1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <boot/tags.h> 30 31 #define DBG(x...) do{}while(0) 32 //#define DBG(x...) dprintf(x) 33 34 void tags_parse(void *_tags, struct tag_handler *handlers, unsigned count) 35 { 36 unsigned n; 37 unsigned *tags = _tags; 38 39 DBG("tags_parse %p\n", tags); 40 41 /* make sure there's a CORE marker first */ 42 if(tags[0] != 2) return; 43 if(tags[1] != 0x54410001) return; 44 45 for(;;) { 46 unsigned size = tags[0]; 47 unsigned type = tags[1]; 48 49 DBG("tags_parse %x %x\n", size, type); 50 51 if(size < 2) break; 52 53 for(n = 0; n < count; n++) { 54 struct tag_handler *h = handlers + n; 55 if((h->type == type) || (h->type == 0)) { 56 h->func(type, (void*) &tags[2], (size - 2) * 4, h->cookie); 57 break; 58 } 59 } 60 61 tags += size; 62 } 63 } 64 65
