From 4f771fe98b893f03703e9081a29d08459111c2b2 Mon Sep 17 00:00:00 2001 From: Marco Chen Date: Fri, 10 Apr 2020 14:33:19 +0800 Subject: soc/intel/jasperlake: Allow mainboard to override DRAM part number In order to support mainboards that do not store DRAM part number in the traditional way i.e. within the CBFS SPD for soldered memory, this change provides a runtime callback to allow mainboards to provide DRAM part number from a custom location e.g. external EEPROM on dedede. For other boards it should be a NOP since the weak implementation of mainboard_get_dram_part_num does nothing. BUG=b:152019429 Change-Id: I7ba635f5504ba288308d7d7a4935f405f289aa8d Signed-off-by: Marco Chen Reviewed-on: https://review.coreboot.org/c/coreboot/+/40302 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/soc/intel/jasperlake/include/soc/romstage.h | 2 ++ src/soc/intel/jasperlake/romstage/romstage.c | 21 +++++++++++++++++++++ 2 files changed, 23 insertions(+) (limited to 'src/soc/intel/jasperlake') diff --git a/src/soc/intel/jasperlake/include/soc/romstage.h b/src/soc/intel/jasperlake/include/soc/romstage.h index 4a4fbe63b8..e3c7969127 100644 --- a/src/soc/intel/jasperlake/include/soc/romstage.h +++ b/src/soc/intel/jasperlake/include/soc/romstage.h @@ -6,6 +6,8 @@ #include +/* Provide a callback to allow mainboard to override the DRAM part number. */ +bool mainboard_get_dram_part_num(const char **part_num, size_t *len); void mainboard_memory_init_params(FSPM_UPD *mupd); void systemagent_early_init(void); void pch_init(void); diff --git a/src/soc/intel/jasperlake/romstage/romstage.c b/src/soc/intel/jasperlake/romstage/romstage.c index fa9db6e29e..b8e9032e97 100644 --- a/src/soc/intel/jasperlake/romstage/romstage.c +++ b/src/soc/intel/jasperlake/romstage/romstage.c @@ -22,6 +22,12 @@ 0x8d, 0x09, 0x11, 0xcf, 0x8b, 0x9f, 0x03, 0x23 \ } +bool __weak mainboard_get_dram_part_num(const char **part_num, size_t *len) +{ + /* Default weak implementation, no need to override part number. */ + return false; +} + /* Save the DIMM information for SMBIOS table 17 */ static void save_dimm_info(void) { @@ -36,6 +42,9 @@ static void save_dimm_info(void) const uint8_t smbios_memory_info_guid[16] = FSP_SMBIOS_MEMORY_INFO_GUID; const uint8_t *serial_num; + const char *dram_part_num = NULL; + size_t dram_part_num_len; + bool is_dram_part_overridden = false; /* Locate the memory info HOB, presence validated by raminit */ meminfo_hob = fsp_find_extension_hob_by_guid( @@ -57,6 +66,10 @@ static void save_dimm_info(void) } memset(mem_info, 0, sizeof(*mem_info)); + /* Allow mainboard to override DRAM part number. */ + is_dram_part_overridden = mainboard_get_dram_part_num(&dram_part_num, + &dram_part_num_len); + /* Save available DIMM information */ index = 0; dimm_max = ARRAY_SIZE(mem_info->dimm); @@ -75,6 +88,14 @@ static void save_dimm_info(void) if (src_dimm->Status != DIMM_PRESENT) continue; + /* If there is no DRAM part number overridden by + * mainboard then use original one. */ + if (!is_dram_part_overridden) { + dram_part_num_len = sizeof(src_dimm->ModulePartNum); + dram_part_num = (const char *) + &src_dimm->ModulePartNum[0]; + } + u8 memProfNum = meminfo_hob->MemoryProfile; serial_num = src_dimm->SpdSave + SPD_SAVE_OFFSET_SERIAL; -- cgit v1.2.3