/*
* ftws_ebda_get()
* get EBDA offset so EBDA can be mmap'd
*/
off_t fwts_ebda_get(void)
{
uint16_t *ebda;
off_t ebda_addr;
if ((ebda = fwts_mmap((off_t)EBDA_OFFSET, sizeof(uint16_t))) == FWTS_MAP_FAILED) {
return FWTS_NO_EBDA;
}
ebda_addr = ((off_t)*ebda) << 4;
(void)fwts_munmap(ebda, sizeof(uint16_t));
return ebda_addr;
}
static int romdump_test1(fwts_framework *fw)
{
uint8_t *mem;
int i;
if ((mem = fwts_mmap(BIOS_ROM_REGION_START, BIOS_ROM_REGION_SIZE)) == FWTS_MAP_FAILED) {
fwts_log_error(fw, "Cannot mmap BIOS ROM region.");
return FWTS_ERROR;
}
for (i = 0; i < BIOS_ROM_REGION_SIZE; i += 512) {
/* Ensure we can safely read the memory */
if (fwts_safe_memread(mem + i, 512) != FWTS_OK)
continue;
if ((*(mem+i) == 0x55) && (*(mem+i+1) == 0xaa)) {
int length = *(mem+i+2) << 9;
fwts_log_info(fw,
"Found ROM: %x..%x (%d bytes)",
BIOS_ROM_REGION_START+i,
BIOS_ROM_REGION_START+i+length,
length);
romdump_data(fw, mem+i, BIOS_ROM_REGION_START+i, length);
fwts_log_nl(fw);
}
}
fwts_log_info(fw,
"BIOS ROM: %x..%x (%d bytes)",
BIOS_ROM_START,
BIOS_ROM_END,
BIOS_ROM_SIZE);
romdump_data(fw, mem+BIOS_ROM_OFFSET, BIOS_ROM_START, BIOS_ROM_SIZE);
fwts_infoonly(fw);
(void)fwts_munmap(mem, BIOS_ROM_REGION_SIZE);
return FWTS_OK;
}
static int ebdadump_test1(fwts_framework *fw)
{
off_t ebda_addr;
uint8_t *mem;
size_t len;
if ((ebda_addr = fwts_ebda_get()) == FWTS_NO_EBDA) {
fwts_log_error(fw, "Failed to local EBDA region.");
return FWTS_ERROR;
}
len = BIOS_ROM_START - ebda_addr;
if (ebda_addr > BIOS_ROM_START) {
fwts_log_error(fw, "EBDA start address is greater than the "
"BIOS ROM start address.");
return FWTS_ERROR;
}
if ((mem = fwts_mmap(ebda_addr, len)) == FWTS_MAP_FAILED) {
fwts_log_error(fw, "Cannot mmap BIOS ROM region.");
return FWTS_ERROR;
}
fwts_log_info(fw, "EBDA region: %" PRIx32 "..%x (%zd bytes)",
(uint32_t)ebda_addr,
BIOS_ROM_START,
len);
ebdadump_data(fw, mem, ebda_addr, len);
(void)fwts_munmap(mem, len);
fwts_infoonly(fw);
return FWTS_OK;
}
static int compare_config_space(
fwts_framework *fw,
const fwts_acpi_mcfg_configuration *config)
{
uint8_t *mapped_config_space;
uint8_t config_space[16];
size_t page_size, n;
bool match;
char path[PATH_MAX];
FILE *fp;
int i;
page_size = fwts_page_size();
/*
* Sanity check on first config, this is enough to
* see if MMIO base is OK or not
*/
snprintf(path, sizeof(path),
"/sys/bus/pci/devices/%4.4" PRIx16 ":00:00.0/config",
config->pci_segment_group_number);
if ((fp = fopen(path, "r")) == NULL) {
fwts_log_warning(fw, "Could not open %s.", path);
return FWTS_ERROR;
}
n = fread(config_space, 1, sizeof(config_space), fp);
(void)fclose(fp);
if (n != sizeof(config_space)) {
fwts_log_warning(fw, "Could only read %zd bytes from %s, expecting %zd.", n, path, sizeof(config_space));
return FWTS_ERROR;
}
if ((mapped_config_space = fwts_mmap(config->base_address, page_size)) == FWTS_MAP_FAILED) {
fwts_log_error(fw, "Cannot mmap PCI config space at 0x%" PRIx64 ".",
config->base_address);
return FWTS_ERROR;
}
/* We only need to check if just the config space is readable */
if (fwts_safe_memread(mapped_config_space, sizeof(config_space)) != FWTS_OK) {
fwts_log_error(fw, "Cannot read PCI config space at 0x%" PRIx64 ".",
config->base_address);
(void)fwts_munmap(mapped_config_space, page_size);
return FWTS_ERROR;
}
/*
* Need to explicitly do byte comparisons on region
* memcmp() fails as this can do 64 bit reads
*/
for (match = true, i = 0; i < 16; i++) {
if (config_space[i] != mapped_config_space[i]) {
match = false;
break;
}
}
(void)fwts_munmap(mapped_config_space, page_size);
if (match)
fwts_passed(fw, "PCI config space verified.");
else
fwts_failed(fw, LOG_LEVEL_MEDIUM,
"PCIConfigSpaceBad",
"PCI config space appears to not work.");
return FWTS_OK;
}
