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