You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.4 KiB
64 lines
2.4 KiB
#------------------------------------------------------------------------------
|
|
#
|
|
# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
|
|
# 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.S
|
|
#
|
|
# Abstract:
|
|
#
|
|
# InternalX86EnablePaging64 function
|
|
#
|
|
# Notes:
|
|
#
|
|
#------------------------------------------------------------------------------
|
|
|
|
ASM_GLOBAL ASM_PFX(InternalX86EnablePaging64)
|
|
|
|
#------------------------------------------------------------------------------
|
|
# VOID
|
|
# EFIAPI
|
|
# InternalX86EnablePaging64 (
|
|
# IN UINT16 CodeSelector,
|
|
# IN UINT64 EntryPoint,
|
|
# IN UINT64 Context1, OPTIONAL
|
|
# IN UINT64 Context2, OPTIONAL
|
|
# IN UINT64 NewStack
|
|
# );
|
|
#------------------------------------------------------------------------------
|
|
ASM_PFX(InternalX86EnablePaging64):
|
|
cli
|
|
movl $LongStart, (%esp) # offset for far retf, seg is the 1st arg
|
|
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 # set PG
|
|
movl %eax, %cr0 # enable paging
|
|
lret # topmost 2 dwords hold the address
|
|
LongStart: # long mode starts here
|
|
.byte 0x67, 0x48 # 32-bit address size, 64-bit operand size
|
|
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 $-0x20, %esp # add rsp, -20h
|
|
call *%ebx # call rbx
|
|
jmp . # no one should get here
|