blob: f3af4f0e0e46e80ddd24efd98a5e5274b20a8204 [file] [log] [blame]
Simon Glasscd0684f2011-10-03 19:26:44 +00001/*
2 * Copyright (c) 2011 The Chromium OS Authors.
3 * See file CREDITS for list of people who contributed to this
4 * project.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
10 *
11 * This program 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
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
19 * MA 02111-1307 USA
20 */
21
22/*
23 * Operating System Interface
24 *
25 * This provides access to useful OS routines from the sandbox architecture
26 */
27
28/**
29 * Access to the OS read() system call
30 *
31 * \param fd File descriptor as returned by os_open()
32 * \param buf Buffer to place data
33 * \param count Number of bytes to read
34 * \return number of bytes read, or -1 on error
35 */
36ssize_t os_read(int fd, void *buf, size_t count);
37
38/**
39 * Access to the OS write() system call
40 *
41 * \param fd File descriptor as returned by os_open()
42 * \param buf Buffer containing data to write
43 * \param count Number of bytes to write
44 * \return number of bytes written, or -1 on error
45 */
46ssize_t os_write(int fd, const void *buf, size_t count);
47
48/**
49 * Access to the OS open() system call
50 *
51 * \param pathname Pathname of file to open
52 * \param flags Flags, like O_RDONLY, O_RDWR
53 * \return file descriptor, or -1 on error
54 */
55int os_open(const char *pathname, int flags);
56
57/**
58 * Access to the OS close() system call
59 *
60 * \param fd File descriptor to close
61 * \return 0 on success, -1 on error
62 */
63int os_close(int fd);
64
65/**
66 * Access to the OS exit() system call
67 *
68 * This exits with the supplied return code, which should be 0 to indicate
69 * success.
70 *
71 * @param exit_code exit code for U-Boot
72 */
73void os_exit(int exit_code);
Mike Frysingera5baaee2011-10-26 00:21:29 +000074
75/**
76 * Put tty into raw mode to mimic serial console better
77 */
78void os_tty_raw(int fd);
Matthias Weisserb5f7b472011-11-05 11:40:34 +010079
80/**
81 * Acquires some memory from the underlying os.
82 *
83 * \param length Number of bytes to be allocated
84 * \return Pointer to length bytes or NULL on error
85 */
86void *os_malloc(size_t length);
Matthias Weisser0d3dd142011-11-29 12:16:40 +010087
88/**
89 * Access to the usleep function of the os
90 *
91 * \param usec Time to sleep in micro seconds
92 */
93void os_usleep(unsigned long usec);
94
95/**
96 * Gets a monotonic increasing number of nano seconds from the OS
97 *
98 * \return A monotonic increasing time scaled in nano seconds
99 */
100u64 os_get_nsec(void);