arch/avr32/lib/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 <stdio_dev.h>
  26 #include <timestamp.h>
  27 #include <version.h>
  28 #include <net.h>
  29
  30 #ifdef CONFIG_BITBANGMII
  31 #include <miiphy.h>
  32 #endif
  33
  34 #include <asm/initcalls.h>
  35 #include <asm/sections.h>
  36 #include <asm/arch/mmu.h>
  37
  38 #ifndef CONFIG_IDENT_STRING
  39 #define CONFIG_IDENT_STRING ""
  40 #endif
  41
  42 DECLARE_GLOBAL_DATA_PTR;
  43
  44 const char version_string[] =
  45         U_BOOT_VERSION " ("U_BOOT_DATE" - "U_BOOT_TIME") " CONFIG_IDENT_STRING;
  46
  47 unsigned long monitor_flash_len;
  48
  49 /* Weak aliases for optional board functions */
  50 static int __do_nothing(void)
  51 {
  52         return 0;
  53 }
  54 int board_postclk_init(void) __attribute__((weak, alias("__do_nothing")));
  55 int board_early_init_r(void) __attribute__((weak, alias("__do_nothing")));
  56
  57 #ifdef CONFIG_SYS_DMA_ALLOC_LEN
  58 #include <asm/arch/cacheflush.h>
  59 #include <asm/io.h>
  60
  61 static unsigned long dma_alloc_start;
  62 static unsigned long dma_alloc_end;
  63 static unsigned long dma_alloc_brk;
  64
  65 static void dma_alloc_init(void)
  66 {
  67         unsigned long monitor_addr;
  68
  69         monitor_addr = CONFIG_SYS_MONITOR_BASE + gd->reloc_off;
  70         dma_alloc_end = monitor_addr - CONFIG_SYS_MALLOC_LEN;
  71         dma_alloc_start = dma_alloc_end - CONFIG_SYS_DMA_ALLOC_LEN;
  72         dma_alloc_brk = dma_alloc_start;
  73
  74         printf("DMA: Using memory from 0x%08lx to 0x%08lx\n",
  75                dma_alloc_start, dma_alloc_end);
  76
  77         dcache_invalidate_range(cached(dma_alloc_start),
  78                                 dma_alloc_end - dma_alloc_start);
  79 }
  80
  81 void *dma_alloc_coherent(size_t len, unsigned long *handle)
  82 {
  83         unsigned long paddr = dma_alloc_brk;
  84
  85         if (dma_alloc_brk + len > dma_alloc_end)
  86                 return NULL;
  87
  88         dma_alloc_brk = ((paddr + len + CONFIG_SYS_DCACHE_LINESZ - 1)
  89                          & ~(CONFIG_SYS_DCACHE_LINESZ - 1));
  90
  91         *handle = paddr;
  92         return uncached(paddr);
  93 }
  94 #else
  95 static inline void dma_alloc_init(void)
  96 {
  97
  98 }
  99 #endif
 100
 101 static int init_baudrate(void)
 102 {
 103         char tmp[64];
 104         int i;
 105
 106         i = getenv_f("baudrate", tmp, sizeof(tmp));
 107         if (i > 0) {
 108                 gd->baudrate = simple_strtoul(tmp, NULL, 10);
 109         } else {
 110                 gd->baudrate = CONFIG_BAUDRATE;
 111         }
 112         return 0;
 113 }
 114
 115
 116 static int display_banner (void)
 117 {
 118         printf ("\n\n%s\n\n", version_string);
 119         printf ("U-Boot code: %08lx -> %08lx  data: %08lx -> %08lx\n",
 120                 (unsigned long)_text, (unsigned long)_etext,
 121                 (unsigned long)_data, (unsigned long)_end);
 122         return 0;
 123 }
 124
 125 void hang(void)
 126 {
 127         for (;;) ;
 128 }
 129
 130 static int display_dram_config (void)
 131 {
 132         int i;
 133
 134         puts ("DRAM Configuration:\n");
 135
 136         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 137                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 138                 print_size (gd->bd->bi_dram[i].size, "\n");
 139         }
 140
 141         return 0;
 142 }
 143
 144 static void display_flash_config (void)
 145 {
 146         puts ("Flash: ");
 147         print_size(gd->bd->bi_flashsize, " ");
 148         printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
 149 }
 150
 151 void board_init_f(ulong board_type)
 152 {
 153         gd_t gd_data;
 154         gd_t *new_gd;
 155         bd_t *bd;
 156         unsigned long *new_sp;
 157         unsigned long monitor_len;
 158         unsigned long monitor_addr;
 159         unsigned long addr;
 160         long sdram_size;
 161
 162         /* Initialize the global data pointer */
 163         memset(&gd_data, 0, sizeof(gd_data));
 164         gd = &gd_data;
 165
 166         /* Perform initialization sequence */
 167         board_early_init_f();
 168         cpu_init();
 169         board_postclk_init();
 170         env_init();
 171         init_baudrate();
 172         serial_init();
 173         console_init_f();
 174         display_banner();
 175         sdram_size = initdram(board_type);
 176
 177         /* If we have no SDRAM, we can't go on */
 178         if (sdram_size <= 0)
 179                 panic("No working SDRAM available\n");
 180
 181         /*
 182          * Now that we have DRAM mapped and working, we can
 183          * relocate the code and continue running from DRAM.
 184          *
 185          * Reserve memory at end of RAM for (top down in that order):
 186          *  - u-boot image
 187          *  - heap for malloc()
 188          *  - board info struct
 189          *  - global data struct
 190          *  - stack
 191          */
 192         addr = CONFIG_SYS_SDRAM_BASE + sdram_size;
 193         monitor_len = _end - _text;
 194
 195         /*
 196          * Reserve memory for u-boot code, data and bss.
 197          * Round down to next 4 kB limit.
 198          */
 199         addr -= monitor_len;
 200         addr &= ~(4096UL - 1);
 201         monitor_addr = addr;
 202
 203         /* Reserve memory for malloc() */
 204         addr -= CONFIG_SYS_MALLOC_LEN;
 205
 206 #ifdef CONFIG_SYS_DMA_ALLOC_LEN
 207         /* Reserve DMA memory (must be cache aligned) */
 208         addr &= ~(CONFIG_SYS_DCACHE_LINESZ - 1);
 209         addr -= CONFIG_SYS_DMA_ALLOC_LEN;
 210 #endif
 211
 212 #ifdef CONFIG_LCD
 213 #ifdef CONFIG_FB_ADDR
 214         printf("LCD: Frame buffer allocated at preset 0x%08x\n",
 215                CONFIG_FB_ADDR);
 216         gd->fb_base = (void *)CONFIG_FB_ADDR;
 217 #else
 218         addr = lcd_setmem(addr);
 219         printf("LCD: Frame buffer allocated at 0x%08lx\n", addr);
 220         gd->fb_base = (void *)addr;
 221 #endif /* CONFIG_FB_ADDR */
 222 #endif /* CONFIG_LCD */
 223
 224         /* Allocate a Board Info struct on a word boundary */
 225         addr -= sizeof(bd_t);
 226         addr &= ~3UL;
 227         gd->bd = bd = (bd_t *)addr;
 228
 229         /* Allocate a new global data copy on a 8-byte boundary. */
 230         addr -= sizeof(gd_t);
 231         addr &= ~7UL;
 232         new_gd = (gd_t *)addr;
 233
 234         /* And finally, a new, bigger stack. */
 235         new_sp = (unsigned long *)addr;
 236         gd->stack_end = addr;
 237         *(--new_sp) = 0;
 238         *(--new_sp) = 0;
 239
 240         /*
 241          * Initialize the board information struct with the
 242          * information we have.
 243          */
 244         bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 245         bd->bi_dram[0].size = sdram_size;
 246         bd->bi_baudrate = gd->baudrate;
 247
 248         memcpy(new_gd, gd, sizeof(gd_t));
 249
 250         relocate_code((unsigned long)new_sp, new_gd, monitor_addr);
 251 }
 252
 253 void board_init_r(gd_t *new_gd, ulong dest_addr)
 254 {
 255         extern void malloc_bin_reloc (void);
 256 #ifndef CONFIG_ENV_IS_NOWHERE
 257         extern char * env_name_spec;
 258 #endif
 259         char *s;
 260         cmd_tbl_t *cmdtp;
 261         bd_t *bd;
 262
 263         gd = new_gd;
 264         bd = gd->bd;
 265
 266         gd->flags |= GD_FLG_RELOC;
 267         gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
 268
 269         /* Enable the MMU so that we can keep u-boot simple */
 270         mmu_init_r(dest_addr);
 271
 272         board_early_init_r();
 273
 274         monitor_flash_len = _edata - _text;
 275
 276 #if !defined(CONFIG_RELOC_FIXUP_WORKS)
 277         /*
 278          * We have to relocate the command table manually
 279          */
 280         fixup_cmdtable(&__u_boot_cmd_start,
 281                 (ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
 282 #endif /* !defined(CONFIG_RELOC_FIXUP_WORKS) */
 283
 284         /* there are some other pointer constants we must deal with */
 285 #ifndef CONFIG_ENV_IS_NOWHERE
 286         env_name_spec += gd->reloc_off;
 287 #endif
 288
 289         timer_init();
 290
 291         /* The malloc area is right below the monitor image in RAM */
 292         mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
 293                         CONFIG_SYS_MALLOC_LEN, CONFIG_SYS_MALLOC_LEN);
 294         malloc_bin_reloc();
 295         dma_alloc_init();
 296
 297         enable_interrupts();
 298
 299         bd->bi_flashstart = 0;
 300         bd->bi_flashsize = 0;
 301         bd->bi_flashoffset = 0;
 302
 303 #ifndef CONFIG_SYS_NO_FLASH
 304         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 305         bd->bi_flashsize = flash_init();
 306         bd->bi_flashoffset = (unsigned long)_edata - (unsigned long)_text;
 307
 308         if (bd->bi_flashsize)
 309                 display_flash_config();
 310 #endif
 311
 312         if (bd->bi_dram[0].size)
 313                 display_dram_config();
 314
 315         gd->bd->bi_boot_params = malloc(CONFIG_SYS_BOOTPARAMS_LEN);
 316         if (!gd->bd->bi_boot_params)
 317                 puts("WARNING: Cannot allocate space for boot parameters\n");
 318
 319         /* initialize environment */
 320         env_relocate();
 321
 322         bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
 323
 324         stdio_init();
 325         jumptable_init();
 326         console_init_r();
 327
 328         s = getenv("loadaddr");
 329         if (s)
 330                 load_addr = simple_strtoul(s, NULL, 16);
 331
 332 #ifdef CONFIG_BITBANGMII
 333         bb_miiphy_init();
 334 #endif
 335 #if defined(CONFIG_CMD_NET)
 336         s = getenv("bootfile");
 337         if (s)
 338                 copy_filename(BootFile, s, sizeof(BootFile));
 339 #if defined(CONFIG_NET_MULTI)
 340         puts("Net:   ");
 341 #endif
 342         eth_initialize(gd->bd);
 343 #endif
 344
 345         for (;;) {
 346                 main_loop();
 347         }
 348 }