/* Many option ROMs use the hard coded interrupt entry points in the
* system bios. So install them at the known locations.
- * Only need int10 so far.
*/
/* int42 is the relocated int10 */
- write_idt_stub((void *)0xff065, 0x42);
+ write_idt_stub((void *)0xff065, 0x42);
+
+ /* VIA's VBIOS calls f000:f859 instead of int15 */
+ write_idt_stub((void *)0xff859, 0x15);
}
void run_bios(struct device *dev, unsigned long addr)
+++ /dev/null
-#ifndef PCI_REALMODE_H
-#define PCI_REALMODE_H
-
-//struct chip_operations;
-extern struct chip_operations drivers_pci_realmode_ops;
-
-#endif
+++ /dev/null
-#include <console/console.h>
-#include <device/device.h>
-#include <device/pci.h>
-#include <device/pci_ids.h>
-#include <device/pci_ops.h>
-#undef __KERNEL__
-#include <arch/io.h>
-#include <string.h>
-#include "chip.h"
-#include <cbfs.h>
-
-/* vgabios.c. Derived from: */
-
-/*------------------------------------------------------------ -*- C -*-
- * 2 Kernel Monte a.k.a. Linux loading Linux on x86
- *
- * Erik Arjan Hendriks <hendriks@lanl.gov>
- *
- * This version is a derivative of the original two kernel monte
- * which is (C) 2000 Scyld.
- *
- * Copyright (C) 2000 Scyld Computing Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * Portions related to the alpha architecture are:
- *
- * Copyright(C) 2001 University of California. LA-CC Number 01-67.
- * This software has been authored by an employee or employees of the
- * University of California, operator of the Los Alamos National
- * Laboratory under Contract No. W-7405-ENG-36 with the U.S.
- * Department of Energy. The U.S. Government has rights to use,
- * reproduce, and distribute this software. If the software is
- * modified to produce derivative works, such modified software should
- * be clearly marked, so as not to confuse it with the version
- * available from LANL.
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by
- * reference to http://www.gnu.org/licenses/gpl.html.
- *
- * This software is provided by the author(s) "as is" and any express
- * or implied warranties, including, but not limited to, the implied
- * warranties of merchantability and fitness for a particular purpose
- * are disclaimed. In no event shall the author(s) be liable for any
- * direct, indirect, incidental, special, exemplary, or consequential
- * damages (including, but not limited to, procurement of substitute
- * goods or services; loss of use, data, or profits; or business
- * interruption) however caused and on any theory of liability,
- * whether in contract, strict liability, or tort (including
- * negligence or otherwise) arising in any way out of the use of this
- * software, even if advised of the possibility of such damage.
- *
- * $Id: vgabios.c,v 1.100 2006/09/12 15:31:49 indrek Exp $
- *--------------------------------------------------------------------*/
-
-/* Modified to be a self sufficient plug in so that it can be used
- without reliance on other parts of core coreboot
- (C) 2005 Nick.Barker9@btinternet.com
-
- Used initially for epia-m where there are problems getting the bios
- emulator to successfully run this bios.
-*/
-
-/* Declare a temporary global descriptor table - necessary because the
- Core part of the bios no longer sets up any 16 bit segments */
-__asm__ (
- /* pointer to original gdt */
- "gdtarg: \n"
- " .word gdt_limit \n"
- " .long gdt \n"
-
- /* compute the table limit */
- "__mygdt_limit = __mygdt_end - __mygdt - 1 \n"
-
- "__mygdtaddr: \n"
- " .word __mygdt_limit \n"
- " .long __mygdt \n"
-
- "__mygdt: \n"
- /* selgdt 0, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 8, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 0x10, flat code segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x9b, 0xcf, 0x00 \n"
-
- /* selgdt 0x18, flat data segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x93, 0xcf, 0x00 \n"
-
- /* selgdt 0x20, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 0x28 16-bit 64k code at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x9a, 0, 0 \n"
-
- /* selgdt 0x30 16-bit 64k data at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x92, 0, 0 \n"
-
- "__mygdt_end: \n"
-);
-
-/* Declare a pointer to where our idt is going to be i.e. at mem zero */
-__asm__ ("__myidt: \n"
- /* 16-bit limit */
- " .word 1023 \n"
- /* 24-bit base */
- " .long 0 \n"
- " .word 0 \n"
-);
-
-/* The address arguments to this function are PHYSICAL ADDRESSES */
-static void real_mode_switch_call_vga(unsigned long devfn)
-{
- __asm__ __volatile__ (
- // paranoia -- does ecx get saved? not sure. This is
- // the easiest safe thing to do.
- " pushal \n"
- /* save the stack */
- " mov %esp, __stack \n"
- " jmp 1f \n"
- "__stack: .long 0 \n"
- "1:\n"
- /* get devfn into %ecx */
- " movl %esp, %ebp \n"
- " movl 8(%ebp), %ecx \n"
- /* load 'our' gdt */
- " lgdt %cs:__mygdtaddr \n"
-
- /* This configures CS properly for real mode. */
- " ljmp $0x28, $__rms_16bit\n"
- "__rms_16bit: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
-
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax \n"
- " movl %eax, %cr0 \n"
-
- /* Now really going into real mode */
- " ljmp $0, $__rms_real\n"
- "__rms_real: \n"
-
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case. */
- /* Setup a stack */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- " movl $0x1000, %eax \n"
- " movl %eax, %esp \n"
-
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
-
- /* Dump zeros in the other segregs */
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov $0x40, %ax \n"
- " mov %ax, %ds \n"
- " mov %cx, %ax \n"
-
- /* run VGA BIOS at 0xc000:0003 */
- " lcall $0xc000, $0x0003\n"
-
- /* if we got here, just about done.
- * Need to get back to protected mode */
- " movl %cr0, %eax \n"
- " orl $0x0000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0 \n"
-
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $vgarestart\n"
- "vgarestart:\n"
- " .code32\n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* restore proper gdt and idt */
- " lgdt %cs:gdtarg \n"
- " lidt idtarg \n"
-
- ".globl vga_exit \n"
- "vga_exit: \n"
- " mov __stack, %esp \n"
- " popal \n"
- );
-}
-
-__asm__ (".text\n""real_mode_switch_end:\n");
-extern char real_mode_switch_end[];
-
-/* ============================================================================================
- * run VGA ROM
- * */
-
-void do_vgabios(device_t dev)
-{
-
- unsigned long busdevfn;
- unsigned int rom = cbfs_load_optionrom(dev->vendor, dev->device, 0);
- unsigned char *buf;
- unsigned int size = 64*1024;
- int i;
-
- /* clear vga bios data area */
- for (i = 0x400; i < 0x500; i++) {
- *(unsigned char *) i = 0;
- }
-
- if (!dev) {
- printk(BIOS_DEBUG, "NO VGA FOUND\n");
- return;
- }
- printk(BIOS_DEBUG, "found VGA: vid=%x, did=%x\n", dev->vendor, dev->device);
-
- /* declare rom address here - keep any config data out of the way
- * of core LXB stuff */
-
- //pci_write_config32(dev, PCI_ROM_ADDRESS, rom|1);
- printk(BIOS_DEBUG, "rom base, size: %x\n", rom);
-
- buf = (unsigned char *) rom;
- if ((buf[0] == 0x55) && (buf[1] == 0xaa)) {
- memcpy((void *) 0xc0000, buf, size);
-
-// write_protect_vgabios(); // in northbridge, not universal
-
- // check signature again
- buf = (unsigned char *) 0xc0000;
- if (buf[0]==0x55 && buf[1]==0xAA) {
- busdevfn = (dev->bus->secondary << 8) | dev->path.pci.devfn;
- printk(BIOS_DEBUG, "bus/devfn = %#x\n", busdevfn);
-
- real_mode_switch_call_vga(busdevfn);
- } else
- printk(BIOS_DEBUG, "Failed to copy VGA BIOS to 0xc0000\n");
- } else
- printk(BIOS_DEBUG, "BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]);
-
- pci_write_config32(dev, PCI_ROM_ADDRESS, 0);
-}
-
-/* ============================================================================================
-/* call vga bios int 10 function 0x4f14 to enable main console
- *
- * vga bios does not always autosence the main console so forcing it on is good !!
- * */
-static void vga_enable_console(void)
-{
- __asm__ __volatile__ (
- /* paranoia -- does ecx get saved? not sure. This is
- * the easiest safe thing to do. */
- " pushal \n"
- /* save the stack */
- " mov %esp, __stack \n"
-
- /* load 'our' gdt */
- " lgdt %cs:__mygdtaddr \n"
-
- /* This configures CS properly for real mode. */
- " ljmp $0x28, $__vga_ec_16bit\n"
- "__vga_ec_16bit: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
-
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax\n"
- " movl %eax, %cr0 \n"
-
- /* Now really going into real mode */
- " ljmp $0, $__vga_ec_real \n"
- "__vga_ec_real: \n"
-
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case. */
- /* Setup a stack */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- " movl $0x1000, %eax \n"
- " movl %eax, %esp \n"
-
- /* debugging for RGM */
- " mov $0x11, %al \n"
- " outb %al, $0x80 \n"
-
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
-
- /* Dump zeros in the other segregs */
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
-
- /* ask bios to enable main console */
- /* set up for int 10 call - values found from X server
- * bios call routines */
- " movw $0x4f14,%ax \n"
- " movw $0x8003,%bx \n"
- " movw $1, %cx \n"
- " movw $0, %dx \n"
- " movw $0, %di \n"
- " int $0x10 \n"
-
- " movb $0x55, %al \n"
- " outb %al, $0x80 \n"
-
- /* if we got here, just about done.
- * Need to get back to protected mode */
- " movl %cr0, %eax \n"
- " orl $0x0000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0 \n"
-
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $vga_ec_restart\n"
- "vga_ec_restart:\n"
- " .code32\n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* restore proper gdt and idt */
- " lgdt %cs:gdtarg \n"
- " lidt idtarg \n"
- " .globl vga__ec_exit \n"
- "vga_ec_exit:\n"
- " mov __stack, %esp \n"
- " popal\n"
- );
-}
-
-
-
-
-
-/* ============================================================================================
- * real-mode interrupt handlers.
- * These are handled because VGA ROMs tend to call bios ints in real mode
- * */
-
-
-// we had hoped to avoid this.
-// this is a stub IDT only. It's main purpose is to ignore calls
-// to the BIOS.
-// no longer. Dammit. We have to respond to these.
-struct realidt {
- unsigned short offset, cs;
-};
-
-// from a handy writeup that andrey found.
-
-// handler.
-// There are some assumptions we can make here.
-// First, the Top Of Stack (TOS) is located on the top of page zero.
-// we can share this stack between real and protected mode.
-// that simplifies a lot of things ...
-// we'll just push all the registers on the stack as longwords,
-// and pop to protected mode.
-// second, since this only ever runs as part of coreboot,
-// we know all the segment register values -- so we don't save any.
-// keep the handler that calls things small. It can do a call to
-// more complex code in coreboot itself. This helps a lot as we don't
-// have to do address fixup in this little stub, and calls are absolute
-// so the handler is relocatable.
-void handler_vga(void)
-{
- __asm__ __volatile__ (
- " .code16 \n"
- "idthandle: \n"
- " pushal \n"
- " movb $0, %al \n"
- " ljmp $0, $callbiosint16\n"
- "end_idthandle: \n"
- " .code32 \n"
- );
-}
-
-void debughandler_vga(void)
-{
- __asm__ __volatile__ (
- " .code16 \n"
- "debughandle: \n"
- " pushw %cx \n"
- " movw $250, %cx \n"
- "dbh1: \n"
- " loop dbh1 \n"
- " popw %cx \n"
- " iret \n"
- "end_debughandle: \n"
- ".code32 \n"
- );
-}
-
-// Calling conventions. The first C function is called with this stuff
-// on the stack. They look like value parameters, but note that if you
-// modify them they will go back to the INTx function modified.
-// the C function will call the biosint function with these as
-// REFERENCE parameters. In this way, we can easily get
-// returns back to the INTx caller (i.e. vgabios)
-void callbiosint_vga(void)
-{
- __asm__ __volatile__ (
- " .code16 \n"
- "callbiosint16: \n"
- " push %ds \n"
- " push %es \n"
- " push %fs \n"
- " push %gs \n"
- // clean up the int #. To save space we put it in the lower
- // byte. But the top 24 bits are junk.
- " andl $0xff, %eax\n"
- // this push does two things:
- // - put the INT # on the stack as a parameter
- // - provides us with a temp for the %cr0 mods.
- " pushl %eax \n"
- " movl %cr0, %eax\n"
- " orl $0x00000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0\n"
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $biosprotect\n"
- "biosprotect: \n"
- " .code32 \n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- " lidt idtarg \n"
- " call biosint_vga \n"
- // back to real mode ...
- " ljmp $0x28, $__rms_16bit2\n"
- "__rms_16bit2: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax \n"
- " movl %eax, %cr0 \n"
-
- /* Now really going into real mode */
- " ljmp $0, $__rms_real2 \n"
- "__rms_real2: \n"
-
- /* Setup a stack
- * FixME: where is esp? */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
-
- /* ebugging for RGM */
- " mov $0x11, %al \n"
- " outb %al, $0x80 \n"
-
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
-
- /* Dump zeros in the other segregs */
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov $0x40, %ax \n"
- " mov %ax, %ds \n"
-
- /* pop the INT # that you pushed earlier */
- " popl %eax \n"
- " pop %gs \n"
- " pop %fs \n"
- " pop %es \n"
- " pop %ds \n"
- " popal \n"
- " iret \n"
- " .code32 \n"
- );
-}
-
-
-
-
-
-enum {
- PCIBIOS = 0x1a,
- MEMSIZE = 0x12
-};
-
-int pcibios_vga(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags);
-
-int handleint21_vga(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags
- );
-
-extern void vga_exit(void);
-
-int biosint_vga(unsigned long intnumber,
- unsigned long gsfs, unsigned long dses,
- unsigned long edi, unsigned long esi,
- unsigned long ebp, unsigned long esp,
- unsigned long ebx, unsigned long edx,
- unsigned long ecx, unsigned long eax,
- unsigned long cs_ip, unsigned short stackflags)
-{
- unsigned long ip;
- unsigned long cs;
- unsigned long flags;
- int ret = -1;
-
- ip = cs_ip & 0xffff;
- cs = cs_ip >> 16;
- flags = stackflags;
-
- printk(BIOS_DEBUG, "biosint: INT# 0x%lx\n", intnumber);
- printk(BIOS_DEBUG, "biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n",
- eax, ebx, ecx, edx);
- printk(BIOS_DEBUG, "biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n",
- ebp, esp, edi, esi);
- printk(BIOS_DEBUG, "biosint: ip 0x%x cs 0x%x flags 0x%x\n",
- ip, cs, flags);
-
- // cases in a good compiler are just as good as your own tables.
- switch (intnumber) {
- case 0 ... 15:
- // These are not BIOS service, but the CPU-generated exceptions
- printk(BIOS_INFO, "biosint: Oops, exception %u\n", intnumber);
- if (esp < 0x1000) {
- printk(BIOS_DEBUG, "Stack contents: ");
- while (esp < 0x1000) {
- printk(BIOS_DEBUG, "0x%04x ", *(unsigned short *) esp);
- esp += 2;
- }
- printk(BIOS_DEBUG, "\n");
- }
- printk(BIOS_DEBUG, "biosint: Bailing out\n");
- // "longjmp"
- vga_exit();
- break;
-
- case PCIBIOS:
- ret = pcibios_vga( &edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
- break;
- case MEMSIZE:
- // who cares.
- eax = 64 * 1024;
- ret = 0;
- break;
- case 0x15:
- ret=handleint21_vga( &edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
- break;
- default:
- printk(BIOS_INFO, "BIOSINT: Unsupport int #0x%x\n",
- intnumber);
- break;
- }
- if (ret)
- flags |= 1; // carry flags
- else
- flags &= ~1;
- stackflags = flags;
- return ret;
-}
-
-
-
-
-enum {
- CHECK = 0xb001,
- FINDDEV = 0xb102,
- READCONFBYTE = 0xb108,
- READCONFWORD = 0xb109,
- READCONFDWORD = 0xb10a,
- WRITECONFBYTE = 0xb10b,
- WRITECONFWORD = 0xb10c,
- WRITECONFDWORD = 0xb10d
-};
-
-// errors go in AH. Just set these up so that word assigns
-// will work. KISS.
-enum {
- PCIBIOS_NODEV = 0x8600,
- PCIBIOS_BADREG = 0x8700
-};
-
-int
-pcibios_vga(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags)
-{
- unsigned long edi = *pedi;
- unsigned long esi = *pesi;
- unsigned long ebp = *pebp;
- unsigned long esp = *pesp;
- unsigned long ebx = *pebx;
- unsigned long edx = *pedx;
- unsigned long ecx = *pecx;
- unsigned long eax = *peax;
- unsigned long flags = *pflags;
- unsigned short func = (unsigned short) eax;
- int retval = 0;
- unsigned short devid, vendorid, devfn;
- short devindex; /* Use short to get rid of gabage in upper half of 32-bit register */
- unsigned char bus;
- device_t dev;
-
- switch(func) {
- case CHECK:
- *pedx = 0x4350;
- *pecx = 0x2049;
- retval = 0;
- break;
- case FINDDEV:
- {
- devid = *pecx;
- vendorid = *pedx;
- devindex = *pesi;
- dev = 0;
- while ((dev = dev_find_device(vendorid, devid, dev))) {
- if (devindex <= 0)
- break;
- devindex--;
- }
- if (dev) {
- unsigned short busdevfn;
- *peax = 0;
- // busnum is an unsigned char;
- // devfn is an int, so we mask it off.
- busdevfn = (dev->bus->secondary << 8)
- | (dev->path.pci.devfn & 0xff);
- printk(BIOS_DEBUG, "0x%x: return 0x%x\n", func, busdevfn);
- *pebx = busdevfn;
- retval = 0;
- } else {
- *peax = PCIBIOS_NODEV;
- retval = -1;
- }
- }
- break;
- case READCONFDWORD:
- case READCONFWORD:
- case READCONFBYTE:
- case WRITECONFDWORD:
- case WRITECONFWORD:
- case WRITECONFBYTE:
- {
- unsigned long dword;
- unsigned short word;
- unsigned char byte;
- unsigned char reg;
-
- devfn = *pebx & 0xff;
- bus = *pebx >> 8;
- reg = *pedi;
- dev = dev_find_slot(bus, devfn);
- if (! dev) {
- printk(BIOS_DEBUG, "0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn);
- // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn!
- *peax = PCIBIOS_BADREG;
- retval = -1;
- }
- switch(func) {
- case READCONFBYTE:
- byte = pci_read_config8(dev, reg);
- *pecx = byte;
- break;
- case READCONFWORD:
- word = pci_read_config16(dev, reg);
- *pecx = word;
- break;
- case READCONFDWORD:
- dword = pci_read_config32(dev, reg);
- *pecx = dword;
- break;
- case WRITECONFBYTE:
- byte = *pecx;
- pci_write_config8(dev, reg, byte);
- break;
- case WRITECONFWORD:
- word = *pecx;
- pci_write_config16(dev, reg, word);
- break;
- case WRITECONFDWORD:
- dword = *pecx;
- pci_write_config32(dev, reg, dword);
- break;
- }
-
- if (retval)
- retval = PCIBIOS_BADREG;
- printk(BIOS_DEBUG, "0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
- func, bus, devfn, reg, *pecx);
- *peax = 0;
- retval = 0;
- }
- break;
- default:
- printk(BIOS_ERR, "UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func);
- break;
- }
-
- return retval;
-}
-
-int handleint21_vga(unsigned long *edi, unsigned long *esi, unsigned long *ebp,
- unsigned long *esp, unsigned long *ebx, unsigned long *edx,
- unsigned long *ecx, unsigned long *eax, unsigned long *flags)
-{
- int res=-1;
- switch(*eax&0xffff)
- {
- case 0x5f19:
- break;
- case 0x5f18:
- *eax=0x5f;
- *ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
- *ecx=0x060;
- res=0;
- break;
- case 0x5f00:
- *eax = 0x8600;
- break;
- case 0x5f01:
- *eax = 0x5f;
- *ecx = (*ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
- res = 0;
- break;
- case 0x5f02:
- *eax=0x5f;
- *ebx= (*ebx & 0xffff0000) | 2;
- *ecx= (*ecx & 0xffff0000) | 0x401; // PAL + crt only
- *edx= (*edx & 0xffff0000) | 0; // TV Layout - default
- res=0;
- break;
- case 0x5f0f:
- *eax=0x860f;
- break;
- }
- return res;
-}
-
-
-
-
-/* ============================================================================================
- * This function sets up bios and pci interrupt handlers for real mode
- * This is needed when running VGA BIOS in real mode
- * */
-
-
-void setup_realmode_idt_vga(void)
-{
- extern unsigned char idthandle, end_idthandle;
- extern unsigned char debughandle, end_debughandle;
-
- int i;
- struct realidt *idts = (struct realidt *) 0;
- int codesize = &end_idthandle - &idthandle;
- unsigned char *intbyte, *codeptr;
-
- // for each int, we create a customized little handler
- // that just pushes %ax, puts the int # in %al,
- // then calls the common interrupt handler.
- // this necessitated because intel didn't know much about
- // architecture when they did the 8086 (it shows)
- // (hmm do they know anymore even now :-)
- // obviously you can see I don't really care about memory
- // efficiency. If I did I would probe back through the stack
- // and get it that way. But that's really disgusting.
- for (i = 0; i < 256; i++) {
- idts[i].cs = 0;
- codeptr = (char*) 4096 + i * codesize;
- idts[i].offset = (unsigned) codeptr;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = i;
- }
-
- // fixed entry points
-
- // VGA BIOSes tend to hardcode f000:f065 as the previous handler of
- // int10.
- // calling convention here is the same as INTs, we can reuse
- // the int entry code.
- codeptr = (char*) 0xff065;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = 0x42; /* int42 is the relocated int10 */
-
- /* debug handler - useful to set a programmable delay between instructions if the
- TF bit is set upon call to real mode */
- idts[1].cs = 0;
- idts[1].offset = 16384;
- memcpy(16384, &debughandle, &end_debughandle - &debughandle);
-
-
-}
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-/* ============================================================================================
- * initializes vga bios during device initialization
- * */
-static void vga_init(device_t dev)
-{
- struct drivers_pci_realmode_config *cfg = (struct drivers_pci_realmode_config *)dev->chip_info;
-
- // code to make vga init go through the emulator - as of yet this does not workfor the epia-m
- dev->on_mainboard=1;
- pci_dev_init(dev);
-
- // code to make vga init run in real mode - does work but against the current coreboot philosophy
- printk(BIOS_DEBUG, "INSTALL REAL-MODE IDT\n");
- setup_realmode_idt();
- printk(BIOS_DEBUG, "DO THE VGA BIOS\n");
- do_vgabios(dev);
-
- vga_enable_console();
-
- pci_write_config32(dev,0x30,0);
-}
-
-
-// device operations : on vga device init, call vga_init
-static struct device_operations drivers_pci_realmode_dev_ops = {
- .init = vga_init,
- .read_resources = pci_dev_read_resources,
- .set_resources = pci_dev_set_resources,
- .enable_resources = pci_dev_enable_resources,
- .scan_bus = 0,
-};
-
-
-/* ============================================================================================
- * FIRST LOOP : traversing static.c list and enabling all chips found in there
- * set given device operations descriptor to call vga_initialize
- * */
-
-void vga_configure_pci(device_t dev){
- printk(BIOS_DEBUG, "Setting VGA callback\n");
- dev->ops = &drivers_pci_realmode_dev_ops;
-}
-
-// PCI VGA device operations
-struct chip_operations drivers_pci_realmode_ops = {
- .enable_dev = vga_configure_pci,
-};
default 0
depends on NORTHBRIDGE_VIA_CN400
-# this is done by the northbridge's vgabios.c already
-config VGA_ROM_RUN
- bool
- default n
- depends on NORTHBRIDGE_VIA_CN400
-
-config PCI_ROM_RUN
- bool
- default n
- depends on NORTHBRIDGE_VIA_CN400
-
# TODO: Values are from the CX700 datasheet, not sure if this matches CN400.
# TODO: What should be the per-chipset default value here?
choice
## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##
-obj-y += vgabios.o
-
driver-y += northbridge.o
driver-y += agp.o
driver-y += vga.o
#include <string.h>
#include <bitops.h>
#include <cpu/cpu.h>
+#include <arch/interrupt.h>
#include "chip.h"
#include "northbridge.h"
#include "cn400.h"
-#include "vgachip.h"
-void write_protect_vgabios(void)
+static int via_cn400_int15_handler(struct eregs *regs)
{
- /* Don't bother for now. */
+ int res=-1;
+ printk(BIOS_DEBUG, "via_cn400_int15_handler\n");
+ switch(regs->eax & 0xffff) {
+ case 0x5f19:
+ break;
+ case 0x5f18:
+ regs->eax=0x5f;
+ regs->ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
+ regs->ecx=0x060;
+ res=0;
+ break;
+ case 0x5f00:
+ regs->eax = 0x8600;
+ break;
+ case 0x5f01:
+ regs->eax = 0x5f;
+ regs->ecx = (regs->ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
+ res = 0;
+ break;
+ case 0x5f02:
+ regs->eax=0x5f;
+ regs->ebx= (regs->ebx & 0xffff0000) | 2;
+ regs->ecx= (regs->ecx & 0xffff0000) | 0x401; // PAL + crt only
+ regs->edx= (regs->edx & 0xffff0000) | 0; // TV Layout - default
+ res=0;
+ break;
+ case 0x5f0f:
+ regs->eax=0x860f;
+ break;
+ default:
+ printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
+ regs->eax & 0xffff);
+ break;
+ }
+ return res;
}
static void vga_init(device_t dev)
{
u8 reg8;
u32 temp;
-#ifdef DEBUG_CN400
- int i, j;
-#endif
+ mainboard_interrupt_handlers(0x15, &via_cn400_int15_handler);
+
+#undef OLD_BOCHS_METHOD
+#ifdef OLD_BOCHS_METHOD
+ // XXX We might need more bios hooks in the f segment, but
+ // this way of copying the BOCHS BIOS does not work anymore.
+ // As soon as someone verifies that CN400 can init VGA, the
+ // code should be removed.
temp = (0xffffffff - CONFIG_FALLBACK_SIZE - 0xffff);
printk(BIOS_DEBUG, "Copying BOCHS BIOS from 0x%08X to 0xf000\n", temp);
/*
*/
//memcpy(0xf0000, (0xffffffff - CONFIG_ROM_SIZE - 0xffff), 0x10000);
memcpy((void *)0xf0000, (void *)temp, 0x10000);
- printk(BIOS_DEBUG, "Initializing VGA\n");
+#endif
/* Set memory rate to 200 MHz. */
outb(0x3d, CRTM_INDEX);
pci_write_config32(dev, 0x10, 0xf0000008);
pci_write_config32(dev, 0x14, 0xf4000000);
- printk(BIOS_DEBUG, "INSTALL REAL-MODE IDT\n");
- setup_realmode_idt();
- printk(BIOS_DEBUG, "DO THE VGA BIOS\n");
- do_vgabios();
- /* VGA seems to work without this, but crash & burn with it. */
- // printk(BIOS_DEBUG, "Enable VGA console\n");
- // vga_enable_console();
+ printk(BIOS_DEBUG, "Initializing VGA...\n");
+
+ pci_dev_init(dev);
/* It's not clear if these need to be programmed before or after
* the VGA BIOS runs. Try both, clean up later. */
+
/* Set memory rate to 200 MHz (again). */
outb(0x3d, CRTM_INDEX);
reg8 = inb(CRTM_DATA);
outb(0x39, SR_INDEX);
outb(reg8, SR_DATA);
+#ifdef OLD_BOCHS_METHOD
/* Clear the BOCHS BIOS out of memory, so it doesn't confuse Linux. */
memset((void *)0xf0000, 0, 0x10000);
+#endif
#ifdef DEBUG_CN400
+ int i, j;
+
printk(BIOS_SPEW, "%s PCI Header Regs::\n", dev_path(dev));
for (i = 0 ; i < 16; i++)
+++ /dev/null
-#include <console/console.h>
-#include <device/pci.h>
-#include <device/pci_ids.h>
-#include <device/pci_ops.h>
-#undef __KERNEL__
-#include <arch/io.h>
-//#include <printk.h>
-#include <string.h>
-#include "vgachip.h"
-#include <cbfs.h>
-
-/* vgabios.c. Derived from: */
-
-/*------------------------------------------------------------ -*- C -*-
- * 2 Kernel Monte a.k.a. Linux loading Linux on x86
- *
- * Erik Arjan Hendriks <hendriks@lanl.gov>
- *
- * This version is a derivative of the original two kernel monte
- * which is (C) 2000 Scyld.
- *
- * Copyright (C) 2000 Scyld Computing Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * Portions related to the alpha architecture are:
- *
- * Copyright(C) 2001 University of California. LA-CC Number 01-67.
- * This software has been authored by an employee or employees of the
- * University of California, operator of the Los Alamos National
- * Laboratory under Contract No. W-7405-ENG-36 with the U.S.
- * Department of Energy. The U.S. Government has rights to use,
- * reproduce, and distribute this software. If the software is
- * modified to produce derivative works, such modified software should
- * be clearly marked, so as not to confuse it with the version
- * available from LANL.
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by
- * reference to http://www.gnu.org/licenses/gpl.html.
- *
- * This software is provided by the author(s) "as is" and any express
- * or implied warranties, including, but not limited to, the implied
- * warranties of merchantability and fitness for a particular purpose
- * are disclaimed. In no event shall the author(s) be liable for any
- * direct, indirect, incidental, special, exemplary, or consequential
- * damages (including, but not limited to, procurement of substitute
- * goods or services; loss of use, data, or profits; or business
- * interruption) however caused and on any theory of liability,
- * whether in contract, strict liability, or tort (including
- * negligence or otherwise) arising in any way out of the use of this
- * software, even if advised of the possibility of such damage.
- *
- * $Id: vgabios.c,v 1.5 2004/10/06 17:33:52 rminnich Exp $
- *--------------------------------------------------------------------*/
-
-/* Modified to be a self sufficient plug in so that it can be used
- without reliance on other parts of coreboot's core
- (C) 2005 Nick.Barker9@btinternet.com
-
- Used initially for epia-m where there are problems getting the bios
- emulator to successfully run this bios.
-*/
-
-/* Declare a temporary global descriptor table - necessary because the
- Core part of the bios no longer sets up any 16 bit segments */
-__asm__ (
- /* pointer to original gdt */
- "gdtarg: \n"
- " .word gdt_limit \n"
- " .long gdt \n"
-
- /* compute the table limit */
- "__mygdt_limit = __mygdt_end - __mygdt - 1 \n"
-
- "__mygdtaddr: \n"
- " .word __mygdt_limit \n"
- " .long __mygdt \n"
-
- "__mygdt: \n"
- /* selgdt 0, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 8, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 0x10, flat code segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x9b, 0xcf, 0x00 \n"
-
- /* selgdt 0x18, flat data segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x93, 0xcf, 0x00 \n"
-
- /* selgdt 0x20, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 0x28 16-bit 64k code at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x9a, 0, 0 \n"
-
- /* selgdt 0x30 16-bit 64k data at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x92, 0, 0 \n"
-
- "__mygdt_end: \n"
-);
-
-/* Declare a pointer to where our idt is going to be i.e. at mem zero */
-__asm__ ("__myidt: \n"
- /* 16-bit limit */
- " .word 1023 \n"
- /* 24-bit base */
- " .long 0 \n"
- " .word 0 \n"
-);
-
-/* The address arguments to this function are PHYSICAL ADDRESSES */
-static void real_mode_switch_call_vga(unsigned long devfn)
-{
- __asm__ __volatile__ (
- // paranoia -- does ecx get saved? not sure. This is
- // the easiest safe thing to do.
- " pushal \n"
- /* save the stack */
- " mov %esp, __stack \n"
- " jmp 1f \n"
- "__stack: .long 0 \n"
- "1:\n"
- /* get devfn into %ecx */
- " movl %esp, %ebp \n"
- " movl 8(%ebp), %ecx \n"
- /* load 'our' gdt */
- " lgdt %cs:__mygdtaddr \n"
-
- /* This configures CS properly for real mode. */
- " ljmp $0x28, $__rms_16bit\n"
- "__rms_16bit: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
-
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax \n"
- " movl %eax, %cr0 \n"
-
- /* Now really going into real mode */
- " ljmp $0, $__rms_real\n"
- "__rms_real: \n"
-
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case.
- /* Setup a stack */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- " movl $0x1000, %eax \n"
- " movl %eax, %esp \n"
-
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
-
- /* Dump zeros in the other segregs */
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov $0x40, %ax \n"
- " mov %ax, %ds \n"
- " mov %cx, %ax \n"
-
- /* run VGA BIOS at 0xc000:0003 */
- " lcall $0xc000, $0x0003\n"
-
- /* if we got here, just about done.
- * Need to get back to protected mode */
- " movl %cr0, %eax \n"
- " orl $0x0000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0 \n"
-
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $vgarestart\n"
- "vgarestart:\n"
- " .code32\n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* restore proper gdt and idt */
- " lgdt %cs:gdtarg \n"
- " lidt idtarg \n"
-
- ".globl vga_exit \n"
- "vga_exit: \n"
- " mov __stack, %esp \n"
- " popal \n"
- );
-}
-
-__asm__ (".text\n""real_mode_switch_end:\n");
-extern char real_mode_switch_end[];
-
-/* call vga bios int 10 function 0x4f14 to enable main console
- epia-m does not always autosence the main console so forcing it on is good !! */
-void vga_enable_console()
-{
- __asm__ __volatile__ (
- /* paranoia -- does ecx get saved? not sure. This is
- * the easiest safe thing to do. */
- " pushal \n"
- /* save the stack */
- " mov %esp, __stack \n"
-
- /* load 'our' gdt */
- " lgdt %cs:__mygdtaddr \n"
-
- /* This configures CS properly for real mode. */
- " ljmp $0x28, $__vga_ec_16bit\n"
- "__vga_ec_16bit: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
-
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax\n"
- " movl %eax, %cr0 \n"
-
- /* Now really going into real mode */
- " ljmp $0, $__vga_ec_real \n"
- "__vga_ec_real: \n"
-
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case.
- /* Setup a stack */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- " movl $0x1000, %eax \n"
- " movl %eax, %esp \n"
-
- /* debugging for RGM */
- " mov $0x11, %al \n"
- " outb %al, $0x80 \n"
-
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
-
- /* Dump zeros in the other segregs */
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
-
- /* ask bios to enable main console */
- /* set up for int 10 call - values found from X server
- * bios call routines */
- " movw $0x4f14,%ax \n"
- " movw $0x8003,%bx \n"
- " movw $1, %cx \n"
- " movw $0, %dx \n"
- " movw $0, %di \n"
- " int $0x10 \n"
-
- " movb $0x55, %al \n"
- " outb %al, $0x80 \n"
-
- /* if we got here, just about done.
- * Need to get back to protected mode */
- " movl %cr0, %eax \n"
- " orl $0x0000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0 \n"
-
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $vga_ec_restart\n"
- "vga_ec_restart:\n"
- " .code32\n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* restore proper gdt and idt */
- " lgdt %cs:gdtarg \n"
- " lidt idtarg \n"
- " .globl vga__ec_exit \n"
- "vga_ec_exit:\n"
- " mov __stack, %esp \n"
- " popal\n"
- );
-}
-
-void do_vgabios(void)
-{
- device_t dev;
- unsigned long busdevfn;
- u32 rom;
- unsigned char *buf;
- unsigned int size = 64*1024;
- int i;
-
- /* clear vga bios data area */
- for (i = 0x400; i < 0x500; i++) {
- *(unsigned char *) i = 0;
- }
-
- dev = dev_find_class(PCI_CLASS_DISPLAY_VGA<<8 , 0);
-
- if (!dev) {
- printk(BIOS_DEBUG, "NO VGA FOUND\n");
- return;
- }
- printk(BIOS_DEBUG, "found VGA: vid=%x, did=%x\n", dev->vendor, dev->device);
-
- /* declare rom address here - keep any config data out of the way
- * of core LXB stuff */
-
- rom = (u32)cbfs_load_optionrom(dev->vendor, dev->device, 0);
- pci_write_config32(dev, PCI_ROM_ADDRESS, rom|1);
- printk(BIOS_DEBUG, "VGA BIOS ROM base address: %x\n", rom);
-
- buf = (unsigned char *) rom;
- if ((buf[0] == 0x55) && (buf[1] == 0xaa)) {
- memcpy((void *) 0xc0000, buf, size);
-
- write_protect_vgabios(); // in northbridge
-
- // check signature again
- buf = (unsigned char *) 0xc0000;
- if (buf[0]==0x55 && buf[1]==0xAA) {
- busdevfn = (dev->bus->secondary << 8) | dev->path.pci.devfn;
- printk(BIOS_DEBUG, "bus/devfn = %#lx\n", busdevfn);
-
- real_mode_switch_call_vga(busdevfn);
- } else
- printk(BIOS_DEBUG, "Failed to copy VGA BIOS to 0xc0000\n");
- } else
- printk(BIOS_DEBUG, "BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]);
-
- pci_write_config32(dev, PCI_ROM_ADDRESS, 0);
-}
-
-
-// we had hoped to avoid this.
-// this is a stub IDT only. It's main purpose is to ignore calls
-// to the BIOS.
-// no longer. Dammit. We have to respond to these.
-struct realidt {
- unsigned short offset, cs;
-};
-
-// from a handy writeup that andrey found.
-
-// handler.
-// There are some assumptions we can make here.
-// First, the Top Of Stack (TOS) is located on the top of page zero.
-// we can share this stack between real and protected mode.
-// that simplifies a lot of things ...
-// we'll just push all the registers on the stack as longwords,
-// and pop to protected mode.
-// second, since this only ever runs as part of coreboot,
-// we know all the segment register values -- so we don't save any.
-// keep the handler that calls things small. It can do a call to
-// more complex code in coreboot itself. This helps a lot as we don't
-// have to do address fixup in this little stub, and calls are absolute
-// so the handler is relocatable.
-void handler(void)
-{
- __asm__ __volatile__ (
- " .code16 \n"
- "idthandle: \n"
- " pushal \n"
- " movb $0, %al \n"
- " ljmp $0, $callbiosint16\n"
- "end_idthandle: \n"
- " .code32 \n"
- );
-}
-
-void debughandler(void)
-{
- __asm__ __volatile__ (
- " .code16 \n"
- "debughandle: \n"
- " pushw %cx \n"
- " movw $250, %cx \n"
- "dbh1: \n"
- " loop dbh1 \n"
- " popw %cx \n"
- " iret \n"
- "end_debughandle: \n"
- ".code32 \n"
- );
-}
-
-// Calling conventions. The first C function is called with this stuff
-// on the stack. They look like value parameters, but note that if you
-// modify them they will go back to the INTx function modified.
-// the C function will call the biosint function with these as
-// REFERENCE parameters. In this way, we can easily get
-// returns back to the INTx caller (i.e. vgabios)
-void callbiosint(void)
-{
- __asm__ __volatile__ (
- " .code16 \n"
- "callbiosint16: \n"
- " push %ds \n"
- " push %es \n"
- " push %fs \n"
- " push %gs \n"
- // clean up the int #. To save space we put it in the lower
- // byte. But the top 24 bits are junk.
- " andl $0xff, %eax\n"
- // this push does two things:
- // - put the INT # on the stack as a parameter
- // - provides us with a temp for the %cr0 mods.
- " pushl %eax \n"
- " movl %cr0, %eax\n"
- " orl $0x00000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0\n"
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $biosprotect\n"
- "biosprotect: \n"
- " .code32 \n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- " lidt idtarg \n"
- " call biosint \n"
- // back to real mode ...
- " ljmp $0x28, $__rms_16bit2\n"
- "__rms_16bit2: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax \n"
- " movl %eax, %cr0 \n"
-
- /* Now really going into real mode */
- " ljmp $0, $__rms_real2 \n"
- "__rms_real2: \n"
-
- /* Setup a stack
- * FixME: where is esp? */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
-
- /* ebugging for RGM */
- " mov $0x11, %al \n"
- " outb %al, $0x80 \n"
-
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
-
- /* Dump zeros in the other segregs */
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov $0x40, %ax \n"
- " mov %ax, %ds \n"
-
- /* pop the INT # that you pushed earlier */
- " popl %eax \n"
- " pop %gs \n"
- " pop %fs \n"
- " pop %es \n"
- " pop %ds \n"
- " popal \n"
- " iret \n"
- " .code32 \n"
- );
-}
-
-enum {
- PCIBIOS = 0x1a,
- MEMSIZE = 0x12
-};
-
-int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags);
-
-int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags
- );
-
-extern void vga_exit(void);
-
-int biosint(unsigned long intnumber,
- unsigned long gsfs, unsigned long dses,
- unsigned long edi, unsigned long esi,
- unsigned long ebp, unsigned long esp,
- unsigned long ebx, unsigned long edx,
- unsigned long ecx, unsigned long eax,
- unsigned long cs_ip, unsigned short stackflags)
-{
- unsigned long ip;
- unsigned long cs;
- unsigned long flags;
- int ret = -1;
-
- ip = cs_ip & 0xffff;
- cs = cs_ip >> 16;
- flags = stackflags;
-
- printk(BIOS_DEBUG, "biosint: INT# 0x%lx\n", intnumber);
- printk(BIOS_DEBUG, "biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n",
- eax, ebx, ecx, edx);
- printk(BIOS_DEBUG, "biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n",
- ebp, esp, edi, esi);
- printk(BIOS_DEBUG, "biosint: ip 0x%lx cs 0x%lx flags 0x%lx\n",
- ip, cs, flags);
-
- // cases in a good compiler are just as good as your own tables.
- switch (intnumber) {
- case 0 ... 15:
- // These are not BIOS service, but the CPU-generated exceptions
- printk(BIOS_INFO, "biosint: Oops, exception %lu\n", intnumber);
- if (esp < 0x1000) {
- printk(BIOS_DEBUG, "Stack contents: ");
- while (esp < 0x1000) {
- printk(BIOS_DEBUG, "0x%04x ", *(unsigned short *) esp);
- esp += 2;
- }
- printk(BIOS_DEBUG, "\n");
- }
- printk(BIOS_DEBUG, "biosint: Bailing out\n");
- // "longjmp"
- vga_exit();
- break;
-
- case PCIBIOS:
- ret = pcibios( &edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
- break;
- case MEMSIZE:
- // who cares.
- eax = 64 * 1024;
- ret = 0;
- break;
- case 0x15:
- ret=handleint21( &edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
- break;
- default:
- printk(BIOS_INFO, "BIOSINT: Unsupport int #0x%lx\n", intnumber);
- break;
- }
- if (ret)
- flags |= 1; // carry flags
- else
- flags &= ~1;
- stackflags = flags;
- return ret;
-}
-
-
-void setup_realmode_idt(void)
-{
- extern unsigned char idthandle, end_idthandle;
- extern unsigned char debughandle, end_debughandle;
-
- int i;
- struct realidt *idts = (struct realidt *) 0;
- int codesize = &end_idthandle - &idthandle;
- unsigned char *intbyte, *codeptr;
-
- // for each int, we create a customized little handler
- // that just pushes %ax, puts the int # in %al,
- // then calls the common interrupt handler.
- // this necessitated because intel didn't know much about
- // architecture when they did the 8086 (it shows)
- // (hmm do they know anymore even now :-)
- // obviously you can see I don't really care about memory
- // efficiency. If I did I would probe back through the stack
- // and get it that way. But that's really disgusting.
- for (i = 0; i < 256; i++) {
- idts[i].cs = 0;
- codeptr = (char*) 4096 + i * codesize;
- idts[i].offset = (unsigned) codeptr;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = i;
- }
-
- // fixed entry points
-
- // VGA BIOSes tend to hardcode f000:f065 as the previous handler of
- // int10.
- // calling convention here is the same as INTs, we can reuse
- // the int entry code.
- codeptr = (char*) 0xff065;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = 0x42; /* int42 is the relocated int10 */
-
- /* debug handler - useful to set a programmable delay between instructions if the
- TF bit is set upon call to real mode */
- idts[1].cs = 0;
- idts[1].offset = 16384;
- memcpy(16384, &debughandle, &end_debughandle - &debughandle);
-
-
-}
-
-
-
-enum {
- CHECK = 0xb001,
- FINDDEV = 0xb102,
- READCONFBYTE = 0xb108,
- READCONFWORD = 0xb109,
- READCONFDWORD = 0xb10a,
- WRITECONFBYTE = 0xb10b,
- WRITECONFWORD = 0xb10c,
- WRITECONFDWORD = 0xb10d
-};
-
-// errors go in AH. Just set these up so that word assigns
-// will work. KISS.
-enum {
- PCIBIOS_NODEV = 0x8600,
- PCIBIOS_BADREG = 0x8700
-};
-
-int
-pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags)
-{
- unsigned long edi = *pedi;
- unsigned long esi = *pesi;
- unsigned long ebp = *pebp;
- unsigned long esp = *pesp;
- unsigned long ebx = *pebx;
- unsigned long edx = *pedx;
- unsigned long ecx = *pecx;
- unsigned long eax = *peax;
- unsigned long flags = *pflags;
- unsigned short func = (unsigned short) eax;
- int retval = 0;
- unsigned short devid, vendorid, devfn;
- short devindex; /* Use short to get rid of garbage in upper half of 32-bit register */
- unsigned char bus;
- device_t dev;
-
- switch(func) {
- case CHECK:
- *pedx = 0x4350;
- *pecx = 0x2049;
- retval = 0;
- break;
- case FINDDEV:
- {
- devid = *pecx;
- vendorid = *pedx;
- devindex = *pesi;
- dev = 0;
- while ((dev = dev_find_device(vendorid, devid, dev))) {
- if (devindex <= 0)
- break;
- devindex--;
- }
- if (dev) {
- unsigned short busdevfn;
- *peax = 0;
- // busnum is an unsigned char;
- // devfn is an int, so we mask it off.
- busdevfn = (dev->bus->secondary << 8)
- | (dev->path.pci.devfn & 0xff);
- printk(BIOS_DEBUG, "0x%x: return 0x%x\n", func, busdevfn);
- *pebx = busdevfn;
- retval = 0;
- } else {
- *peax = PCIBIOS_NODEV;
- retval = -1;
- }
- }
- break;
- case READCONFDWORD:
- case READCONFWORD:
- case READCONFBYTE:
- case WRITECONFDWORD:
- case WRITECONFWORD:
- case WRITECONFBYTE:
- {
- unsigned long dword;
- unsigned short word;
- unsigned char byte;
- unsigned char reg;
-
- devfn = *pebx & 0xff;
- bus = *pebx >> 8;
- reg = *pedi;
- dev = dev_find_slot(bus, devfn);
- if (! dev) {
- printk(BIOS_DEBUG, "0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn);
- // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn!
- *peax = PCIBIOS_BADREG;
- retval = -1;
- }
- switch(func) {
- case READCONFBYTE:
- byte = pci_read_config8(dev, reg);
- *pecx = byte;
- break;
- case READCONFWORD:
- word = pci_read_config16(dev, reg);
- *pecx = word;
- break;
- case READCONFDWORD:
- dword = pci_read_config32(dev, reg);
- *pecx = dword;
- break;
- case WRITECONFBYTE:
- byte = *pecx;
- pci_write_config8(dev, reg, byte);
- break;
- case WRITECONFWORD:
- word = *pecx;
- pci_write_config16(dev, reg, word);
- break;
- case WRITECONFDWORD:
- dword = *pecx;
- pci_write_config32(dev, reg, dword);
- break;
- }
-
- if (retval)
- retval = PCIBIOS_BADREG;
- printk(BIOS_DEBUG, "0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
- func, bus, devfn, reg, *pecx);
- *peax = 0;
- retval = 0;
- }
- break;
- default:
- printk(BIOS_ERR, "UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func);
- break;
- }
-
- return retval;
-}
-
-int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp,
- unsigned long *esp, unsigned long *ebx, unsigned long *edx,
- unsigned long *ecx, unsigned long *eax, unsigned long *flags)
-{
- int res=-1;
- switch(*eax&0xffff)
- {
- case 0x5f19:
- break;
- case 0x5f18:
- *eax=0x5f;
- *ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
- *ecx=0x060;
- res=0;
- break;
- case 0x5f00:
- *eax = 0x8600;
- break;
- case 0x5f01:
- *eax = 0x5f;
- *ecx = (*ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
- res = 0;
- break;
- case 0x5f02:
- *eax=0x5f;
- *ebx= (*ebx & 0xffff0000) | 2;
- *ecx= (*ecx & 0xffff0000) | 0x401; // PAL + crt only
- *edx= (*edx & 0xffff0000) | 0; // TV Layout - default
- res=0;
- break;
- case 0x5f0f:
- *eax=0x860f;
- break;
- }
- return res;
-}
+++ /dev/null
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef _PC80_VGABIOS
-#define _PC80_VGABIOS
-
-extern struct chip_control pc80_vgabios_control;
-
-struct pc80_vgabios_config {
- int nothing;
-};
-
-void vga_enable_console(void);
-void do_vgabios(void);
-void setup_realmode_idt(void);
-void write_protect_vgabios(void);
-
-#endif /* _PC80_VGABIOS */
default 0
depends on NORTHBRIDGE_VIA_CN700
-# this is done by the northbridge's vgabios.c already
-config VGA_ROM_RUN
- bool
- default n
- depends on NORTHBRIDGE_VIA_CN700
-
-config PCI_ROM_RUN
- bool
- default n
- depends on NORTHBRIDGE_VIA_CN700
-
# TODO: Values are from the CX700 datasheet, not sure if this matches CN700.
# TODO: What should be the per-chipset default value here?
choice
## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##
-obj-y += vgabios.o
-
driver-y += northbridge.o
driver-y += agp.o
driver-y += vga.o
#include <string.h>
#include <bitops.h>
#include <cpu/cpu.h>
+#include <arch/interrupt.h>
#include "chip.h"
#include "northbridge.h"
#include "cn700.h"
-#include "vgachip.h"
-void write_protect_vgabios(void)
+static int via_cn700_int15_handler(struct eregs *regs)
{
- /* Don't bother for now. */
+ int res=-1;
+ printk(BIOS_DEBUG, "via_cn700_int15_handler\n");
+ switch(regs->eax & 0xffff) {
+ case 0x5f19:
+ break;
+ case 0x5f18:
+ regs->eax=0x5f;
+ regs->ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
+ regs->ecx=0x060;
+ res=0;
+ break;
+ case 0x5f00:
+ regs->eax = 0x8600;
+ break;
+ case 0x5f01:
+ regs->eax = 0x5f;
+ regs->ecx = (regs->ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
+ res = 0;
+ break;
+ case 0x5f02:
+ regs->eax=0x5f;
+ regs->ebx= (regs->ebx & 0xffff0000) | 2;
+ regs->ecx= (regs->ecx & 0xffff0000) | 0x401; // PAL + crt only
+ regs->edx= (regs->edx & 0xffff0000) | 0; // TV Layout - default
+ res=0;
+ break;
+ case 0x5f0f:
+ regs->eax=0x860f;
+ break;
+ default:
+ printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
+ regs->eax & 0xffff);
+ break;
+ }
+ return res;
}
static void vga_init(device_t dev)
{
u8 reg8;
+ mainboard_interrupt_handlers(0x15, &via_cn700_int15_handler);
+
+#undef OLD_BOCHS_METHOD
+#ifdef OLD_BOCHS_METHOD
print_debug("Copying BOCHS BIOS to 0xf000\n");
/*
* Copy BOCHS BIOS from 4G-CONFIG_ROM_SIZE-64k (in flash) to 0xf0000 (in RAM)
* This is for compatibility with the VGA ROM's BIOS callbacks.
*/
memcpy((void *)0xf0000, (const void *)(0xffffffff - CONFIG_ROM_SIZE - 0xffff), 0x10000);
-
- printk(BIOS_DEBUG, "Initializing VGA\n");
+#endif
/* Set memory rate to 200 MHz. */
outb(0x3d, CRTM_INDEX);
pci_write_config32(dev, 0x10, 0xf4000008);
pci_write_config32(dev, 0x14, 0xfb000000);
- printk(BIOS_DEBUG, "INSTALL REAL-MODE IDT\n");
- setup_realmode_idt();
- printk(BIOS_DEBUG, "DO THE VGA BIOS\n");
- do_vgabios();
- /* VGA seems to work without this, but crash & burn with it. */
- // printk(BIOS_DEBUG, "Enable VGA console\n");
- // vga_enable_console();
+ printk(BIOS_DEBUG, "Initializing VGA...\n");
+
+ pci_dev_init(dev);
/* It's not clear if these need to be programmed before or after
* the VGA BIOS runs. Try both, clean up later. */
outb(0x39, SR_INDEX);
outb(reg8, SR_DATA);
+#ifdef OLD_BOCHS_METHOD
/* Clear the BOCHS BIOS out of memory, so it doesn't confuse Linux. */
memset((void *)0xf0000, 0, 0x10000);
+#endif
}
static const struct device_operations vga_operations = {
+++ /dev/null
-#include <console/console.h>
-#include <device/pci.h>
-#include <device/pci_ids.h>
-#include <device/pci_ops.h>
-#undef __KERNEL__
-#include <arch/io.h>
-#include <stddef.h>
-#include <string.h>
-#include "vgachip.h"
-#include <cbfs.h>
-
-/* vgabios.c. Derived from: */
-
-/*------------------------------------------------------------ -*- C -*-
- * 2 Kernel Monte a.k.a. Linux loading Linux on x86
- *
- * Erik Arjan Hendriks <hendriks@lanl.gov>
- *
- * This version is a derivative of the original two kernel monte
- * which is (C) 2000 Scyld.
- *
- * Copyright (C) 2000 Scyld Computing Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * Portions related to the alpha architecture are:
- *
- * Copyright(C) 2001 University of California. LA-CC Number 01-67.
- * This software has been authored by an employee or employees of the
- * University of California, operator of the Los Alamos National
- * Laboratory under Contract No. W-7405-ENG-36 with the U.S.
- * Department of Energy. The U.S. Government has rights to use,
- * reproduce, and distribute this software. If the software is
- * modified to produce derivative works, such modified software should
- * be clearly marked, so as not to confuse it with the version
- * available from LANL.
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by
- * reference to http://www.gnu.org/licenses/gpl.html.
- *
- * This software is provided by the author(s) "as is" and any express
- * or implied warranties, including, but not limited to, the implied
- * warranties of merchantability and fitness for a particular purpose
- * are disclaimed. In no event shall the author(s) be liable for any
- * direct, indirect, incidental, special, exemplary, or consequential
- * damages (including, but not limited to, procurement of substitute
- * goods or services; loss of use, data, or profits; or business
- * interruption) however caused and on any theory of liability,
- * whether in contract, strict liability, or tort (including
- * negligence or otherwise) arising in any way out of the use of this
- * software, even if advised of the possibility of such damage.
- *
- * $Id: vgabios.c,v 1.5 2004/10/06 17:33:52 rminnich Exp $
- *--------------------------------------------------------------------*/
-
-/* Modified to be a self sufficient plug in so that it can be used
- without reliance on other parts of coreboot's core
- (C) 2005 Nick.Barker9@btinternet.com
-
- Used initially for epia-m where there are problems getting the bios
- emulator to successfully run this bios.
-*/
-
-/* Declare a temporary global descriptor table - necessary because the
- Core part of the bios no longer sets up any 16 bit segments */
-__asm__ (
- /* pointer to original gdt */
- "gdtarg: \n"
- " .word gdt_limit \n"
- " .long gdt \n"
-
- /* compute the table limit */
- "__mygdt_limit = __mygdt_end - __mygdt - 1 \n"
-
- "__mygdtaddr: \n"
- " .word __mygdt_limit \n"
- " .long __mygdt \n"
-
- "__mygdt: \n"
- /* selgdt 0, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 8, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 0x10, flat code segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x9b, 0xcf, 0x00 \n"
-
- /* selgdt 0x18, flat data segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x93, 0xcf, 0x00 \n"
-
- /* selgdt 0x20, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
-
- /* selgdt 0x28 16-bit 64k code at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x9a, 0, 0 \n"
-
- /* selgdt 0x30 16-bit 64k data at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x92, 0, 0 \n"
-
- "__mygdt_end: \n"
-);
-
-/* Declare a pointer to where our idt is going to be i.e. at mem zero */
-__asm__ ("__myidt: \n"
- /* 16-bit limit */
- " .word 1023 \n"
- /* 24-bit base */
- " .long 0 \n"
- " .word 0 \n"
-);
-
-/* The address arguments to this function are PHYSICAL ADDRESSES */
-static void real_mode_switch_call_vga(unsigned long devfn)
-{
- __asm__ __volatile__ (
- // paranoia -- does ecx get saved? not sure. This is
- // the easiest safe thing to do.
- " pushal \n"
- /* save the stack */
- " mov %esp, __stack \n"
- " jmp 1f \n"
- "__stack: .long 0 \n"
- "1:\n"
- /* get devfn into %ecx */
- " movl %esp, %ebp \n"
- " movl 8(%ebp), %ecx \n"
- /* load 'our' gdt */
- " lgdt %cs:__mygdtaddr \n"
-
- /* This configures CS properly for real mode. */
- " ljmp $0x28, $__rms_16bit\n"
- "__rms_16bit: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
-
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax \n"
- " movl %eax, %cr0 \n"
-
- /* Now really going into real mode */
- " ljmp $0, $__rms_real\n"
- "__rms_real: \n"
-
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case.
- */
- /* Setup a stack */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- " movl $0x1000, %eax \n"
- " movl %eax, %esp \n"
-
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
-
- /* Dump zeros in the other segregs */
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov $0x40, %ax \n"
- " mov %ax, %ds \n"
- " mov %cx, %ax \n"
-
- /* run VGA BIOS at 0xc000:0003 */
- " lcall $0xc000, $0x0003\n"
-
- /* if we got here, just about done.
- * Need to get back to protected mode */
- " movl %cr0, %eax \n"
- " orl $0x0000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0 \n"
-
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $vgarestart\n"
- "vgarestart:\n"
- " .code32\n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* restore proper gdt and idt */
- " lgdt %cs:gdtarg \n"
- " lidt idtarg \n"
-
- ".globl vga_exit \n"
- "vga_exit: \n"
- " mov __stack, %esp \n"
- " popal \n"
- );
-}
-
-__asm__ (".text\n""real_mode_switch_end:\n");
-extern char real_mode_switch_end[];
-
-/* call vga bios int 10 function 0x4f14 to enable main console
- epia-m does not always autosence the main console so forcing it on is good !! */
-void vga_enable_console()
-{
- __asm__ __volatile__ (
- /* paranoia -- does ecx get saved? not sure. This is
- * the easiest safe thing to do. */
- " pushal \n"
- /* save the stack */
- " mov %esp, __stack \n"
-
- /* load 'our' gdt */
- " lgdt %cs:__mygdtaddr \n"
-
- /* This configures CS properly for real mode. */
- " ljmp $0x28, $__vga_ec_16bit\n"
- "__vga_ec_16bit: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
-
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax\n"
- " movl %eax, %cr0 \n"
-
- /* Now really going into real mode */
- " ljmp $0, $__vga_ec_real \n"
- "__vga_ec_real: \n"
-
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case.
- */
- /* Setup a stack */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- " movl $0x1000, %eax \n"
- " movl %eax, %esp \n"
-
- /* debugging for RGM */
- " mov $0x11, %al \n"
- " outb %al, $0x80 \n"
-
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
-
- /* Dump zeros in the other segregs */
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
-
- /* ask bios to enable main console */
- /* set up for int 10 call - values found from X server
- * bios call routines */
- " movw $0x4f14,%ax \n"
- " movw $0x8003,%bx \n"
- " movw $1, %cx \n"
- " movw $0, %dx \n"
- " movw $0, %di \n"
- " int $0x10 \n"
-
- " movb $0x55, %al \n"
- " outb %al, $0x80 \n"
-
- /* if we got here, just about done.
- * Need to get back to protected mode */
- " movl %cr0, %eax \n"
- " orl $0x0000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0 \n"
-
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $vga_ec_restart\n"
- "vga_ec_restart:\n"
- " .code32\n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* restore proper gdt and idt */
- " lgdt %cs:gdtarg \n"
- " lidt idtarg \n"
- " .globl vga__ec_exit \n"
- "vga_ec_exit:\n"
- " mov __stack, %esp \n"
- " popal\n"
- );
-}
-
-void do_vgabios(void)
-{
- device_t dev;
- unsigned long busdevfn;
- unsigned char *rom;
- unsigned char *buf;
- unsigned int size = 64*1024;
- int i;
-
- /* clear vga bios data area */
- for (i = 0x400; i < 0x500; i++) {
- *(unsigned char *) i = 0;
- }
-
- dev = dev_find_class(PCI_CLASS_DISPLAY_VGA<<8 , 0);
-
- if (!dev) {
- printk(BIOS_DEBUG, "NO VGA FOUND\n");
- return;
- }
- printk(BIOS_DEBUG, "found VGA: vid=%x, did=%x\n", dev->vendor, dev->device);
-
- /* declare rom address here - keep any config data out of the way
- * of core LXB stuff */
-
- rom = cbfs_load_optionrom(dev->vendor, dev->device, NULL);
- pci_write_config32(dev, PCI_ROM_ADDRESS, (u32)rom | 1);
- printk(BIOS_DEBUG, "rom base: %p\n", rom);
-
- buf = (unsigned char *) rom;
- if ((buf[0] == 0x55) && (buf[1] == 0xaa)) {
- memcpy((void *) 0xc0000, buf, size);
-
- write_protect_vgabios(); // in northbridge
-
- // check signature again
- buf = (unsigned char *) 0xc0000;
- if (buf[0]==0x55 && buf[1]==0xAA) {
- busdevfn = (dev->bus->secondary << 8) | dev->path.pci.devfn;
- printk(BIOS_DEBUG, "bus/devfn = %#lx\n", busdevfn);
-
- real_mode_switch_call_vga(busdevfn);
- } else
- printk(BIOS_DEBUG, "Failed to copy VGA BIOS to 0xc0000\n");
- } else
- printk(BIOS_DEBUG, "BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]);
-
- pci_write_config32(dev, PCI_ROM_ADDRESS, 0);
-}
-
-
-// we had hoped to avoid this.
-// this is a stub IDT only. It's main purpose is to ignore calls
-// to the BIOS.
-// no longer. Dammit. We have to respond to these.
-struct realidt {
- unsigned short offset, cs;
-};
-
-// from a handy writeup that andrey found.
-
-// handler.
-// There are some assumptions we can make here.
-// First, the Top Of Stack (TOS) is located on the top of page zero.
-// we can share this stack between real and protected mode.
-// that simplifies a lot of things ...
-// we'll just push all the registers on the stack as longwords,
-// and pop to protected mode.
-// second, since this only ever runs as part of coreboot,
-// we know all the segment register values -- so we don't save any.
-// keep the handler that calls things small. It can do a call to
-// more complex code in coreboot itself. This helps a lot as we don't
-// have to do address fixup in this little stub, and calls are absolute
-// so the handler is relocatable.
-void handler(void)
-{
- __asm__ __volatile__ (
- " .code16 \n"
- "idthandle: \n"
- " pushal \n"
- " movb $0, %al \n"
- " ljmp $0, $callbiosint16\n"
- "end_idthandle: \n"
- " .code32 \n"
- );
-}
-
-void debughandler(void)
-{
- __asm__ __volatile__ (
- " .code16 \n"
- "debughandle: \n"
- " pushw %cx \n"
- " movw $250, %cx \n"
- "dbh1: \n"
- " loop dbh1 \n"
- " popw %cx \n"
- " iret \n"
- "end_debughandle: \n"
- ".code32 \n"
- );
-}
-
-// Calling conventions. The first C function is called with this stuff
-// on the stack. They look like value parameters, but note that if you
-// modify them they will go back to the INTx function modified.
-// the C function will call the biosint function with these as
-// REFERENCE parameters. In this way, we can easily get
-// returns back to the INTx caller (i.e. vgabios)
-void callbiosint(void)
-{
- __asm__ __volatile__ (
- " .code16 \n"
- "callbiosint16: \n"
- " push %ds \n"
- " push %es \n"
- " push %fs \n"
- " push %gs \n"
- // clean up the int #. To save space we put it in the lower
- // byte. But the top 24 bits are junk.
- " andl $0xff, %eax\n"
- // this push does two things:
- // - put the INT # on the stack as a parameter
- // - provides us with a temp for the %cr0 mods.
- " pushl %eax \n"
- " movl %cr0, %eax\n"
- " orl $0x00000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0\n"
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $biosprotect\n"
- "biosprotect: \n"
- " .code32 \n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- " lidt idtarg \n"
- " call biosint \n"
- // back to real mode ...
- " ljmp $0x28, $__rms_16bit2\n"
- "__rms_16bit2: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
-
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax \n"
- " movl %eax, %cr0 \n"
-
- /* Now really going into real mode */
- " ljmp $0, $__rms_real2 \n"
- "__rms_real2: \n"
-
- /* Setup a stack
- * FixME: where is esp? */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
-
- /* ebugging for RGM */
- " mov $0x11, %al \n"
- " outb %al, $0x80 \n"
-
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
-
- /* Dump zeros in the other segregs */
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov $0x40, %ax \n"
- " mov %ax, %ds \n"
-
- /* pop the INT # that you pushed earlier */
- " popl %eax \n"
- " pop %gs \n"
- " pop %fs \n"
- " pop %es \n"
- " pop %ds \n"
- " popal \n"
- " iret \n"
- " .code32 \n"
- );
-}
-
-enum {
- PCIBIOS = 0x1a,
- MEMSIZE = 0x12
-};
-
-int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags);
-
-int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags
- );
-
-extern void vga_exit(void);
-
-int biosint(unsigned long intnumber,
- unsigned long gsfs, unsigned long dses,
- unsigned long edi, unsigned long esi,
- unsigned long ebp, unsigned long esp,
- unsigned long ebx, unsigned long edx,
- unsigned long ecx, unsigned long eax,
- unsigned long cs_ip, unsigned short stackflags)
-{
- unsigned long ip;
- unsigned long cs;
- unsigned long flags;
- int ret = -1;
-
- ip = cs_ip & 0xffff;
- cs = cs_ip >> 16;
- flags = stackflags;
-
- printk(BIOS_DEBUG, "biosint: INT# 0x%lx\n", intnumber);
- printk(BIOS_DEBUG, "biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n",
- eax, ebx, ecx, edx);
- printk(BIOS_DEBUG, "biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n",
- ebp, esp, edi, esi);
- printk(BIOS_DEBUG, "biosint: ip 0x%lx cs 0x%lx flags 0x%lx\n",
- ip, cs, flags);
-
- // cases in a good compiler are just as good as your own tables.
- switch (intnumber) {
- case 0 ... 15:
- // These are not BIOS service, but the CPU-generated exceptions
- printk(BIOS_INFO, "biosint: Oops, exception %lu\n", intnumber);
- if (esp < 0x1000) {
- printk(BIOS_DEBUG, "Stack contents: ");
- while (esp < 0x1000) {
- printk(BIOS_DEBUG, "0x%04x ", *(unsigned short *) esp);
- esp += 2;
- }
- printk(BIOS_DEBUG, "\n");
- }
- printk(BIOS_DEBUG, "biosint: Bailing out\n");
- // "longjmp"
- vga_exit();
- break;
-
- case PCIBIOS:
- ret = pcibios( &edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
- break;
- case MEMSIZE:
- // who cares.
- eax = 64 * 1024;
- ret = 0;
- break;
- case 0x15:
- ret=handleint21( &edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
- break;
- default:
- printk(BIOS_INFO, "BIOSINT: Unsupport int #0x%lx\n", intnumber);
- break;
- }
- if (ret)
- flags |= 1; // carry flags
- else
- flags &= ~1;
- stackflags = flags;
- return ret;
-}
-
-
-void setup_realmode_idt(void)
-{
- extern unsigned char idthandle, end_idthandle;
- extern unsigned char debughandle, end_debughandle;
-
- int i;
- struct realidt *idts = (struct realidt *) 0;
- int codesize = &end_idthandle - &idthandle;
- unsigned char *intbyte, *codeptr;
-
- // for each int, we create a customized little handler
- // that just pushes %ax, puts the int # in %al,
- // then calls the common interrupt handler.
- // this necessitated because intel didn't know much about
- // architecture when they did the 8086 (it shows)
- // (hmm do they know anymore even now :-)
- // obviously you can see I don't really care about memory
- // efficiency. If I did I would probe back through the stack
- // and get it that way. But that's really disgusting.
- for (i = 0; i < 256; i++) {
- idts[i].cs = 0;
- codeptr = (unsigned char*) 4096 + i * codesize;
- idts[i].offset = (unsigned) codeptr;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = i;
- }
-
- // fixed entry points
-
- // VGA BIOSes tend to hardcode f000:f065 as the previous handler of
- // int10.
- // calling convention here is the same as INTs, we can reuse
- // the int entry code.
- codeptr = (unsigned char*) 0xff065;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = 0x42; /* int42 is the relocated int10 */
-
- /* debug handler - useful to set a programmable delay between instructions if the
- TF bit is set upon call to real mode */
- idts[1].cs = 0;
- idts[1].offset = 16384;
- memcpy((void *)16384, &debughandle, &end_debughandle - &debughandle);
-
-
-}
-
-
-
-enum {
- CHECK = 0xb001,
- FINDDEV = 0xb102,
- READCONFBYTE = 0xb108,
- READCONFWORD = 0xb109,
- READCONFDWORD = 0xb10a,
- WRITECONFBYTE = 0xb10b,
- WRITECONFWORD = 0xb10c,
- WRITECONFDWORD = 0xb10d
-};
-
-// errors go in AH. Just set these up so that word assigns
-// will work. KISS.
-enum {
- PCIBIOS_NODEV = 0x8600,
- PCIBIOS_BADREG = 0x8700
-};
-
-int
-pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags)
-{
- unsigned short func = (unsigned short) (*peax);
- int retval = 0;
- unsigned short devid, vendorid, devfn;
- short devindex; /* Use short to get rid of garbage in upper half of 32-bit register */
- unsigned char bus;
- device_t dev;
-
- switch(func) {
- case CHECK:
- *pedx = 0x4350;
- *pecx = 0x2049;
- retval = 0;
- break;
- case FINDDEV:
- {
- devid = *pecx;
- vendorid = *pedx;
- devindex = *pesi;
- dev = 0;
- while ((dev = dev_find_device(vendorid, devid, dev))) {
- if (devindex <= 0)
- break;
- devindex--;
- }
- if (dev) {
- unsigned short busdevfn;
- *peax = 0;
- // busnum is an unsigned char;
- // devfn is an int, so we mask it off.
- busdevfn = (dev->bus->secondary << 8)
- | (dev->path.pci.devfn & 0xff);
- printk(BIOS_DEBUG, "0x%x: return 0x%x\n", func, busdevfn);
- *pebx = busdevfn;
- retval = 0;
- } else {
- *peax = PCIBIOS_NODEV;
- retval = -1;
- }
- }
- break;
- case READCONFDWORD:
- case READCONFWORD:
- case READCONFBYTE:
- case WRITECONFDWORD:
- case WRITECONFWORD:
- case WRITECONFBYTE:
- {
- unsigned long dword;
- unsigned short word;
- unsigned char byte;
- unsigned char reg;
-
- devfn = *pebx & 0xff;
- bus = *pebx >> 8;
- reg = *pedi;
- dev = dev_find_slot(bus, devfn);
- if (! dev) {
- printk(BIOS_DEBUG, "0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn);
- // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn!
- *peax = PCIBIOS_BADREG;
- retval = -1;
- }
- switch(func) {
- case READCONFBYTE:
- byte = pci_read_config8(dev, reg);
- *pecx = byte;
- break;
- case READCONFWORD:
- word = pci_read_config16(dev, reg);
- *pecx = word;
- break;
- case READCONFDWORD:
- dword = pci_read_config32(dev, reg);
- *pecx = dword;
- break;
- case WRITECONFBYTE:
- byte = *pecx;
- pci_write_config8(dev, reg, byte);
- break;
- case WRITECONFWORD:
- word = *pecx;
- pci_write_config16(dev, reg, word);
- break;
- case WRITECONFDWORD:
- dword = *pecx;
- pci_write_config32(dev, reg, dword);
- break;
- }
-
- if (retval)
- retval = PCIBIOS_BADREG;
- printk(BIOS_DEBUG, "0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
- func, bus, devfn, reg, *pecx);
- *peax = 0;
- retval = 0;
- }
- break;
- default:
- printk(BIOS_ERR, "UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func);
- break;
- }
-
- return retval;
-}
-
-int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp,
- unsigned long *esp, unsigned long *ebx, unsigned long *edx,
- unsigned long *ecx, unsigned long *eax, unsigned long *flags)
-{
- int res=-1;
- switch(*eax&0xffff)
- {
- case 0x5f19:
- break;
- case 0x5f18:
- *eax=0x5f;
- *ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
- *ecx=0x060;
- res=0;
- break;
- case 0x5f00:
- *eax = 0x8600;
- break;
- case 0x5f01:
- *eax = 0x5f;
- *ecx = (*ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
- res = 0;
- break;
- case 0x5f02:
- *eax=0x5f;
- *ebx= (*ebx & 0xffff0000) | 2;
- *ecx= (*ecx & 0xffff0000) | 0x401; // PAL + crt only
- *edx= (*edx & 0xffff0000) | 0; // TV Layout - default
- res=0;
- break;
- case 0x5f0f:
- *eax=0x860f;
- break;
- }
- return res;
-}
+++ /dev/null
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef _PC80_VGABIOS
-#define _PC80_VGABIOS
-
-extern struct chip_control pc80_vgabios_control;
-
-struct pc80_vgabios_config {
- int nothing;
-};
-
-void vga_enable_console(void);
-void do_vgabios(void);
-void setup_realmode_idt(void);
-void write_protect_vgabios(void);
-
-#endif /* _PC80_VGABIOS */
select IOAPIC
select SMP
-# this is done by the northbridge's vgabios.c already
-config VGA_ROM_RUN
- bool
- default n
+# TODO: What should be the per-chipset default value here?
+choice
+ prompt "Onboard graphics"
+ default CX700_VIDEO_MB_32MB
depends on NORTHBRIDGE_VIA_CX700
-config PCI_ROM_RUN
- bool
- default n
+# TODO: Setting the amount of gfx memory is not yet supported in the source code.
+config CX700_VIDEO_MB_OFF
+ bool "Disabled, 0KB"
+config CX700_VIDEO_MB_8MB
+ bool "Enabled, 8MB"
+config CX700_VIDEO_MB_16MB
+ bool "Enabled, 16MB"
+config CX700_VIDEO_MB_32MB
+ bool "Enabled, 32MB"
+config CX700_VIDEO_MB_64MB
+ bool "Enabled, 64MB"
+config CX700_VIDEO_MB_128MB
+ bool "Enabled, 128MB"
+
+endchoice
+
+config VIDEO_MB
+ int
+ default 0 if CX700_VIDEO_MB_OFF
+ default 8 if CX700_VIDEO_MB_8MB
+ default 16 if CX700_VIDEO_MB_16MB
+ default 32 if CX700_VIDEO_MB_32MB
+ default 64 if CX700_VIDEO_MB_64MB
+ default 128 if CX700_VIDEO_MB_128MB
depends on NORTHBRIDGE_VIA_CX700
obj-y += cx700_reset.o
obj-y += northbridge.o
-obj-y += vgabios.o
driver-y += cx700_agp.o
driver-y += cx700_lpc.o
#include <cpu/cpu.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/msr.h>
+#include <arch/interrupt.h>
#include "chip.h"
#include "northbridge.h"
#define CRTC_INDEX 0x3d4
#define CRTC_DATA 0x3d5
-void setup_realmode_idt(void);
-void do_vgabios(void);
-void vga_enable_console(void);
+static int via_cx700_int15_handler(struct eregs *regs)
+{
+ int res=-1;
+ printk(BIOS_DEBUG, "via_cx700_int15_handler\n");
+ switch(regs->eax & 0xffff) {
+ case 0x5f19:
+ break;
+ case 0x5f18:
+ regs->eax=0x5f;
+ regs->ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
+ regs->ecx=0x060;
+ res=0;
+ break;
+ case 0x5f00:
+ regs->eax = 0x8600;
+ break;
+ case 0x5f01:
+ regs->eax = 0x5f;
+ regs->ecx = (regs->ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
+ res = 0;
+ break;
+ case 0x5f02:
+ regs->eax=0x5f;
+ regs->ebx= (regs->ebx & 0xffff0000) | 2;
+ regs->ecx= (regs->ecx & 0xffff0000) | 0x401; // PAL + crt only
+ regs->edx= (regs->edx & 0xffff0000) | 0; // TV Layout - default
+ res=0;
+ break;
+ case 0x5f0f:
+ regs->eax=0x860f;
+ break;
+ default:
+ printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
+ regs->eax & 0xffff);
+ break;
+ }
+ return res;
+}
void write_protect_vgabios(void)
{
{
u8 reg8;
- printk(BIOS_DEBUG, "Initializing VGA...\n");
+ mainboard_interrupt_handlers(0x15, &via_cx700_int15_handler);
//*
pci_write_config8(dev, 0x04, 0x07);
pci_write_config8(dev, 0x3c, 0x0b);
//*/
- printk(BIOS_DEBUG, "Executing VGA option rom in real mode\n");
- setup_realmode_idt();
- do_vgabios();
+ printk(BIOS_DEBUG, "Initializing VGA...\n");
+
+ pci_dev_init(dev);
+
printk(BIOS_DEBUG, "Enable VGA console\n");
+ // this is how it should look:
+ // call_bios_interrupt(0x10,0x4f1f,0x8003,1,0);
+ // this is how it looks:
vga_enable_console();
-
+
/* It's not clear if these need to be programmed before or after
* the VGA bios runs. Try both, clean up later */
/* Set memory rate to 200MHz */
+++ /dev/null
-/*
- * This file is part of the coreboot project.
- *
- * (C) 2007-2009 coresystems GmbH
- * (See further copyright notices below)
- *
- * NOTE: This file is supposed to go away once the generic vm86 handler
- * in util/x86emu is able to handle intXX hooks like yabel does.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <console/console.h>
-#include <device/pci.h>
-#include <device/pci_ids.h>
-#include <device/pci_ops.h>
-#undef __KERNEL__
-#include <arch/io.h>
-#include <string.h>
-#include <cbfs.h>
-
-void write_protect_vgabios(void);
-
-/* vgabios.c. Derived from: */
-
-/*------------------------------------------------------------ -*- C -*-
- * 2 Kernel Monte a.k.a. Linux loading Linux on x86
- *
- * Erik Arjan Hendriks <hendriks@lanl.gov>
- *
- * This version is a derivative of the original two kernel monte
- * which is (C) 2000 Scyld.
- *
- * Copyright (C) 2000 Scyld Computing Corporation
- *
- * Portions related to the alpha architecture are:
- *
- * Copyright(C) 2001 University of California. LA-CC Number 01-67.
- * This software has been authored by an employee or employees of the
- * University of California, operator of the Los Alamos National
- * Laboratory under Contract No. W-7405-ENG-36 with the U.S.
- * Department of Energy. The U.S. Government has rights to use,
- * reproduce, and distribute this software. If the software is
- * modified to produce derivative works, such modified software should
- * be clearly marked, so as not to confuse it with the version
- * available from LANL.
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by
- * reference to http://www.gnu.org/licenses/gpl.html.
- *
- * This software is provided by the author(s) "as is" and any express
- * or implied warranties, including, but not limited to, the implied
- * warranties of merchantability and fitness for a particular purpose
- * are disclaimed. In no event shall the author(s) be liable for any
- * direct, indirect, incidental, special, exemplary, or consequential
- * damages (including, but not limited to, procurement of substitute
- * goods or services; loss of use, data, or profits; or business
- * interruption) however caused and on any theory of liability,
- * whether in contract, strict liability, or tort (including
- * negligence or otherwise) arising in any way out of the use of this
- * software, even if advised of the possibility of such damage.
- *
- *--------------------------------------------------------------------*/
-
-/* Modified to be a self sufficient plug in so that it can be used
- without reliance on other parts of core Linuxbios
- (C) 2005 Nick.Barker9@btinternet.com
-
- Used initially for epia-m where there are problems getting the bios
- emulator to successfully run this bios.
-*/
-
-/* Declare a temporary global descriptor table - necessary because the
- Core part of the bios no longer sets up any 16 bit segments */
-__asm__(
- /* pointer to original gdt */
- "gdtarg: \n"
- " .word gdt_limit \n"
- " .long gdt \n"
- /* compute the table limit */
- "__mygdt_limit = __mygdt_end - __mygdt - 1 \n"
- "__mygdtaddr: \n"
- " .word __mygdt_limit \n"
- " .long __mygdt \n"
- "__mygdt: \n"
- /* selgdt 0, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
- /* selgdt 8, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
- /* selgdt 0x10, flat code segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x9b, 0xcf, 0x00 \n"
- /* selgdt 0x18, flat data segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x93, 0xcf, 0x00 \n"
- /* selgdt 0x20, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
- /* selgdt 0x28 16-bit 64k code at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x9a, 0, 0 \n"
- /* selgdt 0x30 16-bit 64k data at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x92, 0, 0 \n"
- "__mygdt_end: \n");
-
-/* Declare a pointer to where our idt is going to be i.e. at mem zero */
-__asm__("__myidt: \n"
- /* 16-bit limit */
- " .word 1023 \n"
- /* 24-bit base */
- " .long 0 \n" " .word 0 \n");
-
-/* The address arguments to this function are PHYSICAL ADDRESSES */
-static void real_mode_switch_call_vga(unsigned long devfn)
-{
- __asm__ __volatile__(
- // paranoia -- does ecx get saved? not sure. This is
- // the easiest safe thing to do.
- " pushal \n"
- /* save the stack */
- " mov %esp, __stack \n"
- " jmp 1f \n"
- "__stack: .long 0 \n" "1:\n"
- /* get devfn into %ecx */
- " movl %esp, %ebp \n"
- " movl 8(%ebp), %ecx \n"
- /* load 'our' gdt */
- " lgdt %cs:__mygdtaddr \n"
- /* This configures CS properly for real mode. */
- " ljmp $0x28, $__rms_16bit\n"
- "__rms_16bit: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax \n"
- " movl %eax, %cr0 \n"
- /* Now really going into real mode */
- " ljmp $0, $__rms_real\n"
- "__rms_real: \n"
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case.
- */
- /* Setup a stack */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- " movl $0x1000, %eax \n"
- " movl %eax, %esp \n"
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
- /* Dump zeros in the other segregs */
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov $0x40, %ax \n"
- " mov %ax, %ds \n"
- " mov %cx, %ax \n"
- /* run VGA BIOS at 0xc000:0003 */
- " lcall $0xc000, $0x0003\n"
- /* if we got here, just about done.
- * Need to get back to protected mode */
- " movl %cr0, %eax \n" " orl $0x0000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0 \n"
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $vgarestart\n"
- "vgarestart:\n"
- " .code32\n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- /* restore proper gdt and idt */
- " lgdt %cs:gdtarg \n"
- " lidt idtarg \n"
- ".globl vga_exit \n"
- "vga_exit: \n"
- " mov __stack, %esp \n"
- " popal \n");
-}
-
-__asm__(".text\n" "real_mode_switch_end:\n");
-extern char real_mode_switch_end[];
-
-/* call vga bios int 10 function 0x4f14 to enable main console
- epia-m does not always autosence the main console so forcing it on is good !! */
-void vga_enable_console(void)
-{
- __asm__ __volatile__(
- /* paranoia -- does ecx get saved? not sure. This is
- * the easiest safe thing to do. */
- " pushal \n"
- /* save the stack */
- " mov %esp, __stack \n"
- /* load 'our' gdt */
- " lgdt %cs:__mygdtaddr \n"
- /* This configures CS properly for real mode. */
- " ljmp $0x28, $__vga_ec_16bit\n"
- "__vga_ec_16bit: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax\n"
- " movl %eax, %cr0 \n"
- /* Now really going into real mode */
- " ljmp $0, $__vga_ec_real \n"
- "__vga_ec_real: \n"
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case.
- */
- /* Setup a stack */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- " movl $0x1000, %eax \n"
- " movl %eax, %esp \n"
- /* debugging for RGM */
- " mov $0x11, %al \n"
- " outb %al, $0x80 \n"
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
- /* Dump zeros in the other segregs */
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- /* ask bios to enable main console */
- /* set up for int 10 call - values found from X server
- * bios call routines */
- " movw $0x4f14,%ax \n"
- " movw $0x8003,%bx \n"
- " movw $1, %cx \n"
- " movw $0, %dx \n"
- " movw $0, %di \n"
- " int $0x10 \n"
- " movb $0x55, %al \n"
- " outb %al, $0x80 \n"
- /* if we got here, just about done.
- * Need to get back to protected mode */
- " movl %cr0, %eax \n" " orl $0x0000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0 \n"
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $vga_ec_restart\n"
- "vga_ec_restart:\n"
- " .code32\n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- /* restore proper gdt and idt */
- " lgdt %cs:gdtarg \n"
- " lidt idtarg \n"
- " .globl vga__ec_exit \n"
- "vga_ec_exit:\n"
- " mov __stack, %esp \n"
- " popal\n");
-}
-
-void do_vgabios(void)
-{
- device_t dev;
- unsigned long busdevfn;
- unsigned int rom = 0;
- unsigned char *buf;
- unsigned int size = 64 * 1024;
- int i;
-
- /* clear vga bios data area */
- for (i = 0x400; i < 0x500; i++) {
- *(unsigned char *)i = 0;
- }
-
- dev = dev_find_class(PCI_CLASS_DISPLAY_VGA << 8, 0);
-
- if (!dev) {
- printk(BIOS_DEBUG, "NO VGA FOUND\n");
- return;
- }
- printk(BIOS_DEBUG, "found VGA: vid=%x, did=%x\n", dev->vendor, dev->device);
-
- /* declare rom address here - keep any config data out of the way
- * of core LXB stuff */
-
-#warning ROM address hardcoded to 512K
- rom = (unsigned int)cbfs_load_optionrom(dev->vendor, dev->device, 0);
- pci_write_config32(dev, PCI_ROM_ADDRESS, rom | 1);
- printk(BIOS_DEBUG, "rom base, size: %x\n", rom);
-
- buf = (unsigned char *)rom;
- if ((buf[0] == 0x55) && (buf[1] == 0xaa)) {
- memcpy((void *)0xc0000, buf, size);
-
- write_protect_vgabios(); // in northbridge
-
- // check signature again
- buf = (unsigned char *)0xc0000;
- if (buf[0] == 0x55 && buf[1] == 0xAA) {
- busdevfn =
- (dev->bus->secondary << 8) | dev->path.pci.devfn;
- printk(BIOS_DEBUG, "bus/devfn = %#lx\n", busdevfn);
-
- real_mode_switch_call_vga(busdevfn);
- } else
- printk(BIOS_DEBUG, "Failed to copy VGA BIOS to 0xc0000\n");
- } else
- printk(BIOS_DEBUG, "BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]);
-
- pci_write_config32(dev, PCI_ROM_ADDRESS, 0);
-}
-
-// we had hoped to avoid this.
-// this is a stub IDT only. It's main purpose is to ignore calls
-// to the BIOS.
-// no longer. Dammit. We have to respond to these.
-struct realidt {
- unsigned short offset, cs;
-};
-
-// from a handy writeup that andrey found.
-
-// handler.
-// There are some assumptions we can make here.
-// First, the Top Of Stack (TOS) is located on the top of page zero.
-// we can share this stack between real and protected mode.
-// that simplifies a lot of things ...
-// we'll just push all the registers on the stack as longwords,
-// and pop to protected mode.
-// second, since this only ever runs as part of linuxbios,
-// we know all the segment register values -- so we don't save any.
-// keep the handler that calls things small. It can do a call to
-// more complex code in linuxbios itself. This helps a lot as we don't
-// have to do address fixup in this little stub, and calls are absolute
-// so the handler is relocatable.
-void handler(void)
-{
- __asm__ __volatile__(" .code16 \n"
- "idthandle: \n"
- " pushal \n"
- " movb $0, %al \n"
- " ljmp $0, $callbiosint16\n"
- "end_idthandle: \n"
- " .code32 \n");
-}
-
-void debughandler(void)
-{
- __asm__ __volatile__(" .code16 \n"
- "debughandle: \n"
- " pushw %cx \n"
- " movw $250, %cx \n"
- "dbh1: \n"
- " loop dbh1 \n"
- " popw %cx \n"
- " iret \n"
- "end_debughandle: \n" ".code32 \n");
-}
-
-// Calling conventions. The first C function is called with this stuff
-// on the stack. They look like value parameters, but note that if you
-// modify them they will go back to the INTx function modified.
-// the C function will call the biosint function with these as
-// REFERENCE parameters. In this way, we can easily get
-// returns back to the INTx caller (i.e. vgabios)
-void callbiosint(void)
-{
- __asm__ __volatile__(" .code16 \n"
- "callbiosint16: \n"
- " push %ds \n"
- " push %es \n"
- " push %fs \n" " push %gs \n"
- // clean up the int #. To save space we put it in the lower
- // byte. But the top 24 bits are junk.
- " andl $0xff, %eax\n"
- // this push does two things:
- // - put the INT # on the stack as a parameter
- // - provides us with a temp for the %cr0 mods.
- " pushl %eax \n" " movl %cr0, %eax\n" " orl $0x00000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0\n"
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $biosprotect\n"
- "biosprotect: \n"
- " .code32 \n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- " lidt idtarg \n"
- " call biosint \n"
- // back to real mode ...
- " ljmp $0x28, $__rms_16bit2\n"
- "__rms_16bit2: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax \n"
- " movl %eax, %cr0 \n"
- /* Now really going into real mode */
- " ljmp $0, $__rms_real2 \n"
- "__rms_real2: \n"
- /* Setup a stack
- * FixME: where is esp? */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- /* ebugging for RGM */
- " mov $0x11, %al \n"
- " outb %al, $0x80 \n"
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
- /* Dump zeros in the other segregs */
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov $0x40, %ax \n"
- " mov %ax, %ds \n"
- /* pop the INT # that you pushed earlier */
- " popl %eax \n"
- " pop %gs \n"
- " pop %fs \n"
- " pop %es \n"
- " pop %ds \n"
- " popal \n"
- " iret \n"
- " .code32 \n");
-}
-
-enum {
- PCIBIOS = 0x1a,
- MEMSIZE = 0x12
-};
-
-int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags);
-
-int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax,
- unsigned long *pflags);
-
-extern void vga_exit(void);
-
-int biosint(unsigned long intnumber,
- unsigned long gsfs, unsigned long dses,
- unsigned long edi, unsigned long esi,
- unsigned long ebp, unsigned long esp,
- unsigned long ebx, unsigned long edx,
- unsigned long ecx, unsigned long eax,
- unsigned long cs_ip, unsigned short stackflags)
-{
- unsigned long ip;
- unsigned long cs;
- unsigned long flags;
- int ret = -1;
-
- ip = cs_ip & 0xffff;
- cs = cs_ip >> 16;
- flags = stackflags;
-
- printk(BIOS_DEBUG, "biosint: INT# 0x%lx\n", intnumber);
- printk(BIOS_DEBUG, "biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n",
- eax, ebx, ecx, edx);
- printk(BIOS_DEBUG, "biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n",
- ebp, esp, edi, esi);
- printk(BIOS_DEBUG, "biosint: ip 0x%lx cs 0x%lx flags 0x%lx\n",
- ip, cs, flags);
-
- // cases in a good compiler are just as good as your own tables.
- switch (intnumber) {
- case 0 ... 15:
- // These are not BIOS service, but the CPU-generated exceptions
- printk(BIOS_INFO, "biosint: Oops, exception %lu\n", intnumber);
- if (esp < 0x1000) {
- printk(BIOS_DEBUG, "Stack contents: ");
- while (esp < 0x1000) {
- printk(BIOS_DEBUG, "0x%04x ", *(unsigned short *)esp);
- esp += 2;
- }
- printk(BIOS_DEBUG, "\n");
- }
- printk(BIOS_DEBUG, "biosint: Bailing out\n");
- // "longjmp"
- vga_exit();
- break;
-
- case PCIBIOS:
- ret = pcibios(&edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
- break;
- case MEMSIZE:
- // who cares.
- eax = 64 * 1024;
- ret = 0;
- break;
- case 0x15:
- ret = handleint21(&edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
- break;
- default:
- printk(BIOS_INFO, "BIOSINT: Unsupport int #0x%lx\n", intnumber);
- break;
- }
- if (ret)
- flags |= 1; // carry flags
- else
- flags &= ~1;
- stackflags = flags;
- return ret;
-}
-
-void setup_realmode_idt(void)
-{
- extern unsigned char idthandle, end_idthandle;
- extern unsigned char debughandle, end_debughandle;
-
- int i;
- struct realidt *idts = (struct realidt *)0;
- int codesize = &end_idthandle - &idthandle;
- unsigned char *intbyte, *codeptr;
-
- // for each int, we create a customized little handler
- // that just pushes %ax, puts the int # in %al,
- // then calls the common interrupt handler.
- // this necessitated because intel didn't know much about
- // architecture when they did the 8086 (it shows)
- // (hmm do they know anymore even now :-)
- // obviously you can see I don't really care about memory
- // efficiency. If I did I would probe back through the stack
- // and get it that way. But that's really disgusting.
- for (i = 0; i < 256; i++) {
- idts[i].cs = 0;
- codeptr = (unsigned char *)4096 + i * codesize;
- idts[i].offset = (unsigned)codeptr;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = i;
- }
-
- // fixed entry points
-
- // VGA BIOSes tend to hardcode f000:f065 as the previous handler of
- // int10.
- // calling convention here is the same as INTs, we can reuse
- // the int entry code.
- codeptr = (unsigned char *)0xff065;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = 0x42; /* int42 is the relocated int10 */
-
- // VIA's VBIOS will call f000:f859 instead of sending int15.
- codeptr = (unsigned char *)0xff859;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = 0x15;
-
- /* debug handler - useful to set a programmable delay between instructions if the
- TF bit is set upon call to real mode */
- idts[1].cs = 0;
- idts[1].offset = 16384;
- memcpy((void *)16384UL, &debughandle, &end_debughandle - &debughandle);
-}
-
-enum {
- CHECK = 0xb001,
- FINDDEV = 0xb102,
- READCONFBYTE = 0xb108,
- READCONFWORD = 0xb109,
- READCONFDWORD = 0xb10a,
- WRITECONFBYTE = 0xb10b,
- WRITECONFWORD = 0xb10c,
- WRITECONFDWORD = 0xb10d
-};
-
-// errors go in AH. Just set these up so that word assigns
-// will work. KISS.
-enum {
- PCIBIOS_NODEV = 0x8600,
- PCIBIOS_BADREG = 0x8700
-};
-
-int
-pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags)
-{
- unsigned short func = (unsigned short)(*peax);
- int retval = 0;
- unsigned short devid, vendorid, devfn;
- short devindex; /* Use short to get rid of garbage in upper half of 32-bit register */
- unsigned char bus;
- device_t dev;
-
- switch (func) {
- case CHECK:
- *pedx = 0x4350;
- *pecx = 0x2049;
- retval = 0;
- break;
- case FINDDEV:
- {
- devid = *pecx;
- vendorid = *pedx;
- devindex = *pesi;
- dev = 0;
- while ((dev = dev_find_device(vendorid, devid, dev))) {
- if (devindex <= 0)
- break;
- devindex--;
- }
- if (dev) {
- unsigned short busdevfn;
- *peax = 0;
- // busnum is an unsigned char;
- // devfn is an int, so we mask it off.
- busdevfn = (dev->bus->secondary << 8)
- | (dev->path.pci.devfn & 0xff);
- printk(BIOS_DEBUG, "0x%x: return 0x%x\n", func,
- busdevfn);
- *pebx = busdevfn;
- retval = 0;
- } else {
- *peax = PCIBIOS_NODEV;
- retval = -1;
- }
- }
- break;
- case READCONFDWORD:
- case READCONFWORD:
- case READCONFBYTE:
- case WRITECONFDWORD:
- case WRITECONFWORD:
- case WRITECONFBYTE:
- {
- unsigned long dword;
- unsigned short word;
- unsigned char byte;
- unsigned char reg;
-
- devfn = *pebx & 0xff;
- bus = *pebx >> 8;
- reg = *pedi;
- dev = dev_find_slot(bus, devfn);
- if (!dev) {
- printk(BIOS_DEBUG, "0x%x: BAD DEVICE bus %d devfn 0x%x\n",
- func, bus, devfn);
- // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn!
- *peax = PCIBIOS_BADREG;
- retval = -1;
- }
- switch (func) {
- case READCONFBYTE:
- byte = pci_read_config8(dev, reg);
- *pecx = byte;
- break;
- case READCONFWORD:
- word = pci_read_config16(dev, reg);
- *pecx = word;
- break;
- case READCONFDWORD:
- dword = pci_read_config32(dev, reg);
- *pecx = dword;
- break;
- case WRITECONFBYTE:
- byte = *pecx;
- pci_write_config8(dev, reg, byte);
- break;
- case WRITECONFWORD:
- word = *pecx;
- pci_write_config16(dev, reg, word);
- break;
- case WRITECONFDWORD:
- dword = *pecx;
- pci_write_config32(dev, reg, dword);
- break;
- }
-
- if (retval)
- retval = PCIBIOS_BADREG;
- printk(BIOS_DEBUG, "0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
- func, bus, devfn, reg, *pecx);
- *peax = 0;
- retval = 0;
- }
- break;
- default:
- printk(BIOS_ERR, "UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func);
- break;
- }
-
- return retval;
-}
-
-int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp,
- unsigned long *esp, unsigned long *ebx, unsigned long *edx,
- unsigned long *ecx, unsigned long *eax, unsigned long *flags)
-{
- int res = -1;
- switch (*eax & 0xffff) {
- case 0x5f19:
- break;
- case 0x5f18:
- *eax = 0x5f;
- *ebx = 0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
- *ecx = 0x060;
- res = 0;
- break;
- case 0x5f00:
- *eax = 0x8600;
- break;
- case 0x5f01:
- *eax = 0x5f;
- *ecx = (*ecx & 0xffffff00) | 2; // panel type = 2 = 1024 * 768
- res = 0;
- break;
- case 0x5f02:
- *eax = 0x5f;
- *ebx = (*ebx & 0xffff0000) | 2;
- *ecx = (*ecx & 0xffff0000) | 0x401; // PAL + crt only
- *edx = (*edx & 0xffff0000) | 0; // TV Layout - default
- res = 0;
- break;
- case 0x5f0f:
- *eax = 0x860f;
- break;
- }
- return res;
-}
default 0
depends on NORTHBRIDGE_VIA_VX800
-# this is done by the northbridge's vgabios.c already
-config VGA_ROM_RUN
- bool
- default n
- depends on NORTHBRIDGE_VIA_VX800
-
-config PCI_ROM_RUN
- bool
- default n
- depends on NORTHBRIDGE_VIA_VX800
-
## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##
-obj-y += vgabios.o
-
driver-y += northbridge.o
driver-y += vga.o
driver-y += vx800_lpc.o
#include <cpu/cpu.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/msr.h>
+#include <arch/interrupt.h>
#include "chip.h"
#include "northbridge.h"
-#include "vgachip.h"
/* PCI Domain 1 Device 0 Function 0 */
#define VIACONFIG_VGA_PCI_10 0xf8000008
#define VIACONFIG_VGA_PCI_14 0xfc000000
+static int via_vx800_int15_handler(struct eregs *regs)
+{
+ int res=-1;
+ printk(BIOS_DEBUG, "via_vx800_int15_handler\n");
+ switch(regs->eax & 0xffff) {
+ case 0x5f19:
+ regs->eax=0x5f;
+ regs->ecx=0x03;
+ res=0;
+ break;
+ case 0x5f18:
+ {
+ /*
+ * BL Bit[7:4]
+ * Memory Data Rate
+ * 0000: 66MHz
+ * 0001: 100MHz
+ * 0010: 133MHz
+ * 0011: 200MHz ( DDR200 )
+ * 0100: 266MHz ( DDR266 )
+ * 0101: 333MHz ( DDR333 )
+ * 0110: 400MHz ( DDR400 )
+ * 0111: 533MHz ( DDR I/II 533
+ * 1000: 667MHz ( DDR I/II 667)
+ * Bit[3:0]
+ * N: Frame Buffer Size 2^N MB
+ */
+ u8 i;
+ device_t dev;
+ dev = dev_find_slot(0, PCI_DEVFN(0, 3));
+ i = pci_read_config8(dev, 0xa1);
+ i = (i & 0x70);
+ i = i >> 4;
+ if (i == 0) {
+ regs->eax = 0x00; //not support 5f18
+ break;
+ }
+ i = i + 2;
+ regs->ebx = (u32) i;
+ i = pci_read_config8(dev, 0x90);
+ i = (i & 0x07);
+ i = i + 3;
+ i = i << 4;
+ regs->ebx = regs->ebx + ((u32) i);
+ regs->eax = 0x5f;
+ res = 0;
+ break;
+ }
+ case 0x5f00:
+ regs->eax = 0x005f;
+ res = 0;
+ break;
+ case 0x5f01:
+ regs->eax = 0x5f;
+ regs->ecx = (regs->ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
+ res = 0;
+ break;
+ case 0x5f02:
+ regs->eax=0x5f;
+ regs->ebx= (regs->ebx & 0xffff0000) | 2;
+ regs->ecx= (regs->ecx & 0xffff0000) | 0x401; // PAL + crt only
+ regs->edx= (regs->edx & 0xffff0000) | 0; // TV Layout - default
+ res=0;
+ break;
+ case 0x5f0f:
+ regs->eax = 0x005f;
+ res = 0;
+ break;
+ default:
+ printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
+ regs->eax & 0xffff);
+ regs->eax = 0;
+ break;
+ }
+ return res;
+}
+
void write_protect_vgabios(void)
{
device_t dev;
{
uint8_t reg8;
- print_debug("Initiailizing VGA...\n");
- u8 tmp8;
-//A20 OPEN
- tmp8 = inb(0x92);
- tmp8 = tmp8 | 2;
- outb(tmp8, 0x92);
+ mainboard_interrupt_handlers(0x15, &via_vx800_int15_handler);
+
+ //A20 OPEN
+ reg8 = inb(0x92);
+ reg8 = reg8 | 2;
+ outb(reg8, 0x92);
//*
//pci_write_config8(dev, 0x04, 0x07);
pci_write_config32(dev, 0x14, VIACONFIG_VGA_PCI_14);
pci_write_config8(dev, 0x3c, 0x0a); //same with vx855_lpc.c
//*/
- printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__);
-#if 1
- printk(BIOS_DEBUG, "INSTALL REAL-MODE IDT\n");
- setup_realmode_idt();
- printk(BIOS_DEBUG, "DO THE VGA BIOS\n");
+ printk(BIOS_DEBUG, "Initializing VGA...\n");
+
+ pci_dev_init(dev);
+
+ printk(BIOS_DEBUG, "Enable VGA console\n");
+ // this is how it should look:
+ // call_bios_interrupt(0x10,0x4f1f,0x8003,1,0);
+ // this is how it looks:
+ vga_enable_console();
- do_vgabios();
- if ((acpi_sleep_type == 3)/* || (PAYLOAD_IS_SEABIOS == 0)*/) {
- printk(BIOS_DEBUG, "Enable VGA console\n");
- // remove this function since in cn700 it is said "VGA seems to work without this, but crash & burn with it"
- //but the existense of vga_enable_console() seems do not hurt my coreboot. XP+ubuntu s3 can resume with and without this function.
- //and remove it also do not help my s3 problem: desktop screen have some thin black line, after resuming back to win.
- vga_enable_console();
- }
-#else
-/* Attempt to manually force the rom to load */
- printk(BIOS_DEBUG, "Forcing rom load\n");
- pci_rom_load(dev, 0xfff80000);
- run_bios(dev, 0xc0000);
-#endif
if ((acpi_sleep_type == 3)/* || (PAYLOAD_IS_SEABIOS == 0)*/) {
/* It's not clear if these need to be programmed before or after
* the VGA bios runs. Try both, clean up later */
outb(0x3d, CRTM_INDEX);
outb(reg8, CRTM_DATA);
+#if 0
/* Set framebuffer size to CONFIG_VIDEO_MB mb */
- /*reg8 = (CONFIG_VIDEO_MB/4);
- outb(0x39, SR_INDEX);
- outb(reg8, SR_DATA); */
+ reg8 = (CONFIG_VIDEO_MB/4);
+ outb(0x39, SR_INDEX);
+ outb(reg8, SR_DATA);
+#endif
}
- printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__);
-
}
static struct device_operations vga_operations = {
+++ /dev/null
-#include <console/console.h>
-#include <device/pci.h>
-#include <device/pci_ids.h>
-#include <device/pci_ops.h>
-#undef __KERNEL__
-#include <arch/io.h>
-#include <string.h>
-#include "vgachip.h"
-#include <cbfs.h>
-
-/* vgabios.c. Derived from: */
-
-/*------------------------------------------------------------ -*- C -*-
- * 2 Kernel Monte a.k.a. Linux loading Linux on x86
- *
- * Erik Arjan Hendriks <hendriks@lanl.gov>
- *
- * This version is a derivative of the original two kernel monte
- * which is (C) 2000 Scyld.
- *
- * Copyright (C) 2000 Scyld Computing Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * Portions related to the alpha architecture are:
- *
- * Copyright(C) 2001 University of California. LA-CC Number 01-67.
- * This software has been authored by an employee or employees of the
- * University of California, operator of the Los Alamos National
- * Laboratory under Contract No. W-7405-ENG-36 with the U.S.
- * Department of Energy. The U.S. Government has rights to use,
- * reproduce, and distribute this software. If the software is
- * modified to produce derivative works, such modified software should
- * be clearly marked, so as not to confuse it with the version
- * available from LANL.
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by
- * reference to http://www.gnu.org/licenses/gpl.html.
- *
- * This software is provided by the author(s) "as is" and any express
- * or implied warranties, including, but not limited to, the implied
- * warranties of merchantability and fitness for a particular purpose
- * are disclaimed. In no event shall the author(s) be liable for any
- * direct, indirect, incidental, special, exemplary, or consequential
- * damages (including, but not limited to, procurement of substitute
- * goods or services; loss of use, data, or profits; or business
- * interruption) however caused and on any theory of liability,
- * whether in contract, strict liability, or tort (including
- * negligence or otherwise) arising in any way out of the use of this
- * software, even if advised of the possibility of such damage.
- *
- * $Id: vgabios.c,v 1.5 2004/10/06 17:33:52 rminnich Exp $
- *--------------------------------------------------------------------*/
-
-/* Modified to be a self sufficient plug in so that it can be used
- without reliance on other parts of coreboot's core
- (C) 2005 Nick.Barker9@btinternet.com
-
- Used initially for epia-m where there are problems getting the bios
- emulator to successfully run this bios.
-*/
-/* Declare a temporary global descriptor table - necessary because the
- Core part of the bios no longer sets up any 16 bit segments */
-__asm__(
- /* pointer to original gdt */
- "gdtarg: \n"
- " .word gdt_limit \n"
- " .long gdt \n"
- /* compute the table limit */
- "__mygdt_limit = __mygdt_end - __mygdt - 1 \n"
- "__mygdtaddr: \n"
- " .word __mygdt_limit \n"
- " .long __mygdt \n"
- "__mygdt: \n"
- /* selgdt 0, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
- /* selgdt 8, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
- /* selgdt 0x10, flat code segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x9b, 0xcf, 0x00 \n"
- /* selgdt 0x18, flat data segment */
- " .word 0xffff, 0x0000 \n"
- " .byte 0x00, 0x93, 0xcf, 0x00 \n"
- /* selgdt 0x20, unused */
- " .word 0x0000, 0x0000 \n"
- " .byte 0x00, 0x00, 0x00, 0x00 \n"
- /* selgdt 0x28 16-bit 64k code at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x9a, 0, 0 \n"
- /* selgdt 0x30 16-bit 64k data at 0x00000000 */
- " .word 0xffff, 0x0000 \n"
- " .byte 0, 0x92, 0, 0 \n"
- "__mygdt_end: \n");
-
-/* Declare a pointer to where our idt is going to be i.e. at mem zero */
-__asm__("__myidt: \n"
- /* 16-bit limit */
- " .word 1023 \n"
- /* 24-bit base */
- " .long 0 \n" " .word 0 \n");
-
-/* The address arguments to this function are PHYSICAL ADDRESSES */
-extern u8 acpi_sleep_type;
-
-static void real_mode_switch_call_vga(unsigned long devfn)
-{
- if ((acpi_sleep_type == 0)/* && (PAYLOAD_IS_SEABIOS == 1)*/)
- return;
- __asm__ __volatile__(
- // paranoia -- does ecx get saved? not sure. This is
- // the easiest safe thing to do.
- " pushal \n"
- /* save the stack */
- " mov %esp, __stack \n"
- " jmp 1f \n"
- "__stack: .long 0 \n" "1:\n"
- /* get devfn into %ecx */
- " movl %esp, %ebp \n"
- " movl 8(%ebp), %ecx \n"
- /* load 'our' gdt */
- " lgdt %cs:__mygdtaddr \n"
- /* This configures CS properly for real mode. */
- " ljmp $0x28, $__rms_16bit\n"
- "__rms_16bit: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax \n"
- " movl %eax, %cr0 \n"
- /* Now really going into real mode */
- " ljmp $0, $__rms_real\n"
- "__rms_real: \n"
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case.
- */
- /* Setup a stack */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- " movl $0x1000, %eax \n"
- " movl %eax, %esp \n"
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
- /* Dump zeros in the other segregs */
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov $0x40, %ax \n"
- " mov %ax, %ds \n"
- " mov %cx, %ax \n"
- /* run VGA BIOS at 0xc000:0003 */
- " lcall $0xc000, $0x0003\n"
- /* if we got here, just about done.
- * Need to get back to protected mode */
- " movl %cr0, %eax \n" " orl $0x0000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0 \n"
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $vgarestart\n"
- "vgarestart:\n"
- " .code32\n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- /* restore proper gdt and idt */
- " lgdt %cs:gdtarg \n"
- " lidt idtarg \n"
- ".globl vga_exit \n"
- "vga_exit: \n"
- " mov __stack, %esp \n"
- " popal \n");
-}
-
-__asm__(".text\n" "real_mode_switch_end:\n");
-extern char real_mode_switch_end[];
-
-/* call vga bios int 10 function 0x4f14 to enable main console
- epia-m does not always autosence the main console so forcing it on is good !! */
-void vga_enable_console()
-{
- if ((acpi_sleep_type == 0)/* && (PAYLOAD_IS_SEABIOS == 1)*/)
- return;
- __asm__ __volatile__(
- /* paranoia -- does ecx get saved? not sure. This is
- * the easiest safe thing to do. */
- " pushal \n"
- /* save the stack */
- " mov %esp, __stack \n"
- /* load 'our' gdt */
- " lgdt %cs:__mygdtaddr \n"
- /* This configures CS properly for real mode. */
- " ljmp $0x28, $__vga_ec_16bit\n"
- "__vga_ec_16bit: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax\n"
- " movl %eax, %cr0 \n"
- /* Now really going into real mode */
- " ljmp $0, $__vga_ec_real \n"
- "__vga_ec_real: \n"
- /* put the stack at the end of page zero.
- * that way we can easily share it between real and protected,
- * since the 16-bit ESP at segment 0 will work for any case.
- */
- /* Setup a stack */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- " movl $0x1000, %eax \n"
- " movl %eax, %esp \n"
- /* debugging for RGM */
- " mov $0x11, %al \n"
- " outb %al, $0x80 \n"
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
- /* Dump zeros in the other segregs */
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- /* ask bios to enable main console */
- /* set up for int 10 call - values found from X server
- * bios call routines */
- " movw $0x4f14,%ax \n"
- " movw $0x8003,%bx \n"
- " movw $1, %cx \n"
- " movw $0, %dx \n"
- " movw $0, %di \n"
- " int $0x10 \n"
- " movb $0x55, %al \n"
- " outb %al, $0x80 \n"
- /* if we got here, just about done.
- * Need to get back to protected mode */
- " movl %cr0, %eax \n" " orl $0x0000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0 \n"
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $vga_ec_restart\n"
- "vga_ec_restart:\n"
- " .code32\n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- /* restore proper gdt and idt */
- " lgdt %cs:gdtarg \n"
- " lidt idtarg \n"
- " .globl vga__ec_exit \n"
- "vga_ec_exit:\n"
- " mov __stack, %esp \n"
- " popal\n");
-}
-
-void do_vgabios(void)
-{
- device_t dev;
- unsigned long busdevfn;
- u32 rom;
- unsigned char *buf;
- unsigned int size = 64 * 1024;
- int i;
-
- printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__);
-
- /* clear vga bios data area */
- for (i = 0x400; i < 0x500; i++) {
- *(unsigned char *)i = 0;
- }
-
- dev = dev_find_class(PCI_CLASS_DISPLAY_VGA << 8, 0);
-
- if (!dev) {
- printk(BIOS_DEBUG, "NO VGA FOUND\n");
- return;
- }
- printk(BIOS_DEBUG, "found VGA: vid=%x, did=%x\n", dev->vendor, dev->device);
-
- /* declare rom address here - keep any config data out of the way
- * of core LXB stuff */
-
- rom = (u32)cbfs_load_optionrom(dev->vendor, dev->device, 0);
- pci_write_config32(dev, PCI_ROM_ADDRESS, rom | 1);
- printk(BIOS_DEBUG, "rom base: %x\n", rom);
- buf = (unsigned char *)rom;
- printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__);
-
- if ((buf[0] == 0x55) && (buf[1] == 0xaa)) {
- memcpy((void *)0xc0000, buf, size);
-
- printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__);
-
- write_protect_vgabios(); // in northbridge
-
- // check signature again
- buf = (unsigned char *)0xc0000;
- if (buf[0] == 0x55 && buf[1] == 0xAA) {
- busdevfn =
- (dev->bus->secondary << 8) | dev->path.pci.devfn;
- printk(BIOS_DEBUG, "bus/devfn = %#lx\n", busdevfn);
- real_mode_switch_call_vga(busdevfn);
- } else
- printk(BIOS_DEBUG, "Failed to copy VGA BIOS to 0xc0000\n");
- } else
- printk(BIOS_DEBUG, "BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]);
-
- printk(BIOS_EMERG, "file '%s', line %d\n\n", __FILE__, __LINE__);
-
- pci_write_config32(dev, PCI_ROM_ADDRESS, 0);
-}
-
-// we had hoped to avoid this.
-// this is a stub IDT only. It's main purpose is to ignore calls
-// to the BIOS.
-// no longer. Dammit. We have to respond to these.
-struct realidt {
- unsigned short offset, cs;
-};
-
-// from a handy writeup that andrey found.
-
-// handler.
-// There are some assumptions we can make here.
-// First, the Top Of Stack (TOS) is located on the top of page zero.
-// we can share this stack between real and protected mode.
-// that simplifies a lot of things ...
-// we'll just push all the registers on the stack as longwords,
-// and pop to protected mode.
-// second, since this only ever runs as part of coreboot,
-// we know all the segment register values -- so we don't save any.
-// keep the handler that calls things small. It can do a call to
-// more complex code in coreboot itself. This helps a lot as we don't
-// have to do address fixup in this little stub, and calls are absolute
-// so the handler is relocatable.
-void handler(void)
-{
- __asm__ __volatile__(" .code16 \n"
- "idthandle: \n"
- " pushal \n"
- " movb $0, %al \n"
- " ljmp $0, $callbiosint16\n"
- "end_idthandle: \n"
- " .code32 \n");
-}
-
-void debughandler(void)
-{
- __asm__ __volatile__(" .code16 \n"
- "debughandle: \n"
- " pushw %cx \n"
- " movw $250, %cx \n"
- "dbh1: \n"
- " loop dbh1 \n"
- " popw %cx \n"
- " iret \n"
- "end_debughandle: \n" ".code32 \n");
-}
-
-// Calling conventions. The first C function is called with this stuff
-// on the stack. They look like value parameters, but note that if you
-// modify them they will go back to the INTx function modified.
-// the C function will call the biosint function with these as
-// REFERENCE parameters. In this way, we can easily get
-// returns back to the INTx caller (i.e. vgabios)
-void callbiosint(void)
-{
- __asm__ __volatile__(" .code16 \n"
- "callbiosint16: \n"
- " push %ds \n"
- " push %es \n"
- " push %fs \n" " push %gs \n"
- // clean up the int #. To save space we put it in the lower
- // byte. But the top 24 bits are junk.
- " andl $0xff, %eax\n"
- // this push does two things:
- // - put the INT # on the stack as a parameter
- // - provides us with a temp for the %cr0 mods.
- " pushl %eax \n" " movl %cr0, %eax\n" " orl $0x00000001, %eax\n" /* PE = 1 */
- " movl %eax, %cr0\n"
- /* Now that we are in protected mode jump to a 32 bit code segment. */
- " data32 ljmp $0x10, $biosprotect\n"
- "biosprotect: \n"
- " .code32 \n"
- " movw $0x18, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- " lidt idtarg \n"
- " call biosint \n"
- // back to real mode ...
- " ljmp $0x28, $__rms_16bit2\n"
- "__rms_16bit2: \n"
- " .code16 \n"
- /* 16 bit code from here on... */
- /* Load the segment registers w/ properly configured segment
- * descriptors. They will retain these configurations (limits,
- * writability, etc.) once protected mode is turned off. */
- " mov $0x30, %ax \n"
- " mov %ax, %ds \n"
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov %ax, %ss \n"
- /* Turn off protection (bit 0 in CR0) */
- " movl %cr0, %eax \n"
- " andl $0xFFFFFFFE, %eax \n"
- " movl %eax, %cr0 \n"
- /* Now really going into real mode */
- " ljmp $0, $__rms_real2 \n"
- "__rms_real2: \n"
- /* Setup a stack
- * FixME: where is esp? */
- " mov $0x0, %ax \n"
- " mov %ax, %ss \n"
- /* ebugging for RGM */
- " mov $0x11, %al \n"
- " outb %al, $0x80 \n"
- /* Load our 16 it idt */
- " xor %ax, %ax \n"
- " mov %ax, %ds \n"
- " lidt __myidt \n"
- /* Dump zeros in the other segregs */
- " mov %ax, %es \n"
- " mov %ax, %fs \n"
- " mov %ax, %gs \n"
- " mov $0x40, %ax \n"
- " mov %ax, %ds \n"
- /* pop the INT # that you pushed earlier */
- " popl %eax \n"
- " pop %gs \n"
- " pop %fs \n"
- " pop %es \n"
- " pop %ds \n"
- " popal \n"
- " iret \n"
- " .code32 \n");
-}
-
-enum {
- PCIBIOS = 0x1a,
- MEMSIZE = 0x12
-};
-
-int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags);
-
-int handleint21(unsigned long *pedi, unsigned long *pesi,
- unsigned long *pebp, unsigned long *pesp,
- unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax,
- unsigned long *pflags);
-
-extern void vga_exit(void);
-
-int biosint(unsigned long intnumber,
- unsigned long gsfs, unsigned long dses,
- unsigned long edi, unsigned long esi,
- unsigned long ebp, unsigned long esp,
- unsigned long ebx, unsigned long edx,
- unsigned long ecx, unsigned long eax,
- unsigned long cs_ip, unsigned short stackflags)
-{
- unsigned long ip;
- unsigned long cs;
- unsigned long flags;
- int ret = -1;
-
- ip = cs_ip & 0xffff;
- cs = cs_ip >> 16;
- flags = stackflags;
-
- printk(BIOS_DEBUG, "biosint: INT# 0x%lx\n", intnumber);
- printk(BIOS_DEBUG, "biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n",
- eax, ebx, ecx, edx);
- printk(BIOS_DEBUG, "biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n",
- ebp, esp, edi, esi);
- printk(BIOS_DEBUG, "biosint: ip 0x%lx cs 0x%lx flags 0x%lx\n",
- ip, cs, flags);
-
- // cases in a good compiler are just as good as your own tables.
- switch (intnumber) {
- case 0: case 1: case 2: case 3: case 4: case 5:
- case 6: case 7: case 8: case 9: case 10:
- case 11: case 12: case 13: case 14: case 15:
- // These are not BIOS service, but the CPU-generated exceptions
- printk(BIOS_INFO, "biosint: Oops, exception %lu\n", intnumber);
- if (esp < 0x1000) {
- printk(BIOS_DEBUG, "Stack contents: ");
- while (esp < 0x1000) {
- printk(BIOS_DEBUG, "0x%04x ", *(unsigned short *)esp);
- esp += 2;
- }
- printk(BIOS_DEBUG, "\n");
- }
- printk(BIOS_DEBUG, "biosint: Bailing out\n");
- // "longjmp"
- if ((acpi_sleep_type == 3)/* || (PAYLOAD_IS_SEABIOS == 0)*/) // add this to keep same with kevin's seabios patch in 2008-9-8
- vga_exit();
- break;
-
- case PCIBIOS:
- ret = pcibios(&edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
- break;
- case MEMSIZE:
- // who cares.
- eax = 64 * 1024;
- ret = 0;
- break;
- case 0x15:
- ret = handleint21(&edi, &esi, &ebp, &esp,
- &ebx, &edx, &ecx, &eax, &flags);
- break;
- default:
- printk(BIOS_INFO, "BIOSINT: Unsupport int #0x%lx\n", intnumber);
- break;
- }
- if (ret)
- flags |= 1; // carry flags
- else
- flags &= ~1;
- stackflags = flags;
- return ret;
-}
-
-void setup_realmode_idt(void)
-{
- extern unsigned char idthandle, end_idthandle;
- extern unsigned char debughandle, end_debughandle;
-
- int i;
- struct realidt *idts = (struct realidt *)0;
- int codesize = &end_idthandle - &idthandle;
- unsigned char *intbyte, *codeptr;
-
- // for each int, we create a customized little handler
- // that just pushes %ax, puts the int # in %al,
- // then calls the common interrupt handler.
- // this necessitated because intel didn't know much about
- // architecture when they did the 8086 (it shows)
- // (hmm do they know anymore even now :-)
- // obviously you can see I don't really care about memory
- // efficiency. If I did I would probe back through the stack
- // and get it that way. But that's really disgusting.
- for (i = 0; i < 256; i++) {
- idts[i].cs = 0;
- codeptr = (char *)4096 + i * codesize;
- idts[i].offset = (unsigned)codeptr;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = i;
- }
-
- // fixed entry points
-
- // VGA BIOSes tend to hardcode f000:f065 as the previous handler of
- // int10.
- // calling convention here is the same as INTs, we can reuse
- // the int entry code.
- codeptr = (char *)0xff065;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = 0x42; /* int42 is the relocated int10 */
-/*
- Fixed entry points
- VBIOS will call f000:f859 instead of sending int15.
- calling convertion here is the same as INTs, we can reuse the int entry code.
-*/
- codeptr = (char *)0xff859;
- memcpy(codeptr, &idthandle, codesize);
- intbyte = codeptr + 3;
- *intbyte = 0x15;
-
- /* debug handler - useful to set a programmable delay between instructions if the
- TF bit is set upon call to real mode */
- idts[1].cs = 0;
- idts[1].offset = 16384;
- memcpy((void *)16384, &debughandle, &end_debughandle - &debughandle);
-
-}
-
-enum {
- CHECK = 0xb001,
- FINDDEV = 0xb102,
- READCONFBYTE = 0xb108,
- READCONFWORD = 0xb109,
- READCONFDWORD = 0xb10a,
- WRITECONFBYTE = 0xb10b,
- WRITECONFWORD = 0xb10c,
- WRITECONFDWORD = 0xb10d
-};
-
-// errors go in AH. Just set these up so that word assigns
-// will work. KISS.
-enum {
- PCIBIOS_NODEV = 0x8600,
- PCIBIOS_BADREG = 0x8700
-};
-
-int
-pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
- unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
- unsigned long *pecx, unsigned long *peax, unsigned long *pflags)
-{
- unsigned long eax = *peax;
- unsigned short func = (unsigned short)eax;
- int retval = 0;
- unsigned short devid, vendorid, devfn;
- short devindex; /* Use short to get rid of garbage in upper half of 32-bit register */
- unsigned char bus;
- device_t dev;
-
- switch (func) {
- case CHECK:
- *pedx = 0x4350;
- *pecx = 0x2049;
- retval = 0;
- break;
- case FINDDEV:
- {
- devid = *pecx;
- vendorid = *pedx;
- devindex = *pesi;
- dev = 0;
- while ((dev = dev_find_device(vendorid, devid, dev))) {
- if (devindex <= 0)
- break;
- devindex--;
- }
- if (dev) {
- unsigned short busdevfn;
- *peax = 0;
- // busnum is an unsigned char;
- // devfn is an int, so we mask it off.
- busdevfn = (dev->bus->secondary << 8)
- | (dev->path.pci.devfn & 0xff);
- printk(BIOS_DEBUG, "0x%x: return 0x%x\n", func,
- busdevfn);
- *pebx = busdevfn;
- retval = 0;
- } else {
- *peax = PCIBIOS_NODEV;
- retval = -1;
- }
- }
- break;
- case READCONFDWORD:
- case READCONFWORD:
- case READCONFBYTE:
- case WRITECONFDWORD:
- case WRITECONFWORD:
- case WRITECONFBYTE:
- {
- unsigned long dword;
- unsigned short word;
- unsigned char byte;
- unsigned char reg;
-
- devfn = *pebx & 0xff;
- bus = *pebx >> 8;
- reg = *pedi;
- dev = dev_find_slot(bus, devfn);
- if (!dev) {
- printk(BIOS_DEBUG, "0x%x: BAD DEVICE bus %d devfn 0x%x\n",
- func, bus, devfn);
- // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn!
- *peax = PCIBIOS_BADREG;
- retval = -1;
- }
- switch (func) {
- case READCONFBYTE:
- byte = pci_read_config8(dev, reg);
- *pecx = byte;
- break;
- case READCONFWORD:
- word = pci_read_config16(dev, reg);
- *pecx = word;
- break;
- case READCONFDWORD:
- dword = pci_read_config32(dev, reg);
- *pecx = dword;
- break;
- case WRITECONFBYTE:
- byte = *pecx;
- pci_write_config8(dev, reg, byte);
- break;
- case WRITECONFWORD:
- word = *pecx;
- pci_write_config16(dev, reg, word);
- break;
- case WRITECONFDWORD:
- dword = *pecx;
- pci_write_config32(dev, reg, dword);
- break;
- }
-
- if (retval)
- retval = PCIBIOS_BADREG;
- printk(BIOS_DEBUG, "0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
- func, bus, devfn, reg, *pecx);
- *peax = 0;
- retval = 0;
- }
- break;
- default:
- printk(BIOS_ERR, "UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func);
- break;
- }
-
- return retval;
-}
-
-/* return value of int0x15(int21)
-AH AL Completion status
-?? 5Fh Function call supported
-?? !=5Fh Function not supported
-00 5Fh Function call successful
-01 5Fh Function call failed
-*/
-int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp,
- unsigned long *esp, unsigned long *ebx, unsigned long *edx,
- unsigned long *ecx, unsigned long *eax, unsigned long *flags)
-{
- int res = -1;
- switch (*eax & 0xffff) {
- case 0x5f19:
- *eax = 0x5f;
- *ecx = 0x3;
- res = 0;
- break;
- case 0x5f18:
- {
- /*
- BL
- Bit[7:4]
- Memory Data Rate
- 0000: 66MHz
- 0001: 100MHz
- 0010: 133MHz
- 0011: 200MHz ( DDR200 )
- 0100: 266MHz ( DDR266 )
- 0101: 333MHz ( DDR333 )
- 0110: 400MHz ( DDR400 )
- 0111: 533MHz ( DDR I/II 533
- 1000: 667MHz ( DDR I/II 667)
- Bit[3:0]
- N: Frame Buffer Size 2^N MB
- */
- u8 i;
- device_t dev;
- dev = dev_find_slot(0, PCI_DEVFN(0, 3));
- i = pci_read_config8(dev, 0xa1);
- i = (i & 0x70);
- i = i >> 4;
- if (i == 0) {
- *eax = 0x00; //not support 5f18
- break;
- }
- i = i + 2;
- *ebx = (u32) i;
- i = pci_read_config8(dev, 0x90);
- i = (i & 0x07);
- i = i + 3;
- i = i << 4;
- *ebx = (*ebx) + ((u32) i);
- *eax = 0x5f;
- res = 0;
- break;
- }
- case 0x5f00:
- *eax = 0x005f;
- res = 0;
- break;
- case 0x5f01:
- *eax = 0x5f;
- *ecx = (*ecx & 0xffffff00) | 2; // panel type = 2 = 1024 * 768
- res = 0;
- break;
- case 0x5f02:
- *eax = 0x5f;
- *ebx = (*ebx & 0xffff0000) | 2;
- *ecx = (*ecx & 0xffff0000) | 0x401; // PAL + crt only
- *edx = (*edx & 0xffff0000) | 0; // TV Layout - default
- res = 0;
- break;
- case 0x5f0f:
- *eax = 0x005f;
- res = 0;
- break;
- default:
- *eax = 0;
- break;
- }
- return res;
-}
+++ /dev/null
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef _PC80_VGABIOS
-#define _PC80_VGABIOS
-
-extern struct chip_control pc80_vgabios_control;
-
-struct pc80_vgabios_config {
- int nothing;
-};
-
-void vga_enable_console(void);
-void do_vgabios(void);
-void setup_realmode_idt(void);
-void write_protect_vgabios(void);
-
-#endif /* _PC80_VGABIOS */
projects / coreboot.git / commitdiff