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      1 /* $NetBSD: copy.c,v 1.6 2011/12/09 17:24:25 reinoud Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: copy.c,v 1.6 2011/12/09 17:24:25 reinoud Exp $");
     31 
     32 #include <sys/types.h>
     33 #include <sys/systm.h>
     34 #include <machine/thunk.h>
     35 
     36 /* XXX until strnlen(3) has been added to the kernel, we *could* panic on it */
     37 #define strnlen(str, maxlen) min(strlen((str)), maxlen)
     38 
     39 int
     40 copyin(const void *uaddr, void *kaddr, size_t len)
     41 {
     42 //	thunk_printf("copyin uaddr %p, kaddr %p, len %d\n", uaddr, kaddr, (int) len);
     43 	memcpy(kaddr, uaddr, len);
     44 	return 0;
     45 }
     46 
     47 int
     48 copyout(const void *kaddr, void *uaddr, size_t len)
     49 {
     50 //	thunk_printf("copyout kaddr %p, uaddr %p, len %d\n", kaddr, uaddr, (int) len);
     51 	memcpy(uaddr, kaddr, len);
     52 	return 0;
     53 }
     54 
     55 int
     56 copyinstr(const void *uaddr, void *kaddr, size_t len, size_t *done)
     57 {
     58 	len = min(strnlen(uaddr, len), len) + 1;
     59 	strncpy(kaddr, uaddr, len);
     60 	if (done)
     61 		*done = len;
     62 	return 0;
     63 }
     64 
     65 int
     66 copyoutstr(const void *kaddr, void *uaddr, size_t len, size_t *done)
     67 {
     68 	len = min(strnlen(kaddr, len), len) + 1;
     69 	strncpy(uaddr, kaddr, len);
     70 	if (done)
     71 		*done = len;
     72 	return 0;
     73 }
     74 
     75 int
     76 copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done)
     77 {
     78 	len = min(strnlen(kfaddr, len), len) + 1;
     79 	strncpy(kdaddr, kfaddr, len);
     80 	if (done)
     81 		*done = len;
     82 	return 0;
     83 }
     84 
     85 int
     86 kcopy(const void *src, void *dst, size_t len)
     87 {
     88 	memcpy(dst, src, len);
     89 #ifdef DEBUG
     90 	if (memcmp(dst, src, len) != 0)
     91 		panic("kcopy not finished correctly\n");
     92 #endif
     93 	return 0;
     94 }
     95 
     96 int
     97 fuswintr(const void *base)
     98 {
     99 	return *(const short *)base;
    100 }
    101 
    102 int
    103 suswintr(void *base, short c)
    104 {
    105 	*(short *)base = c;
    106 	return 0;
    107 }
    108 
    109 int
    110 subyte(void *base, int c)
    111 {
    112 	*(char *)base = c;
    113 	return 0;
    114 }
    115 
    116 int
    117 suword(void *base, long c)
    118 {
    119 	*(long *)base = c;
    120 	return 0;
    121 }
    122