1 /* 2 * Copyright (c) 2017 Intel Corporation 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 /** 8 * @file 9 * @brief Per-arch thread definition 10 * 11 * This file contains definitions for 12 * 13 * struct _thread_arch 14 * struct _callee_saved 15 * 16 * necessary to instantiate instances of struct k_thread. 17 */ 18 19 #ifndef ZEPHYR_INCLUDE_ARCH_RISCV_THREAD_H_ 20 #define ZEPHYR_INCLUDE_ARCH_RISCV_THREAD_H_ 21 22 #ifndef _ASMLANGUAGE 23 #include <zephyr/types.h> 24 25 #if !defined(RV_FP_TYPE) && defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING) 26 #ifdef CONFIG_CPU_HAS_FPU_DOUBLE_PRECISION 27 #define RV_FP_TYPE uint64_t 28 #else 29 #define RV_FP_TYPE uint32_t 30 #endif 31 #endif 32 33 #ifdef CONFIG_RISCV_PMP 34 #ifdef CONFIG_64BIT 35 #define RISCV_PMP_CFG_NUM (CONFIG_PMP_SLOT >> 3) 36 #else 37 #define RISCV_PMP_CFG_NUM (CONFIG_PMP_SLOT >> 2) 38 #endif 39 #endif 40 41 #ifdef CONFIG_PMP_STACK_GUARD 42 /* 43 * PMP entries: 44 * (1 for interrupt stack guard: None) 45 * 4 for stacks guard: None 46 * 1 for RAM: RW 47 * 1 for other address space: RWX 48 */ 49 #define PMP_REGION_NUM_FOR_STACK_GUARD 6 50 #define PMP_CFG_CSR_NUM_FOR_STACK_GUARD 2 51 #endif /* CONFIG_PMP_STACK_GUARD */ 52 53 #ifdef CONFIG_PMP_POWER_OF_TWO_ALIGNMENT 54 #ifdef CONFIG_USERSPACE 55 #ifdef CONFIG_PMP_STACK_GUARD 56 /* 57 * 1 for interrupt stack guard: None 58 * 1 for core state: R 59 * 1 for program and read only data: RX 60 * 1 for user thread stack: RW 61 */ 62 #define PMP_REGION_NUM_FOR_U_THREAD 4 63 #else /* CONFIG_PMP_STACK_GUARD */ 64 /* 65 * 1 for core state: R 66 * 1 for program and read only data: RX 67 * 1 for user thread stack: RW 68 */ 69 #define PMP_REGION_NUM_FOR_U_THREAD 3 70 #endif /* CONFIG_PMP_STACK_GUARD */ 71 #define PMP_MAX_DYNAMIC_REGION (CONFIG_PMP_SLOT - PMP_REGION_NUM_FOR_U_THREAD) 72 #endif /* CONFIG_USERSPACE */ 73 74 #else /* CONFIG_PMP_POWER_OF_TWO_ALIGNMENT */ 75 76 #ifdef CONFIG_USERSPACE 77 #ifdef CONFIG_PMP_STACK_GUARD 78 /* 79 * 1 for interrupt stack guard: None 80 * 1 for core state: R 81 * 2 for program and read only data: RX 82 * 2 for user thread stack: RW 83 */ 84 #define PMP_REGION_NUM_FOR_U_THREAD 6 85 #else /* CONFIG_PMP_STACK_GUARD */ 86 /* 87 * 1 for core state: R 88 * 2 for program and read only data: RX 89 * 2 for user thread stack: RW 90 */ 91 #define PMP_REGION_NUM_FOR_U_THREAD 5 92 #endif /* CONFIG_PMP_STACK_GUARD */ 93 #define PMP_MAX_DYNAMIC_REGION ((CONFIG_PMP_SLOT - \ 94 PMP_REGION_NUM_FOR_U_THREAD) >> 1) 95 #endif /* CONFIG_USERSPACE */ 96 #endif /* CONFIG_PMP_POWER_OF_TWO_ALIGNMENT */ 97 98 /* 99 * The following structure defines the list of registers that need to be 100 * saved/restored when a cooperative context switch occurs. 101 */ 102 struct _callee_saved { 103 ulong_t sp; /* Stack pointer, (x2 register) */ 104 105 ulong_t s0; /* saved register/frame pointer */ 106 ulong_t s1; /* saved register */ 107 ulong_t s2; /* saved register */ 108 ulong_t s3; /* saved register */ 109 ulong_t s4; /* saved register */ 110 ulong_t s5; /* saved register */ 111 ulong_t s6; /* saved register */ 112 ulong_t s7; /* saved register */ 113 ulong_t s8; /* saved register */ 114 ulong_t s9; /* saved register */ 115 ulong_t s10; /* saved register */ 116 ulong_t s11; /* saved register */ 117 118 #if defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING) 119 uint32_t fcsr; /* Control and status register */ 120 RV_FP_TYPE fs0; /* saved floating-point register */ 121 RV_FP_TYPE fs1; /* saved floating-point register */ 122 RV_FP_TYPE fs2; /* saved floating-point register */ 123 RV_FP_TYPE fs3; /* saved floating-point register */ 124 RV_FP_TYPE fs4; /* saved floating-point register */ 125 RV_FP_TYPE fs5; /* saved floating-point register */ 126 RV_FP_TYPE fs6; /* saved floating-point register */ 127 RV_FP_TYPE fs7; /* saved floating-point register */ 128 RV_FP_TYPE fs8; /* saved floating-point register */ 129 RV_FP_TYPE fs9; /* saved floating-point register */ 130 RV_FP_TYPE fs10; /* saved floating-point register */ 131 RV_FP_TYPE fs11; /* saved floating-point register */ 132 #endif 133 }; 134 typedef struct _callee_saved _callee_saved_t; 135 136 struct _thread_arch { 137 uint32_t swap_return_value; /* Return value of z_swap() */ 138 139 #ifdef CONFIG_PMP_STACK_GUARD 140 ulong_t s_pmpcfg[PMP_CFG_CSR_NUM_FOR_STACK_GUARD]; 141 ulong_t s_pmpaddr[PMP_REGION_NUM_FOR_STACK_GUARD]; 142 #endif 143 144 #ifdef CONFIG_USERSPACE 145 ulong_t priv_stack_start; 146 ulong_t user_sp; 147 ulong_t unfinished_syscall; 148 ulong_t u_pmpcfg[RISCV_PMP_CFG_NUM]; 149 ulong_t u_pmpaddr[CONFIG_PMP_SLOT]; 150 #endif 151 }; 152 153 typedef struct _thread_arch _thread_arch_t; 154 155 #endif /* _ASMLANGUAGE */ 156 157 #endif /* ZEPHYR_INCLUDE_ARCH_RISCV_THREAD_H_ */ 158
