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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 | |
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(¤t->mm->mmap_sem); | |
64 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
65 | up_write(¤t->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 | } |