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[bios] Update to use the generic system memory map API

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Provide an implementation of the system memory map API based on the
assorted BIOS INT 15 calls, and a temporary implementation of the
legacy get_memmap() function using the new API.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-05-15 01:21:48 +01:00
parent 3f6ee95737
commit 4c4c94ca09
7 changed files with 157 additions and 64 deletions
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25
src/core/memmap.c
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@@ -24,6 +24,7 @@
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <assert.h>
#include <ipxe/io.h>
#include <ipxe/memmap.h>
/** @file
@@ -110,5 +111,29 @@ void memmap_update_used ( struct memmap_region *region ) {
}
}
/**
* Get legacy system memory map
*
* @v memmap Legacy memory map to fill in
*/
void get_memmap ( struct memory_map *memmap ) {
struct memmap_region region;
struct memory_region *usable;
/* Clear legacy memory map */
memmap->count = 0;
/* Populate legacy memory map */
for_each_memmap ( &region, 1 ) {
if ( memmap_is_usable ( &region ) ) {
usable = &memmap->regions[memmap->count++];
usable->start = region.addr;
usable->end = ( region.last + 1 );
if ( memmap->count == MAX_MEMORY_REGIONS )
break;
}
}
}
PROVIDE_MEMMAP_INLINE ( null, memmap_describe );
PROVIDE_MEMMAP_INLINE ( null, memmap_sync );