arch/blackfin/lib/board.c

   1 /*
   2  * U-boot - board.c First C file to be called contains init routines
   3  *
   4  * Copyright (c) 2005-2008 Analog Devices Inc.
   5  *
   6  * (C) Copyright 2000-2004
   7  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   8  *
   9  * Licensed under the GPL-2 or later.
  10  */
  11
  12 #include <common.h>
  13 #include <command.h>
  14 #include <stdio_dev.h>
  15 #include <environment.h>
  16 #include <malloc.h>
  17 #include <mmc.h>
  18 #include <net.h>
  19 #include <timestamp.h>
  20 #include <status_led.h>
  21 #include <version.h>
  22
  23 #include <asm/cplb.h>
  24 #include <asm/mach-common/bits/mpu.h>
  25 #include <kgdb.h>
  26
  27 #ifdef CONFIG_CMD_NAND
  28 #include <nand.h>       /* cannot even include nand.h if it isnt configured */
  29 #endif
  30
  31 #ifdef CONFIG_BITBANGMII
  32 #include <miiphy.h>
  33 #endif
  34
  35 #if defined(CONFIG_POST)
  36 #include <post.h>
  37 int post_flag;
  38 #endif
  39
  40 DECLARE_GLOBAL_DATA_PTR;
  41
  42 const char version_string[] = U_BOOT_VERSION " ("U_BOOT_DATE" - "U_BOOT_TIME")";
  43
  44 __attribute__((always_inline))
  45 static inline void serial_early_puts(const char *s)
  46 {
  47 #ifdef CONFIG_DEBUG_EARLY_SERIAL
  48         serial_puts("Early: ");
  49         serial_puts(s);
  50 #endif
  51 }
  52
  53 static int display_banner(void)
  54 {
  55         printf("\n\n%s\n\n", version_string);
  56         printf("CPU:   ADSP " MK_STR(CONFIG_BFIN_CPU) " "
  57                 "(Detected Rev: 0.%d) "
  58                 "(%s boot)\n",
  59                 bfin_revid(),
  60                 get_bfin_boot_mode(CONFIG_BFIN_BOOT_MODE));
  61         return 0;
  62 }
  63
  64 static int init_baudrate(void)
  65 {
  66         char baudrate[15];
  67         int i = getenv_f("baudrate", baudrate, sizeof(baudrate));
  68         gd->bd->bi_baudrate = gd->baudrate = (i > 0)
  69             ? simple_strtoul(baudrate, NULL, 10)
  70             : CONFIG_BAUDRATE;
  71         return 0;
  72 }
  73
  74 static void display_global_data(void)
  75 {
  76         bd_t *bd;
  77
  78 #ifndef CONFIG_DEBUG_EARLY_SERIAL
  79         return;
  80 #endif
  81
  82         bd = gd->bd;
  83         printf(" gd: %p\n", gd);
  84         printf(" |-flags: %lx\n", gd->flags);
  85         printf(" |-board_type: %lx\n", gd->board_type);
  86         printf(" |-baudrate: %lu\n", gd->baudrate);
  87         printf(" |-have_console: %lx\n", gd->have_console);
  88         printf(" |-ram_size: %lx\n", gd->ram_size);
  89         printf(" |-env_addr: %lx\n", gd->env_addr);
  90         printf(" |-env_valid: %lx\n", gd->env_valid);
  91         printf(" |-jt(%p): %p\n", gd->jt, *(gd->jt));
  92         printf(" \\-bd: %p\n", gd->bd);
  93         printf("   |-bi_baudrate: %x\n", bd->bi_baudrate);
  94         printf("   |-bi_ip_addr: %lx\n", bd->bi_ip_addr);
  95         printf("   |-bi_boot_params: %lx\n", bd->bi_boot_params);
  96         printf("   |-bi_memstart: %lx\n", bd->bi_memstart);
  97         printf("   |-bi_memsize: %lx\n", bd->bi_memsize);
  98         printf("   |-bi_flashstart: %lx\n", bd->bi_flashstart);
  99         printf("   |-bi_flashsize: %lx\n", bd->bi_flashsize);
 100         printf("   \\-bi_flashoffset: %lx\n", bd->bi_flashoffset);
 101 }
 102
 103 #define CPLB_PAGE_SIZE (4 * 1024 * 1024)
 104 #define CPLB_PAGE_MASK (~(CPLB_PAGE_SIZE - 1))
 105 void init_cplbtables(void)
 106 {
 107         volatile uint32_t *ICPLB_ADDR, *ICPLB_DATA;
 108         volatile uint32_t *DCPLB_ADDR, *DCPLB_DATA;
 109         uint32_t extern_memory;
 110         size_t i;
 111
 112         void icplb_add(uint32_t addr, uint32_t data)
 113         {
 114                 *(ICPLB_ADDR + i) = addr;
 115                 *(ICPLB_DATA + i) = data;
 116         }
 117         void dcplb_add(uint32_t addr, uint32_t data)
 118         {
 119                 *(DCPLB_ADDR + i) = addr;
 120                 *(DCPLB_DATA + i) = data;
 121         }
 122
 123         /* populate a few common entries ... we'll let
 124          * the memory map and cplb exception handler do
 125          * the rest of the work.
 126          */
 127         i = 0;
 128         ICPLB_ADDR = (uint32_t *)ICPLB_ADDR0;
 129         ICPLB_DATA = (uint32_t *)ICPLB_DATA0;
 130         DCPLB_ADDR = (uint32_t *)DCPLB_ADDR0;
 131         DCPLB_DATA = (uint32_t *)DCPLB_DATA0;
 132
 133         icplb_add(0xFFA00000, L1_IMEMORY);
 134         dcplb_add(0xFF800000, L1_DMEMORY);
 135         ++i;
 136
 137         if (CONFIG_MEM_SIZE) {
 138                 uint32_t mbase = CONFIG_SYS_MONITOR_BASE;
 139                 uint32_t mend  = mbase + CONFIG_SYS_MONITOR_LEN;
 140                 mbase &= CPLB_PAGE_MASK;
 141                 mend &= CPLB_PAGE_MASK;
 142
 143                 icplb_add(mbase, SDRAM_IKERNEL);
 144                 dcplb_add(mbase, SDRAM_DKERNEL);
 145                 ++i;
 146
 147                 /*
 148                  * If the monitor crosses a 4 meg boundary, we'll need
 149                  * to lock two entries for it.  We assume it doesn't
 150                  * cross two 4 meg boundaries ...
 151                  */
 152                 if (mbase != mend) {
 153                         icplb_add(mend, SDRAM_IKERNEL);
 154                         dcplb_add(mend, SDRAM_DKERNEL);
 155                         ++i;
 156                 }
 157         }
 158
 159         icplb_add(0x20000000, SDRAM_INON_CHBL);
 160         dcplb_add(0x20000000, SDRAM_EBIU);
 161         ++i;
 162
 163         /* Add entries for the rest of external RAM up to the bootrom */
 164         extern_memory = 0;
 165
 166 #ifdef CONFIG_DEBUG_NULL_PTR
 167         icplb_add(extern_memory, (SDRAM_IKERNEL & ~PAGE_SIZE_MASK) | PAGE_SIZE_1KB);
 168         dcplb_add(extern_memory, (SDRAM_DKERNEL & ~PAGE_SIZE_MASK) | PAGE_SIZE_1KB);
 169         ++i;
 170         icplb_add(extern_memory, SDRAM_IKERNEL);
 171         dcplb_add(extern_memory, SDRAM_DKERNEL);
 172         extern_memory += CPLB_PAGE_SIZE;
 173         ++i;
 174 #endif
 175
 176         while (i < 16 && extern_memory < (CONFIG_SYS_MONITOR_BASE & CPLB_PAGE_MASK)) {
 177                 icplb_add(extern_memory, SDRAM_IGENERIC);
 178                 dcplb_add(extern_memory, SDRAM_DGENERIC);
 179                 extern_memory += CPLB_PAGE_SIZE;
 180                 ++i;
 181         }
 182         while (i < 16) {
 183                 icplb_add(0, 0);
 184                 dcplb_add(0, 0);
 185                 ++i;
 186         }
 187 }
 188
 189 /*
 190  * All attempts to come up with a "common" initialization sequence
 191  * that works for all boards and architectures failed: some of the
 192  * requirements are just _too_ different. To get rid of the resulting
 193  * mess of board dependend #ifdef'ed code we now make the whole
 194  * initialization sequence configurable to the user.
 195  *
 196  * The requirements for any new initalization function is simple: it
 197  * receives a pointer to the "global data" structure as it's only
 198  * argument, and returns an integer return code, where 0 means
 199  * "continue" and != 0 means "fatal error, hang the system".
 200  */
 201
 202 extern int watchdog_init(void);
 203 extern int exception_init(void);
 204 extern int irq_init(void);
 205 extern int timer_init(void);
 206
 207 void board_init_f(ulong bootflag)
 208 {
 209         ulong addr;
 210         bd_t *bd;
 211         char buf[32];
 212
 213 #ifdef CONFIG_BOARD_EARLY_INIT_F
 214         serial_early_puts("Board early init flash\n");
 215         board_early_init_f();
 216 #endif
 217
 218         serial_early_puts("Init CPLB tables\n");
 219         init_cplbtables();
 220
 221         serial_early_puts("Exceptions setup\n");
 222         exception_init();
 223
 224 #ifndef CONFIG_ICACHE_OFF
 225         serial_early_puts("Turn on ICACHE\n");
 226         icache_enable();
 227 #endif
 228 #ifndef CONFIG_DCACHE_OFF
 229         serial_early_puts("Turn on DCACHE\n");
 230         dcache_enable();
 231 #endif
 232
 233 #ifdef CONFIG_WATCHDOG
 234         serial_early_puts("Setting up external watchdog\n");
 235         watchdog_init();
 236 #endif
 237
 238 #ifdef DEBUG
 239         if (CONFIG_SYS_GBL_DATA_SIZE < sizeof(*gd))
 240                 hang();
 241 #endif
 242         serial_early_puts("Init global data\n");
 243         gd = (gd_t *) (CONFIG_SYS_GBL_DATA_ADDR);
 244         memset((void *)gd, 0, CONFIG_SYS_GBL_DATA_SIZE);
 245
 246         /* Board data initialization */
 247         addr = (CONFIG_SYS_GBL_DATA_ADDR + sizeof(gd_t));
 248
 249         /* Align to 4 byte boundary */
 250         addr &= ~(4 - 1);
 251         bd = (bd_t *) addr;
 252         gd->bd = bd;
 253         memset((void *)bd, 0, sizeof(bd_t));
 254
 255         bd->bi_r_version = version_string;
 256         bd->bi_cpu = MK_STR(CONFIG_BFIN_CPU);
 257         bd->bi_board_name = BFIN_BOARD_NAME;
 258         bd->bi_vco = get_vco();
 259         bd->bi_cclk = get_cclk();
 260         bd->bi_sclk = get_sclk();
 261         bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
 262         bd->bi_memsize = CONFIG_SYS_MAX_RAM_SIZE;
 263
 264         /* Initialize */
 265         serial_early_puts("IRQ init\n");
 266         irq_init();
 267         serial_early_puts("Environment init\n");
 268         env_init();
 269         serial_early_puts("Baudrate init\n");
 270         init_baudrate();
 271         serial_early_puts("Serial init\n");
 272         serial_init();
 273         serial_early_puts("Console init flash\n");
 274         console_init_f();
 275         serial_early_puts("End of early debugging\n");
 276         display_banner();
 277
 278         checkboard();
 279         timer_init();
 280
 281         printf("Clock: VCO: %s MHz, ", strmhz(buf, get_vco()));
 282         printf("Core: %s MHz, ", strmhz(buf, get_cclk()));
 283         printf("System: %s MHz\n", strmhz(buf, get_sclk()));
 284
 285         printf("RAM:   ");
 286         print_size(bd->bi_memsize, "\n");
 287 #if defined(CONFIG_POST)
 288         post_init_f();
 289         post_bootmode_init();
 290         post_run(NULL, POST_ROM | post_bootmode_get(0));
 291 #endif
 292
 293         board_init_r((gd_t *) gd, 0x20000010);
 294 }
 295
 296 static void board_net_init_r(bd_t *bd)
 297 {
 298 #ifdef CONFIG_BITBANGMII
 299         bb_miiphy_init();
 300 #endif
 301 #ifdef CONFIG_CMD_NET
 302         char *s;
 303
 304         if ((s = getenv("bootfile")) != NULL)
 305                 copy_filename(BootFile, s, sizeof(BootFile));
 306
 307         bd->bi_ip_addr = getenv_IPaddr("ipaddr");
 308
 309         printf("Net:   ");
 310         eth_initialize(gd->bd);
 311 #endif
 312 }
 313
 314 void board_init_r(gd_t * id, ulong dest_addr)
 315 {
 316         char *s;
 317         bd_t *bd;
 318         gd = id;
 319         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 320         bd = gd->bd;
 321
 322 #if defined(CONFIG_POST)
 323         post_output_backlog();
 324         post_reloc();
 325 #endif
 326
 327         /* initialize malloc() area */
 328         mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);
 329
 330 #if     !defined(CONFIG_SYS_NO_FLASH)
 331         /* Initialize the flash and protect u-boot by default */
 332         extern flash_info_t flash_info[];
 333         puts("Flash: ");
 334         ulong size = flash_init();
 335         print_size(size, "\n");
 336         flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_FLASH_BASE,
 337                 CONFIG_SYS_FLASH_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 338                 &flash_info[0]);
 339         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 340         bd->bi_flashsize = size;
 341         bd->bi_flashoffset = 0;
 342 #else
 343         bd->bi_flashstart = 0;
 344         bd->bi_flashsize = 0;
 345         bd->bi_flashoffset = 0;
 346 #endif
 347
 348 #ifdef CONFIG_CMD_NAND
 349         puts("NAND:  ");
 350         nand_init();            /* go init the NAND */
 351 #endif
 352
 353 #ifdef CONFIG_GENERIC_MMC
 354         puts("MMC:  ");
 355         mmc_initialize(bd);
 356 #endif
 357
 358         /* relocate environment function pointers etc. */
 359         env_relocate();
 360
 361         /* Initialize stdio devices */
 362         stdio_init();
 363         jumptable_init();
 364
 365         /* Initialize the console (after the relocation and devices init) */
 366         console_init_r();
 367
 368 #ifdef CONFIG_CMD_KGDB
 369         puts("KGDB:  ");
 370         kgdb_init();
 371 #endif
 372
 373 #ifdef CONFIG_STATUS_LED
 374         status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
 375         status_led_set(STATUS_LED_CRASH, STATUS_LED_OFF);
 376 #endif
 377
 378         /* Initialize from environment */
 379         if ((s = getenv("loadaddr")) != NULL)
 380                 load_addr = simple_strtoul(s, NULL, 16);
 381
 382 #if defined(CONFIG_MISC_INIT_R)
 383         /* miscellaneous platform dependent initialisations */
 384         misc_init_r();
 385 #endif
 386
 387         board_net_init_r(bd);
 388
 389         display_global_data();
 390
 391 #if defined(CONFIG_POST)
 392         if (post_flag)
 393                 post_run(NULL, POST_RAM | post_bootmode_get(0));
 394 #endif
 395
 396         if (bfin_os_log_check()) {
 397                 puts("\nLog buffer from operating system:\n");
 398                 bfin_os_log_dump();
 399                 puts("\n");
 400         }
 401
 402         /* main_loop() can return to retry autoboot, if so just run it again. */
 403         for (;;)
 404                 main_loop();
 405 }
 406
 407 void hang(void)
 408 {
 409 #ifdef CONFIG_STATUS_LED
 410         status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
 411         status_led_set(STATUS_LED_CRASH, STATUS_LED_BLINKING);
 412 #endif
 413         puts("### ERROR ### Please RESET the board ###\n");
 414         while (1)
 415                 /* If a JTAG emulator is hooked up, we'll automatically trigger
 416                  * a breakpoint in it.  If one isn't, this is just a NOP.
 417                  */
 418                 asm("emuexcpt;");
 419 }