/* * 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 <arch/io.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); }