arch/arm/boot/compressed/head-shmobile.S

   1 /*
   2  * The head-file for SH-Mobile ARM platforms
   3  *
   4  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   5  * Simon Horman <horms@verge.net.au>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #ifdef CONFIG_ZBOOT_ROM
  22
  23         .section        ".start", "ax"
  24
  25         /* load board-specific initialization code */
  26 #include <mach/zboot.h>
  27
  28 #if defined(CONFIG_ZBOOT_ROM_MMCIF) || defined(CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI)
  29         /* Load image from MMC/SD */
  30         adr     sp, __tmp_stack + 256
  31         ldr     r0, __image_start
  32         ldr     r1, __image_end
  33         subs    r1, r1, r0
  34         ldr     r0, __load_base
  35         bl      mmc_loader
  36
  37         /* Jump to loaded code */
  38         ldr     r0, __loaded
  39         ldr     r1, __image_start
  40         sub     r0, r0, r1
  41         ldr     r1, __load_base
  42         add     pc, r0, r1
  43
  44 __image_start:
  45         .long   _start
  46 __image_end:
  47         .long   _got_end
  48 __load_base:
  49         .long   CONFIG_MEMORY_START + 0x02000000 @ Load at 32Mb into SDRAM
  50 __loaded:
  51         .long   __continue
  52         .align
  53 __tmp_stack:
  54         .space  256
  55 __continue:
  56 #endif /* CONFIG_ZBOOT_ROM_MMC || CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI */
  57
  58         b       1f
  59 __atags:@ tag #1
  60         .long   12                      @ tag->hdr.size = tag_size(tag_core);
  61         .long   0x54410001              @ tag->hdr.tag = ATAG_CORE;
  62         .long   0                       @ tag->u.core.flags = 0;
  63         .long   0                       @ tag->u.core.pagesize = 0;
  64         .long   0                       @ tag->u.core.rootdev = 0;
  65         @ tag #2
  66         .long   8                       @ tag->hdr.size = tag_size(tag_mem32);
  67         .long   0x54410002              @ tag->hdr.tag = ATAG_MEM;
  68         .long   CONFIG_MEMORY_SIZE      @ tag->u.mem.size = CONFIG_MEMORY_SIZE;
  69         .long   CONFIG_MEMORY_START     @ @ tag->u.mem.start = CONFIG_MEMORY_START;
  70         @ tag #3
  71         .long   0                       @ tag->hdr.size = 0
  72         .long   0                       @ tag->hdr.tag = ATAG_NONE;
  73 1:
  74
  75         /* Set board ID necessary for boot */
  76         ldr     r7, 1f                          @ Set machine type register
  77         adr     r8, __atags                     @ Set atag register
  78         b       2f
  79
  80 1 :     .long MACH_TYPE
  81 2 :
  82
  83 #endif /* CONFIG_ZBOOT_ROM */