copy.c revision 246948 
1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: head/sys/boot/uboot/lib/copy.c 246948 2013-02-18 20:11:20Z kientzle $");
30
31#include <stand.h>
32#include <stdint.h>
33
34#include "api_public.h"
35#include "glue.h"
36
37/*
38 * MD primitives supporting placement of module data
39 */
40
41void *
42uboot_vm_translate(vm_offset_t o) {
43	struct sys_info *si;
44	static uintptr_t start = 0;
45	static size_t size = 0;
46	int i;
47
48	if (size == 0) {
49		if ((si = ub_get_sys_info()) == NULL)
50			panic("could not retrieve system info");
51
52		/* Find start/size of largest DRAM block. */
53		for (i = 0; i < si->mr_no; i++) {
54			if (si->mr[i].flags == MR_ATTR_DRAM
55			    && si->mr[i].size > size) {
56				start = si->mr[i].start;
57				size = si->mr[i].size;
58			}
59		}
60
61		if (size <= 0)
62			panic("No suitable DRAM?\n");
63		/*
64		printf("Loading into memory region 0x%08X-0x%08X (%d MiB)\n",
65		    start, start + size, size / 1024 / 1024);
66		*/
67	}
68	if (o > size)
69		panic("Address offset 0x%08jX bigger than size 0x%08X\n",
70		      (intmax_t)o, size);
71	return (void *)(start + o);
72}
73
74ssize_t
75uboot_copyin(const void *src, vm_offset_t dest, const size_t len)
76{
77	bcopy(src, uboot_vm_translate(dest), len);
78	return (len);
79}
80
81ssize_t
82uboot_copyout(const vm_offset_t src, void *dest, const size_t len)
83{
84	bcopy(uboot_vm_translate(src), dest, len);
85	return (len);
86}
87
88ssize_t
89uboot_readin(const int fd, vm_offset_t dest, const size_t len)
90{
91	return (read(fd, uboot_vm_translate(dest), len));
92}
93