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x86, realmode: Move reboot_32.S to unified realmode code

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Migrated reboot_32.S from x86_trampoline to the real-mode
blob.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-5-git-send-email-jarkko.sakkinen@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Jarkko Sakkinen
2012-05-08 21:22:27 +03:00
committed by H. Peter Anvin
parent 084ee1c641
commit 5a8c9aebe0
6 changed files with 52 additions and 65 deletions
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25
arch/x86/kernel/reboot.c
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@@ -24,6 +24,7 @@
#ifdef CONFIG_X86_32
# include <linux/ctype.h>
# include <linux/mc146818rtc.h>
# include <asm/realmode.h>
#else
# include <asm/x86_init.h>
#endif
@@ -332,15 +333,10 @@ static int __init reboot_init(void)
}
core_initcall(reboot_init);
extern const unsigned char machine_real_restart_asm[];
extern const u64 machine_real_restart_gdt[3];
void machine_real_restart(unsigned int type)
{
void *restart_va;
unsigned long restart_pa;
void (*restart_lowmem)(unsigned int);
u64 *lowmem_gdt;
void (*restart_lowmem)(unsigned int) = (void (*)(unsigned int))
real_mode_header.machine_real_restart_asm;
local_irq_disable();
@@ -369,21 +365,6 @@ void machine_real_restart(unsigned int type)
too. */
*((unsigned short *)0x472) = reboot_mode;
/* Patch the GDT in the low memory trampoline */
lowmem_gdt = TRAMPOLINE_SYM(machine_real_restart_gdt);
restart_va = TRAMPOLINE_SYM(machine_real_restart_asm);
restart_pa = virt_to_phys(restart_va);
restart_lowmem = (void (*)(unsigned int))restart_pa;
/* GDT[0]: GDT self-pointer */
lowmem_gdt[0] =
(u64)(sizeof(machine_real_restart_gdt) - 1) +
((u64)virt_to_phys(lowmem_gdt) << 16);
/* GDT[1]: 64K real mode code segment */
lowmem_gdt[1] =
GDT_ENTRY(0x009b, restart_pa, 0xffff);
/* Jump to the identity-mapped low memory code */
restart_lowmem(type);
}