From: Peng Fan <[email protected]> System Manager provides the last booted and shutdown reasons of the logical machines (LM) and system using the SCMI misc protocol (Protocol ID: 0x84, Message ID: 0xA). This path adds get_reset_reason() to query and print these reasons in SPL and U-Boot.
Signed-off-by: Peng Fan <[email protected]> Signed-off-by: Alice Guo <[email protected]> Reviewed-by: Ye Li <[email protected]> --- arch/arm/include/asm/arch-imx9/sys_proto.h | 1 + arch/arm/mach-imx/imx9/scmi/soc.c | 110 +++++++++++++++++++++++++++++ board/freescale/imx95_evk/spl.c | 3 + include/scmi_nxp_protocols.h | 55 +++++++++++++++ 4 files changed, 169 insertions(+) diff --git a/arch/arm/include/asm/arch-imx9/sys_proto.h b/arch/arm/include/asm/arch-imx9/sys_proto.h index 455aa95339e..dead7a99a66 100644 --- a/arch/arm/include/asm/arch-imx9/sys_proto.h +++ b/arch/arm/include/asm/arch-imx9/sys_proto.h @@ -21,6 +21,7 @@ int m33_prepare(void); int low_drive_freq_update(void *blob); enum imx9_soc_voltage_mode soc_target_voltage_mode(void); +int get_reset_reason(bool sys, bool lm); #define is_voltage_mode(mode) (soc_target_voltage_mode() == (mode)) diff --git a/arch/arm/mach-imx/imx9/scmi/soc.c b/arch/arm/mach-imx/imx9/scmi/soc.c index f973652d0cb..f04b9255cdb 100644 --- a/arch/arm/mach-imx/imx9/scmi/soc.c +++ b/arch/arm/mach-imx/imx9/scmi/soc.c @@ -17,8 +17,10 @@ #include <env_internal.h> #include <fuse.h> #include <imx_thermal.h> +#include <linux/bitfield.h> #include <linux/iopoll.h> #include <scmi_agent.h> +#include <scmi_nxp_protocols.h> DECLARE_GLOBAL_DATA_PTR; @@ -468,6 +470,114 @@ err: printf("%s: fuse read err: %d\n", __func__, ret); } +static char *rst_string[32] = { + "cm33_lockup", + "cm33_swreq", + "cm7_lockup", + "cm7_swreq", + "fccu", + "jtag_sw", + "ele", + "tempsense", + "wdog1", + "wdog2", + "wdog3", + "wdog4", + "wdog5", + "jtag", + "cm33_exc", + "bbm", + "sw", + "sm_err", "fusa_sreco", "pmic", "unused", "unused", "unused", + "unused", "unused", "unused", "unused", "unused", "unused", + "unused", "unused", + "por" +}; + +int get_reset_reason(bool sys, bool lm) +{ + struct scmi_imx_misc_reset_reason_in in = { + .flags = MISC_REASON_FLAG_SYSTEM, + }; + + struct scmi_imx_misc_reset_reason_out out = { 0 }; + struct scmi_msg msg = { + .protocol_id = SCMI_PROTOCOL_ID_IMX_MISC, + .message_id = SCMI_IMX_MISC_RESET_REASON, + .in_msg = (u8 *)&in, + .in_msg_sz = sizeof(in), + .out_msg = (u8 *)&out, + .out_msg_sz = sizeof(out), + }; + int ret; + + struct udevice *dev; + + ret = uclass_get_device_by_name(UCLASS_CLK, "protocol@14", &dev); + if (ret) + return ret; + + if (sys) { + ret = devm_scmi_process_msg(dev, &msg); + if (out.status) { + printf("%s:%d for SYS\n", __func__, out.status); + return ret; + } + + if (out.bootflags & MISC_BOOT_FLAG_VLD) { + printf("SYS Boot reason: %s, origin: %ld, errid: %ld\n", + rst_string[out.bootflags & MISC_BOOT_FLAG_REASON], + out.bootflags & MISC_BOOT_FLAG_ORG_VLD ? + FIELD_GET(MISC_BOOT_FLAG_ORIGIN, out.bootflags) : -1, + out.bootflags & MISC_BOOT_FLAG_ERR_VLD ? + FIELD_GET(MISC_BOOT_FLAG_ERR_ID, out.bootflags) : -1 + ); + } + if (out.shutdownflags & MISC_SHUTDOWN_FLAG_VLD) { + printf("SYS shutdown reason: %s, origin: %ld, errid: %ld\n", + rst_string[out.bootflags & MISC_SHUTDOWN_FLAG_REASON], + out.bootflags & MISC_SHUTDOWN_FLAG_ORG_VLD ? + FIELD_GET(MISC_SHUTDOWN_FLAG_ORIGIN, out.bootflags) : -1, + out.bootflags & MISC_SHUTDOWN_FLAG_ERR_VLD ? + FIELD_GET(MISC_SHUTDOWN_FLAG_ERR_ID, out.bootflags) : -1 + ); + } + } + + if (lm) { + in.flags = 0; + memset(&out, 0, sizeof(struct scmi_imx_misc_reset_reason_out)); + + ret = devm_scmi_process_msg(dev, &msg); + if (out.status) { + printf("%s:%d for LM\n", __func__, out.status); + return ret; + } + + if (out.bootflags & MISC_BOOT_FLAG_VLD) { + printf("LM Boot reason: %s, origin: %ld, errid: %ld\n", + rst_string[out.bootflags & MISC_BOOT_FLAG_REASON], + out.bootflags & MISC_BOOT_FLAG_ORG_VLD ? + FIELD_GET(MISC_BOOT_FLAG_ORIGIN, out.bootflags) : -1, + out.bootflags & MISC_BOOT_FLAG_ERR_VLD ? + FIELD_GET(MISC_BOOT_FLAG_ERR_ID, out.bootflags) : -1 + ); + } + + if (out.shutdownflags & MISC_SHUTDOWN_FLAG_VLD) { + printf("LM shutdown reason: %s, origin: %ld, errid: %ld\n", + rst_string[out.bootflags & MISC_SHUTDOWN_FLAG_REASON], + out.bootflags & MISC_SHUTDOWN_FLAG_ORG_VLD ? + FIELD_GET(MISC_SHUTDOWN_FLAG_ORIGIN, out.bootflags) : -1, + out.bootflags & MISC_SHUTDOWN_FLAG_ERR_VLD ? + FIELD_GET(MISC_SHUTDOWN_FLAG_ERR_ID, out.bootflags) : -1 + ); + } + } + + return 0; +} + const char *get_imx_type(u32 imxtype) { switch (imxtype) { diff --git a/board/freescale/imx95_evk/spl.c b/board/freescale/imx95_evk/spl.c index 08f4da0bb73..3d64097b4c7 100644 --- a/board/freescale/imx95_evk/spl.c +++ b/board/freescale/imx95_evk/spl.c @@ -5,6 +5,7 @@ #include <asm/arch/clock.h> #include <asm/arch/mu.h> +#include <asm/arch/sys_proto.h> #include <asm/mach-imx/boot_mode.h> #include <asm/sections.h> #include <hang.h> @@ -65,5 +66,7 @@ void board_init_f(ulong dummy) debug("SOC: 0x%x\n", gd->arch.soc_rev); debug("LC: 0x%x\n", gd->arch.lifecycle); + get_reset_reason(true, false); + board_init_r(NULL, 0); } diff --git a/include/scmi_nxp_protocols.h b/include/scmi_nxp_protocols.h new file mode 100644 index 00000000000..fe6ecd6a7cf --- /dev/null +++ b/include/scmi_nxp_protocols.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ +/* + * Copyright 2025 NXP + */ + +#ifndef _SCMI_NXP_PROTOCOLS_H +#define _SCMI_NXP_PROTOCOLS_H + +#include <asm/types.h> +#include <linux/bitops.h> + +enum scmi_imx_protocol { + SCMI_IMX_PROTOCOL_ID_MISC = 0x84, +}; + +#define SCMI_PAYLOAD_LEN 100 + +#define SCMI_ARRAY(X, Y) ((SCMI_PAYLOAD_LEN - (X)) / sizeof(Y)) + +#define SCMI_IMX_MISC_RESET_REASON 0xA + +struct scmi_imx_misc_reset_reason_in { +#define MISC_REASON_FLAG_SYSTEM BIT(0) + u32 flags; +}; + +struct scmi_imx_misc_reset_reason_out { + s32 status; + /* Boot reason flags */ +#define MISC_BOOT_FLAG_VLD BIT(31) +#define MISC_BOOT_FLAG_ORG_VLD BIT(28) +#define MISC_BOOT_FLAG_ORIGIN GENMASK(27, 24) +#define MISC_BOOT_FLAG_O_SHIFT 24 +#define MISC_BOOT_FLAG_ERR_VLD BIT(23) +#define MISC_BOOT_FLAG_ERR_ID GENMASK(22, 8) +#define MISC_BOOT_FLAG_E_SHIFT 8 +#define MISC_BOOT_FLAG_REASON GENMASK(7, 0) + u32 bootflags; + /* Shutdown reason flags */ +#define MISC_SHUTDOWN_FLAG_VLD BIT(31) +#define MISC_SHUTDOWN_FLAG_EXT_LEN GENMASK(30, 29) +#define MISC_SHUTDOWN_FLAG_ORG_VLD BIT(28) +#define MISC_SHUTDOWN_FLAG_ORIGIN GENMASK(27, 24) +#define MISC_SHUTDOWN_FLAG_O_SHIFT 24 +#define MISC_SHUTDOWN_FLAG_ERR_VLD BIT(23) +#define MISC_SHUTDOWN_FLAG_ERR_ID GENMASK(22, 8) +#define MISC_SHUTDOWN_FLAG_E_SHIFT 8 +#define MISC_SHUTDOWN_FLAG_REASON GENMASK(7, 0) + u32 shutdownflags; + /* Array of extended info words */ +#define MISC_MAX_EXTINFO SCMI_ARRAY(16, u32) + u32 extInfo[MISC_MAX_EXTINFO]; +}; + +#endif -- 2.43.0
