1 /* 2 * Copyright (c) 2016 Jean-Paul Etienne <fractalclone@gmail.com> 3 * Copyright (c) 2018 Foundries.io Ltd 4 * 5 * SPDX-License-Identifier: Apache-2.0 6 */ 7 8 /** 9 * @file 10 * @brief RISCV public exception handling 11 * 12 * RISCV-specific kernel exception handling interface. 13 */ 14 15 #ifndef ZEPHYR_INCLUDE_ARCH_RISCV_EXP_H_ 16 #define ZEPHYR_INCLUDE_ARCH_RISCV_EXP_H_ 17 18 #ifndef _ASMLANGUAGE 19 #include <zephyr/types.h> 20 #include <toolchain.h> 21 22 #ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE 23 #include <soc_context.h> 24 #endif 25 26 #ifdef __cplusplus 27 extern "C" { 28 #endif 29 30 /* 31 * The name of the structure which contains soc-specific state, if 32 * any, as well as the soc_esf_t typedef below, are part of the RISC-V 33 * arch API. 34 * 35 * The contents of the struct are provided by a SOC-specific 36 * definition in soc_context.h. 37 */ 38 #ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE 39 struct soc_esf { 40 SOC_ESF_MEMBERS; 41 }; 42 #endif 43 44 #if !defined(RV_FP_TYPE) && defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING) 45 #ifdef CONFIG_CPU_HAS_FPU_DOUBLE_PRECISION 46 #define RV_FP_TYPE uint64_t 47 #else 48 #define RV_FP_TYPE uint32_t 49 #endif 50 #endif 51 52 struct __esf { 53 ulong_t ra; /* return address */ 54 ulong_t tp; /* thread pointer */ 55 56 ulong_t t0; /* Caller-saved temporary register */ 57 ulong_t t1; /* Caller-saved temporary register */ 58 ulong_t t2; /* Caller-saved temporary register */ 59 ulong_t t3; /* Caller-saved temporary register */ 60 ulong_t t4; /* Caller-saved temporary register */ 61 ulong_t t5; /* Caller-saved temporary register */ 62 ulong_t t6; /* Caller-saved temporary register */ 63 64 ulong_t a0; /* function argument/return value */ 65 ulong_t a1; /* function argument */ 66 ulong_t a2; /* function argument */ 67 ulong_t a3; /* function argument */ 68 ulong_t a4; /* function argument */ 69 ulong_t a5; /* function argument */ 70 ulong_t a6; /* function argument */ 71 ulong_t a7; /* function argument */ 72 73 ulong_t mepc; /* machine exception program counter */ 74 ulong_t mstatus; /* machine status register */ 75 76 #if defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING) 77 ulong_t fp_state; /* Floating-point saved context state. */ 78 RV_FP_TYPE ft0; /* Caller-saved temporary floating register */ 79 RV_FP_TYPE ft1; /* Caller-saved temporary floating register */ 80 RV_FP_TYPE ft2; /* Caller-saved temporary floating register */ 81 RV_FP_TYPE ft3; /* Caller-saved temporary floating register */ 82 RV_FP_TYPE ft4; /* Caller-saved temporary floating register */ 83 RV_FP_TYPE ft5; /* Caller-saved temporary floating register */ 84 RV_FP_TYPE ft6; /* Caller-saved temporary floating register */ 85 RV_FP_TYPE ft7; /* Caller-saved temporary floating register */ 86 RV_FP_TYPE ft8; /* Caller-saved temporary floating register */ 87 RV_FP_TYPE ft9; /* Caller-saved temporary floating register */ 88 RV_FP_TYPE ft10; /* Caller-saved temporary floating register */ 89 RV_FP_TYPE ft11; /* Caller-saved temporary floating register */ 90 RV_FP_TYPE fa0; /* function argument/return value */ 91 RV_FP_TYPE fa1; /* function argument/return value */ 92 RV_FP_TYPE fa2; /* function argument */ 93 RV_FP_TYPE fa3; /* function argument */ 94 RV_FP_TYPE fa4; /* function argument */ 95 RV_FP_TYPE fa5; /* function argument */ 96 RV_FP_TYPE fa6; /* function argument */ 97 RV_FP_TYPE fa7; /* function argument */ 98 #endif 99 100 #ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE 101 struct soc_esf soc_context; 102 #endif 103 }; 104 105 typedef struct __esf z_arch_esf_t; 106 #ifdef CONFIG_RISCV_SOC_CONTEXT_SAVE 107 typedef struct soc_esf soc_esf_t; 108 #endif 109 110 #ifdef __cplusplus 111 } 112 #endif 113 114 #endif /* _ASMLANGUAGE */ 115 116 #endif /* ZEPHYR_INCLUDE_ARCH_RISCV_EXP_H_ */ 117
