static int prepare_mrc_cache(struct pei_data *pei_data)
{
struct mrc_data_container *mrc_cache;
struct fmap_entry entry;
int ret;
ret = read_seed_from_cmos(pei_data);
if (ret)
return ret;
ret = get_mrc_entry(NULL, &entry);
if (ret)
return ret;
mrc_cache = mrccache_find_current(&entry);
if (!mrc_cache)
return -ENOENT;
/*
* TODO([email protected]): Skip this for now as it causes boot
* problems
*/
if (0) {
pei_data->mrc_input = mrc_cache->data;
pei_data->mrc_input_len = mrc_cache->data_size;
}
debug("%s: at %p, size %x checksum %04x\n", __func__,
pei_data->mrc_input, pei_data->mrc_input_len,
mrc_cache->checksum);
return 0;
}
int mrccache_update(struct udevice *sf, struct mrc_region *entry,
struct mrc_data_container *cur)
{
struct mrc_data_container *cache;
ulong offset;
ulong base_addr;
int ret;
if (!is_mrc_cache(cur))
return -EINVAL;
/* Find the last used block */
base_addr = entry->base + entry->offset;
debug("Updating MRC cache data\n");
cache = mrccache_find_current(entry);
if (cache && (cache->data_size == cur->data_size) &&
(!memcmp(cache, cur, cache->data_size + sizeof(*cur)))) {
debug("MRC data in flash is up to date. No update\n");
return -EEXIST;
}
/* Move to the next block, which will be the first unused block */
if (cache)
cache = find_next_mrc_cache(entry, cache);
/*
* If we have got to the end, erase the entire mrc-cache area and start
* again at block 0.
*/
if (!cache) {
debug("Erasing the MRC cache region of %x bytes at %x\n",
entry->length, entry->offset);
ret = spi_flash_erase_dm(sf, entry->offset, entry->length);
if (ret) {
debug("Failed to erase flash region\n");
return ret;
}
cache = (struct mrc_data_container *)base_addr;
}
/* Write the data out */
offset = (ulong)cache - base_addr + entry->offset;
debug("Write MRC cache update to flash at %lx\n", offset);
ret = spi_flash_write_dm(sf, offset, cur->data_size + sizeof(*cur),
cur);
if (ret) {
debug("Failed to write to SPI flash\n");
return ret;
}
return 0;
}
static __maybe_unused void *fsp_prepare_mrc_cache(void)
{
struct mrc_data_container *cache;
struct mrc_region entry;
int ret;
ret = mrccache_get_region(NULL, &entry);
if (ret)
return NULL;
cache = mrccache_find_current(&entry);
if (!cache)
return NULL;
debug("%s: mrc cache at %p, size %x checksum %04x\n", __func__,
cache->data, cache->data_size, cache->checksum);
return cache->data;
}
static int prepare_mrc_cache(struct pei_data *pei_data)
{
struct mrc_data_container *mrc_cache;
struct mrc_region entry;
int ret;
ret = mrccache_get_region(NULL, &entry);
if (ret)
return ret;
mrc_cache = mrccache_find_current(&entry);
if (!mrc_cache)
return -ENOENT;
pei_data->saved_data = mrc_cache->data;
pei_data->saved_data_size = mrc_cache->data_size;
debug("%s: at %p, size %x checksum %04x\n", __func__,
pei_data->saved_data, pei_data->saved_data_size,
mrc_cache->checksum);
return 0;
}
