1 #include <console/console.h>
2 #include <device/pci.h>
3 #include <device/pci_ids.h>
4 #include <device/pci_ops.h>
8 #include <cpu/amd/gx2def.h>
10 /* what a mess this uncompress thing is. I am not at all happy about how this
11 * was done, but can't fix it yet. RGM
13 #warning "Fix the uncompress once linuxbios knows how to do it"
14 // This GETBIT is supposed to work on little endian
15 // 32bit systems. The algorithm will definitely need
16 // some fixing on other systems, but it might not be
17 // a problem since the nrv2b binary behaves the same..
26 #define GETBIT_8(bb, src, ilen) \
27 (((bb = bb & 0x7f ? bb*2 : ((unsigned)src[ilen++]*2+1)) >> 8) & 1)
29 #define GETBIT_LE16(bb, src, ilen) \
30 (bb*=2,bb&0xffff ? (bb>>16)&1 : (ilen+=2,((bb=(src[ilen-2]+src[ilen-1]*256u)*2+1)>>16)&1))
31 #define GETBIT_LE32(bb, src, ilen) \
32 (bc > 0 ? ((bb>>--bc)&1) : (bc=31,\
33 bb=*(const uint32_t *)((src)+ilen),ilen+=4,(bb>>31)&1))
35 #if ENDIAN == 0 && BITSIZE == 8
36 #define GETBIT(bb, src, ilen) GETBIT_8(bb, src, ilen)
38 #if ENDIAN == 0 && BITSIZE == 16
39 #define GETBIT(bb, src, ilen) GETBIT_LE16(bb, src, ilen)
41 #if ENDIAN == 0 && BITSIZE == 32
42 #define GETBIT(bb, src, ilen) GETBIT_LE32(bb, src, ilen)
45 static unsigned long unrv2b(uint8_t * src, uint8_t * dst)
47 unsigned long ilen = 0, olen = 0, last_m_off = 1;
51 unsigned long file_len = *(unsigned long *) src;
53 printk_debug("compressed file len is supposed to be %d bytes\n", file_len);
56 /* FIXME: check olen with the length stored in first 4 bytes */
59 unsigned int m_off, m_len;
60 while (GETBIT(bb, src, ilen)) {
61 dst[olen++] = src[ilen++];
66 m_off = m_off * 2 + GETBIT(bb, src, ilen);
67 } while (!GETBIT(bb, src, ilen));
71 m_off = (m_off - 3) * 256 + src[ilen++];
72 if (m_off == 0xffffffffU)
77 m_len = GETBIT(bb, src, ilen);
78 m_len = m_len * 2 + GETBIT(bb, src, ilen);
82 m_len = m_len * 2 + GETBIT(bb, src, ilen);
83 } while (!GETBIT(bb, src, ilen));
86 m_len += (m_off > 0xd00);
88 m_pos = dst + olen - m_off;
89 dst[olen++] = *m_pos++;
91 dst[olen++] = *m_pos++;
92 } while (--m_len > 0);
95 printk_debug("computed len is %d, file len is %d\n", olen, file_len);
100 /* vsmsetup.c derived from vgabios.c. Derived from: */
102 /*------------------------------------------------------------ -*- C -*-
103 * 2 Kernel Monte a.k.a. Linux loading Linux on x86
105 * Erik Arjan Hendriks <hendriks@lanl.gov>
107 * This version is a derivative of the original two kernel monte
108 * which is (C) 2000 Scyld.
110 * Copyright (C) 2000 Scyld Computing Corporation
112 * This program is free software; you can redistribute it and/or modify
113 * it under the terms of the GNU General Public License as published by
114 * the Free Software Foundation; either version 2 of the License, or
115 * (at your option) any later version.
117 * This program is distributed in the hope that it will be useful,
118 * but WITHOUT ANY WARRANTY; without even the implied warranty of
119 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
120 * GNU General Public License for more details.
122 * You should have received a copy of the GNU General Public License
123 * along with this program; if not, write to the Free Software
124 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
126 * Portions related to the alpha architecture are:
128 * Copyright(C) 2001 University of California. LA-CC Number 01-67.
129 * This software has been authored by an employee or employees of the
130 * University of California, operator of the Los Alamos National
131 * Laboratory under Contract No. W-7405-ENG-36 with the U.S.
132 * Department of Energy. The U.S. Government has rights to use,
133 * reproduce, and distribute this software. If the software is
134 * modified to produce derivative works, such modified software should
135 * be clearly marked, so as not to confuse it with the version
136 * available from LANL.
138 * This software may be used and distributed according to the terms
139 * of the GNU General Public License, incorporated herein by
140 * reference to http://www.gnu.org/licenses/gpl.html.
142 * This software is provided by the author(s) "as is" and any express
143 * or implied warranties, including, but not limited to, the implied
144 * warranties of merchantability and fitness for a particular purpose
145 * are disclaimed. In no event shall the author(s) be liable for any
146 * direct, indirect, incidental, special, exemplary, or consequential
147 * damages (including, but not limited to, procurement of substitute
148 * goods or services; loss of use, data, or profits; or business
149 * interruption) however caused and on any theory of liability,
150 * whether in contract, strict liability, or tort (including
151 * negligence or otherwise) arising in any way out of the use of this
152 * software, even if advised of the possibility of such damage.
155 *--------------------------------------------------------------------*/
157 /* Modified to be a self sufficient plug in so that it can be used
158 without reliance on other parts of core Linuxbios
159 (C) 2005 Nick.Barker9@btinternet.com
161 Used initially for epia-m where there are problems getting the bios
162 emulator to successfully run this bios.
165 /* Declare a temporary global descriptor table - necessary because the
166 Core part of the bios no longer sets up any 16 bit segments */
168 /* pointer to original gdt */
170 " .word gdt_limit \n"
173 /* compute the table limit */
174 "__mygdt_limit = __mygdt_end - __mygdt - 1 \n"
177 " .word __mygdt_limit \n"
181 /* selgdt 0, unused */
182 " .word 0x0000, 0x0000 \n"
183 " .byte 0x00, 0x00, 0x00, 0x00 \n"
185 /* selgdt 8, unused */
186 " .word 0x0000, 0x0000 \n"
187 " .byte 0x00, 0x00, 0x00, 0x00 \n"
189 /* selgdt 0x10, flat code segment */
190 " .word 0xffff, 0x0000 \n"
191 " .byte 0x00, 0x9b, 0xcf, 0x00 \n"
193 /* selgdt 0x18, flat data segment */
194 " .word 0xffff, 0x0000 \n"
195 " .byte 0x00, 0x93, 0xcf, 0x00 \n"
197 /* selgdt 0x20, unused */
198 " .word 0x0000, 0x0000 \n"
199 " .byte 0x00, 0x00, 0x00, 0x00 \n"
201 /* selgdt 0x28 16-bit 64k code at 0x00000000 */
202 " .word 0xffff, 0x0000 \n"
203 " .byte 0, 0x9a, 0, 0 \n"
205 /* selgdt 0x30 16-bit 64k data at 0x00000000 */
206 " .word 0xffff, 0x0000 \n"
207 " .byte 0, 0x92, 0, 0 \n"
212 /* Declare a pointer to where our idt is going to be i.e. at mem zero */
213 __asm__ ("__myidt: \n"
221 /* The address arguments to this function are PHYSICAL ADDRESSES */
222 static void real_mode_switch_call_vsm(unsigned long smm, unsigned long sysm)
224 __asm__ __volatile__ (
225 // paranoia -- does ecx get saved? not sure. This is
226 // the easiest safe thing to do.
229 " mov %esp, __stack \n"
231 "__stack: .long 0 \n"
233 /* get devfn into %ecx */
234 " movl %esp, %ebp \n"
236 /* I'm not happy about that pushal followed by esp-relative references.
237 * just do hard-codes for now
239 " movl 8(%ebp), %ecx \n"
240 " movl 12(%ebp), %edx \n"
242 " movl $0x10000026, %ecx \n"
243 " movl $0x10000028, %edx \n"
246 " lgdt %cs:__mygdtaddr \n"
248 /* This configures CS properly for real mode. */
249 " ljmp $0x28, $__rms_16bit\n"
252 /* 16 bit code from here on... */
254 /* Load the segment registers w/ properly configured segment
255 * descriptors. They will retain these configurations (limits,
256 * writability, etc.) once protected mode is turned off. */
264 /* Turn off protection (bit 0 in CR0) */
265 " movl %cr0, %eax \n"
266 " andl $0xFFFFFFFE, %eax \n"
267 " movl %eax, %cr0 \n"
269 /* Now really going into real mode */
270 " ljmp $0, $__rms_real\n"
273 /* put the stack at the end of page zero.
274 * that way we can easily share it between real and protected,
275 * since the 16-bit ESP at segment 0 will work for any case. */
279 " movl $0x1000, %eax \n"
280 " movl %eax, %esp \n"
282 /* Load our 16 it idt */
287 /* Dump zeros in the other segregs */
289 /* FixMe: Big real mode for gs, fs? */
295 " movl $0x10000026, %ecx \n"
296 " movl $0x10000028, %edx \n"
298 /* run VGA BIOS at 0x6000:0020 */
299 " lcall $0x6000, $0x0020\n"
301 /* if we got here, just about done.
302 * Need to get back to protected mode */
303 " movl %cr0, %eax \n"
304 " orl $0x0000001, %eax\n" /* PE = 1 */
305 " movl %eax, %cr0 \n"
307 /* Now that we are in protected mode jump to a 32 bit code segment. */
308 " data32 ljmp $0x10, $vsmrestart\n"
311 " movw $0x18, %ax \n"
318 /* restore proper gdt and idt */
319 " lgdt %cs:gdtarg \n"
324 " mov __stack, %esp \n"
329 __asm__ (".text\n""real_mode_switch_end:\n");
330 extern char real_mode_switch_end[];
333 void do_vsmbios(void)
336 unsigned long busdevfn;
337 unsigned int rom = 0;
339 unsigned int size = SMM_SIZE*1024;
342 printk_err("do_vsmbios\n");
343 /* clear vsm bios data area */
344 for (i = 0x400; i < 0x500; i++) {
345 *(unsigned char *) i = 0;
348 /* declare rom address here - keep any config data out of the way
349 * of core LXB stuff */
351 /* this is the base of rom on the GX2 at present. At some point, this has to be
352 * much better parameterized
356 /* the VSA starts at the base of rom - 64 */
357 rom = ((unsigned long) 0) - (ROM_SIZE + 64*1024);
359 buf = (unsigned char *) 0x60000;
360 unrv2b((uint8_t *)rom, buf);
361 printk_debug("buf %p *buf %d buf[256k] %d\n",
362 buf, buf[0], buf[SMM_SIZE*1024]);
363 printk_debug("buf[0x20] signature is %x:%x:%x:%x\n",
364 buf[0x20] ,buf[0x21] ,buf[0x22],buf[0x23]);
365 /* check for post code at start of vsainit.bin. If you don't see it,
367 if ((buf[0x20] != 0xb0) || (buf[0x21] != 0x10) ||
368 (buf[0x22] != 0xe6) || (buf[0x23] != 0x80)) {
369 printk_err("do_vsmbios: no vsainit.bin signature, skipping!\n");
373 //memcpy((void *) 0x60000, buf, size);
375 //for (i = 0; i < 0x800000; i++)
378 /* ecx gets smm, edx gets sysm */
379 printk_err("Call real_mode_switch_call_vsm\n");
380 real_mode_switch_call_vsm(0x10000026, 0x10000028);
382 /* restart timer 1 */
388 // we had hoped to avoid this.
389 // this is a stub IDT only. It's main purpose is to ignore calls
391 // no longer. Dammit. We have to respond to these.
393 unsigned short offset, cs;
396 // from a handy writeup that andrey found.
399 // There are some assumptions we can make here.
400 // First, the Top Of Stack (TOS) is located on the top of page zero.
401 // we can share this stack between real and protected mode.
402 // that simplifies a lot of things ...
403 // we'll just push all the registers on the stack as longwords,
404 // and pop to protected mode.
405 // second, since this only ever runs as part of linuxbios,
406 // we know all the segment register values -- so we don't save any.
407 // keep the handler that calls things small. It can do a call to
408 // more complex code in linuxbios itself. This helps a lot as we don't
409 // have to do address fixup in this little stub, and calls are absolute
410 // so the handler is relocatable.
413 __asm__ __volatile__ (
418 " ljmp $0, $callbiosint16\n"
424 void debughandler(void)
426 __asm__ __volatile__ (
435 "end_debughandle: \n"
440 // Calling conventions. The first C function is called with this stuff
441 // on the stack. They look like value parameters, but note that if you
442 // modify them they will go back to the INTx function modified.
443 // the C function will call the biosint function with these as
444 // REFERENCE parameters. In this way, we can easily get
445 // returns back to the INTx caller (i.e. vgabios)
446 void callbiosint(void)
448 __asm__ __volatile__ (
455 // clean up the int #. To save space we put it in the lower
456 // byte. But the top 24 bits are junk.
457 " andl $0xff, %eax\n"
458 // this push does two things:
459 // - put the INT # on the stack as a parameter
460 // - provides us with a temp for the %cr0 mods.
465 " orl $0x00000001, %eax\n" /* PE = 1 */
467 /* Now that we are in protected mode jump to a 32 bit code segment. */
468 " data32 ljmp $0x10, $biosprotect\n"
471 " movw $0x18, %ax \n"
479 // back to real mode ...
480 " ljmp $0x28, $__rms_16bit2\n"
483 /* 16 bit code from here on... */
484 /* Load the segment registers w/ properly configured segment
485 * descriptors. They will retain these configurations (limits,
486 * writability, etc.) once protected mode is turned off. */
494 /* Turn off protection (bit 0 in CR0) */
495 " movl %cr0, %eax \n"
496 " andl $0xFFFFFFFE, %eax \n"
497 " movl %eax, %cr0 \n"
499 /* Now really going into real mode */
500 " ljmp $0, $__rms_real2 \n"
504 * FixME: where is esp? */
505 /* no need for a fix here. The esp is shared from 32-bit and 16-bit mode.
506 * you have to hack on the ss, but the esp remains the same across
512 /* debugging for RGM */
514 " outb %al, $0x80 \n"
516 /* Load our 16 bit idt */
521 /* Dump zeros in the other segregs */
528 /* pop the INT # that you pushed earlier */
545 int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
546 unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
547 unsigned long *pecx, unsigned long *peax, unsigned long *pflags);
549 int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
550 unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
551 unsigned long *pecx, unsigned long *peax, unsigned long *pflags
554 int biosint(unsigned long intnumber,
555 unsigned long gsfs, unsigned long dses,
556 unsigned long edi, unsigned long esi,
557 unsigned long ebp, unsigned long esp,
558 unsigned long ebx, unsigned long edx,
559 unsigned long ecx, unsigned long eax,
560 unsigned long cs_ip, unsigned short stackflags)
571 printk_debug("biosint: INT# 0x%lx\n", intnumber);
572 printk_debug("biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n",
574 printk_debug("biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n",
576 printk_debug("biosint: ip 0x%x cs 0x%x flags 0x%x\n",
578 printk_debug("biosint: gs 0x%x fs 0x%x ds 0x%x es 0x%x\n",
579 gsfs >> 16, gsfs & 0xffff, dses >> 16, dses & 0xffff);
581 // cases in a good compiler are just as good as your own tables.
584 // These are not BIOS service, but the CPU-generated exceptions
585 printk_info("biosint: Oops, exception %u\n", intnumber);
587 printk_debug("Stack contents: ");
588 while (esp < 0x1000) {
589 printk_debug("0x%04x ", *(unsigned short *) esp);
594 printk_debug("biosint: Bailing out ... not now\n");
600 ret = pcibios( &edi, &esi, &ebp, &esp,
601 &ebx, &edx, &ecx, &eax, &flags);
609 ret=handleint21( &edi, &esi, &ebp, &esp,
610 &ebx, &edx, &ecx, &eax, &flags);
613 printk_info("BIOSINT: Unsupport int #0x%x\n",
618 flags |= 1; // carry flags
626 void setup_realmode_idt(void)
628 extern unsigned char idthandle, end_idthandle;
629 extern unsigned char debughandle, end_debughandle;
632 struct realidt *idts = (struct realidt *) 0;
633 int codesize = &end_idthandle - &idthandle;
634 unsigned char *intbyte, *codeptr;
636 // for each int, we create a customized little handler
637 // that just pushes %ax, puts the int # in %al,
638 // then calls the common interrupt handler.
639 // this necessitated because intel didn't know much about
640 // architecture when they did the 8086 (it shows)
641 // (hmm do they know anymore even now :-)
642 // obviously you can see I don't really care about memory
643 // efficiency. If I did I would probe back through the stack
644 // and get it that way. But that's really disgusting.
645 for (i = 0; i < 256; i++) {
647 codeptr = (char*) 4096 + i * codesize;
648 idts[i].offset = (unsigned) codeptr;
649 memcpy(codeptr, &idthandle, codesize);
650 intbyte = codeptr + 3;
654 // fixed entry points
656 // VGA BIOSes tend to hardcode f000:f065 as the previous handler of
658 // calling convention here is the same as INTs, we can reuse
659 // the int entry code.
660 codeptr = (char*) 0xff065;
661 memcpy(codeptr, &idthandle, codesize);
662 intbyte = codeptr + 3;
663 *intbyte = 0x42; /* int42 is the relocated int10 */
665 /* debug handler - useful to set a programmable delay between instructions if the
666 TF bit is set upon call to real mode */
668 idts[1].offset = 16384;
669 memcpy(16384, &debughandle, &end_debughandle - &debughandle);
677 READCONFBYTE = 0xb108,
678 READCONFWORD = 0xb109,
679 READCONFDWORD = 0xb10a,
680 WRITECONFBYTE = 0xb10b,
681 WRITECONFWORD = 0xb10c,
682 WRITECONFDWORD = 0xb10d
685 // errors go in AH. Just set these up so that word assigns
688 PCIBIOS_NODEV = 0x8600,
689 PCIBIOS_BADREG = 0x8700
693 pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp,
694 unsigned long *pesp, unsigned long *pebx, unsigned long *pedx,
695 unsigned long *pecx, unsigned long *peax, unsigned long *pflags)
697 unsigned long edi = *pedi;
698 unsigned long esi = *pesi;
699 unsigned long ebp = *pebp;
700 unsigned long esp = *pesp;
701 unsigned long ebx = *pebx;
702 unsigned long edx = *pedx;
703 unsigned long ecx = *pecx;
704 unsigned long eax = *peax;
705 unsigned long flags = *pflags;
706 unsigned short func = (unsigned short) eax;
708 unsigned short devid, vendorid, devfn;
709 short devindex; /* Use short to get rid of gabage in upper half of 32-bit register */
725 while ((dev = dev_find_device(vendorid, devid, dev))) {
731 unsigned short busdevfn;
733 // busnum is an unsigned char;
734 // devfn is an int, so we mask it off.
735 busdevfn = (dev->bus->secondary << 8)
736 | (dev->path.u.pci.devfn & 0xff);
737 printk_debug("0x%x: return 0x%x\n", func, busdevfn);
741 *peax = PCIBIOS_NODEV;
758 devfn = *pebx & 0xff;
761 dev = dev_find_slot(bus, devfn);
763 printk_debug("0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn);
764 // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn!
765 *peax = PCIBIOS_BADREG;
770 byte = pci_read_config8(dev, reg);
774 word = pci_read_config16(dev, reg);
778 dword = pci_read_config32(dev, reg);
783 pci_write_config8(dev, reg, byte);
787 pci_write_config16(dev, reg, word);
791 pci_write_config32(dev, reg, dword);
796 retval = PCIBIOS_BADREG;
797 printk_debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n",
798 func, bus, devfn, reg, *pecx);
804 printk_err("UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func);
811 int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp,
812 unsigned long *esp, unsigned long *ebx, unsigned long *edx,
813 unsigned long *ecx, unsigned long *eax, unsigned long *flags)
816 printk_debug("handleint21, eax 0x%x\n", *eax);
823 *ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
832 *ecx = (*ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
837 *ebx= (*ebx & 0xffff0000) | 2;
838 *ecx= (*ecx & 0xffff0000) | 0x401; // PAL + crt only
839 *edx= (*edx & 0xffff0000) | 0; // TV Layout - default