From e4f8d6eed72c38a99d94b11015c0ef63024b296d Mon Sep 17 00:00:00 2001
From: Michael Brown <mcb30@etherboot.org>
Date: Thu, 25 May 2006 00:00:30 +0000
Subject: [PATCH] Add a "count" field to struct memory_map.

---
 src/arch/i386/firmware/pcbios/memmap.c | 14 ++++++++------
 src/arch/i386/include/memmap.h         |  3 +++
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/arch/i386/firmware/pcbios/memmap.c b/src/arch/i386/firmware/pcbios/memmap.c
index 0a9373a7d..daa1d99cc 100644
--- a/src/arch/i386/firmware/pcbios/memmap.c
+++ b/src/arch/i386/firmware/pcbios/memmap.c
@@ -138,7 +138,7 @@ static unsigned int extmemsize ( void ) {
  * @ret rc		Return status code
  */
 static int meme820 ( struct memory_map *memmap ) {
-	unsigned int index = 0;
+	struct memory_region *region = memmap->regions;
 	uint32_t next = 0;
 	uint32_t smap;
 	unsigned int flags;
@@ -169,12 +169,13 @@ static int meme820 ( struct memory_map *memmap ) {
 		if ( e820buf.type != E820_TYPE_RAM )
 			continue;
 
-		memmap->regions[index].start = e820buf.start;
-		memmap->regions[index].end = e820buf.start + e820buf.len;
-		index++;
+		region->start = e820buf.start;
+		region->end = e820buf.start + e820buf.len;
+		region++;
+		memmap->count++;
 	} while ( ( next != 0 ) && 
-		  ( index < ( sizeof ( memmap->regions ) /
-			      sizeof ( memmap->regions[0] ) ) ) );
+		  ( memmap->count < ( sizeof ( memmap->regions ) /
+				      sizeof ( memmap->regions[0] ) ) ) );
 	return 0;
 }
 
@@ -202,4 +203,5 @@ void get_memmap ( struct memory_map *memmap ) {
 	memmap->regions[0].end = ( basemem * 1024 );
 	memmap->regions[1].start = 0x100000;
 	memmap->regions[1].end = 0x100000 + ( extmem * 1024 );
+	memmap->count = 2;
 }
diff --git a/src/arch/i386/include/memmap.h b/src/arch/i386/include/memmap.h
index e514784de..ccba14b68 100644
--- a/src/arch/i386/include/memmap.h
+++ b/src/arch/i386/include/memmap.h
@@ -23,7 +23,10 @@ struct memory_region {
 
 /** A memory map */
 struct memory_map {
+	/** Memory regions */
 	struct memory_region regions[MAX_MEMORY_REGIONS];
+	/** Number of used regions */
+	unsigned int count;
 };
 
 extern void get_memmap ( struct memory_map *memmap );