[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EdkIIGlueLib / Library / BaseLib / X64 / CpuId.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
;   CpuId.Asm\r
;\r
; Abstract:\r
;\r
;   AsmCpuid function\r
;\r
; Notes:\r
;\r
;------------------------------------------------------------------------------\r
\r
    .code\r
\r
;------------------------------------------------------------------------------\r
;  VOID\r
;  EFIAPI\r
;  AsmCpuid (\r
;    IN   UINT32  RegisterInEax,\r
;    OUT  UINT32  *RegisterOutEax  OPTIONAL,\r
;    OUT  UINT32  *RegisterOutEbx  OPTIONAL,\r
;    OUT  UINT32  *RegisterOutEcx  OPTIONAL,\r
;    OUT  UINT32  *RegisterOutEdx  OPTIONAL\r
;    )\r
;------------------------------------------------------------------------------\r
AsmCpuid    PROC    USES    rbx\r
    mov     eax, ecx\r
    push    rax                         ; save Index on stack\r
    push    rdx\r
    cpuid\r
    test    r9, r9\r
    jz      @F\r
    mov     [r9], ecx\r
@@:\r
    pop     rcx\r
    jrcxz   @F\r
    mov     [rcx], eax\r
@@:\r
    mov     rcx, r8\r
    jrcxz   @F\r
    mov     [rcx], ebx\r
@@:\r
    mov     rcx, [rsp + 38h]\r
    jrcxz   @F\r
    mov     [rcx], edx\r
@@:\r
    pop     rax                         ; restore Index to rax as return value\r
    ret\r
AsmCpuid    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	; CpuId.Asm\r
	13	;\r
	14	; Abstract:\r
	15	;\r
	16	; AsmCpuid function\r
	17	;\r
	18	; Notes:\r
	19	;\r
	20	;------------------------------------------------------------------------------\r
	21	\r
	22	.code\r
	23	\r
	24	;------------------------------------------------------------------------------\r
	25	; VOID\r
	26	; EFIAPI\r
	27	; AsmCpuid (\r
	28	; IN UINT32 RegisterInEax,\r
	29	; OUT UINT32 *RegisterOutEax OPTIONAL,\r
	30	; OUT UINT32 *RegisterOutEbx OPTIONAL,\r
	31	; OUT UINT32 *RegisterOutEcx OPTIONAL,\r
	32	; OUT UINT32 *RegisterOutEdx OPTIONAL\r
	33	; )\r
	34	;------------------------------------------------------------------------------\r
	35	AsmCpuid PROC USES rbx\r
	36	mov eax, ecx\r
	37	push rax ; save Index on stack\r
	38	push rdx\r
	39	cpuid\r
	40	test r9, r9\r
	41	jz @F\r
	42	mov [r9], ecx\r
	43	@@:\r
	44	pop rcx\r
	45	jrcxz @F\r
	46	mov [rcx], eax\r
	47	@@:\r
	48	mov rcx, r8\r
	49	jrcxz @F\r
	50	mov [rcx], ebx\r
	51	@@:\r
	52	mov rcx, [rsp + 38h]\r
	53	jrcxz @F\r
	54	mov [rcx], edx\r
	55	@@:\r
	56	pop rax ; restore Index to rax as return value\r
	57	ret\r
	58	AsmCpuid ENDP\r
	59	\r
	60	END\r