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
32#include <linux/smp_lock.h>
33#include <linux/spinlock.h>
34#include <linux/sem.h>
35#include <linux/msg.h>
36#include <linux/shm.h>
37#include <linux/syscalls.h>
38#include <linux/mman.h>
39#include <linux/file.h>
40
41#include <asm/cacheflush.h>
42#include <asm/uaccess.h>
43#include <asm/ipc.h>
44#include <asm/dma.h>
45#include <asm/unistd.h>
46
47/*
48 * sys_pipe() is the normal C calling standard for creating
49 * a pipe. It's not the way unix traditionally does this, though.
50 */
51asmlinkage int sys_pipe(unsigned long *fildes)
52{
53	int fd[2];
54	int error;
55
56	error = do_pipe(fd);
57	if (!error) {
58		if (copy_to_user(fildes, fd, 2 * sizeof(int)))
59			error = -EFAULT;
60	}
61	return error;
62}
63
64/* common code for old and new mmaps */
65static inline long
66do_mmap2(unsigned long addr, unsigned long len,
67	 unsigned long prot, unsigned long flags,
68	 unsigned long fd, unsigned long pgoff)
69{
70	int error = -EBADF;
71	struct file *file = NULL;
72
73	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
74	if (!(flags & MAP_ANONYMOUS)) {
75		file = fget(fd);
76		if (!file)
77			goto out;
78	}
79
80	down_write(&current->mm->mmap_sem);
81	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
82	up_write(&current->mm->mmap_sem);
83
84	if (file)
85		fput(file);
86      out:
87	return error;
88}
89
90asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
91			  unsigned long prot, unsigned long flags,
92			  unsigned long fd, unsigned long pgoff)
93{
94	return do_mmap2(addr, len, prot, flags, fd, pgoff);
95}
96
97asmlinkage int sys_getpagesize(void)
98{
99	return PAGE_SIZE;
100}
101
102asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
103{
104	return sram_alloc_with_lsl(size, flags);
105}
106
107asmlinkage int sys_sram_free(const void *addr)
108{
109	return sram_free_with_lsl(addr);
110}
111
112asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len)
113{
114	return safe_dma_memcpy(dest, src, len);
115}
116