Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 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 | */ |
| 51 | asmlinkage 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 */ |
| 65 | static inline long |
| 66 | do_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(¤t->mm->mmap_sem); |
| 81 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); |
| 82 | up_write(¤t->mm->mmap_sem); |
| 83 | |
| 84 | if (file) |
| 85 | fput(file); |
| 86 | out: |
| 87 | return error; |
| 88 | } |
| 89 | |
| 90 | asmlinkage 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 | |
| 97 | asmlinkage int sys_getpagesize(void) |
| 98 | { |
| 99 | return PAGE_SIZE; |
| 100 | } |
| 101 | |
| 102 | asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags) |
| 103 | { |
| 104 | return sram_alloc_with_lsl(size, flags); |
| 105 | } |
| 106 | |
| 107 | asmlinkage int sys_sram_free(const void *addr) |
| 108 | { |
| 109 | return sram_free_with_lsl(addr); |
| 110 | } |
| 111 | |
| 112 | asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len) |
| 113 | { |
| 114 | return safe_dma_memcpy(dest, src, len); |
| 115 | } |