1 /* 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 */ 36 ssize_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 */ 46 ssize_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 */ 55 int 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 */ 63 int 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 */ 73 void os_exit(int exit_code); 74 75 /** 76 * Put tty into raw mode to mimic serial console better 77 */ 78 void os_tty_raw(int fd); 79