From c3ee57114315320b542f53645ffb168ad654b756 Mon Sep 17 00:00:00 2001
From: Duncan Laurie <dlaurie@chromium.org>
Date: Tue, 15 Jul 2014 13:40:21 -0700
Subject: [PATCH] samus: Disable self refresh and MRC cache on broadwell

Workarounds for power and/or lpddr3 issues on broadwell SKU.

BUG=chrome-os-partner:29787,chrome-os-partner:29117
BRANCH=None
TEST=build and boot on samus

Change-Id: If99346212c10ad6026250e48bedd916611e2cb8c
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/208154
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
---
 src/mainboard/google/samus/romstage.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/mainboard/google/samus/romstage.c b/src/mainboard/google/samus/romstage.c
index d6528592e4..2e1a71f5c5 100644
--- a/src/mainboard/google/samus/romstage.c
+++ b/src/mainboard/google/samus/romstage.c
@@ -22,6 +22,7 @@
 #include <console/console.h>
 #include <string.h>
 #include <ec/google/chromeec/ec.h>
+#include <broadwell/cpu.h>
 #include <broadwell/gpio.h>
 #include <broadwell/pei_data.h>
 #include <broadwell/pei_wrapper.h>
@@ -54,6 +55,16 @@ void mainboard_romstage_entry(struct romstage_params *rp)
 	mainboard_fill_spd_data(&pei_data);
 	rp->pei_data = &pei_data;
 
+	/*
+	 * http://crosbug.com/p/29117
+	 * Disable use of PEI saved data to work around memory issues.
+	 */
+	if (cpu_family_model() == BROADWELL_FAMILY_ULT) {
+		pei_data.disable_self_refresh = 1;
+		pei_data.disable_saved_data = 1;
+	}
+
+	/* Initliaze memory */
 	romstage_common(rp);
 
 	/*