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 #endif 385 } 386 387 static int show_cpuinfo(struct seq_file *m, void *v) 388 { 389 const char *cpu, *mmu, *fpu; 390 unsigned long clockfreq, clockfactor; 391 392 #define LOOP_CYCLES_68020 (8) 393 #define LOOP_CYCLES_68030 (8) 394 #define LOOP_CYCLES_68040 (3) 395 #define LOOP_CYCLES_68060 (1) 396 #define LOOP_CYCLES_COLDFIRE (2) 397 398 if (CPU_IS_020) { 399 cpu = "68020"; 400 clockfactor = LOOP_CYCLES_68020; 401 } else if (CPU_IS_030) { 402 cpu = "68030"; 403 clockfactor = LOOP_CYCLES_68030; 404 } else if (CPU_IS_040) { 405 cpu = "68040"; 406 clockfactor = LOOP_CYCLES_68040; 407 } else if (CPU_IS_060) { 408 cpu = "68060"; 409 clockfactor = LOOP_CYCLES_68060; 410 } else if (CPU_IS_COLDFIRE) { 411 cpu = "ColdFire"; 412 clockfactor = LOOP_CYCLES_COLDFIRE; 413 } else { 414 cpu = "680x0"; 415 clockfactor = 0; 416 } 417 418 #ifdef CONFIG_M68KFPU_EMU_ONLY 419 fpu = "none(soft float)"; 420 #else 421 if (m68k_fputype & FPU_68881) 422 fpu = "68881"; 423 else if (m68k_fputype & FPU_68882) 424 fpu = "68882"; 425 else if (m68k_fputype & FPU_68040) 426 fpu = "68040"; 427 else if (m68k_fputype & FPU_68060) 428 fpu = "68060"; 429 else if (m68k_fputype & FPU_SUNFPA) 430 fpu = "Sun FPA"; 431 else if (m68k_fputype & FPU_COLDFIRE) 432 fpu = "ColdFire"; 433 else 434 fpu = "none"; 435 #endif 436 437 if (m68k_mmutype & MMU_68851) 438 mmu = "68851"; 439 else if (m68k_mmutype & MMU_68030) 440 mmu = "68030"; 441 else if (m68k_mmutype & MMU_68040) 442 mmu = "68040"; 443 else if (m68k_mmutype & MMU_68060) 444 mmu = "68060"; 445 else if (m68k_mmutype & MMU_SUN3) 446 mmu = "Sun-3"; 447 else if (m68k_mmutype & MMU_APOLLO) 448 mmu = "Apollo"; 449 else if (m68k_mmutype & MMU_COLDFIRE) 450 mmu = "ColdFire"; 451 else 452 mmu = "unknown"; 453 454 clockfreq = loops_per_jiffy * HZ * clockfactor; 455 456 seq_printf(m, "CPU:\t\t%s\n" 457 "MMU:\t\t%s\n" 458 "FPU:\t\t%s\n" 459 "Clocking:\t%lu.%1luMHz\n" 460 "BogoMips:\t%lu.%02lu\n" 461 "Calibration:\t%lu loops\n", 462 cpu, mmu, fpu, 463 clockfreq/1000000,(clockfreq/100000)%10, 464 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 465 loops_per_jiffy); 466 return 0; 467 } 468 469 static void *c_start(struct seq_file *m, loff_t *pos) 470 { 471 return *pos < 1 ? (void *)1 : NULL; 472 } 473 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 474 { 475 ++*pos; 476 return NULL; 477 } 478 static void c_stop(struct seq_file *m, void *v) 479 { 480 } 481 const struct seq_operations cpuinfo_op = { 482 .start = c_start, 483 .next = c_next, 484 .stop = c_stop, 485 .show = show_cpuinfo, 486 }; 487 488 #ifdef CONFIG_PROC_HARDWARE 489 static int hardware_proc_show(struct seq_file *m, void *v) 490 { 491 char model[80]; 492 unsigned long mem; 493 int i; 494 495 if (mach_get_model) 496 mach_get_model(model); 497 else 498 strcpy(model, "Unknown m68k"); 499 500 seq_printf(m, "Model:\t\t%s\n", model); 501 for (mem = 0, i = 0; i < m68k_num_memory; i++) 502 mem += m68k_memory[i].size; 503 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 504 505 if (mach_get_hardware_list) 506 mach_get_hardware_list(m); 507 508 return 0; 509 } 510 511 static int hardware_proc_open(struct inode *inode, struct file *file) 512 { 513 return single_open(file, hardware_proc_show, NULL); 514 } 515 516 static const struct file_operations hardware_proc_fops = { 517 .open = hardware_proc_open, 518 .read = seq_read, 519 .llseek = seq_lseek, 520 .release = single_release, 521 }; 522 523 static int __init proc_hardware_init(void) 524 { 525 proc_create("hardware", 0, NULL, &hardware_proc_fops); 526 return 0; 527 } 528 module_init(proc_hardware_init); 529 #endif 530 531 void check_bugs(void) 532 { 533 #ifndef CONFIG_M68KFPU_EMU 534 if (m68k_fputype == 0) { 535 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 536 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 537 printk(KERN_EMERG "Upgrade your hardware or join the FPU " 538 "emulation project\n"); 539 panic("no FPU"); 540 } 541 #endif /* !CONFIG_M68KFPU_EMU */ 542 } 543 544 #ifdef CONFIG_ADB 545 static int __init adb_probe_sync_enable (char *str) { 546 extern int __adb_probe_sync; 547 __adb_probe_sync = 1; 548 return 1; 549 } 550 551 __setup("adb_sync", adb_probe_sync_enable); 552 #endif /* CONFIG_ADB */ 553