1 /* ARMv8-M Secure Extensions intrinsics include file.
2
3 Copyright (C) 2015-2021 Free Software Foundation, Inc.
4 Contributed by ARM Ltd.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published
10 by the Free Software Foundation; either version 3, or (at your
11 option) any later version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
17
18 Under Section 7 of GPL version 3, you are granted additional
19 permissions described in the GCC Runtime Library Exception, version
20 3.1, as published by the Free Software Foundation.
21
22 You should have received a copy of the GNU General Public License and
23 a copy of the GCC Runtime Library Exception along with this program;
24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 <http://www.gnu.org/licenses/>. */
26
27
28 #ifndef _GCC_ARM_CMSE_H
29 #define _GCC_ARM_CMSE_H
30
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34
35 #if __ARM_FEATURE_CMSE & 1
36
37 #include <stddef.h>
38
39 #ifdef __ARM_BIG_ENDIAN
40
41 typedef union {
42 struct cmse_address_info {
43 #if __ARM_FEATURE_CMSE & 2
44 unsigned idau_region:8;
45 unsigned idau_region_valid:1;
46 unsigned secure:1;
47 unsigned nonsecure_readwrite_ok:1;
48 unsigned nonsecure_read_ok:1;
49 #else
50 unsigned :12;
51 #endif
52 unsigned readwrite_ok:1;
53 unsigned read_ok:1;
54 #if __ARM_FEATURE_CMSE & 2
55 unsigned sau_region_valid:1;
56 #else
57 unsigned :1;
58 #endif
59 unsigned mpu_region_valid:1;
60 #if __ARM_FEATURE_CMSE & 2
61 unsigned sau_region:8;
62 #else
63 unsigned :8;
64 #endif
65 unsigned mpu_region:8;
66 } flags;
67 unsigned value;
68 } cmse_address_info_t;
69
70 #else
71
72 typedef union {
73 struct cmse_address_info {
74 unsigned mpu_region:8;
75 #if __ARM_FEATURE_CMSE & 2
76 unsigned sau_region:8;
77 #else
78 unsigned :8;
79 #endif
80 unsigned mpu_region_valid:1;
81 #if __ARM_FEATURE_CMSE & 2
82 unsigned sau_region_valid:1;
83 #else
84 unsigned :1;
85 #endif
86 unsigned read_ok:1;
87 unsigned readwrite_ok:1;
88 #if __ARM_FEATURE_CMSE & 2
89 unsigned nonsecure_read_ok:1;
90 unsigned nonsecure_readwrite_ok:1;
91 unsigned secure:1;
92 unsigned idau_region_valid:1;
93 unsigned idau_region:8;
94 #else
95 unsigned :12;
96 #endif
97 } flags;
98 unsigned value;
99 } cmse_address_info_t;
100
101 #endif /* __ARM_BIG_ENDIAN */
102
103 #define cmse_TT_fptr(p) (__cmse_TT_fptr ((__cmse_fptr)(p)))
104
105 typedef void (*__cmse_fptr)(void);
106
107 #define __CMSE_TT_ASM(flags) \
108 { \
109 cmse_address_info_t __result; \
110 __asm__ ("tt" # flags " %0,%1" \
111 : "=r"(__result) \
112 : "r"(__p) \
113 : "memory"); \
114 return __result; \
115 }
116
117 __extension__ static __inline __attribute__ ((__always_inline__))
118 cmse_address_info_t
__cmse_TT_fptr(__cmse_fptr __p)119 __cmse_TT_fptr (__cmse_fptr __p)
120 __CMSE_TT_ASM ()
121
122 __extension__ static __inline __attribute__ ((__always_inline__))
123 cmse_address_info_t
124 cmse_TT (void *__p)
125 __CMSE_TT_ASM ()
126
127 #define cmse_TTT_fptr(p) (__cmse_TTT_fptr ((__cmse_fptr)(p)))
128
129 __extension__ static __inline __attribute__ ((__always_inline__))
130 cmse_address_info_t
131 __cmse_TTT_fptr (__cmse_fptr __p)
132 __CMSE_TT_ASM (t)
133
134 __extension__ static __inline __attribute__ ((__always_inline__))
135 cmse_address_info_t
136 cmse_TTT (void *__p)
137 __CMSE_TT_ASM (t)
138
139 #if __ARM_FEATURE_CMSE & 2
140
141 #define cmse_TTA_fptr(p) (__cmse_TTA_fptr ((__cmse_fptr)(p)))
142
143 __extension__ static __inline __attribute__ ((__always_inline__))
144 cmse_address_info_t
145 __cmse_TTA_fptr (__cmse_fptr __p)
146 __CMSE_TT_ASM (a)
147
148 __extension__ static __inline __attribute__ ((__always_inline__))
149 cmse_address_info_t
150 cmse_TTA (void *__p)
151 __CMSE_TT_ASM (a)
152
153 #define cmse_TTAT_fptr(p) (__cmse_TTAT_fptr ((__cmse_fptr)(p)))
154
155 __extension__ static __inline cmse_address_info_t
156 __attribute__ ((__always_inline__))
157 __cmse_TTAT_fptr (__cmse_fptr __p)
158 __CMSE_TT_ASM (at)
159
160 __extension__ static __inline cmse_address_info_t
161 __attribute__ ((__always_inline__))
162 cmse_TTAT (void *__p)
163 __CMSE_TT_ASM (at)
164
165 /* FIXME: diagnose use outside cmse_nonsecure_entry functions. */
166 __extension__ static __inline int __attribute__ ((__always_inline__))
167 __attribute__ ((warn_unused_result))
168 cmse_nonsecure_caller (void)
169 {
170 return __builtin_arm_cmse_nonsecure_caller ();
171 }
172
173 #define CMSE_AU_NONSECURE 2
174 #define CMSE_MPU_NONSECURE 16
175 #define CMSE_NONSECURE 18
176
177 #define cmse_nsfptr_create(p) ((__typeof__ ((p))) ((__INTPTR_TYPE__) (p) & ~1))
178
179 #define cmse_is_nsfptr(p) (!((__INTPTR_TYPE__) (p) & 1))
180
181 #endif /* __ARM_FEATURE_CMSE & 2 */
182
183 #define CMSE_MPU_UNPRIV 4
184 #define CMSE_MPU_READWRITE 1
185 #define CMSE_MPU_READ 8
186
187 __extension__ void *
188 __attribute__ ((warn_unused_result))
189 cmse_check_address_range (void *, size_t, int);
190
191 #define cmse_check_pointed_object(p, f) \
192 ((__typeof__ ((p))) cmse_check_address_range ((p), sizeof (*(p)), (f)))
193
194 #endif /* __ARM_FEATURE_CMSE & 1 */
195
196 #ifdef __cplusplus
197 }
198 #endif
199
200 #endif /* _GCC_ARM_CMSE_H */
201