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drivers/intel/fsp2_0: Avoid unnecessary extra CBFS access

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fsp_mrc_version() function does not need to perform a CBFS access to
to get an address to the FSP-M blob as the caller,
do_fsp_memory_init(), already has it loaded. In addition to make the
code simpler, it avoids an unnecessary decompression of the FSP blob
if `FSP_COMPRESS_FSP_M_LZ4' or `FSP_COMPRESS_FSP_M_LZMA' are set.

TEST=Verified on Meteor Lake rex

Change-Id: If355b5811a09a0b76acc8a297db719d54caedc54
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81256
Reviewed-by: Shuo Liu <shuo.liu@intel.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Bora Guvendik <bora.guvendik@intel.com>
This commit is contained in:
Jeremy Compostella
2024-03-12 17:57:13 -07:00
committed by Jérémy Compostella
parent 969f04fb34
commit 44adf4d22f
1 changed files with 3 additions and 9 deletions
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12
src/drivers/intel/fsp2_0/memory_init.c
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@@ -259,23 +259,17 @@ struct fspm_context {
* MRC version is by reading the FSP_PRODUCDER_DATA_TABLES
* from the FSP-M binary (by parsing the FSP header).
*/
static uint32_t fsp_mrc_version(void)
static uint32_t fsp_mrc_version(const struct fsp_header *hdr)
{
uint32_t ver = 0;
#if CONFIG(MRC_CACHE_USING_MRC_VERSION)
size_t fspm_blob_size;
const char *fspm_cbfs = soc_select_fsp_m_cbfs();
void *fspm_blob_file = cbfs_map(fspm_cbfs, &fspm_blob_size);
if (!fspm_blob_file)
return 0;
void *fspm_blob_file = (void *)(uintptr_t)hdr->image_base;
FSP_PRODUCER_DATA_TABLES *ft = fspm_blob_file + FSP_HDR_OFFSET;
FSP_PRODUCER_DATA_TYPE2 *table2 = &ft->FspProduceDataType2;
size_t mrc_version_size = sizeof(table2->MrcVersion);
for (size_t i = 0; i < mrc_version_size; i++) {
ver |= (table2->MrcVersion[i] << ((mrc_version_size - 1) - i) * 8);
}
cbfs_unmap(fspm_blob_file);
#endif
return ver;
}
@@ -349,7 +343,7 @@ static void do_fsp_memory_init(const struct fspm_context *context, bool s3wake)
post_code(POSTCODE_MEM_PREINIT_PREP_START);
if (CONFIG(MRC_CACHE_USING_MRC_VERSION))
version = fsp_mrc_version();
version = fsp_mrc_version(hdr);
else
version = fsp_memory_settings_version(hdr);