117 строки
2.9 KiB
C
117 строки
2.9 KiB
C
/*
|
|
* File: arch/blackfin/kernel/sys_bfin.c
|
|
* Based on:
|
|
* Author:
|
|
*
|
|
* Created:
|
|
* Description: This file contains various random system calls that
|
|
* have a non-standard calling sequence on the Linux/bfin
|
|
* platform.
|
|
*
|
|
* Modified:
|
|
* Copyright 2004-2006 Analog Devices Inc.
|
|
*
|
|
* Bugs: Enter bugs at http://blackfin.uclinux.org/
|
|
*
|
|
* 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, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <linux/smp_lock.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/sem.h>
|
|
#include <linux/msg.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/file.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/ipc.h>
|
|
#include <linux/unistd.h>
|
|
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/dma.h>
|
|
|
|
/*
|
|
* sys_pipe() is the normal C calling standard for creating
|
|
* a pipe. It's not the way unix traditionally does this, though.
|
|
*/
|
|
asmlinkage int sys_pipe(unsigned long *fildes)
|
|
{
|
|
int fd[2];
|
|
int error;
|
|
|
|
error = do_pipe(fd);
|
|
if (!error) {
|
|
if (copy_to_user(fildes, fd, 2 * sizeof(int)))
|
|
error = -EFAULT;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/* common code for old and new mmaps */
|
|
static inline long
|
|
do_mmap2(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long pgoff)
|
|
{
|
|
int error = -EBADF;
|
|
struct file *file = NULL;
|
|
|
|
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
|
if (!(flags & MAP_ANONYMOUS)) {
|
|
file = fget(fd);
|
|
if (!file)
|
|
goto out;
|
|
}
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
|
|
up_write(¤t->mm->mmap_sem);
|
|
|
|
if (file)
|
|
fput(file);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long pgoff)
|
|
{
|
|
return do_mmap2(addr, len, prot, flags, fd, pgoff);
|
|
}
|
|
|
|
asmlinkage int sys_getpagesize(void)
|
|
{
|
|
return PAGE_SIZE;
|
|
}
|
|
|
|
asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
|
|
{
|
|
return sram_alloc_with_lsl(size, flags);
|
|
}
|
|
|
|
asmlinkage int sys_sram_free(const void *addr)
|
|
{
|
|
return sram_free_with_lsl(addr);
|
|
}
|
|
|
|
asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len)
|
|
{
|
|
return safe_dma_memcpy(dest, src, len);
|
|
}
|