mirror of https://github.com/acidanthera/audk.git
62 lines
2.1 KiB
ArmAsm
62 lines
2.1 KiB
ArmAsm
#------------------------------------------------------------------------------
|
|
#
|
|
# Copyright (c) 2006 - 2008, 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.S
|
|
#
|
|
# Abstract:
|
|
#
|
|
# AsmEnablePaging64 function
|
|
#
|
|
# Notes:
|
|
#
|
|
#------------------------------------------------------------------------------
|
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
# VOID
|
|
# EFIAPI
|
|
# InternalX86EnablePaging64 (
|
|
# IN UINT16 Cs,
|
|
# IN UINT64 EntryPoint,
|
|
# IN UINT64 Context1, OPTIONAL
|
|
# IN UINT64 Context2, OPTIONAL
|
|
# IN UINT64 NewStack
|
|
# );
|
|
#------------------------------------------------------------------------------
|
|
.global ASM_PFX(InternalX86EnablePaging64)
|
|
ASM_PFX(InternalX86EnablePaging64):
|
|
cli
|
|
pop %rax # skip the return address
|
|
callq Base
|
|
Base:
|
|
addl $(L1-Base),(%rsp) # offset for ret, seg is the 1st arg
|
|
mov %cr4,%rax
|
|
or $0x20,%al
|
|
mov %rax,%cr4 # enable PAE
|
|
mov $0xc0000080,%ecx
|
|
rdmsr
|
|
or $0x1,%ah # set LME
|
|
wrmsr
|
|
mov %cr0,%rax
|
|
bts $0x1f,%eax
|
|
mov %rax,%cr0 # enable paging
|
|
lret
|
|
L1: # long mode starts here
|
|
addr32 mov (%esp),%rbx
|
|
addr32 mov 0x8(%esp),%rcx
|
|
addr32 mov 0x10(%esp),%rdx
|
|
addr32 mov 0x18(%esp),%rsp
|
|
add $-0x20,%rsp
|
|
callq *%rbx
|
|
jmp . # dead loop if EntryPoint() returned
|