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fast Linux boot support 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@614 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-02-16 21:55:09 +00:00
parent b324e814a9
commit 07ce05eaa9
1 changed files with 32 additions and 0 deletions
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linux_boot.S Normal file
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/*
* QEMU Boot sector to launch a preloaded Linux kernel
* Copyright (c) 2004 Fabrice Bellard
*/
#define LOAD_SEG 0x9000
.code16
.text
.globl linux_boot_start
.globl linux_boot_end
linux_boot_start:
cli
cld
mov $LOAD_SEG, %ax
mov %ax, %ds
mov %ax, %es
mov %ax, %fs
mov %ax, %gs
mov %ax, %ss
mov $0x8ffe, %sp
ljmp $LOAD_SEG + 0x20, $0
1:
.fill 510 - (1b - linux_boot_start), 1, 0
/* boot sector signature */
.byte 0x55
.byte 0xaa
linux_boot_end: