arch/microblaze/lib/board.c

   1 /*
   2  * (C) Copyright 2007 Michal Simek
   3  * (C) Copyright 2004 Atmark Techno, Inc.
   4  *
   5  * Michal  SIMEK <monstr@monstr.eu>
   6  * Yasushi SHOJI <yashi@atmark-techno.com>
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <command.h>
  29 #include <malloc.h>
  30 #include <version.h>
  31 #include <watchdog.h>
  32 #include <stdio_dev.h>
  33 #include <serial.h>
  34 #include <net.h>
  35 #include <linux/compiler.h>
  36 #include <asm/processor.h>
  37 #include <asm/microblaze_intc.h>
  38 #include <fdtdec.h>
  39
  40 DECLARE_GLOBAL_DATA_PTR;
  41
  42 /*
  43  * All attempts to come up with a "common" initialization sequence
  44  * that works for all boards and architectures failed: some of the
  45  * requirements are just _too_ different. To get rid of the resulting
  46  * mess of board dependend #ifdef'ed code we now make the whole
  47  * initialization sequence configurable to the user.
  48  *
  49  * The requirements for any new initalization function is simple: it
  50  * receives a pointer to the "global data" structure as it's only
  51  * argument, and returns an integer return code, where 0 means
  52  * "continue" and != 0 means "fatal error, hang the system".
  53  */
  54 typedef int (init_fnc_t) (void);
  55
  56 init_fnc_t *init_sequence[] = {
  57         env_init,
  58 #ifdef CONFIG_OF_CONTROL
  59         fdtdec_check_fdt,
  60 #endif
  61         serial_init,
  62         console_init_f,
  63         interrupts_init,
  64         timer_init,
  65         NULL,
  66 };
  67
  68 unsigned long monitor_flash_len;
  69
  70 void board_init_f(ulong not_used)
  71 {
  72         bd_t *bd;
  73         init_fnc_t **init_fnc_ptr;
  74         gd = (gd_t *) (CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_GBL_DATA_OFFSET);
  75         bd = (bd_t *) (CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_GBL_DATA_OFFSET \
  76                                                 - GENERATED_BD_INFO_SIZE);
  77 #if defined(CONFIG_CMD_FLASH)
  78         ulong flash_size = 0;
  79 #endif
  80         asm ("nop");    /* FIXME gd is not initialize - wait */
  81         memset ((void *)gd, 0, GENERATED_GBL_DATA_SIZE);
  82         memset ((void *)bd, 0, GENERATED_BD_INFO_SIZE);
  83         gd->bd = bd;
  84         gd->baudrate = CONFIG_BAUDRATE;
  85         bd->bi_baudrate = CONFIG_BAUDRATE;
  86         bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
  87         bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
  88         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
  89
  90         monitor_flash_len = __end - __text_start;
  91
  92 #ifdef CONFIG_OF_EMBED
  93         /* Get a pointer to the FDT */
  94         gd->fdt_blob = _binary_dt_dtb_start;
  95 #elif defined CONFIG_OF_SEPARATE
  96         /* FDT is at end of image */
  97         gd->fdt_blob = (void *)__end;
  98 #endif
  99         /* Allow the early environment to override the fdt address */
 100         gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
 101                                                 (uintptr_t)gd->fdt_blob);
 102
 103         /*
 104          * The Malloc area is immediately below the monitor copy in DRAM
 105          * aka CONFIG_SYS_MONITOR_BASE - Note there is no need for reloc_off
 106          * as our monitory code is run from SDRAM
 107          */
 108         mem_malloc_init (CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);
 109
 110         serial_initialize();
 111
 112         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 113                 WATCHDOG_RESET ();
 114                 if ((*init_fnc_ptr) () != 0) {
 115                         hang ();
 116                 }
 117         }
 118
 119 #ifdef CONFIG_OF_CONTROL
 120         /* For now, put this check after the console is ready */
 121         if (fdtdec_prepare_fdt()) {
 122                 panic("** CONFIG_OF_CONTROL defined but no FDT - please see "
 123                         "doc/README.fdt-control");
 124         } else
 125                 printf("DTB: 0x%x\n", (u32)gd->fdt_blob);
 126 #endif
 127
 128         puts ("SDRAM :\n");
 129         printf ("\t\tIcache:%s\n", icache_status() ? "ON" : "OFF");
 130         printf ("\t\tDcache:%s\n", dcache_status() ? "ON" : "OFF");
 131         printf ("\tU-Boot Start:0x%08x\n", CONFIG_SYS_TEXT_BASE);
 132
 133 #if defined(CONFIG_CMD_FLASH)
 134         puts ("Flash: ");
 135         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 136         flash_size = flash_init();
 137         if (bd->bi_flashstart && flash_size > 0) {
 138 # ifdef CONFIG_SYS_FLASH_CHECKSUM
 139                 print_size (flash_size, "");
 140                 /*
 141                  * Compute and print flash CRC if flashchecksum is set to 'y'
 142                  *
 143                  * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
 144                  */
 145                 if (getenv_yesno("flashchecksum") == 1) {
 146                         printf ("  CRC: %08X",
 147                                 crc32(0, (const u8 *)bd->bi_flashstart,
 148                                                         flash_size)
 149                         );
 150                 }
 151                 putc ('\n');
 152 # else  /* !CONFIG_SYS_FLASH_CHECKSUM */
 153                 print_size (flash_size, "\n");
 154 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
 155                 bd->bi_flashsize = flash_size;
 156                 bd->bi_flashoffset = bd->bi_flashstart + flash_size;
 157         } else {
 158                 puts ("Flash init FAILED");
 159                 bd->bi_flashstart = 0;
 160                 bd->bi_flashsize = 0;
 161                 bd->bi_flashoffset = 0;
 162         }
 163 #endif
 164
 165         /* relocate environment function pointers etc. */
 166         env_relocate ();
 167
 168         /* Initialize stdio devices */
 169         stdio_init ();
 170
 171         /* Initialize the jump table for applications */
 172         jumptable_init();
 173
 174         /* Initialize the console (after the relocation and devices init) */
 175         console_init_r();
 176
 177         board_init();
 178
 179         /* Initialize from environment */
 180         load_addr = getenv_ulong("loadaddr", 16, load_addr);
 181
 182 #if defined(CONFIG_CMD_NET)
 183         printf("Net:   ");
 184         eth_initialize(gd->bd);
 185
 186         uchar enetaddr[6];
 187         eth_getenv_enetaddr("ethaddr", enetaddr);
 188         printf("MAC:   %pM\n", enetaddr);
 189 #endif
 190
 191         /* main_loop */
 192         for (;;) {
 193                 WATCHDOG_RESET ();
 194                 main_loop ();
 195         }
 196 }
 197
 198 void hang (void)
 199 {
 200         puts ("### ERROR ### Please RESET the board ###\n");
 201         for (;;) ;
 202 }