/* Helper to load a VPD LID. Pass a ptr to the corresponding LX keyword */
static void *vpd_lid_preload(const uint8_t *lx)
{
int rc;
/* Now this is a guess game as we don't have the info from the
* pHyp folks. But basically, it seems to boil down to loading
* a LID whose name is 0x80e000yy where yy is the last 2 digits
* of the LX record in hex.
*
* [ Correction: After a chat with some folks, it looks like it's
* actually 4 digits, though the lid number is limited to fff
* so we weren't far off. ]
*
* For safety, we look for a matching LX record in an LXRn
* (n = lxrn argument) or in VINI if lxrn=0xff
*/
vpd_lid_no = 0x80e00000 | ((lx[6] & 0xf) << 8) | lx[7];
/* We don't quite know how to get to the LID directory so
* we don't know the size. Let's allocate 16K. All the VPD LIDs
* I've seen so far are much smaller.
*/
#define VPD_LID_MAX_SIZE 0x4000
vpd_lid = malloc(VPD_LID_MAX_SIZE);
if (!vpd_lid) {
prerror("VPD: Failed to allocate memory for LID\n");
return NULL;
}
/* Adjust LID number for flash side */
vpd_lid_no = fsp_adjust_lid_side(vpd_lid_no);
printf("VPD: Trying to load VPD LID 0x%08x...\n", vpd_lid_no);
vpd_lid_size = VPD_LID_MAX_SIZE;
/* Load it from the FSP */
rc = fsp_preload_lid(vpd_lid_no, vpd_lid, &vpd_lid_size);
if (rc) {
prerror("VPD: Error %d loading VPD LID\n", rc);
goto fail;
}
return vpd_lid;
fail:
free(vpd_lid);
return NULL;
}
/* Helper to load a VPD LID. Pass a ptr to the corresponding LX keyword */
static void *vpd_lid_load(const uint8_t *lx, uint8_t lxrn, size_t *size)
{
/* Now this is a guess game as we don't have the info from the
* pHyp folks. But basically, it seems to boil down to loading
* a LID whose name is 0x80e000yy where yy is the last 2 digits
* of the LX record in hex.
*
* [ Correction: After a chat with some folks, it looks like it's
* actually 4 digits, though the lid number is limited to fff
* so we weren't far off. ]
*
* For safety, we look for a matching LX record in an LXRn
* (n = lxrn argument) or in VINI if lxrn=0xff
*/
uint32_t lid_no = 0x80e00000 | ((lx[6] & 0xf) << 8) | lx[7];
/* We don't quite know how to get to the LID directory so
* we don't know the size. Let's allocate 16K. All the VPD LIDs
* I've seen so far are much smaller.
*/
#define VPD_LID_MAX_SIZE 0x4000
void *data = malloc(VPD_LID_MAX_SIZE);
char record[4] = "LXR0";
const void *valid_lx;
uint8_t lx_size;
int rc;
if (!data) {
prerror("VPD: Failed to allocate memory for LID\n");
return NULL;
}
/* Adjust LID number for flash side */
lid_no = fsp_adjust_lid_side(lid_no);
printf("VPD: Trying to load VPD LID 0x%08x...\n", lid_no);
*size = VPD_LID_MAX_SIZE;
/* Load it from the FSP */
rc = fsp_fetch_data(0, FSP_DATASET_NONSP_LID, lid_no, 0, data, size);
if (rc) {
prerror("VPD: Error %d loading VPD LID\n", rc);
goto fail;
}
/* Validate it */
if (lxrn < 9)
record[3] = '0' + lxrn;
else
memcpy(record, "VINI", 4);
valid_lx = vpd_find(data, *size, record, "LX", &lx_size);
if (!valid_lx || lx_size != 8) {
prerror("VPD: Cannot find validation LX record\n");
goto fail;
}
if (memcmp(valid_lx, lx, 8) != 0) {
prerror("VPD: LX record mismatch !\n");
goto fail;
}
printf("VPD: Loaded %zu bytes\n", *size);
/* Got it ! */
return realloc(data, *size);
fail:
free(data);
return NULL;
}
