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/byteorder.h> 30 #include <asm/sections.h> 31 #include <asm/setup.h> 32 #include <asm/fpu.h> 33 #include <asm/irq.h> 34 #include <asm/io.h> 35 #include <asm/machdep.h> 36 #ifdef CONFIG_AMIGA 37 #include <asm/amigahw.h> 38 #endif 39 #ifdef CONFIG_ATARI 40 #include <asm/atarihw.h> 41 #include <asm/atari_stram.h> 42 #endif 43 #ifdef CONFIG_SUN3X 44 #include <asm/dvma.h> 45 #endif 46 #include <asm/natfeat.h> 47 48 #if !FPSTATESIZE || !NR_IRQS 49 #warning No CPU/platform type selected, your kernel will not work! 50 #warning Are you building an allnoconfig kernel? 51 #endif 52 53 unsigned long m68k_machtype; 54 EXPORT_SYMBOL(m68k_machtype); 55 unsigned long m68k_cputype; 56 EXPORT_SYMBOL(m68k_cputype); 57 unsigned long m68k_fputype; 58 unsigned long m68k_mmutype; 59 EXPORT_SYMBOL(m68k_mmutype); 60 #ifdef CONFIG_VME 61 unsigned long vme_brdtype; 62 EXPORT_SYMBOL(vme_brdtype); 63 #endif 64 65 int m68k_is040or060; 66 EXPORT_SYMBOL(m68k_is040or060); 67 68 extern unsigned long availmem; 69 70 int m68k_num_memory; 71 EXPORT_SYMBOL(m68k_num_memory); 72 int m68k_realnum_memory; 73 EXPORT_SYMBOL(m68k_realnum_memory); 74 unsigned long m68k_memoffset; 75 struct m68k_mem_info m68k_memory[NUM_MEMINFO]; 76 EXPORT_SYMBOL(m68k_memory); 77 78 static struct m68k_mem_info m68k_ramdisk __initdata; 79 80 static char m68k_command_line[CL_SIZE] __initdata; 81 82 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL; 83 /* machine dependent irq functions */ 84 void (*mach_init_IRQ) (void) __initdata = NULL; 85 void (*mach_get_model) (char *model); 86 void (*mach_get_hardware_list) (struct seq_file *m); 87 /* machine dependent timer functions */ 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 IS_ENABLED(CONFIG_INPUT_M68K_BEEP) 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 uint16_t tag; 148 149 save_bootinfo(record); 150 151 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) { 152 int unknown = 0; 153 const void *data = record->data; 154 uint16_t size = be16_to_cpu(record->size); 155 156 switch (tag) { 157 case BI_MACHTYPE: 158 case BI_CPUTYPE: 159 case BI_FPUTYPE: 160 case BI_MMUTYPE: 161 /* Already set up by head.S */ 162 break; 163 164 case BI_MEMCHUNK: 165 if (m68k_num_memory < NUM_MEMINFO) { 166 const struct mem_info *m = data; 167 m68k_memory[m68k_num_memory].addr = 168 be32_to_cpu(m->addr); 169 m68k_memory[m68k_num_memory].size = 170 be32_to_cpu(m->size); 171 m68k_num_memory++; 172 } else 173 pr_warn("%s: too many memory chunks\n", 174 __func__); 175 break; 176 177 case BI_RAMDISK: 178 { 179 const struct mem_info *m = data; 180 m68k_ramdisk.addr = be32_to_cpu(m->addr); 181 m68k_ramdisk.size = be32_to_cpu(m->size); 182 } 183 break; 184 185 case BI_COMMAND_LINE: 186 strlcpy(m68k_command_line, data, 187 sizeof(m68k_command_line)); 188 break; 189 190 default: 191 if (MACH_IS_AMIGA) 192 unknown = amiga_parse_bootinfo(record); 193 else if (MACH_IS_ATARI) 194 unknown = atari_parse_bootinfo(record); 195 else if (MACH_IS_MAC) 196 unknown = mac_parse_bootinfo(record); 197 else if (MACH_IS_Q40) 198 unknown = q40_parse_bootinfo(record); 199 else if (MACH_IS_BVME6000) 200 unknown = bvme6000_parse_bootinfo(record); 201 else if (MACH_IS_MVME16x) 202 unknown = mvme16x_parse_bootinfo(record); 203 else if (MACH_IS_MVME147) 204 unknown = mvme147_parse_bootinfo(record); 205 else if (MACH_IS_HP300) 206 unknown = hp300_parse_bootinfo(record); 207 else if (MACH_IS_APOLLO) 208 unknown = apollo_parse_bootinfo(record); 209 else 210 unknown = 1; 211 } 212 if (unknown) 213 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__, 214 tag); 215 record = (struct bi_record *)((unsigned long)record + size); 216 } 217 218 m68k_realnum_memory = m68k_num_memory; 219 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 220 if (m68k_num_memory > 1) { 221 pr_warn("%s: ignoring last %i chunks of physical memory\n", 222 __func__, (m68k_num_memory - 1)); 223 m68k_num_memory = 1; 224 } 225 #endif 226 } 227 228 void __init setup_arch(char **cmdline_p) 229 { 230 #ifndef CONFIG_SUN3 231 int i; 232 #endif 233 234 /* The bootinfo is located right after the kernel */ 235 if (!CPU_IS_COLDFIRE) 236 m68k_parse_bootinfo((const struct bi_record *)_end); 237 238 if (CPU_IS_040) 239 m68k_is040or060 = 4; 240 else if (CPU_IS_060) 241 m68k_is040or060 = 6; 242 243 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 244 * be confused by software FPU emulation. BEWARE. 245 * We should really do our own FPU check at startup. 246 * [what do we do with buggy 68LC040s? if we have problems 247 * with them, we should add a test to check_bugs() below] */ 248 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY) 249 /* clear the fpu if we have one */ 250 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) { 251 volatile int zero = 0; 252 asm volatile ("frestore %0" : : "m" (zero)); 253 } 254 #endif 255 256 if (CPU_IS_060) { 257 u32 pcr; 258 259 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 260 : "=d" (pcr)); 261 if (((pcr >> 8) & 0xff) <= 5) { 262 pr_warn("Enabling workaround for errata I14\n"); 263 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 264 : : "d" (pcr | 0x20)); 265 } 266 } 267 268 init_mm.start_code = PAGE_OFFSET; 269 init_mm.end_code = (unsigned long)_etext; 270 init_mm.end_data = (unsigned long)_edata; 271 init_mm.brk = (unsigned long)_end; 272 273 #if defined(CONFIG_BOOTPARAM) 274 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); 275 m68k_command_line[CL_SIZE - 1] = 0; 276 #endif /* CONFIG_BOOTPARAM */ 277 process_uboot_commandline(&m68k_command_line[0], CL_SIZE); 278 *cmdline_p = m68k_command_line; 279 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 280 281 parse_early_param(); 282 283 #ifdef CONFIG_DUMMY_CONSOLE 284 conswitchp = &dummy_con; 285 #endif 286 287 switch (m68k_machtype) { 288 #ifdef CONFIG_AMIGA 289 case MACH_AMIGA: 290 config_amiga(); 291 break; 292 #endif 293 #ifdef CONFIG_ATARI 294 case MACH_ATARI: 295 config_atari(); 296 break; 297 #endif 298 #ifdef CONFIG_MAC 299 case MACH_MAC: 300 config_mac(); 301 break; 302 #endif 303 #ifdef CONFIG_SUN3 304 case MACH_SUN3: 305 config_sun3(); 306 break; 307 #endif 308 #ifdef CONFIG_APOLLO 309 case MACH_APOLLO: 310 config_apollo(); 311 break; 312 #endif 313 #ifdef CONFIG_MVME147 314 case MACH_MVME147: 315 config_mvme147(); 316 break; 317 #endif 318 #ifdef CONFIG_MVME16x 319 case MACH_MVME16x: 320 config_mvme16x(); 321 break; 322 #endif 323 #ifdef CONFIG_BVME6000 324 case MACH_BVME6000: 325 config_bvme6000(); 326 break; 327 #endif 328 #ifdef CONFIG_HP300 329 case MACH_HP300: 330 config_hp300(); 331 break; 332 #endif 333 #ifdef CONFIG_Q40 334 case MACH_Q40: 335 config_q40(); 336 break; 337 #endif 338 #ifdef CONFIG_SUN3X 339 case MACH_SUN3X: 340 config_sun3x(); 341 break; 342 #endif 343 #ifdef CONFIG_COLDFIRE 344 case MACH_M54XX: 345 case MACH_M5441X: 346 config_BSP(NULL, 0); 347 break; 348 #endif 349 default: 350 panic("No configuration setup"); 351 } 352 353 paging_init(); 354 355 #ifdef CONFIG_NATFEAT 356 nf_init(); 357 #endif 358 359 #ifndef CONFIG_SUN3 360 for (i = 1; i < m68k_num_memory; i++) 361 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr, 362 m68k_memory[i].size); 363 #ifdef CONFIG_BLK_DEV_INITRD 364 if (m68k_ramdisk.size) { 365 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)), 366 m68k_ramdisk.addr, m68k_ramdisk.size, 367 BOOTMEM_DEFAULT); 368 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 369 initrd_end = initrd_start + m68k_ramdisk.size; 370 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 371 } 372 #endif 373 374 #ifdef CONFIG_ATARI 375 if (MACH_IS_ATARI) 376 atari_stram_reserve_pages((void *)availmem); 377 #endif 378 #ifdef CONFIG_SUN3X 379 if (MACH_IS_SUN3X) { 380 dvma_init(); 381 } 382 #endif 383 384 #endif /* !CONFIG_SUN3 */ 385 386 /* set ISA defs early as possible */ 387 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 388 if (MACH_IS_Q40) { 389 isa_type = ISA_TYPE_Q40; 390 isa_sex = 0; 391 } 392 #ifdef CONFIG_AMIGA_PCMCIA 393 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 394 isa_type = ISA_TYPE_AG; 395 isa_sex = 1; 396 } 397 #endif 398 #ifdef CONFIG_ATARI_ROM_ISA 399 if (MACH_IS_ATARI) { 400 isa_type = ISA_TYPE_ENEC; 401 isa_sex = 0; 402 } 403 #endif 404 #endif 405 } 406 407 static int show_cpuinfo(struct seq_file *m, void *v) 408 { 409 const char *cpu, *mmu, *fpu; 410 unsigned long clockfreq, clockfactor; 411 412 #define LOOP_CYCLES_68020 (8) 413 #define LOOP_CYCLES_68030 (8) 414 #define LOOP_CYCLES_68040 (3) 415 #define LOOP_CYCLES_68060 (1) 416 #define LOOP_CYCLES_COLDFIRE (2) 417 418 if (CPU_IS_020) { 419 cpu = "68020"; 420 clockfactor = LOOP_CYCLES_68020; 421 } else if (CPU_IS_030) { 422 cpu = "68030"; 423 clockfactor = LOOP_CYCLES_68030; 424 } else if (CPU_IS_040) { 425 cpu = "68040"; 426 clockfactor = LOOP_CYCLES_68040; 427 } else if (CPU_IS_060) { 428 cpu = "68060"; 429 clockfactor = LOOP_CYCLES_68060; 430 } else if (CPU_IS_COLDFIRE) { 431 cpu = "ColdFire"; 432 clockfactor = LOOP_CYCLES_COLDFIRE; 433 } else { 434 cpu = "680x0"; 435 clockfactor = 0; 436 } 437 438 #ifdef CONFIG_M68KFPU_EMU_ONLY 439 fpu = "none(soft float)"; 440 #else 441 if (m68k_fputype & FPU_68881) 442 fpu = "68881"; 443 else if (m68k_fputype & FPU_68882) 444 fpu = "68882"; 445 else if (m68k_fputype & FPU_68040) 446 fpu = "68040"; 447 else if (m68k_fputype & FPU_68060) 448 fpu = "68060"; 449 else if (m68k_fputype & FPU_SUNFPA) 450 fpu = "Sun FPA"; 451 else if (m68k_fputype & FPU_COLDFIRE) 452 fpu = "ColdFire"; 453 else 454 fpu = "none"; 455 #endif 456 457 if (m68k_mmutype & MMU_68851) 458 mmu = "68851"; 459 else if (m68k_mmutype & MMU_68030) 460 mmu = "68030"; 461 else if (m68k_mmutype & MMU_68040) 462 mmu = "68040"; 463 else if (m68k_mmutype & MMU_68060) 464 mmu = "68060"; 465 else if (m68k_mmutype & MMU_SUN3) 466 mmu = "Sun-3"; 467 else if (m68k_mmutype & MMU_APOLLO) 468 mmu = "Apollo"; 469 else if (m68k_mmutype & MMU_COLDFIRE) 470 mmu = "ColdFire"; 471 else 472 mmu = "unknown"; 473 474 clockfreq = loops_per_jiffy * HZ * clockfactor; 475 476 seq_printf(m, "CPU:\t\t%s\n" 477 "MMU:\t\t%s\n" 478 "FPU:\t\t%s\n" 479 "Clocking:\t%lu.%1luMHz\n" 480 "BogoMips:\t%lu.%02lu\n" 481 "Calibration:\t%lu loops\n", 482 cpu, mmu, fpu, 483 clockfreq/1000000,(clockfreq/100000)%10, 484 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 485 loops_per_jiffy); 486 return 0; 487 } 488 489 static void *c_start(struct seq_file *m, loff_t *pos) 490 { 491 return *pos < 1 ? (void *)1 : NULL; 492 } 493 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 494 { 495 ++*pos; 496 return NULL; 497 } 498 static void c_stop(struct seq_file *m, void *v) 499 { 500 } 501 const struct seq_operations cpuinfo_op = { 502 .start = c_start, 503 .next = c_next, 504 .stop = c_stop, 505 .show = show_cpuinfo, 506 }; 507 508 #ifdef CONFIG_PROC_HARDWARE 509 static int hardware_proc_show(struct seq_file *m, void *v) 510 { 511 char model[80]; 512 unsigned long mem; 513 int i; 514 515 if (mach_get_model) 516 mach_get_model(model); 517 else 518 strcpy(model, "Unknown m68k"); 519 520 seq_printf(m, "Model:\t\t%s\n", model); 521 for (mem = 0, i = 0; i < m68k_num_memory; i++) 522 mem += m68k_memory[i].size; 523 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 524 525 if (mach_get_hardware_list) 526 mach_get_hardware_list(m); 527 528 return 0; 529 } 530 531 static int hardware_proc_open(struct inode *inode, struct file *file) 532 { 533 return single_open(file, hardware_proc_show, NULL); 534 } 535 536 static const struct file_operations hardware_proc_fops = { 537 .open = hardware_proc_open, 538 .read = seq_read, 539 .llseek = seq_lseek, 540 .release = single_release, 541 }; 542 543 static int __init proc_hardware_init(void) 544 { 545 proc_create("hardware", 0, NULL, &hardware_proc_fops); 546 return 0; 547 } 548 module_init(proc_hardware_init); 549 #endif 550 551 void check_bugs(void) 552 { 553 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU) 554 if (m68k_fputype == 0) { 555 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 556 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 557 pr_emerg("Upgrade your hardware or join the FPU " 558 "emulation project\n"); 559 panic("no FPU"); 560 } 561 #endif /* !CONFIG_M68KFPU_EMU */ 562 } 563 564 #ifdef CONFIG_ADB 565 static int __init adb_probe_sync_enable (char *str) { 566 extern int __adb_probe_sync; 567 __adb_probe_sync = 1; 568 return 1; 569 } 570 571 __setup("adb_sync", adb_probe_sync_enable); 572 #endif /* CONFIG_ADB */ 573