diff options
| author | Meera Ravindranath <meera.ravindranath@intel.com> | 2021-02-22 09:53:43 +0530 |
|---|---|---|
| committer | Tim Wawrzynczak <twawrzynczak@chromium.org> | 2021-07-13 14:30:07 +0000 |
| commit | 91a1276d532bb94bfa1ed0d50fbc71de67776f2d (patch) | |
| tree | baae162c542922031dc0f0fa4e1e7ade140989c1 /src/soc/intel | |
| parent | 82225b81f8e4e07268e229e51863ecc706eb9b98 (diff) | |
soc/intel/alderlake: Implement WA for DDR5 DIMM modules
The coreboot SMBus driver requires additional changes to accomodate
the DDR5 EEPROM read which has resulted in a broken code flow for boot.
This CL serves as a temp WA to let FSP perform the SPD read for DDR5
and pass SPD addresses to FSP UPD array.
BUG=b:180458099
TEST=Build and boot DDR5 adlrvp to OS
Signed-off-by: Meera Ravindranath <meera.ravindranath@intel.com>
Change-Id: I9998bfcd12b81c11fcc9f791da2a27d3c788e48a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50996
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel')
| -rw-r--r-- | src/soc/intel/alderlake/meminit.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/meminit.c b/src/soc/intel/alderlake/meminit.c index 32496ce773..44071db59b 100644 --- a/src/soc/intel/alderlake/meminit.c +++ b/src/soc/intel/alderlake/meminit.c @@ -217,6 +217,22 @@ static void mem_init_dqs_upds(FSP_M_CONFIG *mem_cfg, const struct mem_channel_da mem_init_dq_dqs_upds(dqs_upds, mb_cfg->dqs_map, upd_size, data, auto_detect); } +#define DDR5_CH_DIMM_OFFSET(ch, dimm) ((ch) * CONFIG_DIMMS_PER_CHANNEL + (dimm)) + +static void ddr5_fill_dimm_module_info(FSP_M_CONFIG *mem_cfg, const struct mb_cfg *mb_cfg, + const struct mem_spd *spd_info) +{ + for (size_t ch = 0; ch < soc_mem_cfg[MEM_TYPE_DDR5].num_phys_channels; ch++) { + for (size_t dimm = 0; dimm < CONFIG_DIMMS_PER_CHANNEL; dimm++) { + size_t mrc_ch = soc_mem_cfg[MEM_TYPE_DDR5].phys_to_mrc_map[ch]; + mem_cfg->SpdAddressTable[DDR5_CH_DIMM_OFFSET(mrc_ch, dimm)] = + spd_info->smbus[ch].addr_dimm[dimm] << 1; + } + } + mem_init_dq_upds(mem_cfg, NULL, mb_cfg, true); + mem_init_dqs_upds(mem_cfg, NULL, mb_cfg, true); +} + void memcfg_init(FSP_M_CONFIG *mem_cfg, const struct mb_cfg *mb_cfg, const struct mem_spd *spd_info, bool half_populated) { @@ -235,9 +251,20 @@ void memcfg_init(FSP_M_CONFIG *mem_cfg, const struct mb_cfg *mb_cfg, switch (mb_cfg->type) { case MEM_TYPE_DDR4: + meminit_ddr(mem_cfg, &mb_cfg->ddr_config); + dq_dqs_auto_detect = true; + break; case MEM_TYPE_DDR5: meminit_ddr(mem_cfg, &mb_cfg->ddr_config); dq_dqs_auto_detect = true; + /* + * TODO: Drop this workaround once SMBus driver in coreboot is updated to + * support DDR5 EEPROM reading. + */ + if (spd_info->topo == MEM_TOPO_DIMM_MODULE) { + ddr5_fill_dimm_module_info(mem_cfg, mb_cfg, spd_info); + return; + } break; case MEM_TYPE_LP4X: meminit_lp4x(mem_cfg); |