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);
171 *we need to copy the ramdisk to SRAM to let Linux boot
173 memmove ((void *) ntohl(hdr->ih_load), (uchar *)data, len);
174 data = ntohl(hdr->ih_load);
175 #endif /* CONFIG_B2 */
178 * Now check if we have a multifile image
180 } else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
181 ulong tail = ntohl (len_ptr[0]) % 4;
184 SHOW_BOOT_PROGRESS (13);
186 /* skip kernel length and terminator */
187 data = (ulong) (&len_ptr[2]);
188 /* skip any additional image length fields */
189 for (i = 1; len_ptr[i]; ++i)
191 /* add kernel length, and align */
192 data += ntohl (len_ptr[0]);
197 len = ntohl (len_ptr[1]);
203 SHOW_BOOT_PROGRESS (14);
210 printf ("No initrd\n");
216 initrd_end = initrd_start + len;
222 SHOW_BOOT_PROGRESS (15);
224 debug ("## Transferring control to Linux (at address %08lx) ...\n",
227 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
228 defined (CONFIG_CMDLINE_TAG) || \
229 defined (CONFIG_INITRD_TAG) || \
230 defined (CONFIG_SERIAL_TAG) || \
231 defined (CONFIG_REVISION_TAG) || \
233 setup_start_tag (bd);
234 #ifdef CONFIG_SERIAL_TAG
235 setup_serial_tag (¶ms);
237 #ifdef CONFIG_REVISION_TAG
238 setup_revision_tag (¶ms);
240 #ifdef CONFIG_SETUP_MEMORY_TAGS
241 setup_memory_tags (bd);
243 #ifdef CONFIG_CMDLINE_TAG
244 setup_commandline_tag (bd, commandline);
246 #ifdef CONFIG_INITRD_TAG
247 if (initrd_start && initrd_end)
248 setup_initrd_tag (bd, initrd_start, initrd_end);
250 #if defined (CONFIG_VFD)
251 setup_videolfb_tag ((gd_t *) gd);
256 /* we assume that the kernel is in place */
257 printf ("\nStarting kernel ...\n\n");
259 cleanup_before_linux ();
261 theKernel (0, bd->bi_arch_number, bd->bi_boot_params);
265 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
266 defined (CONFIG_CMDLINE_TAG) || \
267 defined (CONFIG_INITRD_TAG) || \
268 defined (CONFIG_SERIAL_TAG) || \
269 defined (CONFIG_REVISION_TAG) || \
271 static void setup_start_tag (bd_t *bd)
273 params = (struct tag *) bd->bi_boot_params;
275 params->hdr.tag = ATAG_CORE;
276 params->hdr.size = tag_size (tag_core);
278 params->u.core.flags = 0;
279 params->u.core.pagesize = 0;
280 params->u.core.rootdev = 0;
282 params = tag_next (params);
286 #ifdef CONFIG_SETUP_MEMORY_TAGS
287 static void setup_memory_tags (bd_t *bd)
291 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
292 params->hdr.tag = ATAG_MEM;
293 params->hdr.size = tag_size (tag_mem32);
295 params->u.mem.start = bd->bi_dram[i].start;
296 params->u.mem.size = bd->bi_dram[i].size;
298 params = tag_next (params);
301 #endif /* CONFIG_SETUP_MEMORY_TAGS */
304 static void setup_commandline_tag (bd_t *bd, char *commandline)
308 /* eat leading white space */
309 for (p = commandline; *p == ' '; p++);
311 /* skip non-existent command lines so the kernel will still
312 * use its default command line.
317 params->hdr.tag = ATAG_CMDLINE;
319 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
321 strcpy (params->u.cmdline.cmdline, p);
323 params = tag_next (params);
327 #ifdef CONFIG_INITRD_TAG
328 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
330 /* an ATAG_INITRD node tells the kernel where the compressed
331 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
333 params->hdr.tag = ATAG_INITRD;
334 params->hdr.size = tag_size (tag_initrd);
336 params->u.initrd.start = initrd_start;
337 params->u.initrd.size = initrd_end - initrd_start;
339 params = tag_next (params);
341 #endif /* CONFIG_INITRD_TAG */
344 #if defined (CONFIG_VFD)
345 static void setup_videolfb_tag (gd_t *gd)
347 /* An ATAG_VIDEOLFB node tells the kernel where and how large
348 * the framebuffer for video was allocated (among other things).
349 * Note that a _physical_ address is passed !
351 * We only use it to pass the address and size, the other entries
352 * in the tag_videolfb are not of interest.
354 params->hdr.tag = ATAG_VIDEOLFB;
355 params->hdr.size = tag_size (tag_videolfb);
357 params->u.videolfb.lfb_base = (u32) gd->fb_base;
358 /* 7168 = 256*4*56/8 - actually 2 pages (8192 bytes) are allocated */
359 params->u.videolfb.lfb_size = 7168;
361 params = tag_next (params);
365 static void setup_end_tag (bd_t *bd)
367 params->hdr.tag = ATAG_NONE;
368 params->hdr.size = 0;
371 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */