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));
95 br.di = get_pnp_offset();
96 br.code = SEGOFF(seg, offset);
101 debug_serial_setup();
104 // Execute a given option rom at the standard entry vector.
106 callrom(struct rom_header *rom, u16 bdf)
108 __callrom(rom, OPTION_ROM_INITVECTOR, bdf);
111 // Execute a BCV option rom registered via add_bcv().
113 call_bcv(u16 seg, u16 ip)
115 __callrom(MAKE_FLATPTR(seg, 0), ip, 0);
118 // Verify that an option rom looks valid
120 is_valid_rom(struct rom_header *rom)
122 dprintf(6, "Checking rom %p (sig %x size %d)\n"
123 , rom, rom->signature, rom->size);
124 if (rom->signature != OPTION_ROM_SIGNATURE)
128 u32 len = rom->size * 512;
129 u8 sum = checksum(rom, len);
131 dprintf(1, "Found option rom with bad checksum: loc=%p len=%d sum=%x\n"
138 // Check if a valid option rom has a pnp struct; return it if so.
139 static struct pnp_data *
140 get_pnp_rom(struct rom_header *rom)
142 struct pnp_data *pnp = (void*)((u8*)rom + rom->pnpoffset);
143 if (pnp->signature != PNP_SIGNATURE)
148 // Check for multiple pnp option rom headers.
149 static struct pnp_data *
150 get_pnp_next(struct rom_header *rom, struct pnp_data *pnp)
152 if (! pnp->nextoffset)
154 pnp = (void*)((u8*)rom + pnp->nextoffset);
155 if (pnp->signature != PNP_SIGNATURE)
160 // Check if a valid option rom has a pci struct; return it if so.
161 static struct pci_data *
162 get_pci_rom(struct rom_header *rom)
164 struct pci_data *pci = (void*)((u32)rom + rom->pcioffset);
165 if (pci->signature != PCI_ROM_SIGNATURE)
170 // Return the memory position up to which roms may be located.
174 extern u8 code32_start[];
175 if ((u32)code32_start > BUILD_BIOS_ADDR)
176 return BUILD_BIOS_ADDR;
177 return (u32)code32_start;
180 // Copy a rom to its permanent location below 1MiB
181 static struct rom_header *
182 copy_rom(struct rom_header *rom)
184 u32 romsize = rom->size * 512;
185 if (RomEnd + romsize > max_rom()) {
186 // Option rom doesn't fit.
187 dprintf(1, "Option rom %p doesn't fit.\n", rom);
190 dprintf(4, "Copying option rom (size %d) from %p to %x\n"
191 , romsize, rom, RomEnd);
192 iomemcpy((void*)RomEnd, rom, romsize);
193 return (void*)RomEnd;
196 // Run rom init code and note rom size.
198 init_optionrom(struct rom_header *rom, u16 bdf, int isvga)
200 if (! is_valid_rom(rom))
203 if (isvga || get_pnp_rom(rom))
204 // Only init vga and PnP roms here.
207 RomEnd = (u32)rom + ALIGN(rom->size * 512, OPTION_ROM_ALIGN);
213 /****************************************************************
215 ****************************************************************/
217 // Check if an option rom is at a hardcoded location or in CBFS.
218 static struct rom_header *
219 lookup_hardcode(u32 vendev)
221 if (OPTIONROM_VENDEV_1
222 && ((OPTIONROM_VENDEV_1 >> 16)
223 | ((OPTIONROM_VENDEV_1 & 0xffff)) << 16) == vendev)
224 return copy_rom((void*)OPTIONROM_MEM_1);
225 if (OPTIONROM_VENDEV_2
226 && ((OPTIONROM_VENDEV_2 >> 16)
227 | ((OPTIONROM_VENDEV_2 & 0xffff)) << 16) == vendev)
228 return copy_rom((void*)OPTIONROM_MEM_2);
229 int ret = cbfs_copy_optionrom((void*)RomEnd, max_rom() - RomEnd, vendev);
232 return (void*)RomEnd;
235 // Run all roms in a given CBFS directory.
237 run_cbfs_roms(const char *prefix, int isvga)
239 struct cbfs_file *file = NULL;
241 file = cbfs_findprefix(prefix, file);
244 int ret = cbfs_copyfile(file, (void*)RomEnd, max_rom() - RomEnd);
246 init_optionrom((void*)RomEnd, 0, isvga);
251 /****************************************************************
253 ****************************************************************/
255 // Map the option rom of a given PCI device.
256 static struct rom_header *
257 map_pcirom(u16 bdf, u32 vendev)
259 dprintf(6, "Attempting to map option rom on dev %02x:%02x.%x\n"
260 , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf));
262 u8 htype = pci_config_readb(bdf, PCI_HEADER_TYPE);
263 if ((htype & 0x7f) != PCI_HEADER_TYPE_NORMAL) {
264 dprintf(6, "Skipping non-normal pci device (type=%x)\n", htype);
268 u32 orig = pci_config_readl(bdf, PCI_ROM_ADDRESS);
269 pci_config_writel(bdf, PCI_ROM_ADDRESS, ~PCI_ROM_ADDRESS_ENABLE);
270 u32 sz = pci_config_readl(bdf, PCI_ROM_ADDRESS);
272 dprintf(6, "Option rom sizing returned %x %x\n", orig, sz);
273 orig &= ~PCI_ROM_ADDRESS_ENABLE;
274 if (!sz || sz == 0xffffffff)
277 if (orig == sz || (u32)(orig + 4*1024*1024) < 20*1024*1024) {
278 // Don't try to map to a pci addresses at its max, in the last
279 // 4MiB of ram, or the first 16MiB of ram.
280 dprintf(6, "Preset rom address doesn't look valid\n");
284 // Looks like a rom - enable it.
285 pci_config_writel(bdf, PCI_ROM_ADDRESS, orig | PCI_ROM_ADDRESS_ENABLE);
287 struct rom_header *rom = (void*)orig;
289 dprintf(5, "Inspecting possible rom at %p (dv=%08x bdf=%x)\n"
291 if (rom->signature != OPTION_ROM_SIGNATURE) {
292 dprintf(6, "No option rom signature (got %x)\n", rom->signature);
295 struct pci_data *pci = get_pci_rom(rom);
297 dprintf(6, "No valid pci signature found\n");
301 u32 vd = (pci->device << 16) | pci->vendor;
302 if (vd == vendev && pci->type == PCIROM_CODETYPE_X86)
305 dprintf(6, "Didn't match dev/ven (got %08x) or type (got %d)\n"
307 if (pci->indicator & 0x80) {
308 dprintf(6, "No more images left\n");
311 rom = (void*)((u32)rom + pci->ilen * 512);
315 pci_config_writel(bdf, PCI_ROM_ADDRESS, orig);
318 // Not valid - restore original and exit.
319 pci_config_writel(bdf, PCI_ROM_ADDRESS, orig);
323 // Attempt to map and initialize the option rom on a given PCI device.
325 init_pcirom(u16 bdf, int isvga)
327 u32 vendev = pci_config_readl(bdf, PCI_VENDOR_ID);
328 dprintf(4, "Attempting to init PCI bdf %02x:%02x.%x (dev/ven %08x)\n"
329 , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf)
331 struct rom_header *rom = lookup_hardcode(vendev);
333 rom = map_pcirom(bdf, vendev);
337 return init_optionrom(rom, bdf, isvga);
341 /****************************************************************
342 * Non-VGA option rom init
343 ****************************************************************/
348 if (! CONFIG_OPTIONROMS)
351 dprintf(1, "Scan for option roms\n");
353 u32 post_vga = RomEnd;
355 if (CONFIG_OPTIONROMS_DEPLOYED) {
356 // Option roms are already deployed on the system.
358 while (pos < max_rom()) {
359 int ret = init_optionrom((void*)pos, 0, 0);
361 pos += OPTION_ROM_ALIGN;
366 // Find and deploy PCI roms.
368 foreachpci(bdf, max) {
369 u16 v = pci_config_readw(bdf, PCI_CLASS_DEVICE);
370 if (v == 0x0000 || v == 0xffff || v == PCI_CLASS_DISPLAY_VGA
371 || (CONFIG_ATA && v == PCI_CLASS_STORAGE_IDE))
376 // Find and deploy CBFS roms not associated with a device.
377 run_cbfs_roms("genroms/", 0);
380 // All option roms found and deployed - now build BEV/BCV vectors.
383 while (pos < RomEnd) {
384 struct rom_header *rom = (void*)pos;
385 if (! is_valid_rom(rom)) {
386 pos += OPTION_ROM_ALIGN;
389 pos += ALIGN(rom->size * 512, OPTION_ROM_ALIGN);
390 struct pnp_data *pnp = get_pnp_rom(rom);
393 add_bcv(FLATPTR_TO_SEG(rom), OPTION_ROM_INITVECTOR, 0);
398 // Can boot system - add to IPL list.
399 add_bev(FLATPTR_TO_SEG(rom), pnp->bev, pnp->productname);
401 // Check for BCV (there may be multiple).
402 while (pnp && pnp->bcv) {
403 add_bcv(FLATPTR_TO_SEG(rom), pnp->bcv, pnp->productname);
404 pnp = get_pnp_next(rom, pnp);
410 /****************************************************************
412 ****************************************************************/
414 // Call into vga code to turn on console.
419 RomEnd = BUILD_ROM_START;
421 if (! CONFIG_OPTIONROMS)
424 dprintf(1, "Scan for VGA option rom\n");
426 if (CONFIG_OPTIONROMS_DEPLOYED) {
427 // Option roms are already deployed on the system.
428 init_optionrom((void*)BUILD_ROM_START, 0, 1);
430 // Find and deploy PCI VGA rom.
431 int bdf = VGAbdf = pci_find_vga();
435 // Find and deploy CBFS vga-style roms not associated with a device.
436 run_cbfs_roms("vgaroms/", 1);
439 if (RomEnd == BUILD_ROM_START) {
441 RomEnd += OPTION_ROM_ALIGN;
445 dprintf(1, "Turning on vga console\n");
447 memset(&br, 0, sizeof(br));
450 call16_int(0x10, &br);
453 printf("Starting SeaBIOS (version %s)\n\n", VERSION);
459 if (!CONFIG_S3_RESUME_VGA_INIT)
461 struct rom_header *rom = (void*)BUILD_ROM_START;
462 if (! is_valid_rom(rom))