From 6a342cb699d3573e366053076df5808c738de7e6 Mon Sep 17 00:00:00 2001
From: Duncan Laurie <dlaurie@chromium.org>
Date: Tue, 15 Jul 2014 13:40:21 -0700
Subject: samus: Disable self refresh and MRC cache on broadwell

Add 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

Original-Change-Id: If99346212c10ad6026250e48bedd916611e2cb8c
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/208154
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit c3ee57114315320b542f53645ffb168ad654b756)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Ie28f3ad65000a627ba64486e0f16493e8101cef3
Reviewed-on: http://review.coreboot.org/8214
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
---
 src/mainboard/google/samus/romstage.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/mainboard')

diff --git a/src/mainboard/google/samus/romstage.c b/src/mainboard/google/samus/romstage.c
index d6528592e4..c0c7200102 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 +55,15 @@ void mainboard_romstage_entry(struct romstage_params *rp)
 	mainboard_fill_spd_data(&pei_data);
 	rp->pei_data = &pei_data;
 
+	/*
+	 * 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;
+	}
+
+	/* Initalize memory */
 	romstage_common(rp);
 
 	/*
-- 
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