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/*
* Copyright (c) 2016 Jean-Paul Etienne <fractalclone@gmail.com>
* Copyright (c) 2018 Foundries.io Ltd
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief RISCV32 public exception handling
*
* RISCV32-specific kernel exception handling interface.
*/
#ifndef ZEPHYR_INCLUDE_ARCH_RISCV32_EXP_H_
#define ZEPHYR_INCLUDE_ARCH_RISCV32_EXP_H_
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _ASMLANGUAGE
#include <zephyr/types.h>
#include <toolchain.h>
#ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE
#include <soc_context.h>
#endif
/*
* The name of the structure which contains soc-specific state, if
* any, as well as the soc_esf_t typedef below, are part of the RISC-V
* arch API.
*
* The contents of the struct are provided by a SOC-specific
* definition in soc_context.h.
*/
#ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE
struct soc_esf {
SOC_ESF_MEMBERS;
};
#endif
struct __esf {
u32_t ra; /* return address */
u32_t gp; /* global pointer */
u32_t tp; /* thread pointer */
u32_t t0; /* Caller-saved temporary register */
u32_t t1; /* Caller-saved temporary register */
u32_t t2; /* Caller-saved temporary register */
u32_t t3; /* Caller-saved temporary register */
u32_t t4; /* Caller-saved temporary register */
u32_t t5; /* Caller-saved temporary register */
u32_t t6; /* Caller-saved temporary register */
u32_t a0; /* function argument/return value */
u32_t a1; /* function argument */
u32_t a2; /* function argument */
u32_t a3; /* function argument */
u32_t a4; /* function argument */
u32_t a5; /* function argument */
u32_t a6; /* function argument */
u32_t a7; /* function argument */
u32_t mepc; /* machine exception program counter */
u32_t mstatus; /* machine status register */
#ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE
struct soc_esf soc_context;
#endif
};
typedef struct __esf NANO_ESF;
#ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE
typedef struct soc_esf soc_esf_t;
#endif
extern const NANO_ESF _default_esf;
extern FUNC_NORETURN void z_NanoFatalErrorHandler(unsigned int reason,
const NANO_ESF *esf);
extern void z_SysFatalErrorHandler(unsigned int reason,
const NANO_ESF *esf);
#endif /* _ASMLANGUAGE */
#define _NANO_ERR_CPU_EXCEPTION (0) /* Any unhandled exception */
#define _NANO_ERR_STACK_CHK_FAIL (2) /* Stack corruption detected */
#define _NANO_ERR_ALLOCATION_FAIL (3) /* Kernel Allocation Failure */
#define _NANO_ERR_SPURIOUS_INT (4) /* Spurious interrupt */
#define _NANO_ERR_KERNEL_OOPS (5) /* Kernel oops (fatal to thread) */
#define _NANO_ERR_KERNEL_PANIC (6) /* Kernel panic (fatal to system) */
#ifdef __cplusplus
}
#endif
#endif /* ZEPHYR_INCLUDE_ARCH_RISCV32_EXP_H_ */