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>
29 #ifdef CONFIG_HAS_DATAFLASH
30 #include <dataflash.h>
34 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
36 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
37 defined (CONFIG_CMDLINE_TAG) || \
38 defined (CONFIG_INITRD_TAG) || \
39 defined (CONFIG_SERIAL_TAG) || \
40 defined (CONFIG_REVISION_TAG) || \
42 static void setup_start_tag (bd_t *bd);
44 # ifdef CONFIG_SETUP_MEMORY_TAGS
45 static void setup_memory_tags (bd_t *bd);
47 static void setup_commandline_tag (bd_t *bd, char *commandline);
50 static void setup_ramdisk_tag (bd_t *bd);
52 # ifdef CONFIG_INITRD_TAG
53 static void setup_initrd_tag (bd_t *bd, ulong initrd_start,
56 static void setup_end_tag (bd_t *bd);
58 # if defined (CONFIG_VFD)
59 static void setup_videolfb_tag (gd_t *gd);
63 static struct tag *params;
64 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
66 #ifdef CONFIG_SHOW_BOOT_PROGRESS
67 # include <status_led.h>
68 # define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
70 # define SHOW_BOOT_PROGRESS(arg)
73 extern image_header_t header; /* from cmd_bootm.c */
76 void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
77 ulong addr, ulong *len_ptr, int verify)
79 DECLARE_GLOBAL_DATA_PTR;
81 ulong len = 0, checksum;
82 ulong initrd_start, initrd_end;
84 void (*theKernel)(int zero, int arch, uint params);
85 image_header_t *hdr = &header;
88 #ifdef CONFIG_CMDLINE_TAG
89 char *commandline = getenv ("bootargs");
92 theKernel = (void (*)(int, int, uint))ntohl(hdr->ih_ep);
95 * Check if there is an initrd image
98 SHOW_BOOT_PROGRESS (9);
100 addr = simple_strtoul (argv[2], NULL, 16);
102 printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
104 /* Copy header so we can blank CRC field for re-calculation */
105 #ifdef CONFIG_HAS_DATAFLASH
106 if (addr_dataflash (addr)) {
107 read_dataflash (addr, sizeof (image_header_t),
111 memcpy (&header, (char *) addr,
112 sizeof (image_header_t));
114 if (ntohl (hdr->ih_magic) != IH_MAGIC) {
115 printf ("Bad Magic Number\n");
116 SHOW_BOOT_PROGRESS (-10);
117 do_reset (cmdtp, flag, argc, argv);
120 data = (ulong) & header;
121 len = sizeof (image_header_t);
123 checksum = ntohl (hdr->ih_hcrc);
126 if (crc32 (0, (char *) data, len) != checksum) {
127 printf ("Bad Header Checksum\n");
128 SHOW_BOOT_PROGRESS (-11);
129 do_reset (cmdtp, flag, argc, argv);
132 SHOW_BOOT_PROGRESS (10);
134 print_image_hdr (hdr);
136 data = addr + sizeof (image_header_t);
137 len = ntohl (hdr->ih_size);
139 #ifdef CONFIG_HAS_DATAFLASH
140 if (addr_dataflash (addr)) {
141 read_dataflash (data, len, (char *) CFG_LOAD_ADDR);
142 data = CFG_LOAD_ADDR;
149 printf (" Verifying Checksum ... ");
150 csum = crc32 (0, (char *) data, len);
151 if (csum != ntohl (hdr->ih_dcrc)) {
152 printf ("Bad Data CRC\n");
153 SHOW_BOOT_PROGRESS (-12);
154 do_reset (cmdtp, flag, argc, argv);
159 SHOW_BOOT_PROGRESS (11);
161 if ((hdr->ih_os != IH_OS_LINUX) ||
162 (hdr->ih_arch != IH_CPU_ARM) ||
163 (hdr->ih_type != IH_TYPE_RAMDISK)) {
164 printf ("No Linux ARM Ramdisk Image\n");
165 SHOW_BOOT_PROGRESS (-13);
166 do_reset (cmdtp, flag, argc, argv);
170 * Now check if we have a multifile image
172 } else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
173 ulong tail = ntohl (len_ptr[0]) % 4;
176 SHOW_BOOT_PROGRESS (13);
178 /* skip kernel length and terminator */
179 data = (ulong) (&len_ptr[2]);
180 /* skip any additional image length fields */
181 for (i = 1; len_ptr[i]; ++i)
183 /* add kernel length, and align */
184 data += ntohl (len_ptr[0]);
189 len = ntohl (len_ptr[1]);
195 SHOW_BOOT_PROGRESS (14);
202 printf ("No initrd\n");
208 initrd_end = initrd_start + len;
214 SHOW_BOOT_PROGRESS (15);
216 debug ("## Transferring control to Linux (at address %08lx) ...\n",
219 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
220 defined (CONFIG_CMDLINE_TAG) || \
221 defined (CONFIG_INITRD_TAG) || \
222 defined (CONFIG_SERIAL_TAG) || \
223 defined (CONFIG_REVISION_TAG) || \
225 setup_start_tag (bd);
226 #ifdef CONFIG_SERIAL_TAG
227 setup_serial_tag (¶ms);
229 #ifdef CONFIG_REVISION_TAG
230 setup_revision_tag (¶ms);
232 #ifdef CONFIG_SETUP_MEMORY_TAGS
233 setup_memory_tags (bd);
235 #ifdef CONFIG_CMDLINE_TAG
236 setup_commandline_tag (bd, commandline);
238 #ifdef CONFIG_INITRD_TAG
239 if (initrd_start && initrd_end)
240 setup_initrd_tag (bd, initrd_start, initrd_end);
242 #if defined (CONFIG_VFD)
243 setup_videolfb_tag ((gd_t *) gd);
248 /* we assume that the kernel is in place */
249 printf ("\nStarting kernel ...\n\n");
251 cleanup_before_linux ();
253 theKernel (0, bd->bi_arch_number, bd->bi_boot_params);
257 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
258 defined (CONFIG_CMDLINE_TAG) || \
259 defined (CONFIG_INITRD_TAG) || \
260 defined (CONFIG_SERIAL_TAG) || \
261 defined (CONFIG_REVISION_TAG) || \
263 static void setup_start_tag (bd_t *bd)
265 params = (struct tag *) bd->bi_boot_params;
267 params->hdr.tag = ATAG_CORE;
268 params->hdr.size = tag_size (tag_core);
270 params->u.core.flags = 0;
271 params->u.core.pagesize = 0;
272 params->u.core.rootdev = 0;
274 params = tag_next (params);
278 #ifdef CONFIG_SETUP_MEMORY_TAGS
279 static void setup_memory_tags (bd_t *bd)
283 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
284 params->hdr.tag = ATAG_MEM;
285 params->hdr.size = tag_size (tag_mem32);
287 params->u.mem.start = bd->bi_dram[i].start;
288 params->u.mem.size = bd->bi_dram[i].size;
290 params = tag_next (params);
293 #endif /* CONFIG_SETUP_MEMORY_TAGS */
296 static void setup_commandline_tag (bd_t *bd, char *commandline)
300 /* eat leading white space */
301 for (p = commandline; *p == ' '; p++);
303 /* skip non-existent command lines so the kernel will still
304 * use its default command line.
309 params->hdr.tag = ATAG_CMDLINE;
311 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
313 strcpy (params->u.cmdline.cmdline, p);
315 params = tag_next (params);
319 #ifdef CONFIG_INITRD_TAG
320 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
322 /* an ATAG_INITRD node tells the kernel where the compressed
323 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
325 params->hdr.tag = ATAG_INITRD2;
326 params->hdr.size = tag_size (tag_initrd);
328 params->u.initrd.start = initrd_start;
329 params->u.initrd.size = initrd_end - initrd_start;
331 params = tag_next (params);
333 #endif /* CONFIG_INITRD_TAG */
336 #if defined (CONFIG_VFD)
337 static void setup_videolfb_tag (gd_t *gd)
339 /* An ATAG_VIDEOLFB node tells the kernel where and how large
340 * the framebuffer for video was allocated (among other things).
341 * Note that a _physical_ address is passed !
343 * We only use it to pass the address and size, the other entries
344 * in the tag_videolfb are not of interest.
346 params->hdr.tag = ATAG_VIDEOLFB;
347 params->hdr.size = tag_size (tag_videolfb);
349 params->u.videolfb.lfb_base = (u32) gd->fb_base;
350 /* 7168 = 256*4*56/8 - actually 2 pages (8192 bytes) are allocated */
351 params->u.videolfb.lfb_size = 7168;
353 params = tag_next (params);
357 static void setup_end_tag (bd_t *bd)
359 params->hdr.tag = ATAG_NONE;
360 params->hdr.size = 0;
363 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */