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-rw-r--r--src/soc/intel/common/mrc_cache.c38
-rw-r--r--src/soc/intel/common/mrc_cache.h6
2 files changed, 32 insertions, 12 deletions
diff --git a/src/soc/intel/common/mrc_cache.c b/src/soc/intel/common/mrc_cache.c
index 92c92ca781..1f59875fb5 100644
--- a/src/soc/intel/common/mrc_cache.c
+++ b/src/soc/intel/common/mrc_cache.c
@@ -93,9 +93,6 @@ static int mrc_cache_valid(const struct mrc_data_region *region,
if (cache->size > region->size)
return 0;
- if (cache->reserved != 0)
- return 0;
-
checksum = compute_ip_checksum((void *)&cache->data[0], cache->size);
if (cache->checksum != checksum)
@@ -116,7 +113,8 @@ next_cache_block(const struct mrc_saved_data *cache)
/* Locate the most recently saved MRC data. */
static int __mrc_cache_get_current(const struct mrc_data_region *region,
- const struct mrc_saved_data **cache)
+ const struct mrc_saved_data **cache,
+ uint32_t version)
{
const struct mrc_saved_data *msd;
const struct mrc_saved_data *verified_cache;
@@ -136,35 +134,47 @@ static int __mrc_cache_get_current(const struct mrc_data_region *region,
if (verified_cache == NULL)
return -1;
+ if (verified_cache->version != version) {
+ printk(BIOS_DEBUG, "MRC cache version mismatch: %x vs %x\n",
+ verified_cache->version, version);
+ return -1;
+ }
+
*cache = verified_cache;
printk(BIOS_DEBUG, "MRC cache slot %d @ %p\n", slot-1, verified_cache);
return 0;
}
-int mrc_cache_get_current(const struct mrc_saved_data **cache)
+int mrc_cache_get_current_with_version(const struct mrc_saved_data **cache,
+ uint32_t version)
{
struct mrc_data_region region;
if (mrc_cache_get_region(&region) < 0)
return -1;
- return __mrc_cache_get_current(&region, cache);
+ return __mrc_cache_get_current(&region, cache, version);
}
+int mrc_cache_get_current(const struct mrc_saved_data **cache)
+{
+ return mrc_cache_get_current_with_version(cache, 0);
+}
/* Fill in mrc_saved_data structure with payload. */
static void mrc_cache_fill(struct mrc_saved_data *cache, void *data,
- size_t size)
+ size_t size, uint32_t version)
{
cache->signature = MRC_DATA_SIGNATURE;
cache->size = size;
- cache->reserved = 0;
+ cache->version = version;
memcpy(&cache->data[0], data, size);
cache->checksum = compute_ip_checksum((void *)&cache->data[0],
cache->size);
}
-int mrc_cache_stash_data(void *data, size_t size)
+int mrc_cache_stash_data_with_version(void *data, size_t size,
+ uint32_t version)
{
int cbmem_size;
struct mrc_saved_data *cache;
@@ -184,11 +194,16 @@ int mrc_cache_stash_data(void *data, size_t size)
printk(BIOS_DEBUG, "Relocate MRC DATA from %p to %p (%zu bytes)\n",
data, cache, size);
- mrc_cache_fill(cache, data, size);
+ mrc_cache_fill(cache, data, size, version);
return 0;
}
+int mrc_cache_stash_data(void *data, size_t size)
+{
+ return mrc_cache_stash_data_with_version(data, size, 0);
+}
+
static int mrc_slot_valid(const struct mrc_data_region *region,
const struct mrc_saved_data *slot,
const struct mrc_saved_data *to_save)
@@ -281,7 +296,8 @@ static void update_mrc_cache(void *unused)
current_saved = NULL;
- if (!__mrc_cache_get_current(&region, &current_saved)) {
+ if (!__mrc_cache_get_current(&region, &current_saved,
+ current_boot->version)) {
if (current_saved->size == current_boot->size &&
!memcmp(&current_saved->data[0], &current_boot->data[0],
current_saved->size)) {
diff --git a/src/soc/intel/common/mrc_cache.h b/src/soc/intel/common/mrc_cache.h
index 9af3ef10c5..25d9316aec 100644
--- a/src/soc/intel/common/mrc_cache.h
+++ b/src/soc/intel/common/mrc_cache.h
@@ -24,14 +24,18 @@ struct mrc_saved_data {
uint32_t signature;
uint32_t size;
uint32_t checksum;
- uint32_t reserved;
+ uint32_t version;
uint8_t data[0];
} __attribute__((packed));
/* Locate the most recently saved MRC data. */
int mrc_cache_get_current(const struct mrc_saved_data **cache);
+int mrc_cache_get_current_with_version(const struct mrc_saved_data **cache,
+ uint32_t version);
/* Stash the resulting MRC data to be saved in non-volatile storage later. */
int mrc_cache_stash_data(void *data, size_t size);
+int mrc_cache_stash_data_with_version(void *data, size_t size,
+ uint32_t version);
#endif /* _COMMON_MRC_CACHE_H_ */