mb/google/poppy: Allow use of optional secondary SPD

This change adds support for variants to use secondary SPD if
required. This enables a variant to have different types of memory
supported using the same image.

BUG=b:73514687

Change-Id: I3add65ead99c510f2d6ec899fbf2cb9a06c79b0c
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/24972
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/poppy/romstage.c

@@ -110,19 +110,20 @@ static void mainboard_print_spd_info(const uint8_t *spd, enum memory_type type)
 	}
 }
 
-static uintptr_t mainboard_get_spd_data(enum memory_type type)
+static uintptr_t mainboard_get_spd_data(enum memory_type type, bool use_sec_spd)
 {
 	char *spd_file;
 	size_t spd_file_len;
 	int spd_index;
 	const size_t spd_len = spd_info[type].len;
+	const char *spd_bin = use_sec_spd ? "sec-spd.bin" : "spd.bin";
 
 	spd_index = variant_memory_sku();
 	assert(spd_index >= 0);
 	printk(BIOS_INFO, "SPD index %d\n", spd_index);
 
 	/* Load SPD data from CBFS */
-	spd_file = cbfs_boot_map_with_leak("spd.bin", CBFS_TYPE_SPD,
+	spd_file = cbfs_boot_map_with_leak(spd_bin, CBFS_TYPE_SPD,
 					   &spd_file_len);
 	if (!spd_file)
 		die("SPD data not found.");
@@ -160,7 +161,7 @@ void mainboard_memory_init_params(FSPM_UPD *mupd)
 		p.rcomp_resistor_size);
 	memcpy(&mem_cfg->RcompTarget, p.rcomp_target, p.rcomp_target_size);
 
-	mem_cfg->MemorySpdPtr00 = mainboard_get_spd_data(p.type);
+	mem_cfg->MemorySpdPtr00 = mainboard_get_spd_data(p.type, p.use_sec_spd);
 	mem_cfg->MemorySpdPtr10 = mem_cfg->MemorySpdPtr00;
 	mem_cfg->MemorySpdDataLen = spd_info[p.type].len;
 }

src/mainboard/google/poppy/spd/Makefile.inc

@@ -1,5 +1,19 @@
 
 SPD_BIN = $(obj)/spd.bin
+SEC_SPD_BIN = $(obj)/sec-spd.bin
+
+define gen_spd_bin
+	for f in $2; \
+	  do for c in $$(cat $$f | grep -v ^#); \
+	    do printf $$(printf '\%o' 0x$$c); \
+	  done; \
+	done > $1
+endef
+
+add_spd_to_cbfs= \
+	$(eval cbfs-files-y += $1) \
+	$(eval $1-file := $2) \
+	$(eval $1-type := spd)
 
 ifeq ($(SPD_SOURCES),)
 	SPD_DEPS := $(error SPD_SOURCES is not set. Variant must provide this)
@@ -7,14 +21,20 @@ else
 	SPD_DEPS := $(foreach f, $(SPD_SOURCES), src/mainboard/$(MAINBOARDDIR)/spd/$(f).spd.hex)
 endif
 
-# Include spd ROM data
+# Include SPD ROM data
 $(SPD_BIN): $(SPD_DEPS)
-	for f in $+; \
+	$(call gen_spd_bin, $@, $+)
-	  do for c in $$(cat $$f | grep -v ^#); \
-	    do printf $$(printf '\%o' 0x$$c); \
-	  done; \
-	done > $@
 
-cbfs-files-y += spd.bin
+$(call add_spd_to_cbfs, spd.bin, $(SPD_BIN))
-spd.bin-file := $(SPD_BIN)
+
-spd.bin-type := spd
+# Add optional secondary SPD ROM data if present
+ifneq ($(SEC_SPD_SOURCES),)
+
+SEC_SPD_DEPS := $(foreach f, $(SEC_SPD_SOURCES), src/mainboard/$(MAINBOARDDIR)/spd/$(f).spd.hex)
+
+$(SEC_SPD_BIN): $(SEC_SPD_DEPS)
+		$(call gen_spd_bin, $@, $+)
+
+$(call add_spd_to_cbfs, sec-spd.bin, $(SEC_SPD_BIN))
+
+endif

src/mainboard/google/poppy/variants/baseboard/include/baseboard/variants.h

@@ -45,6 +45,7 @@ struct memory_params {
 	size_t rcomp_resistor_size;
 	const void *rcomp_target;
 	size_t rcomp_target_size;
+	bool use_sec_spd;
 };
 
 void variant_memory_params(struct memory_params *p);