{mb, soc}: Move mrc_cache invalidating logic into memory common code

Commit hash b8b40964 ( mb, soc: Add the SPD_CACHE_ENABLE) introduced
per mainboard logic to invalidate the mrc_cache.

This patch moves mrc_cache invalidating logic into IA common code and
cleans up the code to remove unused argument `dimms_changed` from SoC
and mainboard directory.

BUG=b:200243989
BRANCH=firmware-brya-14505.B
TEST=Able to build and boot redrix without any visible failure/errors.

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I6f18e18adc6572571871dd6da1698186e4e3d671
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62738
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Zhuohao Lee <zhuohao@google.com>

src/mainboard/google/brya/romstage.c

@@ -12,7 +12,6 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 	const struct mb_cfg *mem_config = variant_memory_params();
 	bool half_populated = variant_is_half_populated();
 	struct mem_spd spd_info;
-	bool dimms_changed = false;
 
 	memset(&spd_info, 0, sizeof(spd_info));
 	variant_get_spd_info(&spd_info);
@@ -20,11 +19,7 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 	const struct pad_config *pads;
 	size_t pads_num;
 
-	memcfg_init(memupd, mem_config, &spd_info, half_populated, &dimms_changed);
-	if (dimms_changed) {
-		memupd->FspmArchUpd.NvsBufferPtr = 0;
-		memupd->FspmArchUpd.BootMode = FSP_BOOT_WITH_FULL_CONFIGURATION;
-	}
+	memcfg_init(memupd, mem_config, &spd_info, half_populated);
 
 	pads = variant_romstage_gpio_table(&pads_num);
 	gpio_configure_pads(pads, pads_num);

src/mainboard/intel/adlrvp/romstage_fsp_params.c

@@ -48,7 +48,6 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 	const struct mb_cfg *mem_config = variant_memory_params();
 	int board_id = get_board_id();
 	const bool half_populated = false;
-	bool dimms_changed = false;
 
 	const struct mem_spd memory_down_spd_info = {
 		.topo = MEM_TOPO_MEMORY_DOWN,
@@ -73,8 +72,7 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 	case ADL_P_DDR4_1:
 	case ADL_P_DDR4_2:
 	case ADL_P_DDR5_1:
-		memcfg_init(memupd, mem_config, &dimm_module_spd_info, half_populated,
-				&dimms_changed);
+		memcfg_init(memupd, mem_config, &dimm_module_spd_info, half_populated);
 		break;
 	case ADL_P_DDR5_2:
 	case ADL_P_LP4_1:
@@ -84,8 +82,7 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 	case ADL_M_LP4:
 	case ADL_M_LP5:
 	case ADL_N_LP5:
-		memcfg_init(memupd, mem_config, &memory_down_spd_info, half_populated,
-				&dimms_changed);
+		memcfg_init(memupd, mem_config, &memory_down_spd_info, half_populated);
 		break;
 	default:
 		die("Unknown board id = 0x%x\n", board_id);

src/mainboard/intel/shadowmountain/romstage.c

@@ -11,12 +11,11 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 {
 	const struct mb_cfg *mem_config = variant_memory_params();
 	const bool half_populated = false;
-	bool dimms_changed = false;
 
 	const struct mem_spd lp5_spd_info = {
 		.topo = MEM_TOPO_MEMORY_DOWN,
 		.cbfs_index = variant_memory_sku(),
 	};
 
-	memcfg_init(memupd, mem_config, &lp5_spd_info, half_populated, &dimms_changed);
+	memcfg_init(memupd, mem_config, &lp5_spd_info, half_populated);
 }

src/mainboard/prodrive/atlas/romstage_fsp_params.c

@@ -31,7 +31,6 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 {
 	const struct mb_cfg *mem_config = &ddr5_mem_config;
 	const bool half_populated = false;
-	bool dimms_changed = false;
 
 	const struct mem_spd dimm_module_spd_info = {
 		.topo = MEM_TOPO_DIMM_MODULE,
@@ -47,5 +46,5 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 		},
 	};
 
-	memcfg_init(memupd, mem_config, &dimm_module_spd_info, half_populated, &dimms_changed);
+	memcfg_init(memupd, mem_config, &dimm_module_spd_info, half_populated);
 }

src/soc/intel/alderlake/include/soc/meminit.h

@@ -110,6 +110,6 @@ struct mb_cfg {
 };
 
 void memcfg_init(FSPM_UPD *memupd, const struct mb_cfg *mb_cfg,
-		 const struct mem_spd *spd_info, bool half_populated, bool *dimms_changed);
+		 const struct mem_spd *spd_info, bool half_populated);
 
 #endif /* _SOC_ALDERLAKE_MEMINIT_H_ */

src/soc/intel/alderlake/meminit.c

@@ -236,7 +236,7 @@ static void ddr5_fill_dimm_module_info(FSP_M_CONFIG *mem_cfg, const struct mb_cf
 }
 
 void memcfg_init(FSPM_UPD *memupd, const struct mb_cfg *mb_cfg,
-		 const struct mem_spd *spd_info, bool half_populated, bool *dimms_changed)
+		 const struct mem_spd *spd_info, bool half_populated)
 {
 	struct mem_channel_data data;
 	bool dq_dqs_auto_detect = false;
@@ -280,7 +280,7 @@ void memcfg_init(FSPM_UPD *memupd, const struct mb_cfg *mb_cfg,
 	}
 
 	mem_populate_channel_data(memupd, &soc_mem_cfg[mb_cfg->type], spd_info, half_populated,
-			&data, dimms_changed);
+			&data);
 	mem_init_spd_upds(mem_cfg, &data);
 	mem_init_dq_upds(mem_cfg, &data, mb_cfg, dq_dqs_auto_detect);
 	mem_init_dqs_upds(mem_cfg, &data, mb_cfg, dq_dqs_auto_detect);

src/soc/intel/common/block/include/intelblocks/meminit.h

@@ -136,13 +136,11 @@ struct mem_channel_data {
  *                 the mainboard.
  * spd_info      : Information about the memory topology.
  * half_populated: Hint from mainboard if channels are half populated.
- * dimms_changed: True if the dimms is changed after caching the spd data.
  */
 void mem_populate_channel_data(FSPM_UPD *memupd, const struct soc_mem_cfg *soc_mem_cfg,
 				const struct mem_spd *spd_info,
 				bool half_populated,
-				struct mem_channel_data *data,
-				bool *dimms_changed);
+				struct mem_channel_data *data);
 
 /*
  * Given a channel number and the maximum number of supported channels, this

src/soc/intel/common/block/memory/meminit.c

@@ -98,7 +98,7 @@ static void read_spd_md(const struct soc_mem_cfg *soc_mem_cfg, const struct mem_
 static bool read_spd_dimm(FSPM_UPD *memupd, const struct soc_mem_cfg *soc_mem_cfg,
 			const struct mem_spd *info, bool half_populated,
 			struct mem_channel_data *channel_data,
-			size_t *spd_len, bool *dimms_changed)
+			size_t *spd_len)
 {
 	size_t ch, dimm;
 	struct spd_block blk = { 0 };
@@ -110,7 +110,6 @@ static bool read_spd_dimm(FSPM_UPD *memupd, const struct soc_mem_cfg *soc_mem_cf
 	 * channel is marked as populated.
 	 */
 	uint32_t pop_mask = 0;
-	*dimms_changed = false;
 
 	if (!(info->topo & MEM_TOPO_DIMM_MODULE))
 		return false;
@@ -134,14 +133,15 @@ static bool read_spd_dimm(FSPM_UPD *memupd, const struct soc_mem_cfg *soc_mem_cf
 				printk(BIOS_WARNING, "Invalid SPD cache\n");
 			} else {
 				dimm_changed = check_if_dimm_changed(spd_cache, &blk);
-				if (dimm_changed) {
+				if (dimm_changed && memupd->FspmArchUpd.NvsBufferPtr != 0) {
 					/*
-					 * Set flag to indicate that the
+					 * Set FSP-M Arch UPD to indicate that the
 					 * mrc_cache need to be invalidated
 					 */
-					printk(BIOS_INFO,
-					"DIMM change, invalidate cache.\n");
-					*dimms_changed = true;
+					printk(BIOS_INFO, "DIMM change, invalidate cache.\n");
+					memupd->FspmArchUpd.NvsBufferPtr = 0;
+					memupd->FspmArchUpd.BootMode =
+						 FSP_BOOT_WITH_FULL_CONFIGURATION;
 				}
 			}
 			need_update_cache = true;
@@ -187,8 +187,7 @@ static bool read_spd_dimm(FSPM_UPD *memupd, const struct soc_mem_cfg *soc_mem_cf
 void mem_populate_channel_data(FSPM_UPD *memupd, const struct soc_mem_cfg *soc_mem_cfg,
 				const struct mem_spd *spd_info,
 				bool half_populated,
-				struct mem_channel_data *data,
-				bool *dimms_changed)
+				struct mem_channel_data *data)
 {
 	size_t spd_md_len = 0, spd_dimm_len = 0;
 	bool have_dimms;
@@ -197,7 +196,7 @@ void mem_populate_channel_data(FSPM_UPD *memupd, const struct soc_mem_cfg *soc_m
 
 	read_spd_md(soc_mem_cfg, spd_info, half_populated, data, &spd_md_len);
 	have_dimms = read_spd_dimm(memupd, soc_mem_cfg, spd_info, half_populated, data,
-				&spd_dimm_len, dimms_changed);
+				&spd_dimm_len);
 
 	if (data->ch_population_flags == NO_CHANNEL_POPULATED)
 		die("No channels are populated. Incorrect memory configuration!\n");

src/soc/intel/tigerlake/meminit.c

@@ -151,14 +151,13 @@ void memcfg_init(FSPM_UPD *memupd, const struct mb_cfg *mb_cfg,
 		 const struct mem_spd *spd_info, bool half_populated)
 {
 	struct mem_channel_data data;
-	bool dimms_changed = false;
 	FSP_M_CONFIG *mem_cfg = &memupd->FspmConfig;
 
 	if (mb_cfg->type >= ARRAY_SIZE(soc_mem_cfg))
 		die("Invalid memory type(%x)!\n", mb_cfg->type);
 
 	mem_populate_channel_data(memupd, &soc_mem_cfg[mb_cfg->type], spd_info, half_populated,
-			&data, &dimms_changed);
+			&data);
 	mem_init_spd_upds(mem_cfg, &data);
 	mem_init_dq_upds(mem_cfg, &data, mb_cfg);
 	mem_init_dqs_upds(mem_cfg, &data, mb_cfg);