1*4882a593Smuzhiyun // SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * libfdt - Flat Device Tree manipulation
4*4882a593Smuzhiyun * Copyright (C) 2006 David Gibson, IBM Corporation.
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun #include "libfdt_env.h"
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <fdt.h>
9*4882a593Smuzhiyun #include <libfdt.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include "libfdt_internal.h"
12*4882a593Smuzhiyun
fdt_setprop_inplace_namelen_partial(void * fdt,int nodeoffset,const char * name,int namelen,uint32_t idx,const void * val,int len)13*4882a593Smuzhiyun int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
14*4882a593Smuzhiyun const char *name, int namelen,
15*4882a593Smuzhiyun uint32_t idx, const void *val,
16*4882a593Smuzhiyun int len)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun void *propval;
19*4882a593Smuzhiyun int proplen;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen,
22*4882a593Smuzhiyun &proplen);
23*4882a593Smuzhiyun if (!propval)
24*4882a593Smuzhiyun return proplen;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun if ((unsigned)proplen < (len + idx))
27*4882a593Smuzhiyun return -FDT_ERR_NOSPACE;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun memcpy((char *)propval + idx, val, len);
30*4882a593Smuzhiyun return 0;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
fdt_setprop_inplace(void * fdt,int nodeoffset,const char * name,const void * val,int len)33*4882a593Smuzhiyun int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
34*4882a593Smuzhiyun const void *val, int len)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun const void *propval;
37*4882a593Smuzhiyun int proplen;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
40*4882a593Smuzhiyun if (!propval)
41*4882a593Smuzhiyun return proplen;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun if (proplen != len)
44*4882a593Smuzhiyun return -FDT_ERR_NOSPACE;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return fdt_setprop_inplace_namelen_partial(fdt, nodeoffset, name,
47*4882a593Smuzhiyun strlen(name), 0,
48*4882a593Smuzhiyun val, len);
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
fdt_nop_region_(void * start,int len)51*4882a593Smuzhiyun static void fdt_nop_region_(void *start, int len)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun fdt32_t *p;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun for (p = start; (char *)p < ((char *)start + len); p++)
56*4882a593Smuzhiyun *p = cpu_to_fdt32(FDT_NOP);
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
fdt_nop_property(void * fdt,int nodeoffset,const char * name)59*4882a593Smuzhiyun int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
60*4882a593Smuzhiyun {
61*4882a593Smuzhiyun struct fdt_property *prop;
62*4882a593Smuzhiyun int len;
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
65*4882a593Smuzhiyun if (!prop)
66*4882a593Smuzhiyun return len;
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun fdt_nop_region_(prop, len + sizeof(*prop));
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun return 0;
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun
fdt_node_end_offset_(void * fdt,int offset)73*4882a593Smuzhiyun int fdt_node_end_offset_(void *fdt, int offset)
74*4882a593Smuzhiyun {
75*4882a593Smuzhiyun int depth = 0;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun while ((offset >= 0) && (depth >= 0))
78*4882a593Smuzhiyun offset = fdt_next_node(fdt, offset, &depth);
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun return offset;
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
fdt_nop_node(void * fdt,int nodeoffset)83*4882a593Smuzhiyun int fdt_nop_node(void *fdt, int nodeoffset)
84*4882a593Smuzhiyun {
85*4882a593Smuzhiyun int endoffset;
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun endoffset = fdt_node_end_offset_(fdt, nodeoffset);
88*4882a593Smuzhiyun if (endoffset < 0)
89*4882a593Smuzhiyun return endoffset;
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun fdt_nop_region_(fdt_offset_ptr_w(fdt, nodeoffset, 0),
92*4882a593Smuzhiyun endoffset - nodeoffset);
93*4882a593Smuzhiyun return 0;
94*4882a593Smuzhiyun }
95