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/proc_fs.h> 24 #include <linux/seq_file.h> 25 #include <linux/module.h> 26 #include <linux/initrd.h> 27 28 #include <asm/bootinfo.h> 29 #include <asm/sections.h> 30 #include <asm/setup.h> 31 #include <asm/fpu.h> 32 #include <asm/irq.h> 33 #include <asm/io.h> 34 #include <asm/machdep.h> 35 #ifdef CONFIG_AMIGA 36 #include <asm/amigahw.h> 37 #endif 38 #ifdef CONFIG_ATARI 39 #include <asm/atarihw.h> 40 #include <asm/atari_stram.h> 41 #endif 42 #ifdef CONFIG_SUN3X 43 #include <asm/dvma.h> 44 #endif 45 #include <asm/natfeat.h> 46 47 #if !FPSTATESIZE || !NR_IRQS 48 #warning No CPU/platform type selected, your kernel will not work! 49 #warning Are you building an allnoconfig kernel? 50 #endif 51 52 unsigned long m68k_machtype; 53 EXPORT_SYMBOL(m68k_machtype); 54 unsigned long m68k_cputype; 55 EXPORT_SYMBOL(m68k_cputype); 56 unsigned long m68k_fputype; 57 unsigned long m68k_mmutype; 58 EXPORT_SYMBOL(m68k_mmutype); 59 #ifdef CONFIG_VME 60 unsigned long vme_brdtype; 61 EXPORT_SYMBOL(vme_brdtype); 62 #endif 63 64 int m68k_is040or060; 65 EXPORT_SYMBOL(m68k_is040or060); 66 67 extern unsigned long availmem; 68 69 int m68k_num_memory; 70 EXPORT_SYMBOL(m68k_num_memory); 71 int m68k_realnum_memory; 72 EXPORT_SYMBOL(m68k_realnum_memory); 73 unsigned long m68k_memoffset; 74 struct mem_info m68k_memory[NUM_MEMINFO]; 75 EXPORT_SYMBOL(m68k_memory); 76 77 struct mem_info m68k_ramdisk; 78 79 static char m68k_command_line[CL_SIZE]; 80 81 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL; 82 /* machine dependent irq functions */ 83 void (*mach_init_IRQ) (void) __initdata = NULL; 84 void (*mach_get_model) (char *model); 85 void (*mach_get_hardware_list) (struct seq_file *m); 86 /* machine dependent timer functions */ 87 int (*mach_hwclk) (int, struct rtc_time*); 88 EXPORT_SYMBOL(mach_hwclk); 89 int (*mach_set_clock_mmss) (unsigned long); 90 unsigned int (*mach_get_ss)(void); 91 int (*mach_get_rtc_pll)(struct rtc_pll_info *); 92 int (*mach_set_rtc_pll)(struct rtc_pll_info *); 93 EXPORT_SYMBOL(mach_get_ss); 94 EXPORT_SYMBOL(mach_get_rtc_pll); 95 EXPORT_SYMBOL(mach_set_rtc_pll); 96 void (*mach_reset)( void ); 97 void (*mach_halt)( void ); 98 void (*mach_power_off)( void ); 99 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 100 #ifdef CONFIG_HEARTBEAT 101 void (*mach_heartbeat) (int); 102 EXPORT_SYMBOL(mach_heartbeat); 103 #endif 104 #ifdef CONFIG_M68K_L2_CACHE 105 void (*mach_l2_flush) (int); 106 #endif 107 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) 108 void (*mach_beep)(unsigned int, unsigned int); 109 EXPORT_SYMBOL(mach_beep); 110 #endif 111 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 112 int isa_type; 113 int isa_sex; 114 EXPORT_SYMBOL(isa_type); 115 EXPORT_SYMBOL(isa_sex); 116 #endif 117 118 extern int amiga_parse_bootinfo(const struct bi_record *); 119 extern int atari_parse_bootinfo(const struct bi_record *); 120 extern int mac_parse_bootinfo(const struct bi_record *); 121 extern int q40_parse_bootinfo(const struct bi_record *); 122 extern int bvme6000_parse_bootinfo(const struct bi_record *); 123 extern int mvme16x_parse_bootinfo(const struct bi_record *); 124 extern int mvme147_parse_bootinfo(const struct bi_record *); 125 extern int hp300_parse_bootinfo(const struct bi_record *); 126 extern int apollo_parse_bootinfo(const struct bi_record *); 127 128 extern void config_amiga(void); 129 extern void config_atari(void); 130 extern void config_mac(void); 131 extern void config_sun3(void); 132 extern void config_apollo(void); 133 extern void config_mvme147(void); 134 extern void config_mvme16x(void); 135 extern void config_bvme6000(void); 136 extern void config_hp300(void); 137 extern void config_q40(void); 138 extern void config_sun3x(void); 139 140 #define MASK_256K 0xfffc0000 141 142 extern void paging_init(void); 143 144 static void __init m68k_parse_bootinfo(const struct bi_record *record) 145 { 146 while (record->tag != BI_LAST) { 147 int unknown = 0; 148 const unsigned long *data = record->data; 149 150 switch (record->tag) { 151 case BI_MACHTYPE: 152 case BI_CPUTYPE: 153 case BI_FPUTYPE: 154 case BI_MMUTYPE: 155 /* Already set up by head.S */ 156 break; 157 158 case BI_MEMCHUNK: 159 if (m68k_num_memory < NUM_MEMINFO) { 160 m68k_memory[m68k_num_memory].addr = data[0]; 161 m68k_memory[m68k_num_memory].size = data[1]; 162 m68k_num_memory++; 163 } else 164 printk("m68k_parse_bootinfo: too many memory chunks\n"); 165 break; 166 167 case BI_RAMDISK: 168 m68k_ramdisk.addr = data[0]; 169 m68k_ramdisk.size = data[1]; 170 break; 171 172 case BI_COMMAND_LINE: 173 strlcpy(m68k_command_line, (const char *)data, 174 sizeof(m68k_command_line)); 175 break; 176 177 default: 178 if (MACH_IS_AMIGA) 179 unknown = amiga_parse_bootinfo(record); 180 else if (MACH_IS_ATARI) 181 unknown = atari_parse_bootinfo(record); 182 else if (MACH_IS_MAC) 183 unknown = mac_parse_bootinfo(record); 184 else if (MACH_IS_Q40) 185 unknown = q40_parse_bootinfo(record); 186 else if (MACH_IS_BVME6000) 187 unknown = bvme6000_parse_bootinfo(record); 188 else if (MACH_IS_MVME16x) 189 unknown = mvme16x_parse_bootinfo(record); 190 else if (MACH_IS_MVME147) 191 unknown = mvme147_parse_bootinfo(record); 192 else if (MACH_IS_HP300) 193 unknown = hp300_parse_bootinfo(record); 194 else if (MACH_IS_APOLLO) 195 unknown = apollo_parse_bootinfo(record); 196 else 197 unknown = 1; 198 } 199 if (unknown) 200 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", 201 record->tag); 202 record = (struct bi_record *)((unsigned long)record + 203 record->size); 204 } 205 206 m68k_realnum_memory = m68k_num_memory; 207 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 208 if (m68k_num_memory > 1) { 209 printk("Ignoring last %i chunks of physical memory\n", 210 (m68k_num_memory - 1)); 211 m68k_num_memory = 1; 212 } 213 #endif 214 } 215 216 void __init setup_arch(char **cmdline_p) 217 { 218 #ifndef CONFIG_SUN3 219 int i; 220 #endif 221 222 /* The bootinfo is located right after the kernel bss */ 223 if (!CPU_IS_COLDFIRE) 224 m68k_parse_bootinfo((const struct bi_record *)_end); 225 226 if (CPU_IS_040) 227 m68k_is040or060 = 4; 228 else if (CPU_IS_060) 229 m68k_is040or060 = 6; 230 231 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 232 * be confused by software FPU emulation. BEWARE. 233 * We should really do our own FPU check at startup. 234 * [what do we do with buggy 68LC040s? if we have problems 235 * with them, we should add a test to check_bugs() below] */ 236 #ifndef CONFIG_M68KFPU_EMU_ONLY 237 /* clear the fpu if we have one */ 238 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) { 239 volatile int zero = 0; 240 asm volatile ("frestore %0" : : "m" (zero)); 241 } 242 #endif 243 244 if (CPU_IS_060) { 245 u32 pcr; 246 247 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 248 : "=d" (pcr)); 249 if (((pcr >> 8) & 0xff) <= 5) { 250 printk("Enabling workaround for errata I14\n"); 251 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 252 : : "d" (pcr | 0x20)); 253 } 254 } 255 256 init_mm.start_code = PAGE_OFFSET; 257 init_mm.end_code = (unsigned long)_etext; 258 init_mm.end_data = (unsigned long)_edata; 259 init_mm.brk = (unsigned long)_end; 260 261 #if defined(CONFIG_BOOTPARAM) 262 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); 263 m68k_command_line[CL_SIZE - 1] = 0; 264 #endif /* CONFIG_BOOTPARAM */ 265 *cmdline_p = m68k_command_line; 266 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 267 268 parse_early_param(); 269 270 #ifdef CONFIG_DUMMY_CONSOLE 271 conswitchp = &dummy_con; 272 #endif 273 274 switch (m68k_machtype) { 275 #ifdef CONFIG_AMIGA 276 case MACH_AMIGA: 277 config_amiga(); 278 break; 279 #endif 280 #ifdef CONFIG_ATARI 281 case MACH_ATARI: 282 config_atari(); 283 break; 284 #endif 285 #ifdef CONFIG_MAC 286 case MACH_MAC: 287 config_mac(); 288 break; 289 #endif 290 #ifdef CONFIG_SUN3 291 case MACH_SUN3: 292 config_sun3(); 293 break; 294 #endif 295 #ifdef CONFIG_APOLLO 296 case MACH_APOLLO: 297 config_apollo(); 298 break; 299 #endif 300 #ifdef CONFIG_MVME147 301 case MACH_MVME147: 302 config_mvme147(); 303 break; 304 #endif 305 #ifdef CONFIG_MVME16x 306 case MACH_MVME16x: 307 config_mvme16x(); 308 break; 309 #endif 310 #ifdef CONFIG_BVME6000 311 case MACH_BVME6000: 312 config_bvme6000(); 313 break; 314 #endif 315 #ifdef CONFIG_HP300 316 case MACH_HP300: 317 config_hp300(); 318 break; 319 #endif 320 #ifdef CONFIG_Q40 321 case MACH_Q40: 322 config_q40(); 323 break; 324 #endif 325 #ifdef CONFIG_SUN3X 326 case MACH_SUN3X: 327 config_sun3x(); 328 break; 329 #endif 330 #ifdef CONFIG_COLDFIRE 331 case MACH_M54XX: 332 config_BSP(NULL, 0); 333 break; 334 #endif 335 default: 336 panic("No configuration setup"); 337 } 338 339 #ifdef CONFIG_NATFEAT 340 nf_init(); 341 #endif 342 343 paging_init(); 344 345 #ifndef CONFIG_SUN3 346 for (i = 1; i < m68k_num_memory; i++) 347 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr, 348 m68k_memory[i].size); 349 #ifdef CONFIG_BLK_DEV_INITRD 350 if (m68k_ramdisk.size) { 351 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)), 352 m68k_ramdisk.addr, m68k_ramdisk.size, 353 BOOTMEM_DEFAULT); 354 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 355 initrd_end = initrd_start + m68k_ramdisk.size; 356 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 357 } 358 #endif 359 360 #ifdef CONFIG_ATARI 361 if (MACH_IS_ATARI) 362 atari_stram_reserve_pages((void *)availmem); 363 #endif 364 #ifdef CONFIG_SUN3X 365 if (MACH_IS_SUN3X) { 366 dvma_init(); 367 } 368 #endif 369 370 #endif /* !CONFIG_SUN3 */ 371 372 /* set ISA defs early as possible */ 373 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 374 if (MACH_IS_Q40) { 375 isa_type = ISA_TYPE_Q40; 376 isa_sex = 0; 377 } 378 #ifdef CONFIG_AMIGA_PCMCIA 379 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 380 isa_type = ISA_TYPE_AG; 381 isa_sex = 1; 382 } 383 #endif 384 #ifdef CONFIG_ATARI_ROM_ISA 385 if (MACH_IS_ATARI) { 386 isa_type = ISA_TYPE_ENEC; 387 isa_sex = 0; 388 } 389 #endif 390 #endif 391 } 392 393 static int show_cpuinfo(struct seq_file *m, void *v) 394 { 395 const char *cpu, *mmu, *fpu; 396 unsigned long clockfreq, clockfactor; 397 398 #define LOOP_CYCLES_68020 (8) 399 #define LOOP_CYCLES_68030 (8) 400 #define LOOP_CYCLES_68040 (3) 401 #define LOOP_CYCLES_68060 (1) 402 #define LOOP_CYCLES_COLDFIRE (2) 403 404 if (CPU_IS_020) { 405 cpu = "68020"; 406 clockfactor = LOOP_CYCLES_68020; 407 } else if (CPU_IS_030) { 408 cpu = "68030"; 409 clockfactor = LOOP_CYCLES_68030; 410 } else if (CPU_IS_040) { 411 cpu = "68040"; 412 clockfactor = LOOP_CYCLES_68040; 413 } else if (CPU_IS_060) { 414 cpu = "68060"; 415 clockfactor = LOOP_CYCLES_68060; 416 } else if (CPU_IS_COLDFIRE) { 417 cpu = "ColdFire"; 418 clockfactor = LOOP_CYCLES_COLDFIRE; 419 } else { 420 cpu = "680x0"; 421 clockfactor = 0; 422 } 423 424 #ifdef CONFIG_M68KFPU_EMU_ONLY 425 fpu = "none(soft float)"; 426 #else 427 if (m68k_fputype & FPU_68881) 428 fpu = "68881"; 429 else if (m68k_fputype & FPU_68882) 430 fpu = "68882"; 431 else if (m68k_fputype & FPU_68040) 432 fpu = "68040"; 433 else if (m68k_fputype & FPU_68060) 434 fpu = "68060"; 435 else if (m68k_fputype & FPU_SUNFPA) 436 fpu = "Sun FPA"; 437 else if (m68k_fputype & FPU_COLDFIRE) 438 fpu = "ColdFire"; 439 else 440 fpu = "none"; 441 #endif 442 443 if (m68k_mmutype & MMU_68851) 444 mmu = "68851"; 445 else if (m68k_mmutype & MMU_68030) 446 mmu = "68030"; 447 else if (m68k_mmutype & MMU_68040) 448 mmu = "68040"; 449 else if (m68k_mmutype & MMU_68060) 450 mmu = "68060"; 451 else if (m68k_mmutype & MMU_SUN3) 452 mmu = "Sun-3"; 453 else if (m68k_mmutype & MMU_APOLLO) 454 mmu = "Apollo"; 455 else if (m68k_mmutype & MMU_COLDFIRE) 456 mmu = "ColdFire"; 457 else 458 mmu = "unknown"; 459 460 clockfreq = loops_per_jiffy * HZ * clockfactor; 461 462 seq_printf(m, "CPU:\t\t%s\n" 463 "MMU:\t\t%s\n" 464 "FPU:\t\t%s\n" 465 "Clocking:\t%lu.%1luMHz\n" 466 "BogoMips:\t%lu.%02lu\n" 467 "Calibration:\t%lu loops\n", 468 cpu, mmu, fpu, 469 clockfreq/1000000,(clockfreq/100000)%10, 470 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 471 loops_per_jiffy); 472 return 0; 473 } 474 475 static void *c_start(struct seq_file *m, loff_t *pos) 476 { 477 return *pos < 1 ? (void *)1 : NULL; 478 } 479 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 480 { 481 ++*pos; 482 return NULL; 483 } 484 static void c_stop(struct seq_file *m, void *v) 485 { 486 } 487 const struct seq_operations cpuinfo_op = { 488 .start = c_start, 489 .next = c_next, 490 .stop = c_stop, 491 .show = show_cpuinfo, 492 }; 493 494 #ifdef CONFIG_PROC_HARDWARE 495 static int hardware_proc_show(struct seq_file *m, void *v) 496 { 497 char model[80]; 498 unsigned long mem; 499 int i; 500 501 if (mach_get_model) 502 mach_get_model(model); 503 else 504 strcpy(model, "Unknown m68k"); 505 506 seq_printf(m, "Model:\t\t%s\n", model); 507 for (mem = 0, i = 0; i < m68k_num_memory; i++) 508 mem += m68k_memory[i].size; 509 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 510 511 if (mach_get_hardware_list) 512 mach_get_hardware_list(m); 513 514 return 0; 515 } 516 517 static int hardware_proc_open(struct inode *inode, struct file *file) 518 { 519 return single_open(file, hardware_proc_show, NULL); 520 } 521 522 static const struct file_operations hardware_proc_fops = { 523 .open = hardware_proc_open, 524 .read = seq_read, 525 .llseek = seq_lseek, 526 .release = single_release, 527 }; 528 529 static int __init proc_hardware_init(void) 530 { 531 proc_create("hardware", 0, NULL, &hardware_proc_fops); 532 return 0; 533 } 534 module_init(proc_hardware_init); 535 #endif 536 537 void check_bugs(void) 538 { 539 #ifndef CONFIG_M68KFPU_EMU 540 if (m68k_fputype == 0) { 541 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 542 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 543 printk(KERN_EMERG "Upgrade your hardware or join the FPU " 544 "emulation project\n"); 545 panic("no FPU"); 546 } 547 #endif /* !CONFIG_M68KFPU_EMU */ 548 } 549 550 #ifdef CONFIG_ADB 551 static int __init adb_probe_sync_enable (char *str) { 552 extern int __adb_probe_sync; 553 __adb_probe_sync = 1; 554 return 1; 555 } 556 557 __setup("adb_sync", adb_probe_sync_enable); 558 #endif /* CONFIG_ADB */ 559