Change in coreboot[master]: selfboot: Provide __weak cache_payload_destination

[Kane Chen (Code Review)]

Kane Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/64428 )

Change subject: selfboot: Provide __weak cache_payload_destination
......................................................................

selfboot: Provide __weak cache_payload_destination

This commit provides a __weak function for mainboards, SoCs...etc
to implement function to speed up LZMA decompression.

BUG=b:225766934

Change-Id: Ia0d7d15faacadd520226d88a705a1e517c0ae908
Signed-off-by: Kane Chen 
---
M src/include/program_loading.h
M src/lib/selfboot.c
2 files changed, 9 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/64428/1

diff --git a/src/include/program_loading.h b/src/include/program_loading.h
index 7ff55fc..a9d83e3 100644
--- a/src/include/program_loading.h
+++ b/src/include/program_loading.h
@@ -159,6 +159,7 @@
  ***********************/

int payload_arch_usable_ram_quirk(uint64_t start, uint64_t size);
+void cache_payload_destination(void *dest, size_t memsz);

/*
  * Asynchronously preloads the payload.
diff --git a/src/lib/selfboot.c b/src/lib/selfboot.c
index 637ad13..a9b4cca 100644
--- a/src/lib/selfboot.c
+++ b/src/lib/selfboot.c
@@ -53,6 +53,11 @@
    return 0;
 }

+__weak void cache_payload_destination(void *dest, size_t memsz)
+{
+	return;
+}
+
 static int load_one_segment(uint8_t *dest,
    		    uint8_t *src,
    		    size_t len,
@@ -67,6 +72,9 @@
    /* Compute the boundaries of the segment */
    end = dest + memsz;

+	/* cache the mem address where payload is loaded if possible */
+	cache_payload_destination(dest, memsz);
+
    /* Copy data from the initial buffer */
    switch (compression) {
    case CBFS_COMPRESS_LZMA: {