{commonlib/drivers}: Have option to store MRC version inside CBMEM
This patch introduces CBMEM ID to store the MRC version (similar to
existing implementation that stores the FSP-M version inside CBMEM ID)
inside cbmem so the version information is available across the
different coreboot stages. For example:
* romstage: Use the CBMEM ID version information to check if the MRC
cache is valid and need to erase the MRC cache
* ramstage: Use the CBMEM ID to store the MRC cache into the
non-volatile space.
BUG=b:261689642
TEST=Able to build and boot google/rex and dump the MRC version as
below.
cbmem --list
CBMEM table of contents:
NAME ID START LENGTH
...
21. MRC VERSION 5f43524d 75ffeb60 00000004
...
localhost ~ # cbmem -r 5f43524d | hexdump
00000000 01 12 07 00
Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I91f735239b33c6f8ba41c076048903e4b213c6a2
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75921
Reviewed-by: Ronak Kanabar <ronak.kanabar@intel.com>
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/drivers/intel/fsp2_0/memory_init.c b/src/drivers/intel/fsp2_0/memory_init.c
index fa24a7e..28e4d72 100644
--- a/src/drivers/intel/fsp2_0/memory_init.c
+++ b/src/drivers/intel/fsp2_0/memory_init.c
@@ -30,10 +30,28 @@
static uint8_t temp_ram[CONFIG_FSP_TEMP_RAM_SIZE] __aligned(sizeof(uint64_t));
+/*
+ * Helper function to store the MRC cache version into CBMEM
+ *
+ * ramstage uses either the MRC version or FSP-M version (depending on the config)
+ * when updating the MRC cache
+ */
+static void do_cbmem_version_entry(uint32_t cbmem_id, uint32_t version)
+{
+ uint32_t *cbmem_version_entry = cbmem_add(cbmem_id, sizeof(version));
+ if (!cbmem_version_entry) {
+ printk(BIOS_ERR, "Failed to add %s version to cbmem.\n",
+ CONFIG(MRC_CACHE_USING_MRC_VERSION) ? "MRC" : "FSP-M");
+ return;
+ }
+ *cbmem_version_entry = version;
+}
+
static void do_fsp_post_memory_init(bool s3wake, uint32_t version)
{
struct range_entry fsp_mem;
- uint32_t *fsp_version_cbmem;
+ uint32_t cbmem_id = CONFIG(MRC_CACHE_USING_MRC_VERSION) ? CBMEM_ID_MRC_VERSION :
+ CBMEM_ID_FSPM_VERSION;
fsp_find_reserved_memory(&fsp_mem);
@@ -56,14 +74,8 @@
(uintptr_t)cbmem_find(CBMEM_ID_FSP_RESERVED_MEMORY))
die("Failed to accommodate FSP reserved memory request!\n");
- /* ramstage uses the FSP-M version when updating the MRC cache */
- if (CONFIG(CACHE_MRC_SETTINGS) && !s3wake) {
- fsp_version_cbmem = cbmem_add(CBMEM_ID_FSPM_VERSION,
- sizeof(version));
- if (!fsp_version_cbmem)
- printk(BIOS_ERR, "Failed to add FSP-M version to cbmem.\n");
- *fsp_version_cbmem = version;
- }
+ if (CONFIG(CACHE_MRC_SETTINGS) && !s3wake)
+ do_cbmem_version_entry(cbmem_id, version);
/* Create romstage handof information */
romstage_handoff_init(s3wake);