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/*
* This file is part of the coreboot project.
*
* Copyright 2013 Google Inc.
*
* 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.
*/
#include <device/mmio.h>
#include <delay.h>
#include <soc/clk.h>
#include <stdint.h>
#include <timer.h>
static const uint32_t clocks_per_usec = MCT_HZ/1000000;
static uint64_t mct_raw_value(void)
{
uint64_t upper = read32(&exynos_mct->g_cnt_u);
uint64_t lower = read32(&exynos_mct->g_cnt_l);
return (upper << 32) | lower;
}
void init_timer(void)
{
write32(&exynos_mct->g_tcon, read32(&exynos_mct->g_tcon) | (0x1 << 8));
}
void timer_monotonic_get(struct mono_time *mt)
{
/* We don't have to call mct_start() here
* because it was already called in the bootblock
*/
mono_time_set_usecs(mt, mct_raw_value() / clocks_per_usec);
}
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