Read reset reason reg and show it in log and also save it as variable. Clearing reset reason when it is read to show only one status

Signed-off-by: Michal Simek michal.simek@xilinx.com ---

Changes in v2: - Clear stats after read - Remove print argument - Sync table order to fit with macros

arch/arm/include/asm/arch-zynqmp/hardware.h | 12 +++++- board/xilinx/zynqmp/zynqmp.c | 43 +++++++++++++++++++++ 2 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/arch-zynqmp/hardware.h b/arch/arm/include/asm/arch-zynqmp/hardware.h index 3f1f9498e356..7961a247e196 100644 --- a/arch/arm/include/asm/arch-zynqmp/hardware.h +++ b/arch/arm/include/asm/arch-zynqmp/hardware.h @@ -33,6 +33,14 @@ #define PS_MODE2 BIT(2) #define PS_MODE3 BIT(3)

+#define RESET_REASON_DEBUG_SYS BIT(6) +#define RESET_REASON_SOFT BIT(5) +#define RESET_REASON_SRST BIT(4) +#define RESET_REASON_PSONLY BIT(3) +#define RESET_REASON_PMU BIT(2) +#define RESET_REASON_INTERNAL BIT(1) +#define RESET_REASON_EXTERNAL BIT(0) + struct crlapb_regs { u32 reserved0[36]; u32 cpu_r5_ctrl; /* 0x90 */ @@ -40,7 +48,9 @@ struct crlapb_regs { u32 timestamp_ref_ctrl; /* 0x128 */ u32 reserved2[53]; u32 boot_mode; /* 0x200 */ - u32 reserved3[14]; + u32 reserved3_0[7]; + u32 reset_reason; /* 0x220 */ + u32 reserved3_1[6]; u32 rst_lpd_top; /* 0x23C */ u32 reserved4[4]; u32 boot_pin_ctrl; /* 0x250 */ diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c index 551921b888a0..f909c663357d 100644 --- a/board/xilinx/zynqmp/zynqmp.c +++ b/board/xilinx/zynqmp/zynqmp.c @@ -476,6 +476,47 @@ static int create_mmc_boot_commands(void) return 0; }

+static const struct { + u32 bit; + const char *name; +} reset_reasons[] = { + { RESET_REASON_DEBUG_SYS, "DEBUG" }, + { RESET_REASON_SOFT, "SOFT" }, + { RESET_REASON_SRST, "SRST" }, + { RESET_REASON_PSONLY, "PS-ONLY" }, + { RESET_REASON_PMU, "PMU" }, + { RESET_REASON_INTERNAL, "INTERNAL" }, + { RESET_REASON_EXTERNAL, "EXTERNAL" }, + {} +}; + +static u32 reset_reason(void) +{ + u32 ret; + int i; + const char *reason = NULL; + + ret = readl(&crlapb_base->reset_reason); + + puts("Reset reason:\t"); + + for (i = 0; i < ARRAY_SIZE(reset_reasons); i++) { + if (ret & reset_reasons[i].bit) { + reason = reset_reasons[i].name; + printf("%s ", reset_reasons[i].name); + break; + } + } + + puts("\n"); + + env_set("reset_reason", reason); + + writel(~0, &crlapb_base->reset_reason); + + return ret; +} + int board_late_init(void) { u32 reg = 0; @@ -593,6 +634,8 @@ int board_late_init(void)

env_set("boot_targets", new_targets);

+ reset_reason(); + return 0; }