xref: /openbmc/qemu/include/semihosting/semihost.h (revision e0c72452)
1 /*
2  * Semihosting support
3  *
4  * Copyright (c) 2015 Imagination Technologies
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #ifndef SEMIHOST_H
21 #define SEMIHOST_H
22 
23 typedef enum SemihostingTarget {
24     SEMIHOSTING_TARGET_AUTO = 0,
25     SEMIHOSTING_TARGET_NATIVE,
26     SEMIHOSTING_TARGET_GDB
27 } SemihostingTarget;
28 
29 #ifdef CONFIG_USER_ONLY
30 static inline bool semihosting_enabled(bool is_user)
31 {
32     return true;
33 }
34 
35 static inline SemihostingTarget semihosting_get_target(void)
36 {
37     return SEMIHOSTING_TARGET_AUTO;
38 }
39 
40 static inline const char *semihosting_get_arg(int i)
41 {
42     return NULL;
43 }
44 
45 static inline int semihosting_get_argc(void)
46 {
47     return 0;
48 }
49 
50 static inline const char *semihosting_get_cmdline(void)
51 {
52     return NULL;
53 }
54 #else /* !CONFIG_USER_ONLY */
55 /**
56  * semihosting_enabled:
57  * @is_user: true if guest code is in usermode (i.e. not privileged)
58  *
59  * Return true if guest code is allowed to make semihosting calls.
60  */
61 bool semihosting_enabled(bool is_user);
62 SemihostingTarget semihosting_get_target(void);
63 const char *semihosting_get_arg(int i);
64 int semihosting_get_argc(void);
65 const char *semihosting_get_cmdline(void);
66 void semihosting_arg_fallback(const char *file, const char *cmd);
67 /* for vl.c hooks */
68 void qemu_semihosting_enable(void);
69 int qemu_semihosting_config_options(const char *optstr);
70 void qemu_semihosting_chardev_init(void);
71 void qemu_semihosting_console_init(Chardev *);
72 #endif /* CONFIG_USER_ONLY */
73 void qemu_semihosting_guestfd_init(void);
74 
75 #endif /* SEMIHOST_H */
76