blob: 3b7606712409ac90d6bef7de6a9f55fba59363f8 [file] [log] [blame]
/*
* Copyright (c) 2017 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief Per-arch thread definition
*
* This file contains definitions for
*
* struct _thread_arch
* struct _callee_saved
*
* necessary to instantiate instances of struct k_thread.
*/
#ifndef ZEPHYR_INCLUDE_ARCH_RISCV_THREAD_H_
#define ZEPHYR_INCLUDE_ARCH_RISCV_THREAD_H_
#ifndef _ASMLANGUAGE
#include <zephyr/types.h>
#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
#ifdef CONFIG_RISCV_PMP
#ifdef CONFIG_64BIT
#define RISCV_PMP_CFG_NUM (CONFIG_PMP_SLOT >> 3)
#else
#define RISCV_PMP_CFG_NUM (CONFIG_PMP_SLOT >> 2)
#endif
#endif
#ifdef CONFIG_PMP_STACK_GUARD
/*
* PMP entries:
* (1 for interrupt stack guard: None)
* 4 for stacks guard: None
* 1 for RAM: RW
* 1 for other address space: RWX
*/
#define PMP_REGION_NUM_FOR_STACK_GUARD 6
#define PMP_CFG_CSR_NUM_FOR_STACK_GUARD 2
#endif /* CONFIG_PMP_STACK_GUARD */
#ifdef CONFIG_PMP_POWER_OF_TWO_ALIGNMENT
#ifdef CONFIG_USERSPACE
#ifdef CONFIG_PMP_STACK_GUARD
/*
* 1 for interrupt stack guard: None
* 1 for core state: R
* 1 for program and read only data: RX
* 1 for user thread stack: RW
*/
#define PMP_REGION_NUM_FOR_U_THREAD 4
#else /* CONFIG_PMP_STACK_GUARD */
/*
* 1 for core state: R
* 1 for program and read only data: RX
* 1 for user thread stack: RW
*/
#define PMP_REGION_NUM_FOR_U_THREAD 3
#endif /* CONFIG_PMP_STACK_GUARD */
#define PMP_MAX_DYNAMIC_REGION (CONFIG_PMP_SLOT - PMP_REGION_NUM_FOR_U_THREAD)
#endif /* CONFIG_USERSPACE */
#else /* CONFIG_PMP_POWER_OF_TWO_ALIGNMENT */
#ifdef CONFIG_USERSPACE
#ifdef CONFIG_PMP_STACK_GUARD
/*
* 1 for interrupt stack guard: None
* 1 for core state: R
* 2 for program and read only data: RX
* 2 for user thread stack: RW
*/
#define PMP_REGION_NUM_FOR_U_THREAD 6
#else /* CONFIG_PMP_STACK_GUARD */
/*
* 1 for core state: R
* 2 for program and read only data: RX
* 2 for user thread stack: RW
*/
#define PMP_REGION_NUM_FOR_U_THREAD 5
#endif /* CONFIG_PMP_STACK_GUARD */
#define PMP_MAX_DYNAMIC_REGION ((CONFIG_PMP_SLOT - \
PMP_REGION_NUM_FOR_U_THREAD) >> 1)
#endif /* CONFIG_USERSPACE */
#endif /* CONFIG_PMP_POWER_OF_TWO_ALIGNMENT */
/*
* The following structure defines the list of registers that need to be
* saved/restored when a cooperative context switch occurs.
*/
struct _callee_saved {
ulong_t sp; /* Stack pointer, (x2 register) */
ulong_t s0; /* saved register/frame pointer */
ulong_t s1; /* saved register */
ulong_t s2; /* saved register */
ulong_t s3; /* saved register */
ulong_t s4; /* saved register */
ulong_t s5; /* saved register */
ulong_t s6; /* saved register */
ulong_t s7; /* saved register */
ulong_t s8; /* saved register */
ulong_t s9; /* saved register */
ulong_t s10; /* saved register */
ulong_t s11; /* saved register */
#if defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING)
uint32_t fcsr; /* Control and status register */
RV_FP_TYPE fs0; /* saved floating-point register */
RV_FP_TYPE fs1; /* saved floating-point register */
RV_FP_TYPE fs2; /* saved floating-point register */
RV_FP_TYPE fs3; /* saved floating-point register */
RV_FP_TYPE fs4; /* saved floating-point register */
RV_FP_TYPE fs5; /* saved floating-point register */
RV_FP_TYPE fs6; /* saved floating-point register */
RV_FP_TYPE fs7; /* saved floating-point register */
RV_FP_TYPE fs8; /* saved floating-point register */
RV_FP_TYPE fs9; /* saved floating-point register */
RV_FP_TYPE fs10; /* saved floating-point register */
RV_FP_TYPE fs11; /* saved floating-point register */
#endif
};
typedef struct _callee_saved _callee_saved_t;
struct _thread_arch {
uint32_t swap_return_value; /* Return value of z_swap() */
#ifdef CONFIG_PMP_STACK_GUARD
ulong_t s_pmpcfg[PMP_CFG_CSR_NUM_FOR_STACK_GUARD];
ulong_t s_pmpaddr[PMP_REGION_NUM_FOR_STACK_GUARD];
#endif
#ifdef CONFIG_USERSPACE
ulong_t priv_stack_start;
ulong_t user_sp;
ulong_t unfinished_syscall;
ulong_t u_pmpcfg[RISCV_PMP_CFG_NUM];
ulong_t u_pmpaddr[CONFIG_PMP_SLOT];
#endif
};
typedef struct _thread_arch _thread_arch_t;
#endif /* _ASMLANGUAGE */
#endif /* ZEPHYR_INCLUDE_ARCH_RISCV_THREAD_H_ */