ext/libfdt/fdt.c

31 #include <fdt.h>
37 int fdt_check_header(const void *fdt)
39         if (fdt_magic(fdt) == FDT_MAGIC) {
41                 if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
43                 if (fdt_last_comp_version(fdt) > FDT_LAST_SUPPORTED_VERSION)
45         } else if (fdt_magic(fdt) == FDT_SW_MAGIC) {
47                 if (fdt_size_dt_struct(fdt) == 0)
56 const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)
60         if (fdt_version(fdt) >= 0x11)
62                     || ((offset + len) > fdt_size_dt_struct(fdt)))
65         p = _fdt_offset_ptr(fdt, offset);
72 uint32_t fdt_next_tag(const void *fdt, int startoffset, int *nextoffset)
80         tagp = fdt_offset_ptr(fdt, offset, FDT_TAGSIZE);
91                         p = fdt_offset_ptr(fdt, offset++, 1);
98                 lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));
115         if (!fdt_offset_ptr(fdt, startoffset, offset - startoffset))
122 int _fdt_check_node_offset(const void *fdt, int offset)
125             || (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE))
131 int _fdt_check_prop_offset(const void *fdt, int offset)
134             || (fdt_next_tag(fdt, offset, &offset) != FDT_PROP))
140 int fdt_next_node(const void *fdt, int offset, int *depth)
146                 if ((nextoffset = _fdt_check_node_offset(fdt, offset)) < 0)
151                 tag = fdt_next_tag(fdt, offset, &nextoffset);
192 int fdt_move(const void *fdt, void *buf, int bufsize)
194         FDT_CHECK_HEADER(fdt);
196         if (fdt_totalsize(fdt) > bufsize)
199         memmove(buf, fdt, fdt_totalsize(fdt));