Zephyr Project API  3.3.0
A Scalable Open Source RTOS
syscall.h
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1/*
2 * Copyright (c) 2018 Linaro Limited.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
16#ifndef ZEPHYR_INCLUDE_ARCH_ARC_SYSCALL_H_
17#define ZEPHYR_INCLUDE_ARCH_ARC_SYSCALL_H_
18
19#define _TRAP_S_CALL_RUNTIME_EXCEPT 2
20#define _TRAP_S_CALL_SYSTEM_CALL 3
21
22#ifdef CONFIG_USERSPACE
23#ifndef _ASMLANGUAGE
24
25#include <zephyr/types.h>
26#include <stdbool.h>
27
28#ifdef CONFIG_ISA_ARCV2
29#include <zephyr/arch/arc/v2/aux_regs.h>
30#endif
31
32#ifdef __cplusplus
33extern "C" {
34#endif
35/* Syscall invocation macros. arc-specific machine constraints used to ensure
36 * args land in the proper registers. Currently, they are all stub functions
37 * just for enabling CONFIG_USERSPACE on arc w/o errors.
38 */
39
40static inline uintptr_t arch_syscall_invoke6(uintptr_t arg1, uintptr_t arg2,
41 uintptr_t arg3, uintptr_t arg4,
42 uintptr_t arg5, uintptr_t arg6,
43 uintptr_t call_id)
44{
45 register uint32_t ret __asm__("r0") = arg1;
46 register uint32_t r1 __asm__("r1") = arg2;
47 register uint32_t r2 __asm__("r2") = arg3;
48 register uint32_t r3 __asm__("r3") = arg4;
49 register uint32_t r4 __asm__("r4") = arg5;
50 register uint32_t r5 __asm__("r5") = arg6;
51 register uint32_t r6 __asm__("r6") = call_id;
52
53 compiler_barrier();
54
55 __asm__ volatile(
56 "trap_s %[trap_s_id]\n"
57 : "=r"(ret)
58 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
59 "r" (ret), "r" (r1), "r" (r2), "r" (r3),
60 "r" (r4), "r" (r5), "r" (r6));
61
62 return ret;
63}
64
65static inline uintptr_t arch_syscall_invoke5(uintptr_t arg1, uintptr_t arg2,
66 uintptr_t arg3, uintptr_t arg4,
67 uintptr_t arg5,
68 uintptr_t call_id)
69{
70 register uint32_t ret __asm__("r0") = arg1;
71 register uint32_t r1 __asm__("r1") = arg2;
72 register uint32_t r2 __asm__("r2") = arg3;
73 register uint32_t r3 __asm__("r3") = arg4;
74 register uint32_t r4 __asm__("r4") = arg5;
75 register uint32_t r6 __asm__("r6") = call_id;
76
77 compiler_barrier();
78
79 __asm__ volatile(
80 "trap_s %[trap_s_id]\n"
81 : "=r"(ret)
82 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
83 "r" (ret), "r" (r1), "r" (r2), "r" (r3),
84 "r" (r4), "r" (r6));
85
86 return ret;
87}
88
89static inline uintptr_t arch_syscall_invoke4(uintptr_t arg1, uintptr_t arg2,
90 uintptr_t arg3, uintptr_t arg4,
91 uintptr_t call_id)
92{
93 register uint32_t ret __asm__("r0") = arg1;
94 register uint32_t r1 __asm__("r1") = arg2;
95 register uint32_t r2 __asm__("r2") = arg3;
96 register uint32_t r3 __asm__("r3") = arg4;
97 register uint32_t r6 __asm__("r6") = call_id;
98
99 compiler_barrier();
100
101 __asm__ volatile(
102 "trap_s %[trap_s_id]\n"
103 : "=r"(ret)
104 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
105 "r" (ret), "r" (r1), "r" (r2), "r" (r3),
106 "r" (r6));
107
108 return ret;
109}
110
111static inline uintptr_t arch_syscall_invoke3(uintptr_t arg1, uintptr_t arg2,
112 uintptr_t arg3,
113 uintptr_t call_id)
114{
115 register uint32_t ret __asm__("r0") = arg1;
116 register uint32_t r1 __asm__("r1") = arg2;
117 register uint32_t r2 __asm__("r2") = arg3;
118 register uint32_t r6 __asm__("r6") = call_id;
119
120 compiler_barrier();
121
122 __asm__ volatile(
123 "trap_s %[trap_s_id]\n"
124 : "=r"(ret)
125 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
126 "r" (ret), "r" (r1), "r" (r2), "r" (r6));
127
128 return ret;
129}
130
131static inline uintptr_t arch_syscall_invoke2(uintptr_t arg1, uintptr_t arg2,
132 uintptr_t call_id)
133{
134 register uint32_t ret __asm__("r0") = arg1;
135 register uint32_t r1 __asm__("r1") = arg2;
136 register uint32_t r6 __asm__("r6") = call_id;
137
138 compiler_barrier();
139
140 __asm__ volatile(
141 "trap_s %[trap_s_id]\n"
142 : "=r"(ret)
143 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
144 "r" (ret), "r" (r1), "r" (r6));
145
146 return ret;
147}
148
149static inline uintptr_t arch_syscall_invoke1(uintptr_t arg1, uintptr_t call_id)
150{
151 register uint32_t ret __asm__("r0") = arg1;
152 register uint32_t r6 __asm__("r6") = call_id;
153
154 compiler_barrier();
155
156 __asm__ volatile(
157 "trap_s %[trap_s_id]\n"
158 : "=r"(ret)
159 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
160 "r" (ret), "r" (r6));
161
162 return ret;
163}
164
165static inline uintptr_t arch_syscall_invoke0(uintptr_t call_id)
166{
167 register uint32_t ret __asm__("r0");
168 register uint32_t r6 __asm__("r6") = call_id;
169
170 compiler_barrier();
171
172 __asm__ volatile(
173 "trap_s %[trap_s_id]\n"
174 : "=r"(ret)
175 : [trap_s_id] "i" (_TRAP_S_CALL_SYSTEM_CALL),
176 "r" (ret), "r" (r6));
177
178 return ret;
179}
180
181static inline bool arch_is_user_context(void)
182{
183 uint32_t status;
184
185 compiler_barrier();
186
187 __asm__ volatile("lr %0, [%[status32]]\n"
188 : "=r"(status)
189 : [status32] "i" (_ARC_V2_STATUS32));
190
191 return !(status & _ARC_V2_STATUS32_US) ? true : false;
192}
193
194#ifdef __cplusplus
195}
196#endif
197
198#endif /* _ASMLANGUAGE */
199#endif /* CONFIG_USERSPACE */
200#endif /* ZEPHYR_INCLUDE_ARCH_ARC_SYSCALL_H_ */
arch_syscall_invoke4
static uintptr_t arch_syscall_invoke4(uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t arg4, uintptr_t call_id)
Definition: syscall.h:89
arch_syscall_invoke2
static uintptr_t arch_syscall_invoke2(uintptr_t arg1, uintptr_t arg2, uintptr_t call_id)
Definition: syscall.h:131
arch_syscall_invoke1
static uintptr_t arch_syscall_invoke1(uintptr_t arg1, uintptr_t call_id)
Definition: syscall.h:149
arch_syscall_invoke0
static uintptr_t arch_syscall_invoke0(uintptr_t call_id)
Definition: syscall.h:165
arch_is_user_context
static bool arch_is_user_context(void)
Definition: syscall.h:181
arch_syscall_invoke5
static uintptr_t arch_syscall_invoke5(uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t arg4, uintptr_t arg5, uintptr_t call_id)
Definition: syscall.h:65
arch_syscall_invoke3
static uintptr_t arch_syscall_invoke3(uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t call_id)
Definition: syscall.h:111
arch_syscall_invoke6
static 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)
Definition: syscall.h:40
aux_regs.h
ARCv2 auxiliary registers definitions.
ret
static ZTEST_BMEM volatile int ret
Definition: k_float_disable.c:28
uint32_t
__UINT32_TYPE__ uint32_t
Definition: stdint.h:90
uintptr_t
__UINTPTR_TYPE__ uintptr_t
Definition: stdint.h:105