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);
60 static struct tag *params;
61 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
63 void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
64 image_header_t *hdr, int verify)
66 ulong initrd_start, initrd_end;
67 void (*theKernel)(int zero, int arch, uint params);
69 int machid = bd->bi_arch_number;
72 #ifdef CONFIG_CMDLINE_TAG
73 char *commandline = getenv ("bootargs");
76 theKernel = (void (*)(int, int, uint))image_get_ep (hdr);
78 s = getenv ("machid");
80 machid = simple_strtoul (s, NULL, 16);
81 printf ("Using machid 0x%x from environment\n", machid);
84 get_ramdisk (cmdtp, flag, argc, argv, hdr, verify,
85 IH_ARCH_ARM, &initrd_start, &initrd_end);
87 show_boot_progress (15);
89 debug ("## Transferring control to Linux (at address %08lx) ...\n",
92 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
93 defined (CONFIG_CMDLINE_TAG) || \
94 defined (CONFIG_INITRD_TAG) || \
95 defined (CONFIG_SERIAL_TAG) || \
96 defined (CONFIG_REVISION_TAG) || \
97 defined (CONFIG_LCD) || \
100 #ifdef CONFIG_SERIAL_TAG
101 setup_serial_tag (¶ms);
103 #ifdef CONFIG_REVISION_TAG
104 setup_revision_tag (¶ms);
106 #ifdef CONFIG_SETUP_MEMORY_TAGS
107 setup_memory_tags (bd);
109 #ifdef CONFIG_CMDLINE_TAG
110 setup_commandline_tag (bd, commandline);
112 #ifdef CONFIG_INITRD_TAG
113 if (initrd_start && initrd_end)
114 setup_initrd_tag (bd, initrd_start, initrd_end);
116 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
117 setup_videolfb_tag ((gd_t *) gd);
122 /* we assume that the kernel is in place */
123 printf ("\nStarting kernel ...\n\n");
125 #ifdef CONFIG_USB_DEVICE
127 extern void udc_disconnect (void);
132 cleanup_before_linux ();
134 theKernel (0, machid, bd->bi_boot_params);
138 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
139 defined (CONFIG_CMDLINE_TAG) || \
140 defined (CONFIG_INITRD_TAG) || \
141 defined (CONFIG_SERIAL_TAG) || \
142 defined (CONFIG_REVISION_TAG) || \
143 defined (CONFIG_LCD) || \
145 static void setup_start_tag (bd_t *bd)
147 params = (struct tag *) bd->bi_boot_params;
149 params->hdr.tag = ATAG_CORE;
150 params->hdr.size = tag_size (tag_core);
152 params->u.core.flags = 0;
153 params->u.core.pagesize = 0;
154 params->u.core.rootdev = 0;
156 params = tag_next (params);
160 #ifdef CONFIG_SETUP_MEMORY_TAGS
161 static void setup_memory_tags (bd_t *bd)
165 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
166 params->hdr.tag = ATAG_MEM;
167 params->hdr.size = tag_size (tag_mem32);
169 params->u.mem.start = bd->bi_dram[i].start;
170 params->u.mem.size = bd->bi_dram[i].size;
172 params = tag_next (params);
175 #endif /* CONFIG_SETUP_MEMORY_TAGS */
178 static void setup_commandline_tag (bd_t *bd, char *commandline)
185 /* eat leading white space */
186 for (p = commandline; *p == ' '; p++);
188 /* skip non-existent command lines so the kernel will still
189 * use its default command line.
194 params->hdr.tag = ATAG_CMDLINE;
196 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
198 strcpy (params->u.cmdline.cmdline, p);
200 params = tag_next (params);
204 #ifdef CONFIG_INITRD_TAG
205 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
207 /* an ATAG_INITRD node tells the kernel where the compressed
208 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
210 params->hdr.tag = ATAG_INITRD2;
211 params->hdr.size = tag_size (tag_initrd);
213 params->u.initrd.start = initrd_start;
214 params->u.initrd.size = initrd_end - initrd_start;
216 params = tag_next (params);
218 #endif /* CONFIG_INITRD_TAG */
221 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
222 extern ulong calc_fbsize (void);
223 static void setup_videolfb_tag (gd_t *gd)
225 /* An ATAG_VIDEOLFB node tells the kernel where and how large
226 * the framebuffer for video was allocated (among other things).
227 * Note that a _physical_ address is passed !
229 * We only use it to pass the address and size, the other entries
230 * in the tag_videolfb are not of interest.
232 params->hdr.tag = ATAG_VIDEOLFB;
233 params->hdr.size = tag_size (tag_videolfb);
235 params->u.videolfb.lfb_base = (u32) gd->fb_base;
236 /* Fb size is calculated according to parameters for our panel
238 params->u.videolfb.lfb_size = calc_fbsize();
240 params = tag_next (params);
242 #endif /* CONFIG_VFD || CONFIG_LCD */
244 #ifdef CONFIG_SERIAL_TAG
245 void setup_serial_tag (struct tag **tmp)
247 struct tag *params = *tmp;
248 struct tag_serialnr serialnr;
249 void get_board_serial(struct tag_serialnr *serialnr);
251 get_board_serial(&serialnr);
252 params->hdr.tag = ATAG_SERIAL;
253 params->hdr.size = tag_size (tag_serialnr);
254 params->u.serialnr.low = serialnr.low;
255 params->u.serialnr.high= serialnr.high;
256 params = tag_next (params);
261 #ifdef CONFIG_REVISION_TAG
262 void setup_revision_tag(struct tag **in_params)
265 u32 get_board_rev(void);
267 rev = get_board_rev();
268 params->hdr.tag = ATAG_REVISION;
269 params->hdr.size = tag_size (tag_revision);
270 params->u.revision.rev = rev;
271 params = tag_next (params);
273 #endif /* CONFIG_REVISION_TAG */
276 static void setup_end_tag (bd_t *bd)
278 params->hdr.tag = ATAG_NONE;
279 params->hdr.size = 0;
282 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */