projects / mirror_edk2.git / blame
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|---|---|---|
| fd5eb53d JJ |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r | |
| 4 | ; 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 | ; CpuId.Asm\r | |
| 15 | ;\r | |
| 16 | ; Abstract:\r | |
| 17 | ;\r | |
| 18 | ; AsmCpuid function\r | |
| 19 | ;\r | |
| 20 | ; Notes:\r | |
| 21 | ;\r | |
| 22 | ;------------------------------------------------------------------------------\r | |
| 23 | \r | |
| 24 | DEFAULT REL\r | |
| 25 | SECTION .text\r | |
| 26 | \r | |
| 27 | ;------------------------------------------------------------------------------\r | |
| 28 | ; VOID\r | |
| 29 | ; EFIAPI\r | |
| 30 | ; AsmCpuid (\r | |
| 31 | ; IN UINT32 RegisterInEax,\r | |
| 32 | ; OUT UINT32 *RegisterOutEax OPTIONAL,\r | |
| 33 | ; OUT UINT32 *RegisterOutEbx OPTIONAL,\r | |
| 34 | ; OUT UINT32 *RegisterOutEcx OPTIONAL,\r | |
| 35 | ; OUT UINT32 *RegisterOutEdx OPTIONAL\r | |
| 36 | ; )\r | |
| 37 | ;------------------------------------------------------------------------------\r | |
| 38 | global ASM_PFX(AsmCpuid)\r | |
| 39 | ASM_PFX(AsmCpuid):\r | |
| 40 | push rbx\r | |
| 41 | mov eax, ecx\r | |
| 42 | push rax ; save Index on stack\r | |
| 43 | push rdx\r | |
| 44 | cpuid\r | |
| 45 | test r9, r9\r | |
| 46 | jz .0\r | |
| 47 | mov [r9], ecx\r | |
| 48 | .0:\r | |
| 49 | pop rcx\r | |
| 50 | jrcxz .1\r | |
| 51 | mov [rcx], eax\r | |
| 52 | .1:\r | |
| 53 | mov rcx, r8\r | |
| 54 | jrcxz .2\r | |
| 55 | mov [rcx], ebx\r | |
| 56 | .2:\r | |
| 57 | mov rcx, [rsp + 0x38]\r | |
| 58 | jrcxz .3\r | |
| 59 | mov [rcx], edx\r | |
| 60 | .3:\r | |
| 61 | pop rax ; restore Index to rax as return value\r | |
| 62 | pop rbx\r | |
| 63 | ret\r | |
| 64 | \r |