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);
67 #ifdef CONFIG_CMDLINE_TAG
68 char *commandline = getenv ("bootargs");
71 theKernel = (void (*)(int, int, uint))images->ep;
73 s = getenv ("machid");
75 machid = simple_strtoul (s, NULL, 16);
76 printf ("Using machid 0x%x from environment\n", machid);
79 show_boot_progress (15);
81 debug ("## Transferring control to Linux (at address %08lx) ...\n",
84 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
85 defined (CONFIG_CMDLINE_TAG) || \
86 defined (CONFIG_INITRD_TAG) || \
87 defined (CONFIG_SERIAL_TAG) || \
88 defined (CONFIG_REVISION_TAG) || \
89 defined (CONFIG_LCD) || \
92 #ifdef CONFIG_SERIAL_TAG
93 setup_serial_tag (¶ms);
95 #ifdef CONFIG_REVISION_TAG
96 setup_revision_tag (¶ms);
98 #ifdef CONFIG_SETUP_MEMORY_TAGS
99 setup_memory_tags (bd);
101 #ifdef CONFIG_CMDLINE_TAG
102 setup_commandline_tag (bd, commandline);
104 #ifdef CONFIG_INITRD_TAG
105 if (images->rd_start && images->rd_end)
106 setup_initrd_tag (bd, images->rd_start, images->rd_end);
108 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
109 setup_videolfb_tag ((gd_t *) gd);
114 /* we assume that the kernel is in place */
115 printf ("\nStarting kernel ...\n\n");
117 #ifdef CONFIG_USB_DEVICE
119 extern void udc_disconnect (void);
124 cleanup_before_linux ();
126 theKernel (0, machid, bd->bi_boot_params);
127 /* does not return */
133 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
134 defined (CONFIG_CMDLINE_TAG) || \
135 defined (CONFIG_INITRD_TAG) || \
136 defined (CONFIG_SERIAL_TAG) || \
137 defined (CONFIG_REVISION_TAG) || \
138 defined (CONFIG_LCD) || \
140 static void setup_start_tag (bd_t *bd)
142 params = (struct tag *) bd->bi_boot_params;
144 params->hdr.tag = ATAG_CORE;
145 params->hdr.size = tag_size (tag_core);
147 params->u.core.flags = 0;
148 params->u.core.pagesize = 0;
149 params->u.core.rootdev = 0;
151 params = tag_next (params);
155 #ifdef CONFIG_SETUP_MEMORY_TAGS
156 static void setup_memory_tags (bd_t *bd)
160 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
161 params->hdr.tag = ATAG_MEM;
162 params->hdr.size = tag_size (tag_mem32);
164 params->u.mem.start = bd->bi_dram[i].start;
165 params->u.mem.size = bd->bi_dram[i].size;
167 params = tag_next (params);
170 #endif /* CONFIG_SETUP_MEMORY_TAGS */
173 static void setup_commandline_tag (bd_t *bd, char *commandline)
180 /* eat leading white space */
181 for (p = commandline; *p == ' '; p++);
183 /* skip non-existent command lines so the kernel will still
184 * use its default command line.
189 params->hdr.tag = ATAG_CMDLINE;
191 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
193 strcpy (params->u.cmdline.cmdline, p);
195 params = tag_next (params);
199 #ifdef CONFIG_INITRD_TAG
200 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
202 /* an ATAG_INITRD node tells the kernel where the compressed
203 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
205 params->hdr.tag = ATAG_INITRD2;
206 params->hdr.size = tag_size (tag_initrd);
208 params->u.initrd.start = initrd_start;
209 params->u.initrd.size = initrd_end - initrd_start;
211 params = tag_next (params);
213 #endif /* CONFIG_INITRD_TAG */
216 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
217 extern ulong calc_fbsize (void);
218 static void setup_videolfb_tag (gd_t *gd)
220 /* An ATAG_VIDEOLFB node tells the kernel where and how large
221 * the framebuffer for video was allocated (among other things).
222 * Note that a _physical_ address is passed !
224 * We only use it to pass the address and size, the other entries
225 * in the tag_videolfb are not of interest.
227 params->hdr.tag = ATAG_VIDEOLFB;
228 params->hdr.size = tag_size (tag_videolfb);
230 params->u.videolfb.lfb_base = (u32) gd->fb_base;
231 /* Fb size is calculated according to parameters for our panel
233 params->u.videolfb.lfb_size = calc_fbsize();
235 params = tag_next (params);
237 #endif /* CONFIG_VFD || CONFIG_LCD */
239 #ifdef CONFIG_SERIAL_TAG
240 void setup_serial_tag (struct tag **tmp)
242 struct tag *params = *tmp;
243 struct tag_serialnr serialnr;
244 void get_board_serial(struct tag_serialnr *serialnr);
246 get_board_serial(&serialnr);
247 params->hdr.tag = ATAG_SERIAL;
248 params->hdr.size = tag_size (tag_serialnr);
249 params->u.serialnr.low = serialnr.low;
250 params->u.serialnr.high= serialnr.high;
251 params = tag_next (params);
256 #ifdef CONFIG_REVISION_TAG
257 void setup_revision_tag(struct tag **in_params)
260 u32 get_board_rev(void);
262 rev = get_board_rev();
263 params->hdr.tag = ATAG_REVISION;
264 params->hdr.size = tag_size (tag_revision);
265 params->u.revision.rev = rev;
266 params = tag_next (params);
268 #endif /* CONFIG_REVISION_TAG */
271 static void setup_end_tag (bd_t *bd)
273 params->hdr.tag = ATAG_NONE;
274 params->hdr.size = 0;
277 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */