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 /* 26 * The following structure defines the list of registers that need to be 27 * saved/restored when a context switch occurs. 28 */ 29 struct _callee_saved { 30 unsigned long sp; /* Stack pointer, (x2 register) */ 31 unsigned long ra; /* return address */ 32 33 unsigned long s0; /* saved register/frame pointer */ 34 unsigned long s1; /* saved register */ 35 #if !defined(CONFIG_RISCV_ISA_RV32E) 36 unsigned long s2; /* saved register */ 37 unsigned long s3; /* saved register */ 38 unsigned long s4; /* saved register */ 39 unsigned long s5; /* saved register */ 40 unsigned long s6; /* saved register */ 41 unsigned long s7; /* saved register */ 42 unsigned long s8; /* saved register */ 43 unsigned long s9; /* saved register */ 44 unsigned long s10; /* saved register */ 45 unsigned long s11; /* saved register */ 46 #endif 47 }; 48 typedef struct _callee_saved _callee_saved_t; 49 50 #if !defined(RV_FP_TYPE) 51 #ifdef CONFIG_CPU_HAS_FPU_DOUBLE_PRECISION 52 #define RV_FP_TYPE uint64_t 53 #else 54 #define RV_FP_TYPE uint32_t 55 #endif 56 #endif 57 58 struct z_riscv_fp_context { 59 RV_FP_TYPE fa0, fa1, fa2, fa3, fa4, fa5, fa6, fa7; 60 RV_FP_TYPE ft0, ft1, ft2, ft3, ft4, ft5, ft6, ft7, ft8, ft9, ft10, ft11; 61 RV_FP_TYPE fs0, fs1, fs2, fs3, fs4, fs5, fs6, fs7, fs8, fs9, fs10, fs11; 62 uint32_t fcsr; 63 }; 64 typedef struct z_riscv_fp_context z_riscv_fp_context_t; 65 66 #define PMP_M_MODE_SLOTS 8 /* 8 is plenty enough for m-mode */ 67 68 struct _thread_arch { 69 #ifdef CONFIG_FPU_SHARING 70 struct z_riscv_fp_context saved_fp_context; 71 bool fpu_recently_used; 72 uint8_t exception_depth; 73 #endif 74 #ifdef CONFIG_USERSPACE 75 unsigned long priv_stack_start; 76 unsigned long u_mode_pmpaddr_regs[CONFIG_PMP_SLOTS]; 77 unsigned long u_mode_pmpcfg_regs[CONFIG_PMP_SLOTS / sizeof(unsigned long)]; 78 unsigned int u_mode_pmp_domain_offset; 79 unsigned int u_mode_pmp_end_index; 80 unsigned int u_mode_pmp_update_nr; 81 #endif 82 #ifdef CONFIG_PMP_STACK_GUARD 83 unsigned int m_mode_pmp_end_index; 84 unsigned long m_mode_pmpaddr_regs[PMP_M_MODE_SLOTS]; 85 unsigned long m_mode_pmpcfg_regs[PMP_M_MODE_SLOTS / sizeof(unsigned long)]; 86 #endif 87 }; 88 89 typedef struct _thread_arch _thread_arch_t; 90 91 #endif /* _ASMLANGUAGE */ 92 93 #endif /* ZEPHYR_INCLUDE_ARCH_RISCV_THREAD_H_ */ 94
