fast Linux boot support

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@614 c046a42c-6fe2-441c-8c8c-71466251a162
2004-02-16 21:55:09 +00:00 · 2004-02-16 21:55:09 +00:00 · 07ce05eaa9
parent b324e814a9
commit 07ce05eaa9
1 changed files with 32 additions and 0 deletions
--- a/linux_boot.S
+++ b/linux_boot.S
@ -0,0 +1,32 @@
+/*
+ * 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: