projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| b1ff428c | 1 | #------------------------------------------------------------------------------\r |
| 2 | #\r | |
| bb817c56 HT |
3 | # Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
| 4 | # This program and the accompanying materials\r | |
| b1ff428c | 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.S\r | |
| 15 | #\r | |
| 16 | # Abstract:\r | |
| 17 | #\r | |
| 18 | # AsmCpuid function\r | |
| 19 | #\r | |
| 20 | # Notes:\r | |
| 21 | #\r | |
| 22 | #------------------------------------------------------------------------------\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 | |
| d5172f91 | 35 | ASM_GLOBAL ASM_PFX(AsmCpuid)\r |
| b1ff428c | 36 | ASM_PFX(AsmCpuid):\r |
| 37 | push %rbx\r | |
| 38 | mov %ecx, %eax\r | |
| 39 | push %rax # save Index on stack\r | |
| 40 | push %rdx\r | |
| 41 | cpuid\r | |
| 42 | test %r9, %r9\r | |
| 43 | jz L1\r | |
| 44 | mov %ecx, (%r9)\r | |
| 45 | L1:\r | |
| 46 | pop %rcx\r | |
| 47 | jrcxz L2\r | |
| 48 | mov %eax, (%rcx)\r | |
| 49 | L2:\r | |
| 50 | mov %r8, %rcx\r | |
| 51 | jrcxz L3\r | |
| 52 | mov %ebx, (%rcx)\r | |
| 53 | L3:\r | |
| 54 | mov 0x38(%rsp), %rcx\r | |
| 55 | jrcxz L4\r | |
| 56 | mov %edx, (%rcx)\r | |
| 57 | L4:\r | |
| 58 | pop %rax # restore Index to rax as return value\r | |
| 59 | pop %rbx\r | |
| 60 | ret\r |