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-rw-r--r--arch/i386/boot/memory.c118
1 files changed, 0 insertions, 118 deletions
diff --git a/arch/i386/boot/memory.c b/arch/i386/boot/memory.c
deleted file mode 100644
index 3783539..0000000
--- a/arch/i386/boot/memory.c
+++ /dev/null
@@ -1,118 +0,0 @@
-/* -*- linux-c -*- ------------------------------------------------------- *
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright 2007 rPath, Inc. - All Rights Reserved
- *
- * This file is part of the Linux kernel, and is made available under
- * the terms of the GNU General Public License version 2.
- *
- * ----------------------------------------------------------------------- */
-
-/*
- * arch/i386/boot/memory.c
- *
- * Memory detection code
- */
-
-#include "boot.h"
-
-#define SMAP 0x534d4150 /* ASCII "SMAP" */
-
-static int detect_memory_e820(void)
-{
- int count = 0;
- u32 next = 0;
- u32 size, id;
- u8 err;
- struct e820entry *desc = boot_params.e820_map;
-
- do {
- size = sizeof(struct e820entry);
-
- /* Important: %edx is clobbered by some BIOSes,
- so it must be either used for the error output
- or explicitly marked clobbered. */
- asm("int $0x15; setc %0"
- : "=d" (err), "+b" (next), "=a" (id), "+c" (size),
- "=m" (*desc)
- : "D" (desc), "d" (SMAP), "a" (0xe820));
-
- /* Some BIOSes stop returning SMAP in the middle of
- the search loop. We don't know exactly how the BIOS
- screwed up the map at that point, we might have a
- partial map, the full map, or complete garbage, so
- just return failure. */
- if (id != SMAP) {
- count = 0;
- break;
- }
-
- if (err)
- break;
-
- count++;
- desc++;
- } while (next && count < E820MAX);
-
- return boot_params.e820_entries = count;
-}
-
-static int detect_memory_e801(void)
-{
- u16 ax, bx, cx, dx;
- u8 err;
-
- bx = cx = dx = 0;
- ax = 0xe801;
- asm("stc; int $0x15; setc %0"
- : "=m" (err), "+a" (ax), "+b" (bx), "+c" (cx), "+d" (dx));
-
- if (err)
- return -1;
-
- /* Do we really need to do this? */
- if (cx || dx) {
- ax = cx;
- bx = dx;
- }
-
- if (ax > 15*1024)
- return -1; /* Bogus! */
-
- /* This ignores memory above 16MB if we have a memory hole
- there. If someone actually finds a machine with a memory
- hole at 16MB and no support for 0E820h they should probably
- generate a fake e820 map. */
- boot_params.alt_mem_k = (ax == 15*1024) ? (dx << 6)+ax : ax;
-
- return 0;
-}
-
-static int detect_memory_88(void)
-{
- u16 ax;
- u8 err;
-
- ax = 0x8800;
- asm("stc; int $0x15; setc %0" : "=bcdm" (err), "+a" (ax));
-
- boot_params.screen_info.ext_mem_k = ax;
-
- return -err;
-}
-
-int detect_memory(void)
-{
- int err = -1;
-
- if (detect_memory_e820() > 0)
- err = 0;
-
- if (!detect_memory_e801())
- err = 0;
-
- if (!detect_memory_88())
- err = 0;
-
- return err;
-}
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