[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EdkIIGlueLib / Library / BaseLib / X64 / DisablePaging64.S

#------------------------------------------------------------------------------\r
#\r
# Copyright (c) 2006, Intel Corporation\r
# All rights reserved. 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
#\r
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
#\r
# Module Name:\r
#\r
#   DisablePaging64.S\r
#\r
# Abstract:\r
#\r
#   AsmDisablePaging64 function\r
#\r
# Notes:\r
#\r
#------------------------------------------------------------------------------\r
\r
    \r
#include <EdkIIGlueBase.h>\r
#------------------------------------------------------------------------------\r
# VOID\r
# EFIAPI\r
# InternalX86DisablePaging64 (\r
#   IN      UINT16                    Cs,			%rdi\r
#   IN      UINT64                    EntryPoint,		%rsi\r
#   IN      UINT64                    Context1,  OPTIONAL	%rdx\r
#   IN      UINT32                    Context2,  OPTIONAL	%rcx\r
#   IN      UINT64                    NewStack			%r8\r
#   );\r
#------------------------------------------------------------------------------\r
\r
.global ASM_PFX(InternalX86DisablePaging64)\r
ASM_PFX(InternalX86DisablePaging64):\r
    cli    \r
    shl    $0x20,%rcx\r
    lea    (%rip), %eax\r
    mov    %eax,%ecx\r
    push   %rcx\r
    mov    %edx,%ebx\r
    mov    %r8d,%esi\r
    mov    %r9d,%edi\r
    mov    0x28(%rsp),%eax\r
    lret   \r
L1:\r
    mov    %eax,%esp\r
    mov    %cr0,%rax\r
    btr    $0x1f,%eax\r
    mov    %rax,%cr0\r
    mov    $0xc0000080,%ecx\r
    rdmsr  \r
    and    $0xfe,%ah\r
    wrmsr  \r
    mov    %cr4,%rax\r
    and    $0xdf,%al\r
    mov    %rax,%cr4\r
    push   %rdi\r
    push   %rsi\r
    callq  *%rbx\r
    jmp    .\r
\r
Commit	Line	Data
b341712e	1	#------------------------------------------------------------------------------\r
	2	#\r
	3	# Copyright (c) 2006, Intel Corporation\r
	4	# All rights reserved. This program and the accompanying materials\r
	5	# are licensed and made available under the terms and conditions of the BSD License\r
	6	# which accompanies this distribution. The full text of the license may be found at\r
	7	# http://opensource.org/licenses/bsd-license.php\r
	8	#\r
	9	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	10	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	11	#\r
	12	# Module Name:\r
	13	#\r
	14	# DisablePaging64.S\r
	15	#\r
	16	# Abstract:\r
	17	#\r
	18	# AsmDisablePaging64 function\r
	19	#\r
	20	# Notes:\r
	21	#\r
	22	#------------------------------------------------------------------------------\r
	23	\r
	24	\r
	25	#include <EdkIIGlueBase.h>\r
	26	#------------------------------------------------------------------------------\r
	27	# VOID\r
	28	# EFIAPI\r
	29	# InternalX86DisablePaging64 (\r
	30	# IN UINT16 Cs, %rdi\r
	31	# IN UINT64 EntryPoint, %rsi\r
	32	# IN UINT64 Context1, OPTIONAL %rdx\r
	33	# IN UINT32 Context2, OPTIONAL %rcx\r
	34	# IN UINT64 NewStack %r8\r
	35	# );\r
	36	#------------------------------------------------------------------------------\r
	37	\r
	38	.global ASM_PFX(InternalX86DisablePaging64)\r
	39	ASM_PFX(InternalX86DisablePaging64):\r
	40	cli \r
	41	shl $0x20,%rcx\r
	42	lea (%rip), %eax\r
	43	mov %eax,%ecx\r
	44	push %rcx\r
	45	mov %edx,%ebx\r
	46	mov %r8d,%esi\r
	47	mov %r9d,%edi\r
	48	mov 0x28(%rsp),%eax\r
	49	lret \r
	50	L1:\r
	51	mov %eax,%esp\r
	52	mov %cr0,%rax\r
	53	btr $0x1f,%eax\r
	54	mov %rax,%cr0\r
	55	mov $0xc0000080,%ecx\r
	56	rdmsr \r
	57	and $0xfe,%ah\r
	58	wrmsr \r
	59	mov %cr4,%rax\r
	60	and $0xdf,%al\r
	61	mov %rax,%cr4\r
	62	push %rdi\r
	63	push %rsi\r
	64	callq *%rbx\r
65	jmp .\r
66	\r