projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 70271699 JJ |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r | |
| 9344f092 | 4 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| 70271699 JJ |
5 | ;\r |
| 6 | ; Module Name:\r | |
| 7 | ;\r | |
| 8 | ; WriteMsr64.Asm\r | |
| 9 | ;\r | |
| 10 | ; Abstract:\r | |
| 11 | ;\r | |
| 12 | ; AsmWriteMsr64 function\r | |
| 13 | ;\r | |
| 14 | ; Notes:\r | |
| 15 | ;\r | |
| 16 | ;------------------------------------------------------------------------------\r | |
| 17 | \r | |
| 18 | DEFAULT REL\r | |
| 19 | SECTION .text\r | |
| 20 | \r | |
| 21 | ;------------------------------------------------------------------------------\r | |
| 22 | ; UINT64\r | |
| 23 | ; EFIAPI\r | |
| 24 | ; AsmWriteMsr64 (\r | |
| 25 | ; IN UINT32 Index,\r | |
| 26 | ; IN UINT64 Value\r | |
| 27 | ; );\r | |
| 28 | ;------------------------------------------------------------------------------\r | |
| 29 | global ASM_PFX(AsmWriteMsr64)\r | |
| 30 | ASM_PFX(AsmWriteMsr64):\r | |
| 31 | mov rax, rdx ; meanwhile, rax <- return value\r | |
| 32 | shr rdx, 0x20 ; edx:eax contains the value to write\r | |
| 33 | wrmsr\r | |
| 34 | ret\r | |
| 35 | \r |