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

[Furquan Shaikh (Code Review)]

Furquan Shaikh has uploaded this change for review. ( https://review.coreboot.org/29183

Change subject: mb/google/octopus: Preserve MRC training data across firmware update
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mb/google/octopus: Preserve MRC training data across firmware update

This change udpates FMAP to wrap MRC training data in RW_PRESERVE
section so that we don't lose the data when performing full firmware
updates on octopus.

BUG=b:117882029
TEST=Verified that chromeos-firmwareupdate doing full firmware update
preserves training data on octopus.

Change-Id: I5adb9bfa926327057b003360150685a8b4778c8c
Signed-off-by: Furquan Shaikh 
---
M src/mainboard/google/octopus/chromeos.fmd
1 file changed, 6 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/83/29183/1

diff --git a/src/mainboard/google/octopus/chromeos.fmd b/src/mainboard/google/octopus/chromeos.fmd
index f601adc..6088f0d 100644
--- a/src/mainboard/google/octopus/chromeos.fmd
+++ b/src/mainboard/google/octopus/chromeos.fmd
@@ -12,10 +12,12 @@
    	}
    }
    MISC_RW@0x400000 0x30000 {
-		UNIFIED_MRC_CACHE@0x0 0x21000 {
-			RECOVERY_MRC_CACHE@0x0 0x10000
-			RW_MRC_CACHE@0x10000 0x10000
-			RW_VAR_MRC_CACHE@0x20000 0x1000
+		RW_PRESERVE {
+			UNIFIED_MRC_CACHE@0x0 0x21000 {
+				RECOVERY_MRC_CACHE@0x0 0x10000
+				RW_MRC_CACHE@0x10000 0x10000
+				RW_VAR_MRC_CACHE@0x20000 0x1000
+			}
    	}
    	RW_ELOG@0x21000 0x3000
    	RW_SHARED@0x24000 0x4000 {