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 setup_initial_init_mm((void *)PAGE_OFFSET, _etext, _edata, _end); 262 263 #if defined(CONFIG_BOOTPARAM) 264 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); 265 m68k_command_line[CL_SIZE - 1] = 0; 266 #endif /* CONFIG_BOOTPARAM */ 267 process_uboot_commandline(&m68k_command_line[0], CL_SIZE); 268 *cmdline_p = m68k_command_line; 269 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 270 271 parse_early_param(); 272 273 switch (m68k_machtype) { 274 #ifdef CONFIG_AMIGA 275 case MACH_AMIGA: 276 config_amiga(); 277 break; 278 #endif 279 #ifdef CONFIG_ATARI 280 case MACH_ATARI: 281 config_atari(); 282 break; 283 #endif 284 #ifdef CONFIG_MAC 285 case MACH_MAC: 286 config_mac(); 287 break; 288 #endif 289 #ifdef CONFIG_SUN3 290 case MACH_SUN3: 291 config_sun3(); 292 break; 293 #endif 294 #ifdef CONFIG_APOLLO 295 case MACH_APOLLO: 296 config_apollo(); 297 break; 298 #endif 299 #ifdef CONFIG_MVME147 300 case MACH_MVME147: 301 config_mvme147(); 302 break; 303 #endif 304 #ifdef CONFIG_MVME16x 305 case MACH_MVME16x: 306 config_mvme16x(); 307 break; 308 #endif 309 #ifdef CONFIG_BVME6000 310 case MACH_BVME6000: 311 config_bvme6000(); 312 break; 313 #endif 314 #ifdef CONFIG_HP300 315 case MACH_HP300: 316 config_hp300(); 317 break; 318 #endif 319 #ifdef CONFIG_Q40 320 case MACH_Q40: 321 config_q40(); 322 break; 323 #endif 324 #ifdef CONFIG_SUN3X 325 case MACH_SUN3X: 326 config_sun3x(); 327 break; 328 #endif 329 #ifdef CONFIG_COLDFIRE 330 case MACH_M54XX: 331 case MACH_M5441X: 332 cf_bootmem_alloc(); 333 cf_mmu_context_init(); 334 config_BSP(NULL, 0); 335 break; 336 #endif 337 default: 338 panic("No configuration setup"); 339 } 340 341 paging_init(); 342 343 #ifdef CONFIG_NATFEAT 344 nf_init(); 345 #endif 346 347 #ifndef CONFIG_SUN3 348 #ifdef CONFIG_BLK_DEV_INITRD 349 if (m68k_ramdisk.size) { 350 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size); 351 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 352 initrd_end = initrd_start + m68k_ramdisk.size; 353 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 354 } 355 #endif 356 357 #ifdef CONFIG_ATARI 358 if (MACH_IS_ATARI) 359 atari_stram_reserve_pages((void *)availmem); 360 #endif 361 #ifdef CONFIG_SUN3X 362 if (MACH_IS_SUN3X) { 363 dvma_init(); 364 } 365 #endif 366 367 #endif /* !CONFIG_SUN3 */ 368 369 /* set ISA defs early as possible */ 370 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 371 if (MACH_IS_Q40) { 372 isa_type = ISA_TYPE_Q40; 373 isa_sex = 0; 374 } 375 #ifdef CONFIG_AMIGA_PCMCIA 376 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 377 isa_type = ISA_TYPE_AG; 378 isa_sex = 1; 379 } 380 #endif 381 #ifdef CONFIG_ATARI_ROM_ISA 382 if (MACH_IS_ATARI) { 383 isa_type = ISA_TYPE_ENEC; 384 isa_sex = 0; 385 } 386 #endif 387 #endif 388 } 389 390 static int show_cpuinfo(struct seq_file *m, void *v) 391 { 392 const char *cpu, *mmu, *fpu; 393 unsigned long clockfreq, clockfactor; 394 395 #define LOOP_CYCLES_68020 (8) 396 #define LOOP_CYCLES_68030 (8) 397 #define LOOP_CYCLES_68040 (3) 398 #define LOOP_CYCLES_68060 (1) 399 #define LOOP_CYCLES_COLDFIRE (2) 400 401 if (CPU_IS_020) { 402 cpu = "68020"; 403 clockfactor = LOOP_CYCLES_68020; 404 } else if (CPU_IS_030) { 405 cpu = "68030"; 406 clockfactor = LOOP_CYCLES_68030; 407 } else if (CPU_IS_040) { 408 cpu = "68040"; 409 clockfactor = LOOP_CYCLES_68040; 410 } else if (CPU_IS_060) { 411 cpu = "68060"; 412 clockfactor = LOOP_CYCLES_68060; 413 } else if (CPU_IS_COLDFIRE) { 414 cpu = "ColdFire"; 415 clockfactor = LOOP_CYCLES_COLDFIRE; 416 } else { 417 cpu = "680x0"; 418 clockfactor = 0; 419 } 420 421 #ifdef CONFIG_M68KFPU_EMU_ONLY 422 fpu = "none(soft float)"; 423 #else 424 if (m68k_fputype & FPU_68881) 425 fpu = "68881"; 426 else if (m68k_fputype & FPU_68882) 427 fpu = "68882"; 428 else if (m68k_fputype & FPU_68040) 429 fpu = "68040"; 430 else if (m68k_fputype & FPU_68060) 431 fpu = "68060"; 432 else if (m68k_fputype & FPU_SUNFPA) 433 fpu = "Sun FPA"; 434 else if (m68k_fputype & FPU_COLDFIRE) 435 fpu = "ColdFire"; 436 else 437 fpu = "none"; 438 #endif 439 440 if (m68k_mmutype & MMU_68851) 441 mmu = "68851"; 442 else if (m68k_mmutype & MMU_68030) 443 mmu = "68030"; 444 else if (m68k_mmutype & MMU_68040) 445 mmu = "68040"; 446 else if (m68k_mmutype & MMU_68060) 447 mmu = "68060"; 448 else if (m68k_mmutype & MMU_SUN3) 449 mmu = "Sun-3"; 450 else if (m68k_mmutype & MMU_APOLLO) 451 mmu = "Apollo"; 452 else if (m68k_mmutype & MMU_COLDFIRE) 453 mmu = "ColdFire"; 454 else 455 mmu = "unknown"; 456 457 clockfreq = loops_per_jiffy * HZ * clockfactor; 458 459 seq_printf(m, "CPU:\t\t%s\n" 460 "MMU:\t\t%s\n" 461 "FPU:\t\t%s\n" 462 "Clocking:\t%lu.%1luMHz\n" 463 "BogoMips:\t%lu.%02lu\n" 464 "Calibration:\t%lu loops\n", 465 cpu, mmu, fpu, 466 clockfreq/1000000,(clockfreq/100000)%10, 467 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 468 loops_per_jiffy); 469 return 0; 470 } 471 472 static void *c_start(struct seq_file *m, loff_t *pos) 473 { 474 return *pos < 1 ? (void *)1 : NULL; 475 } 476 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 477 { 478 ++*pos; 479 return NULL; 480 } 481 static void c_stop(struct seq_file *m, void *v) 482 { 483 } 484 const struct seq_operations cpuinfo_op = { 485 .start = c_start, 486 .next = c_next, 487 .stop = c_stop, 488 .show = show_cpuinfo, 489 }; 490 491 #ifdef CONFIG_PROC_HARDWARE 492 static int hardware_proc_show(struct seq_file *m, void *v) 493 { 494 char model[80]; 495 unsigned long mem; 496 int i; 497 498 if (mach_get_model) 499 mach_get_model(model); 500 else 501 strcpy(model, "Unknown m68k"); 502 503 seq_printf(m, "Model:\t\t%s\n", model); 504 for (mem = 0, i = 0; i < m68k_num_memory; i++) 505 mem += m68k_memory[i].size; 506 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 507 508 if (mach_get_hardware_list) 509 mach_get_hardware_list(m); 510 511 return 0; 512 } 513 514 static int __init proc_hardware_init(void) 515 { 516 proc_create_single("hardware", 0, NULL, hardware_proc_show); 517 return 0; 518 } 519 module_init(proc_hardware_init); 520 #endif 521 522 void check_bugs(void) 523 { 524 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU) 525 if (m68k_fputype == 0) { 526 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 527 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 528 pr_emerg("Upgrade your hardware or join the FPU " 529 "emulation project\n"); 530 panic("no FPU"); 531 } 532 #endif /* !CONFIG_M68KFPU_EMU */ 533 } 534 535 #ifdef CONFIG_ADB 536 static int __init adb_probe_sync_enable (char *str) { 537 extern int __adb_probe_sync; 538 __adb_probe_sync = 1; 539 return 1; 540 } 541 542 __setup("adb_sync", adb_probe_sync_enable); 543 #endif /* CONFIG_ADB */ 544 545 #if IS_ENABLED(CONFIG_NVRAM) 546 #ifdef CONFIG_MAC 547 static unsigned char m68k_nvram_read_byte(int addr) 548 { 549 if (MACH_IS_MAC) 550 return mac_pram_read_byte(addr); 551 return 0xff; 552 } 553 554 static void m68k_nvram_write_byte(unsigned char val, int addr) 555 { 556 if (MACH_IS_MAC) 557 mac_pram_write_byte(val, addr); 558 } 559 #endif /* CONFIG_MAC */ 560 561 #ifdef CONFIG_ATARI 562 static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos) 563 { 564 if (MACH_IS_ATARI) 565 return atari_nvram_read(buf, count, ppos); 566 else if (MACH_IS_MAC) 567 return nvram_read_bytes(buf, count, ppos); 568 return -EINVAL; 569 } 570 571 static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos) 572 { 573 if (MACH_IS_ATARI) 574 return atari_nvram_write(buf, count, ppos); 575 else if (MACH_IS_MAC) 576 return nvram_write_bytes(buf, count, ppos); 577 return -EINVAL; 578 } 579 580 static long m68k_nvram_set_checksum(void) 581 { 582 if (MACH_IS_ATARI) 583 return atari_nvram_set_checksum(); 584 return -EINVAL; 585 } 586 587 static long m68k_nvram_initialize(void) 588 { 589 if (MACH_IS_ATARI) 590 return atari_nvram_initialize(); 591 return -EINVAL; 592 } 593 #endif /* CONFIG_ATARI */ 594 595 static ssize_t m68k_nvram_get_size(void) 596 { 597 if (MACH_IS_ATARI) 598 return atari_nvram_get_size(); 599 else if (MACH_IS_MAC) 600 return mac_pram_get_size(); 601 return -ENODEV; 602 } 603 604 /* Atari device drivers call .read (to get checksum validation) whereas 605 * Mac and PowerMac device drivers just use .read_byte. 606 */ 607 const struct nvram_ops arch_nvram_ops = { 608 #ifdef CONFIG_MAC 609 .read_byte = m68k_nvram_read_byte, 610 .write_byte = m68k_nvram_write_byte, 611 #endif 612 #ifdef CONFIG_ATARI 613 .read = m68k_nvram_read, 614 .write = m68k_nvram_write, 615 .set_checksum = m68k_nvram_set_checksum, 616 .initialize = m68k_nvram_initialize, 617 #endif 618 .get_size = m68k_nvram_get_size, 619 }; 620 EXPORT_SYMBOL(arch_nvram_ops); 621 #endif /* CONFIG_NVRAM */ 622