exp.h

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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
 */
 
#ifndef ZEPHYR_INCLUDE_ARCH_RISCV_EXP_H_
#define ZEPHYR_INCLUDE_ARCH_RISCV_EXP_H_
 
#ifndef _ASMLANGUAGE
#include <zephyr/types.h>
#include <zephyr/toolchain.h>
 
#ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE
#include <soc_context.h>
#endif
 
#ifdef __cplusplus
extern "C" {
#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
 
#if !defined(RV_FP_TYPE) && defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING)
#ifdef CONFIG_CPU_HAS_FPU_DOUBLE_PRECISION
#define RV_FP_TYPE uint64_t
#else
#define RV_FP_TYPE uint32_t
#endif
#endif
 
struct __esf {
        ulong_t ra;             /* return address */
 
        ulong_t t0;             /* Caller-saved temporary register */
        ulong_t t1;             /* Caller-saved temporary register */
        ulong_t t2;             /* Caller-saved temporary register */
        ulong_t t3;             /* Caller-saved temporary register */
        ulong_t t4;             /* Caller-saved temporary register */
        ulong_t t5;             /* Caller-saved temporary register */
        ulong_t t6;             /* Caller-saved temporary register */
 
        ulong_t a0;             /* function argument/return value */
        ulong_t a1;             /* function argument */
        ulong_t a2;             /* function argument */
        ulong_t a3;             /* function argument */
        ulong_t a4;             /* function argument */
        ulong_t a5;             /* function argument */
        ulong_t a6;             /* function argument */
        ulong_t a7;             /* function argument */
 
        ulong_t mepc;           /* machine exception program counter */
        ulong_t mstatus;        /* machine status register */
 
        ulong_t s0;             /* callee-saved s0 */
 
        ulong_t tp;             /* thread pointer */
#ifdef CONFIG_USERSPACE
        ulong_t sp;             /* preserved (user or kernel) stack pointer */
#endif
 
#if defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING)
        RV_FP_TYPE ft0;         /* Caller-saved temporary floating register */
        RV_FP_TYPE ft1;         /* Caller-saved temporary floating register */
        RV_FP_TYPE ft2;         /* Caller-saved temporary floating register */
        RV_FP_TYPE ft3;         /* Caller-saved temporary floating register */
        RV_FP_TYPE ft4;         /* Caller-saved temporary floating register */
        RV_FP_TYPE ft5;         /* Caller-saved temporary floating register */
        RV_FP_TYPE ft6;         /* Caller-saved temporary floating register */
        RV_FP_TYPE ft7;         /* Caller-saved temporary floating register */
        RV_FP_TYPE ft8;         /* Caller-saved temporary floating register */
        RV_FP_TYPE ft9;         /* Caller-saved temporary floating register */
        RV_FP_TYPE ft10;        /* Caller-saved temporary floating register */
        RV_FP_TYPE ft11;        /* Caller-saved temporary floating register */
        RV_FP_TYPE fa0;         /* function argument/return value */
        RV_FP_TYPE fa1;         /* function argument/return value */
        RV_FP_TYPE fa2;         /* function argument */
        RV_FP_TYPE fa3;         /* function argument */
        RV_FP_TYPE fa4;         /* function argument */
        RV_FP_TYPE fa5;         /* function argument */
        RV_FP_TYPE fa6;         /* function argument */
        RV_FP_TYPE fa7;         /* function argument */
#endif
 
#ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE
        struct soc_esf soc_context;
#endif
} __aligned(16);
 
typedef struct __esf z_arch_esf_t;
#ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE
typedef struct soc_esf soc_esf_t;
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif /* _ASMLANGUAGE */
 
#endif /* ZEPHYR_INCLUDE_ARCH_RISCV_EXP_H_ */