src/mainboard/google/storm/reset.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <device/mmio.h>
   5 #include <soc/iomap.h>
   6 #include <reset.h>
   7
   8 /* Watchdog bite time set to default reset value */
   9 #define RESET_WDT_BITE_TIME 0x31F3
  10
  11 /* Watchdog bark time value is kept larger than the watchdog timeout
  12  * of 0x31F3, effectively disabling the watchdog bark interrupt
  13  */
  14 #define RESET_WDT_BARK_TIME (5 * RESET_WDT_BITE_TIME)
  15
  16 static void wdog_reset(void)
  17 {
  18         printk(BIOS_DEBUG, "\nResetting with watchdog!\n");
  19
  20         write32(APCS_WDT0_EN, 0);
  21         write32(APCS_WDT0_RST, 1);
  22         write32(APCS_WDT0_BARK_TIME, RESET_WDT_BARK_TIME);
  23         write32(APCS_WDT0_BITE_TIME, RESET_WDT_BITE_TIME);
  24         write32(APCS_WDT0_EN, 1);
  25         write32(APCS_WDT0_CPU0_WDOG_EXPIRED_ENABLE, 1);
  26 }
  27
  28 void do_board_reset(void)
  29 {
  30         wdog_reset();
  31 }