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 <timestamp.h>
  27 #include <version.h>
  28 #include <net.h>
  29
  30 #include <asm/initcalls.h>
  31 #include <asm/sections.h>
  32
  33 #ifndef CONFIG_IDENT_STRING
  34 #define CONFIG_IDENT_STRING ""
  35 #endif
  36
  37 DECLARE_GLOBAL_DATA_PTR;
  38
  39 const char version_string[] =
  40         U_BOOT_VERSION " ("U_BOOT_DATE" - "U_BOOT_TIME") " CONFIG_IDENT_STRING;
  41
  42 unsigned long monitor_flash_len;
  43
  44 /*
  45  * Begin and end of memory area for malloc(), and current "brk"
  46  */
  47 static unsigned long mem_malloc_start = 0;
  48 static unsigned long mem_malloc_end = 0;
  49 static unsigned long mem_malloc_brk = 0;
  50
  51 /* Weak aliases for optional board functions */
  52 static int __do_nothing(void)
  53 {
  54         return 0;
  55 }
  56 int board_postclk_init(void) __attribute__((weak, alias("__do_nothing")));
  57 int board_early_init_r(void) __attribute__((weak, alias("__do_nothing")));
  58
  59 /* The malloc area is right below the monitor image in RAM */
  60 static void mem_malloc_init(void)
  61 {
  62         unsigned long monitor_addr;
  63
  64         monitor_addr = CONFIG_SYS_MONITOR_BASE + gd->reloc_off;
  65         mem_malloc_end = monitor_addr;
  66         mem_malloc_start = mem_malloc_end - CONFIG_SYS_MALLOC_LEN;
  67         mem_malloc_brk = mem_malloc_start;
  68
  69         printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
  70                mem_malloc_start, mem_malloc_end);
  71
  72         memset ((void *)mem_malloc_start, 0,
  73                 mem_malloc_end - mem_malloc_start);
  74 }
  75
  76 void *sbrk(ptrdiff_t increment)
  77 {
  78         unsigned long old = mem_malloc_brk;
  79         unsigned long new = old + increment;
  80
  81         if ((new < mem_malloc_start) || (new > mem_malloc_end))
  82                 return NULL;
  83
  84         mem_malloc_brk = new;
  85         return ((void *)old);
  86 }
  87
  88 #ifdef CONFIG_SYS_DMA_ALLOC_LEN
  89 #include <asm/cacheflush.h>
  90 #include <asm/io.h>
  91
  92 static unsigned long dma_alloc_start;
  93 static unsigned long dma_alloc_end;
  94 static unsigned long dma_alloc_brk;
  95
  96 static void dma_alloc_init(void)
  97 {
  98         unsigned long monitor_addr;
  99
 100         monitor_addr = CONFIG_SYS_MONITOR_BASE + gd->reloc_off;
 101         dma_alloc_end = monitor_addr - CONFIG_SYS_MALLOC_LEN;
 102         dma_alloc_start = dma_alloc_end - CONFIG_SYS_DMA_ALLOC_LEN;
 103         dma_alloc_brk = dma_alloc_start;
 104
 105         printf("DMA: Using memory from 0x%08lx to 0x%08lx\n",
 106                dma_alloc_start, dma_alloc_end);
 107
 108         dcache_invalidate_range(cached(dma_alloc_start),
 109                                 dma_alloc_end - dma_alloc_start);
 110 }
 111
 112 void *dma_alloc_coherent(size_t len, unsigned long *handle)
 113 {
 114         unsigned long paddr = dma_alloc_brk;
 115
 116         if (dma_alloc_brk + len > dma_alloc_end)
 117                 return NULL;
 118
 119         dma_alloc_brk = ((paddr + len + CONFIG_SYS_DCACHE_LINESZ - 1)
 120                          & ~(CONFIG_SYS_DCACHE_LINESZ - 1));
 121
 122         *handle = paddr;
 123         return uncached(paddr);
 124 }
 125 #else
 126 static inline void dma_alloc_init(void)
 127 {
 128
 129 }
 130 #endif
 131
 132 static int init_baudrate(void)
 133 {
 134         char tmp[64];
 135         int i;
 136
 137         i = getenv_r("baudrate", tmp, sizeof(tmp));
 138         if (i > 0) {
 139                 gd->baudrate = simple_strtoul(tmp, NULL, 10);
 140         } else {
 141                 gd->baudrate = CONFIG_BAUDRATE;
 142         }
 143         return 0;
 144 }
 145
 146
 147 static int display_banner (void)
 148 {
 149         printf ("\n\n%s\n\n", version_string);
 150         printf ("U-Boot code: %p -> %p  data: %p -> %p\n",
 151                 _text, _etext, _data, _end);
 152         return 0;
 153 }
 154
 155 void hang(void)
 156 {
 157         for (;;) ;
 158 }
 159
 160 static int display_dram_config (void)
 161 {
 162         int i;
 163
 164         puts ("DRAM Configuration:\n");
 165
 166         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 167                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 168                 print_size (gd->bd->bi_dram[i].size, "\n");
 169         }
 170
 171         return 0;
 172 }
 173
 174 static void display_flash_config (void)
 175 {
 176         puts ("Flash: ");
 177         print_size(gd->bd->bi_flashsize, " ");
 178         printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
 179 }
 180
 181 void board_init_f(ulong board_type)
 182 {
 183         gd_t gd_data;
 184         gd_t *new_gd;
 185         bd_t *bd;
 186         unsigned long *new_sp;
 187         unsigned long monitor_len;
 188         unsigned long monitor_addr;
 189         unsigned long addr;
 190         long sdram_size;
 191
 192         /* Initialize the global data pointer */
 193         memset(&gd_data, 0, sizeof(gd_data));
 194         gd = &gd_data;
 195
 196         /* Perform initialization sequence */
 197         board_early_init_f();
 198         cpu_init();
 199         board_postclk_init();
 200         env_init();
 201         init_baudrate();
 202         serial_init();
 203         console_init_f();
 204         display_banner();
 205         sdram_size = initdram(board_type);
 206
 207         /* If we have no SDRAM, we can't go on */
 208         if (sdram_size <= 0)
 209                 panic("No working SDRAM available\n");
 210
 211         /*
 212          * Now that we have DRAM mapped and working, we can
 213          * relocate the code and continue running from DRAM.
 214          *
 215          * Reserve memory at end of RAM for (top down in that order):
 216          *  - u-boot image
 217          *  - heap for malloc()
 218          *  - board info struct
 219          *  - global data struct
 220          *  - stack
 221          */
 222         addr = CONFIG_SYS_SDRAM_BASE + sdram_size;
 223         monitor_len = _end - _text;
 224
 225         /*
 226          * Reserve memory for u-boot code, data and bss.
 227          * Round down to next 4 kB limit.
 228          */
 229         addr -= monitor_len;
 230         addr &= ~(4096UL - 1);
 231         monitor_addr = addr;
 232
 233         /* Reserve memory for malloc() */
 234         addr -= CONFIG_SYS_MALLOC_LEN;
 235
 236 #ifdef CONFIG_SYS_DMA_ALLOC_LEN
 237         /* Reserve DMA memory (must be cache aligned) */
 238         addr &= ~(CONFIG_SYS_DCACHE_LINESZ - 1);
 239         addr -= CONFIG_SYS_DMA_ALLOC_LEN;
 240 #endif
 241
 242         /* Allocate a Board Info struct on a word boundary */
 243         addr -= sizeof(bd_t);
 244         addr &= ~3UL;
 245         gd->bd = bd = (bd_t *)addr;
 246
 247         /* Allocate a new global data copy on a 8-byte boundary. */
 248         addr -= sizeof(gd_t);
 249         addr &= ~7UL;
 250         new_gd = (gd_t *)addr;
 251
 252         /* And finally, a new, bigger stack. */
 253         new_sp = (unsigned long *)addr;
 254         gd->stack_end = addr;
 255         *(--new_sp) = 0;
 256         *(--new_sp) = 0;
 257
 258         /*
 259          * Initialize the board information struct with the
 260          * information we have.
 261          */
 262         bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 263         bd->bi_dram[0].size = sdram_size;
 264         bd->bi_baudrate = gd->baudrate;
 265
 266         memcpy(new_gd, gd, sizeof(gd_t));
 267
 268         relocate_code((unsigned long)new_sp, new_gd, monitor_addr);
 269 }
 270
 271 void board_init_r(gd_t *new_gd, ulong dest_addr)
 272 {
 273         extern void malloc_bin_reloc (void);
 274 #ifndef CONFIG_ENV_IS_NOWHERE
 275         extern char * env_name_spec;
 276 #endif
 277         char *s;
 278         cmd_tbl_t *cmdtp;
 279         bd_t *bd;
 280
 281         gd = new_gd;
 282         bd = gd->bd;
 283
 284         gd->flags |= GD_FLG_RELOC;
 285         gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
 286
 287         board_early_init_r();
 288
 289         monitor_flash_len = _edata - _text;
 290
 291         /*
 292          * We have to relocate the command table manually
 293          */
 294         for (cmdtp = &__u_boot_cmd_start;
 295              cmdtp !=  &__u_boot_cmd_end; cmdtp++) {
 296                 unsigned long addr;
 297
 298                 addr = (unsigned long)cmdtp->cmd + gd->reloc_off;
 299                 cmdtp->cmd = (typeof(cmdtp->cmd))addr;
 300
 301                 addr = (unsigned long)cmdtp->name + gd->reloc_off;
 302                 cmdtp->name = (typeof(cmdtp->name))addr;
 303
 304                 if (cmdtp->usage) {
 305                         addr = (unsigned long)cmdtp->usage + gd->reloc_off;
 306                         cmdtp->usage = (typeof(cmdtp->usage))addr;
 307                 }
 308 #ifdef CONFIG_SYS_LONGHELP
 309                 if (cmdtp->help) {
 310                         addr = (unsigned long)cmdtp->help + gd->reloc_off;
 311                         cmdtp->help = (typeof(cmdtp->help))addr;
 312                 }
 313 #endif
 314         }
 315
 316         /* there are some other pointer constants we must deal with */
 317 #ifndef CONFIG_ENV_IS_NOWHERE
 318         env_name_spec += gd->reloc_off;
 319 #endif
 320
 321         timer_init();
 322         mem_malloc_init();
 323         malloc_bin_reloc();
 324         dma_alloc_init();
 325
 326         enable_interrupts();
 327
 328         bd->bi_flashstart = 0;
 329         bd->bi_flashsize = 0;
 330         bd->bi_flashoffset = 0;
 331
 332 #ifndef CONFIG_SYS_NO_FLASH
 333         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 334         bd->bi_flashsize = flash_init();
 335         bd->bi_flashoffset = (unsigned long)_edata - (unsigned long)_text;
 336
 337         if (bd->bi_flashsize)
 338                 display_flash_config();
 339 #endif
 340
 341         if (bd->bi_dram[0].size)
 342                 display_dram_config();
 343
 344         gd->bd->bi_boot_params = malloc(CONFIG_SYS_BOOTPARAMS_LEN);
 345         if (!gd->bd->bi_boot_params)
 346                 puts("WARNING: Cannot allocate space for boot parameters\n");
 347
 348         /* initialize environment */
 349         env_relocate();
 350
 351         bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
 352
 353         devices_init();
 354         jumptable_init();
 355         console_init_r();
 356
 357         s = getenv("loadaddr");
 358         if (s)
 359                 load_addr = simple_strtoul(s, NULL, 16);
 360
 361 #if defined(CONFIG_CMD_NET)
 362         s = getenv("bootfile");
 363         if (s)
 364                 copy_filename(BootFile, s, sizeof(BootFile));
 365 #if defined(CONFIG_NET_MULTI)
 366         puts("Net:   ");
 367 #endif
 368         eth_initialize(gd->bd);
 369 #endif
 370
 371         for (;;) {
 372                 main_loop();
 373         }
 374 }