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);
46 # ifdef CONFIG_INITRD_TAG
47 static void setup_initrd_tag (bd_t *bd, ulong initrd_start,
50 static void setup_end_tag (bd_t *bd);
52 # if defined (CONFIG_VFD) || defined (CONFIG_LCD)
53 static void setup_videolfb_tag (gd_t *gd);
56 static struct tag *params;
57 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
59 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
61 void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
62 bootm_headers_t *images)
66 int machid = bd->bi_arch_number;
67 void (*theKernel)(int zero, int arch, uint params);
70 #ifdef CONFIG_CMDLINE_TAG
71 char *commandline = getenv ("bootargs");
74 theKernel = (void (*)(int, int, uint))images->ep;
76 s = getenv ("machid");
78 machid = simple_strtoul (s, NULL, 16);
79 printf ("Using machid 0x%x from environment\n", machid);
82 show_boot_progress (15);
84 debug ("## Transferring control to Linux (at address %08lx) ...\n",
87 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
88 defined (CONFIG_CMDLINE_TAG) || \
89 defined (CONFIG_INITRD_TAG) || \
90 defined (CONFIG_SERIAL_TAG) || \
91 defined (CONFIG_REVISION_TAG) || \
92 defined (CONFIG_LCD) || \
95 #ifdef CONFIG_SERIAL_TAG
96 setup_serial_tag (¶ms);
98 #ifdef CONFIG_REVISION_TAG
99 setup_revision_tag (¶ms);
101 #ifdef CONFIG_SETUP_MEMORY_TAGS
102 setup_memory_tags (bd);
104 #ifdef CONFIG_CMDLINE_TAG
105 setup_commandline_tag (bd, commandline);
107 #ifdef CONFIG_INITRD_TAG
108 if (images->rd_start && images->rd_end)
109 setup_initrd_tag (bd, images->rd_start, images->rd_end);
111 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
112 setup_videolfb_tag ((gd_t *) gd);
117 /* we assume that the kernel is in place */
118 printf ("\nStarting kernel ...\n\n");
120 #ifdef CONFIG_USB_DEVICE
122 extern void udc_disconnect (void);
127 cleanup_before_linux ();
129 theKernel (0, machid, bd->bi_boot_params);
130 /* does not return */
134 do_reset (cmdtp, flag, argc, argv);
139 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
140 defined (CONFIG_CMDLINE_TAG) || \
141 defined (CONFIG_INITRD_TAG) || \
142 defined (CONFIG_SERIAL_TAG) || \
143 defined (CONFIG_REVISION_TAG) || \
144 defined (CONFIG_LCD) || \
146 static void setup_start_tag (bd_t *bd)
148 params = (struct tag *) bd->bi_boot_params;
150 params->hdr.tag = ATAG_CORE;
151 params->hdr.size = tag_size (tag_core);
153 params->u.core.flags = 0;
154 params->u.core.pagesize = 0;
155 params->u.core.rootdev = 0;
157 params = tag_next (params);
161 #ifdef CONFIG_SETUP_MEMORY_TAGS
162 static void setup_memory_tags (bd_t *bd)
166 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
167 params->hdr.tag = ATAG_MEM;
168 params->hdr.size = tag_size (tag_mem32);
170 params->u.mem.start = bd->bi_dram[i].start;
171 params->u.mem.size = bd->bi_dram[i].size;
173 params = tag_next (params);
176 #endif /* CONFIG_SETUP_MEMORY_TAGS */
179 static void setup_commandline_tag (bd_t *bd, char *commandline)
186 /* eat leading white space */
187 for (p = commandline; *p == ' '; p++);
189 /* skip non-existent command lines so the kernel will still
190 * use its default command line.
195 params->hdr.tag = ATAG_CMDLINE;
197 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
199 strcpy (params->u.cmdline.cmdline, p);
201 params = tag_next (params);
205 #ifdef CONFIG_INITRD_TAG
206 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
208 /* an ATAG_INITRD node tells the kernel where the compressed
209 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
211 params->hdr.tag = ATAG_INITRD2;
212 params->hdr.size = tag_size (tag_initrd);
214 params->u.initrd.start = initrd_start;
215 params->u.initrd.size = initrd_end - initrd_start;
217 params = tag_next (params);
219 #endif /* CONFIG_INITRD_TAG */
222 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
223 extern ulong calc_fbsize (void);
224 static void setup_videolfb_tag (gd_t *gd)
226 /* An ATAG_VIDEOLFB node tells the kernel where and how large
227 * the framebuffer for video was allocated (among other things).
228 * Note that a _physical_ address is passed !
230 * We only use it to pass the address and size, the other entries
231 * in the tag_videolfb are not of interest.
233 params->hdr.tag = ATAG_VIDEOLFB;
234 params->hdr.size = tag_size (tag_videolfb);
236 params->u.videolfb.lfb_base = (u32) gd->fb_base;
237 /* Fb size is calculated according to parameters for our panel
239 params->u.videolfb.lfb_size = calc_fbsize();
241 params = tag_next (params);
243 #endif /* CONFIG_VFD || CONFIG_LCD */
245 #ifdef CONFIG_SERIAL_TAG
246 void setup_serial_tag (struct tag **tmp)
248 struct tag *params = *tmp;
249 struct tag_serialnr serialnr;
250 void get_board_serial(struct tag_serialnr *serialnr);
252 get_board_serial(&serialnr);
253 params->hdr.tag = ATAG_SERIAL;
254 params->hdr.size = tag_size (tag_serialnr);
255 params->u.serialnr.low = serialnr.low;
256 params->u.serialnr.high= serialnr.high;
257 params = tag_next (params);
262 #ifdef CONFIG_REVISION_TAG
263 void setup_revision_tag(struct tag **in_params)
266 u32 get_board_rev(void);
268 rev = get_board_rev();
269 params->hdr.tag = ATAG_REVISION;
270 params->hdr.size = tag_size (tag_revision);
271 params->u.revision.rev = rev;
272 params = tag_next (params);
274 #endif /* CONFIG_REVISION_TAG */
277 static void setup_end_tag (bd_t *bd)
279 params->hdr.tag = ATAG_NONE;
280 params->hdr.size = 0;
283 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */