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