1 // Option rom scanning code.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
8 #include "bregs.h" // struct bregs
9 #include "farptr.h" // FLATPTR_TO_SEG
10 #include "config.h" // CONFIG_*
11 #include "util.h" // dprintf
12 #include "pci.h" // foreachpci
13 #include "pci_regs.h" // PCI_ROM_ADDRESS
14 #include "pci_ids.h" // PCI_CLASS_DISPLAY_VGA
15 #include "boot.h" // IPL
18 /****************************************************************
20 ****************************************************************/
67 #define OPTION_ROM_SIGNATURE 0xaa55
68 #define OPTION_ROM_ALIGN 2048
69 #define OPTION_ROM_INITVECTOR offsetof(struct rom_header, initVector[0])
70 #define PCI_ROM_SIGNATURE 0x52494350 // PCIR
71 #define PCIROM_CODETYPE_X86 0
73 // The end of the last deployed rom.
77 /****************************************************************
79 ****************************************************************/
81 // Execute a given option rom.
83 __callrom(struct rom_header *rom, u16 offset, u16 bdf)
85 u16 seg = FLATPTR_TO_SEG(rom);
86 dprintf(1, "Running option rom at %04x:%04x\n", seg, offset);
89 memset(&br, 0, sizeof(br));
94 br.di = get_pnp_offset();
95 br.code = SEGOFF(seg, offset);
101 // Execute a given option rom at the standard entry vector.
103 callrom(struct rom_header *rom, u16 bdf)
105 __callrom(rom, OPTION_ROM_INITVECTOR, bdf);
108 // Execute a BCV option rom registered via add_bcv().
110 call_bcv(u16 seg, u16 ip)
112 __callrom(MAKE_FLATPTR(seg, 0), ip, 0);
115 // Verify that an option rom looks valid
117 is_valid_rom(struct rom_header *rom)
119 dprintf(6, "Checking rom %p (sig %x size %d)\n"
120 , rom, rom->signature, rom->size);
121 if (rom->signature != OPTION_ROM_SIGNATURE)
125 u32 len = rom->size * 512;
126 u8 sum = checksum(rom, len);
128 dprintf(1, "Found option rom with bad checksum: loc=%p len=%d sum=%x\n"
135 // Check if a valid option rom has a pnp struct; return it if so.
136 static struct pnp_data *
137 get_pnp_rom(struct rom_header *rom)
139 struct pnp_data *pnp = (void*)((u8*)rom + rom->pnpoffset);
140 if (pnp->signature != PNP_SIGNATURE)
145 // Check for multiple pnp option rom headers.
146 static struct pnp_data *
147 get_pnp_next(struct rom_header *rom, struct pnp_data *pnp)
149 if (! pnp->nextoffset)
151 pnp = (void*)((u8*)rom + pnp->nextoffset);
152 if (pnp->signature != PNP_SIGNATURE)
157 // Check if a valid option rom has a pci struct; return it if so.
158 static struct pci_data *
159 get_pci_rom(struct rom_header *rom)
161 struct pci_data *pci = (void*)((u32)rom + rom->pcioffset);
162 if (pci->signature != PCI_ROM_SIGNATURE)
167 // Return the memory position up to which roms may be located.
171 extern u8 code32_start[];
172 if ((u32)code32_start > BUILD_BIOS_ADDR)
173 return BUILD_BIOS_ADDR;
174 return (u32)code32_start;
177 // Copy a rom to its permanent location below 1MiB
178 static struct rom_header *
179 copy_rom(struct rom_header *rom)
181 u32 romsize = rom->size * 512;
182 if (RomEnd + romsize > max_rom()) {
183 // Option rom doesn't fit.
184 dprintf(1, "Option rom %p doesn't fit.\n", rom);
187 dprintf(4, "Copying option rom (size %d) from %p to %x\n"
188 , romsize, rom, RomEnd);
189 memcpy((void*)RomEnd, rom, romsize);
190 return (void*)RomEnd;
193 // Run rom init code and note rom size.
195 init_optionrom(struct rom_header *rom, u16 bdf, int isvga)
197 if (! is_valid_rom(rom))
200 if (isvga || get_pnp_rom(rom))
201 // Only init vga and PnP roms here.
204 RomEnd = (u32)rom + ALIGN(rom->size * 512, OPTION_ROM_ALIGN);
210 /****************************************************************
212 ****************************************************************/
214 // Check if an option rom is at a hardcoded location or in CBFS.
215 static struct rom_header *
216 lookup_hardcode(u32 vendev)
218 if (OPTIONROM_VENDEV_1
219 && ((OPTIONROM_VENDEV_1 >> 16)
220 | ((OPTIONROM_VENDEV_1 & 0xffff)) << 16) == vendev)
221 return copy_rom((void*)OPTIONROM_MEM_1);
222 if (OPTIONROM_VENDEV_2
223 && ((OPTIONROM_VENDEV_2 >> 16)
224 | ((OPTIONROM_VENDEV_2 & 0xffff)) << 16) == vendev)
225 return copy_rom((void*)OPTIONROM_MEM_2);
226 int ret = cbfs_copy_optionrom((void*)RomEnd, max_rom() - RomEnd, vendev);
229 return (void*)RomEnd;
232 // Run all roms in a given CBFS directory.
234 run_cbfs_roms(const char *prefix, int isvga)
236 struct cbfs_file *file = NULL;
238 file = cbfs_findprefix(prefix, file);
241 int ret = cbfs_copyfile(file, (void*)RomEnd, max_rom() - RomEnd);
243 init_optionrom((void*)RomEnd, 0, isvga);
248 /****************************************************************
250 ****************************************************************/
252 // Map the option rom of a given PCI device.
253 static struct rom_header *
254 map_pcirom(u16 bdf, u32 vendev)
256 dprintf(6, "Attempting to map option rom on dev %02x:%02x.%x\n"
257 , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf));
259 u8 htype = pci_config_readb(bdf, PCI_HEADER_TYPE);
260 if ((htype & 0x7f) != PCI_HEADER_TYPE_NORMAL) {
261 dprintf(6, "Skipping non-normal pci device (type=%x)\n", htype);
265 u32 orig = pci_config_readl(bdf, PCI_ROM_ADDRESS);
266 pci_config_writel(bdf, PCI_ROM_ADDRESS, ~PCI_ROM_ADDRESS_ENABLE);
267 u32 sz = pci_config_readl(bdf, PCI_ROM_ADDRESS);
269 dprintf(6, "Option rom sizing returned %x %x\n", orig, sz);
270 orig &= ~PCI_ROM_ADDRESS_ENABLE;
271 if (!sz || sz == 0xffffffff)
274 if (orig == sz || (u32)(orig + 4*1024*1024) < 20*1024*1024) {
275 // Don't try to map to a pci addresses at its max, in the last
276 // 4MiB of ram, or the first 16MiB of ram.
277 dprintf(6, "Preset rom address doesn't look valid\n");
281 // Looks like a rom - enable it.
282 pci_config_writel(bdf, PCI_ROM_ADDRESS, orig | PCI_ROM_ADDRESS_ENABLE);
284 struct rom_header *rom = (void*)orig;
286 dprintf(5, "Inspecting possible rom at %p (dv=%08x bdf=%x)\n"
288 if (rom->signature != OPTION_ROM_SIGNATURE) {
289 dprintf(6, "No option rom signature (got %x)\n", rom->signature);
292 struct pci_data *pci = get_pci_rom(rom);
294 dprintf(6, "No valid pci signature found\n");
298 u32 vd = (pci->device << 16) | pci->vendor;
299 if (vd == vendev && pci->type == PCIROM_CODETYPE_X86)
302 dprintf(6, "Didn't match dev/ven (got %08x) or type (got %d)\n"
304 if (pci->indicator & 0x80) {
305 dprintf(6, "No more images left\n");
308 rom = (void*)((u32)rom + pci->ilen * 512);
312 pci_config_writel(bdf, PCI_ROM_ADDRESS, orig);
315 // Not valid - restore original and exit.
316 pci_config_writel(bdf, PCI_ROM_ADDRESS, orig);
320 // Attempt to map and initialize the option rom on a given PCI device.
322 init_pcirom(u16 bdf, int isvga)
324 u32 vendev = pci_config_readl(bdf, PCI_VENDOR_ID);
325 dprintf(4, "Attempting to init PCI bdf %02x:%02x.%x (dev/ven %08x)\n"
326 , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf)
328 struct rom_header *rom = lookup_hardcode(vendev);
330 rom = map_pcirom(bdf, vendev);
334 return init_optionrom(rom, bdf, isvga);
338 /****************************************************************
339 * Non-VGA option rom init
340 ****************************************************************/
345 if (! CONFIG_OPTIONROMS)
348 dprintf(1, "Scan for option roms\n");
350 u32 post_vga = RomEnd;
352 if (CONFIG_OPTIONROMS_DEPLOYED) {
353 // Option roms are already deployed on the system.
355 while (pos < max_rom()) {
356 int ret = init_optionrom((void*)pos, 0, 0);
358 pos += OPTION_ROM_ALIGN;
363 // Find and deploy PCI roms.
365 foreachpci(bdf, max) {
366 u16 v = pci_config_readw(bdf, PCI_CLASS_DEVICE);
367 if (v == 0x0000 || v == 0xffff || v == PCI_CLASS_DISPLAY_VGA
368 || (CONFIG_ATA && v == PCI_CLASS_STORAGE_IDE))
373 // Find and deploy CBFS roms not associated with a device.
374 run_cbfs_roms("genroms/", 0);
377 // All option roms found and deployed - now build BEV/BCV vectors.
380 while (pos < RomEnd) {
381 struct rom_header *rom = (void*)pos;
382 if (! is_valid_rom(rom)) {
383 pos += OPTION_ROM_ALIGN;
386 pos += ALIGN(rom->size * 512, OPTION_ROM_ALIGN);
387 struct pnp_data *pnp = get_pnp_rom(rom);
390 add_bcv(FLATPTR_TO_SEG(rom), OPTION_ROM_INITVECTOR, 0);
395 // Can boot system - add to IPL list.
396 add_bev(FLATPTR_TO_SEG(rom), pnp->bev, pnp->productname);
398 // Check for BCV (there may be multiple).
399 while (pnp && pnp->bcv) {
400 add_bcv(FLATPTR_TO_SEG(rom), pnp->bcv, pnp->productname);
401 pnp = get_pnp_next(rom, pnp);
407 /****************************************************************
409 ****************************************************************/
411 // Call into vga code to turn on console.
416 RomEnd = BUILD_ROM_START;
418 if (! CONFIG_OPTIONROMS)
421 dprintf(1, "Scan for VGA option rom\n");
423 if (CONFIG_OPTIONROMS_DEPLOYED) {
424 // Option roms are already deployed on the system.
425 init_optionrom((void*)BUILD_ROM_START, 0, 1);
427 // Find and deploy PCI VGA rom.
428 int bdf = VGAbdf = pci_find_vga();
432 // Find and deploy CBFS vga-style roms not associated with a device.
433 run_cbfs_roms("vgaroms/", 1);
436 if (RomEnd == BUILD_ROM_START) {
438 RomEnd += OPTION_ROM_ALIGN;
442 dprintf(1, "Turning on vga console\n");
444 memset(&br, 0, sizeof(br));
446 call16_int(0x10, &br);
449 printf("Starting SeaBIOS (version %s)\n\n", VERSION);
455 if (!CONFIG_S3_RESUME_VGA_INIT)
457 struct rom_header *rom = (void*)BUILD_ROM_START;
458 if (! is_valid_rom(rom))