d31c5ab147
Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
/*
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* File: arch/blackfin/kernel/sys_bfin.c
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* Based on:
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* Author:
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*
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* Created:
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* Description: This file contains various random system calls that
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* have a non-standard calling sequence on the Linux/bfin
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* platform.
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*
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* Modified:
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* Copyright 2004-2006 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/smp_lock.h>
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#include <linux/spinlock.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/syscalls.h>
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#include <linux/mman.h>
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/uaccess.h>
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#include <linux/ipc.h>
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#include <linux/unistd.h>
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#include <asm/cacheflush.h>
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#include <asm/dma.h>
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/*
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* sys_pipe() is the normal C calling standard for creating
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* a pipe. It's not the way unix traditionally does this, though.
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*/
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asmlinkage int sys_pipe(unsigned long *fildes)
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{
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int fd[2];
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int error;
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error = do_pipe(fd);
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if (!error) {
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if (copy_to_user(fildes, fd, 2 * sizeof(int)))
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error = -EFAULT;
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}
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return error;
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}
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/* common code for old and new mmaps */
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static inline long
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do_mmap2(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, unsigned long pgoff)
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{
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int error = -EBADF;
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struct file *file = NULL;
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flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
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if (!(flags & MAP_ANONYMOUS)) {
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file = fget(fd);
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if (!file)
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goto out;
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}
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down_write(¤t->mm->mmap_sem);
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error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
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up_write(¤t->mm->mmap_sem);
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if (file)
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fput(file);
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out:
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return error;
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}
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asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, unsigned long pgoff)
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{
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return do_mmap2(addr, len, prot, flags, fd, pgoff);
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}
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asmlinkage int sys_getpagesize(void)
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{
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return PAGE_SIZE;
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}
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asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
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{
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return sram_alloc_with_lsl(size, flags);
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}
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asmlinkage int sys_sram_free(const void *addr)
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{
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return sram_free_with_lsl(addr);
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}
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asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len)
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{
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return safe_dma_memcpy(dest, src, len);
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}
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