Read reset reason reg and show it in log and also save it as variable.
reset_reasons table is setting up priorities for variable.
Signed-off-by: Michal Simek <michal.si...@xilinx.com>
---
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..4d886a914fa9 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_EXTERNAL, "EXTERNAL" },
+ { RESET_REASON_INTERNAL, "INTERNAL" },
+ { RESET_REASON_SOFT, "SOFT" },
+ { RESET_REASON_PSONLY, "PS-ONLY" },
+ { RESET_REASON_SRST, "SRST" },
+ { RESET_REASON_PMU, "PMU" },
+ { RESET_REASON_DEBUG_SYS, "DEBUG" },
+ {}
+};
+
+static u32 reset_reason(bool print)
+{
+ u32 ret;
+ int i;
+ const char *reason = NULL;
+
+ ret = readl(&crlapb_base->reset_reason);
+
+ if (print)
+ puts("Reset reason:\t");
+
+ for (i = 0; i < ARRAY_SIZE(reset_reasons); i++) {
+ if (ret & reset_reasons[i].bit) {
+ reason = reset_reasons[i].name;
+ if (print)
+ printf("%s ", reset_reasons[i].name);
+ }
+ }
+
+ if (print)
+ puts("\n");
+
+ env_set("reset_reason", 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(true);
+
return 0;
}
--
2.17.0
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