/*-
* Copyright (c) 2005, Kohsuke Ohtani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* cpu.c - user memory access code for NOMMU system.
*/
#include <kernel.h>
#include <cpu.h>
#ifndef CONFIG_MMU
int
umem_copyin(void *uaddr, void *kaddr, size_t len)
{
if (user_area(uaddr) && user_area((u_long)uaddr + len)) {
memcpy(kaddr, uaddr, len);
return 0;
}
return EFAULT;
}
int
umem_copyout(void *kaddr, void *uaddr, size_t len)
{
if (user_area(uaddr) && user_area((u_long)uaddr + len)) {
memcpy(uaddr, kaddr, len);
return 0;
}
return EFAULT;
}
int
umem_strnlen(const char *uaddr, size_t maxlen, size_t *len)
{
if (user_area(uaddr)) {
*len = strnlen(uaddr, maxlen);
return 0;
}
return EFAULT;
}
#endif