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 unsigned long (*mach_gettimeoffset) (void); 88 int (*mach_hwclk) (int, struct rtc_time*); 89 EXPORT_SYMBOL(mach_hwclk); 90 int (*mach_set_clock_mmss) (unsigned long); 91 unsigned int (*mach_get_ss)(void); 92 int (*mach_get_rtc_pll)(struct rtc_pll_info *); 93 int (*mach_set_rtc_pll)(struct rtc_pll_info *); 94 EXPORT_SYMBOL(mach_get_ss); 95 EXPORT_SYMBOL(mach_get_rtc_pll); 96 EXPORT_SYMBOL(mach_set_rtc_pll); 97 void (*mach_reset)( void ); 98 void (*mach_halt)( void ); 99 void (*mach_power_off)( void ); 100 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 101 #ifdef CONFIG_HEARTBEAT 102 void (*mach_heartbeat) (int); 103 EXPORT_SYMBOL(mach_heartbeat); 104 #endif 105 #ifdef CONFIG_M68K_L2_CACHE 106 void (*mach_l2_flush) (int); 107 #endif 108 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) 109 void (*mach_beep)(unsigned int, unsigned int); 110 EXPORT_SYMBOL(mach_beep); 111 #endif 112 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 113 int isa_type; 114 int isa_sex; 115 EXPORT_SYMBOL(isa_type); 116 EXPORT_SYMBOL(isa_sex); 117 #endif 118 119 extern int amiga_parse_bootinfo(const struct bi_record *); 120 extern int atari_parse_bootinfo(const struct bi_record *); 121 extern int mac_parse_bootinfo(const struct bi_record *); 122 extern int q40_parse_bootinfo(const struct bi_record *); 123 extern int bvme6000_parse_bootinfo(const struct bi_record *); 124 extern int mvme16x_parse_bootinfo(const struct bi_record *); 125 extern int mvme147_parse_bootinfo(const struct bi_record *); 126 extern int hp300_parse_bootinfo(const struct bi_record *); 127 extern int apollo_parse_bootinfo(const struct bi_record *); 128 129 extern void config_amiga(void); 130 extern void config_atari(void); 131 extern void config_mac(void); 132 extern void config_sun3(void); 133 extern void config_apollo(void); 134 extern void config_mvme147(void); 135 extern void config_mvme16x(void); 136 extern void config_bvme6000(void); 137 extern void config_hp300(void); 138 extern void config_q40(void); 139 extern void config_sun3x(void); 140 141 #define MASK_256K 0xfffc0000 142 143 extern void paging_init(void); 144 145 static void __init m68k_parse_bootinfo(const struct bi_record *record) 146 { 147 while (record->tag != BI_LAST) { 148 int unknown = 0; 149 const unsigned long *data = record->data; 150 151 switch (record->tag) { 152 case BI_MACHTYPE: 153 case BI_CPUTYPE: 154 case BI_FPUTYPE: 155 case BI_MMUTYPE: 156 /* Already set up by head.S */ 157 break; 158 159 case BI_MEMCHUNK: 160 if (m68k_num_memory < NUM_MEMINFO) { 161 m68k_memory[m68k_num_memory].addr = data[0]; 162 m68k_memory[m68k_num_memory].size = data[1]; 163 m68k_num_memory++; 164 } else 165 printk("m68k_parse_bootinfo: too many memory chunks\n"); 166 break; 167 168 case BI_RAMDISK: 169 m68k_ramdisk.addr = data[0]; 170 m68k_ramdisk.size = data[1]; 171 break; 172 173 case BI_COMMAND_LINE: 174 strlcpy(m68k_command_line, (const char *)data, 175 sizeof(m68k_command_line)); 176 break; 177 178 default: 179 if (MACH_IS_AMIGA) 180 unknown = amiga_parse_bootinfo(record); 181 else if (MACH_IS_ATARI) 182 unknown = atari_parse_bootinfo(record); 183 else if (MACH_IS_MAC) 184 unknown = mac_parse_bootinfo(record); 185 else if (MACH_IS_Q40) 186 unknown = q40_parse_bootinfo(record); 187 else if (MACH_IS_BVME6000) 188 unknown = bvme6000_parse_bootinfo(record); 189 else if (MACH_IS_MVME16x) 190 unknown = mvme16x_parse_bootinfo(record); 191 else if (MACH_IS_MVME147) 192 unknown = mvme147_parse_bootinfo(record); 193 else if (MACH_IS_HP300) 194 unknown = hp300_parse_bootinfo(record); 195 else if (MACH_IS_APOLLO) 196 unknown = apollo_parse_bootinfo(record); 197 else 198 unknown = 1; 199 } 200 if (unknown) 201 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", 202 record->tag); 203 record = (struct bi_record *)((unsigned long)record + 204 record->size); 205 } 206 207 m68k_realnum_memory = m68k_num_memory; 208 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 209 if (m68k_num_memory > 1) { 210 printk("Ignoring last %i chunks of physical memory\n", 211 (m68k_num_memory - 1)); 212 m68k_num_memory = 1; 213 } 214 #endif 215 } 216 217 void __init setup_arch(char **cmdline_p) 218 { 219 #ifndef CONFIG_SUN3 220 int i; 221 #endif 222 223 /* The bootinfo is located right after the kernel bss */ 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)) { 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 default: 331 panic("No configuration setup"); 332 } 333 334 #ifdef CONFIG_NATFEAT 335 nf_init(); 336 #endif 337 338 paging_init(); 339 340 #ifndef CONFIG_SUN3 341 for (i = 1; i < m68k_num_memory; i++) 342 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr, 343 m68k_memory[i].size); 344 #ifdef CONFIG_BLK_DEV_INITRD 345 if (m68k_ramdisk.size) { 346 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)), 347 m68k_ramdisk.addr, m68k_ramdisk.size, 348 BOOTMEM_DEFAULT); 349 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 350 initrd_end = initrd_start + m68k_ramdisk.size; 351 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 352 } 353 #endif 354 355 #ifdef CONFIG_ATARI 356 if (MACH_IS_ATARI) 357 atari_stram_reserve_pages((void *)availmem); 358 #endif 359 #ifdef CONFIG_SUN3X 360 if (MACH_IS_SUN3X) { 361 dvma_init(); 362 } 363 #endif 364 365 #endif /* !CONFIG_SUN3 */ 366 367 /* set ISA defs early as possible */ 368 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 369 if (MACH_IS_Q40) { 370 isa_type = ISA_TYPE_Q40; 371 isa_sex = 0; 372 } 373 #ifdef CONFIG_AMIGA_PCMCIA 374 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 375 isa_type = ISA_TYPE_AG; 376 isa_sex = 1; 377 } 378 #endif 379 #endif 380 } 381 382 static int show_cpuinfo(struct seq_file *m, void *v) 383 { 384 const char *cpu, *mmu, *fpu; 385 unsigned long clockfreq, clockfactor; 386 387 #define LOOP_CYCLES_68020 (8) 388 #define LOOP_CYCLES_68030 (8) 389 #define LOOP_CYCLES_68040 (3) 390 #define LOOP_CYCLES_68060 (1) 391 #define LOOP_CYCLES_COLDFIRE (2) 392 393 if (CPU_IS_020) { 394 cpu = "68020"; 395 clockfactor = LOOP_CYCLES_68020; 396 } else if (CPU_IS_030) { 397 cpu = "68030"; 398 clockfactor = LOOP_CYCLES_68030; 399 } else if (CPU_IS_040) { 400 cpu = "68040"; 401 clockfactor = LOOP_CYCLES_68040; 402 } else if (CPU_IS_060) { 403 cpu = "68060"; 404 clockfactor = LOOP_CYCLES_68060; 405 } else if (CPU_IS_COLDFIRE) { 406 cpu = "ColdFire"; 407 clockfactor = LOOP_CYCLES_COLDFIRE; 408 } else { 409 cpu = "680x0"; 410 clockfactor = 0; 411 } 412 413 #ifdef CONFIG_M68KFPU_EMU_ONLY 414 fpu = "none(soft float)"; 415 #else 416 if (m68k_fputype & FPU_68881) 417 fpu = "68881"; 418 else if (m68k_fputype & FPU_68882) 419 fpu = "68882"; 420 else if (m68k_fputype & FPU_68040) 421 fpu = "68040"; 422 else if (m68k_fputype & FPU_68060) 423 fpu = "68060"; 424 else if (m68k_fputype & FPU_SUNFPA) 425 fpu = "Sun FPA"; 426 else if (m68k_fputype & FPU_COLDFIRE) 427 fpu = "ColdFire"; 428 else 429 fpu = "none"; 430 #endif 431 432 if (m68k_mmutype & MMU_68851) 433 mmu = "68851"; 434 else if (m68k_mmutype & MMU_68030) 435 mmu = "68030"; 436 else if (m68k_mmutype & MMU_68040) 437 mmu = "68040"; 438 else if (m68k_mmutype & MMU_68060) 439 mmu = "68060"; 440 else if (m68k_mmutype & MMU_SUN3) 441 mmu = "Sun-3"; 442 else if (m68k_mmutype & MMU_APOLLO) 443 mmu = "Apollo"; 444 else if (m68k_mmutype & MMU_COLDFIRE) 445 mmu = "ColdFire"; 446 else 447 mmu = "unknown"; 448 449 clockfreq = loops_per_jiffy * HZ * clockfactor; 450 451 seq_printf(m, "CPU:\t\t%s\n" 452 "MMU:\t\t%s\n" 453 "FPU:\t\t%s\n" 454 "Clocking:\t%lu.%1luMHz\n" 455 "BogoMips:\t%lu.%02lu\n" 456 "Calibration:\t%lu loops\n", 457 cpu, mmu, fpu, 458 clockfreq/1000000,(clockfreq/100000)%10, 459 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 460 loops_per_jiffy); 461 return 0; 462 } 463 464 static void *c_start(struct seq_file *m, loff_t *pos) 465 { 466 return *pos < 1 ? (void *)1 : NULL; 467 } 468 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 469 { 470 ++*pos; 471 return NULL; 472 } 473 static void c_stop(struct seq_file *m, void *v) 474 { 475 } 476 const struct seq_operations cpuinfo_op = { 477 .start = c_start, 478 .next = c_next, 479 .stop = c_stop, 480 .show = show_cpuinfo, 481 }; 482 483 #ifdef CONFIG_PROC_HARDWARE 484 static int hardware_proc_show(struct seq_file *m, void *v) 485 { 486 char model[80]; 487 unsigned long mem; 488 int i; 489 490 if (mach_get_model) 491 mach_get_model(model); 492 else 493 strcpy(model, "Unknown m68k"); 494 495 seq_printf(m, "Model:\t\t%s\n", model); 496 for (mem = 0, i = 0; i < m68k_num_memory; i++) 497 mem += m68k_memory[i].size; 498 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 499 500 if (mach_get_hardware_list) 501 mach_get_hardware_list(m); 502 503 return 0; 504 } 505 506 static int hardware_proc_open(struct inode *inode, struct file *file) 507 { 508 return single_open(file, hardware_proc_show, NULL); 509 } 510 511 static const struct file_operations hardware_proc_fops = { 512 .open = hardware_proc_open, 513 .read = seq_read, 514 .llseek = seq_lseek, 515 .release = single_release, 516 }; 517 518 static int __init proc_hardware_init(void) 519 { 520 proc_create("hardware", 0, NULL, &hardware_proc_fops); 521 return 0; 522 } 523 module_init(proc_hardware_init); 524 #endif 525 526 void check_bugs(void) 527 { 528 #ifndef CONFIG_M68KFPU_EMU 529 if (m68k_fputype == 0) { 530 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 531 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 532 printk(KERN_EMERG "Upgrade your hardware or join the FPU " 533 "emulation project\n"); 534 panic("no FPU"); 535 } 536 #endif /* !CONFIG_M68KFPU_EMU */ 537 } 538 539 #ifdef CONFIG_ADB 540 static int __init adb_probe_sync_enable (char *str) { 541 extern int __adb_probe_sync; 542 __adb_probe_sync = 1; 543 return 1; 544 } 545 546 __setup("adb_sync", adb_probe_sync_enable); 547 #endif /* CONFIG_ADB */ 548