Zephyr API Documentation  3.6.99
A Scalable Open Source RTOS
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thread.h
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1/*
2 * Copyright (c) 2017 Intel Corporation
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
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 */
29struct _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};
48typedef 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
58struct 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};
64typedef 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
68struct _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
89typedef struct _thread_arch _thread_arch_t;
90
91#endif /* _ASMLANGUAGE */
92
93#endif /* ZEPHYR_INCLUDE_ARCH_RISCV_THREAD_H_ */
#define RV_FP_TYPE
Definition: thread.h:54
#define PMP_M_MODE_SLOTS
Definition: thread.h:66
__UINT32_TYPE__ uint32_t
Definition: stdint.h:90
__UINT8_TYPE__ uint8_t
Definition: stdint.h:88