Page MenuHomeFreeBSD
Differential D52506 Diff 162332 sys/x86/x86/ucode_subr.c

Changeset View

Standalone View

View Options

sys/x86/x86/ucode_subr.c

Show First 20 Lines • Show All 88 Lines • ▼ Show 20 Lines
#define AMD_10H_uCODE_TYPE 1 #define AMD_10H_uCODE_TYPE 1
/* /*
* NB: the format of microcode update files is not documented by AMD. * NB: the format of microcode update files is not documented by AMD.
* It has been reverse engineered from studying Coreboot, illumos and Linux * It has been reverse engineered from studying Coreboot, illumos and Linux
* source code. * source code.
*/ */
const void * const void *
ucode_amd_find(const char *path, uint32_t signature, uint32_t revision, ucode_amd_find(const char *path, uint32_t signature, uint32_t *revision,
const uint8_t *fw_data, size_t fw_size, size_t *selected_sizep) const uint8_t *fw_data, size_t fw_size, size_t *selected_sizep)
{ {
const amd_10h_fw_header_t *fw_header; const amd_10h_fw_header_t *fw_header;
const amd_10h_fw_header_t *selected_fw; const amd_10h_fw_header_t *selected_fw;
const equiv_cpu_entry_t *equiv_cpu_table; const equiv_cpu_entry_t *equiv_cpu_table;
const section_header_t *section_header; const section_header_t *section_header;
const container_header_t *container_header; const container_header_t *container_header;
size_t selected_size; size_t selected_size;
uint16_t equiv_id; uint16_t equiv_id;
int i; int i;
WARNX(1, "found cpu family %#x model %#x " WARNX(1, "found cpu family %#x model %#x "
"stepping %#x extfamily %#x extmodel %#x.", "stepping %#x extfamily %#x extmodel %#x.",
((signature >> 8) & 0x0f) + ((signature >> 20) & 0xff), ((signature >> 8) & 0x0f) + ((signature >> 20) & 0xff),
(signature >> 4) & 0x0f, (signature >> 4) & 0x0f,
(signature >> 0) & 0x0f, (signature >> 20) & 0xff, (signature >> 0) & 0x0f, (signature >> 20) & 0xff,
(signature >> 16) & 0x0f); (signature >> 16) & 0x0f);
WARNX(1, "microcode revision %#x", revision); WARNX(1, "microcode revision %#x", *revision);
nextfile: nextfile:
WARNX(1, "checking %s for update.", path); WARNX(1, "checking %s for update.", path);
WARNX(3, "processing next container file"); WARNX(3, "processing next container file");
if (fw_size < if (fw_size <
(sizeof(*container_header) + sizeof(*section_header))) { (sizeof(*container_header) + sizeof(*section_header))) {
WARNX(2, "file too short: %s", path); WARNX(2, "file too short: %s", path);
return (NULL); return (NULL);
▲ Show 20 Lines • Show All 83 Lines • ▼ Show 20 Lines while (fw_size >= sizeof(*section_header)) {
fw_data += section_header->size; fw_data += section_header->size;
fw_size -= section_header->size; fw_size -= section_header->size;
if (fw_header->processor_rev_id != equiv_id) { if (fw_header->processor_rev_id != equiv_id) {
WARNX(1, "firmware processor_rev_id %x, equiv_id %x", WARNX(1, "firmware processor_rev_id %x, equiv_id %x",
fw_header->processor_rev_id, equiv_id); fw_header->processor_rev_id, equiv_id);
continue; /* different cpu */ continue; /* different cpu */
} }
if (fw_header->patch_id <= revision) { if (fw_header->patch_id <= *revision) {
WARNX(1, "patch_id %x, revision %x", WARNX(1, "patch_id %x, revision %x",
fw_header->patch_id, revision); fw_header->patch_id, *revision);
continue; /* not newer revision */ continue; /* not newer revision */
} }
if (fw_header->nb_dev_id != 0 || fw_header->sb_dev_id != 0) { if (fw_header->nb_dev_id != 0 || fw_header->sb_dev_id != 0) {
WARNX(2, "Chipset-specific microcode is not supported"); WARNX(2, "Chipset-specific microcode is not supported");
} }
WARNX(3, "selecting revision: %x", fw_header->patch_id); WARNX(3, "selecting revision: %x", fw_header->patch_id);
revision = fw_header->patch_id; *revision = fw_header->patch_id;
selected_fw = fw_header; selected_fw = fw_header;
selected_size = section_header->size; selected_size = section_header->size;
} }
if (fw_size != 0) { if (fw_size != 0) {
WARNX(2, "%s is not a valid amd firmware: " WARNX(2, "%s is not a valid amd firmware: "
"file is truncated", path); "file is truncated", path);
selected_fw = NULL; selected_fw = NULL;
} }
found: found:
*selected_sizep = selected_size; *selected_sizep = selected_size;
return (selected_fw); return (selected_fw);
} }