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Kevin O'Connor714325c2008-11-01 20:32:27 -04001// Option rom scanning code.
2//
3// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4// Copyright (C) 2002 MandrakeSoft S.A.
5//
Kevin O'Connorb1b7c2a2009-01-15 20:52:58 -05006// This file may be distributed under the terms of the GNU LGPLv3 license.
Kevin O'Connor714325c2008-11-01 20:32:27 -04007
8#include "bregs.h" // struct bregs
Kevin O'Connor35ae7262009-01-19 15:44:44 -05009#include "farptr.h" // FLATPTR_TO_SEG
Kevin O'Connorc659fde2008-12-28 23:43:20 -050010#include "config.h" // CONFIG_*
Kevin O'Connor714325c2008-11-01 20:32:27 -040011#include "util.h" // dprintf
Kevin O'Connorceea03c2008-11-08 21:36:35 -050012#include "pci.h" // pci_find_class
13#include "pci_regs.h" // PCI_ROM_ADDRESS
14#include "pci_ids.h" // PCI_CLASS_DISPLAY_VGA
Kevin O'Connorc659fde2008-12-28 23:43:20 -050015#include "boot.h" // IPL
Kevin O'Connorceea03c2008-11-08 21:36:35 -050016
17
18/****************************************************************
19 * Definitions
20 ****************************************************************/
Kevin O'Connor714325c2008-11-01 20:32:27 -040021
Kevin O'Connor714325c2008-11-01 20:32:27 -040022struct rom_header {
23 u16 signature;
24 u8 size;
25 u8 initVector[4];
26 u8 reserved[17];
27 u16 pcioffset;
28 u16 pnpoffset;
29} PACKED;
30
31struct pci_data {
32 u32 signature;
33 u16 vendor;
34 u16 device;
35 u16 vitaldata;
36 u16 dlen;
37 u8 drevision;
38 u8 class_lo;
39 u16 class_hi;
40 u16 ilen;
41 u16 irevision;
42 u8 type;
43 u8 indicator;
44 u16 reserved;
45} PACKED;
46
47struct pnp_data {
48 u32 signature;
49 u8 revision;
50 u8 len;
51 u16 nextoffset;
52 u8 reserved_08;
53 u8 checksum;
54 u32 devid;
55 u16 manufacturer;
56 u16 productname;
57 u8 type_lo;
58 u16 type_hi;
59 u8 dev_flags;
60 u16 bcv;
61 u16 dv;
62 u16 bev;
63 u16 reserved_1c;
64 u16 staticresource;
65} PACKED;
66
Kevin O'Connorceea03c2008-11-08 21:36:35 -050067#define OPTION_ROM_START 0xc0000
68#define OPTION_ROM_SIGNATURE 0xaa55
69#define OPTION_ROM_ALIGN 2048
70#define OPTION_ROM_INITVECTOR offsetof(struct rom_header, initVector[0])
Kevin O'Connor5a1b8282008-11-29 20:39:06 -050071#define PCI_ROM_SIGNATURE 0x52494350 // PCIR
Kevin O'Connor62eea672008-12-06 11:57:45 -050072#define PCIROM_CODETYPE_X86 0
Kevin O'Connorceea03c2008-11-08 21:36:35 -050073
74// Next available position for an option rom.
75static u32 next_rom;
76
77
78/****************************************************************
79 * Helper functions
80 ****************************************************************/
81
Kevin O'Connor714325c2008-11-01 20:32:27 -040082// Execute a given option rom.
83static void
Kevin O'Connore8f00ee2009-07-04 04:04:36 -040084__callrom(struct rom_header *rom, u16 offset, u16 bdf)
Kevin O'Connor714325c2008-11-01 20:32:27 -040085{
Kevin O'Connor35ae7262009-01-19 15:44:44 -050086 u16 seg = FLATPTR_TO_SEG(rom);
Kevin O'Connor91b53a72009-05-05 22:52:09 -040087 dprintf(1, "Running option rom at %04x:%04x\n", seg, offset);
Kevin O'Connor714325c2008-11-01 20:32:27 -040088
89 struct bregs br;
90 memset(&br, 0, sizeof(br));
Kevin O'Connorceea03c2008-11-08 21:36:35 -050091 br.ax = bdf;
Kevin O'Connor714325c2008-11-01 20:32:27 -040092 br.bx = 0xffff;
93 br.dx = 0xffff;
94 br.es = SEG_BIOS;
Kevin O'Connor0c3068d2008-12-21 17:51:36 -050095 br.di = get_pnp_offset();
Kevin O'Connor714325c2008-11-01 20:32:27 -040096 br.cs = seg;
97 br.ip = offset;
Kevin O'Connor6e5b4a42008-12-06 13:03:52 -050098 call16big(&br);
Kevin O'Connor714325c2008-11-01 20:32:27 -040099
100 debug_serial_setup();
Kevin O'Connor714325c2008-11-01 20:32:27 -0400101}
102
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400103// Execute a given option rom at the standard entry vector.
104static void
105callrom(struct rom_header *rom, u16 bdf)
106{
107 __callrom(rom, OPTION_ROM_INITVECTOR, bdf);
108}
109
Kevin O'Connor0a924122009-02-08 19:43:47 -0500110// Execute a BCV option rom registered via add_bcv().
111void
112call_bcv(u16 seg, u16 ip)
113{
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400114 __callrom(MAKE_FLATPTR(seg, 0), ip, 0);
Kevin O'Connor0a924122009-02-08 19:43:47 -0500115}
116
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500117// Verify that an option rom looks valid
118static int
119is_valid_rom(struct rom_header *rom)
120{
Kevin O'Connorc36273f2009-04-16 20:43:07 -0400121 dprintf(6, "Checking rom %p (sig %x size %d)\n"
122 , rom, rom->signature, rom->size);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500123 if (rom->signature != OPTION_ROM_SIGNATURE)
124 return 0;
Kevin O'Connor674e4602009-04-13 19:19:22 -0400125 if (! rom->size)
126 return 0;
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500127 u32 len = rom->size * 512;
Kevin O'Connor94fd47e2009-02-15 15:21:10 -0500128 u8 sum = checksum(rom, len);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500129 if (sum != 0) {
130 dprintf(1, "Found option rom with bad checksum: loc=%p len=%d sum=%x\n"
131 , rom, len, sum);
132 return 0;
133 }
134 return 1;
135}
136
137// Check if a valid option rom has a pnp struct; return it if so.
138static struct pnp_data *
139get_pnp_rom(struct rom_header *rom)
140{
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400141 struct pnp_data *pnp = (void*)((u8*)rom + rom->pnpoffset);
Kevin O'Connor0c3068d2008-12-21 17:51:36 -0500142 if (pnp->signature != PNP_SIGNATURE)
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500143 return NULL;
144 return pnp;
145}
146
Kevin O'Connor3f57b5c2008-12-20 23:32:16 -0500147// Check for multiple pnp option rom headers.
148static struct pnp_data *
149get_pnp_next(struct rom_header *rom, struct pnp_data *pnp)
150{
151 if (! pnp->nextoffset)
152 return NULL;
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400153 pnp = (void*)((u8*)rom + pnp->nextoffset);
Kevin O'Connor0c3068d2008-12-21 17:51:36 -0500154 if (pnp->signature != PNP_SIGNATURE)
Kevin O'Connor3f57b5c2008-12-20 23:32:16 -0500155 return NULL;
156 return pnp;
157}
158
Kevin O'Connor62eea672008-12-06 11:57:45 -0500159// Check if a valid option rom has a pci struct; return it if so.
160static struct pci_data *
161get_pci_rom(struct rom_header *rom)
162{
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400163 struct pci_data *pci = (void*)((u32)rom + rom->pcioffset);
Kevin O'Connor62eea672008-12-06 11:57:45 -0500164 if (pci->signature != PCI_ROM_SIGNATURE)
165 return NULL;
166 return pci;
167}
168
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500169// Copy a rom to its permanent location below 1MiB
170static struct rom_header *
171copy_rom(struct rom_header *rom)
172{
173 u32 romsize = rom->size * 512;
174 if (next_rom + romsize > BUILD_BIOS_ADDR) {
175 // Option rom doesn't fit.
176 dprintf(1, "Option rom %p doesn't fit.\n", rom);
177 return NULL;
178 }
Kevin O'Connorc36273f2009-04-16 20:43:07 -0400179 dprintf(4, "Copying option rom (size %d) from %p to %x\n"
180 , romsize, rom, next_rom);
Kevin O'Connor942d4952009-06-10 22:44:06 -0400181 memcpy((void*)next_rom, rom, romsize);
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400182 return (void*)next_rom;
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500183}
184
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400185// Run rom init code and note rom size.
186static int
187init_optionrom(struct rom_header *rom, u16 bdf, int isvga)
188{
189 if (! is_valid_rom(rom))
190 return -1;
191
192 if (isvga || get_pnp_rom(rom))
193 // Only init vga and PnP roms here.
194 callrom(rom, bdf);
195
196 next_rom = (u32)rom + ALIGN(rom->size * 512, OPTION_ROM_ALIGN);
197
198 return 0;
199}
200
201
202/****************************************************************
203 * Roms in CBFS
204 ****************************************************************/
205
206// Check if an option rom is at a hardcoded location or in CBFS.
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500207static struct rom_header *
Kevin O'Connor4c0c85a2009-04-11 23:31:29 -0400208lookup_hardcode(u32 vendev)
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500209{
Kevin O'Connor4c0c85a2009-04-11 23:31:29 -0400210 if (OPTIONROM_VENDEV_1
211 && ((OPTIONROM_VENDEV_1 >> 16)
212 | ((OPTIONROM_VENDEV_1 & 0xffff)) << 16) == vendev)
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400213 return copy_rom((void*)OPTIONROM_MEM_1);
Kevin O'Connor4c0c85a2009-04-11 23:31:29 -0400214 if (OPTIONROM_VENDEV_2
215 && ((OPTIONROM_VENDEV_2 >> 16)
216 | ((OPTIONROM_VENDEV_2 & 0xffff)) << 16) == vendev)
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400217 return copy_rom((void*)OPTIONROM_MEM_2);
Kevin O'Connor1edc89d2009-04-30 21:50:35 -0400218 int ret = cbfs_copy_optionrom((void*)next_rom, BUILD_BIOS_ADDR - next_rom
219 , vendev);
Kevin O'Connorcbd6ca02009-04-27 21:51:13 -0400220 if (ret < 0)
221 return NULL;
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400222 return (void*)next_rom;
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500223}
224
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400225// Run all roms in a given CBFS directory.
226static void
227run_cbfs_roms(const char *prefix, int isvga)
228{
229 struct cbfs_file *tmp = NULL;
230 for (;;) {
231 tmp = cbfs_copyfile_prefix(
232 (void*)next_rom, BUILD_BIOS_ADDR - next_rom, prefix, tmp);
233 if (!tmp)
234 break;
235 init_optionrom((void*)next_rom, 0, isvga);
236 }
237}
238
239
240/****************************************************************
241 * PCI roms
242 ****************************************************************/
243
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500244// Map the option rom of a given PCI device.
245static struct rom_header *
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400246map_pcirom(u16 bdf, u32 vendev)
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500247{
Kevin O'Connor91b53a72009-05-05 22:52:09 -0400248 dprintf(6, "Attempting to map option rom on dev %02x:%02x.%x\n"
249 , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf));
Kevin O'Connore5a36d52008-11-12 20:10:13 -0500250
Kevin O'Connor62eea672008-12-06 11:57:45 -0500251 u8 htype = pci_config_readb(bdf, PCI_HEADER_TYPE);
252 if ((htype & 0x7f) != PCI_HEADER_TYPE_NORMAL) {
253 dprintf(6, "Skipping non-normal pci device (type=%x)\n", htype);
254 return NULL;
255 }
256
Kevin O'Connorbe19cdc2008-11-09 15:33:47 -0500257 u32 orig = pci_config_readl(bdf, PCI_ROM_ADDRESS);
258 pci_config_writel(bdf, PCI_ROM_ADDRESS, ~PCI_ROM_ADDRESS_ENABLE);
259 u32 sz = pci_config_readl(bdf, PCI_ROM_ADDRESS);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500260
Kevin O'Connore5a36d52008-11-12 20:10:13 -0500261 dprintf(6, "Option rom sizing returned %x %x\n", orig, sz);
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500262 orig &= ~PCI_ROM_ADDRESS_ENABLE;
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500263 if (!sz || sz == 0xffffffff)
264 goto fail;
265
Kevin O'Connor64cf2fb2009-04-18 17:01:02 -0400266 if (orig == sz || (u32)(orig + 4*1024*1024) < 20*1024*1024) {
267 // Don't try to map to a pci addresses at its max, in the last
268 // 4MiB of ram, or the first 16MiB of ram.
Kevin O'Connor62eea672008-12-06 11:57:45 -0500269 dprintf(6, "Preset rom address doesn't look valid\n");
270 goto fail;
271 }
272
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500273 // Looks like a rom - enable it.
274 pci_config_writel(bdf, PCI_ROM_ADDRESS, orig | PCI_ROM_ADDRESS_ENABLE);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500275
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400276 struct rom_header *rom = (void*)orig;
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500277 for (;;) {
Kevin O'Connor4c0c85a2009-04-11 23:31:29 -0400278 dprintf(5, "Inspecting possible rom at %p (dv=%x bdf=%x)\n"
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500279 , rom, vendev, bdf);
280 if (rom->signature != OPTION_ROM_SIGNATURE) {
281 dprintf(6, "No option rom signature (got %x)\n", rom->signature);
282 goto fail;
283 }
Kevin O'Connor62eea672008-12-06 11:57:45 -0500284 struct pci_data *pci = get_pci_rom(rom);
285 if (! pci) {
286 dprintf(6, "No valid pci signature found\n");
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500287 goto fail;
288 }
Kevin O'Connor62eea672008-12-06 11:57:45 -0500289
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500290 u32 vd = (pci->device << 16) | pci->vendor;
Kevin O'Connor62eea672008-12-06 11:57:45 -0500291 if (vd == vendev && pci->type == PCIROM_CODETYPE_X86)
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500292 // A match
293 break;
Kevin O'Connor4c0c85a2009-04-11 23:31:29 -0400294 dprintf(6, "Didn't match dev/ven (got %x) or type (got %d)\n"
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500295 , vd, pci->type);
296 if (pci->indicator & 0x80) {
297 dprintf(6, "No more images left\n");
298 goto fail;
299 }
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400300 rom = (void*)((u32)rom + pci->ilen * 512);
Kevin O'Connore5a36d52008-11-12 20:10:13 -0500301 }
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500302
Kevin O'Connor5a1b8282008-11-29 20:39:06 -0500303 rom = copy_rom(rom);
304 pci_config_writel(bdf, PCI_ROM_ADDRESS, orig);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500305 return rom;
306fail:
307 // Not valid - restore original and exit.
Kevin O'Connorbe19cdc2008-11-09 15:33:47 -0500308 pci_config_writel(bdf, PCI_ROM_ADDRESS, orig);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500309 return NULL;
310}
311
312// Attempt to map and initialize the option rom on a given PCI device.
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400313static int
314init_pcirom(u16 bdf, int isvga)
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500315{
Kevin O'Connor4c0c85a2009-04-11 23:31:29 -0400316 u32 vendev = pci_config_readl(bdf, PCI_VENDOR_ID);
Kevin O'Connor91b53a72009-05-05 22:52:09 -0400317 dprintf(4, "Attempting to init PCI bdf %02x:%02x.%x (dev/ven %x)\n"
318 , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf)
319 , vendev);
Kevin O'Connor4c0c85a2009-04-11 23:31:29 -0400320 struct rom_header *rom = lookup_hardcode(vendev);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500321 if (! rom)
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400322 rom = map_pcirom(bdf, vendev);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500323 if (! rom)
324 // No ROM present.
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400325 return -1;
326 return init_optionrom(rom, bdf, isvga);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500327}
328
329
330/****************************************************************
331 * Non-VGA option rom init
332 ****************************************************************/
333
334void
335optionrom_setup()
Kevin O'Connor714325c2008-11-01 20:32:27 -0400336{
337 if (! CONFIG_OPTIONROMS)
338 return;
339
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500340 dprintf(1, "Scan for option roms\n");
341
342 u32 post_vga = next_rom;
343
344 if (CONFIG_OPTIONROMS_DEPLOYED) {
345 // Option roms are already deployed on the system.
346 u32 pos = next_rom;
347 while (pos < BUILD_BIOS_ADDR) {
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400348 int ret = init_optionrom((void*)pos, 0, 0);
349 if (ret)
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500350 pos += OPTION_ROM_ALIGN;
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400351 else
352 pos = next_rom;
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500353 }
354 } else {
355 // Find and deploy PCI roms.
Kevin O'Connore6338322008-11-29 20:31:49 -0500356 int bdf, max;
Kevin O'Connor4132e022008-12-04 19:39:10 -0500357 foreachpci(bdf, max) {
Kevin O'Connorbe19cdc2008-11-09 15:33:47 -0500358 u16 v = pci_config_readw(bdf, PCI_CLASS_DEVICE);
Kevin O'Connor62eea672008-12-06 11:57:45 -0500359 if (v == 0x0000 || v == 0xffff || v == PCI_CLASS_DISPLAY_VGA
360 || (CONFIG_ATA && v == PCI_CLASS_STORAGE_IDE))
Kevin O'Connorbe19cdc2008-11-09 15:33:47 -0500361 continue;
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400362 init_pcirom(bdf, 0);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500363 }
Kevin O'Connor1edc89d2009-04-30 21:50:35 -0400364
365 // Find and deploy CBFS roms not associated with a device.
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400366 run_cbfs_roms("genroms/", 0);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500367 }
368
369 // All option roms found and deployed - now build BEV/BCV vectors.
370
371 u32 pos = post_vga;
372 while (pos < next_rom) {
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400373 struct rom_header *rom = (void*)pos;
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500374 if (! is_valid_rom(rom)) {
375 pos += OPTION_ROM_ALIGN;
Kevin O'Connor714325c2008-11-01 20:32:27 -0400376 continue;
377 }
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500378 pos += ALIGN(rom->size * 512, OPTION_ROM_ALIGN);
379 struct pnp_data *pnp = get_pnp_rom(rom);
380 if (! pnp) {
Kevin O'Connor0a924122009-02-08 19:43:47 -0500381 // Legacy rom.
382 add_bcv(FLATPTR_TO_SEG(rom), OPTION_ROM_INITVECTOR, 0);
Kevin O'Connor714325c2008-11-01 20:32:27 -0400383 continue;
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500384 }
385 // PnP rom.
386 if (pnp->bev)
387 // Can boot system - add to IPL list.
Kevin O'Connor9f4e1d92009-02-08 15:44:08 -0500388 add_bev(FLATPTR_TO_SEG(rom), pnp->bev, pnp->productname);
Kevin O'Connor3f57b5c2008-12-20 23:32:16 -0500389 else
390 // Check for BCV (there may be multiple).
391 while (pnp && pnp->bcv) {
Kevin O'Connor0a924122009-02-08 19:43:47 -0500392 add_bcv(FLATPTR_TO_SEG(rom), pnp->bcv, pnp->productname);
Kevin O'Connor3f57b5c2008-12-20 23:32:16 -0500393 pnp = get_pnp_next(rom, pnp);
394 }
Kevin O'Connor714325c2008-11-01 20:32:27 -0400395 }
396}
397
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500398
399/****************************************************************
400 * VGA init
401 ****************************************************************/
402
Kevin O'Connor714325c2008-11-01 20:32:27 -0400403// Call into vga code to turn on console.
404void
405vga_setup()
406{
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500407 if (! CONFIG_OPTIONROMS)
408 return;
409
Kevin O'Connor714325c2008-11-01 20:32:27 -0400410 dprintf(1, "Scan for VGA option rom\n");
Kevin O'Connor22e1b912009-07-19 18:52:46 -0400411 VGAbdf = -1;
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500412 next_rom = OPTION_ROM_START;
413
414 if (CONFIG_OPTIONROMS_DEPLOYED) {
415 // Option roms are already deployed on the system.
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400416 init_optionrom((void*)OPTION_ROM_START, 0, 1);
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500417 } else {
418 // Find and deploy PCI VGA rom.
Kevin O'Connor22e1b912009-07-19 18:52:46 -0400419 int bdf = VGAbdf = pci_find_class(PCI_CLASS_DISPLAY_VGA);
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400420 if (bdf >= 0)
421 init_pcirom(bdf, 1);
Kevin O'Connor09880da2009-06-17 20:35:41 -0400422
423 // Find and deploy CBFS vga-style roms not associated with a device.
Kevin O'Connore8f00ee2009-07-04 04:04:36 -0400424 run_cbfs_roms("vgaroms/", 1);
425 }
426
427 if (next_rom == OPTION_ROM_START) {
428 // No VGA rom found
429 next_rom += OPTION_ROM_ALIGN;
430 return;
Kevin O'Connorceea03c2008-11-08 21:36:35 -0500431 }
Kevin O'Connor714325c2008-11-01 20:32:27 -0400432
433 dprintf(1, "Turning on vga console\n");
434 struct bregs br;
435 memset(&br, 0, sizeof(br));
436 br.ax = 0x0003;
437 call16_int(0x10, &br);
438
439 // Write to screen.
440 printf("Starting SeaBIOS\n\n");
441}
Kevin O'Connord282af72009-07-04 04:10:32 -0400442
443void
444s3_resume_vga_init()
445{
446 if (!CONFIG_S3_RESUME_VGA_INIT)
447 return;
448 struct rom_header *rom = (void*)OPTION_ROM_START;
449 if (! is_valid_rom(rom))
450 return;
451 callrom(rom, 0);
452}