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(¤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 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