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 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
63 int machid = bd->bi_arch_number;
64 void (*theKernel)(int zero, int arch, uint params);
66 #ifdef CONFIG_CMDLINE_TAG
67 char *commandline = getenv ("bootargs");
70 if ((flag != 0) || (flag != BOOTM_STATE_OS_GO))
73 theKernel = (void (*)(int, int, uint))images->ep;
75 s = getenv ("machid");
77 machid = simple_strtoul (s, NULL, 16);
78 printf ("Using machid 0x%x from environment\n", machid);
81 show_boot_progress (15);
83 debug ("## Transferring control to Linux (at address %08lx) ...\n",
86 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
87 defined (CONFIG_CMDLINE_TAG) || \
88 defined (CONFIG_INITRD_TAG) || \
89 defined (CONFIG_SERIAL_TAG) || \
90 defined (CONFIG_REVISION_TAG) || \
91 defined (CONFIG_LCD) || \
94 #ifdef CONFIG_SERIAL_TAG
95 setup_serial_tag (¶ms);
97 #ifdef CONFIG_REVISION_TAG
98 setup_revision_tag (¶ms);
100 #ifdef CONFIG_SETUP_MEMORY_TAGS
101 setup_memory_tags (bd);
103 #ifdef CONFIG_CMDLINE_TAG
104 setup_commandline_tag (bd, commandline);
106 #ifdef CONFIG_INITRD_TAG
107 if (images->rd_start && images->rd_end)
108 setup_initrd_tag (bd, images->rd_start, images->rd_end);
110 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
111 setup_videolfb_tag ((gd_t *) gd);
116 /* we assume that the kernel is in place */
117 printf ("\nStarting kernel ...\n\n");
119 #ifdef CONFIG_USB_DEVICE
121 extern void udc_disconnect (void);
126 cleanup_before_linux ();
128 theKernel (0, machid, bd->bi_boot_params);
129 /* does not return */
135 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
136 defined (CONFIG_CMDLINE_TAG) || \
137 defined (CONFIG_INITRD_TAG) || \
138 defined (CONFIG_SERIAL_TAG) || \
139 defined (CONFIG_REVISION_TAG) || \
140 defined (CONFIG_LCD) || \
142 static void setup_start_tag (bd_t *bd)
144 params = (struct tag *) bd->bi_boot_params;
146 params->hdr.tag = ATAG_CORE;
147 params->hdr.size = tag_size (tag_core);
149 params->u.core.flags = 0;
150 params->u.core.pagesize = 0;
151 params->u.core.rootdev = 0;
153 params = tag_next (params);
157 #ifdef CONFIG_SETUP_MEMORY_TAGS
158 static void setup_memory_tags (bd_t *bd)
162 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
163 params->hdr.tag = ATAG_MEM;
164 params->hdr.size = tag_size (tag_mem32);
166 params->u.mem.start = bd->bi_dram[i].start;
167 params->u.mem.size = bd->bi_dram[i].size;
169 params = tag_next (params);
172 #endif /* CONFIG_SETUP_MEMORY_TAGS */
175 static void setup_commandline_tag (bd_t *bd, char *commandline)
182 /* eat leading white space */
183 for (p = commandline; *p == ' '; p++);
185 /* skip non-existent command lines so the kernel will still
186 * use its default command line.
191 params->hdr.tag = ATAG_CMDLINE;
193 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
195 strcpy (params->u.cmdline.cmdline, p);
197 params = tag_next (params);
201 #ifdef CONFIG_INITRD_TAG
202 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
204 /* an ATAG_INITRD node tells the kernel where the compressed
205 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
207 params->hdr.tag = ATAG_INITRD2;
208 params->hdr.size = tag_size (tag_initrd);
210 params->u.initrd.start = initrd_start;
211 params->u.initrd.size = initrd_end - initrd_start;
213 params = tag_next (params);
215 #endif /* CONFIG_INITRD_TAG */
218 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
219 extern ulong calc_fbsize (void);
220 static void setup_videolfb_tag (gd_t *gd)
222 /* An ATAG_VIDEOLFB node tells the kernel where and how large
223 * the framebuffer for video was allocated (among other things).
224 * Note that a _physical_ address is passed !
226 * We only use it to pass the address and size, the other entries
227 * in the tag_videolfb are not of interest.
229 params->hdr.tag = ATAG_VIDEOLFB;
230 params->hdr.size = tag_size (tag_videolfb);
232 params->u.videolfb.lfb_base = (u32) gd->fb_base;
233 /* Fb size is calculated according to parameters for our panel
235 params->u.videolfb.lfb_size = calc_fbsize();
237 params = tag_next (params);
239 #endif /* CONFIG_VFD || CONFIG_LCD */
241 #ifdef CONFIG_SERIAL_TAG
242 void setup_serial_tag (struct tag **tmp)
244 struct tag *params = *tmp;
245 struct tag_serialnr serialnr;
246 void get_board_serial(struct tag_serialnr *serialnr);
248 get_board_serial(&serialnr);
249 params->hdr.tag = ATAG_SERIAL;
250 params->hdr.size = tag_size (tag_serialnr);
251 params->u.serialnr.low = serialnr.low;
252 params->u.serialnr.high= serialnr.high;
253 params = tag_next (params);
258 #ifdef CONFIG_REVISION_TAG
259 void setup_revision_tag(struct tag **in_params)
262 u32 get_board_rev(void);
264 rev = get_board_rev();
265 params->hdr.tag = ATAG_REVISION;
266 params->hdr.size = tag_size (tag_revision);
267 params->u.revision.rev = rev;
268 params = tag_next (params);
270 #endif /* CONFIG_REVISION_TAG */
273 static void setup_end_tag (bd_t *bd)
275 params->hdr.tag = ATAG_NONE;
276 params->hdr.size = 0;
279 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */