mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 19:26:16 +09:00
6dbe0cce3f
This change turns on the code which allows u-boot to add timestamps to the timestamp table created by coreboot. Since u-boot does not use the tsc_t like structure to represent HW counter readings, this structure is being replaced by 64 bit integer. The timestamp_init() function is now initializing the base timer value used by u-boot to calculate the HW counter increments. Timestamp facility is initialized as soon as the timestamp table pointer is found in the coreboot table. The u-boot generated timer events' ID will start at 1000 to clearly separate u-boot events from coreboot events in the timer trace. Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Signed-off-by: Stefan Reinauer <reinauer@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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#include <common.h>
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#include <asm/arch/timestamp.h>
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#include <asm/arch/sysinfo.h>
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#include <linux/compiler.h>
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struct timestamp_entry {
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uint32_t entry_id;
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uint64_t entry_stamp;
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} __packed;
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struct timestamp_table {
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uint64_t base_time;
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uint32_t max_entries;
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uint32_t num_entries;
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struct timestamp_entry entries[0]; /* Variable number of entries */
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} __packed;
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static struct timestamp_table *ts_table __attribute__((section(".data")));
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void timestamp_init(void)
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{
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ts_table = lib_sysinfo.tstamp_table;
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timer_set_tsc_base(ts_table->base_time);
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timestamp_add_now(TS_U_BOOT_INITTED);
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}
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void timestamp_add(enum timestamp_id id, uint64_t ts_time)
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{
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struct timestamp_entry *tse;
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if (!ts_table || (ts_table->num_entries == ts_table->max_entries))
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return;
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tse = &ts_table->entries[ts_table->num_entries++];
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tse->entry_id = id;
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tse->entry_stamp = ts_time - ts_table->base_time;
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}
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void timestamp_add_now(enum timestamp_id id)
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{
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timestamp_add(id, rdtsc());
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}
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