[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EdkIIGlueLib / Library / BaseLib / Ia32 / EnablePaging32.asm

; Copyright (c) 2004, 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
;   EnablePaging32.Asm\r
;\r
; Abstract:\r
;\r
;   AsmEnablePaging32 function\r
;\r
; Notes:\r
;\r
;------------------------------------------------------------------------------\r
\r
    .386\r
    .model  flat,C\r
    .code\r
\r
;------------------------------------------------------------------------------\r
; VOID\r
; EFIAPI\r
; InternalX86EnablePaging32 (\r
;   IN      SWITCH_STACK_ENTRY_POINT  EntryPoint,\r
;   IN      VOID                      *Context1,    OPTIONAL\r
;   IN      VOID                      *Context2,    OPTIONAL\r
;   IN      VOID                      *NewStack\r
;   );\r
;------------------------------------------------------------------------------\r
InternalX86EnablePaging32 PROC\r
    mov     ebx, [esp + 4]\r
    mov     ecx, [esp + 8]\r
    mov     edx, [esp + 12]\r
    pushfd\r
    pop     edi                         ; save flags in edi\r
    cli\r
    mov     eax, cr0\r
    bts     eax, 31\r
    mov     esp, [esp + 16]\r
    mov     cr0, eax\r
    push    edi\r
    popfd                               ; restore flags\r
    push    edx\r
    push    ecx\r
    call    ebx\r
    jmp     $\r
InternalX86EnablePaging32 ENDP\r
\r
    END\r
Commit	Line	Data
3eb9473e	1	; Copyright (c) 2004, Intel Corporation \r
	2	; All rights reserved. This program and the accompanying materials \r
	3	; are licensed and made available under the terms and conditions of the BSD License \r
	4	; which accompanies this distribution. The full text of the license may be found at \r
	5	; http://opensource.org/licenses/bsd-license.php \r
	6	; \r
	7	; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
	8	; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
	9	;\r
	10	; Module Name:\r
	11	;\r
	12	; EnablePaging32.Asm\r
	13	;\r
	14	; Abstract:\r
	15	;\r
	16	; AsmEnablePaging32 function\r
	17	;\r
	18	; Notes:\r
	19	;\r
	20	;------------------------------------------------------------------------------\r
	21	\r
	22	.386\r
	23	.model flat,C\r
	24	.code\r
	25	\r
	26	;------------------------------------------------------------------------------\r
	27	; VOID\r
	28	; EFIAPI\r
	29	; InternalX86EnablePaging32 (\r
	30	; IN SWITCH_STACK_ENTRY_POINT EntryPoint,\r
	31	; IN VOID *Context1, OPTIONAL\r
	32	; IN VOID *Context2, OPTIONAL\r
	33	; IN VOID *NewStack\r
	34	; );\r
	35	;------------------------------------------------------------------------------\r
	36	InternalX86EnablePaging32 PROC\r
	37	mov ebx, [esp + 4]\r
	38	mov ecx, [esp + 8]\r
	39	mov edx, [esp + 12]\r
	40	pushfd\r
	41	pop edi ; save flags in edi\r
	42	cli\r
	43	mov eax, cr0\r
	44	bts eax, 31\r
	45	mov esp, [esp + 16]\r
	46	mov cr0, eax\r
	47	push edi\r
	48	popfd ; restore flags\r
	49	push edx\r
	50	push ecx\r
	51	call ebx\r
	52	jmp $\r
	53	InternalX86EnablePaging32 ENDP\r
	54	\r
	55	END\r