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/bootmem.h> 24 #include <linux/proc_fs.h> 25 #include <linux/seq_file.h> 26 #include <linux/module.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 #ifdef CONFIG_ATARI 41 #include <asm/atarihw.h> 42 #include <asm/atari_stram.h> 43 #endif 44 #ifdef CONFIG_SUN3X 45 #include <asm/dvma.h> 46 #endif 47 #include <asm/natfeat.h> 48 49 #if !FPSTATESIZE || !NR_IRQS 50 #warning No CPU/platform type selected, your kernel will not work! 51 #warning Are you building an allnoconfig kernel? 52 #endif 53 54 unsigned long m68k_machtype; 55 EXPORT_SYMBOL(m68k_machtype); 56 unsigned long m68k_cputype; 57 EXPORT_SYMBOL(m68k_cputype); 58 unsigned long m68k_fputype; 59 unsigned long m68k_mmutype; 60 EXPORT_SYMBOL(m68k_mmutype); 61 #ifdef CONFIG_VME 62 unsigned long vme_brdtype; 63 EXPORT_SYMBOL(vme_brdtype); 64 #endif 65 66 int m68k_is040or060; 67 EXPORT_SYMBOL(m68k_is040or060); 68 69 extern unsigned long availmem; 70 71 int m68k_num_memory; 72 EXPORT_SYMBOL(m68k_num_memory); 73 int m68k_realnum_memory; 74 EXPORT_SYMBOL(m68k_realnum_memory); 75 unsigned long m68k_memoffset; 76 struct m68k_mem_info m68k_memory[NUM_MEMINFO]; 77 EXPORT_SYMBOL(m68k_memory); 78 79 static struct m68k_mem_info m68k_ramdisk __initdata; 80 81 static char m68k_command_line[CL_SIZE] __initdata; 82 83 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL; 84 /* machine dependent irq functions */ 85 void (*mach_init_IRQ) (void) __initdata = NULL; 86 void (*mach_get_model) (char *model); 87 void (*mach_get_hardware_list) (struct seq_file *m); 88 /* machine dependent timer functions */ 89 int (*mach_hwclk) (int, struct rtc_time*); 90 EXPORT_SYMBOL(mach_hwclk); 91 int (*mach_set_clock_mmss) (unsigned long); 92 unsigned int (*mach_get_ss)(void); 93 int (*mach_get_rtc_pll)(struct rtc_pll_info *); 94 int (*mach_set_rtc_pll)(struct rtc_pll_info *); 95 EXPORT_SYMBOL(mach_get_ss); 96 EXPORT_SYMBOL(mach_get_rtc_pll); 97 EXPORT_SYMBOL(mach_set_rtc_pll); 98 void (*mach_reset)( void ); 99 void (*mach_halt)( void ); 100 void (*mach_power_off)( void ); 101 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 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 IS_ENABLED(CONFIG_INPUT_M68K_BEEP) 110 void (*mach_beep)(unsigned int, unsigned int); 111 EXPORT_SYMBOL(mach_beep); 112 #endif 113 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 114 int isa_type; 115 int isa_sex; 116 EXPORT_SYMBOL(isa_type); 117 EXPORT_SYMBOL(isa_sex); 118 #endif 119 120 extern int amiga_parse_bootinfo(const struct bi_record *); 121 extern int atari_parse_bootinfo(const struct bi_record *); 122 extern int mac_parse_bootinfo(const struct bi_record *); 123 extern int q40_parse_bootinfo(const struct bi_record *); 124 extern int bvme6000_parse_bootinfo(const struct bi_record *); 125 extern int mvme16x_parse_bootinfo(const struct bi_record *); 126 extern int mvme147_parse_bootinfo(const struct bi_record *); 127 extern int hp300_parse_bootinfo(const struct bi_record *); 128 extern int apollo_parse_bootinfo(const struct bi_record *); 129 130 extern void config_amiga(void); 131 extern void config_atari(void); 132 extern void config_mac(void); 133 extern void config_sun3(void); 134 extern void config_apollo(void); 135 extern void config_mvme147(void); 136 extern void config_mvme16x(void); 137 extern void config_bvme6000(void); 138 extern void config_hp300(void); 139 extern void config_q40(void); 140 extern void config_sun3x(void); 141 142 #define MASK_256K 0xfffc0000 143 144 extern void paging_init(void); 145 146 static void __init m68k_parse_bootinfo(const struct bi_record *record) 147 { 148 uint16_t tag; 149 150 save_bootinfo(record); 151 152 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) { 153 int unknown = 0; 154 const void *data = record->data; 155 uint16_t size = be16_to_cpu(record->size); 156 157 switch (tag) { 158 case BI_MACHTYPE: 159 case BI_CPUTYPE: 160 case BI_FPUTYPE: 161 case BI_MMUTYPE: 162 /* Already set up by head.S */ 163 break; 164 165 case BI_MEMCHUNK: 166 if (m68k_num_memory < NUM_MEMINFO) { 167 const struct mem_info *m = data; 168 m68k_memory[m68k_num_memory].addr = 169 be32_to_cpu(m->addr); 170 m68k_memory[m68k_num_memory].size = 171 be32_to_cpu(m->size); 172 m68k_num_memory++; 173 } else 174 pr_warn("%s: too many memory chunks\n", 175 __func__); 176 break; 177 178 case BI_RAMDISK: 179 { 180 const struct mem_info *m = data; 181 m68k_ramdisk.addr = be32_to_cpu(m->addr); 182 m68k_ramdisk.size = be32_to_cpu(m->size); 183 } 184 break; 185 186 case BI_COMMAND_LINE: 187 strlcpy(m68k_command_line, data, 188 sizeof(m68k_command_line)); 189 break; 190 191 default: 192 if (MACH_IS_AMIGA) 193 unknown = amiga_parse_bootinfo(record); 194 else if (MACH_IS_ATARI) 195 unknown = atari_parse_bootinfo(record); 196 else if (MACH_IS_MAC) 197 unknown = mac_parse_bootinfo(record); 198 else if (MACH_IS_Q40) 199 unknown = q40_parse_bootinfo(record); 200 else if (MACH_IS_BVME6000) 201 unknown = bvme6000_parse_bootinfo(record); 202 else if (MACH_IS_MVME16x) 203 unknown = mvme16x_parse_bootinfo(record); 204 else if (MACH_IS_MVME147) 205 unknown = mvme147_parse_bootinfo(record); 206 else if (MACH_IS_HP300) 207 unknown = hp300_parse_bootinfo(record); 208 else if (MACH_IS_APOLLO) 209 unknown = apollo_parse_bootinfo(record); 210 else 211 unknown = 1; 212 } 213 if (unknown) 214 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__, 215 tag); 216 record = (struct bi_record *)((unsigned long)record + size); 217 } 218 219 m68k_realnum_memory = m68k_num_memory; 220 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 221 if (m68k_num_memory > 1) { 222 pr_warn("%s: ignoring last %i chunks of physical memory\n", 223 __func__, (m68k_num_memory - 1)); 224 m68k_num_memory = 1; 225 } 226 #endif 227 } 228 229 void __init setup_arch(char **cmdline_p) 230 { 231 #ifndef CONFIG_SUN3 232 int i; 233 #endif 234 235 /* The bootinfo is located right after the kernel */ 236 if (!CPU_IS_COLDFIRE) 237 m68k_parse_bootinfo((const struct bi_record *)_end); 238 239 if (CPU_IS_040) 240 m68k_is040or060 = 4; 241 else if (CPU_IS_060) 242 m68k_is040or060 = 6; 243 244 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 245 * be confused by software FPU emulation. BEWARE. 246 * We should really do our own FPU check at startup. 247 * [what do we do with buggy 68LC040s? if we have problems 248 * with them, we should add a test to check_bugs() below] */ 249 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY) 250 /* clear the fpu if we have one */ 251 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) { 252 volatile int zero = 0; 253 asm volatile ("frestore %0" : : "m" (zero)); 254 } 255 #endif 256 257 if (CPU_IS_060) { 258 u32 pcr; 259 260 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 261 : "=d" (pcr)); 262 if (((pcr >> 8) & 0xff) <= 5) { 263 pr_warn("Enabling workaround for errata I14\n"); 264 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 265 : : "d" (pcr | 0x20)); 266 } 267 } 268 269 init_mm.start_code = PAGE_OFFSET; 270 init_mm.end_code = (unsigned long)_etext; 271 init_mm.end_data = (unsigned long)_edata; 272 init_mm.brk = (unsigned long)_end; 273 274 #if defined(CONFIG_BOOTPARAM) 275 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); 276 m68k_command_line[CL_SIZE - 1] = 0; 277 #endif /* CONFIG_BOOTPARAM */ 278 process_uboot_commandline(&m68k_command_line[0], CL_SIZE); 279 *cmdline_p = m68k_command_line; 280 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 281 282 parse_early_param(); 283 284 #ifdef CONFIG_DUMMY_CONSOLE 285 conswitchp = &dummy_con; 286 #endif 287 288 switch (m68k_machtype) { 289 #ifdef CONFIG_AMIGA 290 case MACH_AMIGA: 291 config_amiga(); 292 break; 293 #endif 294 #ifdef CONFIG_ATARI 295 case MACH_ATARI: 296 config_atari(); 297 break; 298 #endif 299 #ifdef CONFIG_MAC 300 case MACH_MAC: 301 config_mac(); 302 break; 303 #endif 304 #ifdef CONFIG_SUN3 305 case MACH_SUN3: 306 config_sun3(); 307 break; 308 #endif 309 #ifdef CONFIG_APOLLO 310 case MACH_APOLLO: 311 config_apollo(); 312 break; 313 #endif 314 #ifdef CONFIG_MVME147 315 case MACH_MVME147: 316 config_mvme147(); 317 break; 318 #endif 319 #ifdef CONFIG_MVME16x 320 case MACH_MVME16x: 321 config_mvme16x(); 322 break; 323 #endif 324 #ifdef CONFIG_BVME6000 325 case MACH_BVME6000: 326 config_bvme6000(); 327 break; 328 #endif 329 #ifdef CONFIG_HP300 330 case MACH_HP300: 331 config_hp300(); 332 break; 333 #endif 334 #ifdef CONFIG_Q40 335 case MACH_Q40: 336 config_q40(); 337 break; 338 #endif 339 #ifdef CONFIG_SUN3X 340 case MACH_SUN3X: 341 config_sun3x(); 342 break; 343 #endif 344 #ifdef CONFIG_COLDFIRE 345 case MACH_M54XX: 346 case MACH_M5441X: 347 config_BSP(NULL, 0); 348 break; 349 #endif 350 default: 351 panic("No configuration setup"); 352 } 353 354 paging_init(); 355 356 #ifdef CONFIG_NATFEAT 357 nf_init(); 358 #endif 359 360 #ifndef CONFIG_SUN3 361 for (i = 1; i < m68k_num_memory; i++) 362 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr, 363 m68k_memory[i].size); 364 #ifdef CONFIG_BLK_DEV_INITRD 365 if (m68k_ramdisk.size) { 366 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)), 367 m68k_ramdisk.addr, m68k_ramdisk.size, 368 BOOTMEM_DEFAULT); 369 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 370 initrd_end = initrd_start + m68k_ramdisk.size; 371 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 372 } 373 #endif 374 375 #ifdef CONFIG_ATARI 376 if (MACH_IS_ATARI) 377 atari_stram_reserve_pages((void *)availmem); 378 #endif 379 #ifdef CONFIG_SUN3X 380 if (MACH_IS_SUN3X) { 381 dvma_init(); 382 } 383 #endif 384 385 #endif /* !CONFIG_SUN3 */ 386 387 /* set ISA defs early as possible */ 388 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 389 if (MACH_IS_Q40) { 390 isa_type = ISA_TYPE_Q40; 391 isa_sex = 0; 392 } 393 #ifdef CONFIG_AMIGA_PCMCIA 394 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 395 isa_type = ISA_TYPE_AG; 396 isa_sex = 1; 397 } 398 #endif 399 #ifdef CONFIG_ATARI_ROM_ISA 400 if (MACH_IS_ATARI) { 401 isa_type = ISA_TYPE_ENEC; 402 isa_sex = 0; 403 } 404 #endif 405 #endif 406 } 407 408 static int show_cpuinfo(struct seq_file *m, void *v) 409 { 410 const char *cpu, *mmu, *fpu; 411 unsigned long clockfreq, clockfactor; 412 413 #define LOOP_CYCLES_68020 (8) 414 #define LOOP_CYCLES_68030 (8) 415 #define LOOP_CYCLES_68040 (3) 416 #define LOOP_CYCLES_68060 (1) 417 #define LOOP_CYCLES_COLDFIRE (2) 418 419 if (CPU_IS_020) { 420 cpu = "68020"; 421 clockfactor = LOOP_CYCLES_68020; 422 } else if (CPU_IS_030) { 423 cpu = "68030"; 424 clockfactor = LOOP_CYCLES_68030; 425 } else if (CPU_IS_040) { 426 cpu = "68040"; 427 clockfactor = LOOP_CYCLES_68040; 428 } else if (CPU_IS_060) { 429 cpu = "68060"; 430 clockfactor = LOOP_CYCLES_68060; 431 } else if (CPU_IS_COLDFIRE) { 432 cpu = "ColdFire"; 433 clockfactor = LOOP_CYCLES_COLDFIRE; 434 } else { 435 cpu = "680x0"; 436 clockfactor = 0; 437 } 438 439 #ifdef CONFIG_M68KFPU_EMU_ONLY 440 fpu = "none(soft float)"; 441 #else 442 if (m68k_fputype & FPU_68881) 443 fpu = "68881"; 444 else if (m68k_fputype & FPU_68882) 445 fpu = "68882"; 446 else if (m68k_fputype & FPU_68040) 447 fpu = "68040"; 448 else if (m68k_fputype & FPU_68060) 449 fpu = "68060"; 450 else if (m68k_fputype & FPU_SUNFPA) 451 fpu = "Sun FPA"; 452 else if (m68k_fputype & FPU_COLDFIRE) 453 fpu = "ColdFire"; 454 else 455 fpu = "none"; 456 #endif 457 458 if (m68k_mmutype & MMU_68851) 459 mmu = "68851"; 460 else if (m68k_mmutype & MMU_68030) 461 mmu = "68030"; 462 else if (m68k_mmutype & MMU_68040) 463 mmu = "68040"; 464 else if (m68k_mmutype & MMU_68060) 465 mmu = "68060"; 466 else if (m68k_mmutype & MMU_SUN3) 467 mmu = "Sun-3"; 468 else if (m68k_mmutype & MMU_APOLLO) 469 mmu = "Apollo"; 470 else if (m68k_mmutype & MMU_COLDFIRE) 471 mmu = "ColdFire"; 472 else 473 mmu = "unknown"; 474 475 clockfreq = loops_per_jiffy * HZ * clockfactor; 476 477 seq_printf(m, "CPU:\t\t%s\n" 478 "MMU:\t\t%s\n" 479 "FPU:\t\t%s\n" 480 "Clocking:\t%lu.%1luMHz\n" 481 "BogoMips:\t%lu.%02lu\n" 482 "Calibration:\t%lu loops\n", 483 cpu, mmu, fpu, 484 clockfreq/1000000,(clockfreq/100000)%10, 485 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 486 loops_per_jiffy); 487 return 0; 488 } 489 490 static void *c_start(struct seq_file *m, loff_t *pos) 491 { 492 return *pos < 1 ? (void *)1 : NULL; 493 } 494 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 495 { 496 ++*pos; 497 return NULL; 498 } 499 static void c_stop(struct seq_file *m, void *v) 500 { 501 } 502 const struct seq_operations cpuinfo_op = { 503 .start = c_start, 504 .next = c_next, 505 .stop = c_stop, 506 .show = show_cpuinfo, 507 }; 508 509 #ifdef CONFIG_PROC_HARDWARE 510 static int hardware_proc_show(struct seq_file *m, void *v) 511 { 512 char model[80]; 513 unsigned long mem; 514 int i; 515 516 if (mach_get_model) 517 mach_get_model(model); 518 else 519 strcpy(model, "Unknown m68k"); 520 521 seq_printf(m, "Model:\t\t%s\n", model); 522 for (mem = 0, i = 0; i < m68k_num_memory; i++) 523 mem += m68k_memory[i].size; 524 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 525 526 if (mach_get_hardware_list) 527 mach_get_hardware_list(m); 528 529 return 0; 530 } 531 532 static int hardware_proc_open(struct inode *inode, struct file *file) 533 { 534 return single_open(file, hardware_proc_show, NULL); 535 } 536 537 static const struct file_operations hardware_proc_fops = { 538 .open = hardware_proc_open, 539 .read = seq_read, 540 .llseek = seq_lseek, 541 .release = single_release, 542 }; 543 544 static int __init proc_hardware_init(void) 545 { 546 proc_create("hardware", 0, NULL, &hardware_proc_fops); 547 return 0; 548 } 549 module_init(proc_hardware_init); 550 #endif 551 552 void check_bugs(void) 553 { 554 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU) 555 if (m68k_fputype == 0) { 556 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 557 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 558 pr_emerg("Upgrade your hardware or join the FPU " 559 "emulation project\n"); 560 panic("no FPU"); 561 } 562 #endif /* !CONFIG_M68KFPU_EMU */ 563 } 564 565 #ifdef CONFIG_ADB 566 static int __init adb_probe_sync_enable (char *str) { 567 extern int __adb_probe_sync; 568 __adb_probe_sync = 1; 569 return 1; 570 } 571 572 __setup("adb_sync", adb_probe_sync_enable); 573 #endif /* CONFIG_ADB */ 574