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mb/google/hatch/romstage_spd_smbus.c: Fix missing DIMM issue 

Since `commit 0ee9b14c09c` the SPD array is set to NULL if no
DIMM is present. This causes failure due to an unconditional use
of `blk.spd_array[i]`, : i={0,1}.

This validates the spd_array is non-NULL before use otherwise it
sets the DIMM as not present.


Puff fails boot with the following log:

```
 ...
SPD: banks 16, ranks 2, rows 16, columns 10, density 8192 Mb
SPD: device width 8 bits, bus width 64 bits
SPD: module size is 16384 MB (per channel)
ASSERTION ERROR: file 'src/soc/intel/cannonlake/cnl_memcfg_init.c', line 47
```

BUG=b:155220125
BRANCH=none
TEST=none

Change-Id: I5f47c849344951d53fa8c67e779b7c46d632d124
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40820
Reviewed-by: Jamie Chen <jamie.chen@intel.com>
Reviewed-by: Sam McNally <sammc@google.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Daniel Kurtz <djkurtz@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Edward O'Callaghan 2020-04-29 14:05:52 +10:00 committed by Edward O'Callaghan
parent 4667322628
commit 10757897c0
1 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/mainboard/google/hatch/romstage_spd_smbus.c
View File

@ -18,15 +18,24 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
/* Access memory info through SMBUS. */
get_spd_smbus(&blk);
memcfg.spd[0].read_type = READ_SPD_MEMPTR;
memcfg.spd[0].spd_spec.spd_data_ptr_info.spd_data_len = blk.len;
memcfg.spd[0].spd_spec.spd_data_ptr_info.spd_data_ptr = (uintptr_t)blk.spd_array[0];
if (blk.spd_array[0] == NULL) {
memcfg.spd[0].read_type = NOT_EXISTING;
} else {
memcfg.spd[0].read_type = READ_SPD_MEMPTR;
memcfg.spd[0].spd_spec.spd_data_ptr_info.spd_data_len = blk.len;
memcfg.spd[0].spd_spec.spd_data_ptr_info.spd_data_ptr = (uintptr_t)blk.spd_array[0];
}
memcfg.spd[1].read_type = NOT_EXISTING;
memcfg.spd[2].read_type = READ_SPD_MEMPTR;
memcfg.spd[2].spd_spec.spd_data_ptr_info.spd_data_len = blk.len;
memcfg.spd[2].spd_spec.spd_data_ptr_info.spd_data_ptr = (uintptr_t)blk.spd_array[1];
if (blk.spd_array[1] == NULL) {
memcfg.spd[2].read_type = NOT_EXISTING;
} else {
memcfg.spd[2].read_type = READ_SPD_MEMPTR;
memcfg.spd[2].spd_spec.spd_data_ptr_info.spd_data_len = blk.len;
memcfg.spd[2].spd_spec.spd_data_ptr_info.spd_data_ptr = (uintptr_t)blk.spd_array[1];
}
memcfg.spd[3].read_type = NOT_EXISTING;
dump_spd_info(&blk);