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 right below the monitor image in RAM */
  51 static void mem_malloc_init(void)
  52 {
  53         unsigned long monitor_addr;
  54
  55         monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
  56         mem_malloc_end = monitor_addr;
  57         mem_malloc_start = mem_malloc_end - CFG_MALLOC_LEN;
  58         mem_malloc_brk = mem_malloc_start;
  59
  60         printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
  61                mem_malloc_start, mem_malloc_end);
  62
  63         memset ((void *)mem_malloc_start, 0,
  64                 mem_malloc_end - mem_malloc_start);
  65 }
  66
  67 void *sbrk(ptrdiff_t increment)
  68 {
  69         unsigned long old = mem_malloc_brk;
  70         unsigned long new = old + increment;
  71
  72         if ((new < mem_malloc_start) || (new > mem_malloc_end))
  73                 return NULL;
  74
  75         mem_malloc_brk = new;
  76         return ((void *)old);
  77 }
  78
  79 #ifdef CFG_DMA_ALLOC_LEN
  80 #include <asm/cacheflush.h>
  81 #include <asm/io.h>
  82
  83 static unsigned long dma_alloc_start;
  84 static unsigned long dma_alloc_end;
  85 static unsigned long dma_alloc_brk;
  86
  87 static void dma_alloc_init(void)
  88 {
  89         unsigned long monitor_addr;
  90
  91         monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
  92         dma_alloc_end = monitor_addr - CFG_MALLOC_LEN;
  93         dma_alloc_start = dma_alloc_end - CFG_DMA_ALLOC_LEN;
  94         dma_alloc_brk = dma_alloc_start;
  95
  96         printf("DMA: Using memory from 0x%08lx to 0x%08lx\n",
  97                dma_alloc_start, dma_alloc_end);
  98
  99         dcache_invalidate_range(cached(dma_alloc_start),
 100                                 dma_alloc_end - dma_alloc_start);
 101 }
 102
 103 void *dma_alloc_coherent(size_t len, unsigned long *handle)
 104 {
 105         unsigned long paddr = dma_alloc_brk;
 106
 107         if (dma_alloc_brk + len > dma_alloc_end)
 108                 return NULL;
 109
 110         dma_alloc_brk = ((paddr + len + CFG_DCACHE_LINESZ - 1)
 111                          & ~(CFG_DCACHE_LINESZ - 1));
 112
 113         *handle = paddr;
 114         return uncached(paddr);
 115 }
 116 #else
 117 static inline void dma_alloc_init(void)
 118 {
 119
 120 }
 121 #endif
 122
 123 static int init_baudrate(void)
 124 {
 125         char tmp[64];
 126         int i;
 127
 128         i = getenv_r("baudrate", tmp, sizeof(tmp));
 129         if (i > 0) {
 130                 gd->baudrate = simple_strtoul(tmp, NULL, 10);
 131         } else {
 132                 gd->baudrate = CONFIG_BAUDRATE;
 133         }
 134         return 0;
 135 }
 136
 137
 138 static int display_banner (void)
 139 {
 140         printf ("\n\n%s\n\n", version_string);
 141         printf ("U-Boot code: %p -> %p  data: %p -> %p\n",
 142                 _text, _etext, _data, _end);
 143         return 0;
 144 }
 145
 146 void hang(void)
 147 {
 148         for (;;) ;
 149 }
 150
 151 static int display_dram_config (void)
 152 {
 153         int i;
 154
 155         puts ("DRAM Configuration:\n");
 156
 157         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 158                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 159                 print_size (gd->bd->bi_dram[i].size, "\n");
 160         }
 161
 162         return 0;
 163 }
 164
 165 static void display_flash_config (void)
 166 {
 167         puts ("Flash: ");
 168         print_size(gd->bd->bi_flashsize, " ");
 169         printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
 170 }
 171
 172 void board_init_f(ulong board_type)
 173 {
 174         gd_t gd_data;
 175         gd_t *new_gd;
 176         bd_t *bd;
 177         unsigned long *new_sp;
 178         unsigned long monitor_len;
 179         unsigned long monitor_addr;
 180         unsigned long addr;
 181         long sdram_size;
 182
 183         /* Initialize the global data pointer */
 184         memset(&gd_data, 0, sizeof(gd_data));
 185         gd = &gd_data;
 186
 187         /* Perform initialization sequence */
 188         board_early_init_f();
 189         cpu_init();
 190         env_init();
 191         init_baudrate();
 192         serial_init();
 193         console_init_f();
 194         display_banner();
 195         sdram_size = initdram(board_type);
 196
 197         /* If we have no SDRAM, we can't go on */
 198         if (sdram_size <= 0)
 199                 panic("No working SDRAM available\n");
 200
 201         /*
 202          * Now that we have DRAM mapped and working, we can
 203          * relocate the code and continue running from DRAM.
 204          *
 205          * Reserve memory at end of RAM for (top down in that order):
 206          *  - u-boot image
 207          *  - heap for malloc()
 208          *  - board info struct
 209          *  - global data struct
 210          *  - stack
 211          */
 212         addr = CFG_SDRAM_BASE + sdram_size;
 213         monitor_len = _end - _text;
 214
 215         /*
 216          * Reserve memory for u-boot code, data and bss.
 217          * Round down to next 4 kB limit.
 218          */
 219         addr -= monitor_len;
 220         addr &= ~(4096UL - 1);
 221         monitor_addr = addr;
 222
 223         /* Reserve memory for malloc() */
 224         addr -= CFG_MALLOC_LEN;
 225
 226 #ifdef CFG_DMA_ALLOC_LEN
 227         /* Reserve DMA memory (must be cache aligned) */
 228         addr &= ~(CFG_DCACHE_LINESZ - 1);
 229         addr -= CFG_DMA_ALLOC_LEN;
 230 #endif
 231
 232         /* Allocate a Board Info struct on a word boundary */
 233         addr -= sizeof(bd_t);
 234         addr &= ~3UL;
 235         gd->bd = bd = (bd_t *)addr;
 236
 237         /* Allocate a new global data copy on a 8-byte boundary. */
 238         addr -= sizeof(gd_t);
 239         addr &= ~7UL;
 240         new_gd = (gd_t *)addr;
 241
 242         /* And finally, a new, bigger stack. */
 243         new_sp = (unsigned long *)addr;
 244         gd->stack_end = addr;
 245         *(--new_sp) = 0;
 246         *(--new_sp) = 0;
 247
 248         /*
 249          * Initialize the board information struct with the
 250          * information we have.
 251          */
 252         bd->bi_dram[0].start = CFG_SDRAM_BASE;
 253         bd->bi_dram[0].size = sdram_size;
 254         bd->bi_baudrate = gd->baudrate;
 255
 256         memcpy(new_gd, gd, sizeof(gd_t));
 257
 258         relocate_code((unsigned long)new_sp, new_gd, monitor_addr);
 259 }
 260
 261 void board_init_r(gd_t *new_gd, ulong dest_addr)
 262 {
 263         extern void malloc_bin_reloc (void);
 264 #ifndef CFG_ENV_IS_NOWHERE
 265         extern char * env_name_spec;
 266 #endif
 267         char *s;
 268         cmd_tbl_t *cmdtp;
 269         bd_t *bd;
 270
 271         gd = new_gd;
 272         bd = gd->bd;
 273
 274         gd->flags |= GD_FLG_RELOC;
 275         gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
 276
 277         monitor_flash_len = _edata - _text;
 278
 279         /*
 280          * We have to relocate the command table manually
 281          */
 282         for (cmdtp = &__u_boot_cmd_start;
 283              cmdtp !=  &__u_boot_cmd_end; cmdtp++) {
 284                 unsigned long addr;
 285
 286                 addr = (unsigned long)cmdtp->cmd + gd->reloc_off;
 287                 cmdtp->cmd = (typeof(cmdtp->cmd))addr;
 288
 289                 addr = (unsigned long)cmdtp->name + gd->reloc_off;
 290                 cmdtp->name = (typeof(cmdtp->name))addr;
 291
 292                 if (cmdtp->usage) {
 293                         addr = (unsigned long)cmdtp->usage + gd->reloc_off;
 294                         cmdtp->usage = (typeof(cmdtp->usage))addr;
 295                 }
 296 #ifdef CFG_LONGHELP
 297                 if (cmdtp->help) {
 298                         addr = (unsigned long)cmdtp->help + gd->reloc_off;
 299                         cmdtp->help = (typeof(cmdtp->help))addr;
 300                 }
 301 #endif
 302         }
 303
 304         /* there are some other pointer constants we must deal with */
 305 #ifndef CFG_ENV_IS_NOWHERE
 306         env_name_spec += gd->reloc_off;
 307 #endif
 308
 309         timer_init();
 310         mem_malloc_init();
 311         malloc_bin_reloc();
 312         dma_alloc_init();
 313         board_init_info();
 314
 315         enable_interrupts();
 316
 317         bd->bi_flashstart = 0;
 318         bd->bi_flashsize = 0;
 319         bd->bi_flashoffset = 0;
 320
 321 #ifndef CFG_NO_FLASH
 322         bd->bi_flashstart = CFG_FLASH_BASE;
 323         bd->bi_flashsize = flash_init();
 324         bd->bi_flashoffset = (unsigned long)_edata - (unsigned long)_text;
 325
 326         if (bd->bi_flashsize)
 327                 display_flash_config();
 328 #endif
 329
 330         if (bd->bi_dram[0].size)
 331                 display_dram_config();
 332
 333         gd->bd->bi_boot_params = malloc(CFG_BOOTPARAMS_LEN);
 334         if (!gd->bd->bi_boot_params)
 335                 puts("WARNING: Cannot allocate space for boot parameters\n");
 336
 337         /* initialize environment */
 338         env_relocate();
 339
 340         bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
 341
 342         devices_init();
 343         jumptable_init();
 344         console_init_r();
 345
 346         s = getenv("loadaddr");
 347         if (s)
 348                 load_addr = simple_strtoul(s, NULL, 16);
 349
 350 #if defined(CONFIG_CMD_NET)
 351         s = getenv("bootfile");
 352         if (s)
 353                 copy_filename(BootFile, s, sizeof(BootFile));
 354 #if defined(CONFIG_NET_MULTI)
 355         puts("Net:   ");
 356 #endif
 357         eth_initialize(gd->bd);
 358 #endif
 359
 360         for (;;) {
 361                 main_loop();
 362         }
 363 }