arch/blackfin/kernel/setup.c

   1 /*
   2  * Copyright 2004-2010 Analog Devices Inc.
   3  *
   4  * Licensed under the GPL-2 or later.
   5  */
   6
   7 #include <linux/delay.h>
   8 #include <linux/console.h>
   9 #include <linux/bootmem.h>
  10 #include <linux/seq_file.h>
  11 #include <linux/cpu.h>
  12 #include <linux/mm.h>
  13 #include <linux/module.h>
  14 #include <linux/tty.h>
  15 #include <linux/pfn.h>
  16
  17 #ifdef CONFIG_MTD_UCLINUX
  18 #include <linux/mtd/map.h>
  19 #include <linux/ext2_fs.h>
  20 #include <linux/cramfs_fs.h>
  21 #include <linux/romfs_fs.h>
  22 #endif
  23
  24 #include <asm/cplb.h>
  25 #include <asm/cacheflush.h>
  26 #include <asm/blackfin.h>
  27 #include <asm/cplbinit.h>
  28 #include <asm/div64.h>
  29 #include <asm/cpu.h>
  30 #include <asm/fixed_code.h>
  31 #include <asm/early_printk.h>
  32
  33 u16 _bfin_swrst;
  34 EXPORT_SYMBOL(_bfin_swrst);
  35
  36 unsigned long memory_start, memory_end, physical_mem_end;
  37 unsigned long _rambase, _ramstart, _ramend;
  38 unsigned long reserved_mem_dcache_on;
  39 unsigned long reserved_mem_icache_on;
  40 EXPORT_SYMBOL(memory_start);
  41 EXPORT_SYMBOL(memory_end);
  42 EXPORT_SYMBOL(physical_mem_end);
  43 EXPORT_SYMBOL(_ramend);
  44 EXPORT_SYMBOL(reserved_mem_dcache_on);
  45
  46 #ifdef CONFIG_MTD_UCLINUX
  47 extern struct map_info uclinux_ram_map;
  48 unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
  49 unsigned long _ebss;
  50 EXPORT_SYMBOL(memory_mtd_end);
  51 EXPORT_SYMBOL(memory_mtd_start);
  52 EXPORT_SYMBOL(mtd_size);
  53 #endif
  54
  55 char __initdata command_line[COMMAND_LINE_SIZE];
  56 void __initdata *init_retx, *init_saved_retx, *init_saved_seqstat,
  57         *init_saved_icplb_fault_addr, *init_saved_dcplb_fault_addr;
  58
  59 /* boot memmap, for parsing "memmap=" */
  60 #define BFIN_MEMMAP_MAX         128 /* number of entries in bfin_memmap */
  61 #define BFIN_MEMMAP_RAM         1
  62 #define BFIN_MEMMAP_RESERVED    2
  63 static struct bfin_memmap {
  64         int nr_map;
  65         struct bfin_memmap_entry {
  66                 unsigned long long addr; /* start of memory segment */
  67                 unsigned long long size;
  68                 unsigned long type;
  69         } map[BFIN_MEMMAP_MAX];
  70 } bfin_memmap __initdata;
  71
  72 /* for memmap sanitization */
  73 struct change_member {
  74         struct bfin_memmap_entry *pentry; /* pointer to original entry */
  75         unsigned long long addr; /* address for this change point */
  76 };
  77 static struct change_member change_point_list[2*BFIN_MEMMAP_MAX] __initdata;
  78 static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata;
  79 static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata;
  80 static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata;
  81
  82 DEFINE_PER_CPU(struct blackfin_cpudata, cpu_data);
  83
  84 static int early_init_clkin_hz(char *buf);
  85
  86 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
  87 void __init generate_cplb_tables(void)
  88 {
  89         unsigned int cpu;
  90
  91         generate_cplb_tables_all();
  92         /* Generate per-CPU I&D CPLB tables */
  93         for (cpu = 0; cpu < num_possible_cpus(); ++cpu)
  94                 generate_cplb_tables_cpu(cpu);
  95 }
  96 #endif
  97
  98 void __cpuinit bfin_setup_caches(unsigned int cpu)
  99 {
 100 #ifdef CONFIG_BFIN_ICACHE
 101         bfin_icache_init(icplb_tbl[cpu]);
 102 #endif
 103
 104 #ifdef CONFIG_BFIN_DCACHE
 105         bfin_dcache_init(dcplb_tbl[cpu]);
 106 #endif
 107
 108         /*
 109          * In cache coherence emulation mode, we need to have the
 110          * D-cache enabled before running any atomic operation which
 111          * might involve cache invalidation (i.e. spinlock, rwlock).
 112          * So printk's are deferred until then.
 113          */
 114 #ifdef CONFIG_BFIN_ICACHE
 115         printk(KERN_INFO "Instruction Cache Enabled for CPU%u\n", cpu);
 116         printk(KERN_INFO "  External memory:"
 117 # ifdef CONFIG_BFIN_EXTMEM_ICACHEABLE
 118                " cacheable"
 119 # else
 120                " uncacheable"
 121 # endif
 122                " in instruction cache\n");
 123         if (L2_LENGTH)
 124                 printk(KERN_INFO "  L2 SRAM        :"
 125 # ifdef CONFIG_BFIN_L2_ICACHEABLE
 126                        " cacheable"
 127 # else
 128                        " uncacheable"
 129 # endif
 130                        " in instruction cache\n");
 131
 132 #else
 133         printk(KERN_INFO "Instruction Cache Disabled for CPU%u\n", cpu);
 134 #endif
 135
 136 #ifdef CONFIG_BFIN_DCACHE
 137         printk(KERN_INFO "Data Cache Enabled for CPU%u\n", cpu);
 138         printk(KERN_INFO "  External memory:"
 139 # if defined CONFIG_BFIN_EXTMEM_WRITEBACK
 140                " cacheable (write-back)"
 141 # elif defined CONFIG_BFIN_EXTMEM_WRITETHROUGH
 142                " cacheable (write-through)"
 143 # else
 144                " uncacheable"
 145 # endif
 146                " in data cache\n");
 147         if (L2_LENGTH)
 148                 printk(KERN_INFO "  L2 SRAM        :"
 149 # if defined CONFIG_BFIN_L2_WRITEBACK
 150                        " cacheable (write-back)"
 151 # elif defined CONFIG_BFIN_L2_WRITETHROUGH
 152                        " cacheable (write-through)"
 153 # else
 154                        " uncacheable"
 155 # endif
 156                        " in data cache\n");
 157 #else
 158         printk(KERN_INFO "Data Cache Disabled for CPU%u\n", cpu);
 159 #endif
 160 }
 161
 162 void __cpuinit bfin_setup_cpudata(unsigned int cpu)
 163 {
 164         struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, cpu);
 165
 166         cpudata->idle = current;
 167         cpudata->imemctl = bfin_read_IMEM_CONTROL();
 168         cpudata->dmemctl = bfin_read_DMEM_CONTROL();
 169 }
 170
 171 void __init bfin_cache_init(void)
 172 {
 173 #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
 174         generate_cplb_tables();
 175 #endif
 176         bfin_setup_caches(0);
 177 }
 178
 179 void __init bfin_relocate_l1_mem(void)
 180 {
 181         unsigned long text_l1_len = (unsigned long)_text_l1_len;
 182         unsigned long data_l1_len = (unsigned long)_data_l1_len;
 183         unsigned long data_b_l1_len = (unsigned long)_data_b_l1_len;
 184         unsigned long l2_len = (unsigned long)_l2_len;
 185
 186         early_shadow_stamp();
 187
 188         /*
 189          * due to the ALIGN(4) in the arch/blackfin/kernel/vmlinux.lds.S
 190          * we know that everything about l1 text/data is nice and aligned,
 191          * so copy by 4 byte chunks, and don't worry about overlapping
 192          * src/dest.
 193          *
 194          * We can't use the dma_memcpy functions, since they can call
 195          * scheduler functions which might be in L1 :( and core writes
 196          * into L1 instruction cause bad access errors, so we are stuck,
 197          * we are required to use DMA, but can't use the common dma
 198          * functions. We can't use memcpy either - since that might be
 199          * going to be in the relocated L1
 200          */
 201
 202         blackfin_dma_early_init();
 203
 204         /* if necessary, copy L1 text to L1 instruction SRAM */
 205         if (L1_CODE_LENGTH && text_l1_len)
 206                 early_dma_memcpy(_stext_l1, _text_l1_lma, text_l1_len);
 207
 208         /* if necessary, copy L1 data to L1 data bank A SRAM */
 209         if (L1_DATA_A_LENGTH && data_l1_len)
 210                 early_dma_memcpy(_sdata_l1, _data_l1_lma, data_l1_len);
 211
 212         /* if necessary, copy L1 data B to L1 data bank B SRAM */
 213         if (L1_DATA_B_LENGTH && data_b_l1_len)
 214                 early_dma_memcpy(_sdata_b_l1, _data_b_l1_lma, data_b_l1_len);
 215
 216         early_dma_memcpy_done();
 217
 218         /* if necessary, copy L2 text/data to L2 SRAM */
 219         if (L2_LENGTH && l2_len)
 220                 memcpy(_stext_l2, _l2_lma, l2_len);
 221 }
 222
 223 #ifdef CONFIG_ROMKERNEL
 224 void __init bfin_relocate_xip_data(void)
 225 {
 226         early_shadow_stamp();
 227
 228         memcpy(_sdata, _data_lma, (unsigned long)_data_len - THREAD_SIZE + sizeof(struct thread_info));
 229         memcpy(_sinitdata, _init_data_lma, (unsigned long)_init_data_len);
 230 }
 231 #endif
 232
 233 /* add_memory_region to memmap */
 234 static void __init add_memory_region(unsigned long long start,
 235                               unsigned long long size, int type)
 236 {
 237         int i;
 238
 239         i = bfin_memmap.nr_map;
 240
 241         if (i == BFIN_MEMMAP_MAX) {
 242                 printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
 243                 return;
 244         }
 245
 246         bfin_memmap.map[i].addr = start;
 247         bfin_memmap.map[i].size = size;
 248         bfin_memmap.map[i].type = type;
 249         bfin_memmap.nr_map++;
 250 }
 251
 252 /*
 253  * Sanitize the boot memmap, removing overlaps.
 254  */
 255 static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
 256 {
 257         struct change_member *change_tmp;
 258         unsigned long current_type, last_type;
 259         unsigned long long last_addr;
 260         int chgidx, still_changing;
 261         int overlap_entries;
 262         int new_entry;
 263         int old_nr, new_nr, chg_nr;
 264         int i;
 265
 266         /*
 267                 Visually we're performing the following (1,2,3,4 = memory types)
 268
 269                 Sample memory map (w/overlaps):
 270                    ____22__________________
 271                    ______________________4_
 272                    ____1111________________
 273                    _44_____________________
 274                    11111111________________
 275                    ____________________33__
 276                    ___________44___________
 277                    __________33333_________
 278                    ______________22________
 279                    ___________________2222_
 280                    _________111111111______
 281                    _____________________11_
 282                    _________________4______
 283
 284                 Sanitized equivalent (no overlap):
 285                    1_______________________
 286                    _44_____________________
 287                    ___1____________________
 288                    ____22__________________
 289                    ______11________________
 290                    _________1______________
 291                    __________3_____________
 292                    ___________44___________
 293                    _____________33_________
 294                    _______________2________
 295                    ________________1_______
 296                    _________________4______
 297                    ___________________2____
 298                    ____________________33__
 299                    ______________________4_
 300         */
 301         /* if there's only one memory region, don't bother */
 302         if (*pnr_map < 2)
 303                 return -1;
 304
 305         old_nr = *pnr_map;
 306
 307         /* bail out if we find any unreasonable addresses in memmap */
 308         for (i = 0; i < old_nr; i++)
 309                 if (map[i].addr + map[i].size < map[i].addr)
 310                         return -1;
 311
 312         /* create pointers for initial change-point information (for sorting) */
 313         for (i = 0; i < 2*old_nr; i++)
 314                 change_point[i] = &change_point_list[i];
 315
 316         /* record all known change-points (starting and ending addresses),
 317            omitting those that are for empty memory regions */
 318         chgidx = 0;
 319         for (i = 0; i < old_nr; i++) {
 320                 if (map[i].size != 0) {
 321                         change_point[chgidx]->addr = map[i].addr;
 322                         change_point[chgidx++]->pentry = &map[i];
 323                         change_point[chgidx]->addr = map[i].addr + map[i].size;
 324                         change_point[chgidx++]->pentry = &map[i];
 325                 }
 326         }
 327         chg_nr = chgidx;        /* true number of change-points */
 328
 329         /* sort change-point list by memory addresses (low -> high) */
 330         still_changing = 1;
 331         while (still_changing) {
 332                 still_changing = 0;
 333                 for (i = 1; i < chg_nr; i++) {
 334                         /* if <current_addr> > <last_addr>, swap */
 335                         /* or, if current=<start_addr> & last=<end_addr>, swap */
 336                         if ((change_point[i]->addr < change_point[i-1]->addr) ||
 337                                 ((change_point[i]->addr == change_point[i-1]->addr) &&
 338                                  (change_point[i]->addr == change_point[i]->pentry->addr) &&
 339                                  (change_point[i-1]->addr != change_point[i-1]->pentry->addr))
 340                            ) {
 341                                 change_tmp = change_point[i];
 342                                 change_point[i] = change_point[i-1];
 343                                 change_point[i-1] = change_tmp;
 344                                 still_changing = 1;
 345                         }
 346                 }
 347         }
 348
 349         /* create a new memmap, removing overlaps */
 350         overlap_entries = 0;    /* number of entries in the overlap table */
 351         new_entry = 0;          /* index for creating new memmap entries */
 352         last_type = 0;          /* start with undefined memory type */
 353         last_addr = 0;          /* start with 0 as last starting address */
 354         /* loop through change-points, determining affect on the new memmap */
 355         for (chgidx = 0; chgidx < chg_nr; chgidx++) {
 356                 /* keep track of all overlapping memmap entries */
 357                 if (change_point[chgidx]->addr == change_point[chgidx]->pentry->addr) {
 358                         /* add map entry to overlap list (> 1 entry implies an overlap) */
 359                         overlap_list[overlap_entries++] = change_point[chgidx]->pentry;
 360                 } else {
 361                         /* remove entry from list (order independent, so swap with last) */
 362                         for (i = 0; i < overlap_entries; i++) {
 363                                 if (overlap_list[i] == change_point[chgidx]->pentry)
 364                                         overlap_list[i] = overlap_list[overlap_entries-1];
 365                         }
 366                         overlap_entries--;
 367                 }
 368                 /* if there are overlapping entries, decide which "type" to use */
 369                 /* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
 370                 current_type = 0;
 371                 for (i = 0; i < overlap_entries; i++)
 372                         if (overlap_list[i]->type > current_type)
 373                                 current_type = overlap_list[i]->type;
 374                 /* continue building up new memmap based on this information */
 375                 if (current_type != last_type) {
 376                         if (last_type != 0) {
 377                                 new_map[new_entry].size =
 378                                         change_point[chgidx]->addr - last_addr;
 379                                 /* move forward only if the new size was non-zero */
 380                                 if (new_map[new_entry].size != 0)
 381                                         if (++new_entry >= BFIN_MEMMAP_MAX)
 382                                                 break;  /* no more space left for new entries */
 383                         }
 384                         if (current_type != 0) {
 385                                 new_map[new_entry].addr = change_point[chgidx]->addr;
 386                                 new_map[new_entry].type = current_type;
 387                                 last_addr = change_point[chgidx]->addr;
 388                         }
 389                         last_type = current_type;
 390                 }
 391         }
 392         new_nr = new_entry;     /* retain count for new entries */
 393
 394         /* copy new mapping into original location */
 395         memcpy(map, new_map, new_nr*sizeof(struct bfin_memmap_entry));
 396         *pnr_map = new_nr;
 397
 398         return 0;
 399 }
 400
 401 static void __init print_memory_map(char *who)
 402 {
 403         int i;
 404
 405         for (i = 0; i < bfin_memmap.nr_map; i++) {
 406                 printk(KERN_DEBUG " %s: %016Lx - %016Lx ", who,
 407                         bfin_memmap.map[i].addr,
 408                         bfin_memmap.map[i].addr + bfin_memmap.map[i].size);
 409                 switch (bfin_memmap.map[i].type) {
 410                 case BFIN_MEMMAP_RAM:
 411                         printk(KERN_CONT "(usable)\n");
 412                         break;
 413                 case BFIN_MEMMAP_RESERVED:
 414                         printk(KERN_CONT "(reserved)\n");
 415                         break;
 416                 default:
 417                         printk(KERN_CONT "type %lu\n", bfin_memmap.map[i].type);
 418                         break;
 419                 }
 420         }
 421 }
 422
 423 static __init int parse_memmap(char *arg)
 424 {
 425         unsigned long long start_at, mem_size;
 426
 427         if (!arg)
 428                 return -EINVAL;
 429
 430         mem_size = memparse(arg, &arg);
 431         if (*arg == '@') {
 432                 start_at = memparse(arg+1, &arg);
 433                 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RAM);
 434         } else if (*arg == '$') {
 435                 start_at = memparse(arg+1, &arg);
 436                 add_memory_region(start_at, mem_size, BFIN_MEMMAP_RESERVED);
 437         }
 438
 439         return 0;
 440 }
 441
 442 /*
 443  * Initial parsing of the command line.  Currently, we support:
 444  *  - Controlling the linux memory size: mem=xxx[KMG]
 445  *  - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
 446  *       $ -> reserved memory is dcacheable
 447  *       # -> reserved memory is icacheable
 448  *  - "memmap=XXX[KkmM][@][$]XXX[KkmM]" defines a memory region
 449  *       @ from <start> to <start>+<mem>, type RAM
 450  *       $ from <start> to <start>+<mem>, type RESERVED
 451  */
 452 static __init void parse_cmdline_early(char *cmdline_p)
 453 {
 454         char c = ' ', *to = cmdline_p;
 455         unsigned int memsize;
 456         for (;;) {
 457                 if (c == ' ') {
 458                         if (!memcmp(to, "mem=", 4)) {
 459                                 to += 4;
 460                                 memsize = memparse(to, &to);
 461                                 if (memsize)
 462                                         _ramend = memsize;
 463
 464                         } else if (!memcmp(to, "max_mem=", 8)) {
 465                                 to += 8;
 466                                 memsize = memparse(to, &to);
 467                                 if (memsize) {
 468                                         physical_mem_end = memsize;
 469                                         if (*to != ' ') {
 470                                                 if (*to == '$'
 471                                                     || *(to + 1) == '$')
 472                                                         reserved_mem_dcache_on = 1;
 473                                                 if (*to == '#'
 474                                                     || *(to + 1) == '#')
 475                                                         reserved_mem_icache_on = 1;
 476                                         }
 477                                 }
 478                         } else if (!memcmp(to, "clkin_hz=", 9)) {
 479                                 to += 9;
 480                                 early_init_clkin_hz(to);
 481 #ifdef CONFIG_EARLY_PRINTK
 482                         } else if (!memcmp(to, "earlyprintk=", 12)) {
 483                                 to += 12;
 484                                 setup_early_printk(to);
 485 #endif
 486                         } else if (!memcmp(to, "memmap=", 7)) {
 487                                 to += 7;
 488                                 parse_memmap(to);
 489                         }
 490                 }
 491                 c = *(to++);
 492                 if (!c)
 493                         break;
 494         }
 495 }
 496
 497 /*
 498  * Setup memory defaults from user config.
 499  * The physical memory layout looks like:
 500  *
 501  *  [_rambase, _ramstart]:              kernel image
 502  *  [memory_start, memory_end]:         dynamic memory managed by kernel
 503  *  [memory_end, _ramend]:              reserved memory
 504  *      [memory_mtd_start(memory_end),
 505  *              memory_mtd_start + mtd_size]:   rootfs (if any)
 506  *      [_ramend - DMA_UNCACHED_REGION,
 507  *              _ramend]:                       uncached DMA region
 508  *  [_ramend, physical_mem_end]:        memory not managed by kernel
 509  */
 510 static __init void memory_setup(void)
 511 {
 512 #ifdef CONFIG_MTD_UCLINUX
 513         unsigned long mtd_phys = 0;
 514 #endif
 515         unsigned long max_mem;
 516
 517         _rambase = CONFIG_BOOT_LOAD;
 518         _ramstart = (unsigned long)_end;
 519
 520         if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
 521                 console_init();
 522                 panic("DMA region exceeds memory limit: %lu.",
 523                         _ramend - _ramstart);
 524         }
 525         max_mem = memory_end = _ramend - DMA_UNCACHED_REGION;
 526
 527 #if (defined(CONFIG_BFIN_EXTMEM_ICACHEABLE) && ANOMALY_05000263)
 528         /* Due to a Hardware Anomaly we need to limit the size of usable
 529          * instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
 530          * 05000263 - Hardware loop corrupted when taking an ICPLB exception
 531          */
 532 # if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
 533         if (max_mem >= 56 * 1024 * 1024)
 534                 max_mem = 56 * 1024 * 1024;
 535 # else
 536         if (max_mem >= 60 * 1024 * 1024)
 537                 max_mem = 60 * 1024 * 1024;
 538 # endif                         /* CONFIG_DEBUG_HUNT_FOR_ZERO */
 539 #endif                          /* ANOMALY_05000263 */
 540
 541
 542 #ifdef CONFIG_MPU
 543         /* Round up to multiple of 4MB */
 544         memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
 545 #else
 546         memory_start = PAGE_ALIGN(_ramstart);
 547 #endif
 548
 549 #if defined(CONFIG_MTD_UCLINUX)
 550         /* generic memory mapped MTD driver */
 551         memory_mtd_end = memory_end;
 552
 553         mtd_phys = _ramstart;
 554         mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
 555
 556 # if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
 557         if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
 558                 mtd_size =
 559                     PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
 560 # endif
 561
 562 # if defined(CONFIG_CRAMFS)
 563         if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
 564                 mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
 565 # endif
 566
 567 # if defined(CONFIG_ROMFS_FS)
 568         if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
 569             && ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1) {
 570                 mtd_size =
 571                     PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
 572
 573                 /* ROM_FS is XIP, so if we found it, we need to limit memory */
 574                 if (memory_end > max_mem) {
 575                         pr_info("Limiting kernel memory to %liMB due to anomaly 05000263\n", max_mem >> 20);
 576                         memory_end = max_mem;
 577                 }
 578         }
 579 # endif                         /* CONFIG_ROMFS_FS */
 580
 581         /* Since the default MTD_UCLINUX has no magic number, we just blindly
 582          * read 8 past the end of the kernel's image, and look at it.
 583          * When no image is attached, mtd_size is set to a random number
 584          * Do some basic sanity checks before operating on things
 585          */
 586         if (mtd_size == 0 || memory_end <= mtd_size) {
 587                 pr_emerg("Could not find valid ram mtd attached.\n");
 588         } else {
 589                 memory_end -= mtd_size;
 590
 591                 /* Relocate MTD image to the top of memory after the uncached memory area */
 592                 uclinux_ram_map.phys = memory_mtd_start = memory_end;
 593                 uclinux_ram_map.size = mtd_size;
 594                 pr_info("Found mtd parition at 0x%p, (len=0x%lx), moving to 0x%p\n",
 595                         _end, mtd_size, (void *)memory_mtd_start);
 596                 dma_memcpy((void *)uclinux_ram_map.phys, _end, uclinux_ram_map.size);
 597         }
 598 #endif                          /* CONFIG_MTD_UCLINUX */
 599
 600         /* We need lo limit memory, since everything could have a text section
 601          * of userspace in it, and expose anomaly 05000263. If the anomaly
 602          * doesn't exist, or we don't need to - then dont.
 603          */
 604         if (memory_end > max_mem) {
 605                 pr_info("Limiting kernel memory to %liMB due to anomaly 05000263\n", max_mem >> 20);
 606                 memory_end = max_mem;
 607         }
 608
 609 #ifdef CONFIG_MPU
 610 #if defined(CONFIG_ROMFS_ON_MTD) && defined(CONFIG_MTD_ROM)
 611         page_mask_nelts = (((_ramend + ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE -
 612                                         ASYNC_BANK0_BASE) >> PAGE_SHIFT) + 31) / 32;
 613 #else
 614         page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32;
 615 #endif
 616         page_mask_order = get_order(3 * page_mask_nelts * sizeof(long));
 617 #endif
 618
 619         init_mm.start_code = (unsigned long)_stext;
 620         init_mm.end_code = (unsigned long)_etext;
 621         init_mm.end_data = (unsigned long)_edata;
 622         init_mm.brk = (unsigned long)0;
 623
 624         printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
 625         printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
 626
 627         printk(KERN_INFO "Memory map:\n"
 628                "  fixedcode = 0x%p-0x%p\n"
 629                "  text      = 0x%p-0x%p\n"
 630                "  rodata    = 0x%p-0x%p\n"
 631                "  bss       = 0x%p-0x%p\n"
 632                "  data      = 0x%p-0x%p\n"
 633                "    stack   = 0x%p-0x%p\n"
 634                "  init      = 0x%p-0x%p\n"
 635                "  available = 0x%p-0x%p\n"
 636 #ifdef CONFIG_MTD_UCLINUX
 637                "  rootfs    = 0x%p-0x%p\n"
 638 #endif
 639 #if DMA_UNCACHED_REGION > 0
 640                "  DMA Zone  = 0x%p-0x%p\n"
 641 #endif
 642                 , (void *)FIXED_CODE_START, (void *)FIXED_CODE_END,
 643                 _stext, _etext,
 644                 __start_rodata, __end_rodata,
 645                 __bss_start, __bss_stop,
 646                 _sdata, _edata,
 647                 (void *)&init_thread_union,
 648                 (void *)((int)(&init_thread_union) + THREAD_SIZE),
 649                 __init_begin, __init_end,
 650                 (void *)_ramstart, (void *)memory_end
 651 #ifdef CONFIG_MTD_UCLINUX
 652                 , (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
 653 #endif
 654 #if DMA_UNCACHED_REGION > 0
 655                 , (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
 656 #endif
 657                 );
 658 }
 659
 660 /*
 661  * Find the lowest, highest page frame number we have available
 662  */
 663 void __init find_min_max_pfn(void)
 664 {
 665         int i;
 666
 667         max_pfn = 0;
 668         min_low_pfn = memory_end;
 669
 670         for (i = 0; i < bfin_memmap.nr_map; i++) {
 671                 unsigned long start, end;
 672                 /* RAM? */
 673                 if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
 674                         continue;
 675                 start = PFN_UP(bfin_memmap.map[i].addr);
 676                 end = PFN_DOWN(bfin_memmap.map[i].addr +
 677                                 bfin_memmap.map[i].size);
 678                 if (start >= end)
 679                         continue;
 680                 if (end > max_pfn)
 681                         max_pfn = end;
 682                 if (start < min_low_pfn)
 683                         min_low_pfn = start;
 684         }
 685 }
 686
 687 static __init void setup_bootmem_allocator(void)
 688 {
 689         int bootmap_size;
 690         int i;
 691         unsigned long start_pfn, end_pfn;
 692         unsigned long curr_pfn, last_pfn, size;
 693
 694         /* mark memory between memory_start and memory_end usable */
 695         add_memory_region(memory_start,
 696                 memory_end - memory_start, BFIN_MEMMAP_RAM);
 697         /* sanity check for overlap */
 698         sanitize_memmap(bfin_memmap.map, &bfin_memmap.nr_map);
 699         print_memory_map("boot memmap");
 700
 701         /* initialize globals in linux/bootmem.h */
 702         find_min_max_pfn();
 703         /* pfn of the last usable page frame */
 704         if (max_pfn > memory_end >> PAGE_SHIFT)
 705                 max_pfn = memory_end >> PAGE_SHIFT;
 706         /* pfn of last page frame directly mapped by kernel */
 707         max_low_pfn = max_pfn;
 708         /* pfn of the first usable page frame after kernel image*/
 709         if (min_low_pfn < memory_start >> PAGE_SHIFT)
 710                 min_low_pfn = memory_start >> PAGE_SHIFT;
 711
 712         start_pfn = PAGE_OFFSET >> PAGE_SHIFT;
 713         end_pfn = memory_end >> PAGE_SHIFT;
 714
 715         /*
 716          * give all the memory to the bootmap allocator, tell it to put the
 717          * boot mem_map at the start of memory.
 718          */
 719         bootmap_size = init_bootmem_node(NODE_DATA(0),
 720                         memory_start >> PAGE_SHIFT,     /* map goes here */
 721                         start_pfn, end_pfn);
 722
 723         /* register the memmap regions with the bootmem allocator */
 724         for (i = 0; i < bfin_memmap.nr_map; i++) {
 725                 /*
 726                  * Reserve usable memory
 727                  */
 728                 if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
 729                         continue;
 730                 /*
 731                  * We are rounding up the start address of usable memory:
 732                  */
 733                 curr_pfn = PFN_UP(bfin_memmap.map[i].addr);
 734                 if (curr_pfn >= end_pfn)
 735                         continue;
 736                 /*
 737                  * ... and at the end of the usable range downwards:
 738                  */
 739                 last_pfn = PFN_DOWN(bfin_memmap.map[i].addr +
 740                                          bfin_memmap.map[i].size);
 741
 742                 if (last_pfn > end_pfn)
 743                         last_pfn = end_pfn;
 744
 745                 /*
 746                  * .. finally, did all the rounding and playing
 747                  * around just make the area go away?
 748                  */
 749                 if (last_pfn <= curr_pfn)
 750                         continue;
 751
 752                 size = last_pfn - curr_pfn;
 753                 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
 754         }
 755
 756         /* reserve memory before memory_start, including bootmap */
 757         reserve_bootmem(PAGE_OFFSET,
 758                 memory_start + bootmap_size + PAGE_SIZE - 1 - PAGE_OFFSET,
 759                 BOOTMEM_DEFAULT);
 760 }
 761
 762 #define EBSZ_TO_MEG(ebsz) \
 763 ({ \
 764         int meg = 0; \
 765         switch (ebsz & 0xf) { \
 766                 case 0x1: meg =  16; break; \
 767                 case 0x3: meg =  32; break; \
 768                 case 0x5: meg =  64; break; \
 769                 case 0x7: meg = 128; break; \
 770                 case 0x9: meg = 256; break; \
 771                 case 0xb: meg = 512; break; \
 772         } \
 773         meg; \
 774 })
 775 static inline int __init get_mem_size(void)
 776 {
 777 #if defined(EBIU_SDBCTL)
 778 # if defined(BF561_FAMILY)
 779         int ret = 0;
 780         u32 sdbctl = bfin_read_EBIU_SDBCTL();
 781         ret += EBSZ_TO_MEG(sdbctl >>  0);
 782         ret += EBSZ_TO_MEG(sdbctl >>  8);
 783         ret += EBSZ_TO_MEG(sdbctl >> 16);
 784         ret += EBSZ_TO_MEG(sdbctl >> 24);
 785         return ret;
 786 # else
 787         return EBSZ_TO_MEG(bfin_read_EBIU_SDBCTL());
 788 # endif
 789 #elif defined(EBIU_DDRCTL1)
 790         u32 ddrctl = bfin_read_EBIU_DDRCTL1();
 791         int ret = 0;
 792         switch (ddrctl & 0xc0000) {
 793                 case DEVSZ_64:  ret = 64 / 8;
 794                 case DEVSZ_128: ret = 128 / 8;
 795                 case DEVSZ_256: ret = 256 / 8;
 796                 case DEVSZ_512: ret = 512 / 8;
 797         }
 798         switch (ddrctl & 0x30000) {
 799                 case DEVWD_4:  ret *= 2;
 800                 case DEVWD_8:  ret *= 2;
 801                 case DEVWD_16: break;
 802         }
 803         if ((ddrctl & 0xc000) == 0x4000)
 804                 ret *= 2;
 805         return ret;
 806 #endif
 807         BUG();
 808 }
 809
 810 __attribute__((weak))
 811 void __init native_machine_early_platform_add_devices(void)
 812 {
 813 }
 814
 815 void __init setup_arch(char **cmdline_p)
 816 {
 817         unsigned long sclk, cclk;
 818
 819         native_machine_early_platform_add_devices();
 820
 821         enable_shadow_console();
 822
 823         /* Check to make sure we are running on the right processor */
 824         if (unlikely(CPUID != bfin_cpuid()))
 825                 printk(KERN_ERR "ERROR: Not running on ADSP-%s: unknown CPUID 0x%04x Rev 0.%d\n",
 826                         CPU, bfin_cpuid(), bfin_revid());
 827
 828 #ifdef CONFIG_DUMMY_CONSOLE
 829         conswitchp = &dummy_con;
 830 #endif
 831
 832 #if defined(CONFIG_CMDLINE_BOOL)
 833         strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
 834         command_line[sizeof(command_line) - 1] = 0;
 835 #endif
 836
 837         /* Keep a copy of command line */
 838         *cmdline_p = &command_line[0];
 839         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 840         boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
 841
 842         memset(&bfin_memmap, 0, sizeof(bfin_memmap));
 843
 844         /* If the user does not specify things on the command line, use
 845          * what the bootloader set things up as
 846          */
 847         physical_mem_end = 0;
 848         parse_cmdline_early(&command_line[0]);
 849
 850         if (_ramend == 0)
 851                 _ramend = get_mem_size() * 1024 * 1024;
 852
 853         if (physical_mem_end == 0)
 854                 physical_mem_end = _ramend;
 855
 856         memory_setup();
 857
 858         /* Initialize Async memory banks */
 859         bfin_write_EBIU_AMBCTL0(AMBCTL0VAL);
 860         bfin_write_EBIU_AMBCTL1(AMBCTL1VAL);
 861         bfin_write_EBIU_AMGCTL(AMGCTLVAL);
 862 #ifdef CONFIG_EBIU_MBSCTLVAL
 863         bfin_write_EBIU_MBSCTL(CONFIG_EBIU_MBSCTLVAL);
 864         bfin_write_EBIU_MODE(CONFIG_EBIU_MODEVAL);
 865         bfin_write_EBIU_FCTL(CONFIG_EBIU_FCTLVAL);
 866 #endif
 867 #ifdef CONFIG_BFIN_HYSTERESIS_CONTROL
 868         bfin_write_PORTF_HYSTERISIS(HYST_PORTF_0_15);
 869         bfin_write_PORTG_HYSTERISIS(HYST_PORTG_0_15);
 870         bfin_write_PORTH_HYSTERISIS(HYST_PORTH_0_15);
 871         bfin_write_MISCPORT_HYSTERISIS((bfin_read_MISCPORT_HYSTERISIS() &
 872                                         ~HYST_NONEGPIO_MASK) | HYST_NONEGPIO);
 873 #endif
 874
 875         cclk = get_cclk();
 876         sclk = get_sclk();
 877
 878         if ((ANOMALY_05000273 || ANOMALY_05000274) && (cclk >> 1) < sclk)
 879                 panic("ANOMALY 05000273 or 05000274: CCLK must be >= 2*SCLK");
 880
 881 #ifdef BF561_FAMILY
 882         if (ANOMALY_05000266) {
 883                 bfin_read_IMDMA_D0_IRQ_STATUS();
 884                 bfin_read_IMDMA_D1_IRQ_STATUS();
 885         }
 886 #endif
 887         printk(KERN_INFO "Hardware Trace ");
 888         if (bfin_read_TBUFCTL() & 0x1)
 889                 printk(KERN_CONT "Active ");
 890         else
 891                 printk(KERN_CONT "Off ");
 892         if (bfin_read_TBUFCTL() & 0x2)
 893                 printk(KERN_CONT "and Enabled\n");
 894         else
 895                 printk(KERN_CONT "and Disabled\n");
 896
 897         printk(KERN_INFO "Boot Mode: %i\n", bfin_read_SYSCR() & 0xF);
 898
 899         /* Newer parts mirror SWRST bits in SYSCR */
 900 #if defined(CONFIG_BF53x) || defined(CONFIG_BF561) || \
 901     defined(CONFIG_BF538) || defined(CONFIG_BF539)
 902         _bfin_swrst = bfin_read_SWRST();
 903 #else
 904         /* Clear boot mode field */
 905         _bfin_swrst = bfin_read_SYSCR() & ~0xf;
 906 #endif
 907
 908 #ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
 909         bfin_write_SWRST(_bfin_swrst & ~DOUBLE_FAULT);
 910 #endif
 911 #ifdef CONFIG_DEBUG_DOUBLEFAULT_RESET
 912         bfin_write_SWRST(_bfin_swrst | DOUBLE_FAULT);
 913 #endif
 914
 915 #ifdef CONFIG_SMP
 916         if (_bfin_swrst & SWRST_DBL_FAULT_A) {
 917 #else
 918         if (_bfin_swrst & RESET_DOUBLE) {
 919 #endif
 920                 printk(KERN_EMERG "Recovering from DOUBLE FAULT event\n");
 921 #ifdef CONFIG_DEBUG_DOUBLEFAULT
 922                 /* We assume the crashing kernel, and the current symbol table match */
 923                 printk(KERN_EMERG " While handling exception (EXCAUSE = 0x%x) at %pF\n",
 924                         (int)init_saved_seqstat & SEQSTAT_EXCAUSE, init_saved_retx);
 925                 printk(KERN_NOTICE "   DCPLB_FAULT_ADDR: %pF\n", init_saved_dcplb_fault_addr);
 926                 printk(KERN_NOTICE "   ICPLB_FAULT_ADDR: %pF\n", init_saved_icplb_fault_addr);
 927 #endif
 928                 printk(KERN_NOTICE " The instruction at %pF caused a double exception\n",
 929                         init_retx);
 930         } else if (_bfin_swrst & RESET_WDOG)
 931                 printk(KERN_INFO "Recovering from Watchdog event\n");
 932         else if (_bfin_swrst & RESET_SOFTWARE)
 933                 printk(KERN_NOTICE "Reset caused by Software reset\n");
 934
 935         printk(KERN_INFO "Blackfin support (C) 2004-2010 Analog Devices, Inc.\n");
 936         if (bfin_compiled_revid() == 0xffff)
 937                 printk(KERN_INFO "Compiled for ADSP-%s Rev any, running on 0.%d\n", CPU, bfin_revid());
 938         else if (bfin_compiled_revid() == -1)
 939                 printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
 940         else
 941                 printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
 942
 943         if (likely(CPUID == bfin_cpuid())) {
 944                 if (bfin_revid() != bfin_compiled_revid()) {
 945                         if (bfin_compiled_revid() == -1)
 946                                 printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
 947                                        bfin_revid());
 948                         else if (bfin_compiled_revid() != 0xffff) {
 949                                 printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
 950                                        bfin_compiled_revid(), bfin_revid());
 951                                 if (bfin_compiled_revid() > bfin_revid())
 952                                         panic("Error: you are missing anomaly workarounds for this rev");
 953                         }
 954                 }
 955                 if (bfin_revid() < CONFIG_BF_REV_MIN || bfin_revid() > CONFIG_BF_REV_MAX)
 956                         printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
 957                                CPU, bfin_revid());
 958         }
 959
 960         printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
 961
 962         printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
 963                cclk / 1000000, sclk / 1000000);
 964
 965         setup_bootmem_allocator();
 966
 967         paging_init();
 968
 969         /* Copy atomic sequences to their fixed location, and sanity check that
 970            these locations are the ones that we advertise to userspace.  */
 971         memcpy((void *)FIXED_CODE_START, &fixed_code_start,
 972                FIXED_CODE_END - FIXED_CODE_START);
 973         BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
 974                != SIGRETURN_STUB - FIXED_CODE_START);
 975         BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
 976                != ATOMIC_XCHG32 - FIXED_CODE_START);
 977         BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
 978                != ATOMIC_CAS32 - FIXED_CODE_START);
 979         BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
 980                != ATOMIC_ADD32 - FIXED_CODE_START);
 981         BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
 982                != ATOMIC_SUB32 - FIXED_CODE_START);
 983         BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
 984                != ATOMIC_IOR32 - FIXED_CODE_START);
 985         BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
 986                != ATOMIC_AND32 - FIXED_CODE_START);
 987         BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
 988                != ATOMIC_XOR32 - FIXED_CODE_START);
 989         BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
 990                 != SAFE_USER_INSTRUCTION - FIXED_CODE_START);
 991
 992 #ifdef CONFIG_SMP
 993         platform_init_cpus();
 994 #endif
 995         init_exception_vectors();
 996         bfin_cache_init();      /* Initialize caches for the boot CPU */
 997 }
 998
 999 static int __init topology_init(void)
1000 {
1001         unsigned int cpu;
1002         /* Record CPU-private information for the boot processor. */
1003         bfin_setup_cpudata(0);
1004
1005         for_each_possible_cpu(cpu) {
1006                 register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu);
1007         }
1008
1009         return 0;
1010 }
1011
1012 subsys_initcall(topology_init);
1013
1014 /* Get the input clock frequency */
1015 static u_long cached_clkin_hz = CONFIG_CLKIN_HZ;
1016 static u_long get_clkin_hz(void)
1017 {
1018         return cached_clkin_hz;
1019 }
1020 static int __init early_init_clkin_hz(char *buf)
1021 {
1022         cached_clkin_hz = simple_strtoul(buf, NULL, 0);
1023 #ifdef BFIN_KERNEL_CLOCK
1024         if (cached_clkin_hz != CONFIG_CLKIN_HZ)
1025                 panic("cannot change clkin_hz when reprogramming clocks");
1026 #endif
1027         return 1;
1028 }
1029 early_param("clkin_hz=", early_init_clkin_hz);
1030
1031 /* Get the voltage input multiplier */
1032 static u_long get_vco(void)
1033 {
1034         static u_long cached_vco;
1035         u_long msel, pll_ctl;
1036
1037         /* The assumption here is that VCO never changes at runtime.
1038          * If, someday, we support that, then we'll have to change this.
1039          */
1040         if (cached_vco)
1041                 return cached_vco;
1042
1043         pll_ctl = bfin_read_PLL_CTL();
1044         msel = (pll_ctl >> 9) & 0x3F;
1045         if (0 == msel)
1046                 msel = 64;
1047
1048         cached_vco = get_clkin_hz();
1049         cached_vco >>= (1 & pll_ctl);   /* DF bit */
1050         cached_vco *= msel;
1051         return cached_vco;
1052 }
1053
1054 /* Get the Core clock */
1055 u_long get_cclk(void)
1056 {
1057         static u_long cached_cclk_pll_div, cached_cclk;
1058         u_long csel, ssel;
1059
1060         if (bfin_read_PLL_STAT() & 0x1)
1061                 return get_clkin_hz();
1062
1063         ssel = bfin_read_PLL_DIV();
1064         if (ssel == cached_cclk_pll_div)
1065                 return cached_cclk;
1066         else
1067                 cached_cclk_pll_div = ssel;
1068
1069         csel = ((ssel >> 4) & 0x03);
1070         ssel &= 0xf;
1071         if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
1072                 cached_cclk = get_vco() / ssel;
1073         else
1074                 cached_cclk = get_vco() >> csel;
1075         return cached_cclk;
1076 }
1077 EXPORT_SYMBOL(get_cclk);
1078
1079 /* Get the System clock */
1080 u_long get_sclk(void)
1081 {
1082         static u_long cached_sclk;
1083         u_long ssel;
1084
1085         /* The assumption here is that SCLK never changes at runtime.
1086          * If, someday, we support that, then we'll have to change this.
1087          */
1088         if (cached_sclk)
1089                 return cached_sclk;
1090
1091         if (bfin_read_PLL_STAT() & 0x1)
1092                 return get_clkin_hz();
1093
1094         ssel = bfin_read_PLL_DIV() & 0xf;
1095         if (0 == ssel) {
1096                 printk(KERN_WARNING "Invalid System Clock\n");
1097                 ssel = 1;
1098         }
1099
1100         cached_sclk = get_vco() / ssel;
1101         return cached_sclk;
1102 }
1103 EXPORT_SYMBOL(get_sclk);
1104
1105 unsigned long sclk_to_usecs(unsigned long sclk)
1106 {
1107         u64 tmp = USEC_PER_SEC * (u64)sclk;
1108         do_div(tmp, get_sclk());
1109         return tmp;
1110 }
1111 EXPORT_SYMBOL(sclk_to_usecs);
1112
1113 unsigned long usecs_to_sclk(unsigned long usecs)
1114 {
1115         u64 tmp = get_sclk() * (u64)usecs;
1116         do_div(tmp, USEC_PER_SEC);
1117         return tmp;
1118 }
1119 EXPORT_SYMBOL(usecs_to_sclk);
1120
1121 /*
1122  *      Get CPU information for use by the procfs.
1123  */
1124 static int show_cpuinfo(struct seq_file *m, void *v)
1125 {
1126         char *cpu, *mmu, *fpu, *vendor, *cache;
1127         uint32_t revid;
1128         int cpu_num = *(unsigned int *)v;
1129         u_long sclk, cclk;
1130         u_int icache_size = BFIN_ICACHESIZE / 1024, dcache_size = 0, dsup_banks = 0;
1131         struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, cpu_num);
1132
1133         cpu = CPU;
1134         mmu = "none";
1135         fpu = "none";
1136         revid = bfin_revid();
1137
1138         sclk = get_sclk();
1139         cclk = get_cclk();
1140
1141         switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
1142         case 0xca:
1143                 vendor = "Analog Devices";
1144                 break;
1145         default:
1146                 vendor = "unknown";
1147                 break;
1148         }
1149
1150         seq_printf(m, "processor\t: %d\n" "vendor_id\t: %s\n", cpu_num, vendor);
1151
1152         if (CPUID == bfin_cpuid())
1153                 seq_printf(m, "cpu family\t: 0x%04x\n", CPUID);
1154         else
1155                 seq_printf(m, "cpu family\t: Compiled for:0x%04x, running on:0x%04x\n",
1156                         CPUID, bfin_cpuid());
1157
1158         seq_printf(m, "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n"
1159                 "stepping\t: %d ",
1160                 cpu, cclk/1000000, sclk/1000000,
1161 #ifdef CONFIG_MPU
1162                 "mpu on",
1163 #else
1164                 "mpu off",
1165 #endif
1166                 revid);
1167
1168         if (bfin_revid() != bfin_compiled_revid()) {
1169                 if (bfin_compiled_revid() == -1)
1170                         seq_printf(m, "(Compiled for Rev none)");
1171                 else if (bfin_compiled_revid() == 0xffff)
1172                         seq_printf(m, "(Compiled for Rev any)");
1173                 else
1174                         seq_printf(m, "(Compiled for Rev %d)", bfin_compiled_revid());
1175         }
1176
1177         seq_printf(m, "\ncpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
1178                 cclk/1000000, cclk%1000000,
1179                 sclk/1000000, sclk%1000000);
1180         seq_printf(m, "bogomips\t: %lu.%02lu\n"
1181                 "Calibration\t: %lu loops\n",
1182                 (loops_per_jiffy * HZ) / 500000,
1183                 ((loops_per_jiffy * HZ) / 5000) % 100,
1184                 (loops_per_jiffy * HZ));
1185
1186         /* Check Cache configutation */
1187         switch (cpudata->dmemctl & (1 << DMC0_P | 1 << DMC1_P)) {
1188         case ACACHE_BSRAM:
1189                 cache = "dbank-A/B\t: cache/sram";
1190                 dcache_size = 16;
1191                 dsup_banks = 1;
1192                 break;
1193         case ACACHE_BCACHE:
1194                 cache = "dbank-A/B\t: cache/cache";
1195                 dcache_size = 32;
1196                 dsup_banks = 2;
1197                 break;
1198         case ASRAM_BSRAM:
1199                 cache = "dbank-A/B\t: sram/sram";
1200                 dcache_size = 0;
1201                 dsup_banks = 0;
1202                 break;
1203         default:
1204                 cache = "unknown";
1205                 dcache_size = 0;
1206                 dsup_banks = 0;
1207                 break;
1208         }
1209
1210         /* Is it turned on? */
1211         if ((cpudata->dmemctl & (ENDCPLB | DMC_ENABLE)) != (ENDCPLB | DMC_ENABLE))
1212                 dcache_size = 0;
1213
1214         if ((cpudata->imemctl & (IMC | ENICPLB)) != (IMC | ENICPLB))
1215                 icache_size = 0;
1216
1217         seq_printf(m, "cache size\t: %d KB(L1 icache) "
1218                 "%d KB(L1 dcache) %d KB(L2 cache)\n",
1219                 icache_size, dcache_size, 0);
1220         seq_printf(m, "%s\n", cache);
1221         seq_printf(m, "external memory\t: "
1222 #if defined(CONFIG_BFIN_EXTMEM_ICACHEABLE)
1223                    "cacheable"
1224 #else
1225                    "uncacheable"
1226 #endif
1227                    " in instruction cache\n");
1228         seq_printf(m, "external memory\t: "
1229 #if defined(CONFIG_BFIN_EXTMEM_WRITEBACK)
1230                       "cacheable (write-back)"
1231 #elif defined(CONFIG_BFIN_EXTMEM_WRITETHROUGH)
1232                       "cacheable (write-through)"
1233 #else
1234                       "uncacheable"
1235 #endif
1236                       " in data cache\n");
1237
1238         if (icache_size)
1239                 seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
1240                            BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
1241         else
1242                 seq_printf(m, "icache setup\t: off\n");
1243
1244         seq_printf(m,
1245                    "dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
1246                    dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
1247                    BFIN_DLINES);
1248 #ifdef __ARCH_SYNC_CORE_DCACHE
1249         seq_printf(m, "SMP Dcache Flushes\t: %lu\n\n", dcache_invld_count[cpu_num]);
1250 #endif
1251 #ifdef __ARCH_SYNC_CORE_ICACHE
1252         seq_printf(m, "SMP Icache Flushes\t: %lu\n\n", icache_invld_count[cpu_num]);
1253 #endif
1254
1255         if (cpu_num != num_possible_cpus() - 1)
1256                 return 0;
1257
1258         if (L2_LENGTH) {
1259                 seq_printf(m, "L2 SRAM\t\t: %dKB\n", L2_LENGTH/0x400);
1260                 seq_printf(m, "L2 SRAM\t\t: "
1261 #if defined(CONFIG_BFIN_L2_ICACHEABLE)
1262                               "cacheable"
1263 #else
1264                               "uncacheable"
1265 #endif
1266                               " in instruction cache\n");
1267                 seq_printf(m, "L2 SRAM\t\t: "
1268 #if defined(CONFIG_BFIN_L2_WRITEBACK)
1269                               "cacheable (write-back)"
1270 #elif defined(CONFIG_BFIN_L2_WRITETHROUGH)
1271                               "cacheable (write-through)"
1272 #else
1273                               "uncacheable"
1274 #endif
1275                               " in data cache\n");
1276         }
1277         seq_printf(m, "board name\t: %s\n", bfin_board_name);
1278         seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
1279                  physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
1280         seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
1281                 ((int)memory_end - (int)_rambase) >> 10,
1282                 (void *)_rambase,
1283                 (void *)memory_end);
1284         seq_printf(m, "\n");
1285
1286         return 0;
1287 }
1288
1289 static void *c_start(struct seq_file *m, loff_t *pos)
1290 {
1291         if (*pos == 0)
1292                 *pos = first_cpu(cpu_online_map);
1293         if (*pos >= num_online_cpus())
1294                 return NULL;
1295
1296         return pos;
1297 }
1298
1299 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1300 {
1301         *pos = next_cpu(*pos, cpu_online_map);
1302
1303         return c_start(m, pos);
1304 }
1305
1306 static void c_stop(struct seq_file *m, void *v)
1307 {
1308 }
1309
1310 const struct seq_operations cpuinfo_op = {
1311         .start = c_start,
1312         .next = c_next,
1313         .stop = c_stop,
1314         .show = show_cpuinfo,
1315 };
1316
1317 void __init cmdline_init(const char *r0)
1318 {
1319         early_shadow_stamp();
1320         if (r0)
1321                 strncpy(command_line, r0, COMMAND_LINE_SIZE);
1322 }