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
  74 #ifdef CONFIG_CMDLINE_TAG
  75         char *commandline = getenv ("bootargs");
  76 #endif
  77
  78         /* find kernel entry point */
  79         if (images->legacy_hdr_valid) {
  80                 ep = image_get_ep (images->legacy_hdr_os);
  81 #if defined(CONFIG_FIT)
  82         } else if (images->fit_uname_os) {
  83                 fit_unsupported_reset ("ARM linux bootm");
  84                 do_reset (cmdtp, flag, argc, argv);
  85 #endif
  86         } else {
  87                 puts ("Could not find kernel entry point!\n");
  88                 do_reset (cmdtp, flag, argc, argv);
  89         }
  90         theKernel = (void (*)(int, int, uint))ep;
  91
  92         s = getenv ("machid");
  93         if (s) {
  94                 machid = simple_strtoul (s, NULL, 16);
  95                 printf ("Using machid 0x%x from environment\n", machid);
  96         }
  97
  98         ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_ARM,
  99                         &initrd_start, &initrd_end);
 100         if (ret)
 101                 do_reset (cmdtp, flag, argc, argv);
 102
 103         show_boot_progress (15);
 104
 105         debug ("## Transferring control to Linux (at address %08lx) ...\n",
 106                (ulong) theKernel);
 107
 108 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
 109     defined (CONFIG_CMDLINE_TAG) || \
 110     defined (CONFIG_INITRD_TAG) || \
 111     defined (CONFIG_SERIAL_TAG) || \
 112     defined (CONFIG_REVISION_TAG) || \
 113     defined (CONFIG_LCD) || \
 114     defined (CONFIG_VFD)
 115         setup_start_tag (bd);
 116 #ifdef CONFIG_SERIAL_TAG
 117         setup_serial_tag (&params);
 118 #endif
 119 #ifdef CONFIG_REVISION_TAG
 120         setup_revision_tag (&params);
 121 #endif
 122 #ifdef CONFIG_SETUP_MEMORY_TAGS
 123         setup_memory_tags (bd);
 124 #endif
 125 #ifdef CONFIG_CMDLINE_TAG
 126         setup_commandline_tag (bd, commandline);
 127 #endif
 128 #ifdef CONFIG_INITRD_TAG
 129         if (initrd_start && initrd_end)
 130                 setup_initrd_tag (bd, initrd_start, initrd_end);
 131 #endif
 132 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
 133         setup_videolfb_tag ((gd_t *) gd);
 134 #endif
 135         setup_end_tag (bd);
 136 #endif
 137
 138         if (!images->autostart)
 139                 return ;
 140
 141         /* we assume that the kernel is in place */
 142         printf ("\nStarting kernel ...\n\n");
 143
 144 #ifdef CONFIG_USB_DEVICE
 145         {
 146                 extern void udc_disconnect (void);
 147                 udc_disconnect ();
 148         }
 149 #endif
 150
 151         cleanup_before_linux ();
 152
 153         theKernel (0, machid, bd->bi_boot_params);
 154 }
 155
 156
 157 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
 158     defined (CONFIG_CMDLINE_TAG) || \
 159     defined (CONFIG_INITRD_TAG) || \
 160     defined (CONFIG_SERIAL_TAG) || \
 161     defined (CONFIG_REVISION_TAG) || \
 162     defined (CONFIG_LCD) || \
 163     defined (CONFIG_VFD)
 164 static void setup_start_tag (bd_t *bd)
 165 {
 166         params = (struct tag *) bd->bi_boot_params;
 167
 168         params->hdr.tag = ATAG_CORE;
 169         params->hdr.size = tag_size (tag_core);
 170
 171         params->u.core.flags = 0;
 172         params->u.core.pagesize = 0;
 173         params->u.core.rootdev = 0;
 174
 175         params = tag_next (params);
 176 }
 177
 178
 179 #ifdef CONFIG_SETUP_MEMORY_TAGS
 180 static void setup_memory_tags (bd_t *bd)
 181 {
 182         int i;
 183
 184         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 185                 params->hdr.tag = ATAG_MEM;
 186                 params->hdr.size = tag_size (tag_mem32);
 187
 188                 params->u.mem.start = bd->bi_dram[i].start;
 189                 params->u.mem.size = bd->bi_dram[i].size;
 190
 191                 params = tag_next (params);
 192         }
 193 }
 194 #endif /* CONFIG_SETUP_MEMORY_TAGS */
 195
 196
 197 static void setup_commandline_tag (bd_t *bd, char *commandline)
 198 {
 199         char *p;
 200
 201         if (!commandline)
 202                 return;
 203
 204         /* eat leading white space */
 205         for (p = commandline; *p == ' '; p++);
 206
 207         /* skip non-existent command lines so the kernel will still
 208          * use its default command line.
 209          */
 210         if (*p == '\0')
 211                 return;
 212
 213         params->hdr.tag = ATAG_CMDLINE;
 214         params->hdr.size =
 215                 (sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;
 216
 217         strcpy (params->u.cmdline.cmdline, p);
 218
 219         params = tag_next (params);
 220 }
 221
 222
 223 #ifdef CONFIG_INITRD_TAG
 224 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
 225 {
 226         /* an ATAG_INITRD node tells the kernel where the compressed
 227          * ramdisk can be found. ATAG_RDIMG is a better name, actually.
 228          */
 229         params->hdr.tag = ATAG_INITRD2;
 230         params->hdr.size = tag_size (tag_initrd);
 231
 232         params->u.initrd.start = initrd_start;
 233         params->u.initrd.size = initrd_end - initrd_start;
 234
 235         params = tag_next (params);
 236 }
 237 #endif /* CONFIG_INITRD_TAG */
 238
 239
 240 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
 241 extern ulong calc_fbsize (void);
 242 static void setup_videolfb_tag (gd_t *gd)
 243 {
 244         /* An ATAG_VIDEOLFB node tells the kernel where and how large
 245          * the framebuffer for video was allocated (among other things).
 246          * Note that a _physical_ address is passed !
 247          *
 248          * We only use it to pass the address and size, the other entries
 249          * in the tag_videolfb are not of interest.
 250          */
 251         params->hdr.tag = ATAG_VIDEOLFB;
 252         params->hdr.size = tag_size (tag_videolfb);
 253
 254         params->u.videolfb.lfb_base = (u32) gd->fb_base;
 255         /* Fb size is calculated according to parameters for our panel
 256          */
 257         params->u.videolfb.lfb_size = calc_fbsize();
 258
 259         params = tag_next (params);
 260 }
 261 #endif /* CONFIG_VFD || CONFIG_LCD */
 262
 263 #ifdef CONFIG_SERIAL_TAG
 264 void setup_serial_tag (struct tag **tmp)
 265 {
 266         struct tag *params = *tmp;
 267         struct tag_serialnr serialnr;
 268         void get_board_serial(struct tag_serialnr *serialnr);
 269
 270         get_board_serial(&serialnr);
 271         params->hdr.tag = ATAG_SERIAL;
 272         params->hdr.size = tag_size (tag_serialnr);
 273         params->u.serialnr.low = serialnr.low;
 274         params->u.serialnr.high= serialnr.high;
 275         params = tag_next (params);
 276         *tmp = params;
 277 }
 278 #endif
 279
 280 #ifdef CONFIG_REVISION_TAG
 281 void setup_revision_tag(struct tag **in_params)
 282 {
 283         u32 rev = 0;
 284         u32 get_board_rev(void);
 285
 286         rev = get_board_rev();
 287         params->hdr.tag = ATAG_REVISION;
 288         params->hdr.size = tag_size (tag_revision);
 289         params->u.revision.rev = rev;
 290         params = tag_next (params);
 291 }
 292 #endif  /* CONFIG_REVISION_TAG */
 293
 294
 295 static void setup_end_tag (bd_t *bd)
 296 {
 297         params->hdr.tag = ATAG_NONE;
 298         params->hdr.size = 0;
 299 }
 300
 301 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */