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) (irq_handler_t handler) __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 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 103 #ifdef CONFIG_HEARTBEAT 104 void (*mach_heartbeat) (int); 105 EXPORT_SYMBOL(mach_heartbeat); 106 #endif 107 #ifdef CONFIG_M68K_L2_CACHE 108 void (*mach_l2_flush) (int); 109 #endif 110 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 111 int isa_type; 112 int isa_sex; 113 EXPORT_SYMBOL(isa_type); 114 EXPORT_SYMBOL(isa_sex); 115 #endif 116 117 extern int amiga_parse_bootinfo(const struct bi_record *); 118 extern int atari_parse_bootinfo(const struct bi_record *); 119 extern int mac_parse_bootinfo(const struct bi_record *); 120 extern int q40_parse_bootinfo(const struct bi_record *); 121 extern int bvme6000_parse_bootinfo(const struct bi_record *); 122 extern int mvme16x_parse_bootinfo(const struct bi_record *); 123 extern int mvme147_parse_bootinfo(const struct bi_record *); 124 extern int hp300_parse_bootinfo(const struct bi_record *); 125 extern int apollo_parse_bootinfo(const struct bi_record *); 126 127 extern void config_amiga(void); 128 extern void config_atari(void); 129 extern void config_mac(void); 130 extern void config_sun3(void); 131 extern void config_apollo(void); 132 extern void config_mvme147(void); 133 extern void config_mvme16x(void); 134 extern void config_bvme6000(void); 135 extern void config_hp300(void); 136 extern void config_q40(void); 137 extern void config_sun3x(void); 138 139 #define MASK_256K 0xfffc0000 140 141 extern void paging_init(void); 142 143 static void __init m68k_parse_bootinfo(const struct bi_record *record) 144 { 145 uint16_t tag; 146 147 save_bootinfo(record); 148 149 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) { 150 int unknown = 0; 151 const void *data = record->data; 152 uint16_t size = be16_to_cpu(record->size); 153 154 switch (tag) { 155 case BI_MACHTYPE: 156 case BI_CPUTYPE: 157 case BI_FPUTYPE: 158 case BI_MMUTYPE: 159 /* Already set up by head.S */ 160 break; 161 162 case BI_MEMCHUNK: 163 if (m68k_num_memory < NUM_MEMINFO) { 164 const struct mem_info *m = data; 165 m68k_memory[m68k_num_memory].addr = 166 be32_to_cpu(m->addr); 167 m68k_memory[m68k_num_memory].size = 168 be32_to_cpu(m->size); 169 m68k_num_memory++; 170 } else 171 pr_warn("%s: too many memory chunks\n", 172 __func__); 173 break; 174 175 case BI_RAMDISK: 176 { 177 const struct mem_info *m = data; 178 m68k_ramdisk.addr = be32_to_cpu(m->addr); 179 m68k_ramdisk.size = be32_to_cpu(m->size); 180 } 181 break; 182 183 case BI_COMMAND_LINE: 184 strlcpy(m68k_command_line, data, 185 sizeof(m68k_command_line)); 186 break; 187 188 default: 189 if (MACH_IS_AMIGA) 190 unknown = amiga_parse_bootinfo(record); 191 else if (MACH_IS_ATARI) 192 unknown = atari_parse_bootinfo(record); 193 else if (MACH_IS_MAC) 194 unknown = mac_parse_bootinfo(record); 195 else if (MACH_IS_Q40) 196 unknown = q40_parse_bootinfo(record); 197 else if (MACH_IS_BVME6000) 198 unknown = bvme6000_parse_bootinfo(record); 199 else if (MACH_IS_MVME16x) 200 unknown = mvme16x_parse_bootinfo(record); 201 else if (MACH_IS_MVME147) 202 unknown = mvme147_parse_bootinfo(record); 203 else if (MACH_IS_HP300) 204 unknown = hp300_parse_bootinfo(record); 205 else if (MACH_IS_APOLLO) 206 unknown = apollo_parse_bootinfo(record); 207 else 208 unknown = 1; 209 } 210 if (unknown) 211 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__, 212 tag); 213 record = (struct bi_record *)((unsigned long)record + size); 214 } 215 216 m68k_realnum_memory = m68k_num_memory; 217 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 218 if (m68k_num_memory > 1) { 219 pr_warn("%s: ignoring last %i chunks of physical memory\n", 220 __func__, (m68k_num_memory - 1)); 221 m68k_num_memory = 1; 222 } 223 #endif 224 } 225 226 void __init setup_arch(char **cmdline_p) 227 { 228 /* The bootinfo is located right after the kernel */ 229 if (!CPU_IS_COLDFIRE) 230 m68k_parse_bootinfo((const struct bi_record *)_end); 231 232 if (CPU_IS_040) 233 m68k_is040or060 = 4; 234 else if (CPU_IS_060) 235 m68k_is040or060 = 6; 236 237 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 238 * be confused by software FPU emulation. BEWARE. 239 * We should really do our own FPU check at startup. 240 * [what do we do with buggy 68LC040s? if we have problems 241 * with them, we should add a test to check_bugs() below] */ 242 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY) 243 /* clear the fpu if we have one */ 244 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) { 245 volatile int zero = 0; 246 asm volatile ("frestore %0" : : "m" (zero)); 247 } 248 #endif 249 250 if (CPU_IS_060) { 251 u32 pcr; 252 253 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 254 : "=d" (pcr)); 255 if (((pcr >> 8) & 0xff) <= 5) { 256 pr_warn("Enabling workaround for errata I14\n"); 257 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 258 : : "d" (pcr | 0x20)); 259 } 260 } 261 262 init_mm.start_code = PAGE_OFFSET; 263 init_mm.end_code = (unsigned long)_etext; 264 init_mm.end_data = (unsigned long)_edata; 265 init_mm.brk = (unsigned long)_end; 266 267 #if defined(CONFIG_BOOTPARAM) 268 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); 269 m68k_command_line[CL_SIZE - 1] = 0; 270 #endif /* CONFIG_BOOTPARAM */ 271 process_uboot_commandline(&m68k_command_line[0], CL_SIZE); 272 *cmdline_p = m68k_command_line; 273 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 274 275 parse_early_param(); 276 277 switch (m68k_machtype) { 278 #ifdef CONFIG_AMIGA 279 case MACH_AMIGA: 280 config_amiga(); 281 break; 282 #endif 283 #ifdef CONFIG_ATARI 284 case MACH_ATARI: 285 config_atari(); 286 break; 287 #endif 288 #ifdef CONFIG_MAC 289 case MACH_MAC: 290 config_mac(); 291 break; 292 #endif 293 #ifdef CONFIG_SUN3 294 case MACH_SUN3: 295 config_sun3(); 296 break; 297 #endif 298 #ifdef CONFIG_APOLLO 299 case MACH_APOLLO: 300 config_apollo(); 301 break; 302 #endif 303 #ifdef CONFIG_MVME147 304 case MACH_MVME147: 305 config_mvme147(); 306 break; 307 #endif 308 #ifdef CONFIG_MVME16x 309 case MACH_MVME16x: 310 config_mvme16x(); 311 break; 312 #endif 313 #ifdef CONFIG_BVME6000 314 case MACH_BVME6000: 315 config_bvme6000(); 316 break; 317 #endif 318 #ifdef CONFIG_HP300 319 case MACH_HP300: 320 config_hp300(); 321 break; 322 #endif 323 #ifdef CONFIG_Q40 324 case MACH_Q40: 325 config_q40(); 326 break; 327 #endif 328 #ifdef CONFIG_SUN3X 329 case MACH_SUN3X: 330 config_sun3x(); 331 break; 332 #endif 333 #ifdef CONFIG_COLDFIRE 334 case MACH_M54XX: 335 case MACH_M5441X: 336 cf_bootmem_alloc(); 337 cf_mmu_context_init(); 338 config_BSP(NULL, 0); 339 break; 340 #endif 341 default: 342 panic("No configuration setup"); 343 } 344 345 paging_init(); 346 347 #ifdef CONFIG_NATFEAT 348 nf_init(); 349 #endif 350 351 #ifndef CONFIG_SUN3 352 #ifdef CONFIG_BLK_DEV_INITRD 353 if (m68k_ramdisk.size) { 354 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size); 355 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 356 initrd_end = initrd_start + m68k_ramdisk.size; 357 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 358 } 359 #endif 360 361 #ifdef CONFIG_ATARI 362 if (MACH_IS_ATARI) 363 atari_stram_reserve_pages((void *)availmem); 364 #endif 365 #ifdef CONFIG_SUN3X 366 if (MACH_IS_SUN3X) { 367 dvma_init(); 368 } 369 #endif 370 371 #endif /* !CONFIG_SUN3 */ 372 373 /* set ISA defs early as possible */ 374 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 375 if (MACH_IS_Q40) { 376 isa_type = ISA_TYPE_Q40; 377 isa_sex = 0; 378 } 379 #ifdef CONFIG_AMIGA_PCMCIA 380 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 381 isa_type = ISA_TYPE_AG; 382 isa_sex = 1; 383 } 384 #endif 385 #ifdef CONFIG_ATARI_ROM_ISA 386 if (MACH_IS_ATARI) { 387 isa_type = ISA_TYPE_ENEC; 388 isa_sex = 0; 389 } 390 #endif 391 #endif 392 } 393 394 static int show_cpuinfo(struct seq_file *m, void *v) 395 { 396 const char *cpu, *mmu, *fpu; 397 unsigned long clockfreq, clockfactor; 398 399 #define LOOP_CYCLES_68020 (8) 400 #define LOOP_CYCLES_68030 (8) 401 #define LOOP_CYCLES_68040 (3) 402 #define LOOP_CYCLES_68060 (1) 403 #define LOOP_CYCLES_COLDFIRE (2) 404 405 if (CPU_IS_020) { 406 cpu = "68020"; 407 clockfactor = LOOP_CYCLES_68020; 408 } else if (CPU_IS_030) { 409 cpu = "68030"; 410 clockfactor = LOOP_CYCLES_68030; 411 } else if (CPU_IS_040) { 412 cpu = "68040"; 413 clockfactor = LOOP_CYCLES_68040; 414 } else if (CPU_IS_060) { 415 cpu = "68060"; 416 clockfactor = LOOP_CYCLES_68060; 417 } else if (CPU_IS_COLDFIRE) { 418 cpu = "ColdFire"; 419 clockfactor = LOOP_CYCLES_COLDFIRE; 420 } else { 421 cpu = "680x0"; 422 clockfactor = 0; 423 } 424 425 #ifdef CONFIG_M68KFPU_EMU_ONLY 426 fpu = "none(soft float)"; 427 #else 428 if (m68k_fputype & FPU_68881) 429 fpu = "68881"; 430 else if (m68k_fputype & FPU_68882) 431 fpu = "68882"; 432 else if (m68k_fputype & FPU_68040) 433 fpu = "68040"; 434 else if (m68k_fputype & FPU_68060) 435 fpu = "68060"; 436 else if (m68k_fputype & FPU_SUNFPA) 437 fpu = "Sun FPA"; 438 else if (m68k_fputype & FPU_COLDFIRE) 439 fpu = "ColdFire"; 440 else 441 fpu = "none"; 442 #endif 443 444 if (m68k_mmutype & MMU_68851) 445 mmu = "68851"; 446 else if (m68k_mmutype & MMU_68030) 447 mmu = "68030"; 448 else if (m68k_mmutype & MMU_68040) 449 mmu = "68040"; 450 else if (m68k_mmutype & MMU_68060) 451 mmu = "68060"; 452 else if (m68k_mmutype & MMU_SUN3) 453 mmu = "Sun-3"; 454 else if (m68k_mmutype & MMU_APOLLO) 455 mmu = "Apollo"; 456 else if (m68k_mmutype & MMU_COLDFIRE) 457 mmu = "ColdFire"; 458 else 459 mmu = "unknown"; 460 461 clockfreq = loops_per_jiffy * HZ * clockfactor; 462 463 seq_printf(m, "CPU:\t\t%s\n" 464 "MMU:\t\t%s\n" 465 "FPU:\t\t%s\n" 466 "Clocking:\t%lu.%1luMHz\n" 467 "BogoMips:\t%lu.%02lu\n" 468 "Calibration:\t%lu loops\n", 469 cpu, mmu, fpu, 470 clockfreq/1000000,(clockfreq/100000)%10, 471 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 472 loops_per_jiffy); 473 return 0; 474 } 475 476 static void *c_start(struct seq_file *m, loff_t *pos) 477 { 478 return *pos < 1 ? (void *)1 : NULL; 479 } 480 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 481 { 482 ++*pos; 483 return NULL; 484 } 485 static void c_stop(struct seq_file *m, void *v) 486 { 487 } 488 const struct seq_operations cpuinfo_op = { 489 .start = c_start, 490 .next = c_next, 491 .stop = c_stop, 492 .show = show_cpuinfo, 493 }; 494 495 #ifdef CONFIG_PROC_HARDWARE 496 static int hardware_proc_show(struct seq_file *m, void *v) 497 { 498 char model[80]; 499 unsigned long mem; 500 int i; 501 502 if (mach_get_model) 503 mach_get_model(model); 504 else 505 strcpy(model, "Unknown m68k"); 506 507 seq_printf(m, "Model:\t\t%s\n", model); 508 for (mem = 0, i = 0; i < m68k_num_memory; i++) 509 mem += m68k_memory[i].size; 510 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 511 512 if (mach_get_hardware_list) 513 mach_get_hardware_list(m); 514 515 return 0; 516 } 517 518 static int __init proc_hardware_init(void) 519 { 520 proc_create_single("hardware", 0, NULL, hardware_proc_show); 521 return 0; 522 } 523 module_init(proc_hardware_init); 524 #endif 525 526 void check_bugs(void) 527 { 528 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU) 529 if (m68k_fputype == 0) { 530 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 531 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 532 pr_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 */ 548 549 #if IS_ENABLED(CONFIG_NVRAM) 550 #ifdef CONFIG_MAC 551 static unsigned char m68k_nvram_read_byte(int addr) 552 { 553 if (MACH_IS_MAC) 554 return mac_pram_read_byte(addr); 555 return 0xff; 556 } 557 558 static void m68k_nvram_write_byte(unsigned char val, int addr) 559 { 560 if (MACH_IS_MAC) 561 mac_pram_write_byte(val, addr); 562 } 563 #endif /* CONFIG_MAC */ 564 565 #ifdef CONFIG_ATARI 566 static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos) 567 { 568 if (MACH_IS_ATARI) 569 return atari_nvram_read(buf, count, ppos); 570 else if (MACH_IS_MAC) 571 return nvram_read_bytes(buf, count, ppos); 572 return -EINVAL; 573 } 574 575 static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos) 576 { 577 if (MACH_IS_ATARI) 578 return atari_nvram_write(buf, count, ppos); 579 else if (MACH_IS_MAC) 580 return nvram_write_bytes(buf, count, ppos); 581 return -EINVAL; 582 } 583 584 static long m68k_nvram_set_checksum(void) 585 { 586 if (MACH_IS_ATARI) 587 return atari_nvram_set_checksum(); 588 return -EINVAL; 589 } 590 591 static long m68k_nvram_initialize(void) 592 { 593 if (MACH_IS_ATARI) 594 return atari_nvram_initialize(); 595 return -EINVAL; 596 } 597 #endif /* CONFIG_ATARI */ 598 599 static ssize_t m68k_nvram_get_size(void) 600 { 601 if (MACH_IS_ATARI) 602 return atari_nvram_get_size(); 603 else if (MACH_IS_MAC) 604 return mac_pram_get_size(); 605 return -ENODEV; 606 } 607 608 /* Atari device drivers call .read (to get checksum validation) whereas 609 * Mac and PowerMac device drivers just use .read_byte. 610 */ 611 const struct nvram_ops arch_nvram_ops = { 612 #ifdef CONFIG_MAC 613 .read_byte = m68k_nvram_read_byte, 614 .write_byte = m68k_nvram_write_byte, 615 #endif 616 #ifdef CONFIG_ATARI 617 .read = m68k_nvram_read, 618 .write = m68k_nvram_write, 619 .set_checksum = m68k_nvram_set_checksum, 620 .initialize = m68k_nvram_initialize, 621 #endif 622 .get_size = m68k_nvram_get_size, 623 }; 624 EXPORT_SYMBOL(arch_nvram_ops); 625 #endif /* CONFIG_NVRAM */ 626