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From acb022efd422f1008e311863779cfb2395069bd6 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineeringinc.com>
Date: Tue, 24 Nov 2015 14:12:03 -0600
Subject: [PATCH 37/45] mainboard/asus/kgpe-d16: Wait for all APs to stop
before MCT setup
Under certain conditions when the APs are still executing during
MCT setup the system can hang. This was the root cause of most
of the S3 resume failures on this platform; waiting for AP stop
before MCT setup allows for reliable S3 resume.
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
---
src/mainboard/asus/kgpe-d16/romstage.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/mainboard/asus/kgpe-d16/romstage.c b/src/mainboard/asus/kgpe-d16/romstage.c
index 6fb7668..5df6de4 100644
--- a/src/mainboard/asus/kgpe-d16/romstage.c
+++ b/src/mainboard/asus/kgpe-d16/romstage.c
@@ -515,6 +515,10 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
post_code(0x3B);
+ /* Wait for all APs to be stopped, otherwise ram initialization may hang */
+ if (IS_ENABLED(CONFIG_LOGICAL_CPUS))
+ wait_all_other_cores_stopped(bsp_apicid);
+
/* It's the time to set ctrl in sysinfo now; */
printk(BIOS_DEBUG, "fill_mem_ctrl() detected %d nodes\n", sysinfo->nodes);
if (is_fam15h())
--
2.1.4
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