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>
33 #include <asm/setup.h>
34 #define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
35 #define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size))
38 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
40 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
41 defined (CONFIG_CMDLINE_TAG) || \
42 defined (CONFIG_INITRD_TAG) || \
44 static void setup_start_tag(bd_t *bd);
45 # ifdef CONFIG_SETUP_MEMORY_TAGS
46 static void setup_memory_tags(bd_t *bd);
48 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, ulong initrd_end);
55 static void setup_end_tag(bd_t *bd);
56 # if defined (CONFIG_VFD)
57 static void setup_videolfb_tag(gd_t *gd);
61 static struct tag *params;
62 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
64 #ifdef CONFIG_SHOW_BOOT_PROGRESS
65 # include <status_led.h>
66 # define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
68 # define SHOW_BOOT_PROGRESS(arg)
71 extern image_header_t header; /* from cmd_bootm.c */
74 void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
75 ulong addr, ulong *len_ptr, int verify)
77 DECLARE_GLOBAL_DATA_PTR;
79 ulong len = 0, checksum;
80 ulong initrd_start, initrd_end;
82 void (*theKernel)(int zero, int arch);
83 image_header_t *hdr = &header;
85 #ifdef CONFIG_CMDLINE_TAG
86 char *commandline = getenv("bootargs");
89 theKernel = (void (*)(int, int))ntohl(hdr->ih_ep);
92 * Check if there is an initrd image
95 SHOW_BOOT_PROGRESS (9);
97 addr = simple_strtoul(argv[2], NULL, 16);
99 printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
101 /* Copy header so we can blank CRC field for re-calculation */
102 #ifdef CONFIG_HAS_DATAFLASH
103 if (addr_dataflash(addr)){
104 read_dataflash(addr, sizeof(image_header_t), (char *)&header);
107 memcpy (&header, (char *)addr, sizeof(image_header_t));
109 if (ntohl(hdr->ih_magic) != IH_MAGIC) {
110 printf ("Bad Magic Number\n");
111 SHOW_BOOT_PROGRESS (-10);
112 do_reset (cmdtp, flag, argc, argv);
115 data = (ulong)&header;
116 len = sizeof(image_header_t);
118 checksum = ntohl(hdr->ih_hcrc);
121 if (crc32 (0, (char *)data, len) != checksum) {
122 printf ("Bad Header Checksum\n");
123 SHOW_BOOT_PROGRESS (-11);
124 do_reset (cmdtp, flag, argc, argv);
127 SHOW_BOOT_PROGRESS (10);
129 print_image_hdr (hdr);
131 data = addr + sizeof(image_header_t);
132 len = ntohl(hdr->ih_size);
134 #ifdef CONFIG_HAS_DATAFLASH
135 if (addr_dataflash(addr)){
136 read_dataflash(data, len, (char *)CFG_LOAD_ADDR);
137 data = CFG_LOAD_ADDR;
144 printf (" Verifying Checksum ... ");
145 csum = crc32 (0, (char *)data, len);
146 if (csum != ntohl(hdr->ih_dcrc)) {
147 printf ("Bad Data CRC\n");
148 SHOW_BOOT_PROGRESS (-12);
149 do_reset (cmdtp, flag, argc, argv);
154 SHOW_BOOT_PROGRESS (11);
156 if ((hdr->ih_os != IH_OS_LINUX) ||
157 (hdr->ih_arch != IH_CPU_ARM) ||
158 (hdr->ih_type != IH_TYPE_RAMDISK) ) {
159 printf ("No Linux ARM Ramdisk Image\n");
160 SHOW_BOOT_PROGRESS (-13);
161 do_reset (cmdtp, flag, argc, argv);
165 * Now check if we have a multifile image
167 } else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
168 ulong tail = ntohl(len_ptr[0]) % 4;
171 SHOW_BOOT_PROGRESS (13);
173 /* skip kernel length and terminator */
174 data = (ulong)(&len_ptr[2]);
175 /* skip any additional image length fields */
176 for (i=1; len_ptr[i]; ++i)
178 /* add kernel length, and align */
179 data += ntohl(len_ptr[0]);
184 len = ntohl(len_ptr[1]);
190 SHOW_BOOT_PROGRESS (14);
197 printf ("No initrd\n");
203 initrd_end = initrd_start + len;
209 SHOW_BOOT_PROGRESS (15);
212 printf ("## Transferring control to Linux (at address %08lx) ...\n",
216 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
217 defined (CONFIG_CMDLINE_TAG) || \
218 defined (CONFIG_INITRD_TAG) || \
221 #ifdef CONFIG_SETUP_MEMORY_TAGS
222 setup_memory_tags(bd);
224 #ifdef CONFIG_CMDLINE_TAG
225 setup_commandline_tag(bd, commandline);
227 #ifdef CONFIG_INITRD_TAG
228 setup_initrd_tag(bd, initrd_start, initrd_end);
231 setup_ramdisk_tag(bd);
233 #if defined (CONFIG_VFD)
234 setup_videolfb_tag((gd_t *)gd);
239 /* we assume that the kernel is in place */
240 printf("\nStarting kernel ...\n\n");
242 cleanup_before_linux();
244 theKernel(0, bd->bi_arch_number);
248 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
249 defined (CONFIG_CMDLINE_TAG) || \
250 defined (CONFIG_INITRD_TAG) || \
252 static void setup_start_tag(bd_t *bd)
254 params = (struct tag *)bd->bi_boot_params;
256 params->hdr.tag = ATAG_CORE;
257 params->hdr.size = tag_size(tag_core);
259 params->u.core.flags = 0;
260 params->u.core.pagesize = 0;
261 params->u.core.rootdev = 0;
263 params = tag_next(params);
267 #ifdef CONFIG_SETUP_MEMORY_TAGS
268 static void setup_memory_tags(bd_t *bd)
272 for(i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
273 params->hdr.tag = ATAG_MEM;
274 params->hdr.size = tag_size(tag_mem32);
276 params->u.mem.start = bd->bi_dram[i].start;
277 params->u.mem.size = bd->bi_dram[i].size;
279 params = tag_next(params);
282 #endif /* CONFIG_SETUP_MEMORY_TAGS */
285 static void setup_commandline_tag(bd_t *bd, char *commandline)
289 /* eat leading white space */
290 for(p = commandline; *p == ' '; p++)
293 /* skip non-existent command lines so the kernel will still
294 * use its default command line.
299 params->hdr.tag = ATAG_CMDLINE;
300 params->hdr.size = (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
302 strcpy(params->u.cmdline.cmdline, p);
304 params = tag_next(params);
309 #define ATAG_INITRD2 0x54420005
312 #ifdef CONFIG_INITRD_TAG
313 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
315 /* an ATAG_INITRD node tells the kernel where the compressed
316 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
318 params->hdr.tag = ATAG_INITRD2;
319 params->hdr.size = tag_size(tag_initrd);
321 params->u.initrd.start = initrd_start;
322 params->u.initrd.size = initrd_end - initrd_start;
324 params = tag_next(params);
326 #endif /* CONFIG_INITRD_TAG */
330 static void setup_ramdisk_tag(bd_t *bd)
332 /* an ATAG_RAMDISK node tells the kernel how large the
333 * decompressed ramdisk will become.
335 params->hdr.tag = ATAG_RAMDISK;
336 params->hdr.size = tag_size(tag_ramdisk);
338 params->u.ramdisk.start = 0;
339 /*params->u.ramdisk.size = RAMDISK_SIZE; */
340 params->u.ramdisk.flags = 1; /* automatically load ramdisk */
342 params = tag_next(params);
346 #if defined (CONFIG_VFD)
347 static void setup_videolfb_tag(gd_t *gd)
349 /* An ATAG_VIDEOLFB node tells the kernel where and how large
350 * the framebuffer for video was allocated (among other things).
351 * Note that a _physical_ address is passed !
353 * We only use it to pass the address and size, the other entries
354 * in the tag_videolfb are not of interest.
356 params->hdr.tag = ATAG_VIDEOLFB;
357 params->hdr.size = tag_size(tag_videolfb);
359 params->u.videolfb.lfb_base = (u32)gd->fb_base;
360 /* 7168 = 256*4*56/8 - actually 2 pages (8192 bytes) are allocated */
361 params->u.videolfb.lfb_size = 7168;
363 params = tag_next(params);
367 static void setup_end_tag(bd_t *bd)
369 params->hdr.tag = ATAG_NONE;
370 params->hdr.size = 0;
373 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */