1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (C) 2022 Sean Anderson <sean.anderson@seco.com>
9 #if CONFIG_IS_ENABLED(SEMIHOSTING_FALLBACK)
11 * semihosting_enabled() - Determine whether semihosting is supported
13 * Semihosting-based drivers should call this function before making other
16 * Return: %true if a debugger is attached which supports semihosting, %false
19 bool semihosting_enabled(void);
22 * disable_semihosting() - Cause semihosting_enabled() to return false
24 * If U-Boot ever receives an unhandled exception caused by a semihosting trap,
25 * the trap handler should call this function.
27 void disable_semihosting(void);
29 static inline bool semihosting_enabled(void)
31 return CONFIG_IS_ENABLED(SEMIHOSTING);
34 static inline void disable_semihosting(void)
40 * enum smh_open_mode - Numeric file modes for use with smh_open()
47 * These modes represent the mode string used by fopen(3) in a form which can
48 * be passed to smh_open(). These do NOT correspond directly to %O_RDONLY,
49 * %O_CREAT, etc; see fopen(3) for details. In particular, @MODE_PLUS
50 * effectively results in adding %O_RDWR, and @MODE_WRITE will add %O_TRUNC.
51 * For compatibility, @MODE_BINARY should be added when opening non-text files
63 * smh_open() - Open a file on the host
64 * @fname: The name of the file to open
65 * @mode: The mode to use when opening the file
67 * Return: Either a file descriptor or a negative error on failure
69 long smh_open(const char *fname, enum smh_open_mode mode);
72 * smh_read() - Read data from a file
73 * @fd: A file descriptor returned from smh_open()
74 * @memp: Pointer to a buffer of memory of at least @len bytes
75 * @len: The number of bytes to read
78 * * The number of bytes read on success, with 0 indicating %EOF
79 * * A negative error on failure
81 long smh_read(long fd, void *memp, size_t len);
84 * smh_write() - Write data to a file
85 * @fd: A file descriptor returned from smh_open()
86 * @memp: Pointer to a buffer of memory of at least @len bytes
87 * @len: The number of bytes to read
88 * @written: Pointer which will be updated with the actual bytes written
90 * Return: 0 on success or negative error on failure
92 long smh_write(long fd, const void *memp, size_t len, ulong *written);
95 * smh_close() - Close an open file
96 * @fd: A file descriptor returned from smh_open()
98 * Return: 0 on success or negative error on failure
100 long smh_close(long fd);
103 * smh_flen() - Get the length of a file
104 * @fd: A file descriptor returned from smh_open()
106 * Return: The length of the file, in bytes, or a negative error on failure
108 long smh_flen(long fd);
111 * smh_seek() - Seek to a position in a file
112 * @fd: A file descriptor returned from smh_open()
113 * @pos: The offset (in bytes) to seek to
115 * Return: 0 on success or negative error on failure
117 long smh_seek(long fd, long pos);
120 * smh_getc() - Read a character from stdin
122 * Return: The character read, or a negative error on failure
127 * smh_putc() - Print a character on stdout
128 * @ch: The character to print
130 void smh_putc(char ch);
133 * smh_write0() - Print a nul-terminated string on stdout
134 * @s: The string to print
136 void smh_puts(const char *s);
138 #endif /* _SEMIHOSTING_H */