3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
6 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 #include <asm/byteorder.h>
30 DECLARE_GLOBAL_DATA_PTR;
32 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
33 defined (CONFIG_CMDLINE_TAG) || \
34 defined (CONFIG_INITRD_TAG) || \
35 defined (CONFIG_SERIAL_TAG) || \
36 defined (CONFIG_REVISION_TAG) || \
37 defined (CONFIG_VFD) || \
39 static void setup_start_tag (bd_t *bd);
41 # ifdef CONFIG_SETUP_MEMORY_TAGS
42 static void setup_memory_tags (bd_t *bd);
44 static void setup_commandline_tag (bd_t *bd, char *commandline);
47 static void setup_ramdisk_tag (bd_t *bd);
49 # ifdef CONFIG_INITRD_TAG
50 static void setup_initrd_tag (bd_t *bd, ulong initrd_start,
53 static void setup_end_tag (bd_t *bd);
55 # if defined (CONFIG_VFD) || defined (CONFIG_LCD)
56 static void setup_videolfb_tag (gd_t *gd);
59 static struct tag *params;
60 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
62 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
64 void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
65 bootm_headers_t *images)
67 ulong initrd_start, initrd_end;
71 int machid = bd->bi_arch_number;
72 void (*theKernel)(int zero, int arch, uint params);
74 #ifdef CONFIG_CMDLINE_TAG
75 char *commandline = getenv ("bootargs");
78 /* find kernel entry point */
79 if (images->legacy_hdr_valid) {
80 ep = image_get_ep (images->legacy_hdr_os);
81 #if defined(CONFIG_FIT)
82 } else if (images->fit_uname_os) {
83 fit_unsupported_reset ("ARM linux bootm");
84 do_reset (cmdtp, flag, argc, argv);
87 puts ("Could not find kernel entry point!\n");
88 do_reset (cmdtp, flag, argc, argv);
90 theKernel = (void (*)(int, int, uint))ep;
92 s = getenv ("machid");
94 machid = simple_strtoul (s, NULL, 16);
95 printf ("Using machid 0x%x from environment\n", machid);
98 get_ramdisk (cmdtp, flag, argc, argv, images,
99 IH_ARCH_ARM, &initrd_start, &initrd_end);
101 show_boot_progress (15);
103 debug ("## Transferring control to Linux (at address %08lx) ...\n",
106 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
107 defined (CONFIG_CMDLINE_TAG) || \
108 defined (CONFIG_INITRD_TAG) || \
109 defined (CONFIG_SERIAL_TAG) || \
110 defined (CONFIG_REVISION_TAG) || \
111 defined (CONFIG_LCD) || \
113 setup_start_tag (bd);
114 #ifdef CONFIG_SERIAL_TAG
115 setup_serial_tag (¶ms);
117 #ifdef CONFIG_REVISION_TAG
118 setup_revision_tag (¶ms);
120 #ifdef CONFIG_SETUP_MEMORY_TAGS
121 setup_memory_tags (bd);
123 #ifdef CONFIG_CMDLINE_TAG
124 setup_commandline_tag (bd, commandline);
126 #ifdef CONFIG_INITRD_TAG
127 if (initrd_start && initrd_end)
128 setup_initrd_tag (bd, initrd_start, initrd_end);
130 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
131 setup_videolfb_tag ((gd_t *) gd);
136 /* we assume that the kernel is in place */
137 printf ("\nStarting kernel ...\n\n");
139 #ifdef CONFIG_USB_DEVICE
141 extern void udc_disconnect (void);
146 cleanup_before_linux ();
148 theKernel (0, machid, bd->bi_boot_params);
152 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
153 defined (CONFIG_CMDLINE_TAG) || \
154 defined (CONFIG_INITRD_TAG) || \
155 defined (CONFIG_SERIAL_TAG) || \
156 defined (CONFIG_REVISION_TAG) || \
157 defined (CONFIG_LCD) || \
159 static void setup_start_tag (bd_t *bd)
161 params = (struct tag *) bd->bi_boot_params;
163 params->hdr.tag = ATAG_CORE;
164 params->hdr.size = tag_size (tag_core);
166 params->u.core.flags = 0;
167 params->u.core.pagesize = 0;
168 params->u.core.rootdev = 0;
170 params = tag_next (params);
174 #ifdef CONFIG_SETUP_MEMORY_TAGS
175 static void setup_memory_tags (bd_t *bd)
179 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
180 params->hdr.tag = ATAG_MEM;
181 params->hdr.size = tag_size (tag_mem32);
183 params->u.mem.start = bd->bi_dram[i].start;
184 params->u.mem.size = bd->bi_dram[i].size;
186 params = tag_next (params);
189 #endif /* CONFIG_SETUP_MEMORY_TAGS */
192 static void setup_commandline_tag (bd_t *bd, char *commandline)
199 /* eat leading white space */
200 for (p = commandline; *p == ' '; p++);
202 /* skip non-existent command lines so the kernel will still
203 * use its default command line.
208 params->hdr.tag = ATAG_CMDLINE;
210 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
212 strcpy (params->u.cmdline.cmdline, p);
214 params = tag_next (params);
218 #ifdef CONFIG_INITRD_TAG
219 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
221 /* an ATAG_INITRD node tells the kernel where the compressed
222 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
224 params->hdr.tag = ATAG_INITRD2;
225 params->hdr.size = tag_size (tag_initrd);
227 params->u.initrd.start = initrd_start;
228 params->u.initrd.size = initrd_end - initrd_start;
230 params = tag_next (params);
232 #endif /* CONFIG_INITRD_TAG */
235 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
236 extern ulong calc_fbsize (void);
237 static void setup_videolfb_tag (gd_t *gd)
239 /* An ATAG_VIDEOLFB node tells the kernel where and how large
240 * the framebuffer for video was allocated (among other things).
241 * Note that a _physical_ address is passed !
243 * We only use it to pass the address and size, the other entries
244 * in the tag_videolfb are not of interest.
246 params->hdr.tag = ATAG_VIDEOLFB;
247 params->hdr.size = tag_size (tag_videolfb);
249 params->u.videolfb.lfb_base = (u32) gd->fb_base;
250 /* Fb size is calculated according to parameters for our panel
252 params->u.videolfb.lfb_size = calc_fbsize();
254 params = tag_next (params);
256 #endif /* CONFIG_VFD || CONFIG_LCD */
258 #ifdef CONFIG_SERIAL_TAG
259 void setup_serial_tag (struct tag **tmp)
261 struct tag *params = *tmp;
262 struct tag_serialnr serialnr;
263 void get_board_serial(struct tag_serialnr *serialnr);
265 get_board_serial(&serialnr);
266 params->hdr.tag = ATAG_SERIAL;
267 params->hdr.size = tag_size (tag_serialnr);
268 params->u.serialnr.low = serialnr.low;
269 params->u.serialnr.high= serialnr.high;
270 params = tag_next (params);
275 #ifdef CONFIG_REVISION_TAG
276 void setup_revision_tag(struct tag **in_params)
279 u32 get_board_rev(void);
281 rev = get_board_rev();
282 params->hdr.tag = ATAG_REVISION;
283 params->hdr.size = tag_size (tag_revision);
284 params->u.revision.rev = rev;
285 params = tag_next (params);
287 #endif /* CONFIG_REVISION_TAG */
290 static void setup_end_tag (bd_t *bd)
292 params->hdr.tag = ATAG_NONE;
293 params->hdr.size = 0;
296 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */