Zephyr Project API 3.7.0
A Scalable Open Source RTOS
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syscall.h
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1/*
2 * Copyright (c) 2019 Carlo Caione <ccaione@baylibre.com>
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
16#ifndef ZEPHYR_INCLUDE_ARCH_ARM64_SYSCALL_H_
17#define ZEPHYR_INCLUDE_ARCH_ARM64_SYSCALL_H_
18
19#define _SVC_CALL_IRQ_OFFLOAD 1
20#define _SVC_CALL_RUNTIME_EXCEPT 2
21#define _SVC_CALL_SYSTEM_CALL 3
22
23#ifdef CONFIG_USERSPACE
24#ifndef _ASMLANGUAGE
25
26#include <zephyr/types.h>
27#include <stdbool.h>
30
31#ifdef __cplusplus
32extern "C" {
33#endif
34
35/*
36 * Syscall invocation macros. arm-specific machine constraints used to ensure
37 * args land in the proper registers.
38 */
40 uintptr_t arg3, uintptr_t arg4,
41 uintptr_t arg5, uintptr_t arg6,
42 uintptr_t call_id)
43{
44 register uint64_t ret __asm__("x0") = arg1;
45 register uint64_t r1 __asm__("x1") = arg2;
46 register uint64_t r2 __asm__("x2") = arg3;
47 register uint64_t r3 __asm__("x3") = arg4;
48 register uint64_t r4 __asm__("x4") = arg5;
49 register uint64_t r5 __asm__("x5") = arg6;
50 register uint64_t r8 __asm__("x8") = call_id;
51
52 __asm__ volatile("svc %[svid]\n"
53 : "=r"(ret)
54 : [svid] "i" (_SVC_CALL_SYSTEM_CALL),
55 "r" (ret), "r" (r1), "r" (r2), "r" (r3),
56 "r" (r4), "r" (r5), "r" (r8)
57 : "memory");
58
59 return ret;
60}
61
63 uintptr_t arg3, uintptr_t arg4,
64 uintptr_t arg5,
65 uintptr_t call_id)
66{
67 register uint64_t ret __asm__("x0") = arg1;
68 register uint64_t r1 __asm__("x1") = arg2;
69 register uint64_t r2 __asm__("x2") = arg3;
70 register uint64_t r3 __asm__("x3") = arg4;
71 register uint64_t r4 __asm__("x4") = arg5;
72 register uint64_t r8 __asm__("x8") = call_id;
73
74 __asm__ volatile("svc %[svid]\n"
75 : "=r"(ret)
76 : [svid] "i" (_SVC_CALL_SYSTEM_CALL),
77 "r" (ret), "r" (r1), "r" (r2), "r" (r3),
78 "r" (r4), "r" (r8)
79 : "memory");
80
81 return ret;
82}
83
85 uintptr_t arg3, uintptr_t arg4,
86 uintptr_t call_id)
87{
88 register uint64_t ret __asm__("x0") = arg1;
89 register uint64_t r1 __asm__("x1") = arg2;
90 register uint64_t r2 __asm__("x2") = arg3;
91 register uint64_t r3 __asm__("x3") = arg4;
92 register uint64_t r8 __asm__("x8") = call_id;
93
94 __asm__ volatile("svc %[svid]\n"
95 : "=r"(ret)
96 : [svid] "i" (_SVC_CALL_SYSTEM_CALL),
97 "r" (ret), "r" (r1), "r" (r2), "r" (r3),
98 "r" (r8)
99 : "memory");
100
101 return ret;
102}
103
105 uintptr_t arg3,
106 uintptr_t call_id)
107{
108 register uint64_t ret __asm__("x0") = arg1;
109 register uint64_t r1 __asm__("x1") = arg2;
110 register uint64_t r2 __asm__("x2") = arg3;
111 register uint64_t r8 __asm__("x8") = call_id;
112
113 __asm__ volatile("svc %[svid]\n"
114 : "=r"(ret)
115 : [svid] "i" (_SVC_CALL_SYSTEM_CALL),
116 "r" (ret), "r" (r1), "r" (r2), "r" (r8)
117 : "memory");
118
119 return ret;
120}
121
123 uintptr_t call_id)
124{
125 register uint64_t ret __asm__("x0") = arg1;
126 register uint64_t r1 __asm__("x1") = arg2;
127 register uint64_t r8 __asm__("x8") = call_id;
128
129 __asm__ volatile("svc %[svid]\n"
130 : "=r"(ret)
131 : [svid] "i" (_SVC_CALL_SYSTEM_CALL),
132 "r" (ret), "r" (r1), "r" (r8)
133 : "memory");
134
135 return ret;
136}
137
139 uintptr_t call_id)
140{
141 register uint64_t ret __asm__("x0") = arg1;
142 register uint64_t r8 __asm__("x8") = call_id;
143
144 __asm__ volatile("svc %[svid]\n"
145 : "=r"(ret)
146 : [svid] "i" (_SVC_CALL_SYSTEM_CALL),
147 "r" (ret), "r" (r8)
148 : "memory");
149 return ret;
150}
151
153{
154 register uint64_t ret __asm__("x0");
155 register uint64_t r8 __asm__("x8") = call_id;
156
157 __asm__ volatile("svc %[svid]\n"
158 : "=r"(ret)
159 : [svid] "i" (_SVC_CALL_SYSTEM_CALL),
160 "r" (ret), "r" (r8)
161 : "memory");
162
163 return ret;
164}
165
166static inline bool arch_is_user_context(void)
167{
168 return (read_tpidrro_el0() & TPIDRROEL0_IN_EL0) != 0;
169}
170
171#ifdef __cplusplus
172}
173#endif
174
175#endif /* _ASMLANGUAGE */
176#endif /* CONFIG_USERSPACE */
177
178#endif /* ZEPHYR_INCLUDE_ARCH_ARM64_SYSCALL_H_ */
static ALWAYS_INLINE uint64_t read_tpidrro_el0(void)
Definition lib_helpers.h:77
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
static uintptr_t arch_syscall_invoke2(uintptr_t arg1, uintptr_t arg2, uintptr_t call_id)
Definition syscall.h:131
static uintptr_t arch_syscall_invoke1(uintptr_t arg1, uintptr_t call_id)
Definition syscall.h:149
static uintptr_t arch_syscall_invoke0(uintptr_t call_id)
Definition syscall.h:165
static bool arch_is_user_context(void)
Definition syscall.h:181
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
static uintptr_t arch_syscall_invoke3(uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t call_id)
Definition syscall.h:111
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
static ZTEST_BMEM int ret
Definition main.c:16
__UINT64_TYPE__ uint64_t
Definition stdint.h:91
__UINTPTR_TYPE__ uintptr_t
Definition stdint.h:105
tpidrro_el0 bits allocation
#define TPIDRROEL0_IN_EL0
Definition tpidrro_el0.h:20