soc/intel/xeon_sp/cpx: display FSP_PREV_BOOT_ERR_SRC_HOB

Before MRC code execution, FSP interrogates EMCA MSR registers and other
registers to see if there are fatal errors happened during previous boot
session. If there are, error records are saved into
FSP_PREV_BOOT_ERR_SRC_HOB.

When the value of Length field of FSP_PREV_BOOT_ERR_SRC_HOB is 2, that means
the HOB does not contain any valid error record.

TESTED=Injects MCE error through cscript, reboot into OS, check boot log:
0x75904d70, 0x00000400 bytes: HOB_TYPE_GUID_EXTENSION
        5138b5c5-9369-48ec-5b9738a2f7096675: FSP_PREV_BOOT_ERR_SRC_HOB_GUID
================ PREV_BOOT_ERR_SRC HOB DATA ================
hob: 0x75904d88, Length: 0x42
         MCBANK ERR INFO:
                 Segment: 0, Socket: 0, ApicId: 0x0
                 McBankNum: 0x3
                 McBankStatus: 0xfe00000000800400
                 McBankAddr: 0xf0ff
                 McBankMisc: 0xfffffff0
         MCBANK ERR INFO:
                 Segment: 0, Socket: 0, ApicId: 0x0
                 McBankNum: 0x4
                 McBankStatus: 0xfe00000000800400
                 McBankAddr: 0xfff0
                 McBankMisc: 0xfffffff0
0x75904d88: 42 00 01 00 00 00 00 00 03 00 00 04 80 00 00 00  B...............
0x75904d98: 00 fe ff f0 00 00 00 00 00 00 f0 ff ff ff 00 00  ................
0x75904da8: 00 00 01 00 00 00 00 00 04 00 00 04 80 00 00 00  ................
0x75904db8: 00 fe f0 ff 00 00 00 00 00 00 f0 ff ff ff 00 00  ................
0x75904dc8: 00 00

Change-Id: Idbace4c2500440b3c1cf2628dd921ca1a989ae81
Signed-off-by: Jonathan Zhang <jonzhang@fb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44974
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions