1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/arch/m68k/kernel/setup.c 4 * 5 * Copyright (C) 1995 Hamish Macdonald 6 */ 7 8 /* 9 * This file handles the architecture-dependent parts of system setup 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/mm.h> 14 #include <linux/sched.h> 15 #include <linux/delay.h> 16 #include <linux/interrupt.h> 17 #include <linux/fs.h> 18 #include <linux/console.h> 19 #include <linux/genhd.h> 20 #include <linux/errno.h> 21 #include <linux/string.h> 22 #include <linux/init.h> 23 #include <linux/memblock.h> 24 #include <linux/proc_fs.h> 25 #include <linux/seq_file.h> 26 #include <linux/module.h> 27 #include <linux/nvram.h> 28 #include <linux/initrd.h> 29 30 #include <asm/bootinfo.h> 31 #include <asm/byteorder.h> 32 #include <asm/sections.h> 33 #include <asm/setup.h> 34 #include <asm/fpu.h> 35 #include <asm/irq.h> 36 #include <asm/io.h> 37 #include <asm/machdep.h> 38 #ifdef CONFIG_AMIGA 39 #include <asm/amigahw.h> 40 #endif 41 #include <asm/atarihw.h> 42 #ifdef CONFIG_ATARI 43 #include <asm/atari_stram.h> 44 #endif 45 #ifdef CONFIG_SUN3X 46 #include <asm/dvma.h> 47 #endif 48 #include <asm/macintosh.h> 49 #include <asm/natfeat.h> 50 51 #if !FPSTATESIZE || !NR_IRQS 52 #warning No CPU/platform type selected, your kernel will not work! 53 #warning Are you building an allnoconfig kernel? 54 #endif 55 56 unsigned long m68k_machtype; 57 EXPORT_SYMBOL(m68k_machtype); 58 unsigned long m68k_cputype; 59 EXPORT_SYMBOL(m68k_cputype); 60 unsigned long m68k_fputype; 61 unsigned long m68k_mmutype; 62 EXPORT_SYMBOL(m68k_mmutype); 63 #ifdef CONFIG_VME 64 unsigned long vme_brdtype; 65 EXPORT_SYMBOL(vme_brdtype); 66 #endif 67 68 int m68k_is040or060; 69 EXPORT_SYMBOL(m68k_is040or060); 70 71 extern unsigned long availmem; 72 73 int m68k_num_memory; 74 EXPORT_SYMBOL(m68k_num_memory); 75 int m68k_realnum_memory; 76 EXPORT_SYMBOL(m68k_realnum_memory); 77 unsigned long m68k_memoffset; 78 struct m68k_mem_info m68k_memory[NUM_MEMINFO]; 79 EXPORT_SYMBOL(m68k_memory); 80 81 static struct m68k_mem_info m68k_ramdisk __initdata; 82 83 static char m68k_command_line[CL_SIZE] __initdata; 84 85 void (*mach_sched_init) (void) __initdata = NULL; 86 /* machine dependent irq functions */ 87 void (*mach_init_IRQ) (void) __initdata = NULL; 88 void (*mach_get_model) (char *model); 89 void (*mach_get_hardware_list) (struct seq_file *m); 90 /* machine dependent timer functions */ 91 int (*mach_hwclk) (int, struct rtc_time*); 92 EXPORT_SYMBOL(mach_hwclk); 93 unsigned int (*mach_get_ss)(void); 94 int (*mach_get_rtc_pll)(struct rtc_pll_info *); 95 int (*mach_set_rtc_pll)(struct rtc_pll_info *); 96 EXPORT_SYMBOL(mach_get_ss); 97 EXPORT_SYMBOL(mach_get_rtc_pll); 98 EXPORT_SYMBOL(mach_set_rtc_pll); 99 void (*mach_reset)( void ); 100 void (*mach_halt)( void ); 101 void (*mach_power_off)( void ); 102 #ifdef CONFIG_HEARTBEAT 103 void (*mach_heartbeat) (int); 104 EXPORT_SYMBOL(mach_heartbeat); 105 #endif 106 #ifdef CONFIG_M68K_L2_CACHE 107 void (*mach_l2_flush) (int); 108 #endif 109 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 110 int isa_type; 111 int isa_sex; 112 EXPORT_SYMBOL(isa_type); 113 EXPORT_SYMBOL(isa_sex); 114 #endif 115 116 extern int amiga_parse_bootinfo(const struct bi_record *); 117 extern int atari_parse_bootinfo(const struct bi_record *); 118 extern int mac_parse_bootinfo(const struct bi_record *); 119 extern int q40_parse_bootinfo(const struct bi_record *); 120 extern int bvme6000_parse_bootinfo(const struct bi_record *); 121 extern int mvme16x_parse_bootinfo(const struct bi_record *); 122 extern int mvme147_parse_bootinfo(const struct bi_record *); 123 extern int hp300_parse_bootinfo(const struct bi_record *); 124 extern int apollo_parse_bootinfo(const struct bi_record *); 125 126 extern void config_amiga(void); 127 extern void config_atari(void); 128 extern void config_mac(void); 129 extern void config_sun3(void); 130 extern void config_apollo(void); 131 extern void config_mvme147(void); 132 extern void config_mvme16x(void); 133 extern void config_bvme6000(void); 134 extern void config_hp300(void); 135 extern void config_q40(void); 136 extern void config_sun3x(void); 137 138 #define MASK_256K 0xfffc0000 139 140 extern void paging_init(void); 141 142 static void __init m68k_parse_bootinfo(const struct bi_record *record) 143 { 144 uint16_t tag; 145 146 save_bootinfo(record); 147 148 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) { 149 int unknown = 0; 150 const void *data = record->data; 151 uint16_t size = be16_to_cpu(record->size); 152 153 switch (tag) { 154 case BI_MACHTYPE: 155 case BI_CPUTYPE: 156 case BI_FPUTYPE: 157 case BI_MMUTYPE: 158 /* Already set up by head.S */ 159 break; 160 161 case BI_MEMCHUNK: 162 if (m68k_num_memory < NUM_MEMINFO) { 163 const struct mem_info *m = data; 164 m68k_memory[m68k_num_memory].addr = 165 be32_to_cpu(m->addr); 166 m68k_memory[m68k_num_memory].size = 167 be32_to_cpu(m->size); 168 m68k_num_memory++; 169 } else 170 pr_warn("%s: too many memory chunks\n", 171 __func__); 172 break; 173 174 case BI_RAMDISK: 175 { 176 const struct mem_info *m = data; 177 m68k_ramdisk.addr = be32_to_cpu(m->addr); 178 m68k_ramdisk.size = be32_to_cpu(m->size); 179 } 180 break; 181 182 case BI_COMMAND_LINE: 183 strlcpy(m68k_command_line, data, 184 sizeof(m68k_command_line)); 185 break; 186 187 default: 188 if (MACH_IS_AMIGA) 189 unknown = amiga_parse_bootinfo(record); 190 else if (MACH_IS_ATARI) 191 unknown = atari_parse_bootinfo(record); 192 else if (MACH_IS_MAC) 193 unknown = mac_parse_bootinfo(record); 194 else if (MACH_IS_Q40) 195 unknown = q40_parse_bootinfo(record); 196 else if (MACH_IS_BVME6000) 197 unknown = bvme6000_parse_bootinfo(record); 198 else if (MACH_IS_MVME16x) 199 unknown = mvme16x_parse_bootinfo(record); 200 else if (MACH_IS_MVME147) 201 unknown = mvme147_parse_bootinfo(record); 202 else if (MACH_IS_HP300) 203 unknown = hp300_parse_bootinfo(record); 204 else if (MACH_IS_APOLLO) 205 unknown = apollo_parse_bootinfo(record); 206 else 207 unknown = 1; 208 } 209 if (unknown) 210 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__, 211 tag); 212 record = (struct bi_record *)((unsigned long)record + size); 213 } 214 215 m68k_realnum_memory = m68k_num_memory; 216 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 217 if (m68k_num_memory > 1) { 218 pr_warn("%s: ignoring last %i chunks of physical memory\n", 219 __func__, (m68k_num_memory - 1)); 220 m68k_num_memory = 1; 221 } 222 #endif 223 } 224 225 void __init setup_arch(char **cmdline_p) 226 { 227 /* The bootinfo is located right after the kernel */ 228 if (!CPU_IS_COLDFIRE) 229 m68k_parse_bootinfo((const struct bi_record *)_end); 230 231 if (CPU_IS_040) 232 m68k_is040or060 = 4; 233 else if (CPU_IS_060) 234 m68k_is040or060 = 6; 235 236 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 237 * be confused by software FPU emulation. BEWARE. 238 * We should really do our own FPU check at startup. 239 * [what do we do with buggy 68LC040s? if we have problems 240 * with them, we should add a test to check_bugs() below] */ 241 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY) 242 /* clear the fpu if we have one */ 243 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) { 244 volatile int zero = 0; 245 asm volatile ("frestore %0" : : "m" (zero)); 246 } 247 #endif 248 249 if (CPU_IS_060) { 250 u32 pcr; 251 252 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 253 : "=d" (pcr)); 254 if (((pcr >> 8) & 0xff) <= 5) { 255 pr_warn("Enabling workaround for errata I14\n"); 256 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 257 : : "d" (pcr | 0x20)); 258 } 259 } 260 261 init_mm.start_code = PAGE_OFFSET; 262 init_mm.end_code = (unsigned long)_etext; 263 init_mm.end_data = (unsigned long)_edata; 264 init_mm.brk = (unsigned long)_end; 265 266 #if defined(CONFIG_BOOTPARAM) 267 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); 268 m68k_command_line[CL_SIZE - 1] = 0; 269 #endif /* CONFIG_BOOTPARAM */ 270 process_uboot_commandline(&m68k_command_line[0], CL_SIZE); 271 *cmdline_p = m68k_command_line; 272 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 273 274 parse_early_param(); 275 276 switch (m68k_machtype) { 277 #ifdef CONFIG_AMIGA 278 case MACH_AMIGA: 279 config_amiga(); 280 break; 281 #endif 282 #ifdef CONFIG_ATARI 283 case MACH_ATARI: 284 config_atari(); 285 break; 286 #endif 287 #ifdef CONFIG_MAC 288 case MACH_MAC: 289 config_mac(); 290 break; 291 #endif 292 #ifdef CONFIG_SUN3 293 case MACH_SUN3: 294 config_sun3(); 295 break; 296 #endif 297 #ifdef CONFIG_APOLLO 298 case MACH_APOLLO: 299 config_apollo(); 300 break; 301 #endif 302 #ifdef CONFIG_MVME147 303 case MACH_MVME147: 304 config_mvme147(); 305 break; 306 #endif 307 #ifdef CONFIG_MVME16x 308 case MACH_MVME16x: 309 config_mvme16x(); 310 break; 311 #endif 312 #ifdef CONFIG_BVME6000 313 case MACH_BVME6000: 314 config_bvme6000(); 315 break; 316 #endif 317 #ifdef CONFIG_HP300 318 case MACH_HP300: 319 config_hp300(); 320 break; 321 #endif 322 #ifdef CONFIG_Q40 323 case MACH_Q40: 324 config_q40(); 325 break; 326 #endif 327 #ifdef CONFIG_SUN3X 328 case MACH_SUN3X: 329 config_sun3x(); 330 break; 331 #endif 332 #ifdef CONFIG_COLDFIRE 333 case MACH_M54XX: 334 case MACH_M5441X: 335 cf_bootmem_alloc(); 336 cf_mmu_context_init(); 337 config_BSP(NULL, 0); 338 break; 339 #endif 340 default: 341 panic("No configuration setup"); 342 } 343 344 paging_init(); 345 346 #ifdef CONFIG_NATFEAT 347 nf_init(); 348 #endif 349 350 #ifndef CONFIG_SUN3 351 #ifdef CONFIG_BLK_DEV_INITRD 352 if (m68k_ramdisk.size) { 353 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size); 354 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 355 initrd_end = initrd_start + m68k_ramdisk.size; 356 pr_info("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 __init proc_hardware_init(void) 518 { 519 proc_create_single("hardware", 0, NULL, hardware_proc_show); 520 return 0; 521 } 522 module_init(proc_hardware_init); 523 #endif 524 525 void check_bugs(void) 526 { 527 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU) 528 if (m68k_fputype == 0) { 529 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 530 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 531 pr_emerg("Upgrade your hardware or join the FPU " 532 "emulation project\n"); 533 panic("no FPU"); 534 } 535 #endif /* !CONFIG_M68KFPU_EMU */ 536 } 537 538 #ifdef CONFIG_ADB 539 static int __init adb_probe_sync_enable (char *str) { 540 extern int __adb_probe_sync; 541 __adb_probe_sync = 1; 542 return 1; 543 } 544 545 __setup("adb_sync", adb_probe_sync_enable); 546 #endif /* CONFIG_ADB */ 547 548 #if IS_ENABLED(CONFIG_NVRAM) 549 #ifdef CONFIG_MAC 550 static unsigned char m68k_nvram_read_byte(int addr) 551 { 552 if (MACH_IS_MAC) 553 return mac_pram_read_byte(addr); 554 return 0xff; 555 } 556 557 static void m68k_nvram_write_byte(unsigned char val, int addr) 558 { 559 if (MACH_IS_MAC) 560 mac_pram_write_byte(val, addr); 561 } 562 #endif /* CONFIG_MAC */ 563 564 #ifdef CONFIG_ATARI 565 static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos) 566 { 567 if (MACH_IS_ATARI) 568 return atari_nvram_read(buf, count, ppos); 569 else if (MACH_IS_MAC) 570 return nvram_read_bytes(buf, count, ppos); 571 return -EINVAL; 572 } 573 574 static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos) 575 { 576 if (MACH_IS_ATARI) 577 return atari_nvram_write(buf, count, ppos); 578 else if (MACH_IS_MAC) 579 return nvram_write_bytes(buf, count, ppos); 580 return -EINVAL; 581 } 582 583 static long m68k_nvram_set_checksum(void) 584 { 585 if (MACH_IS_ATARI) 586 return atari_nvram_set_checksum(); 587 return -EINVAL; 588 } 589 590 static long m68k_nvram_initialize(void) 591 { 592 if (MACH_IS_ATARI) 593 return atari_nvram_initialize(); 594 return -EINVAL; 595 } 596 #endif /* CONFIG_ATARI */ 597 598 static ssize_t m68k_nvram_get_size(void) 599 { 600 if (MACH_IS_ATARI) 601 return atari_nvram_get_size(); 602 else if (MACH_IS_MAC) 603 return mac_pram_get_size(); 604 return -ENODEV; 605 } 606 607 /* Atari device drivers call .read (to get checksum validation) whereas 608 * Mac and PowerMac device drivers just use .read_byte. 609 */ 610 const struct nvram_ops arch_nvram_ops = { 611 #ifdef CONFIG_MAC 612 .read_byte = m68k_nvram_read_byte, 613 .write_byte = m68k_nvram_write_byte, 614 #endif 615 #ifdef CONFIG_ATARI 616 .read = m68k_nvram_read, 617 .write = m68k_nvram_write, 618 .set_checksum = m68k_nvram_set_checksum, 619 .initialize = m68k_nvram_initialize, 620 #endif 621 .get_size = m68k_nvram_get_size, 622 }; 623 EXPORT_SYMBOL(arch_nvram_ops); 624 #endif /* CONFIG_NVRAM */ 625