lib_avr32/board.c

   1 /*
   2  * Copyright (C) 2004-2006 Atmel Corporation
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22 #include <common.h>
  23 #include <command.h>
  24 #include <malloc.h>
  25 #include <devices.h>
  26 #include <version.h>
  27 #include <net.h>
  28
  29 #include <asm/initcalls.h>
  30 #include <asm/sections.h>
  31
  32 #ifndef CONFIG_IDENT_STRING
  33 #define CONFIG_IDENT_STRING ""
  34 #endif
  35
  36 DECLARE_GLOBAL_DATA_PTR;
  37
  38 const char version_string[] =
  39         U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ") " CONFIG_IDENT_STRING;
  40
  41 unsigned long monitor_flash_len;
  42
  43 /*
  44  * Begin and end of memory area for malloc(), and current "brk"
  45  */
  46 static unsigned long mem_malloc_start = 0;
  47 static unsigned long mem_malloc_end = 0;
  48 static unsigned long mem_malloc_brk = 0;
  49
  50 /* The malloc area is wherever the board wants it to be */
  51 static void mem_malloc_init(void)
  52 {
  53         mem_malloc_start = CFG_MALLOC_START;
  54         mem_malloc_end = CFG_MALLOC_END;
  55         mem_malloc_brk = mem_malloc_start;
  56
  57         printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
  58                mem_malloc_start, mem_malloc_end);
  59
  60         memset ((void *)mem_malloc_start, 0,
  61                 mem_malloc_end - mem_malloc_start);
  62 }
  63
  64 void *sbrk(ptrdiff_t increment)
  65 {
  66         unsigned long old = mem_malloc_brk;
  67         unsigned long new = old + increment;
  68
  69         if ((new < mem_malloc_start) || (new > mem_malloc_end))
  70                 return NULL;
  71
  72         mem_malloc_brk = new;
  73         return ((void *)old);
  74 }
  75
  76 static int init_baudrate(void)
  77 {
  78         char tmp[64];
  79         int i;
  80
  81         i = getenv_r("baudrate", tmp, sizeof(tmp));
  82         if (i > 0) {
  83                 gd->baudrate = simple_strtoul(tmp, NULL, 10);
  84         } else {
  85                 gd->baudrate = CONFIG_BAUDRATE;
  86         }
  87         return 0;
  88 }
  89
  90
  91 static int display_banner (void)
  92 {
  93         printf ("\n\n%s\n\n", version_string);
  94         printf ("U-Boot code: %p -> %p  data: %p -> %p\n",
  95                 _text, _etext, _data, _end);
  96         return 0;
  97 }
  98
  99 void hang(void)
 100 {
 101         for (;;) ;
 102 }
 103
 104 static int display_dram_config (void)
 105 {
 106         int i;
 107
 108         puts ("DRAM Configuration:\n");
 109
 110         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 111                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 112                 print_size (gd->bd->bi_dram[i].size, "\n");
 113         }
 114
 115         return 0;
 116 }
 117
 118 static void display_flash_config (void)
 119 {
 120         puts ("Flash: ");
 121         print_size(gd->bd->bi_flashsize, " ");
 122         printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
 123 }
 124
 125 void start_u_boot (void)
 126 {
 127         gd_t gd_data;
 128
 129         /* Initialize the global data pointer */
 130         memset(&gd_data, 0, sizeof(gd_data));
 131         gd = &gd_data;
 132
 133         monitor_flash_len = _edata - _text;
 134
 135         /* Perform initialization sequence */
 136         cpu_init();
 137         timer_init();
 138         env_init();
 139         init_baudrate();
 140         serial_init();
 141         console_init_f();
 142         display_banner();
 143
 144         board_init_memories();
 145         mem_malloc_init();
 146
 147         gd->bd = malloc(sizeof(bd_t));
 148         memset(gd->bd, 0, sizeof(bd_t));
 149         gd->bd->bi_baudrate = gd->baudrate;
 150         gd->bd->bi_dram[0].start = CFG_SDRAM_BASE;
 151         gd->bd->bi_dram[0].size = gd->sdram_size;
 152
 153         board_init_info();
 154         flash_init();
 155
 156         if (gd->bd->bi_flashsize)
 157                 display_flash_config();
 158         if (gd->bd->bi_dram[0].size)
 159                 display_dram_config();
 160
 161         gd->bd->bi_boot_params = malloc(CFG_BOOTPARAMS_LEN);
 162         if (!gd->bd->bi_boot_params)
 163                 puts("WARNING: Cannot allocate space for boot parameters\n");
 164
 165         /* initialize environment */
 166         env_relocate();
 167
 168         devices_init();
 169         jumptable_init();
 170         console_init_r();
 171
 172         for (;;) {
 173                 main_loop();
 174         }
 175 }