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Annotation of prex-old/sys/arch/arm/arm/cpu.c, Revision 1.1.1.1

1.1       nbrk        1: /*-
                      2:  * Copyright (c) 2005, Kohsuke Ohtani
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. Neither the name of the author nor the names of any co-contributors
                     14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29:
                     30: /*
                     31:  * cpu.c - user memory access code for NOMMU system.
                     32:  */
                     33:
                     34: #include <kernel.h>
                     35: #include <cpu.h>
                     36:
                     37: #ifndef CONFIG_MMU
                     38:
                     39: int
                     40: umem_copyin(void *uaddr, void *kaddr, size_t len)
                     41: {
                     42:        if (user_area(uaddr) && user_area((u_long)uaddr + len)) {
                     43:                memcpy(kaddr, uaddr, len);
                     44:                return 0;
                     45:        }
                     46:        return EFAULT;
                     47: }
                     48:
                     49: int
                     50: umem_copyout(void *kaddr, void *uaddr, size_t len)
                     51: {
                     52:        if (user_area(uaddr) && user_area((u_long)uaddr + len)) {
                     53:                memcpy(uaddr, kaddr, len);
                     54:                return 0;
                     55:        }
                     56:        return EFAULT;
                     57: }
                     58:
                     59: int
                     60: umem_strnlen(const char *uaddr, size_t maxlen, size_t *len)
                     61: {
                     62:        if (user_area(uaddr)) {
                     63:                *len = strnlen(uaddr, maxlen);
                     64:                return 0;
                     65:        }
                     66:        return EFAULT;
                     67: }
                     68: #endif