/* * 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/cache.h> #include <soc/power.h> #include <soc/wakeup.h> void wakeup(void) { if (wakeup_need_reset()) power_reset(); power_init(); /* Ensure ps_hold_setup() for early wakeup. */ dcache_mmu_disable(); power_exit_wakeup(); /* Should never return. If we do, reset. */ power_reset(); } int get_wakeup_state(void) { uint32_t status = power_read_reset_status(); /* DIDLE/LPA can be resumed without clock reset (ex, bootblock), * and SLEEP requires resetting clock (should be done in ROM stage). */ if (status == S5P_CHECK_DIDLE || status == S5P_CHECK_LPA) return WAKEUP_DIRECT; if (status == S5P_CHECK_SLEEP) return WAKEUP_NEED_CLOCK_RESET; return IS_NOT_WAKEUP; } void wakeup_enable_uart(void) { power_release_uart_retention(); }