arch/mips/lib/board.c

   1 /*
   2  * (C) Copyright 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <malloc.h>
  27 #include <stdio_dev.h>
  28 #include <version.h>
  29 #include <net.h>
  30 #include <environment.h>
  31 #include <nand.h>
  32 #include <onenand_uboot.h>
  33 #include <spi.h>
  34
  35 #ifdef CONFIG_BITBANGMII
  36 #include <miiphy.h>
  37 #endif
  38
  39 DECLARE_GLOBAL_DATA_PTR;
  40
  41 ulong monitor_flash_len;
  42
  43 static char *failed = "*** failed ***\n";
  44
  45 /*
  46  * mips_io_port_base is the begin of the address space to which x86 style
  47  * I/O ports are mapped.
  48  */
  49 unsigned long mips_io_port_base = -1;
  50
  51 int __board_early_init_f(void)
  52 {
  53         /*
  54          * Nothing to do in this dummy implementation
  55          */
  56         return 0;
  57 }
  58 int board_early_init_f(void)
  59         __attribute__((weak, alias("__board_early_init_f")));
  60
  61 static int init_func_ram(void)
  62 {
  63 #ifdef  CONFIG_BOARD_TYPES
  64         int board_type = gd->board_type;
  65 #else
  66         int board_type = 0;     /* use dummy arg */
  67 #endif
  68         puts("DRAM:  ");
  69
  70         gd->ram_size = initdram(board_type);
  71         if (gd->ram_size > 0) {
  72                 print_size(gd->ram_size, "\n");
  73                 return 0;
  74         }
  75         puts(failed);
  76         return 1;
  77 }
  78
  79 static int display_banner(void)
  80 {
  81
  82         printf("\n\n%s\n\n", version_string);
  83         return 0;
  84 }
  85
  86 #ifndef CONFIG_SYS_NO_FLASH
  87 static void display_flash_config(ulong size)
  88 {
  89         puts("Flash: ");
  90         print_size(size, "\n");
  91 }
  92 #endif
  93
  94 static int init_baudrate(void)
  95 {
  96         gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
  97         return 0;
  98 }
  99
 100
 101 /*
 102  * Breath some life into the board...
 103  *
 104  * The first part of initialization is running from Flash memory;
 105  * its main purpose is to initialize the RAM so that we
 106  * can relocate the monitor code to RAM.
 107  */
 108
 109 /*
 110  * All attempts to come up with a "common" initialization sequence
 111  * that works for all boards and architectures failed: some of the
 112  * requirements are just _too_ different. To get rid of the resulting
 113  * mess of board dependend #ifdef'ed code we now make the whole
 114  * initialization sequence configurable to the user.
 115  *
 116  * The requirements for any new initalization function is simple: it
 117  * receives a pointer to the "global data" structure as it's only
 118  * argument, and returns an integer return code, where 0 means
 119  * "continue" and != 0 means "fatal error, hang the system".
 120  */
 121 typedef int (init_fnc_t)(void);
 122
 123 init_fnc_t *init_sequence[] = {
 124         board_early_init_f,
 125         timer_init,
 126         env_init,               /* initialize environment */
 127 #ifdef CONFIG_INCA_IP
 128         incaip_set_cpuclk,      /* set cpu clock according to env. variable */
 129 #endif
 130         init_baudrate,          /* initialize baudrate settings */
 131         serial_init,            /* serial communications setup */
 132         console_init_f,
 133         display_banner,         /* say that we are here */
 134         checkboard,
 135         init_func_ram,
 136         NULL,
 137 };
 138
 139
 140 void board_init_f(ulong bootflag)
 141 {
 142         gd_t gd_data, *id;
 143         bd_t *bd;
 144         init_fnc_t **init_fnc_ptr;
 145         ulong addr, addr_sp, len = (ulong)&uboot_end - CONFIG_SYS_MONITOR_BASE;
 146         ulong *s;
 147
 148         /* Pointer is writable since we allocated a register for it.
 149          */
 150         gd = &gd_data;
 151         /* compiler optimization barrier needed for GCC >= 3.4 */
 152         __asm__ __volatile__("" : : : "memory");
 153
 154         memset((void *)gd, 0, sizeof(gd_t));
 155
 156         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 157                 if ((*init_fnc_ptr)() != 0)
 158                         hang();
 159         }
 160
 161         /*
 162          * Now that we have DRAM mapped and working, we can
 163          * relocate the code and continue running from DRAM.
 164          */
 165         addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
 166
 167         /* We can reserve some RAM "on top" here.
 168          */
 169
 170         /* round down to next 4 kB limit.
 171          */
 172         addr &= ~(4096 - 1);
 173         debug("Top of RAM usable for U-Boot at: %08lx\n", addr);
 174
 175         /* Reserve memory for U-Boot code, data & bss
 176          * round down to next 16 kB limit
 177          */
 178         addr -= len;
 179         addr &= ~(16 * 1024 - 1);
 180
 181         debug("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
 182
 183          /* Reserve memory for malloc() arena.
 184          */
 185         addr_sp = addr - TOTAL_MALLOC_LEN;
 186         debug("Reserving %dk for malloc() at: %08lx\n",
 187                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 188
 189         /*
 190          * (permanently) allocate a Board Info struct
 191          * and a permanent copy of the "global" data
 192          */
 193         addr_sp -= sizeof(bd_t);
 194         bd = (bd_t *)addr_sp;
 195         gd->bd = bd;
 196         debug("Reserving %zu Bytes for Board Info at: %08lx\n",
 197                         sizeof(bd_t), addr_sp);
 198
 199         addr_sp -= sizeof(gd_t);
 200         id = (gd_t *)addr_sp;
 201         debug("Reserving %zu Bytes for Global Data at: %08lx\n",
 202                         sizeof(gd_t), addr_sp);
 203
 204         /* Reserve memory for boot params.
 205          */
 206         addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
 207         bd->bi_boot_params = addr_sp;
 208         debug("Reserving %dk for boot params() at: %08lx\n",
 209                         CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
 210
 211         /*
 212          * Finally, we set up a new (bigger) stack.
 213          *
 214          * Leave some safety gap for SP, force alignment on 16 byte boundary
 215          * Clear initial stack frame
 216          */
 217         addr_sp -= 16;
 218         addr_sp &= ~0xF;
 219         s = (ulong *)addr_sp;
 220         *s-- = 0;
 221         *s-- = 0;
 222         addr_sp = (ulong)s;
 223         debug("Stack Pointer at: %08lx\n", addr_sp);
 224
 225         /*
 226          * Save local variables to board info struct
 227          */
 228         bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;        /* start of DRAM */
 229         bd->bi_memsize  = gd->ram_size;         /* size of DRAM in bytes */
 230         bd->bi_baudrate = gd->baudrate;         /* Console Baudrate */
 231
 232         memcpy(id, (void *)gd, sizeof(gd_t));
 233
 234         relocate_code(addr_sp, id, addr);
 235
 236         /* NOTREACHED - relocate_code() does not return */
 237 }
 238
 239 /*
 240  * This is the next part if the initialization sequence: we are now
 241  * running from RAM and have a "normal" C environment, i. e. global
 242  * data can be written, BSS has been cleared, the stack size in not
 243  * that critical any more, etc.
 244  */
 245
 246 void board_init_r(gd_t *id, ulong dest_addr)
 247 {
 248 #ifndef CONFIG_SYS_NO_FLASH
 249         ulong size;
 250 #endif
 251 #ifndef CONFIG_ENV_IS_NOWHERE
 252         extern char *env_name_spec;
 253 #endif
 254         bd_t *bd;
 255
 256         gd = id;
 257         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 258
 259         debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 260
 261         gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
 262
 263         monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
 264
 265 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 266         /*
 267          * We have to relocate the command table manually
 268          */
 269         fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
 270                         ll_entry_count(cmd_tbl_t, cmd));
 271 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
 272
 273         /* there are some other pointer constants we must deal with */
 274 #ifndef CONFIG_ENV_IS_NOWHERE
 275         env_name_spec += gd->reloc_off;
 276 #endif
 277
 278         bd = gd->bd;
 279
 280         /* The Malloc area is immediately below the monitor copy in DRAM */
 281         mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
 282                         TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
 283         malloc_bin_reloc();
 284
 285 #ifndef CONFIG_SYS_NO_FLASH
 286         /* configure available FLASH banks */
 287         size = flash_init();
 288         display_flash_config(size);
 289         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 290         bd->bi_flashsize = size;
 291
 292 #if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
 293         bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
 294 #else
 295         bd->bi_flashoffset = 0;
 296 #endif
 297 #else
 298         bd->bi_flashstart = 0;
 299         bd->bi_flashsize = 0;
 300         bd->bi_flashoffset = 0;
 301 #endif
 302
 303 #ifdef CONFIG_CMD_NAND
 304         puts("NAND:  ");
 305         nand_init();            /* go init the NAND */
 306 #endif
 307
 308 #if defined(CONFIG_CMD_ONENAND)
 309         onenand_init();
 310 #endif
 311
 312         /* relocate environment function pointers etc. */
 313         env_relocate();
 314
 315 #if defined(CONFIG_PCI)
 316         /*
 317          * Do pci configuration
 318          */
 319         pci_init();
 320 #endif
 321
 322 /** leave this here (after malloc(), environment and PCI are working) **/
 323         /* Initialize stdio devices */
 324         stdio_init();
 325
 326         jumptable_init();
 327
 328         /* Initialize the console (after the relocation and devices init) */
 329         console_init_r();
 330 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
 331
 332         /* Initialize from environment */
 333         load_addr = getenv_ulong("loadaddr", 16, load_addr);
 334
 335 #ifdef CONFIG_CMD_SPI
 336         puts("SPI:   ");
 337         spi_init();             /* go init the SPI */
 338         puts("ready\n");
 339 #endif
 340
 341 #if defined(CONFIG_MISC_INIT_R)
 342         /* miscellaneous platform dependent initialisations */
 343         misc_init_r();
 344 #endif
 345
 346 #ifdef CONFIG_BITBANGMII
 347         bb_miiphy_init();
 348 #endif
 349 #if defined(CONFIG_CMD_NET)
 350         puts("Net:   ");
 351         eth_initialize(gd->bd);
 352 #endif
 353
 354         /* main_loop() can return to retry autoboot, if so just run it again. */
 355         for (;;)
 356                 main_loop();
 357
 358         /* NOTREACHED - no way out of command loop except booting */
 359 }
 360
 361 void hang(void)
 362 {
 363         puts("### ERROR ### Please RESET the board ###\n");
 364         for (;;)
 365                 ;
 366 }