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authorHuang, Ying <ying.huang@intel.com>2008-06-02 06:26:23 (GMT)
committerThomas Gleixner <tglx@linutronix.de>2008-06-05 13:10:02 (GMT)
commit0c51a965ed3c44dd50497e74492a015680e49899 (patch)
treec04c9670b5adecfef995cd1dc49b8c5d9e5e5ed3 /arch/x86/kernel/head32.c
parentecacf09f7d26b2317e8b1d59fa40f62081fad0bb (diff)
x86: extract common part of head32.c and head64.c into head.c
This patch extracts the common part of head32.c and head64.c into head.c. Signed-off-by: Huang Ying <ying.huang@intel.com> Cc: andi@firstfloor.org Cc: mingo@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/head32.c')
-rw-r--r--arch/x86/kernel/head32.c50
1 files changed, 0 insertions, 50 deletions
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c
index 0b6cb9f..fa1d25d 100644
--- a/arch/x86/kernel/head32.c
+++ b/arch/x86/kernel/head32.c
@@ -13,56 +13,6 @@
#include <asm/e820.h>
#include <asm/bios_ebda.h>
-#define BIOS_LOWMEM_KILOBYTES 0x413
-
-/*
- * The BIOS places the EBDA/XBDA at the top of conventional
- * memory, and usually decreases the reported amount of
- * conventional memory (int 0x12) too. This also contains a
- * workaround for Dell systems that neglect to reserve EBDA.
- * The same workaround also avoids a problem with the AMD768MPX
- * chipset: reserve a page before VGA to prevent PCI prefetch
- * into it (errata #56). Usually the page is reserved anyways,
- * unless you have no PS/2 mouse plugged in.
- */
-static void __init reserve_ebda_region(void)
-{
- unsigned int lowmem, ebda_addr;
-
- /* To determine the position of the EBDA and the */
- /* end of conventional memory, we need to look at */
- /* the BIOS data area. In a paravirtual environment */
- /* that area is absent. We'll just have to assume */
- /* that the paravirt case can handle memory setup */
- /* correctly, without our help. */
- if (paravirt_enabled())
- return;
-
- /* end of low (conventional) memory */
- lowmem = *(unsigned short *)__va(BIOS_LOWMEM_KILOBYTES);
- lowmem <<= 10;
-
- /* start of EBDA area */
- ebda_addr = get_bios_ebda();
-
- /* Fixup: bios puts an EBDA in the top 64K segment */
- /* of conventional memory, but does not adjust lowmem. */
- if ((lowmem - ebda_addr) <= 0x10000)
- lowmem = ebda_addr;
-
- /* Fixup: bios does not report an EBDA at all. */
- /* Some old Dells seem to need 4k anyhow (bugzilla 2990) */
- if ((ebda_addr == 0) && (lowmem >= 0x9f000))
- lowmem = 0x9f000;
-
- /* Paranoia: should never happen, but... */
- if ((lowmem == 0) || (lowmem >= 0x100000))
- lowmem = 0x9f000;
-
- /* reserve all memory between lowmem and the 1MB mark */
- reserve_early(lowmem, 0x100000, "BIOS reserved");
-}
-
void __init i386_start_kernel(void)
{
reserve_early(__pa_symbol(&_text), __pa_symbol(&_end), "TEXT DATA BSS");

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