cpu/amd (non-AGESA): Fix AP crash during microcode version lookup

Move mapping tables to struct and prevent OOB array
access that was crashing the APs during CAR initialization.

Change-Id: I9e2554b50ad60a8d02ef4bd3fbee6fddb238d83f
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/8310
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@gmail.com>
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

1 files changed, 35 insertions, 26 deletions

diff --git a/src/cpu/amd/model_fxx/model_fxx_update_microcode.c b/src/cpu/amd/model_fxx/model_fxx_update_microcode.c
index 4a53feaa29..af10ce0670 100644
--- a/src/cpu/amd/model_fxx/model_fxx_update_microcode.c
+++ b/src/cpu/amd/model_fxx/model_fxx_update_microcode.c
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2005 Advanced Micro Devices, Inc.
  * Copyright (C) 2010 Advanced Micro Devices, Inc.
+ * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -40,35 +41,43 @@ static uint8_t microcode_updates[] __attribute__ ((aligned(16))) = {
         0x0, 0x0, 0x0, 0x0,
 };
 
-static unsigned get_equivalent_processor_rev_id(unsigned orig_id) {
-	static unsigned id_mapping_table[] = {
+struct id_mapping {
+        uint32_t orig_id;
+        uint16_t new_id;
+};
+
+static u16 get_equivalent_processor_rev_id(u32 orig_id) {
+	static const struct id_mapping id_mapping_table[] = {
 	#if !CONFIG_K8_REV_F_SUPPORT
-	        0x0f48, 0x0048,
-	        0x0f58, 0x0048,
-
-	        0x0f4a, 0x004a,
-	        0x0f5a, 0x004a,
-	        0x0f7a, 0x004a,
-	        0x0f82, 0x004a,
-	        0x0fc0, 0x004a,
-	        0x0ff0, 0x004a,
-
-	        0x10f50, 0x0150,
-	        0x10f70, 0x0150,
-	        0x10f80, 0x0150,
-	        0x10fc0, 0x0150,
-	        0x10ff0, 0x0150,
-
-	        0x20f10, 0x0210,
-	        0x20f12, 0x0210,
-	        0x20f32, 0x0210,
-	        0x20fb1, 0x0210,
+	        { 0x0f48, 0x0048 },
+	        { 0x0f58, 0x0048 },
+
+	        { 0x0f4a, 0x004a },
+	        { 0x0f5a, 0x004a },
+	        { 0x0f7a, 0x004a },
+	        { 0x0f82, 0x004a },
+	        { 0x0fc0, 0x004a },
+	        { 0x0ff0, 0x004a },
+
+	        { 0x10f50, 0x0150 },
+	        { 0x10f70, 0x0150 },
+	        { 0x10f80, 0x0150 },
+	        { 0x10fc0, 0x0150 },
+	        { 0x10ff0, 0x0150 },
+
+	        { 0x20f10, 0x0210 },
+	        { 0x20f12, 0x0210 },
+	        { 0x20f32, 0x0210 },
+	        { 0x20fb1, 0x0210 },
 	#endif
 
 	#if CONFIG_K8_REV_F_SUPPORT
-
+		/* FIXME */
 	#endif
 
+		/* Array terminator */
+		{ 0xffffff, 0x0000 },
+
 	};
 
 	unsigned new_id;
@@ -76,9 +85,9 @@ static unsigned get_equivalent_processor_rev_id(unsigned orig_id) {
 
 	new_id = 0;
 
-	for(i=0; i<sizeof(id_mapping_table); i+=2 ) {
-		if(id_mapping_table[i]==orig_id) {
-			new_id = id_mapping_table[i+1];
+	for (i = 0; id_mapping_table[i].orig_id != 0xffffff; i++ ) {
+		if (id_mapping_table[i].orig_id == orig_id) {
+			new_id = id_mapping_table[i].new_id;
 			break;
 		}
 	}