arch/blackfin/kernel/setup.c

   1 /*
   2  * File:         arch/blackfin/kernel/setup.c
   3  * Based on:
   4  * Author:
   5  *
   6  * Created:
   7  * Description:
   8  *
   9  * Modified:
  10  *               Copyright 2004-2006 Analog Devices Inc.
  11  *
  12  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, see the file COPYING, or write
  26  * to the Free Software Foundation, Inc.,
  27  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  28  */
  29
  30 #include <linux/delay.h>
  31 #include <linux/console.h>
  32 #include <linux/bootmem.h>
  33 #include <linux/seq_file.h>
  34 #include <linux/cpu.h>
  35 #include <linux/module.h>
  36 #include <linux/tty.h>
  37
  38 #include <linux/ext2_fs.h>
  39 #include <linux/cramfs_fs.h>
  40 #include <linux/romfs_fs.h>
  41
  42 #include <asm/cacheflush.h>
  43 #include <asm/blackfin.h>
  44 #include <asm/cplbinit.h>
  45
  46 u16 _bfin_swrst;
  47
  48 unsigned long memory_start, memory_end, physical_mem_end;
  49 unsigned long reserved_mem_dcache_on;
  50 unsigned long reserved_mem_icache_on;
  51 EXPORT_SYMBOL(memory_start);
  52 EXPORT_SYMBOL(memory_end);
  53 EXPORT_SYMBOL(physical_mem_end);
  54 EXPORT_SYMBOL(_ramend);
  55
  56 #ifdef CONFIG_MTD_UCLINUX
  57 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
  58 unsigned long _ebss;
  59 EXPORT_SYMBOL(memory_mtd_end);
  60 EXPORT_SYMBOL(memory_mtd_start);
  61 EXPORT_SYMBOL(mtd_size);
  62 #endif
  63
  64 char __initdata command_line[COMMAND_LINE_SIZE];
  65
  66 #if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
  67 static void generate_cpl_tables(void);
  68 #endif
  69
  70 void __init bf53x_cache_init(void)
  71 {
  72 #if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
  73         generate_cpl_tables();
  74 #endif
  75
  76 #ifdef CONFIG_BLKFIN_CACHE
  77         bfin_icache_init();
  78         printk(KERN_INFO "Instruction Cache Enabled\n");
  79 #endif
  80
  81 #ifdef CONFIG_BLKFIN_DCACHE
  82         bfin_dcache_init();
  83         printk(KERN_INFO "Data Cache Enabled"
  84 # if defined CONFIG_BLKFIN_WB
  85                 " (write-back)"
  86 # elif defined CONFIG_BLKFIN_WT
  87                 " (write-through)"
  88 # endif
  89                 "\n");
  90 #endif
  91 }
  92
  93 void __init bf53x_relocate_l1_mem(void)
  94 {
  95         unsigned long l1_code_length;
  96         unsigned long l1_data_a_length;
  97         unsigned long l1_data_b_length;
  98
  99         l1_code_length = _etext_l1 - _stext_l1;
 100         if (l1_code_length > L1_CODE_LENGTH)
 101                 l1_code_length = L1_CODE_LENGTH;
 102         /* cannot complain as printk is not available as yet.
 103          * But we can continue booting and complain later!
 104          */
 105
 106         /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
 107         dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
 108
 109         l1_data_a_length = _ebss_l1 - _sdata_l1;
 110         if (l1_data_a_length > L1_DATA_A_LENGTH)
 111                 l1_data_a_length = L1_DATA_A_LENGTH;
 112
 113         /* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */
 114         dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);
 115
 116         l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;
 117         if (l1_data_b_length > L1_DATA_B_LENGTH)
 118                 l1_data_b_length = L1_DATA_B_LENGTH;
 119
 120         /* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */
 121         dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
 122                         l1_data_a_length, l1_data_b_length);
 123
 124 }
 125
 126 /*
 127  * Initial parsing of the command line.  Currently, we support:
 128  *  - Controlling the linux memory size: mem=xxx[KMG]
 129  *  - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
 130  *       $ -> reserved memory is dcacheable
 131  *       # -> reserved memory is icacheable
 132  */
 133 static __init void parse_cmdline_early(char *cmdline_p)
 134 {
 135         char c = ' ', *to = cmdline_p;
 136         unsigned int memsize;
 137         for (;;) {
 138                 if (c == ' ') {
 139
 140                         if (!memcmp(to, "mem=", 4)) {
 141                                 to += 4;
 142                                 memsize = memparse(to, &to);
 143                                 if (memsize)
 144                                         _ramend = memsize;
 145
 146                         } else if (!memcmp(to, "max_mem=", 8)) {
 147                                 to += 8;
 148                                 memsize = memparse(to, &to);
 149                                 if (memsize) {
 150                                         physical_mem_end = memsize;
 151                                         if (*to != ' ') {
 152                                                 if (*to == '$'
 153                                                     || *(to + 1) == '$')
 154                                                         reserved_mem_dcache_on =
 155                                                             1;
 156                                                 if (*to == '#'
 157                                                     || *(to + 1) == '#')
 158                                                         reserved_mem_icache_on =
 159                                                             1;
 160                                         }
 161                                 }
 162                         }
 163
 164                 }
 165                 c = *(to++);
 166                 if (!c)
 167                         break;
 168         }
 169 }
 170
 171 void __init setup_arch(char **cmdline_p)
 172 {
 173         int bootmap_size;
 174         unsigned long l1_length, sclk, cclk;
 175 #ifdef CONFIG_MTD_UCLINUX
 176         unsigned long mtd_phys = 0;
 177 #endif
 178
 179 #ifdef CONFIG_DUMMY_CONSOLE
 180         conswitchp = &dummy_con;
 181 #endif
 182         cclk = get_cclk();
 183         sclk = get_sclk();
 184
 185 #if !defined(CONFIG_BFIN_KERNEL_CLOCK) && defined(ANOMALY_05000273)
 186         if (cclk == sclk)
 187                 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
 188 #endif
 189
 190 #if defined(ANOMALY_05000266)
 191         bfin_read_IMDMA_D0_IRQ_STATUS();
 192         bfin_read_IMDMA_D1_IRQ_STATUS();
 193 #endif
 194
 195 #ifdef DEBUG_SERIAL_EARLY_INIT
 196         bfin_console_init();    /* early console registration */
 197         /* this give a chance to get printk() working before crash. */
 198 #endif
 199
 200 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
 201         /* we need to initialize the Flashrom device here since we might
 202          * do things with flash early on in the boot
 203          */
 204         flash_probe();
 205 #endif
 206
 207 #if defined(CONFIG_CMDLINE_BOOL)
 208         strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
 209         command_line[sizeof(command_line) - 1] = 0;
 210 #endif
 211
 212         /* Keep a copy of command line */
 213         *cmdline_p = &command_line[0];
 214         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 215         boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
 216
 217         /* setup memory defaults from the user config */
 218         physical_mem_end = 0;
 219         _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
 220
 221         parse_cmdline_early(&command_line[0]);
 222
 223         if (physical_mem_end == 0)
 224                 physical_mem_end = _ramend;
 225
 226         /* by now the stack is part of the init task */
 227         memory_end = _ramend - DMA_UNCACHED_REGION;
 228
 229         _ramstart = (unsigned long)__bss_stop;
 230         memory_start = PAGE_ALIGN(_ramstart);
 231
 232 #if defined(CONFIG_MTD_UCLINUX)
 233         /* generic memory mapped MTD driver */
 234         memory_mtd_end = memory_end;
 235
 236         mtd_phys = _ramstart;
 237         mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
 238
 239 # if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
 240         if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
 241                 mtd_size =
 242                     PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
 243 # endif
 244
 245 # if defined(CONFIG_CRAMFS)
 246         if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
 247                 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
 248 # endif
 249
 250 # if defined(CONFIG_ROMFS_FS)
 251         if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
 252             && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
 253                 mtd_size =
 254                     PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
 255 #  if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
 256         /* Due to a Hardware Anomaly we need to limit the size of usable
 257          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
 258          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
 259          */
 260 #   if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
 261         if (memory_end >= 56 * 1024 * 1024)
 262                 memory_end = 56 * 1024 * 1024;
 263 #   else
 264         if (memory_end >= 60 * 1024 * 1024)
 265                 memory_end = 60 * 1024 * 1024;
 266 #   endif                               /* CONFIG_DEBUG_HUNT_FOR_ZERO */
 267 #  endif                                /* ANOMALY_05000263 */
 268 # endif                         /* CONFIG_ROMFS_FS */
 269
 270         memory_end -= mtd_size;
 271
 272         if (mtd_size == 0) {
 273                 console_init();
 274                 panic("Don't boot kernel without rootfs attached.\n");
 275         }
 276
 277         /* Relocate MTD image to the top of memory after the uncached memory area */
 278         dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
 279
 280         memory_mtd_start = memory_end;
 281         _ebss = memory_mtd_start;       /* define _ebss for compatible */
 282 #endif                          /* CONFIG_MTD_UCLINUX */
 283
 284 #if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
 285         /* Due to a Hardware Anomaly we need to limit the size of usable
 286          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
 287          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
 288          */
 289 #if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
 290         if (memory_end >= 56 * 1024 * 1024)
 291                 memory_end = 56 * 1024 * 1024;
 292 #else
 293         if (memory_end >= 60 * 1024 * 1024)
 294                 memory_end = 60 * 1024 * 1024;
 295 #endif                          /* CONFIG_DEBUG_HUNT_FOR_ZERO */
 296         printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
 297 #endif                          /* ANOMALY_05000263 */
 298
 299 #if !defined(CONFIG_MTD_UCLINUX)
 300         memory_end -= SIZE_4K; /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
 301 #endif
 302         init_mm.start_code = (unsigned long)_stext;
 303         init_mm.end_code = (unsigned long)_etext;
 304         init_mm.end_data = (unsigned long)_edata;
 305         init_mm.brk = (unsigned long)0;
 306
 307         init_leds();
 308
 309         printk(KERN_INFO "Blackfin support (C) 2004-2007 Analog Devices, Inc.\n");
 310         if (bfin_compiled_revid() == 0xffff)
 311                 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
 312         else if (bfin_compiled_revid() == -1)
 313                 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
 314         else
 315                 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
 316         if (bfin_revid() != bfin_compiled_revid()) {
 317                 if (bfin_compiled_revid() == -1)
 318                         printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
 319                                bfin_revid());
 320                 else if (bfin_compiled_revid() != 0xffff)
 321                         printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
 322                                bfin_compiled_revid(), bfin_revid());
 323         }
 324         if (bfin_revid() < SUPPORTED_REVID)
 325                 printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
 326                        CPU, bfin_revid());
 327         printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
 328
 329         printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu Mhz System Clock\n",
 330                cclk / 1000000,  sclk / 1000000);
 331
 332 #if defined(ANOMALY_05000273)
 333         if ((cclk >> 1) <= sclk)
 334                 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
 335 #endif
 336
 337         printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
 338         printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
 339
 340         printk(KERN_INFO "Memory map:\n"
 341                KERN_INFO "  text      = 0x%p-0x%p\n"
 342                KERN_INFO "  rodata    = 0x%p-0x%p\n"
 343                KERN_INFO "  data      = 0x%p-0x%p\n"
 344                KERN_INFO "    stack   = 0x%p-0x%p\n"
 345                KERN_INFO "  init      = 0x%p-0x%p\n"
 346                KERN_INFO "  bss       = 0x%p-0x%p\n"
 347                KERN_INFO "  available = 0x%p-0x%p\n"
 348 #ifdef CONFIG_MTD_UCLINUX
 349                KERN_INFO "  rootfs    = 0x%p-0x%p\n"
 350 #endif
 351 #if DMA_UNCACHED_REGION > 0
 352                KERN_INFO "  DMA Zone  = 0x%p-0x%p\n"
 353 #endif
 354                , _stext, _etext,
 355                __start_rodata, __end_rodata,
 356                _sdata, _edata,
 357                (void*)&init_thread_union, (void*)((int)(&init_thread_union) + 0x2000),
 358                __init_begin, __init_end,
 359                __bss_start, __bss_stop,
 360                (void*)_ramstart, (void*)memory_end
 361 #ifdef CONFIG_MTD_UCLINUX
 362                , (void*)memory_mtd_start, (void*)(memory_mtd_start + mtd_size)
 363 #endif
 364 #if DMA_UNCACHED_REGION > 0
 365                , (void*)(_ramend - DMA_UNCACHED_REGION), (void*)(_ramend)
 366 #endif
 367                );
 368
 369         /*
 370          * give all the memory to the bootmap allocator,  tell it to put the
 371          * boot mem_map at the start of memory
 372          */
 373         bootmap_size = init_bootmem_node(NODE_DATA(0), memory_start >> PAGE_SHIFT,      /* map goes here */
 374                                          PAGE_OFFSET >> PAGE_SHIFT,
 375                                          memory_end >> PAGE_SHIFT);
 376         /*
 377          * free the usable memory,  we have to make sure we do not free
 378          * the bootmem bitmap so we then reserve it after freeing it :-)
 379          */
 380         free_bootmem(memory_start, memory_end - memory_start);
 381
 382         reserve_bootmem(memory_start, bootmap_size);
 383         /*
 384          * get kmalloc into gear
 385          */
 386         paging_init();
 387
 388         /* check the size of the l1 area */
 389         l1_length = _etext_l1 - _stext_l1;
 390         if (l1_length > L1_CODE_LENGTH)
 391                 panic("L1 memory overflow\n");
 392
 393         l1_length = _ebss_l1 - _sdata_l1;
 394         if (l1_length > L1_DATA_A_LENGTH)
 395                 panic("L1 memory overflow\n");
 396
 397 #ifdef BF561_FAMILY
 398         _bfin_swrst = bfin_read_SICA_SWRST();
 399 #else
 400         _bfin_swrst = bfin_read_SWRST();
 401 #endif
 402
 403         bf53x_cache_init();
 404
 405         printk(KERN_INFO "Hardware Trace Enabled\n");
 406         bfin_write_TBUFCTL(0x03);
 407 }
 408
 409 static int __init topology_init(void)
 410 {
 411 #if defined (CONFIG_BF561)
 412         static struct cpu cpu[2];
 413         register_cpu(&cpu[0], 0);
 414         register_cpu(&cpu[1], 1);
 415         return 0;
 416 #else
 417         static struct cpu cpu[1];
 418         return register_cpu(cpu, 0);
 419 #endif
 420 }
 421
 422 subsys_initcall(topology_init);
 423
 424 #if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
 425 static u16 __init lock_kernel_check(u32 start, u32 end)
 426 {
 427         if ((start <= (u32) _stext && end >= (u32) _end)
 428             || (start >= (u32) _stext && end <= (u32) _end))
 429                 return IN_KERNEL;
 430         return 0;
 431 }
 432
 433 static unsigned short __init
 434 fill_cplbtab(struct cplb_tab *table,
 435              unsigned long start, unsigned long end,
 436              unsigned long block_size, unsigned long cplb_data)
 437 {
 438         int i;
 439
 440         switch (block_size) {
 441         case SIZE_4M:
 442                 i = 3;
 443                 break;
 444         case SIZE_1M:
 445                 i = 2;
 446                 break;
 447         case SIZE_4K:
 448                 i = 1;
 449                 break;
 450         case SIZE_1K:
 451         default:
 452                 i = 0;
 453                 break;
 454         }
 455
 456         cplb_data = (cplb_data & ~(3 << 16)) | (i << 16);
 457
 458         while ((start < end) && (table->pos < table->size)) {
 459
 460                 table->tab[table->pos++] = start;
 461
 462                 if (lock_kernel_check(start, start + block_size) == IN_KERNEL)
 463                         table->tab[table->pos++] =
 464                             cplb_data | CPLB_LOCK | CPLB_DIRTY;
 465                 else
 466                         table->tab[table->pos++] = cplb_data;
 467
 468                 start += block_size;
 469         }
 470         return 0;
 471 }
 472
 473 static unsigned short __init
 474 close_cplbtab(struct cplb_tab *table)
 475 {
 476
 477         while (table->pos < table->size) {
 478
 479                 table->tab[table->pos++] = 0;
 480                 table->tab[table->pos++] = 0; /* !CPLB_VALID */
 481         }
 482         return 0;
 483 }
 484
 485 /* helper function */
 486 static void __fill_code_cplbtab(struct cplb_tab *t, int i,
 487                                 u32 a_start, u32 a_end)
 488 {
 489         if (cplb_data[i].psize) {
 490                 fill_cplbtab(t,
 491                                 cplb_data[i].start,
 492                                 cplb_data[i].end,
 493                                 cplb_data[i].psize,
 494                                 cplb_data[i].i_conf);
 495         } else {
 496 #if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
 497                 if (i == SDRAM_KERN) {
 498                         fill_cplbtab(t,
 499                                         cplb_data[i].start,
 500                                         cplb_data[i].end,
 501                                         SIZE_4M,
 502                                         cplb_data[i].i_conf);
 503                 } else {
 504 #endif
 505                         fill_cplbtab(t,
 506                                         cplb_data[i].start,
 507                                         a_start,
 508                                         SIZE_1M,
 509                                         cplb_data[i].i_conf);
 510                         fill_cplbtab(t,
 511                                         a_start,
 512                                         a_end,
 513                                         SIZE_4M,
 514                                         cplb_data[i].i_conf);
 515                         fill_cplbtab(t, a_end,
 516                                         cplb_data[i].end,
 517                                         SIZE_1M,
 518                                         cplb_data[i].i_conf);
 519                 }
 520         }
 521 }
 522
 523 static void __fill_data_cplbtab(struct cplb_tab *t, int i,
 524                                 u32 a_start, u32 a_end)
 525 {
 526         if (cplb_data[i].psize) {
 527                 fill_cplbtab(t,
 528                                 cplb_data[i].start,
 529                                 cplb_data[i].end,
 530                                 cplb_data[i].psize,
 531                                 cplb_data[i].d_conf);
 532         } else {
 533                 fill_cplbtab(t,
 534                                 cplb_data[i].start,
 535                                 a_start, SIZE_1M,
 536                                 cplb_data[i].d_conf);
 537                 fill_cplbtab(t, a_start,
 538                                 a_end, SIZE_4M,
 539                                 cplb_data[i].d_conf);
 540                 fill_cplbtab(t, a_end,
 541                                 cplb_data[i].end,
 542                                 SIZE_1M,
 543                                 cplb_data[i].d_conf);
 544         }
 545 }
 546 static void __init generate_cpl_tables(void)
 547 {
 548
 549         u16 i, j, process;
 550         u32 a_start, a_end, as, ae, as_1m;
 551
 552         struct cplb_tab *t_i = NULL;
 553         struct cplb_tab *t_d = NULL;
 554         struct s_cplb cplb;
 555
 556         cplb.init_i.size = MAX_CPLBS;
 557         cplb.init_d.size = MAX_CPLBS;
 558         cplb.switch_i.size = MAX_SWITCH_I_CPLBS;
 559         cplb.switch_d.size = MAX_SWITCH_D_CPLBS;
 560
 561         cplb.init_i.pos = 0;
 562         cplb.init_d.pos = 0;
 563         cplb.switch_i.pos = 0;
 564         cplb.switch_d.pos = 0;
 565
 566         cplb.init_i.tab = icplb_table;
 567         cplb.init_d.tab = dcplb_table;
 568         cplb.switch_i.tab = ipdt_table;
 569         cplb.switch_d.tab = dpdt_table;
 570
 571         cplb_data[SDRAM_KERN].end = memory_end;
 572
 573 #ifdef CONFIG_MTD_UCLINUX
 574         cplb_data[SDRAM_RAM_MTD].start = memory_mtd_start;
 575         cplb_data[SDRAM_RAM_MTD].end = memory_mtd_start + mtd_size;
 576         cplb_data[SDRAM_RAM_MTD].valid = mtd_size > 0;
 577 # if defined(CONFIG_ROMFS_FS)
 578         cplb_data[SDRAM_RAM_MTD].attr |= I_CPLB;
 579
 580         /*
 581          * The ROMFS_FS size is often not multiple of 1MB.
 582          * This can cause multiple CPLB sets covering the same memory area.
 583          * This will then cause multiple CPLB hit exceptions.
 584          * Workaround: We ensure a contiguous memory area by extending the kernel
 585          * memory section over the mtd section.
 586          * For ROMFS_FS memory must be covered with ICPLBs anyways.
 587          * So there is no difference between kernel and mtd memory setup.
 588          */
 589
 590         cplb_data[SDRAM_KERN].end = memory_mtd_start + mtd_size;;
 591         cplb_data[SDRAM_RAM_MTD].valid = 0;
 592
 593 # endif
 594 #else
 595         cplb_data[SDRAM_RAM_MTD].valid = 0;
 596 #endif
 597
 598         cplb_data[SDRAM_DMAZ].start = _ramend - DMA_UNCACHED_REGION;
 599         cplb_data[SDRAM_DMAZ].end = _ramend;
 600
 601         cplb_data[RES_MEM].start = _ramend;
 602         cplb_data[RES_MEM].end = physical_mem_end;
 603
 604         if (reserved_mem_dcache_on)
 605                 cplb_data[RES_MEM].d_conf = SDRAM_DGENERIC;
 606         else
 607                 cplb_data[RES_MEM].d_conf = SDRAM_DNON_CHBL;
 608
 609         if (reserved_mem_icache_on)
 610                 cplb_data[RES_MEM].i_conf = SDRAM_IGENERIC;
 611         else
 612                 cplb_data[RES_MEM].i_conf = SDRAM_INON_CHBL;
 613
 614         for (i = ZERO_P; i <= L2_MEM; i++) {
 615                 if (!cplb_data[i].valid)
 616                         continue;
 617
 618                 as_1m = cplb_data[i].start % SIZE_1M;
 619
 620                 /*
 621                  * We need to make sure all sections are properly 1M aligned
 622                  * However between Kernel Memory and the Kernel mtd section,
 623                  * depending on the rootfs size, there can be overlapping
 624                  * memory areas.
 625                  */
 626
 627                 if (as_1m && i != L1I_MEM && i != L1D_MEM) {
 628 #ifdef CONFIG_MTD_UCLINUX
 629                         if (i == SDRAM_RAM_MTD) {
 630                                 if ((cplb_data[SDRAM_KERN].end + 1) >
 631                                                 cplb_data[SDRAM_RAM_MTD].start)
 632                                         cplb_data[SDRAM_RAM_MTD].start =
 633                                                 (cplb_data[i].start &
 634                                                  (-2*SIZE_1M)) + SIZE_1M;
 635                                 else
 636                                         cplb_data[SDRAM_RAM_MTD].start =
 637                                                 (cplb_data[i].start &
 638                                                  (-2*SIZE_1M));
 639                         } else
 640 #endif
 641                                 printk(KERN_WARNING
 642                                         "Unaligned Start of %s at 0x%X\n",
 643                                         cplb_data[i].name, cplb_data[i].start);
 644                 }
 645
 646                 as = cplb_data[i].start % SIZE_4M;
 647                 ae = cplb_data[i].end % SIZE_4M;
 648
 649                 if (as)
 650                         a_start = cplb_data[i].start + (SIZE_4M - (as));
 651                 else
 652                         a_start = cplb_data[i].start;
 653
 654                 a_end = cplb_data[i].end - ae;
 655
 656                 for (j = INITIAL_T; j <= SWITCH_T; j++) {
 657
 658                         switch (j) {
 659                         case INITIAL_T:
 660                                 if (cplb_data[i].attr & INITIAL_T) {
 661                                         t_i = &cplb.init_i;
 662                                         t_d = &cplb.init_d;
 663                                         process = 1;
 664                                 } else
 665                                         process = 0;
 666                                 break;
 667                         case SWITCH_T:
 668                                 if (cplb_data[i].attr & SWITCH_T) {
 669                                         t_i = &cplb.switch_i;
 670                                         t_d = &cplb.switch_d;
 671                                         process = 1;
 672                                 } else
 673                                         process = 0;
 674                                 break;
 675                         default:
 676                                         process = 0;
 677                                 break;
 678                         }
 679
 680                         if (!process)
 681                                 continue;
 682                         if (cplb_data[i].attr & I_CPLB)
 683                                 __fill_code_cplbtab(t_i, i, a_start, a_end);
 684
 685                         if (cplb_data[i].attr & D_CPLB)
 686                                 __fill_data_cplbtab(t_d, i, a_start, a_end);
 687                 }
 688         }
 689
 690 /* close tables */
 691
 692         close_cplbtab(&cplb.init_i);
 693         close_cplbtab(&cplb.init_d);
 694
 695         cplb.init_i.tab[cplb.init_i.pos] = -1;
 696         cplb.init_d.tab[cplb.init_d.pos] = -1;
 697         cplb.switch_i.tab[cplb.switch_i.pos] = -1;
 698         cplb.switch_d.tab[cplb.switch_d.pos] = -1;
 699
 700 }
 701
 702 #endif
 703
 704 static u_long get_vco(void)
 705 {
 706         u_long msel;
 707         u_long vco;
 708
 709         msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
 710         if (0 == msel)
 711                 msel = 64;
 712
 713         vco = CONFIG_CLKIN_HZ;
 714         vco >>= (1 & bfin_read_PLL_CTL());      /* DF bit */
 715         vco = msel * vco;
 716         return vco;
 717 }
 718
 719 /*Get the Core clock*/
 720 u_long get_cclk(void)
 721 {
 722         u_long csel, ssel;
 723         if (bfin_read_PLL_STAT() & 0x1)
 724                 return CONFIG_CLKIN_HZ;
 725
 726         ssel = bfin_read_PLL_DIV();
 727         csel = ((ssel >> 4) & 0x03);
 728         ssel &= 0xf;
 729         if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
 730                 return get_vco() / ssel;
 731         return get_vco() >> csel;
 732 }
 733
 734 EXPORT_SYMBOL(get_cclk);
 735
 736 /* Get the System clock */
 737 u_long get_sclk(void)
 738 {
 739         u_long ssel;
 740
 741         if (bfin_read_PLL_STAT() & 0x1)
 742                 return CONFIG_CLKIN_HZ;
 743
 744         ssel = (bfin_read_PLL_DIV() & 0xf);
 745         if (0 == ssel) {
 746                 printk(KERN_WARNING "Invalid System Clock\n");
 747                 ssel = 1;
 748         }
 749
 750         return get_vco() / ssel;
 751 }
 752
 753 EXPORT_SYMBOL(get_sclk);
 754
 755 /*
 756  *      Get CPU information for use by the procfs.
 757  */
 758 static int show_cpuinfo(struct seq_file *m, void *v)
 759 {
 760         char *cpu, *mmu, *fpu, *name;
 761         uint32_t revid;
 762
 763         u_long cclk = 0, sclk = 0;
 764         u_int dcache_size = 0, dsup_banks = 0;
 765
 766         cpu = CPU;
 767         mmu = "none";
 768         fpu = "none";
 769         revid = bfin_revid();
 770         name = bfin_board_name;
 771
 772         cclk = get_cclk();
 773         sclk = get_sclk();
 774
 775         seq_printf(m, "CPU:\t\tADSP-%s Rev. 0.%d\n"
 776                    "MMU:\t\t%s\n"
 777                    "FPU:\t\t%s\n"
 778                    "Core Clock:\t%9lu Hz\n"
 779                    "System Clock:\t%9lu Hz\n"
 780                    "BogoMips:\t%lu.%02lu\n"
 781                    "Calibration:\t%lu loops\n",
 782                    cpu, revid, mmu, fpu,
 783                    cclk,
 784                    sclk,
 785                    (loops_per_jiffy * HZ) / 500000,
 786                    ((loops_per_jiffy * HZ) / 5000) % 100,
 787                    (loops_per_jiffy * HZ));
 788         seq_printf(m, "Board Name:\t%s\n", name);
 789         seq_printf(m, "Board Memory:\t%ld MB\n", physical_mem_end >> 20);
 790         seq_printf(m, "Kernel Memory:\t%ld MB\n", (unsigned long)_ramend >> 20);
 791         if (bfin_read_IMEM_CONTROL() & (ENICPLB | IMC))
 792                 seq_printf(m, "I-CACHE:\tON\n");
 793         else
 794                 seq_printf(m, "I-CACHE:\tOFF\n");
 795         if ((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE))
 796                 seq_printf(m, "D-CACHE:\tON"
 797 #if defined CONFIG_BLKFIN_WB
 798                            " (write-back)"
 799 #elif defined CONFIG_BLKFIN_WT
 800                            " (write-through)"
 801 #endif
 802                            "\n");
 803         else
 804                 seq_printf(m, "D-CACHE:\tOFF\n");
 805
 806
 807         switch(bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
 808                 case ACACHE_BSRAM:
 809                         seq_printf(m, "DBANK-A:\tCACHE\n" "DBANK-B:\tSRAM\n");
 810                         dcache_size = 16;
 811                         dsup_banks = 1;
 812                         break;
 813                 case ACACHE_BCACHE:
 814                         seq_printf(m, "DBANK-A:\tCACHE\n" "DBANK-B:\tCACHE\n");
 815                         dcache_size = 32;
 816                         dsup_banks = 2;
 817                         break;
 818                 case ASRAM_BSRAM:
 819                         seq_printf(m, "DBANK-A:\tSRAM\n" "DBANK-B:\tSRAM\n");
 820                         dcache_size = 0;
 821                         dsup_banks = 0;
 822                         break;
 823                 default:
 824                 break;
 825         }
 826
 827
 828         seq_printf(m, "I-CACHE Size:\t%dKB\n", BLKFIN_ICACHESIZE / 1024);
 829         seq_printf(m, "D-CACHE Size:\t%dKB\n", dcache_size);
 830         seq_printf(m, "I-CACHE Setup:\t%d Sub-banks/%d Ways, %d Lines/Way\n",
 831                    BLKFIN_ISUBBANKS, BLKFIN_IWAYS, BLKFIN_ILINES);
 832         seq_printf(m,
 833                    "D-CACHE Setup:\t%d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
 834                    dsup_banks, BLKFIN_DSUBBANKS, BLKFIN_DWAYS,
 835                    BLKFIN_DLINES);
 836 #ifdef CONFIG_BLKFIN_CACHE_LOCK
 837         switch (read_iloc()) {
 838         case WAY0_L:
 839                 seq_printf(m, "Way0 Locked-Down\n");
 840                 break;
 841         case WAY1_L:
 842                 seq_printf(m, "Way1 Locked-Down\n");
 843                 break;
 844         case WAY01_L:
 845                 seq_printf(m, "Way0,Way1 Locked-Down\n");
 846                 break;
 847         case WAY2_L:
 848                 seq_printf(m, "Way2 Locked-Down\n");
 849                 break;
 850         case WAY02_L:
 851                 seq_printf(m, "Way0,Way2 Locked-Down\n");
 852                 break;
 853         case WAY12_L:
 854                 seq_printf(m, "Way1,Way2 Locked-Down\n");
 855                 break;
 856         case WAY012_L:
 857                 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
 858                 break;
 859         case WAY3_L:
 860                 seq_printf(m, "Way3 Locked-Down\n");
 861                 break;
 862         case WAY03_L:
 863                 seq_printf(m, "Way0,Way3 Locked-Down\n");
 864                 break;
 865         case WAY13_L:
 866                 seq_printf(m, "Way1,Way3 Locked-Down\n");
 867                 break;
 868         case WAY013_L:
 869                 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
 870                 break;
 871         case WAY32_L:
 872                 seq_printf(m, "Way3,Way2 Locked-Down\n");
 873                 break;
 874         case WAY320_L:
 875                 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
 876                 break;
 877         case WAY321_L:
 878                 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
 879                 break;
 880         case WAYALL_L:
 881                 seq_printf(m, "All Ways are locked\n");
 882                 break;
 883         default:
 884                 seq_printf(m, "No Ways are locked\n");
 885         }
 886 #endif
 887         return 0;
 888 }
 889
 890 static void *c_start(struct seq_file *m, loff_t *pos)
 891 {
 892         return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
 893 }
 894
 895 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 896 {
 897         ++*pos;
 898         return c_start(m, pos);
 899 }
 900
 901 static void c_stop(struct seq_file *m, void *v)
 902 {
 903 }
 904
 905 struct seq_operations cpuinfo_op = {
 906         .start = c_start,
 907         .next = c_next,
 908         .stop = c_stop,
 909         .show = show_cpuinfo,
 910 };
 911
 912 void __init cmdline_init(const char *r0)
 913 {
 914         if (r0)
 915                 strncpy(command_line, r0, COMMAND_LINE_SIZE);
 916 }