diff options
Diffstat (limited to 'meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0023-Add-WDT-to-u-boot-to-cover-booting-failures.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0023-Add-WDT-to-u-boot-to-cover-booting-failures.patch | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0023-Add-WDT-to-u-boot-to-cover-booting-failures.patch b/meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0023-Add-WDT-to-u-boot-to-cover-booting-failures.patch new file mode 100644 index 000000000..d5093bba6 --- /dev/null +++ b/meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0023-Add-WDT-to-u-boot-to-cover-booting-failures.patch @@ -0,0 +1,88 @@ +From c4aebdd00365539dc155e88ee4f6b88cccdccd8f Mon Sep 17 00:00:00 2001 +From: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +Date: Wed, 16 Sep 2020 13:25:36 -0700 +Subject: [PATCH] Add WDT to u-boot to cover booting failures + +This commit enables WDT2 before loading kernel image to make BMC +reset to cover booting failures. If BMC meet any failure or if +systemd can't initiate watchdog timer service properly, BMC will +be reset by this watchdog. In case if u-boot meets a kernel image +decoding issue, this watchdog will be immediately disabled and BMC +will stay in u-boot console. + +Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +--- + board/aspeed/ast2600_intel/intel.c | 23 ++++++++++++++++++++++- + common/bootm_os.c | 11 +++++++++++ + 2 files changed, 33 insertions(+), 1 deletion(-) + +diff --git a/board/aspeed/ast2600_intel/intel.c b/board/aspeed/ast2600_intel/intel.c +index 807202295757..af2af9786926 100644 +--- a/board/aspeed/ast2600_intel/intel.c ++++ b/board/aspeed/ast2600_intel/intel.c +@@ -474,12 +474,33 @@ void board_init(void) + */ + + #ifdef CONFIG_WATCHDOG +-/* watchdog stuff */ ++#define WDT2_BASE 0x1e785040 ++#define WDT_COUNTER_STATUS 0x00 ++#define WDT_COUNTER_RELOAD_VALUE 0x04 ++#define WDT_COUNTER_RESTART_CTRL 0x08 ++#define WDT_RESTART_VALUE 0x4755 ++#define WDT_CTRL 0x0c ++#define WDT_RST_BY_SOC_RST BIT(4) ++#define WDT_SYS_RESET BIT(1) ++#define WDT_ENABLE BIT(0) ++#define WDT_TIMEOUT_DEFAULT 0x6000000 /* ~100 seconds */ ++ + void watchdog_init(void) + { ++ writel(0, WDT2_BASE + WDT_CTRL); ++ writel(WDT_TIMEOUT_DEFAULT, WDT2_BASE + WDT_COUNTER_RELOAD_VALUE); ++ writel(WDT_RESTART_VALUE, WDT2_BASE + WDT_COUNTER_RESTART_CTRL); ++ writel(WDT_RST_BY_SOC_RST | WDT_SYS_RESET | WDT_ENABLE, ++ WDT2_BASE + WDT_CTRL); + } + + void watchdog_reset(void) + { ++ writel(WDT_RESTART_VALUE, WDT2_BASE + WDT_COUNTER_RESTART_CTRL); ++} ++ ++void watchdog_disable(void) ++{ ++ writel(0, WDT2_BASE + WDT_CTRL); + } + #endif +diff --git a/common/bootm_os.c b/common/bootm_os.c +index 855c471c28e6..05836e76c8e8 100644 +--- a/common/bootm_os.c ++++ b/common/bootm_os.c +@@ -511,12 +511,23 @@ __weak void board_preboot_os(void) + /* please define board specific board_preboot_os() */ + } + ++#ifdef CONFIG_WATCHDOG ++extern void watchdog_init(void); ++extern void watchdog_disable(void); ++#endif ++ + int boot_selected_os(int argc, char * const argv[], int state, + bootm_headers_t *images, boot_os_fn *boot_fn) + { + arch_preboot_os(); + board_preboot_os(); ++#ifdef CONFIG_WATCHDOG ++ watchdog_init(); ++#endif + boot_fn(state, argc, argv, images); ++#ifdef CONFIG_WATCHDOG ++ watchdog_disable(); ++#endif + + /* Stand-alone may return when 'autostart' is 'no' */ + if (images->os.type == IH_TYPE_STANDALONE || +-- +2.17.1 + |