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 #include <asm/fixed_code.h>
  46
  47 u16 _bfin_swrst;
  48
  49 unsigned long memory_start, memory_end, physical_mem_end;
  50 unsigned long reserved_mem_dcache_on;
  51 unsigned long reserved_mem_icache_on;
  52 EXPORT_SYMBOL(memory_start);
  53 EXPORT_SYMBOL(memory_end);
  54 EXPORT_SYMBOL(physical_mem_end);
  55 EXPORT_SYMBOL(_ramend);
  56
  57 #ifdef CONFIG_MTD_UCLINUX
  58 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
  59 unsigned long _ebss;
  60 EXPORT_SYMBOL(memory_mtd_end);
  61 EXPORT_SYMBOL(memory_mtd_start);
  62 EXPORT_SYMBOL(mtd_size);
  63 #endif
  64
  65 char __initdata command_line[COMMAND_LINE_SIZE];
  66
  67 void __init bf53x_cache_init(void)
  68 {
  69 #if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
  70         generate_cpl_tables();
  71 #endif
  72
  73 #ifdef CONFIG_BLKFIN_CACHE
  74         bfin_icache_init();
  75         printk(KERN_INFO "Instruction Cache Enabled\n");
  76 #endif
  77
  78 #ifdef CONFIG_BLKFIN_DCACHE
  79         bfin_dcache_init();
  80         printk(KERN_INFO "Data Cache Enabled"
  81 # if defined CONFIG_BLKFIN_WB
  82                 " (write-back)"
  83 # elif defined CONFIG_BLKFIN_WT
  84                 " (write-through)"
  85 # endif
  86                 "\n");
  87 #endif
  88 }
  89
  90 void __init bf53x_relocate_l1_mem(void)
  91 {
  92         unsigned long l1_code_length;
  93         unsigned long l1_data_a_length;
  94         unsigned long l1_data_b_length;
  95
  96         l1_code_length = _etext_l1 - _stext_l1;
  97         if (l1_code_length > L1_CODE_LENGTH)
  98                 l1_code_length = L1_CODE_LENGTH;
  99         /* cannot complain as printk is not available as yet.
 100          * But we can continue booting and complain later!
 101          */
 102
 103         /* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
 104         dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
 105
 106         l1_data_a_length = _ebss_l1 - _sdata_l1;
 107         if (l1_data_a_length > L1_DATA_A_LENGTH)
 108                 l1_data_a_length = L1_DATA_A_LENGTH;
 109
 110         /* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */
 111         dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);
 112
 113         l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;
 114         if (l1_data_b_length > L1_DATA_B_LENGTH)
 115                 l1_data_b_length = L1_DATA_B_LENGTH;
 116
 117         /* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */
 118         dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
 119                         l1_data_a_length, l1_data_b_length);
 120
 121 }
 122
 123 /*
 124  * Initial parsing of the command line.  Currently, we support:
 125  *  - Controlling the linux memory size: mem=xxx[KMG]
 126  *  - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
 127  *       $ -> reserved memory is dcacheable
 128  *       # -> reserved memory is icacheable
 129  */
 130 static __init void parse_cmdline_early(char *cmdline_p)
 131 {
 132         char c = ' ', *to = cmdline_p;
 133         unsigned int memsize;
 134         for (;;) {
 135                 if (c == ' ') {
 136
 137                         if (!memcmp(to, "mem=", 4)) {
 138                                 to += 4;
 139                                 memsize = memparse(to, &to);
 140                                 if (memsize)
 141                                         _ramend = memsize;
 142
 143                         } else if (!memcmp(to, "max_mem=", 8)) {
 144                                 to += 8;
 145                                 memsize = memparse(to, &to);
 146                                 if (memsize) {
 147                                         physical_mem_end = memsize;
 148                                         if (*to != ' ') {
 149                                                 if (*to == '$'
 150                                                     || *(to + 1) == '$')
 151                                                         reserved_mem_dcache_on =
 152                                                             1;
 153                                                 if (*to == '#'
 154                                                     || *(to + 1) == '#')
 155                                                         reserved_mem_icache_on =
 156                                                             1;
 157                                         }
 158                                 }
 159                         }
 160
 161                 }
 162                 c = *(to++);
 163                 if (!c)
 164                         break;
 165         }
 166 }
 167
 168 void __init setup_arch(char **cmdline_p)
 169 {
 170         int bootmap_size;
 171         unsigned long l1_length, sclk, cclk;
 172 #ifdef CONFIG_MTD_UCLINUX
 173         unsigned long mtd_phys = 0;
 174 #endif
 175
 176 #ifdef CONFIG_DUMMY_CONSOLE
 177         conswitchp = &dummy_con;
 178 #endif
 179         cclk = get_cclk();
 180         sclk = get_sclk();
 181
 182 #if !defined(CONFIG_BFIN_KERNEL_CLOCK) && defined(ANOMALY_05000273)
 183         if (cclk == sclk)
 184                 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
 185 #endif
 186
 187 #if defined(ANOMALY_05000266)
 188         bfin_read_IMDMA_D0_IRQ_STATUS();
 189         bfin_read_IMDMA_D1_IRQ_STATUS();
 190 #endif
 191
 192 #ifdef DEBUG_SERIAL_EARLY_INIT
 193         bfin_console_init();    /* early console registration */
 194         /* this give a chance to get printk() working before crash. */
 195 #endif
 196
 197         printk(KERN_INFO "Hardware Trace ");
 198         if (bfin_read_TBUFCTL() & 0x1 )
 199                 printk("Active ");
 200         else
 201                 printk("Off ");
 202         if (bfin_read_TBUFCTL() & 0x2)
 203                 printk("and Enabled\n");
 204         else
 205         printk("and Disabled\n");
 206
 207
 208 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
 209         /* we need to initialize the Flashrom device here since we might
 210          * do things with flash early on in the boot
 211          */
 212         flash_probe();
 213 #endif
 214
 215 #if defined(CONFIG_CMDLINE_BOOL)
 216         strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
 217         command_line[sizeof(command_line) - 1] = 0;
 218 #endif
 219
 220         /* Keep a copy of command line */
 221         *cmdline_p = &command_line[0];
 222         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 223         boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
 224
 225         /* setup memory defaults from the user config */
 226         physical_mem_end = 0;
 227         _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
 228
 229         parse_cmdline_early(&command_line[0]);
 230
 231         if (physical_mem_end == 0)
 232                 physical_mem_end = _ramend;
 233
 234         /* by now the stack is part of the init task */
 235         memory_end = _ramend - DMA_UNCACHED_REGION;
 236
 237         _ramstart = (unsigned long)__bss_stop;
 238         memory_start = PAGE_ALIGN(_ramstart);
 239
 240 #if defined(CONFIG_MTD_UCLINUX)
 241         /* generic memory mapped MTD driver */
 242         memory_mtd_end = memory_end;
 243
 244         mtd_phys = _ramstart;
 245         mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
 246
 247 # if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
 248         if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
 249                 mtd_size =
 250                     PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
 251 # endif
 252
 253 # if defined(CONFIG_CRAMFS)
 254         if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
 255                 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
 256 # endif
 257
 258 # if defined(CONFIG_ROMFS_FS)
 259         if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
 260             && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
 261                 mtd_size =
 262                     PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
 263 #  if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
 264         /* Due to a Hardware Anomaly we need to limit the size of usable
 265          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
 266          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
 267          */
 268 #   if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
 269         if (memory_end >= 56 * 1024 * 1024)
 270                 memory_end = 56 * 1024 * 1024;
 271 #   else
 272         if (memory_end >= 60 * 1024 * 1024)
 273                 memory_end = 60 * 1024 * 1024;
 274 #   endif                               /* CONFIG_DEBUG_HUNT_FOR_ZERO */
 275 #  endif                                /* ANOMALY_05000263 */
 276 # endif                         /* CONFIG_ROMFS_FS */
 277
 278         memory_end -= mtd_size;
 279
 280         if (mtd_size == 0) {
 281                 console_init();
 282                 panic("Don't boot kernel without rootfs attached.\n");
 283         }
 284
 285         /* Relocate MTD image to the top of memory after the uncached memory area */
 286         dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
 287
 288         memory_mtd_start = memory_end;
 289         _ebss = memory_mtd_start;       /* define _ebss for compatible */
 290 #endif                          /* CONFIG_MTD_UCLINUX */
 291
 292 #if (defined(CONFIG_BLKFIN_CACHE) && defined(ANOMALY_05000263))
 293         /* Due to a Hardware Anomaly we need to limit the size of usable
 294          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
 295          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
 296          */
 297 #if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
 298         if (memory_end >= 56 * 1024 * 1024)
 299                 memory_end = 56 * 1024 * 1024;
 300 #else
 301         if (memory_end >= 60 * 1024 * 1024)
 302                 memory_end = 60 * 1024 * 1024;
 303 #endif                          /* CONFIG_DEBUG_HUNT_FOR_ZERO */
 304         printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
 305 #endif                          /* ANOMALY_05000263 */
 306
 307 #if !defined(CONFIG_MTD_UCLINUX)
 308         memory_end -= SIZE_4K; /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
 309 #endif
 310         init_mm.start_code = (unsigned long)_stext;
 311         init_mm.end_code = (unsigned long)_etext;
 312         init_mm.end_data = (unsigned long)_edata;
 313         init_mm.brk = (unsigned long)0;
 314
 315         init_leds();
 316
 317         printk(KERN_INFO "Blackfin support (C) 2004-2007 Analog Devices, Inc.\n");
 318         if (bfin_compiled_revid() == 0xffff)
 319                 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
 320         else if (bfin_compiled_revid() == -1)
 321                 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
 322         else
 323                 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
 324         if (bfin_revid() != bfin_compiled_revid()) {
 325                 if (bfin_compiled_revid() == -1)
 326                         printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
 327                                bfin_revid());
 328                 else if (bfin_compiled_revid() != 0xffff)
 329                         printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
 330                                bfin_compiled_revid(), bfin_revid());
 331         }
 332         if (bfin_revid() < SUPPORTED_REVID)
 333                 printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
 334                        CPU, bfin_revid());
 335         printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
 336
 337         printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu Mhz System Clock\n",
 338                cclk / 1000000,  sclk / 1000000);
 339
 340 #if defined(ANOMALY_05000273)
 341         if ((cclk >> 1) <= sclk)
 342                 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
 343 #endif
 344
 345         printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
 346         printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
 347
 348         printk(KERN_INFO "Memory map:\n"
 349                KERN_INFO "  text      = 0x%p-0x%p\n"
 350                KERN_INFO "  rodata    = 0x%p-0x%p\n"
 351                KERN_INFO "  data      = 0x%p-0x%p\n"
 352                KERN_INFO "    stack   = 0x%p-0x%p\n"
 353                KERN_INFO "  init      = 0x%p-0x%p\n"
 354                KERN_INFO "  bss       = 0x%p-0x%p\n"
 355                KERN_INFO "  available = 0x%p-0x%p\n"
 356 #ifdef CONFIG_MTD_UCLINUX
 357                KERN_INFO "  rootfs    = 0x%p-0x%p\n"
 358 #endif
 359 #if DMA_UNCACHED_REGION > 0
 360                KERN_INFO "  DMA Zone  = 0x%p-0x%p\n"
 361 #endif
 362                , _stext, _etext,
 363                __start_rodata, __end_rodata,
 364                _sdata, _edata,
 365                (void*)&init_thread_union, (void*)((int)(&init_thread_union) + 0x2000),
 366                __init_begin, __init_end,
 367                __bss_start, __bss_stop,
 368                (void*)_ramstart, (void*)memory_end
 369 #ifdef CONFIG_MTD_UCLINUX
 370                , (void*)memory_mtd_start, (void*)(memory_mtd_start + mtd_size)
 371 #endif
 372 #if DMA_UNCACHED_REGION > 0
 373                , (void*)(_ramend - DMA_UNCACHED_REGION), (void*)(_ramend)
 374 #endif
 375                );
 376
 377         /*
 378          * give all the memory to the bootmap allocator,  tell it to put the
 379          * boot mem_map at the start of memory
 380          */
 381         bootmap_size = init_bootmem_node(NODE_DATA(0), memory_start >> PAGE_SHIFT,      /* map goes here */
 382                                          PAGE_OFFSET >> PAGE_SHIFT,
 383                                          memory_end >> PAGE_SHIFT);
 384         /*
 385          * free the usable memory,  we have to make sure we do not free
 386          * the bootmem bitmap so we then reserve it after freeing it :-)
 387          */
 388         free_bootmem(memory_start, memory_end - memory_start);
 389
 390         reserve_bootmem(memory_start, bootmap_size);
 391         /*
 392          * get kmalloc into gear
 393          */
 394         paging_init();
 395
 396         /* check the size of the l1 area */
 397         l1_length = _etext_l1 - _stext_l1;
 398         if (l1_length > L1_CODE_LENGTH)
 399                 panic("L1 memory overflow\n");
 400
 401         l1_length = _ebss_l1 - _sdata_l1;
 402         if (l1_length > L1_DATA_A_LENGTH)
 403                 panic("L1 memory overflow\n");
 404
 405 #ifdef BF561_FAMILY
 406         _bfin_swrst = bfin_read_SICA_SWRST();
 407 #else
 408         _bfin_swrst = bfin_read_SWRST();
 409 #endif
 410
 411         /* Copy atomic sequences to their fixed location, and sanity check that
 412            these locations are the ones that we advertise to userspace.  */
 413         memcpy((void *)FIXED_CODE_START, &fixed_code_start,
 414                FIXED_CODE_END - FIXED_CODE_START);
 415         BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
 416                != SIGRETURN_STUB - FIXED_CODE_START);
 417         BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
 418                != ATOMIC_XCHG32 - FIXED_CODE_START);
 419         BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
 420                != ATOMIC_CAS32 - FIXED_CODE_START);
 421         BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
 422                != ATOMIC_ADD32 - FIXED_CODE_START);
 423         BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
 424                != ATOMIC_SUB32 - FIXED_CODE_START);
 425         BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
 426                != ATOMIC_IOR32 - FIXED_CODE_START);
 427         BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
 428                != ATOMIC_AND32 - FIXED_CODE_START);
 429         BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
 430                != ATOMIC_XOR32 - FIXED_CODE_START);
 431
 432         bf53x_cache_init();
 433 }
 434
 435 static int __init topology_init(void)
 436 {
 437 #if defined (CONFIG_BF561)
 438         static struct cpu cpu[2];
 439         register_cpu(&cpu[0], 0);
 440         register_cpu(&cpu[1], 1);
 441         return 0;
 442 #else
 443         static struct cpu cpu[1];
 444         return register_cpu(cpu, 0);
 445 #endif
 446 }
 447
 448 subsys_initcall(topology_init);
 449
 450 static u_long get_vco(void)
 451 {
 452         u_long msel;
 453         u_long vco;
 454
 455         msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
 456         if (0 == msel)
 457                 msel = 64;
 458
 459         vco = CONFIG_CLKIN_HZ;
 460         vco >>= (1 & bfin_read_PLL_CTL());      /* DF bit */
 461         vco = msel * vco;
 462         return vco;
 463 }
 464
 465 /*Get the Core clock*/
 466 u_long get_cclk(void)
 467 {
 468         u_long csel, ssel;
 469         if (bfin_read_PLL_STAT() & 0x1)
 470                 return CONFIG_CLKIN_HZ;
 471
 472         ssel = bfin_read_PLL_DIV();
 473         csel = ((ssel >> 4) & 0x03);
 474         ssel &= 0xf;
 475         if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
 476                 return get_vco() / ssel;
 477         return get_vco() >> csel;
 478 }
 479
 480 EXPORT_SYMBOL(get_cclk);
 481
 482 /* Get the System clock */
 483 u_long get_sclk(void)
 484 {
 485         u_long ssel;
 486
 487         if (bfin_read_PLL_STAT() & 0x1)
 488                 return CONFIG_CLKIN_HZ;
 489
 490         ssel = (bfin_read_PLL_DIV() & 0xf);
 491         if (0 == ssel) {
 492                 printk(KERN_WARNING "Invalid System Clock\n");
 493                 ssel = 1;
 494         }
 495
 496         return get_vco() / ssel;
 497 }
 498
 499 EXPORT_SYMBOL(get_sclk);
 500
 501 /*
 502  *      Get CPU information for use by the procfs.
 503  */
 504 static int show_cpuinfo(struct seq_file *m, void *v)
 505 {
 506         char *cpu, *mmu, *fpu, *name;
 507         uint32_t revid;
 508
 509         u_long cclk = 0, sclk = 0;
 510         u_int dcache_size = 0, dsup_banks = 0;
 511
 512         cpu = CPU;
 513         mmu = "none";
 514         fpu = "none";
 515         revid = bfin_revid();
 516         name = bfin_board_name;
 517
 518         cclk = get_cclk();
 519         sclk = get_sclk();
 520
 521         seq_printf(m, "CPU:\t\tADSP-%s Rev. 0.%d\n"
 522                    "MMU:\t\t%s\n"
 523                    "FPU:\t\t%s\n"
 524                    "Core Clock:\t%9lu Hz\n"
 525                    "System Clock:\t%9lu Hz\n"
 526                    "BogoMips:\t%lu.%02lu\n"
 527                    "Calibration:\t%lu loops\n",
 528                    cpu, revid, mmu, fpu,
 529                    cclk,
 530                    sclk,
 531                    (loops_per_jiffy * HZ) / 500000,
 532                    ((loops_per_jiffy * HZ) / 5000) % 100,
 533                    (loops_per_jiffy * HZ));
 534         seq_printf(m, "Board Name:\t%s\n", name);
 535         seq_printf(m, "Board Memory:\t%ld MB\n", physical_mem_end >> 20);
 536         seq_printf(m, "Kernel Memory:\t%ld MB\n", (unsigned long)_ramend >> 20);
 537         if (bfin_read_IMEM_CONTROL() & (ENICPLB | IMC))
 538                 seq_printf(m, "I-CACHE:\tON\n");
 539         else
 540                 seq_printf(m, "I-CACHE:\tOFF\n");
 541         if ((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE))
 542                 seq_printf(m, "D-CACHE:\tON"
 543 #if defined CONFIG_BLKFIN_WB
 544                            " (write-back)"
 545 #elif defined CONFIG_BLKFIN_WT
 546                            " (write-through)"
 547 #endif
 548                            "\n");
 549         else
 550                 seq_printf(m, "D-CACHE:\tOFF\n");
 551
 552
 553         switch(bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
 554                 case ACACHE_BSRAM:
 555                         seq_printf(m, "DBANK-A:\tCACHE\n" "DBANK-B:\tSRAM\n");
 556                         dcache_size = 16;
 557                         dsup_banks = 1;
 558                         break;
 559                 case ACACHE_BCACHE:
 560                         seq_printf(m, "DBANK-A:\tCACHE\n" "DBANK-B:\tCACHE\n");
 561                         dcache_size = 32;
 562                         dsup_banks = 2;
 563                         break;
 564                 case ASRAM_BSRAM:
 565                         seq_printf(m, "DBANK-A:\tSRAM\n" "DBANK-B:\tSRAM\n");
 566                         dcache_size = 0;
 567                         dsup_banks = 0;
 568                         break;
 569                 default:
 570                 break;
 571         }
 572
 573
 574         seq_printf(m, "I-CACHE Size:\t%dKB\n", BLKFIN_ICACHESIZE / 1024);
 575         seq_printf(m, "D-CACHE Size:\t%dKB\n", dcache_size);
 576         seq_printf(m, "I-CACHE Setup:\t%d Sub-banks/%d Ways, %d Lines/Way\n",
 577                    BLKFIN_ISUBBANKS, BLKFIN_IWAYS, BLKFIN_ILINES);
 578         seq_printf(m,
 579                    "D-CACHE Setup:\t%d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
 580                    dsup_banks, BLKFIN_DSUBBANKS, BLKFIN_DWAYS,
 581                    BLKFIN_DLINES);
 582 #ifdef CONFIG_BLKFIN_CACHE_LOCK
 583         switch (read_iloc()) {
 584         case WAY0_L:
 585                 seq_printf(m, "Way0 Locked-Down\n");
 586                 break;
 587         case WAY1_L:
 588                 seq_printf(m, "Way1 Locked-Down\n");
 589                 break;
 590         case WAY01_L:
 591                 seq_printf(m, "Way0,Way1 Locked-Down\n");
 592                 break;
 593         case WAY2_L:
 594                 seq_printf(m, "Way2 Locked-Down\n");
 595                 break;
 596         case WAY02_L:
 597                 seq_printf(m, "Way0,Way2 Locked-Down\n");
 598                 break;
 599         case WAY12_L:
 600                 seq_printf(m, "Way1,Way2 Locked-Down\n");
 601                 break;
 602         case WAY012_L:
 603                 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
 604                 break;
 605         case WAY3_L:
 606                 seq_printf(m, "Way3 Locked-Down\n");
 607                 break;
 608         case WAY03_L:
 609                 seq_printf(m, "Way0,Way3 Locked-Down\n");
 610                 break;
 611         case WAY13_L:
 612                 seq_printf(m, "Way1,Way3 Locked-Down\n");
 613                 break;
 614         case WAY013_L:
 615                 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
 616                 break;
 617         case WAY32_L:
 618                 seq_printf(m, "Way3,Way2 Locked-Down\n");
 619                 break;
 620         case WAY320_L:
 621                 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
 622                 break;
 623         case WAY321_L:
 624                 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
 625                 break;
 626         case WAYALL_L:
 627                 seq_printf(m, "All Ways are locked\n");
 628                 break;
 629         default:
 630                 seq_printf(m, "No Ways are locked\n");
 631         }
 632 #endif
 633         return 0;
 634 }
 635
 636 static void *c_start(struct seq_file *m, loff_t *pos)
 637 {
 638         return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
 639 }
 640
 641 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 642 {
 643         ++*pos;
 644         return c_start(m, pos);
 645 }
 646
 647 static void c_stop(struct seq_file *m, void *v)
 648 {
 649 }
 650
 651 struct seq_operations cpuinfo_op = {
 652         .start = c_start,
 653         .next = c_next,
 654         .stop = c_stop,
 655         .show = show_cpuinfo,
 656 };
 657
 658 void __init cmdline_init(const char *r0)
 659 {
 660         if (r0)
 661                 strncpy(command_line, r0, COMMAND_LINE_SIZE);
 662 }