// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2002 MandrakeSoft S.A.
//
-// This file may be distributed under the terms of the GNU GPLv3 license.
+// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "ioport.h" // PORT_*
#include "config.h" // CONFIG_*
#include "cmos.h" // CMOS_*
#include "util.h" // memset
#include "biosvar.h" // struct bios_data_area_s
-#include "ata.h" // hard_drive_setup
#include "disk.h" // floppy_drive_setup
#include "memmap.h" // add_e820
#include "pic.h" // pic_setup
#include "pci.h" // create_pirtable
#include "acpi.h" // acpi_bios_init
#include "bregs.h" // struct bregs
+#include "boot.h" // IPL
-#define bda ((struct bios_data_area_s *)MAKE_FARPTR(SEG_BDA, 0))
-#define ebda ((struct extended_bios_data_area_s *)MAKE_FARPTR(SEG_EBDA, 0))
-
-static void
-set_irq(int vector, void *loc)
+void
+__set_irq(int vector, void *loc)
{
- SET_BDA(ivecs[vector].seg, SEG_BIOS);
- SET_BDA(ivecs[vector].offset, (u32)loc - BUILD_BIOS_ADDR);
+ SET_IVT(vector, SEG_BIOS, (u32)loc - BUILD_BIOS_ADDR);
}
-// Symbols defined in romlayout.S
-extern void dummy_iret_handler();
-extern void entry_08();
-extern void entry_09();
-extern void entry_hwirq();
-extern void entry_0e();
-extern void entry_10();
-extern void entry_11();
-extern void entry_12();
-extern void entry_13();
-extern void entry_14();
-extern void entry_15();
-extern void entry_16();
-extern void entry_17();
-extern void entry_18();
-extern void entry_19();
-extern void entry_1a();
-extern void entry_1c();
-extern void entry_40();
-extern void entry_70();
-extern void entry_74();
-extern void entry_75();
-extern void entry_76();
+#define set_irq(vector, func) do { \
+ extern void func (void); \
+ __set_irq(vector, func); \
+ } while (0)
static void
-init_bda()
+init_ivt()
{
- dprintf(3, "init bda\n");
- memset(bda, 0, sizeof(*bda));
-
- SET_BDA(mem_size_kb, BASE_MEM_IN_K);
+ dprintf(3, "init ivt\n");
+ // Initialize all vectors to a dummy handler.
int i;
for (i=0; i<256; i++)
- set_irq(i, &dummy_iret_handler);
-
- set_irq(0x08, &entry_08);
- set_irq(0x09, &entry_09);
- //set_irq(0x0a, &entry_hwirq);
- //set_irq(0x0b, &entry_hwirq);
- //set_irq(0x0c, &entry_hwirq);
- //set_irq(0x0d, &entry_hwirq);
- set_irq(0x0e, &entry_0e);
- //set_irq(0x0f, &entry_hwirq);
- set_irq(0x10, &entry_10);
- set_irq(0x11, &entry_11);
- set_irq(0x12, &entry_12);
- set_irq(0x13, &entry_13);
- set_irq(0x14, &entry_14);
- set_irq(0x15, &entry_15);
- set_irq(0x16, &entry_16);
- set_irq(0x17, &entry_17);
- set_irq(0x18, &entry_18);
- set_irq(0x19, &entry_19);
- set_irq(0x1a, &entry_1a);
- set_irq(0x1c, &entry_1c);
- set_irq(0x40, &entry_40);
- set_irq(0x70, &entry_70);
- //set_irq(0x71, &entry_hwirq);
- //set_irq(0x72, &entry_hwirq);
- //set_irq(0x73, &entry_hwirq);
- set_irq(0x74, &entry_74);
- set_irq(0x75, &entry_75);
- set_irq(0x76, &entry_76);
- //set_irq(0x77, &entry_hwirq);
+ set_irq(i, dummy_iret_handler);
+
+ // Initialize all hw vectors to a default hw handler.
+ for (i=0x08; i<=0x0f; i++)
+ set_irq(i, entry_hwpic1);
+ for (i=0x70; i<=0x77; i++)
+ set_irq(i, entry_hwpic2);
+
+ // Initialize software handlers.
+ set_irq(0x10, entry_10);
+ set_irq(0x11, entry_11_official);
+ set_irq(0x12, entry_12_official);
+ set_irq(0x13, entry_13_official);
+ set_irq(0x14, entry_14);
+ set_irq(0x15, entry_15);
+ set_irq(0x16, entry_16);
+ set_irq(0x17, entry_17);
+ set_irq(0x18, entry_18);
+ set_irq(0x19, entry_19_official);
+ set_irq(0x1a, entry_1a);
+ set_irq(0x1c, entry_1c);
+ set_irq(0x40, entry_40);
// set vector 0x79 to zero
// this is used by 'gardian angel' protection system
- SET_BDA(ivecs[0x79].seg, 0);
- SET_BDA(ivecs[0x79].offset, 0);
+ SET_IVT(0x79, 0, 0);
- set_irq(0x1E, &diskette_param_table2);
+ __set_irq(0x1E, &diskette_param_table2);
}
static void
-init_ebda()
+init_bda()
{
+ dprintf(3, "init bda\n");
+
+ struct bios_data_area_s *bda = MAKE_FARPTR(SEG_BDA, 0);
+ memset(bda, 0, sizeof(*bda));
+
+ int esize = DIV_ROUND_UP(sizeof(struct extended_bios_data_area_s), 1024);
+ SET_BDA(mem_size_kb, 640 - esize);
+ u16 eseg = FARPTR_TO_SEG((640 - esize) * 1024);
+ SET_BDA(ebda_seg, eseg);
+
+ struct extended_bios_data_area_s *ebda = get_ebda_ptr();
memset(ebda, 0, sizeof(*ebda));
- ebda->size = EBDA_SIZE;
- SET_BDA(ebda_seg, SEG_EBDA);
- SET_BDA(ivecs[0x41].seg, SEG_EBDA);
- SET_BDA(ivecs[0x41].offset
- , offsetof(struct extended_bios_data_area_s, fdpt[0]));
- SET_BDA(ivecs[0x46].seg, SEG_EBDA);
- SET_BDA(ivecs[0x41].offset
- , offsetof(struct extended_bios_data_area_s, fdpt[1]));
+ ebda->size = esize;
+ SET_IVT(0x41, eseg, offsetof(struct extended_bios_data_area_s, fdpt[0]));
+ SET_IVT(0x46, eseg, offsetof(struct extended_bios_data_area_s, fdpt[1]));
}
static void
coreboot_fill_map();
} else {
// On emulators, get memory size from nvram.
- u32 rs = (inb_cmos(CMOS_MEM_EXTMEM2_LOW)
- | (inb_cmos(CMOS_MEM_EXTMEM2_HIGH) << 8)) * 65536;
+ u32 rs = ((inb_cmos(CMOS_MEM_EXTMEM2_LOW) << 16)
+ | (inb_cmos(CMOS_MEM_EXTMEM2_HIGH) << 24));
if (rs)
rs += 16 * 1024 * 1024;
else
- rs = ((inb_cmos(CMOS_MEM_EXTMEM_LOW)
- | (inb_cmos(CMOS_MEM_EXTMEM_HIGH) << 8)) * 1024
+ rs = (((inb_cmos(CMOS_MEM_EXTMEM_LOW) << 10)
+ | (inb_cmos(CMOS_MEM_EXTMEM_HIGH) << 18))
+ 1 * 1024 * 1024);
- SET_EBDA(ram_size, rs);
+ RamSize = rs;
add_e820(0, rs, E820_RAM);
+ // Check for memory over 4Gig
+ u64 high = ((inb_cmos(CMOS_MEM_HIGHMEM_LOW) << 16)
+ | (inb_cmos(CMOS_MEM_HIGHMEM_MID) << 24)
+ | ((u64)inb_cmos(CMOS_MEM_HIGHMEM_HIGH) << 32));
+ RamSizeOver4G = high;
+ add_e820(0x100000000ull, high, E820_RAM);
+
/* reserve 256KB BIOS area at the end of 4 GB */
add_e820(0xfffc0000, 256*1024, E820_RESERVED);
}
add_e820(0xa0000, 0x50000, E820_HOLE);
// Mark known areas as reserved.
- add_e820((u32)MAKE_FARPTR(SEG_EBDA, 0), EBDA_SIZE * 1024, E820_RESERVED);
+ u16 ebda_seg = get_ebda_seg();
+ add_e820((u32)MAKE_FARPTR(ebda_seg, 0), GET_EBDA2(ebda_seg, size) * 1024
+ , E820_RESERVED);
add_e820(BUILD_BIOS_ADDR, BUILD_BIOS_SIZE, E820_RESERVED);
- dprintf(1, "ram_size=0x%08x\n", GET_EBDA(ram_size));
+ if (CONFIG_KVM)
+ // 4 pages before the bios, 3 pages for vmx tss pages, the
+ // other page for EPT real mode pagetable
+ add_e820(0xfffbc000, 4*4096, E820_RESERVED);
+
+ dprintf(1, "Ram Size=0x%08x\n", RamSize);
}
static void
// XXX - not supported on coreboot yet.
return;
- smm_init();
-
create_pirtable();
mptable_init();
dprintf(3, "init boot device ordering\n");
// Floppy drive
- struct ipl_entry_s *ip = &ebda->ipl.table[0];
+ struct ipl_entry_s *ip = &IPL.table[0];
ip->type = IPL_TYPE_FLOPPY;
ip++;
ip++;
}
- ebda->ipl.count = ip - ebda->ipl.table;
- ebda->ipl.sequence = 0xffff;
+ IPL.count = ip - IPL.table;
+ SET_EBDA(boot_sequence, 0xffff);
if (CONFIG_COREBOOT) {
// XXX - hardcode defaults for coreboot.
- ebda->ipl.bootorder = 0x00000231;
- ebda->ipl.checkfloppysig = 1;
+ IPL.bootorder = 0x00000231;
+ IPL.checkfloppysig = 1;
} else {
// On emulators, get boot order from nvram.
- ebda->ipl.bootorder = (inb_cmos(CMOS_BIOS_BOOTFLAG2)
- | ((inb_cmos(CMOS_BIOS_BOOTFLAG1) & 0xf0) << 4));
+ IPL.bootorder = (inb_cmos(CMOS_BIOS_BOOTFLAG2)
+ | ((inb_cmos(CMOS_BIOS_BOOTFLAG1) & 0xf0) << 4));
if (!(inb_cmos(CMOS_BIOS_BOOTFLAG1) & 1))
- ebda->ipl.checkfloppysig = 1;
- }
-}
-
-// Execute a given option rom.
-static void
-callrom(u16 seg, u16 offset)
-{
- struct bregs br;
- memset(&br, 0, sizeof(br));
- // XXX - should set br.ax to PCI Bus/DevFn
- br.bx = 0xffff;
- br.dx = 0xffff;
- br.es = SEG_BIOS;
- extern char pnp_string[];
- br.di = (u32)pnp_string - BUILD_BIOS_ADDR;
- br.cs = seg;
- br.ip = offset;
- call16(&br);
-
- debug_serial_setup();
-}
-
-// Find and run any "option roms" found in the given address range.
-static void
-rom_scan(u32 start, u32 end)
-{
- if (! CONFIG_OPTIONROMS)
- return;
-
- u8 *p = (u8*)start;
- for (; p <= (u8*)end; p += 2048) {
- u8 *rom = p;
- if (*(u16*)rom != 0xaa55)
- continue;
- u32 len = rom[2] * 512;
- u8 sum = checksum(rom, len);
- if (sum != 0) {
- dprintf(1, "Found option rom with bad checksum:"
- " loc=%p len=%d sum=%x\n"
- , rom, len, sum);
- continue;
- }
- p = (u8*)(((u32)p + len) / 2048 * 2048);
- dprintf(1, "Running option rom at %p\n", rom+3);
- callrom(FARPTR_TO_SEG(rom), FARPTR_TO_OFFSET(rom + 3));
-
- if (GET_BDA(ebda_seg) != SEG_EBDA)
- BX_PANIC("Option rom at %p attempted to move ebda from %x to %x\n"
- , rom, SEG_EBDA, GET_BDA(ebda_seg));
-
- // Look at the ROM's PnP Expansion header. Properly, we're supposed
- // to init all the ROMs and then go back and build an IPL table of
- // all the bootable devices, but we can get away with one pass.
- if (rom[0x1a] != '$' || rom[0x1b] != 'P'
- || rom[0x1c] != 'n' || rom[0x1d] != 'P')
- continue;
- // 0x1A is also the offset into the expansion header of...
- // the Bootstrap Entry Vector, or zero if there is none.
- u16 entry = *(u16*)&rom[0x1a+0x1a];
- if (!entry)
- continue;
- // Found a device that thinks it can boot the system. Record
- // its BEV and product name string.
-
- if (! CONFIG_BOOT)
- continue;
-
- if (ebda->ipl.count >= ARRAY_SIZE(ebda->ipl.table))
- continue;
-
- struct ipl_entry_s *ip = &ebda->ipl.table[ebda->ipl.count];
- ip->type = IPL_TYPE_BEV;
- ip->vector = (FARPTR_TO_SEG(rom) << 16) | entry;
-
- u16 desc = *(u16*)&rom[0x1a+0x10];
- if (desc)
- ip->description = (u32)MAKE_FARPTR(FARPTR_TO_SEG(rom), desc);
-
- ebda->ipl.count++;
+ IPL.checkfloppysig = 1;
}
}
-// Call into vga code to turn on console.
-static void
-vga_setup()
-{
- dprintf(1, "Scan for VGA option rom\n");
- rom_scan(0xc0000, 0xc7800);
-
- dprintf(1, "Turning on vga console\n");
- struct bregs br;
- memset(&br, 0, sizeof(br));
- br.ax = 0x0003;
- call16_int(0x10, &br);
-}
-
// Main setup code.
static void
post()
{
+ init_ivt();
init_bda();
- init_ebda();
pic_setup();
timer_setup();
- kbd_setup();
- lpt_setup();
- serial_setup();
- mouse_setup();
mathcp_setup();
- memmap_setup();
+ smp_probe_setup();
+ memmap_setup();
ram_probe();
+ mtrr_setup();
+ pnp_setup();
vga_setup();
- printf("BIOS - begin\n\n");
+ kbd_setup();
+ lpt_setup();
+ serial_setup();
+ mouse_setup();
pci_bios_setup();
+ smm_init();
init_bios_tables();
-
memmap_finalize();
floppy_drive_setup();
init_boot_vectors();
- dprintf(1, "Scan for option roms\n");
- rom_scan(0xc8000, 0xe0000);
-}
-
-// Clear .bss section for C code.
-static void
-clear_bss()
-{
- dprintf(3, "clearing .bss section\n");
- extern char __bss_start[], __bss_end[];
- memset(__bss_start, 0, __bss_end - __bss_start);
-}
-
-// Reset DMA controller
-static void
-init_dma()
-{
- // first reset the DMA controllers
- outb(0, PORT_DMA1_MASTER_CLEAR);
- outb(0, PORT_DMA2_MASTER_CLEAR);
-
- // then initialize the DMA controllers
- outb(0xc0, PORT_DMA2_MODE_REG);
- outb(0x00, PORT_DMA2_MASK_REG);
-}
-
-// Check if the machine was setup with a special restart vector.
-static void
-check_restart_status()
-{
- // Get and then clear CMOS shutdown status.
- u8 status = inb_cmos(CMOS_RESET_CODE);
- outb_cmos(0, CMOS_RESET_CODE);
-
- if (status == 0x00 || status == 0x09 || status >= 0x0d)
- // Normal post
- return;
-
- if (status != 0x05) {
- BX_PANIC("Unimplemented shutdown status: %02x\n", status);
- return;
- }
-
- // XXX - this is supposed to jump without changing any memory -
- // but the stack has been altered by the time the code gets here.
- eoi_pic2();
- struct bregs br;
- memset(&br, 0, sizeof(br));
- br.cs = GET_BDA(jump_cs_ip) >> 16;
- br.ip = GET_BDA(jump_cs_ip);
- call16(&br);
+ optionrom_setup();
}
// 32-bit entry point.
_start()
{
init_dma();
- check_restart_status();
debug_serial_setup();
dprintf(1, "Start bios\n");
- // Setup for .bss and .data sections
- clear_bss();
+ // Allow writes to modify bios area (0xf0000)
make_bios_writable();
// Perform main setup code.
// Prep for boot process.
make_bios_readonly();
- clear_bss();
// Invoke int 19 to start boot process.
dprintf(3, "Jump to int19\n");
projects / seabios.git / blobdiff