diff options
| -rw-r--r-- | arch/arm/mach-k3/am64x/boot.c | 36 | ||||
| -rw-r--r-- | arch/arm/mach-k3/include/mach/am64_hardware.h | 18 |
2 files changed, 54 insertions, 0 deletions
diff --git a/arch/arm/mach-k3/am64x/boot.c b/arch/arm/mach-k3/am64x/boot.c index ce8ae941be6..bf8e1a5cb44 100644 --- a/arch/arm/mach-k3/am64x/boot.c +++ b/arch/arm/mach-k3/am64x/boot.c @@ -103,3 +103,39 @@ u32 get_boot_device(void) return bootmedia; } + +const char *get_reset_reason(void) +{ + u32 reset_reason = readl(CTRLMMR_MCU_RST_SRC); + + /* After reading reset source register, software must clear it */ + if (reset_reason) + writel(reset_reason, CTRLMMR_MCU_RST_SRC); + + if (reset_reason == 0 || + (reset_reason & (RST_SRC_SW_MAIN_POR_FROM_MAIN | + RST_SRC_SW_MAIN_POR_FROM_MCU))) + return "POR"; + + if (reset_reason & (RST_SRC_SAFETY_ERR | RST_SRC_MAIN_ESM_ERR)) + return "ESM"; + + if (reset_reason & (RST_SRC_SW_MAIN_WARM_FROM_MAIN | + RST_SRC_SW_MAIN_WARM_FROM_MCU | + RST_SRC_SW_MCU_WARM_RST)) + return "RST"; + + if (reset_reason & (RST_SRC_SMS_WARM_RST | RST_SRC_SMS_COLD_RST)) + return "DMSC"; + + if (reset_reason & RST_SRC_DEBUG_RST) + return "JTAG"; + + if (reset_reason & RST_SRC_THERMAL_RST) + return "THERMAL"; + + if (reset_reason & (RST_SRC_MAIN_RESET_PIN | RST_SRC_MCU_RESET_PIN)) + return "PIN"; + + return "UNKNOWN"; +} diff --git a/arch/arm/mach-k3/include/mach/am64_hardware.h b/arch/arm/mach-k3/include/mach/am64_hardware.h index 105b42986de..2717da07690 100644 --- a/arch/arm/mach-k3/include/mach/am64_hardware.h +++ b/arch/arm/mach-k3/include/mach/am64_hardware.h @@ -46,6 +46,24 @@ /* Use Last 2K as Scratch pad */ #define TI_SRAM_SCRATCH_BOARD_EEPROM_START 0x7019f800 +/* Reset Reason Detection */ +#define CTRLMMR_MCU_RST_SRC (MCU_CTRL_MMR0_BASE + 0x18178) + +/* Reset causes by bit mapping */ +#define RST_SRC_SAFETY_ERR BIT(31) +#define RST_SRC_MAIN_ESM_ERR BIT(30) +#define RST_SRC_SW_MAIN_POR_FROM_MAIN BIT(25) +#define RST_SRC_SW_MAIN_POR_FROM_MCU BIT(24) +#define RST_SRC_SW_MAIN_WARM_FROM_MAIN BIT(21) +#define RST_SRC_SW_MAIN_WARM_FROM_MCU BIT(20) +#define RST_SRC_SW_MCU_WARM_RST BIT(16) +#define RST_SRC_SMS_WARM_RST BIT(13) +#define RST_SRC_SMS_COLD_RST BIT(12) +#define RST_SRC_DEBUG_RST BIT(8) +#define RST_SRC_THERMAL_RST BIT(4) +#define RST_SRC_MAIN_RESET_PIN BIT(2) +#define RST_SRC_MCU_RESET_PIN BIT(0) + #if defined(CONFIG_SYS_K3_SPL_ATF) && !defined(__ASSEMBLY__) #define AM64X_DEV_RTI8 127 |