From 67e6c2aaf4d4194dac824014197cc684af9750f5 Mon Sep 17 00:00:00 2001
From: Duncan Laurie <dlaurie@chromium.org>
Date: Wed, 18 Jan 2012 10:05:18 -0800
Subject: Don't re-init EBDA in S3 resume path.

I forgot to implement this the first time around.

It does not seem to cause noticeable problems but
in heavy suspend/resume testing I saw a suspicious
crash in the kernel when trying to bring one of the
CPUs back online.

Change-Id: I950ac260f251e2683693d9bd20a0dd5e041aa26e
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: http://review.coreboot.org/770
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
---
 src/arch/x86/lib/ebda.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/arch')

diff --git a/src/arch/x86/lib/ebda.c b/src/arch/x86/lib/ebda.c
index faf1451a2f..fb407b6ac8 100644
--- a/src/arch/x86/lib/ebda.c
+++ b/src/arch/x86/lib/ebda.c
@@ -23,9 +23,18 @@
 #include <string.h>
 #include <arch/io.h>
 #include <arch/ebda.h>
+#if CONFIG_HAVE_ACPI_RESUME
+#include <arch/acpi.h>
+#endif
 
 void setup_ebda(u32 low_memory_size, u16 ebda_segment, u16 ebda_size)
 {
+#if CONFIG_HAVE_ACPI_RESUME
+	/* Skip in S3 resume path */
+	if (acpi_slp_type == 3)
+		return;
+#endif
+
 	if (!low_memory_size || !ebda_segment || !ebda_size)
 		return;
 
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