lib_arm/bootm.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * Copyright (C) 2001  Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
   7  *
   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.
  12  *
  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.
  17  *
  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
  21  *
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <image.h>
  27 #include <zlib.h>
  28 #include <asm/byteorder.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  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) || \
  38     defined (CONFIG_LCD)
  39 static void setup_start_tag (bd_t *bd);
  40
  41 # ifdef CONFIG_SETUP_MEMORY_TAGS
  42 static void setup_memory_tags (bd_t *bd);
  43 # endif
  44 static void setup_commandline_tag (bd_t *bd, char *commandline);
  45
  46 #if 0
  47 static void setup_ramdisk_tag (bd_t *bd);
  48 #endif
  49 # ifdef CONFIG_INITRD_TAG
  50 static void setup_initrd_tag (bd_t *bd, ulong initrd_start,
  51                               ulong initrd_end);
  52 # endif
  53 static void setup_end_tag (bd_t *bd);
  54
  55 # if defined (CONFIG_VFD) || defined (CONFIG_LCD)
  56 static void setup_videolfb_tag (gd_t *gd);
  57 # endif
  58
  59 static struct tag *params;
  60 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
  61
  62 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  63
  64 void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  65                      bootm_headers_t *images)
  66 {
  67         ulong   initrd_start, initrd_end;
  68         ulong   ep = 0;
  69         bd_t    *bd = gd->bd;
  70         char    *s;
  71         int     machid = bd->bi_arch_number;
  72         void    (*theKernel)(int zero, int arch, uint params);
  73         int     ret;
  74
  75 #ifdef CONFIG_CMDLINE_TAG
  76         char *commandline = getenv ("bootargs");
  77 #endif
  78
  79         /* find kernel entry point */
  80         if (images->legacy_hdr_valid) {
  81                 ep = image_get_ep (images->legacy_hdr_os);
  82 #if defined(CONFIG_FIT)
  83         } else if (images->fit_uname_os) {
  84                 ret = fit_image_get_entry (images->fit_hdr_os,
  85                                         images->fit_noffset_os, &ep);
  86                 if (ret) {
  87                         puts ("Can't get entry point property!\n");
  88                         goto error;
  89                 }
  90 #endif
  91         } else {
  92                 puts ("Could not find kernel entry point!\n");
  93                 goto error;
  94         }
  95         theKernel = (void (*)(int, int, uint))ep;
  96
  97         s = getenv ("machid");
  98         if (s) {
  99                 machid = simple_strtoul (s, NULL, 16);
 100                 printf ("Using machid 0x%x from environment\n", machid);
 101         }
 102
 103         ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_ARM,
 104                         &initrd_start, &initrd_end);
 105         if (ret)
 106                 goto error;
 107
 108         show_boot_progress (15);
 109
 110         debug ("## Transferring control to Linux (at address %08lx) ...\n",
 111                (ulong) theKernel);
 112
 113 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
 114     defined (CONFIG_CMDLINE_TAG) || \
 115     defined (CONFIG_INITRD_TAG) || \
 116     defined (CONFIG_SERIAL_TAG) || \
 117     defined (CONFIG_REVISION_TAG) || \
 118     defined (CONFIG_LCD) || \
 119     defined (CONFIG_VFD)
 120         setup_start_tag (bd);
 121 #ifdef CONFIG_SERIAL_TAG
 122         setup_serial_tag (&params);
 123 #endif
 124 #ifdef CONFIG_REVISION_TAG
 125         setup_revision_tag (&params);
 126 #endif
 127 #ifdef CONFIG_SETUP_MEMORY_TAGS
 128         setup_memory_tags (bd);
 129 #endif
 130 #ifdef CONFIG_CMDLINE_TAG
 131         setup_commandline_tag (bd, commandline);
 132 #endif
 133 #ifdef CONFIG_INITRD_TAG
 134         if (initrd_start && initrd_end)
 135                 setup_initrd_tag (bd, initrd_start, initrd_end);
 136 #endif
 137 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
 138         setup_videolfb_tag ((gd_t *) gd);
 139 #endif
 140         setup_end_tag (bd);
 141 #endif
 142
 143         if (!images->autostart)
 144                 return ;
 145
 146         /* we assume that the kernel is in place */
 147         printf ("\nStarting kernel ...\n\n");
 148
 149 #ifdef CONFIG_USB_DEVICE
 150         {
 151                 extern void udc_disconnect (void);
 152                 udc_disconnect ();
 153         }
 154 #endif
 155
 156         cleanup_before_linux ();
 157
 158         theKernel (0, machid, bd->bi_boot_params);
 159         /* does not return */
 160         return;
 161
 162 error:
 163         if (images->autostart)
 164                 do_reset (cmdtp, flag, argc, argv);
 165         return;
 166 }
 167
 168
 169 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
 170     defined (CONFIG_CMDLINE_TAG) || \
 171     defined (CONFIG_INITRD_TAG) || \
 172     defined (CONFIG_SERIAL_TAG) || \
 173     defined (CONFIG_REVISION_TAG) || \
 174     defined (CONFIG_LCD) || \
 175     defined (CONFIG_VFD)
 176 static void setup_start_tag (bd_t *bd)
 177 {
 178         params = (struct tag *) bd->bi_boot_params;
 179
 180         params->hdr.tag = ATAG_CORE;
 181         params->hdr.size = tag_size (tag_core);
 182
 183         params->u.core.flags = 0;
 184         params->u.core.pagesize = 0;
 185         params->u.core.rootdev = 0;
 186
 187         params = tag_next (params);
 188 }
 189
 190
 191 #ifdef CONFIG_SETUP_MEMORY_TAGS
 192 static void setup_memory_tags (bd_t *bd)
 193 {
 194         int i;
 195
 196         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 197                 params->hdr.tag = ATAG_MEM;
 198                 params->hdr.size = tag_size (tag_mem32);
 199
 200                 params->u.mem.start = bd->bi_dram[i].start;
 201                 params->u.mem.size = bd->bi_dram[i].size;
 202
 203                 params = tag_next (params);
 204         }
 205 }
 206 #endif /* CONFIG_SETUP_MEMORY_TAGS */
 207
 208
 209 static void setup_commandline_tag (bd_t *bd, char *commandline)
 210 {
 211         char *p;
 212
 213         if (!commandline)
 214                 return;
 215
 216         /* eat leading white space */
 217         for (p = commandline; *p == ' '; p++);
 218
 219         /* skip non-existent command lines so the kernel will still
 220          * use its default command line.
 221          */
 222         if (*p == '\0')
 223                 return;
 224
 225         params->hdr.tag = ATAG_CMDLINE;
 226         params->hdr.size =
 227                 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
 228
 229         strcpy (params->u.cmdline.cmdline, p);
 230
 231         params = tag_next (params);
 232 }
 233
 234
 235 #ifdef CONFIG_INITRD_TAG
 236 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
 237 {
 238         /* an ATAG_INITRD node tells the kernel where the compressed
 239          * ramdisk can be found. ATAG_RDIMG is a better name, actually.
 240          */
 241         params->hdr.tag = ATAG_INITRD2;
 242         params->hdr.size = tag_size (tag_initrd);
 243
 244         params->u.initrd.start = initrd_start;
 245         params->u.initrd.size = initrd_end - initrd_start;
 246
 247         params = tag_next (params);
 248 }
 249 #endif /* CONFIG_INITRD_TAG */
 250
 251
 252 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
 253 extern ulong calc_fbsize (void);
 254 static void setup_videolfb_tag (gd_t *gd)
 255 {
 256         /* An ATAG_VIDEOLFB node tells the kernel where and how large
 257          * the framebuffer for video was allocated (among other things).
 258          * Note that a _physical_ address is passed !
 259          *
 260          * We only use it to pass the address and size, the other entries
 261          * in the tag_videolfb are not of interest.
 262          */
 263         params->hdr.tag = ATAG_VIDEOLFB;
 264         params->hdr.size = tag_size (tag_videolfb);
 265
 266         params->u.videolfb.lfb_base = (u32) gd->fb_base;
 267         /* Fb size is calculated according to parameters for our panel
 268          */
 269         params->u.videolfb.lfb_size = calc_fbsize();
 270
 271         params = tag_next (params);
 272 }
 273 #endif /* CONFIG_VFD || CONFIG_LCD */
 274
 275 #ifdef CONFIG_SERIAL_TAG
 276 void setup_serial_tag (struct tag **tmp)
 277 {
 278         struct tag *params = *tmp;
 279         struct tag_serialnr serialnr;
 280         void get_board_serial(struct tag_serialnr *serialnr);
 281
 282         get_board_serial(&serialnr);
 283         params->hdr.tag = ATAG_SERIAL;
 284         params->hdr.size = tag_size (tag_serialnr);
 285         params->u.serialnr.low = serialnr.low;
 286         params->u.serialnr.high= serialnr.high;
 287         params = tag_next (params);
 288         *tmp = params;
 289 }
 290 #endif
 291
 292 #ifdef CONFIG_REVISION_TAG
 293 void setup_revision_tag(struct tag **in_params)
 294 {
 295         u32 rev = 0;
 296         u32 get_board_rev(void);
 297
 298         rev = get_board_rev();
 299         params->hdr.tag = ATAG_REVISION;
 300         params->hdr.size = tag_size (tag_revision);
 301         params->u.revision.rev = rev;
 302         params = tag_next (params);
 303 }
 304 #endif  /* CONFIG_REVISION_TAG */
 305
 306
 307 static void setup_end_tag (bd_t *bd)
 308 {
 309         params->hdr.tag = ATAG_NONE;
 310         params->hdr.size = 0;
 311 }
 312
 313 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */