[mirror_edk2.git] / OldMdePkg / Library / BaseLib / X64 / EnablePaging64.S

#------------------------------------------------------------------------------
#
# 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.S
#
# Abstract:
#
#   AsmEnablePaging64 function
#
# Notes:
#
#------------------------------------------------------------------------------


#------------------------------------------------------------------------------
# VOID
# EFIAPI
# InternalX86EnablePaging64 (
#   IN      UINT16                    Cs,			%rdi
#   IN      UINT64                    EntryPoint,		%rsi
#   IN      UINT64                    Context1,  OPTIONAL	%rdx
#   IN      UINT64                    Context2,  OPTIONAL	%rcx
#   IN      UINT64                    NewStack			%r8
#   );
#------------------------------------------------------------------------------
.global _InternalX86EnablePaging64;
_InternalX86EnablePaging64:
    cli    
    pop    %rax
    callq  Base
Base:
    addl   $(L1-Base),(%rsp)
    mov    %cr4,%rax
    or     $0x20,%al
    mov    %rax,%cr4
    mov    $0xc0000080,%ecx
    rdmsr  
    or     $0x1,%ah
    wrmsr  
    mov    %cr0,%rax
    bts    $0x1f,%eax
    mov    %rax,%cr0
    lret   
L1:
    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    .
Commit	Line	Data
e29e52e7	1	#------------------------------------------------------------------------------
	2	#
	3	# Copyright (c) 2006, Intel Corporation
	4	# All rights reserved. This program and the accompanying materials
	5	# are licensed and made available under the terms and conditions of the BSD License
	6	# which accompanies this distribution. The full text of the license may be found at
	7	# http://opensource.org/licenses/bsd-license.php
	8	#
	9	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	10	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
	11	#
	12	# Module Name:
	13	#
	14	# EnablePaging64.S
	15	#
	16	# Abstract:
	17	#
	18	# AsmEnablePaging64 function
	19	#
	20	# Notes:
	21	#
	22	#------------------------------------------------------------------------------
	23
	24
	25	#------------------------------------------------------------------------------
	26	# VOID
	27	# EFIAPI
	28	# InternalX86EnablePaging64 (
	29	# IN UINT16 Cs, %rdi
	30	# IN UINT64 EntryPoint, %rsi
	31	# IN UINT64 Context1, OPTIONAL %rdx
	32	# IN UINT64 Context2, OPTIONAL %rcx
	33	# IN UINT64 NewStack %r8
	34	# );
	35	#------------------------------------------------------------------------------
	36	.global _InternalX86EnablePaging64;
	37	_InternalX86EnablePaging64:
	38	cli
	39	pop %rax
	40	callq Base
	41	Base:
	42	addl $(L1-Base),(%rsp)
	43	mov %cr4,%rax
	44	or $0x20,%al
	45	mov %rax,%cr4
	46	mov $0xc0000080,%ecx
	47	rdmsr
	48	or $0x1,%ah
	49	wrmsr
	50	mov %cr0,%rax
	51	bts $0x1f,%eax
	52	mov %rax,%cr0
	53	lret
	54	L1:
	55	addr32 mov (%esp),%rbx
	56	addr32 mov 0x8(%esp),%rcx
	57	addr32 mov 0x10(%esp),%rdx
	58	addr32 mov 0x18(%esp),%rsp
	59	add $-0x20,%rsp
	60	callq *%rbx
	61	jmp .