#------------------------------------------------------------------------------ | |
# | |
# Copyright (c) 2006, Intel Corporation | |
# All rights reserved. This program and the accompanying materials | |
# are licensed and made available under the terms and conditions of the BSD License | |
# which accompanies this distribution. The full text of the license may be found at | |
# http://opensource.org/licenses/bsd-license.php | |
# | |
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
# | |
# Module Name: | |
# | |
# EnablePaging64.Asm | |
# | |
# Abstract: | |
# | |
# AsmEnablePaging64 function | |
# | |
# Notes: | |
# | |
#------------------------------------------------------------------------------ | |
#.MODEL flat | |
#------------------------------------------------------------------------------ | |
# VOID | |
# EFIAPI | |
# AsmEnablePaging64 ( | |
# IN UINT16 CodeSelector, | |
# IN UINT64 EntryPoint, | |
# IN UINT64 Context1, OPTIONAL | |
# IN UINT64 Context2, OPTIONAL | |
# IN UINT64 NewStack | |
# ); | |
#------------------------------------------------------------------------------ | |
.global _AsmEnablePaging64 | |
_AsmEnablePaging64: | |
cli | |
movl $$LongStart, (%esp) | |
movl %cr4, %eax | |
orb $0x20, %al | |
movl %eax, %cr4 # enable PAE | |
movl $0xc0000080, %ecx | |
rdmsr | |
orb $1, %ah # set LME | |
wrmsr | |
movl %cr0, %eax | |
btsl $31, %eax | |
movl %eax, %cr0 # enable paging | |
lret | |
LongStart: # long mode starts here | |
.byte 0x67,0x48 | |
movl (%esp), %ebx # mov rbx, [esp] | |
.byte 0x67,0x48 | |
movl 8(%esp), %ecx # mov rcx, [esp + 8] | |
.byte 0x67,0x48 | |
movl 0x10(%esp), %edx # mov rdx, [esp + 10h] | |
.byte 0x67,0x48 | |
movl 0x18(%esp), %esp # mov rsp, [esp + 18h] | |
.byte 0x48 | |
addl $0x-20, %esp # add rsp, -20h | |
call *%ebx # call rbx | |
jmp . |