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/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/mmio.h>
#include <assert.h>
#include <bootstate.h>
#include <console/console.h>
#include <ec/google/chromeec/ec.h>
#include <elog.h>
#include <reset.h>
#include <symbols.h>
#include "chromeos.h"
#define WATCHDOG_TOMBSTONE_MAGIC 0x9d2f41a7
static void elog_handle_watchdog_tombstone(void *unused)
{
bool flag = false;
if (CONFIG(CHROMEOS_USE_EC_WATCHDOG_FLAG))
flag |= google_chromeec_get_ap_watchdog_flag();
flag |= reset_watchdog_tombstone();
if (flag)
elog_add_event(ELOG_TYPE_ASYNC_HW_TIMER_EXPIRED);
}
BOOT_STATE_INIT_ENTRY(BS_POST_DEVICE, BS_ON_ENTRY,
elog_handle_watchdog_tombstone, NULL);
bool reset_watchdog_tombstone(void)
{
if (!REGION_SIZE(watchdog_tombstone))
return false;
bool flag = (read32(_watchdog_tombstone) == WATCHDOG_TOMBSTONE_MAGIC);
write32(_watchdog_tombstone, 0);
return flag;
}
void mark_watchdog_tombstone(void)
{
assert(REGION_SIZE(watchdog_tombstone));
write32(_watchdog_tombstone, WATCHDOG_TOMBSTONE_MAGIC);
}
void reboot_from_watchdog(void)
{
printk(BIOS_INFO, "Last reset was watchdog, reboot again to reset TPM!\n");
mark_watchdog_tombstone();
board_reset();
}
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