140 const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)  in fdt_offset_ptr()  argument
142 	unsigned int uoffset = offset;  in fdt_offset_ptr()
143 	unsigned int absoffset = offset + fdt_off_dt_struct(fdt);  in fdt_offset_ptr()
145 	if (offset < 0)  in fdt_offset_ptr()
156 		    || ((offset + len) > fdt_size_dt_struct(fdt)))  in fdt_offset_ptr()
159 	return fdt_offset_ptr_(fdt, offset);  in fdt_offset_ptr()
166 	int offset = startoffset;  in fdt_next_tag()  local
170 	tagp = fdt_offset_ptr(fdt, offset, FDT_TAGSIZE);  in fdt_next_tag()
174 	offset += FDT_TAGSIZE;  in fdt_next_tag()
181 			p = fdt_offset_ptr(fdt, offset++, 1);  in fdt_next_tag()
188 		lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));  in fdt_next_tag()
193 		sum = len + offset;  in fdt_next_tag()
195 		    (INT_MAX <= sum || sum < (uint32_t) offset))  in fdt_next_tag()
199 		offset += sizeof(struct fdt_property) - FDT_TAGSIZE + len;  in fdt_next_tag()
203 		    ((offset - len) % 8) != 0)  in fdt_next_tag()
204 			offset += 4;  in fdt_next_tag()
216 	if (!fdt_offset_ptr(fdt, startoffset, offset - startoffset))  in fdt_next_tag()
219 	*nextoffset = FDT_TAGALIGN(offset);  in fdt_next_tag()
223 int fdt_check_node_offset_(const void *fdt, int offset)  in fdt_check_node_offset_()  argument
226 	    && ((offset < 0) || (offset % FDT_TAGSIZE)))  in fdt_check_node_offset_()
229 	if (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE)  in fdt_check_node_offset_()
232 	return offset;  in fdt_check_node_offset_()
235 int fdt_check_prop_offset_(const void *fdt, int offset)  in fdt_check_prop_offset_()  argument
238 	    && ((offset < 0) || (offset % FDT_TAGSIZE)))  in fdt_check_prop_offset_()
241 	if (fdt_next_tag(fdt, offset, &offset) != FDT_PROP)  in fdt_check_prop_offset_()
244 	return offset;  in fdt_check_prop_offset_()
247 int fdt_next_node(const void *fdt, int offset, int *depth)  in fdt_next_node()  argument
252 	if (offset >= 0)  in fdt_next_node()
253 		if ((nextoffset = fdt_check_node_offset_(fdt, offset)) < 0)  in fdt_next_node()
257 		offset = nextoffset;  in fdt_next_node()
258 		tag = fdt_next_tag(fdt, offset, &nextoffset);  in fdt_next_node()
284 	return offset;  in fdt_next_node()
287 int fdt_first_subnode(const void *fdt, int offset)  in fdt_first_subnode()  argument
291 	offset = fdt_next_node(fdt, offset, &depth);  in fdt_first_subnode()
292 	if (offset < 0 || depth != 1)  in fdt_first_subnode()
295 	return offset;  in fdt_first_subnode()
298 int fdt_next_subnode(const void *fdt, int offset)  in fdt_next_subnode()  argument
307 		offset = fdt_next_node(fdt, offset, &depth);  in fdt_next_subnode()
308 		if (offset < 0 || depth < 1)  in fdt_next_subnode()
312 	return offset;  in fdt_next_subnode()