5 files changed, 15 insertions, 4 deletions
diff --git a/src/mainboard/google/oak/mainboard.c b/src/mainboard/google/oak/mainboard.c
index 4208730d67..e99a5c02de 100644
--- a/src/mainboard/google/oak/mainboard.c
+++ b/src/mainboard/google/oak/mainboard.c
@@ -164,6 +164,7 @@ static void mainboard_init(device_t dev)
 	configure_ext_buck();
 
 	elog_init();
+	elog_add_watchdog_reset();
 	elog_add_boot_reason();
 }
 
diff --git a/src/soc/mediatek/mt8173/include/soc/memlayout.ld b/src/soc/mediatek/mt8173/include/soc/memlayout.ld
index 771f32652e..5b92153142 100644
--- a/src/soc/mediatek/mt8173/include/soc/memlayout.ld
+++ b/src/soc/mediatek/mt8173/include/soc/memlayout.ld
@@ -40,7 +40,8 @@ SECTIONS
 	SRAM_START(0x00100000)
 	VBOOT2_WORK(0x00100000, 12K)
 	PRERAM_CBMEM_CONSOLE(0x00103000, 16K)
-	PRERAM_CBFS_CACHE(0x00107000, 16K)
+	WATCHDOG_TOMBSTONE(0x00107000, 4)
+	PRERAM_CBFS_CACHE(0x00107004, 16K - 4)
 	TIMESTAMP(0x0010B000, 4K)
 	ROMSTAGE(0x0010C000, 92K)
 	STACK(0x00124000, 16K)
diff --git a/src/soc/mediatek/mt8173/wdt.c b/src/soc/mediatek/mt8173/wdt.c
index ba63c13b6d..93ffe09209 100644
--- a/src/soc/mediatek/mt8173/wdt.c
+++ b/src/soc/mediatek/mt8173/wdt.c
@@ -18,6 +18,7 @@
 #include <reset.h>
 #include <soc/addressmap.h>
 #include <soc/wdt.h>
+#include <vendorcode/google/chromeos/chromeos.h>
 
 static struct mt8173_wdt_regs * const mt8173_wdt = (void *)RGU_BASE;
 
@@ -29,9 +30,10 @@ int mtk_wdt_init(void)
 	wdt_sta = read32(&mt8173_wdt->wdt_status);
 
 	printk(BIOS_INFO, "WDT: Last reset was ");
-	if (wdt_sta & MTK_WDT_STA_HW_RST)
+	if (wdt_sta & MTK_WDT_STA_HW_RST) {
 		printk(BIOS_INFO, "hardware watchdog\n");
-	else if (wdt_sta & MTK_WDT_STA_SW_RST)
+		mark_watchdog_tombstone();
+	} else if (wdt_sta & MTK_WDT_STA_SW_RST)
 		printk(BIOS_INFO, "normal software reboot\n");
 	else if (wdt_sta & MTK_WDT_STA_SPM_RST)
 		printk(BIOS_INFO, "SPM reboot\n");
diff --git a/src/vendorcode/google/chromeos/chromeos.h b/src/vendorcode/google/chromeos/chromeos.h
index 03f1516ee0..57a2f71b29 100644
--- a/src/vendorcode/google/chromeos/chromeos.h
+++ b/src/vendorcode/google/chromeos/chromeos.h
@@ -34,10 +34,12 @@ void elog_add_boot_reason(void);
 
 /* functions implemented in watchdog.c */
 void elog_add_watchdog_reset(void);
+void mark_watchdog_tombstone(void);
 void reboot_from_watchdog(void);
 #else
 static inline void elog_add_boot_reason(void) { return; }
 static inline void elog_add_watchdog_reset(void) { return; }
+static inline void mark_watchdog_tombstone(void) { return; }
 static inline void reboot_from_watchdog(void) { return; }
 #endif /* CONFIG_CHROMEOS */
 
diff --git a/src/vendorcode/google/chromeos/watchdog.c b/src/vendorcode/google/chromeos/watchdog.c
index 79f7dde711..a2b18b75e5 100644
--- a/src/vendorcode/google/chromeos/watchdog.c
+++ b/src/vendorcode/google/chromeos/watchdog.c
@@ -30,9 +30,14 @@ void elog_add_watchdog_reset(void)
 	write32(_watchdog_tombstone, 0);
 }
 
+void mark_watchdog_tombstone(void)
+{
+	write32(_watchdog_tombstone, WATCHDOG_TOMBSTONE_MAGIC);
+}
+
 void reboot_from_watchdog(void)
 {
 	printk(BIOS_INFO, "Last reset was watchdog, reboot again to reset TPM!\n");
-	write32(_watchdog_tombstone, WATCHDOG_TOMBSTONE_MAGIC);
+	mark_watchdog_tombstone();
 	hard_reset();
 }