/* * This file is part of the coreboot project. * * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. * Copyright (C) 2017 Siemens AG * * 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); /* * Get the time since boot scaled in microseconds. Therefore use the base time * of the timestamps to get the initial value which is subtracted from * current timestamp at call time. This will provide a more reliable value even * if the TSC is not reset on soft reset or warm start. */ uint32_t get_us_since_boot(void); #else #define timestamp_init(base) #define timestamp_add(id, time) #define timestamp_add_now(id) #define timestamp_rescale_table(N, M) #define get_us_since_boot() 0 #endif /** * Workaround for guard combination above. * Looks like CONFIG_EARLY_CBMEM_INIT selects * timestamp.c to be build. */ #if IS_ENABLED(CONFIG_COLLECT_TIMESTAMPS) /* Implemented by the architecture code */ uint64_t timestamp_get(void); #else #define timestamp_get() 0 #endif uint64_t get_initial_timestamp(void); /* Returns timestamp tick frequency in MHz. */ int timestamp_tick_freq_mhz(void); #endif