[coreboot-gerrit] Change in coreboot[master]: mb/google/hatch: Preserve MRC training data across FW update

[Shelley Chen (Code Review)]

Shelley Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/35803 )

Change subject: mb/google/hatch: Preserve MRC training data across FW update
......................................................................

mb/google/hatch: Preserve MRC training data across FW update

Enable RW_RESERVE so that we retain the memory training data upon a FW
update.

BUG=b:142084637
BRANCH=None
TEST=flash RW_SECTION_A, RW_SECTION_B, and WP_RO sections and make
     sure memory training doesn't occur on following bootup.

Change-Id: Ia5eb228b1f665a8371982544723dab3dfc40d401
Signed-off-by: Shelley Chen 
---
M src/mainboard/google/hatch/chromeos.fmd
1 file changed, 5 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/03/35803/1

diff --git a/src/mainboard/google/hatch/chromeos.fmd b/src/mainboard/google/hatch/chromeos.fmd
index 393ac80..07c739c 100644
--- a/src/mainboard/google/hatch/chromeos.fmd
+++ b/src/mainboard/google/hatch/chromeos.fmd
@@ -19,9 +19,11 @@
    		RW_FWID_B@0x3dffc0 0x40
    	}
    	RW_MISC@0x17c0000 0x40000 {
-			UNIFIED_MRC_CACHE@0x0 0x30000 {
-				RECOVERY_MRC_CACHE@0x0 0x10000
-				RW_MRC_CACHE@0x10000 0x20000
+			RW_PRESERVE(PRESERVE) {
+				UNIFIED_MRC_CACHE@0x0 0x30000 {
+					RECOVERY_MRC_CACHE@0x0 0x10000
+					RW_MRC_CACHE@0x10000 0x20000
+				}
    		}
    		RW_ELOG(PRESERVE)@0x30000 0x4000
    		RW_SHARED@0x34000 0x4000 {