drivers/intel/fsp2_0: add option to compress FSP-S in cbfs

Allow the ability for chipset or mainboard to choose to
compress FSP-S in cbfs using LZMA or LZ4 routines. To accomplish
this fsp_load_component() is added as an assist for performing
the necessary logic and allow the caller to provide the destination
selection. Since the main cbfs decompression paths are utilized add
the appropriate checks for including compression algorithms under
the FSP-S compression options.

On picasso FSP-S (debug builds) the following savings were measured:

no-compression:
	fsps.bin	327680	none
FSP_COMPRESS_FSP_S_LZ4:
	fsps.bin	98339	LZ4 (327680 decompressed)	-70%
FSP_COMPRESS_FSP_S_LZMA:
	fsps.bin	71275 	LZMA (327680 decompressed)	-78%

BUG=b:155322763,b:150746858,b:152909132

Change-Id: I8aa5d8c1cbaf4d08f38a918a9031a2570bc5247e
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41449
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/drivers/intel/fsp2_0/include/fsp/util.h b/src/drivers/intel/fsp2_0/include/fsp/util.h
index ed2a2ae81d..f531e36bee 100644
--- a/src/drivers/intel/fsp2_0/include/fsp/util.h
+++ b/src/drivers/intel/fsp2_0/include/fsp/util.h
@@ -9,6 +9,7 @@
 #include <fsp/api.h>
 #include <fsp/info_header.h>
 #include <memrange.h>
+#include <program_loading.h>
 #include <types.h>
 
 struct hob_header {
@@ -79,6 +80,21 @@ void fsp_find_bootloader_tolum(struct range_entry *re);
 enum cb_err fsp_validate_component(struct fsp_header *hdr,
 					const struct region_device *rdev);
 
+struct fsp_load_descriptor {
+	/* fsp_prog object will have region_device initialized to final
+	 * load location in memory. */
+	struct prog fsp_prog;
+	/* Fill in destination location given final load size. Return 0 on
+	 * success, < 0 on error. */
+	int (*get_destination)(const struct fsp_load_descriptor *fspld,
+			void **dest, size_t final_load_size,
+			const struct region_device *source);
+};
+
+/* Load the FSP component described by fsp_load_descriptor from cbfs. The FSP
+ * header object will be validated and filled in on successful load. */
+enum cb_err fsp_load_component(struct fsp_load_descriptor *fspld, struct fsp_header *hdr);
+
 /* Get igd framebuffer bar from SoC */
 uintptr_t fsp_soc_get_igd_bar(void);