806ea08bb2
If we dont have a constant TSC rate, timestamp table has odd leaps and may appear to run backwards. Add functionality to apply a factor such that all stamps are in the same timebase. Change-Id: Idab9c2c00e117c4d247db8cc9a2897640fa01edd Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/19330 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/*
|
|
* This file is part of the coreboot project.
|
|
*
|
|
* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef __TIMESTAMP_H__
|
|
#define __TIMESTAMP_H__
|
|
|
|
#include <commonlib/timestamp_serialized.h>
|
|
|
|
#if IS_ENABLED(CONFIG_COLLECT_TIMESTAMPS) && (IS_ENABLED(CONFIG_EARLY_CBMEM_INIT) \
|
|
|| !defined(__PRE_RAM__))
|
|
/*
|
|
* timestamp_init() needs to be called once for each of these cases:
|
|
* 1. __PRE_RAM__ (bootblock, romstage, verstage, etc) and
|
|
* 2. !__PRE_RAM__ (ramstage)
|
|
* The latter is taken care of by the generic coreboot infrastructure so
|
|
* it's up to the chipset/arch to call timestamp_init() in *one* of
|
|
* the __PRE_RAM__ stages. If multiple calls are made timestamps will be lost.
|
|
*/
|
|
void timestamp_init(uint64_t base);
|
|
/*
|
|
* Add a new timestamp. Depending on cbmem is available or not, this timestamp
|
|
* will be stored to cbmem / timestamp cache.
|
|
*/
|
|
void timestamp_add(enum timestamp_id id, uint64_t ts_time);
|
|
/* Calls timestamp_add with current timestamp. */
|
|
void timestamp_add_now(enum timestamp_id id);
|
|
|
|
/* Apply a factor of N/M to all timestamps recorded so far. */
|
|
void timestamp_rescale_table(uint16_t N, uint16_t M);
|
|
|
|
#else
|
|
#define timestamp_init(base)
|
|
#define timestamp_add(id, time)
|
|
#define timestamp_add_now(id)
|
|
#define timestamp_rescale_table(N, M)
|
|
#endif
|
|
|
|
/* Implemented by the architecture code */
|
|
uint64_t timestamp_get(void);
|
|
uint64_t get_initial_timestamp(void);
|
|
/* Returns timestamp tick frequency in MHz. */
|
|
int timestamp_tick_freq_mhz(void);
|
|
|
|
#endif
|