arch/sh/kernel/setup.c

   1 /* $Id: setup.c,v 1.30 2003/10/13 07:21:19 lethal Exp $
   2  *
   3  *  linux/arch/sh/kernel/setup.c
   4  *
   5  *  Copyright (C) 1999  Niibe Yutaka
   6  *  Copyright (C) 2002, 2003  Paul Mundt
   7  */
   8
   9 /*
  10  * This file handles the architecture-dependent parts of initialization
  11  */
  12
  13 #include <linux/tty.h>
  14 #include <linux/ioport.h>
  15 #include <linux/init.h>
  16 #include <linux/initrd.h>
  17 #include <linux/bootmem.h>
  18 #include <linux/console.h>
  19 #include <linux/seq_file.h>
  20 #include <linux/root_dev.h>
  21 #include <linux/utsname.h>
  22 #include <linux/cpu.h>
  23 #include <asm/uaccess.h>
  24 #include <asm/io.h>
  25 #include <asm/io_generic.h>
  26 #include <asm/sections.h>
  27 #include <asm/irq.h>
  28 #ifdef CONFIG_SH_EARLY_PRINTK
  29 #include <asm/sh_bios.h>
  30 #endif
  31
  32 #ifdef CONFIG_SH_KGDB
  33 #include <asm/kgdb.h>
  34 static int kgdb_parse_options(char *options);
  35 #endif
  36
  37 /*
  38  * Machine setup..
  39  */
  40
  41 /*
  42  * Initialize loops_per_jiffy as 10000000 (1000MIPS).
  43  * This value will be used at the very early stage of serial setup.
  44  * The bigger value means no problem.
  45  */
  46 struct sh_cpuinfo boot_cpu_data = { CPU_SH_NONE, 0, 10000000, };
  47 struct screen_info screen_info;
  48 unsigned char aux_device_present = 0xaa;
  49
  50 #if defined(CONFIG_SH_UNKNOWN)
  51 struct sh_machine_vector sh_mv;
  52 #endif
  53
  54 /* We need this to satisfy some external references. */
  55 struct screen_info screen_info = {
  56         0, 25,                  /* orig-x, orig-y */
  57         0,                      /* unused */
  58         0,                      /* orig-video-page */
  59         0,                      /* orig-video-mode */
  60         80,                     /* orig-video-cols */
  61         0,0,0,                  /* ega_ax, ega_bx, ega_cx */
  62         25,                     /* orig-video-lines */
  63         0,                      /* orig-video-isVGA */
  64         16                      /* orig-video-points */
  65 };
  66
  67 extern void platform_setup(void);
  68 extern char *get_system_type(void);
  69 extern int root_mountflags;
  70
  71 #define MV_NAME_SIZE 32
  72
  73 static struct sh_machine_vector* __init get_mv_byname(const char* name);
  74
  75 /*
  76  * This is set up by the setup-routine at boot-time
  77  */
  78 #define PARAM   ((unsigned char *)empty_zero_page)
  79
  80 #define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
  81 #define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
  82 #define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
  83 #define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
  84 #define INITRD_START (*(unsigned long *) (PARAM+0x010))
  85 #define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
  86 /* ... */
  87 #define COMMAND_LINE ((char *) (PARAM+0x100))
  88 #define COMMAND_LINE_SIZE 256
  89
  90 #define RAMDISK_IMAGE_START_MASK        0x07FF
  91 #define RAMDISK_PROMPT_FLAG             0x8000
  92 #define RAMDISK_LOAD_FLAG               0x4000
  93
  94 static char command_line[COMMAND_LINE_SIZE] = { 0, };
  95        char saved_command_line[COMMAND_LINE_SIZE];
  96
  97 struct resource standard_io_resources[] = {
  98         { "dma1", 0x00, 0x1f },
  99         { "pic1", 0x20, 0x3f },
 100         { "timer", 0x40, 0x5f },
 101         { "keyboard", 0x60, 0x6f },
 102         { "dma page reg", 0x80, 0x8f },
 103         { "pic2", 0xa0, 0xbf },
 104         { "dma2", 0xc0, 0xdf },
 105         { "fpu", 0xf0, 0xff }
 106 };
 107
 108 #define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource))
 109
 110 /* System RAM - interrupted by the 640kB-1M hole */
 111 #define code_resource (ram_resources[3])
 112 #define data_resource (ram_resources[4])
 113 static struct resource ram_resources[] = {
 114         { "System RAM", 0x000000, 0x09ffff, IORESOURCE_BUSY },
 115         { "System RAM", 0x100000, 0x100000, IORESOURCE_BUSY },
 116         { "Video RAM area", 0x0a0000, 0x0bffff },
 117         { "Kernel code", 0x100000, 0 },
 118         { "Kernel data", 0, 0 }
 119 };
 120
 121 unsigned long memory_start, memory_end;
 122
 123 /* XXX: MRB-remove - blatant hack */
 124 #if 1
 125 #define SCIF_REG        0xffe80000
 126
 127 static void scif_sercon_putc(int c)
 128 {
 129         while (!(ctrl_inw(SCIF_REG + 0x10) & 0x20)) ;
 130
 131         ctrl_outb(c, SCIF_REG + 12);
 132         ctrl_outw((ctrl_inw(SCIF_REG + 0x10) & 0x9f), SCIF_REG + 0x10);
 133
 134         if (c == '\n')
 135                 scif_sercon_putc('\r');
 136 }
 137
 138 static void scif_sercon_flush(void)
 139 {
 140         ctrl_outw((ctrl_inw(SCIF_REG + 0x10) & 0xbf), SCIF_REG + 0x10);
 141
 142         while (!(ctrl_inw(SCIF_REG + 0x10) & 0x40)) ;
 143
 144         ctrl_outw((ctrl_inw(SCIF_REG + 0x10) & 0xbf), SCIF_REG + 0x10);
 145 }
 146
 147 static void scif_sercon_write(struct console *con, const char *s, unsigned count)
 148 {
 149         while (count-- > 0)
 150                 scif_sercon_putc(*s++);
 151
 152         scif_sercon_flush();
 153 }
 154
 155 static int __init scif_sercon_setup(struct console *con, char *options)
 156 {
 157         con->cflag = CREAD | HUPCL | CLOCAL | B57600 | CS8;
 158
 159         return 0;
 160 }
 161
 162 static struct console scif_sercon = {
 163         .name           = "sercon",
 164         .write          = scif_sercon_write,
 165         .setup          = scif_sercon_setup,
 166         .flags          = CON_PRINTBUFFER,
 167         .index          = -1,
 168 };
 169
 170 void scif_sercon_init(int baud)
 171 {
 172         ctrl_outw(0, SCIF_REG + 8);
 173         ctrl_outw(0, SCIF_REG);
 174
 175         /* Set baud rate */
 176         ctrl_outb((50000000 / (32 * baud)) - 1, SCIF_REG + 4);
 177
 178         ctrl_outw(12, SCIF_REG + 24);
 179         ctrl_outw(8, SCIF_REG + 24);
 180         ctrl_outw(0, SCIF_REG + 32);
 181         ctrl_outw(0x60, SCIF_REG + 16);
 182         ctrl_outw(0, SCIF_REG + 36);
 183         ctrl_outw(0x30, SCIF_REG + 8);
 184
 185         register_console(&scif_sercon);
 186 }
 187
 188 void scif_sercon_unregister(void)
 189 {
 190         unregister_console(&scif_sercon);
 191 }
 192 #endif
 193
 194 #ifdef CONFIG_SH_EARLY_PRINTK
 195 /*
 196  *      Print a string through the BIOS
 197  */
 198 static void sh_console_write(struct console *co, const char *s,
 199                                  unsigned count)
 200 {
 201         sh_bios_console_write(s, count);
 202 }
 203
 204 /*
 205  *      Setup initial baud/bits/parity. We do two things here:
 206  *      - construct a cflag setting for the first rs_open()
 207  *      - initialize the serial port
 208  *      Return non-zero if we didn't find a serial port.
 209  */
 210 static int __init sh_console_setup(struct console *co, char *options)
 211 {
 212         int     cflag = CREAD | HUPCL | CLOCAL;
 213
 214         /*
 215          *      Now construct a cflag setting.
 216          *      TODO: this is a totally bogus cflag, as we have
 217          *      no idea what serial settings the BIOS is using, or
 218          *      even if its using the serial port at all.
 219          */
 220         cflag |= B115200 | CS8 | /*no parity*/0;
 221
 222         co->cflag = cflag;
 223
 224         return 0;
 225 }
 226
 227 static struct console sh_console = {
 228         .name           = "bios",
 229         .write          = sh_console_write,
 230         .setup          = sh_console_setup,
 231         .flags          = CON_PRINTBUFFER,
 232         .index          = -1,
 233 };
 234
 235 void sh_console_init(void)
 236 {
 237         register_console(&sh_console);
 238 }
 239
 240 void sh_console_unregister(void)
 241 {
 242         unregister_console(&sh_console);
 243 }
 244
 245 #endif
 246
 247 static inline void parse_cmdline (char ** cmdline_p, char mv_name[MV_NAME_SIZE],
 248                                   struct sh_machine_vector** mvp,
 249                                   unsigned long *mv_io_base,
 250                                   int *mv_mmio_enable)
 251 {
 252         char c = ' ', *to = command_line, *from = COMMAND_LINE;
 253         int len = 0;
 254
 255         /* Save unparsed command line copy for /proc/cmdline */
 256         memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
 257         saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
 258
 259         memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
 260         memory_end = memory_start + __MEMORY_SIZE;
 261
 262         for (;;) {
 263                 /*
 264                  * "mem=XXX[kKmM]" defines a size of memory.
 265                  */
 266                 if (c == ' ' && !memcmp(from, "mem=", 4)) {
 267                         if (to != command_line)
 268                                 to--;
 269                         {
 270                                 unsigned long mem_size;
 271
 272                                 mem_size = memparse(from+4, &from);
 273                                 memory_end = memory_start + mem_size;
 274                         }
 275                 }
 276                 if (c == ' ' && !memcmp(from, "sh_mv=", 6)) {
 277                         char* mv_end;
 278                         char* mv_comma;
 279                         int mv_len;
 280                         if (to != command_line)
 281                                 to--;
 282                         from += 6;
 283                         mv_end = strchr(from, ' ');
 284                         if (mv_end == NULL)
 285                                 mv_end = from + strlen(from);
 286
 287                         mv_comma = strchr(from, ',');
 288                         if ((mv_comma != NULL) && (mv_comma < mv_end)) {
 289                                 int ints[3];
 290                                 get_options(mv_comma+1, ARRAY_SIZE(ints), ints);
 291                                 *mv_io_base = ints[1];
 292                                 *mv_mmio_enable = ints[2];
 293                                 mv_len = mv_comma - from;
 294                         } else {
 295                                 mv_len = mv_end - from;
 296                         }
 297                         if (mv_len > (MV_NAME_SIZE-1))
 298                                 mv_len = MV_NAME_SIZE-1;
 299                         memcpy(mv_name, from, mv_len);
 300                         mv_name[mv_len] = '\0';
 301                         from = mv_end;
 302
 303                         *mvp = get_mv_byname(mv_name);
 304                 }
 305                 c = *(from++);
 306                 if (!c)
 307                         break;
 308                 if (COMMAND_LINE_SIZE <= ++len)
 309                         break;
 310                 *(to++) = c;
 311         }
 312         *to = '\0';
 313         *cmdline_p = command_line;
 314 }
 315
 316 static int __init sh_mv_setup(char **cmdline_p)
 317 {
 318 #if defined(CONFIG_SH_UNKNOWN)
 319         extern struct sh_machine_vector mv_unknown;
 320 #endif
 321         struct sh_machine_vector *mv = NULL;
 322         char mv_name[MV_NAME_SIZE] = "";
 323         unsigned long mv_io_base = 0;
 324         int mv_mmio_enable = 0;
 325
 326         parse_cmdline(cmdline_p, mv_name, &mv, &mv_io_base, &mv_mmio_enable);
 327
 328 #ifdef CONFIG_CMDLINE_BOOL
 329         sprintf(*cmdline_p, CONFIG_CMDLINE);
 330 #endif
 331
 332 #ifdef CONFIG_SH_GENERIC
 333         if (mv == NULL) {
 334                 mv = &mv_unknown;
 335                 if (*mv_name != '\0') {
 336                         printk("Warning: Unsupported machine %s, using unknown\n",
 337                                mv_name);
 338                 }
 339         }
 340         sh_mv = *mv;
 341 #endif
 342 #ifdef CONFIG_SH_UNKNOWN
 343         sh_mv = mv_unknown;
 344 #endif
 345
 346         /*
 347          * Manually walk the vec, fill in anything that the board hasn't yet
 348          * by hand, wrapping to the generic implementation.
 349          */
 350 #define mv_set(elem) do { \
 351         if (!sh_mv.mv_##elem) \
 352                 sh_mv.mv_##elem = generic_##elem; \
 353 } while (0)
 354
 355         mv_set(inb);    mv_set(inw);    mv_set(inl);
 356         mv_set(outb);   mv_set(outw);   mv_set(outl);
 357
 358         mv_set(inb_p);  mv_set(inw_p);  mv_set(inl_p);
 359         mv_set(outb_p); mv_set(outw_p); mv_set(outl_p);
 360
 361         mv_set(insb);   mv_set(insw);   mv_set(insl);
 362         mv_set(outsb);  mv_set(outsw);  mv_set(outsl);
 363
 364         mv_set(readb);  mv_set(readw);  mv_set(readl);
 365         mv_set(writeb); mv_set(writew); mv_set(writel);
 366
 367         mv_set(ioremap);
 368         mv_set(iounmap);
 369
 370         mv_set(isa_port2addr);
 371         mv_set(irq_demux);
 372
 373 #ifdef CONFIG_SH_UNKNOWN
 374         __set_io_port_base(mv_io_base);
 375 #endif
 376
 377         return 0;
 378 }
 379
 380 void __init setup_arch(char **cmdline_p)
 381 {
 382         unsigned long bootmap_size;
 383         unsigned long start_pfn, max_pfn, max_low_pfn;
 384
 385 /* XXX: MRB-remove */
 386 #if 0
 387         scif_sercon_init(57600);
 388 #endif
 389 #ifdef CONFIG_SH_EARLY_PRINTK
 390         sh_console_init();
 391 #endif
 392
 393         ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
 394
 395 #ifdef CONFIG_BLK_DEV_RAM
 396         rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
 397         rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
 398         rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
 399 #endif
 400
 401         if (!MOUNT_ROOT_RDONLY)
 402                 root_mountflags &= ~MS_RDONLY;
 403         init_mm.start_code = (unsigned long) _text;
 404         init_mm.end_code = (unsigned long) _etext;
 405         init_mm.end_data = (unsigned long) _edata;
 406         init_mm.brk = (unsigned long) _end;
 407
 408         code_resource.start = virt_to_bus(_text);
 409         code_resource.end = virt_to_bus(_etext)-1;
 410         data_resource.start = virt_to_bus(_etext);
 411         data_resource.end = virt_to_bus(_edata)-1;
 412
 413         sh_mv_setup(cmdline_p);
 414
 415 #define PFN_UP(x)       (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
 416 #define PFN_DOWN(x)     ((x) >> PAGE_SHIFT)
 417 #define PFN_PHYS(x)     ((x) << PAGE_SHIFT)
 418
 419 #ifdef CONFIG_DISCONTIGMEM
 420         NODE_DATA(0)->bdata = &discontig_node_bdata[0];
 421         NODE_DATA(1)->bdata = &discontig_node_bdata[1];
 422
 423         bootmap_size = init_bootmem_node(NODE_DATA(1),
 424                                          PFN_UP(__MEMORY_START_2ND),
 425                                          PFN_UP(__MEMORY_START_2ND),
 426                                          PFN_DOWN(__MEMORY_START_2ND+__MEMORY_SIZE_2ND));
 427         free_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, __MEMORY_SIZE_2ND);
 428         reserve_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, bootmap_size);
 429 #endif
 430
 431         /*
 432          * Find the highest page frame number we have available
 433          */
 434         max_pfn = PFN_DOWN(__pa(memory_end));
 435
 436         /*
 437          * Determine low and high memory ranges:
 438          */
 439         max_low_pfn = max_pfn;
 440
 441         /*
 442          * Partially used pages are not usable - thus
 443          * we are rounding upwards:
 444          */
 445         start_pfn = PFN_UP(__pa(_end));
 446
 447         /*
 448          * Find a proper area for the bootmem bitmap. After this
 449          * bootstrap step all allocations (until the page allocator
 450          * is intact) must be done via bootmem_alloc().
 451          */
 452         bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
 453                                          __MEMORY_START>>PAGE_SHIFT,
 454                                          max_low_pfn);
 455         /*
 456          * Register fully available low RAM pages with the bootmem allocator.
 457          */
 458         {
 459                 unsigned long curr_pfn, last_pfn, pages;
 460
 461                 /*
 462                  * We are rounding up the start address of usable memory:
 463                  */
 464                 curr_pfn = PFN_UP(__MEMORY_START);
 465                 /*
 466                  * ... and at the end of the usable range downwards:
 467                  */
 468                 last_pfn = PFN_DOWN(__pa(memory_end));
 469
 470                 if (last_pfn > max_low_pfn)
 471                         last_pfn = max_low_pfn;
 472
 473                 pages = last_pfn - curr_pfn;
 474                 free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn),
 475                                   PFN_PHYS(pages));
 476         }
 477
 478         /*
 479          * Reserve the kernel text and
 480          * Reserve the bootmem bitmap. We do this in two steps (first step
 481          * was init_bootmem()), because this catches the (definitely buggy)
 482          * case of us accidentally initializing the bootmem allocator with
 483          * an invalid RAM area.
 484          */
 485         reserve_bootmem_node(NODE_DATA(0), __MEMORY_START+PAGE_SIZE,
 486                 (PFN_PHYS(start_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);
 487
 488         /*
 489          * reserve physical page 0 - it's a special BIOS page on many boxes,
 490          * enabling clean reboots, SMP operation, laptop functions.
 491          */
 492         reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE);
 493
 494 #ifdef CONFIG_BLK_DEV_INITRD
 495         if (LOADER_TYPE && INITRD_START) {
 496                 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
 497                         reserve_bootmem_node(NODE_DATA(0), INITRD_START+__MEMORY_START, INITRD_SIZE);
 498                         initrd_start =
 499                                 INITRD_START ? INITRD_START + PAGE_OFFSET + __MEMORY_START : 0;
 500                         initrd_end = initrd_start + INITRD_SIZE;
 501                 } else {
 502                         printk("initrd extends beyond end of memory "
 503                             "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
 504                                     INITRD_START + INITRD_SIZE,
 505                                     max_low_pfn << PAGE_SHIFT);
 506                         initrd_start = 0;
 507                 }
 508         }
 509 #endif
 510
 511 #ifdef CONFIG_DUMMY_CONSOLE
 512         conswitchp = &dummy_con;
 513 #endif
 514
 515         /* Perform the machine specific initialisation */
 516         platform_setup();
 517
 518         paging_init();
 519 }
 520
 521 struct sh_machine_vector* __init get_mv_byname(const char* name)
 522 {
 523         extern int strcasecmp(const char *, const char *);
 524         extern long __machvec_start, __machvec_end;
 525         struct sh_machine_vector *all_vecs =
 526                 (struct sh_machine_vector *)&__machvec_start;
 527
 528         int i, n = ((unsigned long)&__machvec_end
 529                     - (unsigned long)&__machvec_start)/
 530                 sizeof(struct sh_machine_vector);
 531
 532         for (i = 0; i < n; ++i) {
 533                 struct sh_machine_vector *mv = &all_vecs[i];
 534                 if (mv == NULL)
 535                         continue;
 536                 if (strcasecmp(name, get_system_type()) == 0) {
 537                         return mv;
 538                 }
 539         }
 540         return NULL;
 541 }
 542
 543 static struct cpu cpu[NR_CPUS];
 544
 545 static int __init topology_init(void)
 546 {
 547         int cpu_id;
 548
 549         for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++)
 550                 if (cpu_possible(cpu_id))
 551                         register_cpu(&cpu[cpu_id], cpu_id, NULL);
 552
 553         return 0;
 554 }
 555
 556 subsys_initcall(topology_init);
 557
 558 static const char *cpu_name[] = {
 559         [CPU_SH7604]    = "SH7604",
 560         [CPU_SH7708]    = "SH7708",
 561         [CPU_SH7729]    = "SH7729",
 562         [CPU_SH7750]    = "SH7750",
 563         [CPU_SH7750S]   = "SH7750S",
 564         [CPU_SH7750R]   = "SH7750R",
 565         [CPU_SH7751]    = "SH7751",
 566         [CPU_SH7751R]   = "SH7751R",
 567         [CPU_SH7760]    = "SH7760",
 568         [CPU_ST40RA]    = "ST40RA",
 569         [CPU_ST40GX1]   = "ST40GX1",
 570         [CPU_SH4_202]   = "SH4-202",
 571         [CPU_SH4_501]   = "SH4-501",
 572         [CPU_SH_NONE]   = "Unknown"
 573 };
 574
 575 const char *get_cpu_subtype(void)
 576 {
 577         return cpu_name[boot_cpu_data.type];
 578 }
 579
 580 #ifdef CONFIG_PROC_FS
 581 static const char *cpu_flags[] = {
 582         "none", "fpu", "p2flush", "mmuassoc", "dsp",
 583 };
 584
 585 static void show_cpuflags(struct seq_file *m)
 586 {
 587         unsigned long i;
 588
 589         seq_printf(m, "cpu flags\t:");
 590
 591         if (!cpu_data->flags) {
 592                 seq_printf(m, " %s\n", cpu_flags[0]);
 593                 return;
 594         }
 595
 596         for (i = 0; i < cpu_data->flags; i++)
 597                 if ((cpu_data->flags & (1 << i)))
 598                         seq_printf(m, " %s", cpu_flags[i]);
 599
 600         seq_printf(m, "\n");
 601 }
 602
 603 static void show_cacheinfo(struct seq_file *m, const char *type, struct cache_info info)
 604 {
 605         unsigned int cache_size;
 606
 607         cache_size = info.ways * info.sets * info.linesz;
 608
 609         seq_printf(m, "%s size\t: %dKiB\n", type, cache_size >> 10);
 610 }
 611
 612 /*
 613  *      Get CPU information for use by the procfs.
 614  */
 615 static int show_cpuinfo(struct seq_file *m, void *v)
 616 {
 617         unsigned int cpu = smp_processor_id();
 618
 619         if (!cpu && cpu_online(cpu))
 620                 seq_printf(m, "machine\t\t: %s\n", get_system_type());
 621
 622         seq_printf(m, "processor\t: %d\n", cpu);
 623         seq_printf(m, "cpu family\t: %s\n", system_utsname.machine);
 624         seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype());
 625
 626         show_cpuflags(m);
 627
 628         seq_printf(m, "cache type\t: ");
 629
 630         /*
 631          * Check for what type of cache we have, we support both the
 632          * unified cache on the SH-2 and SH-3, as well as the harvard
 633          * style cache on the SH-4.
 634          */
 635         if (test_bit(SH_CACHE_COMBINED, &(boot_cpu_data.icache.flags))) {
 636                 seq_printf(m, "unified\n");
 637                 show_cacheinfo(m, "cache", boot_cpu_data.icache);
 638         } else {
 639                 seq_printf(m, "split (harvard)\n");
 640                 show_cacheinfo(m, "icache", boot_cpu_data.icache);
 641                 show_cacheinfo(m, "dcache", boot_cpu_data.dcache);
 642         }
 643
 644         seq_printf(m, "bogomips\t: %lu.%02lu\n",
 645                      boot_cpu_data.loops_per_jiffy/(500000/HZ),
 646                      (boot_cpu_data.loops_per_jiffy/(5000/HZ)) % 100);
 647
 648 #define PRINT_CLOCK(name, value) \
 649         seq_printf(m, name " clock\t: %d.%02dMHz\n", \
 650                      ((value) / 1000000), ((value) % 1000000)/10000)
 651
 652         PRINT_CLOCK("cpu", boot_cpu_data.cpu_clock);
 653         PRINT_CLOCK("bus", boot_cpu_data.bus_clock);
 654 #ifdef CONFIG_CPU_SUBTYPE_ST40STB1
 655         PRINT_CLOCK("memory", boot_cpu_data.memory_clock);
 656 #endif
 657         PRINT_CLOCK("module", boot_cpu_data.module_clock);
 658
 659         return 0;
 660 }
 661
 662
 663 static void *c_start(struct seq_file *m, loff_t *pos)
 664 {
 665         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
 666 }
 667 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 668 {
 669         ++*pos;
 670         return c_start(m, pos);
 671 }
 672 static void c_stop(struct seq_file *m, void *v)
 673 {
 674 }
 675 struct seq_operations cpuinfo_op = {
 676         .start  = c_start,
 677         .next   = c_next,
 678         .stop   = c_stop,
 679         .show   = show_cpuinfo,
 680 };
 681 #endif /* CONFIG_PROC_FS */
 682
 683 #ifdef CONFIG_SH_KGDB
 684 /*
 685  * Parse command-line kgdb options.  By default KGDB is enabled,
 686  * entered on error (or other action) using default serial info.
 687  * The command-line option can include a serial port specification
 688  * and an action to override default or configured behavior.
 689  */
 690 struct kgdb_sermap kgdb_sci_sermap =
 691 { "ttySC", 5, kgdb_sci_setup, NULL };
 692
 693 struct kgdb_sermap *kgdb_serlist = &kgdb_sci_sermap;
 694 struct kgdb_sermap *kgdb_porttype = &kgdb_sci_sermap;
 695
 696 void kgdb_register_sermap(struct kgdb_sermap *map)
 697 {
 698         struct kgdb_sermap *last;
 699
 700         for (last = kgdb_serlist; last->next; last = last->next)
 701                 ;
 702         last->next = map;
 703         if (!map->namelen) {
 704                 map->namelen = strlen(map->name);
 705         }
 706 }
 707
 708 static int __init kgdb_parse_options(char *options)
 709 {
 710         char c;
 711         int baud;
 712
 713         /* Check for port spec (or use default) */
 714
 715         /* Determine port type and instance */
 716         if (!memcmp(options, "tty", 3)) {
 717                 struct kgdb_sermap *map = kgdb_serlist;
 718
 719                 while (map && memcmp(options, map->name, map->namelen))
 720                         map = map->next;
 721
 722                 if (!map) {
 723                         KGDB_PRINTK("unknown port spec in %s\n", options);
 724                         return -1;
 725                 }
 726
 727                 kgdb_porttype = map;
 728                 kgdb_serial_setup = map->setup_fn;
 729                 kgdb_portnum = options[map->namelen] - '0';
 730                 options += map->namelen + 1;
 731
 732                 options = (*options == ',') ? options+1 : options;
 733
 734                 /* Read optional parameters (baud/parity/bits) */
 735                 baud = simple_strtoul(options, &options, 10);
 736                 if (baud != 0) {
 737                         kgdb_baud = baud;
 738
 739                         c = toupper(*options);
 740                         if (c == 'E' || c == 'O' || c == 'N') {
 741                                 kgdb_parity = c;
 742                                 options++;
 743                         }
 744
 745                         c = *options;
 746                         if (c == '7' || c == '8') {
 747                                 kgdb_bits = c;
 748                                 options++;
 749                         }
 750                         options = (*options == ',') ? options+1 : options;
 751                 }
 752         }
 753
 754         /* Check for action specification */
 755         if (!memcmp(options, "halt", 4)) {
 756                 kgdb_halt = 1;
 757                 options += 4;
 758         } else if (!memcmp(options, "disabled", 8)) {
 759                 kgdb_enabled = 0;
 760                 options += 8;
 761         }
 762
 763         if (*options) {
 764                 KGDB_PRINTK("ignored unknown options: %s\n", options);
 765                 return 0;
 766         }
 767         return 1;
 768 }
 769 __setup("kgdb=", kgdb_parse_options);
 770 #endif /* CONFIG_SH_KGDB */
 771