Gabe Black | d4d29a1 | 2014-04-10 02:36:49 -0700 | [diff] [blame] | 1 | /* |
Gabe Black | d4d29a1 | 2014-04-10 02:36:49 -0700 | [diff] [blame] | 2 | * |
| 3 | * Copyright (C) 2008 Advanced Micro Devices, Inc. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. The name of the author may not be used to endorse or promote products |
| 14 | * derived from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | /** |
| 30 | * @file x86/timer.c |
| 31 | * x86 specific timer routines |
| 32 | */ |
| 33 | |
| 34 | #include <libpayload.h> |
| 35 | #include <arch/rdtsc.h> |
Yidi Lin | eabdd02 | 2023-11-02 14:17:02 +0800 | [diff] [blame^] | 36 | #include <assert.h> |
Gabe Black | d4d29a1 | 2014-04-10 02:36:49 -0700 | [diff] [blame] | 37 | |
Yidi Lin | eabdd02 | 2023-11-02 14:17:02 +0800 | [diff] [blame^] | 38 | uint32_t timer_hz(void) |
Gabe Black | d4d29a1 | 2014-04-10 02:36:49 -0700 | [diff] [blame] | 39 | { |
Yidi Lin | eabdd02 | 2023-11-02 14:17:02 +0800 | [diff] [blame^] | 40 | assert(UINT32_MAX / 1000 >= lib_sysinfo.cpu_khz); |
| 41 | return lib_sysinfo.cpu_khz * 1000; |
Gabe Black | d4d29a1 | 2014-04-10 02:36:49 -0700 | [diff] [blame] | 42 | } |
| 43 | |
| 44 | uint64_t timer_raw_value(void) |
| 45 | { |
| 46 | return rdtsc(); |
| 47 | } |