[net-next-2.6.git] / arch / blackfin / kernel / sys_bfin.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/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>

/* 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(&current->mm->mmap_sem);
	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
	up_write(&current->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 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);
}
Commit	Line	Data
1394f032 BW	1	/*
	2	* File: arch/blackfin/kernel/sys_bfin.c
	3	* Based on:
	4	* Author:
	5	*
	6	* Created:
	7	* Description: This file contains various random system calls that
	8	* have a non-standard calling sequence on the Linux/bfin
	9	* platform.
	10	*
	11	* Modified:
	12	* Copyright 2004-2006 Analog Devices Inc.
	13	*
	14	* Bugs: Enter bugs at http://blackfin.uclinux.org/
	15	*
	16	* This program is free software; you can redistribute it and/or modify
	17	* it under the terms of the GNU General Public License as published by
	18	* the Free Software Foundation; either version 2 of the License, or
	19	* (at your option) any later version.
	20	*
	21	* This program is distributed in the hope that it will be useful,
	22	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	23	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	24	* GNU General Public License for more details.
	25	*
	26	* You should have received a copy of the GNU General Public License
	27	* along with this program; if not, see the file COPYING, or write
	28	* to the Free Software Foundation, Inc.,
	29	* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	30	*/
	31
1394f032 BW	32	#include <linux/spinlock.h>
	33	#include <linux/sem.h>
	34	#include <linux/msg.h>
	35	#include <linux/shm.h>
	36	#include <linux/syscalls.h>
	37	#include <linux/mman.h>
	38	#include <linux/file.h>
d31c5ab1	39	#include <linux/fs.h>
1f83b8f1 MF	40	#include <linux/uaccess.h>
	41	#include <linux/ipc.h>
	42	#include <linux/unistd.h>
1394f032 BW	43
1394f032 BW	44	#include <asm/cacheflush.h>
1394f032	45	#include <asm/dma.h>
1394f032	46
1394f032 BW	47	/* common code for old and new mmaps */
	48	static inline long
	49	do_mmap2(unsigned long addr, unsigned long len,
	50	unsigned long prot, unsigned long flags,
	51	unsigned long fd, unsigned long pgoff)
	52	{
	53	int error = -EBADF;
	54	struct file *file = NULL;
	55
	56	flags &= ~(MAP_EXECUTABLE \| MAP_DENYWRITE);
	57	if (!(flags & MAP_ANONYMOUS)) {
	58	file = fget(fd);
	59	if (!file)
	60	goto out;
	61	}
	62
	63	down_write(&current->mm->mmap_sem);
	64	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
	65	up_write(&current->mm->mmap_sem);
	66
	67	if (file)
	68	fput(file);
1f83b8f1	69	out:
1394f032 BW	70	return error;
	71	}
	72
	73	asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
	74	unsigned long prot, unsigned long flags,
	75	unsigned long fd, unsigned long pgoff)
	76	{
	77	return do_mmap2(addr, len, prot, flags, fd, pgoff);
	78	}
	79
1394f032 BW	80	asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
	81	{
	82	return sram_alloc_with_lsl(size, flags);
	83	}
	84
	85	asmlinkage int sys_sram_free(const void *addr)
	86	{
	87	return sram_free_with_lsl(addr);
	88	}
	89
	90	asmlinkage void sys_dma_memcpy(void dest, const void *src, size_t len)
	91	{
	92	return safe_dma_memcpy(dest, src, len);
	93	}