| /* |
| * 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); |
| } |
