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1 | #------------------------------------------------------------------------------\r |
2 | #\r |
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3 | # Copyright (c) 2006 - 2008, Intel Corporation\r |
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4 | # All rights reserved. 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 | # ReadTsc.S\r |
15 | #\r |
16 | # Abstract:\r |
17 | #\r |
18 | # AsmReadTsc function\r |
19 | #\r |
20 | # Notes:\r |
21 | #\r |
22 | #------------------------------------------------------------------------------\r |
23 | \r |
24 | \r |
25 | #------------------------------------------------------------------------------\r |
26 | # UINT64\r |
27 | # EFIAPI\r |
28 | # AsmReadTsc (\r |
29 | # VOID\r |
30 | # );\r |
31 | #------------------------------------------------------------------------------\r |
32 | .global ASM_PFX(AsmReadTsc)\r |
33 | .align 16\r |
34 | ASM_PFX(AsmReadTsc):\r |
35 | rdtsc\r |
36 | shl $0x20, %rdx\r |
37 | or %rdx, %rax\r |
38 | ret\r |