include/os.h

   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);