Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 | /*
* Copyright (c) 2018 Linaro Limited.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief ARC specific sycall header
*
* This header contains the ARC specific sycall interface. It is
* included by the syscall interface architecture-abstraction header
* (include/arch/syscall.h)
*/
#ifndef ZEPHYR_INCLUDE_ARCH_ARC_SYSCALL_H_
#define ZEPHYR_INCLUDE_ARCH_ARC_SYSCALL_H_
#define _TRAP_S_SCALL_IRQ_OFFLOAD 1
#define _TRAP_S_CALL_RUNTIME_EXCEPT 2
#define _TRAP_S_CALL_SYSTEM_CALL 3
#ifdef CONFIG_USERSPACE
#ifndef _ASMLANGUAGE
#include <zephyr/types.h>
#include <stdbool.h>
#ifdef CONFIG_CPU_ARCV2
#include <arch/arc/v2/aux_regs.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Syscall invocation macros. arc-specific machine constraints used to ensure
* args land in the proper registers. Currently, they are all stub functions
* just for enabling CONFIG_USERSPACE on arc w/o errors.
*/
static inline uintptr_t arch_syscall_invoke6(uintptr_t arg1, uintptr_t arg2,
uintptr_t arg3, uintptr_t arg4,
uintptr_t arg5, uintptr_t arg6,
uintptr_t call_id)
{
register uint32_t ret __asm__("r0") = arg1;
register uint32_t r1 __asm__("r1") = arg2;
register uint32_t r2 __asm__("r2") = arg3;
register uint32_t r3 __asm__("r3") = arg4;
register uint32_t r4 __asm__("r4") = arg5;
register uint32_t r5 __asm__("r5") = arg6;
register uint32_t r6 __asm__("r6") = call_id;
compiler_barrier();
__asm__ volatile(
"trap_s %[trap_s_id]\n"
: "=r"(ret)
: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
"r" (ret), "r" (r1), "r" (r2), "r" (r3),
"r" (r4), "r" (r5), "r" (r6));
return ret;
}
static inline uintptr_t arch_syscall_invoke5(uintptr_t arg1, uintptr_t arg2,
uintptr_t arg3, uintptr_t arg4,
uintptr_t arg5,
uintptr_t call_id)
{
register uint32_t ret __asm__("r0") = arg1;
register uint32_t r1 __asm__("r1") = arg2;
register uint32_t r2 __asm__("r2") = arg3;
register uint32_t r3 __asm__("r3") = arg4;
register uint32_t r4 __asm__("r4") = arg5;
register uint32_t r6 __asm__("r6") = call_id;
compiler_barrier();
__asm__ volatile(
"trap_s %[trap_s_id]\n"
: "=r"(ret)
: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
"r" (ret), "r" (r1), "r" (r2), "r" (r3),
"r" (r4), "r" (r6));
return ret;
}
static inline uintptr_t arch_syscall_invoke4(uintptr_t arg1, uintptr_t arg2,
uintptr_t arg3, uintptr_t arg4,
uintptr_t call_id)
{
register uint32_t ret __asm__("r0") = arg1;
register uint32_t r1 __asm__("r1") = arg2;
register uint32_t r2 __asm__("r2") = arg3;
register uint32_t r3 __asm__("r3") = arg4;
register uint32_t r6 __asm__("r6") = call_id;
compiler_barrier();
__asm__ volatile(
"trap_s %[trap_s_id]\n"
: "=r"(ret)
: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
"r" (ret), "r" (r1), "r" (r2), "r" (r3),
"r" (r6));
return ret;
}
static inline uintptr_t arch_syscall_invoke3(uintptr_t arg1, uintptr_t arg2,
uintptr_t arg3,
uintptr_t call_id)
{
register uint32_t ret __asm__("r0") = arg1;
register uint32_t r1 __asm__("r1") = arg2;
register uint32_t r2 __asm__("r2") = arg3;
register uint32_t r6 __asm__("r6") = call_id;
compiler_barrier();
__asm__ volatile(
"trap_s %[trap_s_id]\n"
: "=r"(ret)
: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
"r" (ret), "r" (r1), "r" (r2), "r" (r6));
return ret;
}
static inline uintptr_t arch_syscall_invoke2(uintptr_t arg1, uintptr_t arg2,
uintptr_t call_id)
{
register uint32_t ret __asm__("r0") = arg1;
register uint32_t r1 __asm__("r1") = arg2;
register uint32_t r6 __asm__("r6") = call_id;
compiler_barrier();
__asm__ volatile(
"trap_s %[trap_s_id]\n"
: "=r"(ret)
: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
"r" (ret), "r" (r1), "r" (r6));
return ret;
}
static inline uintptr_t arch_syscall_invoke1(uintptr_t arg1, uintptr_t call_id)
{
register uint32_t ret __asm__("r0") = arg1;
register uint32_t r6 __asm__("r6") = call_id;
compiler_barrier();
__asm__ volatile(
"trap_s %[trap_s_id]\n"
: "=r"(ret)
: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
"r" (ret), "r" (r6));
return ret;
}
static inline uintptr_t arch_syscall_invoke0(uintptr_t call_id)
{
register uint32_t ret __asm__("r0");
register uint32_t r6 __asm__("r6") = call_id;
compiler_barrier();
__asm__ volatile(
"trap_s %[trap_s_id]\n"
: "=r"(ret)
: [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
"r" (ret), "r" (r6));
return ret;
}
static inline bool arch_is_user_context(void)
{
uint32_t status;
compiler_barrier();
__asm__ volatile("lr %0, [%[status32]]\n"
: "=r"(status)
: [status32] "i" (_ARC_V2_STATUS32));
return !(status & _ARC_V2_STATUS32_US) ? true : false;
}
#ifdef __cplusplus
}
#endif
#endif /* _ASMLANGUAGE */
#endif /* CONFIG_USERSPACE */
#endif /* ZEPHYR_INCLUDE_ARCH_ARC_SYSCALL_H_ */
|