5817c56d19
Change-Id: I746ea7805bae553a146130994d8174aa2e189610 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/43368 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef __TIMESTAMP_H__
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#define __TIMESTAMP_H__
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#include <commonlib/timestamp_serialized.h>
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#include <stdint.h>
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#if CONFIG(COLLECT_TIMESTAMPS)
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/*
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* timestamp_init() needs to be called once in *one* of the ENV_ROMSTAGE_OR_BEFORE
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* stages (bootblock, romstage, verstage, etc). It's up to the chipset/arch
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* to make the call in the earliest stage, otherwise some timestamps will be lost.
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* For x86 ENV_ROMSTAGE call must be made before CAR is torn down.
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*/
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void timestamp_init(uint64_t base);
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/*
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* Add a new timestamp. For ENV_ROMSTAGE_OR_BEFORE, this timestamp will be stored
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* inside REGION(timestamp) before cbmem comes online. For later stages, timestamps
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* added before cbmem_[recovery|initialize] calls will be lost.
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*/
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void timestamp_add(enum timestamp_id id, uint64_t ts_time);
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/* Calls timestamp_add with current timestamp. */
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void timestamp_add_now(enum timestamp_id id);
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/* Apply a factor of N/M to all timestamps recorded so far. */
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void timestamp_rescale_table(uint16_t N, uint16_t M);
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/*
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* Get the time since boot scaled in microseconds. Therefore use the base time
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* of the timestamps to get the initial value which is subtracted from
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* current timestamp at call time. This will provide a more reliable value even
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* if the TSC is not reset on soft reset or warm start.
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*/
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uint32_t get_us_since_boot(void);
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#else
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#define timestamp_init(base)
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#define timestamp_add(id, time)
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#define timestamp_add_now(id)
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#define timestamp_rescale_table(N, M)
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#define get_us_since_boot() 0
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#endif
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/**
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* Workaround for guard combination above.
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*/
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#if CONFIG(COLLECT_TIMESTAMPS)
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/* Implemented by the architecture code */
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uint64_t timestamp_get(void);
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#else
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#define timestamp_get() 0
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#endif
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uint64_t get_initial_timestamp(void);
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/* Returns timestamp tick frequency in MHz. */
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int timestamp_tick_freq_mhz(void);
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#endif
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