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/errno.h> 20 #include <linux/string.h> 21 #include <linux/init.h> 22 #include <linux/memblock.h> 23 #include <linux/proc_fs.h> 24 #include <linux/seq_file.h> 25 #include <linux/module.h> 26 #include <linux/nvram.h> 27 #include <linux/initrd.h> 28 29 #include <asm/bootinfo.h> 30 #include <asm/byteorder.h> 31 #include <asm/sections.h> 32 #include <asm/setup.h> 33 #include <asm/fpu.h> 34 #include <asm/irq.h> 35 #include <asm/io.h> 36 #include <asm/machdep.h> 37 #ifdef CONFIG_AMIGA 38 #include <asm/amigahw.h> 39 #endif 40 #include <asm/atarihw.h> 41 #ifdef CONFIG_ATARI 42 #include <asm/atari_stram.h> 43 #endif 44 #ifdef CONFIG_SUN3X 45 #include <asm/dvma.h> 46 #endif 47 #include <asm/macintosh.h> 48 #include <asm/natfeat.h> 49 #include <asm/config.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 #define MASK_256K 0xfffc0000 117 118 extern void paging_init(void); 119 120 static void __init m68k_parse_bootinfo(const struct bi_record *record) 121 { 122 uint16_t tag; 123 124 save_bootinfo(record); 125 126 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) { 127 int unknown = 0; 128 const void *data = record->data; 129 uint16_t size = be16_to_cpu(record->size); 130 131 switch (tag) { 132 case BI_MACHTYPE: 133 case BI_CPUTYPE: 134 case BI_FPUTYPE: 135 case BI_MMUTYPE: 136 /* Already set up by head.S */ 137 break; 138 139 case BI_MEMCHUNK: 140 if (m68k_num_memory < NUM_MEMINFO) { 141 const struct mem_info *m = data; 142 m68k_memory[m68k_num_memory].addr = 143 be32_to_cpu(m->addr); 144 m68k_memory[m68k_num_memory].size = 145 be32_to_cpu(m->size); 146 m68k_num_memory++; 147 } else 148 pr_warn("%s: too many memory chunks\n", 149 __func__); 150 break; 151 152 case BI_RAMDISK: 153 { 154 const struct mem_info *m = data; 155 m68k_ramdisk.addr = be32_to_cpu(m->addr); 156 m68k_ramdisk.size = be32_to_cpu(m->size); 157 } 158 break; 159 160 case BI_COMMAND_LINE: 161 strlcpy(m68k_command_line, data, 162 sizeof(m68k_command_line)); 163 break; 164 165 default: 166 if (MACH_IS_AMIGA) 167 unknown = amiga_parse_bootinfo(record); 168 else if (MACH_IS_ATARI) 169 unknown = atari_parse_bootinfo(record); 170 else if (MACH_IS_MAC) 171 unknown = mac_parse_bootinfo(record); 172 else if (MACH_IS_Q40) 173 unknown = q40_parse_bootinfo(record); 174 else if (MACH_IS_BVME6000) 175 unknown = bvme6000_parse_bootinfo(record); 176 else if (MACH_IS_MVME16x) 177 unknown = mvme16x_parse_bootinfo(record); 178 else if (MACH_IS_MVME147) 179 unknown = mvme147_parse_bootinfo(record); 180 else if (MACH_IS_HP300) 181 unknown = hp300_parse_bootinfo(record); 182 else if (MACH_IS_APOLLO) 183 unknown = apollo_parse_bootinfo(record); 184 else if (MACH_IS_VIRT) 185 unknown = virt_parse_bootinfo(record); 186 else 187 unknown = 1; 188 } 189 if (unknown) 190 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__, 191 tag); 192 record = (struct bi_record *)((unsigned long)record + size); 193 } 194 195 m68k_realnum_memory = m68k_num_memory; 196 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 197 if (m68k_num_memory > 1) { 198 pr_warn("%s: ignoring last %i chunks of physical memory\n", 199 __func__, (m68k_num_memory - 1)); 200 m68k_num_memory = 1; 201 } 202 #endif 203 } 204 205 void __init setup_arch(char **cmdline_p) 206 { 207 /* The bootinfo is located right after the kernel */ 208 if (!CPU_IS_COLDFIRE) 209 m68k_parse_bootinfo((const struct bi_record *)_end); 210 211 if (CPU_IS_040) 212 m68k_is040or060 = 4; 213 else if (CPU_IS_060) 214 m68k_is040or060 = 6; 215 216 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 217 * be confused by software FPU emulation. BEWARE. 218 * We should really do our own FPU check at startup. 219 * [what do we do with buggy 68LC040s? if we have problems 220 * with them, we should add a test to check_bugs() below] */ 221 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY) 222 /* clear the fpu if we have one */ 223 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) { 224 volatile int zero = 0; 225 asm volatile ("frestore %0" : : "m" (zero)); 226 } 227 #endif 228 229 if (CPU_IS_060) { 230 u32 pcr; 231 232 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 233 : "=d" (pcr)); 234 if (((pcr >> 8) & 0xff) <= 5) { 235 pr_warn("Enabling workaround for errata I14\n"); 236 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 237 : : "d" (pcr | 0x20)); 238 } 239 } 240 241 setup_initial_init_mm((void *)PAGE_OFFSET, _etext, _edata, _end); 242 243 #if defined(CONFIG_BOOTPARAM) 244 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); 245 m68k_command_line[CL_SIZE - 1] = 0; 246 #endif /* CONFIG_BOOTPARAM */ 247 process_uboot_commandline(&m68k_command_line[0], CL_SIZE); 248 *cmdline_p = m68k_command_line; 249 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 250 251 parse_early_param(); 252 253 switch (m68k_machtype) { 254 #ifdef CONFIG_AMIGA 255 case MACH_AMIGA: 256 config_amiga(); 257 break; 258 #endif 259 #ifdef CONFIG_ATARI 260 case MACH_ATARI: 261 config_atari(); 262 break; 263 #endif 264 #ifdef CONFIG_MAC 265 case MACH_MAC: 266 config_mac(); 267 break; 268 #endif 269 #ifdef CONFIG_SUN3 270 case MACH_SUN3: 271 config_sun3(); 272 break; 273 #endif 274 #ifdef CONFIG_APOLLO 275 case MACH_APOLLO: 276 config_apollo(); 277 break; 278 #endif 279 #ifdef CONFIG_MVME147 280 case MACH_MVME147: 281 config_mvme147(); 282 break; 283 #endif 284 #ifdef CONFIG_MVME16x 285 case MACH_MVME16x: 286 config_mvme16x(); 287 break; 288 #endif 289 #ifdef CONFIG_BVME6000 290 case MACH_BVME6000: 291 config_bvme6000(); 292 break; 293 #endif 294 #ifdef CONFIG_HP300 295 case MACH_HP300: 296 config_hp300(); 297 break; 298 #endif 299 #ifdef CONFIG_Q40 300 case MACH_Q40: 301 config_q40(); 302 break; 303 #endif 304 #ifdef CONFIG_SUN3X 305 case MACH_SUN3X: 306 config_sun3x(); 307 break; 308 #endif 309 #ifdef CONFIG_COLDFIRE 310 case MACH_M54XX: 311 case MACH_M5441X: 312 cf_bootmem_alloc(); 313 cf_mmu_context_init(); 314 config_BSP(NULL, 0); 315 break; 316 #endif 317 #ifdef CONFIG_VIRT 318 case MACH_VIRT: 319 config_virt(); 320 break; 321 #endif 322 default: 323 panic("No configuration setup"); 324 } 325 326 #ifdef CONFIG_BLK_DEV_INITRD 327 if (m68k_ramdisk.size) { 328 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size); 329 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 330 initrd_end = initrd_start + m68k_ramdisk.size; 331 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 332 } 333 #endif 334 335 paging_init(); 336 337 #ifdef CONFIG_NATFEAT 338 nf_init(); 339 #endif 340 341 #ifdef CONFIG_ATARI 342 if (MACH_IS_ATARI) 343 atari_stram_reserve_pages((void *)availmem); 344 #endif 345 #ifdef CONFIG_SUN3X 346 if (MACH_IS_SUN3X) { 347 dvma_init(); 348 } 349 #endif 350 351 /* set ISA defs early as possible */ 352 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 353 if (MACH_IS_Q40) { 354 isa_type = ISA_TYPE_Q40; 355 isa_sex = 0; 356 } 357 #ifdef CONFIG_AMIGA_PCMCIA 358 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 359 isa_type = ISA_TYPE_AG; 360 isa_sex = 1; 361 } 362 #endif 363 #ifdef CONFIG_ATARI_ROM_ISA 364 if (MACH_IS_ATARI) { 365 isa_type = ISA_TYPE_ENEC; 366 isa_sex = 0; 367 } 368 #endif 369 #endif 370 } 371 372 static int show_cpuinfo(struct seq_file *m, void *v) 373 { 374 const char *cpu, *mmu, *fpu; 375 unsigned long clockfreq, clockfactor; 376 377 #define LOOP_CYCLES_68020 (8) 378 #define LOOP_CYCLES_68030 (8) 379 #define LOOP_CYCLES_68040 (3) 380 #define LOOP_CYCLES_68060 (1) 381 #define LOOP_CYCLES_COLDFIRE (2) 382 383 if (CPU_IS_020) { 384 cpu = "68020"; 385 clockfactor = LOOP_CYCLES_68020; 386 } else if (CPU_IS_030) { 387 cpu = "68030"; 388 clockfactor = LOOP_CYCLES_68030; 389 } else if (CPU_IS_040) { 390 cpu = "68040"; 391 clockfactor = LOOP_CYCLES_68040; 392 } else if (CPU_IS_060) { 393 cpu = "68060"; 394 clockfactor = LOOP_CYCLES_68060; 395 } else if (CPU_IS_COLDFIRE) { 396 cpu = "ColdFire"; 397 clockfactor = LOOP_CYCLES_COLDFIRE; 398 } else { 399 cpu = "680x0"; 400 clockfactor = 0; 401 } 402 403 #ifdef CONFIG_M68KFPU_EMU_ONLY 404 fpu = "none(soft float)"; 405 #else 406 if (m68k_fputype & FPU_68881) 407 fpu = "68881"; 408 else if (m68k_fputype & FPU_68882) 409 fpu = "68882"; 410 else if (m68k_fputype & FPU_68040) 411 fpu = "68040"; 412 else if (m68k_fputype & FPU_68060) 413 fpu = "68060"; 414 else if (m68k_fputype & FPU_SUNFPA) 415 fpu = "Sun FPA"; 416 else if (m68k_fputype & FPU_COLDFIRE) 417 fpu = "ColdFire"; 418 else 419 fpu = "none"; 420 #endif 421 422 if (m68k_mmutype & MMU_68851) 423 mmu = "68851"; 424 else if (m68k_mmutype & MMU_68030) 425 mmu = "68030"; 426 else if (m68k_mmutype & MMU_68040) 427 mmu = "68040"; 428 else if (m68k_mmutype & MMU_68060) 429 mmu = "68060"; 430 else if (m68k_mmutype & MMU_SUN3) 431 mmu = "Sun-3"; 432 else if (m68k_mmutype & MMU_APOLLO) 433 mmu = "Apollo"; 434 else if (m68k_mmutype & MMU_COLDFIRE) 435 mmu = "ColdFire"; 436 else 437 mmu = "unknown"; 438 439 clockfreq = loops_per_jiffy * HZ * clockfactor; 440 441 seq_printf(m, "CPU:\t\t%s\n" 442 "MMU:\t\t%s\n" 443 "FPU:\t\t%s\n" 444 "Clocking:\t%lu.%1luMHz\n" 445 "BogoMips:\t%lu.%02lu\n" 446 "Calibration:\t%lu loops\n", 447 cpu, mmu, fpu, 448 clockfreq/1000000,(clockfreq/100000)%10, 449 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 450 loops_per_jiffy); 451 return 0; 452 } 453 454 static void *c_start(struct seq_file *m, loff_t *pos) 455 { 456 return *pos < 1 ? (void *)1 : NULL; 457 } 458 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 459 { 460 ++*pos; 461 return NULL; 462 } 463 static void c_stop(struct seq_file *m, void *v) 464 { 465 } 466 const struct seq_operations cpuinfo_op = { 467 .start = c_start, 468 .next = c_next, 469 .stop = c_stop, 470 .show = show_cpuinfo, 471 }; 472 473 #ifdef CONFIG_PROC_HARDWARE 474 static int hardware_proc_show(struct seq_file *m, void *v) 475 { 476 char model[80]; 477 unsigned long mem; 478 int i; 479 480 if (mach_get_model) 481 mach_get_model(model); 482 else 483 strcpy(model, "Unknown m68k"); 484 485 seq_printf(m, "Model:\t\t%s\n", model); 486 for (mem = 0, i = 0; i < m68k_num_memory; i++) 487 mem += m68k_memory[i].size; 488 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 489 490 if (mach_get_hardware_list) 491 mach_get_hardware_list(m); 492 493 return 0; 494 } 495 496 static int __init proc_hardware_init(void) 497 { 498 proc_create_single("hardware", 0, NULL, hardware_proc_show); 499 return 0; 500 } 501 module_init(proc_hardware_init); 502 #endif 503 504 void check_bugs(void) 505 { 506 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU) 507 if (m68k_fputype == 0) { 508 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 509 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 510 pr_emerg("Upgrade your hardware or join the FPU " 511 "emulation project\n"); 512 panic("no FPU"); 513 } 514 #endif /* !CONFIG_M68KFPU_EMU */ 515 } 516 517 #ifdef CONFIG_ADB 518 static int __init adb_probe_sync_enable (char *str) { 519 extern int __adb_probe_sync; 520 __adb_probe_sync = 1; 521 return 1; 522 } 523 524 __setup("adb_sync", adb_probe_sync_enable); 525 #endif /* CONFIG_ADB */ 526 527 #if IS_ENABLED(CONFIG_NVRAM) 528 #ifdef CONFIG_MAC 529 static unsigned char m68k_nvram_read_byte(int addr) 530 { 531 if (MACH_IS_MAC) 532 return mac_pram_read_byte(addr); 533 return 0xff; 534 } 535 536 static void m68k_nvram_write_byte(unsigned char val, int addr) 537 { 538 if (MACH_IS_MAC) 539 mac_pram_write_byte(val, addr); 540 } 541 #endif /* CONFIG_MAC */ 542 543 #ifdef CONFIG_ATARI 544 static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos) 545 { 546 if (MACH_IS_ATARI) 547 return atari_nvram_read(buf, count, ppos); 548 else if (MACH_IS_MAC) 549 return nvram_read_bytes(buf, count, ppos); 550 return -EINVAL; 551 } 552 553 static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos) 554 { 555 if (MACH_IS_ATARI) 556 return atari_nvram_write(buf, count, ppos); 557 else if (MACH_IS_MAC) 558 return nvram_write_bytes(buf, count, ppos); 559 return -EINVAL; 560 } 561 562 static long m68k_nvram_set_checksum(void) 563 { 564 if (MACH_IS_ATARI) 565 return atari_nvram_set_checksum(); 566 return -EINVAL; 567 } 568 569 static long m68k_nvram_initialize(void) 570 { 571 if (MACH_IS_ATARI) 572 return atari_nvram_initialize(); 573 return -EINVAL; 574 } 575 #endif /* CONFIG_ATARI */ 576 577 static ssize_t m68k_nvram_get_size(void) 578 { 579 if (MACH_IS_ATARI) 580 return atari_nvram_get_size(); 581 else if (MACH_IS_MAC) 582 return mac_pram_get_size(); 583 return -ENODEV; 584 } 585 586 /* Atari device drivers call .read (to get checksum validation) whereas 587 * Mac and PowerMac device drivers just use .read_byte. 588 */ 589 const struct nvram_ops arch_nvram_ops = { 590 #ifdef CONFIG_MAC 591 .read_byte = m68k_nvram_read_byte, 592 .write_byte = m68k_nvram_write_byte, 593 #endif 594 #ifdef CONFIG_ATARI 595 .read = m68k_nvram_read, 596 .write = m68k_nvram_write, 597 .set_checksum = m68k_nvram_set_checksum, 598 .initialize = m68k_nvram_initialize, 599 #endif 600 .get_size = m68k_nvram_get_size, 601 }; 602 EXPORT_SYMBOL(arch_nvram_ops); 603 #endif /* CONFIG_NVRAM */ 604