#------------------------------------------------------------------------------\r
#*\r
-#* Copyright 2006 - 2007, Intel Corporation \r
-#* All rights reserved. This program and the accompanying materials \r
+#* Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r
+#* This program and the accompanying materials \r
#* are licensed and made available under the terms and conditions of the BSD License \r
#* which accompanies this distribution. The full text of the license may be found at \r
#* http://opensource.org/licenses/bsd-license.php \r
#.MODEL small\r
.stack: \r
.486p: \r
- .code: \r
+ .code16 \r
\r
.equ FAT_DIRECTORY_ENTRY_SIZE, 0x0020\r
.equ FAT_DIRECTORY_ENTRY_SHIFT, 5\r
.equ BLOCK_MASK, 0x01ff\r
.equ BLOCK_SHIFT, 9\r
\r
- .org 0x00
-.global _start
+ .org 0x00\r
+\r
+.global _start\r
_start:\r
+\r
Ia32Jump: \r
jmp BootSectorEntryPoint # JMP inst - 3 bytes\r
nop\r
\r
\r
A20GateEnabled: \r
-\r
+ movw $0x0008, %bx # Flat data descriptor\r
#\r
# DISABLE INTERRUPTS - Entering Protected Mode\r
#\r
movl %cr0, %eax\r
orb $1, %al\r
movl %eax, %cr0\r
-\r
- movl $0x008, %eax # Flat data descriptor\r
- movl $0x00400000, %ebp # Destination of EFILDR32\r
- movl $0x00070000, %ebx # Length of copy\r
-\r
JUMP: \r
# jmp far 0010:00020000\r
.byte 0x66\r
# data\r
##############################################################################\r
\r
- .align 0x2\r
+ .p2align 1\r
\r
gdtr: .word GDT_END - GDT_BASE - 1 # GDT limit\r
.long 0 # (GDT base gets set above)\r
# global descriptor table (GDT)\r
##############################################################################\r
\r
- .align 0x2\r
+ .p2align 1\r
\r
-.global GDT_BASE\r
GDT_BASE: \r
# null descriptor\r
.equ NULL_SEL, .-GDT_BASE\r
\r
GDT_END: \r
\r
- .align 0x2\r
+ .p2align 1\r
\r
\r
\r
##############################################################################\r
\r
#idt_tag db "IDT",0 \r
- .align 0x2\r
+ .p2align 1\r
\r
-.global IDT_BASE\r
IDT_BASE: \r
# divide by zero (INT 0)\r
.equ DIV_ZERO_SEL, .-IDT_BASE\r
\r
IDT_END: \r
\r
- .align 0x2\r
+ .p2align 1\r
\r
MemoryMapSize: .long 0\r
MemoryMap: .long 0,0,0,0,0,0,0,0\r