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 {
        unsigned long ra;               /* return address */
 
        unsigned long t0;               /* Caller-saved temporary register */
        unsigned long t1;               /* Caller-saved temporary register */
        unsigned long t2;               /* Caller-saved temporary register */
#if !defined(CONFIG_RISCV_ISA_RV32E)
        unsigned long t3;               /* Caller-saved temporary register */
        unsigned long t4;               /* Caller-saved temporary register */
        unsigned long t5;               /* Caller-saved temporary register */
        unsigned long t6;               /* Caller-saved temporary register */
#endif /* !CONFIG_RISCV_ISA_RV32E */
 
        unsigned long a0;               /* function argument/return value */
        unsigned long a1;               /* function argument */
        unsigned long a2;               /* function argument */
        unsigned long a3;               /* function argument */
        unsigned long a4;               /* function argument */
        unsigned long a5;               /* function argument */
#if !defined(CONFIG_RISCV_ISA_RV32E)
        unsigned long a6;               /* function argument */
        unsigned long a7;               /* function argument */
#endif /* !CONFIG_RISCV_ISA_RV32E */
 
        unsigned long mepc;             /* machine exception program counter */
        unsigned long mstatus;  /* machine status register */
 
        unsigned long s0;               /* callee-saved s0 */
 
#ifdef CONFIG_USERSPACE
        unsigned long 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_ */