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util/amdfwtool/amdfwread: Update relative_offset function 

* AMD_ADDR_PHYSICAL refers to physical address in the memory map
* AMD_ADDR_REL_BIOS is relative to the start of the BIOS image
* AMD_ADDR_REL_TAB is relative to the start of concerned PSP or BIOS
tables

Update the relative_offset implementation accordingly. Though
AMD_ADDR_REL_SLOT is defined it is not used. Removing that to simplify
the relative_offset implementation so that it can be used for both PSP
and BIOS firmware tables. Hence update the relative_offset function
signature as well.

BUG=None
TEST=Build and use amdfwread to read the Soft-fuse bits from Guybrush
BIOS image. Observed no changes before and after the changes.

Change-Id: I74603dd08eda87393c14b746c4435eaf2bb34126
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66572
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
This commit is contained in:
Karthikeyan Ramasubramanian 2022-08-08 22:14:27 -06:00 committed by Raul Rangel
parent e33377250c
commit 852c5dc101
1 changed files with 28 additions and 20 deletions
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46
util/amdfwtool/amdfwread.c
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@ -10,6 +10,7 @@
/* An address can be relative to the image/file start but it can also be the address when
* the image is mapped at 0xff000000. Used to ensure that we only attempt to read within
* the limits of the file. */
#define SPI_ROM_BASE 0xff000000
#define FILE_REL_MASK 0xffffff
#define ERR(...) fprintf(stderr, __VA_ARGS__)
@ -24,28 +25,35 @@ const uint32_t fw_header_offsets[] = {
};
/* Converts addresses to be relative to the start of the file */
static uint64_t relative_offset(const psp_directory_header *header, uint32_t header_offset,
const psp_directory_entry *entry, size_t entry_index)
static uint64_t relative_offset(uint32_t header_offset, uint64_t addr, uint64_t mode)
{
amd_addr_mode mode = header->additional_info_fields.address_mode;
if (mode == AMD_ADDR_REL_BIOS) {
/* Entry address mode override directory mode with this value */
mode = entry->address_mode;
}
switch (mode) {
case AMD_ADDR_REL_BIOS:
return entry->addr + header_offset;
/* Since this utility operates on the BIOS file, physical address is converted
relative to the start of the BIOS file. */
case AMD_ADDR_PHYSICAL:
if (addr < SPI_ROM_BASE || addr > (SPI_ROM_BASE + FILE_REL_MASK)) {
ERR("Invalid address(%lx) or mode(%lx)\n", addr, mode);
/* TODO: fix amdfwtool to program the right address/mode. In guybrush,
* lots of addresses are marked as physical, but they are relative to
* BIOS. Until that is fixed, just leave an error message. */
// exit(1);
}
return addr & FILE_REL_MASK;
case AMD_ADDR_REL_SLOT:
return entry->addr + header_offset + sizeof(psp_directory_header) +
entry_index * sizeof(psp_directory_entry);
case AMD_ADDR_REL_BIOS:
if (addr > FILE_REL_MASK) {
ERR("Invalid address(%lx) or mode(%lx)\n", addr, mode);
exit(1);
}
return addr & FILE_REL_MASK;
case AMD_ADDR_REL_TAB:
return addr + header_offset;
default:
break;
ERR("Unsupported mode %lu\n", mode);
exit(1);
}
return entry->addr & FILE_REL_MASK;
}
static int read_fw_header(FILE *fw, uint32_t offset, embedded_firmware *fw_header)
@ -120,9 +128,10 @@ static int read_soft_fuse(FILE *fw, const embedded_firmware *fw_header)
for (size_t i = 0; i < num_current_entries; i++) {
uint32_t type = current_entries[i].type;
if (type == AMD_PSP_FUSE_CHAIN) {
uint64_t mode = current_entries[i].address_mode;
uint64_t addr = current_entries[i].addr;
if (type == AMD_PSP_FUSE_CHAIN) {
uint64_t fuse = mode << 62 | addr;
printf("Soft-fuse:0x%lx\n", fuse);
@ -132,8 +141,7 @@ static int read_soft_fuse(FILE *fw, const embedded_firmware *fw_header)
if (l2_dir_offset != 0)
return 1;
l2_dir_offset = relative_offset(&header, psp_offset,
&current_entries[i], i);
l2_dir_offset = relative_offset(psp_offset, addr, mode);
}
}