tag_list.c revision 157873 
1/******************************************************************************
2 *
3 * Filename: tag_list.c
4 *
5 * Instantiation of basic routines that create linux-boot tag list.
6 *
7 * Revision information:
8 *
9 * 22AUG2004	kb_admin	initial creation
10 *
11 * BEGIN_KBDD_BLOCK
12 * No warranty, expressed or implied, is included with this software.  It is
13 * provided "AS IS" and no warranty of any kind including statutory or aspects
14 * relating to merchantability or fitness for any purpose is provided.  All
15 * intellectual property rights of others is maintained with the respective
16 * owners.  This software is not copyrighted and is intended for reference
17 * only.
18 * END_BLOCK
19 *
20 * $FreeBSD: head/sys/boot/arm/at91/libat91/tag_list.c 157873 2006-04-19 17:16:49Z imp $
21 *****************************************************************************/
22
23/******************************* GLOBALS *************************************/
24
25/********************** PRIVATE FUNCTIONS/DATA/DEFINES ***********************/
26
27#define u32 unsigned
28#define u16 unsigned short
29#define u8  unsigned char
30
31#include "/usr/src/arm/linux/include/asm/setup.h"
32
33#define PAGE_SIZE 	0x1000
34#define MEM_SIZE	0x2000000
35#define PHYS_OFFSET	0x20000000
36
37/*************************** GLOBAL FUNCTIONS ********************************/
38
39/*
40 * .KB_C_FN_DEFINITION_START
41 * void InitTagList(char*, void *)
42 *  This global function populates a linux-boot style tag list from the
43 * string passed in the pointer at the location specified.
44 * .KB_C_FN_DEFINITION_END
45 */
46void InitTagList(char *parms, void *output) {
47
48	char *src, *dst;
49	struct tag *tagList = (struct tag*)output;
50
51	tagList->hdr.size  = tag_size(tag_core);
52	tagList->hdr.tag   = ATAG_CORE;
53	tagList->u.core.flags    = 1;
54	tagList->u.core.pagesize = PAGE_SIZE;
55	tagList->u.core.rootdev  = 0xff;
56	tagList = tag_next(tagList);
57
58	tagList->hdr.size  = tag_size(tag_mem32);
59	tagList->hdr.tag   = ATAG_MEM;
60	tagList->u.mem.size  = MEM_SIZE;
61	tagList->u.mem.start = PHYS_OFFSET;
62	tagList = tag_next(tagList);
63
64	tagList->hdr.size  = tag_size(tag_cmdline);
65	tagList->hdr.tag   = ATAG_CMDLINE;
66
67	src = parms;
68	dst = tagList->u.cmdline.cmdline;
69	while (*src) {
70		*dst++ = *src++;
71	}
72	*dst = 0;
73
74	tagList->hdr.size += ((unsigned)(src - parms) + 1) / sizeof(unsigned);
75	tagList = tag_next(tagList);
76
77	tagList->hdr.size  = 0;
78	tagList->hdr.tag   = ATAG_NONE;
79}
80