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 "config.h" // CONFIG_*
10
#include "farptr.h" // FLATPTR_TO_SEG
11
#include "hw/pci.h" // pci_config_readl
12
#include "hw/pcidevice.h" // foreachpci
13
#include "hw/pci_ids.h" // PCI_CLASS_DISPLAY_VGA
14
#include "hw/pci_regs.h" // PCI_ROM_ADDRESS
15
#include "malloc.h" // rom_confirm
16
#include "output.h" // dprintf
17
#include "romfile.h" // romfile_loadint
18
#include "stacks.h" // farcall16big
19
#include "std/optionrom.h" // struct rom_header
20
#include "std/pnpbios.h" // PNP_SIGNATURE
21
#include "string.h" // memset
22
#include "util.h" // get_pnp_offset
23
#include "tcgbios.h" // tpm_*
25
static int EnforceChecksum, S3ResumeVga, RunPCIroms;
28
/****************************************************************
30
****************************************************************/
32
// Execute a given option rom.
34
__callrom(struct rom_header *rom, u16 offset, u16 bdf)
36
u16 seg = FLATPTR_TO_SEG(rom);
37
dprintf(1, "Running option rom at %04x:%04x\n", seg, offset);
40
memset(&br, 0, sizeof(br));
46
br.di = get_pnp_offset();
47
br.code = SEGOFF(seg, offset);
53
// Execute a given option rom at the standard entry vector.
55
callrom(struct rom_header *rom, u16 bdf)
57
__callrom(rom, OPTION_ROM_INITVECTOR, bdf);
60
// Execute a BCV option rom registered via add_bcv().
62
call_bcv(u16 seg, u16 ip)
64
__callrom(MAKE_FLATPTR(seg, 0), ip, 0);
67
// Verify that an option rom looks valid
69
is_valid_rom(struct rom_header *rom)
71
dprintf(6, "Checking rom %p (sig %x size %d)\n"
72
, rom, rom->signature, rom->size);
73
if (rom->signature != OPTION_ROM_SIGNATURE)
77
u32 len = rom->size * 512;
78
u8 sum = checksum(rom, len);
80
dprintf(1, "Found option rom with bad checksum: loc=%p len=%d sum=%x\n"
88
// Check if a valid option rom has a pnp struct; return it if so.
89
static struct pnp_data *
90
get_pnp_rom(struct rom_header *rom)
92
struct pnp_data *pnp = (void*)((u8*)rom + rom->pnpoffset);
93
if (pnp->signature != PNP_SIGNATURE)
98
// Check for multiple pnp option rom headers.
99
static struct pnp_data *
100
get_pnp_next(struct rom_header *rom, struct pnp_data *pnp)
102
if (! pnp->nextoffset)
104
pnp = (void*)((u8*)rom + pnp->nextoffset);
105
if (pnp->signature != PNP_SIGNATURE)
110
// Check if a valid option rom has a pci struct; return it if so.
111
static struct pci_data *
112
get_pci_rom(struct rom_header *rom)
114
struct pci_data *pd = (void*)((u32)rom + rom->pcioffset);
115
if (pd->signature != PCI_ROM_SIGNATURE)
117
if (rom->pcioffset & 3)
118
dprintf(1, "WARNING! Found unaligned PCI rom (vd=%04x:%04x)\n"
119
, pd->vendor, pd->device);
123
// Run rom init code and note rom size.
125
init_optionrom(struct rom_header *rom, u16 bdf, int isvga)
127
if (! is_valid_rom(rom))
129
struct rom_header *newrom = rom_reserve(rom->size * 512);
135
memmove(newrom, rom, rom->size * 512);
137
tpm_option_rom(newrom, rom->size * 512);
139
if (isvga || get_pnp_rom(newrom))
140
// Only init vga and PnP roms here.
141
callrom(newrom, bdf);
143
return rom_confirm(newrom->size * 512);
146
#define RS_PCIROM (1LL<<33)
149
setRomSource(u64 *sources, struct rom_header *rom, u64 source)
152
sources[((u32)rom - BUILD_ROM_START) / OPTION_ROM_ALIGN] = source;
156
getRomPriority(u64 *sources, struct rom_header *rom, int instance)
158
u64 source = sources[((u32)rom - BUILD_ROM_START) / OPTION_ROM_ALIGN];
161
if (source & RS_PCIROM)
162
return bootprio_find_pci_rom((void*)(u32)source, instance);
163
struct romfile_s *file = (void*)(u32)source;
164
return bootprio_find_named_rom(file->name, instance);
168
/****************************************************************
170
****************************************************************/
172
static struct rom_header *
173
deploy_romfile(struct romfile_s *file)
175
u32 size = file->size;
176
struct rom_header *rom = rom_reserve(size);
181
int ret = file->copy(file, rom, size);
187
// Run all roms in a given CBFS directory.
189
run_file_roms(const char *prefix, int isvga, u64 *sources)
191
struct romfile_s *file = NULL;
193
file = romfile_findprefix(prefix, file);
196
struct rom_header *rom = deploy_romfile(file);
198
setRomSource(sources, rom, (u32)file);
199
init_optionrom(rom, 0, isvga);
205
/****************************************************************
207
****************************************************************/
209
// Verify device is a vga device with legacy address decoding enabled.
211
is_pci_vga(struct pci_device *pci)
213
if (pci->class != PCI_CLASS_DISPLAY_VGA)
215
u16 cmd = pci_config_readw(pci->bdf, PCI_COMMAND);
216
if (!(cmd & PCI_COMMAND_IO && cmd & PCI_COMMAND_MEMORY))
218
while (pci->parent) {
220
u32 ctrl = pci_config_readb(pci->bdf, PCI_BRIDGE_CONTROL);
221
if (!(ctrl & PCI_BRIDGE_CTL_VGA))
227
// Copy a rom to its permanent location below 1MiB
228
static struct rom_header *
229
copy_rom(struct rom_header *rom)
231
u32 romsize = rom->size * 512;
232
struct rom_header *newrom = rom_reserve(romsize);
237
dprintf(4, "Copying option rom (size %d) from %p to %p\n"
238
, romsize, rom, newrom);
239
iomemcpy(newrom, rom, romsize);
243
// Map the option rom of a given PCI device.
244
static struct rom_header *
245
map_pcirom(struct pci_device *pci)
247
dprintf(6, "Attempting to map option rom on dev %pP\n", pci);
249
if ((pci->header_type & 0x7f) != PCI_HEADER_TYPE_NORMAL) {
250
dprintf(6, "Skipping non-normal pci device (type=%x)\n"
256
u32 orig = pci_config_readl(bdf, PCI_ROM_ADDRESS);
257
pci_config_writel(bdf, PCI_ROM_ADDRESS, ~PCI_ROM_ADDRESS_ENABLE);
258
u32 sz = pci_config_readl(bdf, PCI_ROM_ADDRESS);
260
dprintf(6, "Option rom sizing returned %x %x\n", orig, sz);
261
orig &= ~PCI_ROM_ADDRESS_ENABLE;
262
if (!sz || sz == 0xffffffff)
265
if (orig == sz || (u32)(orig + 4*1024*1024) < 20*1024*1024) {
266
// Don't try to map to a pci addresses at its max, in the last
267
// 4MiB of ram, or the first 16MiB of ram.
268
dprintf(6, "Preset rom address doesn't look valid\n");
272
// Looks like a rom - enable it.
273
pci_config_writel(bdf, PCI_ROM_ADDRESS, orig | PCI_ROM_ADDRESS_ENABLE);
275
struct rom_header *rom = (void*)orig;
277
dprintf(5, "Inspecting possible rom at %p (vd=%04x:%04x bdf=%pP)\n"
278
, rom, pci->vendor, pci->device, pci);
279
if (rom->signature != OPTION_ROM_SIGNATURE) {
280
dprintf(6, "No option rom signature (got %x)\n", rom->signature);
283
struct pci_data *pd = get_pci_rom(rom);
285
dprintf(6, "No valid pci signature found\n");
289
if (pd->vendor == pci->vendor && pd->device == pci->device
290
&& pd->type == PCIROM_CODETYPE_X86)
293
dprintf(6, "Didn't match dev/ven (got %04x:%04x) or type (got %d)\n"
294
, pd->vendor, pd->device, pd->type);
295
if (pd->indicator & 0x80) {
296
dprintf(6, "No more images left\n");
299
rom = (void*)((u32)rom + pd->ilen * 512);
303
pci_config_writel(bdf, PCI_ROM_ADDRESS, orig);
306
// Not valid - restore original and exit.
307
pci_config_writel(bdf, PCI_ROM_ADDRESS, orig);
311
// Attempt to map and initialize the option rom on a given PCI device.
313
init_pcirom(struct pci_device *pci, int isvga, u64 *sources)
315
dprintf(4, "Attempting to init PCI bdf %pP (vd %04x:%04x)\n"
316
, pci, pci->vendor, pci->device);
319
snprintf(fname, sizeof(fname), "pci%04x,%04x.rom"
320
, pci->vendor, pci->device);
321
struct romfile_s *file = romfile_find(fname);
322
struct rom_header *rom = NULL;
324
rom = deploy_romfile(file);
325
else if (RunPCIroms > 1 || (RunPCIroms == 1 && isvga))
326
rom = map_pcirom(pci);
330
setRomSource(sources, rom, RS_PCIROM | (u32)pci);
331
init_optionrom(rom, pci->bdf, isvga);
335
/****************************************************************
336
* Non-VGA option rom init
337
****************************************************************/
340
optionrom_setup(void)
342
if (! CONFIG_OPTIONROMS)
345
dprintf(1, "Scan for option roms\n");
346
u64 sources[(BUILD_BIOS_ADDR - BUILD_ROM_START) / OPTION_ROM_ALIGN];
347
memset(sources, 0, sizeof(sources));
348
u32 post_vga = rom_get_last();
350
// Find and deploy PCI roms.
351
struct pci_device *pci;
353
if (pci->class == PCI_CLASS_DISPLAY_VGA || pci->have_driver)
355
init_pcirom(pci, 0, sources);
358
// Find and deploy CBFS roms not associated with a device.
359
run_file_roms("genroms/", 0, sources);
362
// All option roms found and deployed - now build BEV/BCV vectors.
365
while (pos < rom_get_last()) {
366
struct rom_header *rom = (void*)pos;
367
if (! is_valid_rom(rom)) {
368
pos += OPTION_ROM_ALIGN;
371
pos += ALIGN(rom->size * 512, OPTION_ROM_ALIGN);
372
struct pnp_data *pnp = get_pnp_rom(rom);
375
boot_add_bcv(FLATPTR_TO_SEG(rom), OPTION_ROM_INITVECTOR, 0
376
, getRomPriority(sources, rom, 0));
379
// PnP rom - check for BEV and BCV boot capabilities.
383
boot_add_bev(FLATPTR_TO_SEG(rom), pnp->bev, pnp->productname
384
, getRomPriority(sources, rom, instance++));
386
boot_add_bcv(FLATPTR_TO_SEG(rom), pnp->bcv, pnp->productname
387
, getRomPriority(sources, rom, instance++));
390
pnp = get_pnp_next(rom, pnp);
396
/****************************************************************
398
****************************************************************/
401
struct rom_header *VgaROM;
403
// Call into vga code to turn on console.
407
if (! CONFIG_OPTIONROMS)
410
dprintf(1, "Scan for VGA option rom\n");
412
// Load some config settings that impact VGA.
413
EnforceChecksum = romfile_loadint("etc/optionroms-checksum", 1);
414
S3ResumeVga = romfile_loadint("etc/s3-resume-vga-init", CONFIG_QEMU);
415
RunPCIroms = romfile_loadint("etc/pci-optionrom-exec", 2);
416
ScreenAndDebug = romfile_loadint("etc/screen-and-debug", 1);
418
// Clear option rom memory
419
memset((void*)BUILD_ROM_START, 0, rom_get_max() - BUILD_ROM_START);
421
// Find and deploy PCI VGA rom.
422
struct pci_device *pci;
424
if (!is_pci_vga(pci))
427
init_pcirom(pci, 1, NULL);
431
// Find and deploy CBFS vga-style roms not associated with a device.
432
run_file_roms("vgaroms/", 1, NULL);
435
if (rom_get_last() == BUILD_ROM_START)
439
VgaROM = (void*)BUILD_ROM_START;
440
enable_vga_console();
448
if (!VgaROM || ! is_valid_rom(VgaROM))