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/irq.h> 30 #include <asm/io.h> 31 #include <asm/machdep.h> 32 #ifdef CONFIG_AMIGA 33 #include <asm/amigahw.h> 34 #endif 35 #ifdef CONFIG_ATARI 36 #include <asm/atarihw.h> 37 #include <asm/atari_stram.h> 38 #endif 39 #ifdef CONFIG_SUN3X 40 #include <asm/dvma.h> 41 #endif 42 43 unsigned long m68k_machtype; 44 unsigned long m68k_cputype; 45 EXPORT_SYMBOL(m68k_machtype); 46 EXPORT_SYMBOL(m68k_cputype); 47 unsigned long m68k_fputype; 48 unsigned long m68k_mmutype; 49 #ifdef CONFIG_VME 50 unsigned long vme_brdtype; 51 EXPORT_SYMBOL(vme_brdtype); 52 #endif 53 54 int m68k_is040or060; 55 EXPORT_SYMBOL(m68k_is040or060); 56 57 extern int end; 58 extern unsigned long availmem; 59 60 int m68k_num_memory; 61 int m68k_realnum_memory; 62 EXPORT_SYMBOL(m68k_realnum_memory); 63 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 64 unsigned long m68k_memoffset; 65 EXPORT_SYMBOL(m68k_memoffset); 66 #endif 67 struct mem_info m68k_memory[NUM_MEMINFO]; 68 EXPORT_SYMBOL(m68k_memory); 69 70 static struct mem_info m68k_ramdisk; 71 72 static char m68k_command_line[CL_SIZE]; 73 74 char m68k_debug_device[6] = ""; 75 EXPORT_SYMBOL(m68k_debug_device); 76 77 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL; 78 /* machine dependent irq functions */ 79 void (*mach_init_IRQ) (void) __initdata = NULL; 80 void (*mach_get_model) (char *model); 81 int (*mach_get_hardware_list) (char *buffer); 82 /* machine dependent timer functions */ 83 unsigned long (*mach_gettimeoffset) (void); 84 int (*mach_hwclk) (int, struct rtc_time*); 85 EXPORT_SYMBOL(mach_hwclk); 86 int (*mach_set_clock_mmss) (unsigned long); 87 unsigned int (*mach_get_ss)(void); 88 int (*mach_get_rtc_pll)(struct rtc_pll_info *); 89 int (*mach_set_rtc_pll)(struct rtc_pll_info *); 90 EXPORT_SYMBOL(mach_get_ss); 91 EXPORT_SYMBOL(mach_get_rtc_pll); 92 EXPORT_SYMBOL(mach_set_rtc_pll); 93 void (*mach_reset)( void ); 94 void (*mach_halt)( void ); 95 void (*mach_power_off)( void ); 96 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 97 #ifdef CONFIG_HEARTBEAT 98 void (*mach_heartbeat) (int); 99 EXPORT_SYMBOL(mach_heartbeat); 100 #endif 101 #ifdef CONFIG_M68K_L2_CACHE 102 void (*mach_l2_flush) (int); 103 #endif 104 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) 105 void (*mach_beep)(unsigned int, unsigned int); 106 EXPORT_SYMBOL(mach_beep); 107 #endif 108 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 109 int isa_type; 110 int isa_sex; 111 EXPORT_SYMBOL(isa_type); 112 EXPORT_SYMBOL(isa_sex); 113 #endif 114 115 extern int amiga_parse_bootinfo(const struct bi_record *); 116 extern int atari_parse_bootinfo(const struct bi_record *); 117 extern int mac_parse_bootinfo(const struct bi_record *); 118 extern int q40_parse_bootinfo(const struct bi_record *); 119 extern int bvme6000_parse_bootinfo(const struct bi_record *); 120 extern int mvme16x_parse_bootinfo(const struct bi_record *); 121 extern int mvme147_parse_bootinfo(const struct bi_record *); 122 extern int hp300_parse_bootinfo(const struct bi_record *); 123 124 extern void config_amiga(void); 125 extern void config_atari(void); 126 extern void config_mac(void); 127 extern void config_sun3(void); 128 extern void config_apollo(void); 129 extern void config_mvme147(void); 130 extern void config_mvme16x(void); 131 extern void config_bvme6000(void); 132 extern void config_hp300(void); 133 extern void config_q40(void); 134 extern void config_sun3x(void); 135 136 extern void mac_debugging_short (int, short); 137 extern void mac_debugging_long (int, long); 138 139 #define MASK_256K 0xfffc0000 140 141 extern void paging_init(void); 142 143 static 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 switch (record->tag) { 149 case BI_MACHTYPE: 150 case BI_CPUTYPE: 151 case BI_FPUTYPE: 152 case BI_MMUTYPE: 153 /* Already set up by head.S */ 154 break; 155 156 case BI_MEMCHUNK: 157 if (m68k_num_memory < NUM_MEMINFO) { 158 m68k_memory[m68k_num_memory].addr = data[0]; 159 m68k_memory[m68k_num_memory].size = data[1]; 160 m68k_num_memory++; 161 } else 162 printk("m68k_parse_bootinfo: too many memory chunks\n"); 163 break; 164 165 case BI_RAMDISK: 166 m68k_ramdisk.addr = data[0]; 167 m68k_ramdisk.size = data[1]; 168 break; 169 170 case BI_COMMAND_LINE: 171 strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line)); 172 break; 173 174 default: 175 if (MACH_IS_AMIGA) 176 unknown = amiga_parse_bootinfo(record); 177 else if (MACH_IS_ATARI) 178 unknown = atari_parse_bootinfo(record); 179 else if (MACH_IS_MAC) 180 unknown = mac_parse_bootinfo(record); 181 else if (MACH_IS_Q40) 182 unknown = q40_parse_bootinfo(record); 183 else if (MACH_IS_BVME6000) 184 unknown = bvme6000_parse_bootinfo(record); 185 else if (MACH_IS_MVME16x) 186 unknown = mvme16x_parse_bootinfo(record); 187 else if (MACH_IS_MVME147) 188 unknown = mvme147_parse_bootinfo(record); 189 else if (MACH_IS_HP300) 190 unknown = hp300_parse_bootinfo(record); 191 else 192 unknown = 1; 193 } 194 if (unknown) 195 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", 196 record->tag); 197 record = (struct bi_record *)((unsigned long)record+record->size); 198 } 199 200 m68k_realnum_memory = m68k_num_memory; 201 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 202 if (m68k_num_memory > 1) { 203 printk("Ignoring last %i chunks of physical memory\n", 204 (m68k_num_memory - 1)); 205 m68k_num_memory = 1; 206 } 207 m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET; 208 #endif 209 } 210 211 void __init setup_arch(char **cmdline_p) 212 { 213 extern int _etext, _edata, _end; 214 #ifndef CONFIG_SUN3 215 unsigned long endmem, startmem; 216 #endif 217 int i; 218 char *p, *q; 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 the command line for arch-specific options. 262 * For the m68k, this is currently only "debug=xxx" to enable printing 263 * certain kernel messages to some machine-specific device. 264 */ 265 for( p = *cmdline_p; p && *p; ) { 266 i = 0; 267 if (!strncmp( p, "debug=", 6 )) { 268 strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) ); 269 if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0; 270 i = 1; 271 } 272 #ifdef CONFIG_ATARI 273 /* This option must be parsed very early */ 274 if (!strncmp( p, "switches=", 9 )) { 275 extern void atari_switches_setup( const char *, int ); 276 atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ? 277 (q - (p+9)) : strlen(p+9) ); 278 i = 1; 279 } 280 #endif 281 282 if (i) { 283 /* option processed, delete it */ 284 if ((q = strchr( p, ' ' ))) 285 strcpy( p, q+1 ); 286 else 287 *p = 0; 288 } else { 289 if ((p = strchr( p, ' ' ))) ++p; 290 } 291 } 292 293 #ifdef CONFIG_DUMMY_CONSOLE 294 conswitchp = &dummy_con; 295 #endif 296 297 switch (m68k_machtype) { 298 #ifdef CONFIG_AMIGA 299 case MACH_AMIGA: 300 config_amiga(); 301 break; 302 #endif 303 #ifdef CONFIG_ATARI 304 case MACH_ATARI: 305 config_atari(); 306 break; 307 #endif 308 #ifdef CONFIG_MAC 309 case MACH_MAC: 310 config_mac(); 311 break; 312 #endif 313 #ifdef CONFIG_SUN3 314 case MACH_SUN3: 315 config_sun3(); 316 break; 317 #endif 318 #ifdef CONFIG_APOLLO 319 case MACH_APOLLO: 320 config_apollo(); 321 break; 322 #endif 323 #ifdef CONFIG_MVME147 324 case MACH_MVME147: 325 config_mvme147(); 326 break; 327 #endif 328 #ifdef CONFIG_MVME16x 329 case MACH_MVME16x: 330 config_mvme16x(); 331 break; 332 #endif 333 #ifdef CONFIG_BVME6000 334 case MACH_BVME6000: 335 config_bvme6000(); 336 break; 337 #endif 338 #ifdef CONFIG_HP300 339 case MACH_HP300: 340 config_hp300(); 341 break; 342 #endif 343 #ifdef CONFIG_Q40 344 case MACH_Q40: 345 config_q40(); 346 break; 347 #endif 348 #ifdef CONFIG_SUN3X 349 case MACH_SUN3X: 350 config_sun3x(); 351 break; 352 #endif 353 default: 354 panic ("No configuration setup"); 355 } 356 357 #ifndef CONFIG_SUN3 358 startmem= m68k_memory[0].addr; 359 endmem = startmem + m68k_memory[0].size; 360 high_memory = (void *)PAGE_OFFSET; 361 for (i = 0; i < m68k_num_memory; i++) { 362 m68k_memory[i].size &= MASK_256K; 363 if (m68k_memory[i].addr < startmem) 364 startmem = m68k_memory[i].addr; 365 if (m68k_memory[i].addr+m68k_memory[i].size > endmem) 366 endmem = m68k_memory[i].addr+m68k_memory[i].size; 367 high_memory += m68k_memory[i].size; 368 } 369 370 availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT, 371 startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT); 372 373 for (i = 0; i < m68k_num_memory; i++) 374 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size); 375 376 reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr); 377 378 #ifdef CONFIG_BLK_DEV_INITRD 379 if (m68k_ramdisk.size) { 380 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size); 381 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 382 initrd_end = initrd_start + m68k_ramdisk.size; 383 printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 384 } 385 #endif 386 387 #ifdef CONFIG_ATARI 388 if (MACH_IS_ATARI) 389 atari_stram_reserve_pages((void *)availmem); 390 #endif 391 #ifdef CONFIG_SUN3X 392 if (MACH_IS_SUN3X) { 393 dvma_init(); 394 } 395 #endif 396 397 #endif /* !CONFIG_SUN3 */ 398 399 paging_init(); 400 401 /* set ISA defs early as possible */ 402 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 403 #if defined(CONFIG_Q40) 404 if (MACH_IS_Q40) { 405 isa_type = Q40_ISA; 406 isa_sex = 0; 407 } 408 #elif defined(CONFIG_GG2) 409 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){ 410 isa_type = GG2_ISA; 411 isa_sex = 0; 412 } 413 #elif defined(CONFIG_AMIGA_PCMCIA) 414 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){ 415 isa_type = AG_ISA; 416 isa_sex = 1; 417 } 418 #endif 419 #endif 420 } 421 422 static int show_cpuinfo(struct seq_file *m, void *v) 423 { 424 const char *cpu, *mmu, *fpu; 425 unsigned long clockfreq, clockfactor; 426 427 #define LOOP_CYCLES_68020 (8) 428 #define LOOP_CYCLES_68030 (8) 429 #define LOOP_CYCLES_68040 (3) 430 #define LOOP_CYCLES_68060 (1) 431 432 if (CPU_IS_020) { 433 cpu = "68020"; 434 clockfactor = LOOP_CYCLES_68020; 435 } else if (CPU_IS_030) { 436 cpu = "68030"; 437 clockfactor = LOOP_CYCLES_68030; 438 } else if (CPU_IS_040) { 439 cpu = "68040"; 440 clockfactor = LOOP_CYCLES_68040; 441 } else if (CPU_IS_060) { 442 cpu = "68060"; 443 clockfactor = LOOP_CYCLES_68060; 444 } else { 445 cpu = "680x0"; 446 clockfactor = 0; 447 } 448 449 #ifdef CONFIG_M68KFPU_EMU_ONLY 450 fpu="none(soft float)"; 451 #else 452 if (m68k_fputype & FPU_68881) 453 fpu = "68881"; 454 else if (m68k_fputype & FPU_68882) 455 fpu = "68882"; 456 else if (m68k_fputype & FPU_68040) 457 fpu = "68040"; 458 else if (m68k_fputype & FPU_68060) 459 fpu = "68060"; 460 else if (m68k_fputype & FPU_SUNFPA) 461 fpu = "Sun FPA"; 462 else 463 fpu = "none"; 464 #endif 465 466 if (m68k_mmutype & MMU_68851) 467 mmu = "68851"; 468 else if (m68k_mmutype & MMU_68030) 469 mmu = "68030"; 470 else if (m68k_mmutype & MMU_68040) 471 mmu = "68040"; 472 else if (m68k_mmutype & MMU_68060) 473 mmu = "68060"; 474 else if (m68k_mmutype & MMU_SUN3) 475 mmu = "Sun-3"; 476 else if (m68k_mmutype & MMU_APOLLO) 477 mmu = "Apollo"; 478 else 479 mmu = "unknown"; 480 481 clockfreq = loops_per_jiffy*HZ*clockfactor; 482 483 seq_printf(m, "CPU:\t\t%s\n" 484 "MMU:\t\t%s\n" 485 "FPU:\t\t%s\n" 486 "Clocking:\t%lu.%1luMHz\n" 487 "BogoMips:\t%lu.%02lu\n" 488 "Calibration:\t%lu loops\n", 489 cpu, mmu, fpu, 490 clockfreq/1000000,(clockfreq/100000)%10, 491 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 492 loops_per_jiffy); 493 return 0; 494 } 495 496 static void *c_start(struct seq_file *m, loff_t *pos) 497 { 498 return *pos < 1 ? (void *)1 : NULL; 499 } 500 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 501 { 502 ++*pos; 503 return NULL; 504 } 505 static void c_stop(struct seq_file *m, void *v) 506 { 507 } 508 struct seq_operations cpuinfo_op = { 509 .start = c_start, 510 .next = c_next, 511 .stop = c_stop, 512 .show = show_cpuinfo, 513 }; 514 515 int get_hardware_list(char *buffer) 516 { 517 int len = 0; 518 char model[80]; 519 unsigned long mem; 520 int i; 521 522 if (mach_get_model) 523 mach_get_model(model); 524 else 525 strcpy(model, "Unknown m68k"); 526 527 len += sprintf(buffer+len, "Model:\t\t%s\n", model); 528 for (mem = 0, i = 0; i < m68k_num_memory; i++) 529 mem += m68k_memory[i].size; 530 len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10); 531 532 if (mach_get_hardware_list) 533 len += mach_get_hardware_list(buffer+len); 534 535 return(len); 536 } 537 538 void check_bugs(void) 539 { 540 #ifndef CONFIG_M68KFPU_EMU 541 if (m68k_fputype == 0) { 542 printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 543 "WHICH IS REQUIRED BY LINUX/M68K ***\n" ); 544 printk( KERN_EMERG "Upgrade your hardware or join the FPU " 545 "emulation project\n" ); 546 panic( "no FPU" ); 547 } 548 #endif /* !CONFIG_M68KFPU_EMU */ 549 } 550