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