mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 23:24:38 +00:00
d9165153ca
This provides a way for callers to create files for writing. The flags are translated at runtime, for the ones we support. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/*
|
|
* Operating System Interface
|
|
*
|
|
* This provides access to useful OS routines for the sandbox architecture.
|
|
* They are kept in a separate file so we can include system headers.
|
|
*
|
|
* Copyright (c) 2011 The Chromium OS Authors.
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef __OS_H__
|
|
#define __OS_H__
|
|
|
|
/**
|
|
* Access to the OS read() system call
|
|
*
|
|
* \param fd File descriptor as returned by os_open()
|
|
* \param buf Buffer to place data
|
|
* \param count Number of bytes to read
|
|
* \return number of bytes read, or -1 on error
|
|
*/
|
|
ssize_t os_read(int fd, void *buf, size_t count);
|
|
|
|
/**
|
|
* Access to the OS write() system call
|
|
*
|
|
* \param fd File descriptor as returned by os_open()
|
|
* \param buf Buffer containing data to write
|
|
* \param count Number of bytes to write
|
|
* \return number of bytes written, or -1 on error
|
|
*/
|
|
ssize_t os_write(int fd, const void *buf, size_t count);
|
|
|
|
/**
|
|
* Access to the OS lseek() system call
|
|
*
|
|
* \param fd File descriptor as returned by os_open()
|
|
* \param offset File offset (based on whence)
|
|
* \param whence Position offset is relative to (see below)
|
|
* \return new file offset
|
|
*/
|
|
off_t os_lseek(int fd, off_t offset, int whence);
|
|
|
|
/* Defines for "whence" in os_lseek() */
|
|
#define OS_SEEK_SET 0
|
|
#define OS_SEEK_CUR 1
|
|
#define OS_SEEK_END 2
|
|
|
|
/**
|
|
* Access to the OS open() system call
|
|
*
|
|
* \param pathname Pathname of file to open
|
|
* \param flags Flags, like O_RDONLY, O_RDWR
|
|
* \return file descriptor, or -1 on error
|
|
*/
|
|
int os_open(const char *pathname, int flags);
|
|
|
|
#define OS_O_RDONLY 0
|
|
#define OS_O_WRONLY 1
|
|
#define OS_O_RDWR 2
|
|
#define OS_O_MASK 3 /* Mask for read/write flags */
|
|
#define OS_O_CREAT 0100
|
|
|
|
/**
|
|
* Access to the OS close() system call
|
|
*
|
|
* \param fd File descriptor to close
|
|
* \return 0 on success, -1 on error
|
|
*/
|
|
int os_close(int fd);
|
|
|
|
/**
|
|
* Access to the OS exit() system call
|
|
*
|
|
* This exits with the supplied return code, which should be 0 to indicate
|
|
* success.
|
|
*
|
|
* @param exit_code exit code for U-Boot
|
|
*/
|
|
void os_exit(int exit_code);
|
|
|
|
/**
|
|
* Put tty into raw mode to mimic serial console better
|
|
*/
|
|
void os_tty_raw(int fd);
|
|
|
|
/**
|
|
* Acquires some memory from the underlying os.
|
|
*
|
|
* \param length Number of bytes to be allocated
|
|
* \return Pointer to length bytes or NULL on error
|
|
*/
|
|
void *os_malloc(size_t length);
|
|
|
|
/**
|
|
* Access to the usleep function of the os
|
|
*
|
|
* \param usec Time to sleep in micro seconds
|
|
*/
|
|
void os_usleep(unsigned long usec);
|
|
|
|
/**
|
|
* Gets a monotonic increasing number of nano seconds from the OS
|
|
*
|
|
* \return A monotonic increasing time scaled in nano seconds
|
|
*/
|
|
u64 os_get_nsec(void);
|
|
|
|
#endif
|