src/mainboard/google/storm/reset.c

   1 /*
   2  *
   3  * This file is part of the coreboot project.
   4  *
   5  * Copyright (c) 2014, The Linux Foundation. All rights reserved.
   6  * Copyright 2014 Google Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <console/console.h>
  19 #include <soc/iomap.h>
  20 #include <reset.h>
  21
  22 /* Watchdog bite time set to default reset value */
  23 #define RESET_WDT_BITE_TIME 0x31F3
  24
  25 /* Watchdog bark time value is kept larger than the watchdog timeout
  26  * of 0x31F3, effectively disabling the watchdog bark interrupt
  27  */
  28 #define RESET_WDT_BARK_TIME (5 * RESET_WDT_BITE_TIME)
  29
  30 static void wdog_reset(void)
  31 {
  32         printk(BIOS_DEBUG, "\nResetting with watchdog!\n");
  33
  34         write32(APCS_WDT0_EN, 0);
  35         write32(APCS_WDT0_RST, 1);
  36         write32(APCS_WDT0_BARK_TIME, RESET_WDT_BARK_TIME);
  37         write32(APCS_WDT0_BITE_TIME, RESET_WDT_BITE_TIME);
  38         write32(APCS_WDT0_EN, 1);
  39         write32(APCS_WDT0_CPU0_WDOG_EXPIRED_ENABLE, 1);
  40 }
  41
  42 void do_board_reset(void)
  43 {
  44         wdog_reset();
  45 }