Initial import from FreeBSD RELENG_4:
[dragonfly.git] / sys / boot / arc / lib / arch / alpha / copy.c
CommitLineData
984263bc
MD
1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/boot/arc/lib/arch/alpha/copy.c,v 1.2 1999/08/28 00:39:40 peter Exp $
27 */
28/*
29 * MD primitives supporting placement of module data
30 *
31 * XXX should check load address/size against memory top.
32 */
33#include <stand.h>
34#include <machine/alpha_cpu.h>
35
36#include "libarc.h"
37
38/*
39 * Convert from a 64bit superpage address to a 32bit arc superpage address.
40 */
41static void *
42convert_superpage(vm_offset_t p)
43{
44 if (p < ALPHA_K0SEG_BASE || p >= ALPHA_K0SEG_END) {
45 printf("stupid address %p\n", (void *)p);
46 panic("broken");
47 }
48 return (void *) (0xffffffff80000000 + (p - ALPHA_K0SEG_BASE));
49}
50
51int
52arc_copyin(void *src, vm_offset_t dest, size_t len)
53{
54 bcopy(src, convert_superpage(dest), len);
55 return(len);
56}
57
58int
59arc_copyout(vm_offset_t src, void *dest, size_t len)
60{
61 bcopy(convert_superpage(src), dest, len);
62 return(len);
63}
64
65int
66arc_readin(int fd, vm_offset_t dest, size_t len)
67{
68 return(read(fd, convert_superpage(dest), len));
69}
70
71