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