linux/arch/m68k/kernel/setup.c
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   1/*
   2 *  linux/arch/m68k/kernel/setup.c
   3 *
   4 *  Copyright (C) 1995  Hamish Macdonald
   5 */
   6
   7/*
   8 * This file handles the architecture-dependent parts of system setup
   9 */
  10
  11#include <linux/kernel.h>
  12#include <linux/mm.h>
  13#include <linux/sched.h>
  14#include <linux/delay.h>
  15#include <linux/interrupt.h>
  16#include <linux/fs.h>
  17#include <linux/console.h>
  18#include <linux/genhd.h>
  19#include <linux/errno.h>
  20#include <linux/string.h>
  21#include <linux/init.h>
  22#include <linux/bootmem.h>
  23#include <linux/seq_file.h>
  24#include <linux/module.h>
  25#include <linux/initrd.h>
  26
  27#include <asm/bootinfo.h>
  28#include <asm/setup.h>
  29#include <asm/fpu.h>
  30#include <asm/irq.h>
  31#include <asm/io.h>
  32#include <asm/machdep.h>
  33#ifdef CONFIG_AMIGA
  34#include <asm/amigahw.h>
  35#endif
  36#ifdef CONFIG_ATARI
  37#include <asm/atarihw.h>
  38#include <asm/atari_stram.h>
  39#endif
  40#ifdef CONFIG_SUN3X
  41#include <asm/dvma.h>
  42#endif
  43
  44#if !FPSTATESIZE || !NR_IRQS
  45#warning No CPU/platform type selected, your kernel will not work!
  46#warning Are you building an allnoconfig kernel?
  47#endif
  48
  49unsigned long m68k_machtype;
  50EXPORT_SYMBOL(m68k_machtype);
  51unsigned long m68k_cputype;
  52EXPORT_SYMBOL(m68k_cputype);
  53unsigned long m68k_fputype;
  54unsigned long m68k_mmutype;
  55EXPORT_SYMBOL(m68k_mmutype);
  56#ifdef CONFIG_VME
  57unsigned long vme_brdtype;
  58EXPORT_SYMBOL(vme_brdtype);
  59#endif
  60
  61int m68k_is040or060;
  62EXPORT_SYMBOL(m68k_is040or060);
  63
  64extern int end;
  65extern unsigned long availmem;
  66
  67int m68k_num_memory;
  68EXPORT_SYMBOL(m68k_num_memory);
  69int m68k_realnum_memory;
  70EXPORT_SYMBOL(m68k_realnum_memory);
  71unsigned long m68k_memoffset;
  72struct mem_info m68k_memory[NUM_MEMINFO];
  73EXPORT_SYMBOL(m68k_memory);
  74
  75struct mem_info m68k_ramdisk;
  76
  77static char m68k_command_line[CL_SIZE];
  78
  79void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
  80/* machine dependent irq functions */
  81void (*mach_init_IRQ) (void) __initdata = NULL;
  82void (*mach_get_model) (char *model);
  83int (*mach_get_hardware_list) (char *buffer);
  84/* machine dependent timer functions */
  85unsigned long (*mach_gettimeoffset) (void);
  86int (*mach_hwclk) (int, struct rtc_time*);
  87EXPORT_SYMBOL(mach_hwclk);
  88int (*mach_set_clock_mmss) (unsigned long);
  89unsigned int (*mach_get_ss)(void);
  90int (*mach_get_rtc_pll)(struct rtc_pll_info *);
  91int (*mach_set_rtc_pll)(struct rtc_pll_info *);
  92EXPORT_SYMBOL(mach_get_ss);
  93EXPORT_SYMBOL(mach_get_rtc_pll);
  94EXPORT_SYMBOL(mach_set_rtc_pll);
  95void (*mach_reset)( void );
  96void (*mach_halt)( void );
  97void (*mach_power_off)( void );
  98long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
  99#ifdef CONFIG_HEARTBEAT
 100void (*mach_heartbeat) (int);
 101EXPORT_SYMBOL(mach_heartbeat);
 102#endif
 103#ifdef CONFIG_M68K_L2_CACHE
 104void (*mach_l2_flush) (int);
 105#endif
 106#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
 107void (*mach_beep)(unsigned int, unsigned int);
 108EXPORT_SYMBOL(mach_beep);
 109#endif
 110#if defined(CONFIG_ISA) && defined(MULTI_ISA)
 111int isa_type;
 112int isa_sex;
 113EXPORT_SYMBOL(isa_type);
 114EXPORT_SYMBOL(isa_sex);
 115#endif
 116
 117extern int amiga_parse_bootinfo(const struct bi_record *);
 118extern int atari_parse_bootinfo(const struct bi_record *);
 119extern int mac_parse_bootinfo(const struct bi_record *);
 120extern int q40_parse_bootinfo(const struct bi_record *);
 121extern int bvme6000_parse_bootinfo(const struct bi_record *);
 122extern int mvme16x_parse_bootinfo(const struct bi_record *);
 123extern int mvme147_parse_bootinfo(const struct bi_record *);
 124extern int hp300_parse_bootinfo(const struct bi_record *);
 125extern int apollo_parse_bootinfo(const struct bi_record *);
 126
 127extern void config_amiga(void);
 128extern void config_atari(void);
 129extern void config_mac(void);
 130extern void config_sun3(void);
 131extern void config_apollo(void);
 132extern void config_mvme147(void);
 133extern void config_mvme16x(void);
 134extern void config_bvme6000(void);
 135extern void config_hp300(void);
 136extern void config_q40(void);
 137extern void config_sun3x(void);
 138
 139#define MASK_256K 0xfffc0000
 140
 141extern void paging_init(void);
 142
 143static void __init m68k_parse_bootinfo(const struct bi_record *record)
 144{
 145        while (record->tag != BI_LAST) {
 146                int unknown = 0;
 147                const unsigned long *data = record->data;
 148
 149                switch (record->tag) {
 150                case BI_MACHTYPE:
 151                case BI_CPUTYPE:
 152                case BI_FPUTYPE:
 153                case BI_MMUTYPE:
 154                        /* Already set up by head.S */
 155                        break;
 156
 157                case BI_MEMCHUNK:
 158                        if (m68k_num_memory < NUM_MEMINFO) {
 159                                m68k_memory[m68k_num_memory].addr = data[0];
 160                                m68k_memory[m68k_num_memory].size = data[1];
 161                                m68k_num_memory++;
 162                        } else
 163                                printk("m68k_parse_bootinfo: too many memory chunks\n");
 164                        break;
 165
 166                case BI_RAMDISK:
 167                        m68k_ramdisk.addr = data[0];
 168                        m68k_ramdisk.size = data[1];
 169                        break;
 170
 171                case BI_COMMAND_LINE:
 172                        strlcpy(m68k_command_line, (const char *)data,
 173                                sizeof(m68k_command_line));
 174                        break;
 175
 176                default:
 177                        if (MACH_IS_AMIGA)
 178                                unknown = amiga_parse_bootinfo(record);
 179                        else if (MACH_IS_ATARI)
 180                                unknown = atari_parse_bootinfo(record);
 181                        else if (MACH_IS_MAC)
 182                                unknown = mac_parse_bootinfo(record);
 183                        else if (MACH_IS_Q40)
 184                                unknown = q40_parse_bootinfo(record);
 185                        else if (MACH_IS_BVME6000)
 186                                unknown = bvme6000_parse_bootinfo(record);
 187                        else if (MACH_IS_MVME16x)
 188                                unknown = mvme16x_parse_bootinfo(record);
 189                        else if (MACH_IS_MVME147)
 190                                unknown = mvme147_parse_bootinfo(record);
 191                        else if (MACH_IS_HP300)
 192                                unknown = hp300_parse_bootinfo(record);
 193                        else if (MACH_IS_APOLLO)
 194                                unknown = apollo_parse_bootinfo(record);
 195                        else
 196                                unknown = 1;
 197                }
 198                if (unknown)
 199                        printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
 200                               record->tag);
 201                record = (struct bi_record *)((unsigned long)record +
 202                                              record->size);
 203        }
 204
 205        m68k_realnum_memory = m68k_num_memory;
 206#ifdef CONFIG_SINGLE_MEMORY_CHUNK
 207        if (m68k_num_memory > 1) {
 208                printk("Ignoring last %i chunks of physical memory\n",
 209                       (m68k_num_memory - 1));
 210                m68k_num_memory = 1;
 211        }
 212#endif
 213}
 214
 215void __init setup_arch(char **cmdline_p)
 216{
 217        extern int _etext, _edata, _end;
 218        int i;
 219
 220        /* The bootinfo is located right after the kernel bss */
 221        m68k_parse_bootinfo((const struct bi_record *)&_end);
 222
 223        if (CPU_IS_040)
 224                m68k_is040or060 = 4;
 225        else if (CPU_IS_060)
 226                m68k_is040or060 = 6;
 227
 228        /* FIXME: m68k_fputype is passed in by Penguin booter, which can
 229         * be confused by software FPU emulation. BEWARE.
 230         * We should really do our own FPU check at startup.
 231         * [what do we do with buggy 68LC040s? if we have problems
 232         *  with them, we should add a test to check_bugs() below] */
 233#ifndef CONFIG_M68KFPU_EMU_ONLY
 234        /* clear the fpu if we have one */
 235        if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
 236                volatile int zero = 0;
 237                asm volatile ("frestore %0" : : "m" (zero));
 238        }
 239#endif
 240
 241        if (CPU_IS_060) {
 242                u32 pcr;
 243
 244                asm (".chip 68060; movec %%pcr,%0; .chip 68k"
 245                     : "=d" (pcr));
 246                if (((pcr >> 8) & 0xff) <= 5) {
 247                        printk("Enabling workaround for errata I14\n");
 248                        asm (".chip 68060; movec %0,%%pcr; .chip 68k"
 249                             : : "d" (pcr | 0x20));
 250                }
 251        }
 252
 253        init_mm.start_code = PAGE_OFFSET;
 254        init_mm.end_code = (unsigned long) &_etext;
 255        init_mm.end_data = (unsigned long) &_edata;
 256        init_mm.brk = (unsigned long) &_end;
 257
 258        *cmdline_p = m68k_command_line;
 259        memcpy(boot_command_line, *cmdline_p, CL_SIZE);
 260
 261        parse_early_param();
 262
 263#ifdef CONFIG_DUMMY_CONSOLE
 264        conswitchp = &dummy_con;
 265#endif
 266
 267        switch (m68k_machtype) {
 268#ifdef CONFIG_AMIGA
 269        case MACH_AMIGA:
 270                config_amiga();
 271                break;
 272#endif
 273#ifdef CONFIG_ATARI
 274        case MACH_ATARI:
 275                config_atari();
 276                break;
 277#endif
 278#ifdef CONFIG_MAC
 279        case MACH_MAC:
 280                config_mac();
 281                break;
 282#endif
 283#ifdef CONFIG_SUN3
 284        case MACH_SUN3:
 285                config_sun3();
 286                break;
 287#endif
 288#ifdef CONFIG_APOLLO
 289        case MACH_APOLLO:
 290                config_apollo();
 291                break;
 292#endif
 293#ifdef CONFIG_MVME147
 294        case MACH_MVME147:
 295                config_mvme147();
 296                break;
 297#endif
 298#ifdef CONFIG_MVME16x
 299        case MACH_MVME16x:
 300                config_mvme16x();
 301                break;
 302#endif
 303#ifdef CONFIG_BVME6000
 304        case MACH_BVME6000:
 305                config_bvme6000();
 306                break;
 307#endif
 308#ifdef CONFIG_HP300
 309        case MACH_HP300:
 310                config_hp300();
 311                break;
 312#endif
 313#ifdef CONFIG_Q40
 314        case MACH_Q40:
 315                config_q40();
 316                break;
 317#endif
 318#ifdef CONFIG_SUN3X
 319        case MACH_SUN3X:
 320                config_sun3x();
 321                break;
 322#endif
 323        default:
 324                panic("No configuration setup");
 325        }
 326
 327        paging_init();
 328
 329#ifndef CONFIG_SUN3
 330        for (i = 1; i < m68k_num_memory; i++)
 331                free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
 332                                  m68k_memory[i].size);
 333#ifdef CONFIG_BLK_DEV_INITRD
 334        if (m68k_ramdisk.size) {
 335                reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
 336                                     m68k_ramdisk.addr, m68k_ramdisk.size,
 337                                     BOOTMEM_DEFAULT);
 338                initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
 339                initrd_end = initrd_start + m68k_ramdisk.size;
 340                printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
 341        }
 342#endif
 343
 344#ifdef CONFIG_ATARI
 345        if (MACH_IS_ATARI)
 346                atari_stram_reserve_pages((void *)availmem);
 347#endif
 348#ifdef CONFIG_SUN3X
 349        if (MACH_IS_SUN3X) {
 350                dvma_init();
 351        }
 352#endif
 353
 354#endif /* !CONFIG_SUN3 */
 355
 356/* set ISA defs early as possible */
 357#if defined(CONFIG_ISA) && defined(MULTI_ISA)
 358        if (MACH_IS_Q40) {
 359                isa_type = ISA_TYPE_Q40;
 360                isa_sex = 0;
 361        }
 362#ifdef CONFIG_GG2
 363        if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
 364                isa_type = ISA_TYPE_GG2;
 365                isa_sex = 0;
 366        }
 367#endif
 368#ifdef CONFIG_AMIGA_PCMCIA
 369        if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
 370                isa_type = ISA_TYPE_AG;
 371                isa_sex = 1;
 372        }
 373#endif
 374#endif
 375}
 376
 377static int show_cpuinfo(struct seq_file *m, void *v)
 378{
 379        const char *cpu, *mmu, *fpu;
 380        unsigned long clockfreq, clockfactor;
 381
 382#define LOOP_CYCLES_68020       (8)
 383#define LOOP_CYCLES_68030       (8)
 384#define LOOP_CYCLES_68040       (3)
 385#define LOOP_CYCLES_68060       (1)
 386
 387        if (CPU_IS_020) {
 388                cpu = "68020";
 389                clockfactor = LOOP_CYCLES_68020;
 390        } else if (CPU_IS_030) {
 391                cpu = "68030";
 392                clockfactor = LOOP_CYCLES_68030;
 393        } else if (CPU_IS_040) {
 394                cpu = "68040";
 395                clockfactor = LOOP_CYCLES_68040;
 396        } else if (CPU_IS_060) {
 397                cpu = "68060";
 398                clockfactor = LOOP_CYCLES_68060;
 399        } else {
 400                cpu = "680x0";
 401                clockfactor = 0;
 402        }
 403
 404#ifdef CONFIG_M68KFPU_EMU_ONLY
 405        fpu = "none(soft float)";
 406#else
 407        if (m68k_fputype & FPU_68881)
 408                fpu = "68881";
 409        else if (m68k_fputype & FPU_68882)
 410                fpu = "68882";
 411        else if (m68k_fputype & FPU_68040)
 412                fpu = "68040";
 413        else if (m68k_fputype & FPU_68060)
 414                fpu = "68060";
 415        else if (m68k_fputype & FPU_SUNFPA)
 416                fpu = "Sun FPA";
 417        else
 418                fpu = "none";
 419#endif
 420
 421        if (m68k_mmutype & MMU_68851)
 422                mmu = "68851";
 423        else if (m68k_mmutype & MMU_68030)
 424                mmu = "68030";
 425        else if (m68k_mmutype & MMU_68040)
 426                mmu = "68040";
 427        else if (m68k_mmutype & MMU_68060)
 428                mmu = "68060";
 429        else if (m68k_mmutype & MMU_SUN3)
 430                mmu = "Sun-3";
 431        else if (m68k_mmutype & MMU_APOLLO)
 432                mmu = "Apollo";
 433        else
 434                mmu = "unknown";
 435
 436        clockfreq = loops_per_jiffy * HZ * clockfactor;
 437
 438        seq_printf(m, "CPU:\t\t%s\n"
 439                   "MMU:\t\t%s\n"
 440                   "FPU:\t\t%s\n"
 441                   "Clocking:\t%lu.%1luMHz\n"
 442                   "BogoMips:\t%lu.%02lu\n"
 443                   "Calibration:\t%lu loops\n",
 444                   cpu, mmu, fpu,
 445                   clockfreq/1000000,(clockfreq/100000)%10,
 446                   loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
 447                   loops_per_jiffy);
 448        return 0;
 449}
 450
 451static void *c_start(struct seq_file *m, loff_t *pos)
 452{
 453        return *pos < 1 ? (void *)1 : NULL;
 454}
 455static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 456{
 457        ++*pos;
 458        return NULL;
 459}
 460static void c_stop(struct seq_file *m, void *v)
 461{
 462}
 463const struct seq_operations cpuinfo_op = {
 464        .start  = c_start,
 465        .next   = c_next,
 466        .stop   = c_stop,
 467        .show   = show_cpuinfo,
 468};
 469
 470int get_hardware_list(char *buffer)
 471{
 472        int len = 0;
 473        char model[80];
 474        unsigned long mem;
 475        int i;
 476
 477        if (mach_get_model)
 478                mach_get_model(model);
 479        else
 480                strcpy(model, "Unknown m68k");
 481
 482        len += sprintf(buffer + len, "Model:\t\t%s\n", model);
 483        for (mem = 0, i = 0; i < m68k_num_memory; i++)
 484                mem += m68k_memory[i].size;
 485        len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10);
 486
 487        if (mach_get_hardware_list)
 488                len += mach_get_hardware_list(buffer + len);
 489
 490        return len;
 491}
 492
 493void check_bugs(void)
 494{
 495#ifndef CONFIG_M68KFPU_EMU
 496        if (m68k_fputype == 0) {
 497                printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
 498                        "WHICH IS REQUIRED BY LINUX/M68K ***\n");
 499                printk(KERN_EMERG "Upgrade your hardware or join the FPU "
 500                        "emulation project\n");
 501                panic("no FPU");
 502        }
 503#endif /* !CONFIG_M68KFPU_EMU */
 504}
 505
 506#ifdef CONFIG_ADB
 507static int __init adb_probe_sync_enable (char *str) {
 508        extern int __adb_probe_sync;
 509        __adb_probe_sync = 1;
 510        return 1;
 511}
 512
 513__setup("adb_sync", adb_probe_sync_enable);
 514#endif /* CONFIG_ADB */
 515