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   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/cplb.h>
  43 #include <asm/cacheflush.h>
  44 #include <asm/blackfin.h>
  45 #include <asm/cplbinit.h>
  46 #include <asm/div64.h>
  47 #include <asm/fixed_code.h>
  48 #include <asm/early_printk.h>
  49
  50 u16 _bfin_swrst;
  51
  52 unsigned long memory_start, memory_end, physical_mem_end;
  53 unsigned long reserved_mem_dcache_on;
  54 unsigned long reserved_mem_icache_on;
  55 EXPORT_SYMBOL(memory_start);
  56 EXPORT_SYMBOL(memory_end);
  57 EXPORT_SYMBOL(physical_mem_end);
  58 EXPORT_SYMBOL(_ramend);
  59
  60 #ifdef CONFIG_MTD_UCLINUX
  61 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
  62 unsigned long _ebss;
  63 EXPORT_SYMBOL(memory_mtd_end);
  64 EXPORT_SYMBOL(memory_mtd_start);
  65 EXPORT_SYMBOL(mtd_size);
  66 #endif
  67
  68 char __initdata command_line[COMMAND_LINE_SIZE];
  69
  70 void __init bf53x_cache_init(void)
  71 {
  72 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
  73         generate_cpl_tables();
  74 #endif
  75
  76 #ifdef CONFIG_BFIN_ICACHE
  77         bfin_icache_init();
  78         printk(KERN_INFO "Instruction Cache Enabled\n");
  79 #endif
  80
  81 #ifdef CONFIG_BFIN_DCACHE
  82         bfin_dcache_init();
  83         printk(KERN_INFO "Data Cache Enabled"
  84 # if defined CONFIG_BFIN_WB
  85                 " (write-back)"
  86 # elif defined CONFIG_BFIN_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                         } else if (!memcmp(to, "earlyprintk=", 12)) {
 163                                 to += 12;
 164                                 setup_early_printk(to);
 165                         }
 166                 }
 167                 c = *(to++);
 168                 if (!c)
 169                         break;
 170         }
 171 }
 172
 173 void __init setup_arch(char **cmdline_p)
 174 {
 175         int bootmap_size;
 176         unsigned long l1_length, sclk, cclk;
 177 #ifdef CONFIG_MTD_UCLINUX
 178         unsigned long mtd_phys = 0;
 179 #endif
 180
 181 #ifdef CONFIG_DUMMY_CONSOLE
 182         conswitchp = &dummy_con;
 183 #endif
 184
 185 #if defined(CONFIG_CMDLINE_BOOL)
 186         strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
 187         command_line[sizeof(command_line) - 1] = 0;
 188 #endif
 189
 190         /* Keep a copy of command line */
 191         *cmdline_p = &command_line[0];
 192         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 193         boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
 194
 195         /* setup memory defaults from the user config */
 196         physical_mem_end = 0;
 197         _ramend = CONFIG_MEM_SIZE * 1024 * 1024;
 198
 199         parse_cmdline_early(&command_line[0]);
 200
 201         cclk = get_cclk();
 202         sclk = get_sclk();
 203
 204 #if !defined(CONFIG_BFIN_KERNEL_CLOCK)
 205         if (ANOMALY_05000273 && cclk == sclk)
 206                 panic("ANOMALY 05000273, SCLK can not be same as CCLK");
 207 #endif
 208
 209 #ifdef BF561_FAMILY
 210         if (ANOMALY_05000266) {
 211                 bfin_read_IMDMA_D0_IRQ_STATUS();
 212                 bfin_read_IMDMA_D1_IRQ_STATUS();
 213         }
 214 #endif
 215
 216         printk(KERN_INFO "Hardware Trace ");
 217         if (bfin_read_TBUFCTL() & 0x1 )
 218                 printk("Active ");
 219         else
 220                 printk("Off ");
 221         if (bfin_read_TBUFCTL() & 0x2)
 222                 printk("and Enabled\n");
 223         else
 224         printk("and Disabled\n");
 225
 226
 227 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
 228         /* we need to initialize the Flashrom device here since we might
 229          * do things with flash early on in the boot
 230          */
 231         flash_probe();
 232 #endif
 233
 234         if (physical_mem_end == 0)
 235                 physical_mem_end = _ramend;
 236
 237         /* by now the stack is part of the init task */
 238         memory_end = _ramend - DMA_UNCACHED_REGION;
 239
 240         _ramstart = (unsigned long)__bss_stop;
 241         memory_start = PAGE_ALIGN(_ramstart);
 242
 243 #if defined(CONFIG_MTD_UCLINUX)
 244         /* generic memory mapped MTD driver */
 245         memory_mtd_end = memory_end;
 246
 247         mtd_phys = _ramstart;
 248         mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
 249
 250 # if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
 251         if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
 252                 mtd_size =
 253                     PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
 254 # endif
 255
 256 # if defined(CONFIG_CRAMFS)
 257         if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
 258                 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
 259 # endif
 260
 261 # if defined(CONFIG_ROMFS_FS)
 262         if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
 263             && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
 264                 mtd_size =
 265                     PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
 266 #  if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
 267         /* Due to a Hardware Anomaly we need to limit the size of usable
 268          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
 269          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
 270          */
 271 #   if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
 272         if (memory_end >= 56 * 1024 * 1024)
 273                 memory_end = 56 * 1024 * 1024;
 274 #   else
 275         if (memory_end >= 60 * 1024 * 1024)
 276                 memory_end = 60 * 1024 * 1024;
 277 #   endif                               /* CONFIG_DEBUG_HUNT_FOR_ZERO */
 278 #  endif                                /* ANOMALY_05000263 */
 279 # endif                         /* CONFIG_ROMFS_FS */
 280
 281         memory_end -= mtd_size;
 282
 283         if (mtd_size == 0) {
 284                 console_init();
 285                 panic("Don't boot kernel without rootfs attached.\n");
 286         }
 287
 288         /* Relocate MTD image to the top of memory after the uncached memory area */
 289         dma_memcpy((char *)memory_end, __bss_stop, mtd_size);
 290
 291         memory_mtd_start = memory_end;
 292         _ebss = memory_mtd_start;       /* define _ebss for compatible */
 293 #endif                          /* CONFIG_MTD_UCLINUX */
 294
 295 #if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
 296         /* Due to a Hardware Anomaly we need to limit the size of usable
 297          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
 298          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
 299          */
 300 #if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
 301         if (memory_end >= 56 * 1024 * 1024)
 302                 memory_end = 56 * 1024 * 1024;
 303 #else
 304         if (memory_end >= 60 * 1024 * 1024)
 305                 memory_end = 60 * 1024 * 1024;
 306 #endif                          /* CONFIG_DEBUG_HUNT_FOR_ZERO */
 307         printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
 308 #endif                          /* ANOMALY_05000263 */
 309
 310 #if !defined(CONFIG_MTD_UCLINUX)
 311         memory_end -= SIZE_4K; /*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
 312 #endif
 313         init_mm.start_code = (unsigned long)_stext;
 314         init_mm.end_code = (unsigned long)_etext;
 315         init_mm.end_data = (unsigned long)_edata;
 316         init_mm.brk = (unsigned long)0;
 317
 318         _bfin_swrst = bfin_read_SWRST();
 319
 320         if (_bfin_swrst & RESET_DOUBLE)
 321                 printk(KERN_INFO "Recovering from Double Fault event\n");
 322         else if (_bfin_swrst & RESET_WDOG)
 323                 printk(KERN_INFO "Recovering from Watchdog event\n");
 324         else if (_bfin_swrst & RESET_SOFTWARE)
 325                 printk(KERN_NOTICE "Reset caused by Software reset\n");
 326
 327         printk(KERN_INFO "Blackfin support (C) 2004-2007 Analog Devices, Inc.\n");
 328         if (bfin_compiled_revid() == 0xffff)
 329                 printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
 330         else if (bfin_compiled_revid() == -1)
 331                 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
 332         else
 333                 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
 334         if (bfin_revid() != bfin_compiled_revid()) {
 335                 if (bfin_compiled_revid() == -1)
 336                         printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
 337                                bfin_revid());
 338                 else if (bfin_compiled_revid() != 0xffff)
 339                         printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
 340                                bfin_compiled_revid(), bfin_revid());
 341         }
 342         if (bfin_revid() < SUPPORTED_REVID)
 343                 printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
 344                        CPU, bfin_revid());
 345         printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
 346
 347         printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
 348                cclk / 1000000,  sclk / 1000000);
 349
 350         if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
 351                 printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
 352
 353         printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
 354         printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
 355
 356         printk(KERN_INFO "Memory map:\n"
 357                KERN_INFO "  text      = 0x%p-0x%p\n"
 358                KERN_INFO "  rodata    = 0x%p-0x%p\n"
 359                KERN_INFO "  data      = 0x%p-0x%p\n"
 360                KERN_INFO "    stack   = 0x%p-0x%p\n"
 361                KERN_INFO "  init      = 0x%p-0x%p\n"
 362                KERN_INFO "  bss       = 0x%p-0x%p\n"
 363                KERN_INFO "  available = 0x%p-0x%p\n"
 364 #ifdef CONFIG_MTD_UCLINUX
 365                KERN_INFO "  rootfs    = 0x%p-0x%p\n"
 366 #endif
 367 #if DMA_UNCACHED_REGION > 0
 368                KERN_INFO "  DMA Zone  = 0x%p-0x%p\n"
 369 #endif
 370                , _stext, _etext,
 371                __start_rodata, __end_rodata,
 372                _sdata, _edata,
 373                (void *)&init_thread_union, (void *)((int)(&init_thread_union) + 0x2000),
 374                __init_begin, __init_end,
 375                __bss_start, __bss_stop,
 376                (void *)_ramstart, (void *)memory_end
 377 #ifdef CONFIG_MTD_UCLINUX
 378                , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
 379 #endif
 380 #if DMA_UNCACHED_REGION > 0
 381                , (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
 382 #endif
 383                );
 384
 385         /*
 386          * give all the memory to the bootmap allocator,  tell it to put the
 387          * boot mem_map at the start of memory
 388          */
 389         bootmap_size = init_bootmem_node(NODE_DATA(0), memory_start >> PAGE_SHIFT,      /* map goes here */
 390                                          PAGE_OFFSET >> PAGE_SHIFT,
 391                                          memory_end >> PAGE_SHIFT);
 392         /*
 393          * free the usable memory,  we have to make sure we do not free
 394          * the bootmem bitmap so we then reserve it after freeing it :-)
 395          */
 396         free_bootmem(memory_start, memory_end - memory_start);
 397
 398         reserve_bootmem(memory_start, bootmap_size);
 399         /*
 400          * get kmalloc into gear
 401          */
 402         paging_init();
 403
 404         /* check the size of the l1 area */
 405         l1_length = _etext_l1 - _stext_l1;
 406         if (l1_length > L1_CODE_LENGTH)
 407                 panic("L1 code memory overflow\n");
 408
 409         l1_length = _ebss_l1 - _sdata_l1;
 410         if (l1_length > L1_DATA_A_LENGTH)
 411                 panic("L1 data memory overflow\n");
 412
 413         /* Copy atomic sequences to their fixed location, and sanity check that
 414            these locations are the ones that we advertise to userspace.  */
 415         memcpy((void *)FIXED_CODE_START, &fixed_code_start,
 416                FIXED_CODE_END - FIXED_CODE_START);
 417         BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
 418                != SIGRETURN_STUB - FIXED_CODE_START);
 419         BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
 420                != ATOMIC_XCHG32 - FIXED_CODE_START);
 421         BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
 422                != ATOMIC_CAS32 - FIXED_CODE_START);
 423         BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
 424                != ATOMIC_ADD32 - FIXED_CODE_START);
 425         BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
 426                != ATOMIC_SUB32 - FIXED_CODE_START);
 427         BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
 428                != ATOMIC_IOR32 - FIXED_CODE_START);
 429         BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
 430                != ATOMIC_AND32 - FIXED_CODE_START);
 431         BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
 432                != ATOMIC_XOR32 - FIXED_CODE_START);
 433         BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
 434                 != SAFE_USER_INSTRUCTION - FIXED_CODE_START);
 435
 436         init_exception_vectors();
 437         bf53x_cache_init();
 438 }
 439
 440 static int __init topology_init(void)
 441 {
 442 #if defined (CONFIG_BF561)
 443         static struct cpu cpu[2];
 444         register_cpu(&cpu[0], 0);
 445         register_cpu(&cpu[1], 1);
 446         return 0;
 447 #else
 448         static struct cpu cpu[1];
 449         return register_cpu(cpu, 0);
 450 #endif
 451 }
 452
 453 subsys_initcall(topology_init);
 454
 455 static u_long get_vco(void)
 456 {
 457         u_long msel;
 458         u_long vco;
 459
 460         msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
 461         if (0 == msel)
 462                 msel = 64;
 463
 464         vco = CONFIG_CLKIN_HZ;
 465         vco >>= (1 & bfin_read_PLL_CTL());      /* DF bit */
 466         vco = msel * vco;
 467         return vco;
 468 }
 469
 470 /* Get the Core clock */
 471 u_long get_cclk(void)
 472 {
 473         u_long csel, ssel;
 474         if (bfin_read_PLL_STAT() & 0x1)
 475                 return CONFIG_CLKIN_HZ;
 476
 477         ssel = bfin_read_PLL_DIV();
 478         csel = ((ssel >> 4) & 0x03);
 479         ssel &= 0xf;
 480         if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
 481                 return get_vco() / ssel;
 482         return get_vco() >> csel;
 483 }
 484 EXPORT_SYMBOL(get_cclk);
 485
 486 /* Get the System clock */
 487 u_long get_sclk(void)
 488 {
 489         u_long ssel;
 490
 491         if (bfin_read_PLL_STAT() & 0x1)
 492                 return CONFIG_CLKIN_HZ;
 493
 494         ssel = (bfin_read_PLL_DIV() & 0xf);
 495         if (0 == ssel) {
 496                 printk(KERN_WARNING "Invalid System Clock\n");
 497                 ssel = 1;
 498         }
 499
 500         return get_vco() / ssel;
 501 }
 502 EXPORT_SYMBOL(get_sclk);
 503
 504 unsigned long sclk_to_usecs(unsigned long sclk)
 505 {
 506         u64 tmp = USEC_PER_SEC * (u64)sclk;
 507         do_div(tmp, get_sclk());
 508         return tmp;
 509 }
 510 EXPORT_SYMBOL(sclk_to_usecs);
 511
 512 unsigned long usecs_to_sclk(unsigned long usecs)
 513 {
 514         u64 tmp = get_sclk() * (u64)usecs;
 515         do_div(tmp, USEC_PER_SEC);
 516         return tmp;
 517 }
 518 EXPORT_SYMBOL(usecs_to_sclk);
 519
 520 /*
 521  *      Get CPU information for use by the procfs.
 522  */
 523 static int show_cpuinfo(struct seq_file *m, void *v)
 524 {
 525         char *cpu, *mmu, *fpu, *vendor, *cache;
 526         uint32_t revid;
 527
 528         u_long cclk = 0, sclk = 0;
 529         u_int dcache_size = 0, dsup_banks = 0;
 530
 531         cpu = CPU;
 532         mmu = "none";
 533         fpu = "none";
 534         revid = bfin_revid();
 535
 536         cclk = get_cclk();
 537         sclk = get_sclk();
 538
 539         switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
 540         case 0xca:
 541                 vendor = "Analog Devices";
 542                 break;
 543         default:
 544                 vendor = "unknown";
 545                 break;
 546         }
 547
 548         seq_printf(m, "processor\t: %d\n"
 549                 "vendor_id\t: %s\n"
 550                 "cpu family\t: 0x%x\n"
 551                 "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK)\n"
 552                 "stepping\t: %d\n",
 553                 0,
 554                 vendor,
 555                 (bfin_read_CHIPID() & CHIPID_FAMILY),
 556                 cpu, cclk/1000000, sclk/1000000,
 557                 revid);
 558
 559         seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
 560                 cclk/1000000, cclk%1000000,
 561                 sclk/1000000, sclk%1000000);
 562         seq_printf(m, "bogomips\t: %lu.%02lu\n"
 563                 "Calibration\t: %lu loops\n",
 564                 (loops_per_jiffy * HZ) / 500000,
 565                 ((loops_per_jiffy * HZ) / 5000) % 100,
 566                 (loops_per_jiffy * HZ));
 567
 568         /* Check Cache configutation */
 569         switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
 570         case ACACHE_BSRAM:
 571                 cache = "dbank-A/B\t: cache/sram";
 572                 dcache_size = 16;
 573                 dsup_banks = 1;
 574                 break;
 575         case ACACHE_BCACHE:
 576                 cache = "dbank-A/B\t: cache/cache";
 577                 dcache_size = 32;
 578                 dsup_banks = 2;
 579                 break;
 580         case ASRAM_BSRAM:
 581                 cache = "dbank-A/B\t: sram/sram";
 582                 dcache_size = 0;
 583                 dsup_banks = 0;
 584                 break;
 585         default:
 586                 cache = "unknown";
 587                 dcache_size = 0;
 588                 dsup_banks = 0;
 589                 break;
 590         }
 591
 592         /* Is it turned on? */
 593         if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
 594                 dcache_size = 0;
 595
 596         seq_printf(m, "cache size\t: %d KB(L1 icache) "
 597                 "%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
 598                 BFIN_ICACHESIZE / 1024, dcache_size,
 599 #if defined CONFIG_BFIN_WB
 600                 "wb"
 601 #elif defined CONFIG_BFIN_WT
 602                 "wt"
 603 #endif
 604                 "", 0);
 605
 606         seq_printf(m, "%s\n", cache);
 607
 608         seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
 609                    BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
 610         seq_printf(m,
 611                    "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
 612                    dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
 613                    BFIN_DLINES);
 614 #ifdef CONFIG_BFIN_ICACHE_LOCK
 615         switch (read_iloc()) {
 616         case WAY0_L:
 617                 seq_printf(m, "Way0 Locked-Down\n");
 618                 break;
 619         case WAY1_L:
 620                 seq_printf(m, "Way1 Locked-Down\n");
 621                 break;
 622         case WAY01_L:
 623                 seq_printf(m, "Way0,Way1 Locked-Down\n");
 624                 break;
 625         case WAY2_L:
 626                 seq_printf(m, "Way2 Locked-Down\n");
 627                 break;
 628         case WAY02_L:
 629                 seq_printf(m, "Way0,Way2 Locked-Down\n");
 630                 break;
 631         case WAY12_L:
 632                 seq_printf(m, "Way1,Way2 Locked-Down\n");
 633                 break;
 634         case WAY012_L:
 635                 seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
 636                 break;
 637         case WAY3_L:
 638                 seq_printf(m, "Way3 Locked-Down\n");
 639                 break;
 640         case WAY03_L:
 641                 seq_printf(m, "Way0,Way3 Locked-Down\n");
 642                 break;
 643         case WAY13_L:
 644                 seq_printf(m, "Way1,Way3 Locked-Down\n");
 645                 break;
 646         case WAY013_L:
 647                 seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
 648                 break;
 649         case WAY32_L:
 650                 seq_printf(m, "Way3,Way2 Locked-Down\n");
 651                 break;
 652         case WAY320_L:
 653                 seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
 654                 break;
 655         case WAY321_L:
 656                 seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
 657                 break;
 658         case WAYALL_L:
 659                 seq_printf(m, "All Ways are locked\n");
 660                 break;
 661         default:
 662                 seq_printf(m, "No Ways are locked\n");
 663         }
 664 #endif
 665
 666         seq_printf(m, "board name\t: %s\n", bfin_board_name);
 667         seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
 668                  physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
 669         seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
 670                 ((int)memory_end - (int)_stext) >> 10,
 671                 _stext,
 672                 (void *)memory_end);
 673
 674         return 0;
 675 }
 676
 677 static void *c_start(struct seq_file *m, loff_t *pos)
 678 {
 679         return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
 680 }
 681
 682 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 683 {
 684         ++*pos;
 685         return c_start(m, pos);
 686 }
 687
 688 static void c_stop(struct seq_file *m, void *v)
 689 {
 690 }
 691
 692 struct seq_operations cpuinfo_op = {
 693         .start = c_start,
 694         .next = c_next,
 695         .stop = c_stop,
 696         .show = show_cpuinfo,
 697 };
 698
 699 void __init cmdline_init(const char *r0)
 700 {
 701         if (r0)
 702                 strncpy(command_line, r0, COMMAND_LINE_SIZE);
 703 }