summaryrefslogtreecommitdiff
path: root/libfdt/fdt_wip.c
blob: 2d39aabe1fe9872c2a9e5e441979426244e063fd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/*
 * libfdt - Flat Device Tree manipulation
 * Copyright (C) 2006 David Gibson, IBM Corporation.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */
#include "config.h"
#if CONFIG_OF_LIBFDT

#include "libfdt_env.h"

#include <fdt.h>
#include <libfdt.h>

#include "libfdt_internal.h"

int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
			const void *val, int len)
{
	void *propval;
	int proplen;

	propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
	if (! propval)
		return proplen;

	if (proplen != len)
		return -FDT_ERR_NOSPACE;

	memcpy(propval, val, len);
	return 0;
}

static void nop_region(void *start, int len)
{
	uint32_t *p;

	for (p = start; (void *)p < (start + len); p++)
		*p = cpu_to_fdt32(FDT_NOP);
}

int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
{
	struct fdt_property *prop;
	int len;

	prop = fdt_get_property(fdt, nodeoffset, name, &len);
	if (! prop)
		return len;

	nop_region(prop, len + sizeof(*prop));

	return 0;
}

int _fdt_node_end_offset(void *fdt, int nodeoffset)
{
	int level = 0;
	uint32_t tag;
	int offset, nextoffset;

	tag = fdt_next_tag(fdt, nodeoffset, &nextoffset, NULL);
	if (tag != FDT_BEGIN_NODE)
		return -FDT_ERR_BADOFFSET;
	do {
		offset = nextoffset;
		tag = fdt_next_tag(fdt, offset, &nextoffset, NULL);

		switch (tag) {
		case FDT_END:
			return offset;

		case FDT_BEGIN_NODE:
			level++;
			break;

		case FDT_END_NODE:
			level--;
			break;

		case FDT_PROP:
		case FDT_NOP:
			break;

		default:
			return -FDT_ERR_BADSTRUCTURE;
		}
	} while (level >= 0);

	return nextoffset;
}

int fdt_nop_node(void *fdt, int nodeoffset)
{
	int endoffset;

	endoffset = _fdt_node_end_offset(fdt, nodeoffset);
	if (endoffset < 0)
		return endoffset;

	nop_region(fdt_offset_ptr(fdt, nodeoffset, 0), endoffset - nodeoffset);
	return 0;
}

/*
 * Replace a reserve map entry in the nth slot.
 */
int fdt_replace_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size)
{
	struct fdt_reserve_entry *re;
	int  used;
	int  total;
	int  err;

	err = fdt_num_reservemap(fdt, &used, &total);
	if (err != 0)
		return err;

	if (n >= total)
		return -FDT_ERR_NOSPACE;
	re = (struct fdt_reserve_entry *)
		(fdt + fdt_off_mem_rsvmap(fdt) +
		 (n * sizeof(struct fdt_reserve_entry)));
	re->address = cpu_to_fdt64(addr);
	re->size    = cpu_to_fdt64(size);

	return 0;
}

#endif /* CONFIG_OF_LIBFDT */