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/memblock.h> 25 #include <linux/proc_fs.h> 26 #include <linux/seq_file.h> 27 #include <linux/module.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 #ifdef CONFIG_ATARI 42 #include <asm/atarihw.h> 43 #include <asm/atari_stram.h> 44 #endif 45 #ifdef CONFIG_SUN3X 46 #include <asm/dvma.h> 47 #endif 48 #include <asm/natfeat.h> 49 50 #if !FPSTATESIZE || !NR_IRQS 51 #warning No CPU/platform type selected, your kernel will not work! 52 #warning Are you building an allnoconfig kernel? 53 #endif 54 55 unsigned long m68k_machtype; 56 EXPORT_SYMBOL(m68k_machtype); 57 unsigned long m68k_cputype; 58 EXPORT_SYMBOL(m68k_cputype); 59 unsigned long m68k_fputype; 60 unsigned long m68k_mmutype; 61 EXPORT_SYMBOL(m68k_mmutype); 62 #ifdef CONFIG_VME 63 unsigned long vme_brdtype; 64 EXPORT_SYMBOL(vme_brdtype); 65 #endif 66 67 int m68k_is040or060; 68 EXPORT_SYMBOL(m68k_is040or060); 69 70 extern unsigned long availmem; 71 72 int m68k_num_memory; 73 EXPORT_SYMBOL(m68k_num_memory); 74 int m68k_realnum_memory; 75 EXPORT_SYMBOL(m68k_realnum_memory); 76 unsigned long m68k_memoffset; 77 struct m68k_mem_info m68k_memory[NUM_MEMINFO]; 78 EXPORT_SYMBOL(m68k_memory); 79 80 static struct m68k_mem_info m68k_ramdisk __initdata; 81 82 static char m68k_command_line[CL_SIZE] __initdata; 83 84 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL; 85 /* machine dependent irq functions */ 86 void (*mach_init_IRQ) (void) __initdata = NULL; 87 void (*mach_get_model) (char *model); 88 void (*mach_get_hardware_list) (struct seq_file *m); 89 /* machine dependent timer functions */ 90 int (*mach_hwclk) (int, struct rtc_time*); 91 EXPORT_SYMBOL(mach_hwclk); 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 memblock_add(m68k_memory[m68k_num_memory].addr, 169 m68k_memory[m68k_num_memory].size); 170 m68k_num_memory++; 171 } else 172 pr_warn("%s: too many memory chunks\n", 173 __func__); 174 break; 175 176 case BI_RAMDISK: 177 { 178 const struct mem_info *m = data; 179 m68k_ramdisk.addr = be32_to_cpu(m->addr); 180 m68k_ramdisk.size = be32_to_cpu(m->size); 181 } 182 break; 183 184 case BI_COMMAND_LINE: 185 strlcpy(m68k_command_line, data, 186 sizeof(m68k_command_line)); 187 break; 188 189 default: 190 if (MACH_IS_AMIGA) 191 unknown = amiga_parse_bootinfo(record); 192 else if (MACH_IS_ATARI) 193 unknown = atari_parse_bootinfo(record); 194 else if (MACH_IS_MAC) 195 unknown = mac_parse_bootinfo(record); 196 else if (MACH_IS_Q40) 197 unknown = q40_parse_bootinfo(record); 198 else if (MACH_IS_BVME6000) 199 unknown = bvme6000_parse_bootinfo(record); 200 else if (MACH_IS_MVME16x) 201 unknown = mvme16x_parse_bootinfo(record); 202 else if (MACH_IS_MVME147) 203 unknown = mvme147_parse_bootinfo(record); 204 else if (MACH_IS_HP300) 205 unknown = hp300_parse_bootinfo(record); 206 else if (MACH_IS_APOLLO) 207 unknown = apollo_parse_bootinfo(record); 208 else 209 unknown = 1; 210 } 211 if (unknown) 212 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__, 213 tag); 214 record = (struct bi_record *)((unsigned long)record + size); 215 } 216 217 m68k_realnum_memory = m68k_num_memory; 218 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 219 if (m68k_num_memory > 1) { 220 pr_warn("%s: ignoring last %i chunks of physical memory\n", 221 __func__, (m68k_num_memory - 1)); 222 m68k_num_memory = 1; 223 } 224 #endif 225 } 226 227 void __init setup_arch(char **cmdline_p) 228 { 229 /* The bootinfo is located right after the kernel */ 230 if (!CPU_IS_COLDFIRE) 231 m68k_parse_bootinfo((const struct bi_record *)_end); 232 233 if (CPU_IS_040) 234 m68k_is040or060 = 4; 235 else if (CPU_IS_060) 236 m68k_is040or060 = 6; 237 238 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 239 * be confused by software FPU emulation. BEWARE. 240 * We should really do our own FPU check at startup. 241 * [what do we do with buggy 68LC040s? if we have problems 242 * with them, we should add a test to check_bugs() below] */ 243 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY) 244 /* clear the fpu if we have one */ 245 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) { 246 volatile int zero = 0; 247 asm volatile ("frestore %0" : : "m" (zero)); 248 } 249 #endif 250 251 if (CPU_IS_060) { 252 u32 pcr; 253 254 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 255 : "=d" (pcr)); 256 if (((pcr >> 8) & 0xff) <= 5) { 257 pr_warn("Enabling workaround for errata I14\n"); 258 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 259 : : "d" (pcr | 0x20)); 260 } 261 } 262 263 init_mm.start_code = PAGE_OFFSET; 264 init_mm.end_code = (unsigned long)_etext; 265 init_mm.end_data = (unsigned long)_edata; 266 init_mm.brk = (unsigned long)_end; 267 268 #if defined(CONFIG_BOOTPARAM) 269 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); 270 m68k_command_line[CL_SIZE - 1] = 0; 271 #endif /* CONFIG_BOOTPARAM */ 272 process_uboot_commandline(&m68k_command_line[0], CL_SIZE); 273 *cmdline_p = m68k_command_line; 274 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 275 276 parse_early_param(); 277 278 #ifdef CONFIG_DUMMY_CONSOLE 279 conswitchp = &dummy_con; 280 #endif 281 282 switch (m68k_machtype) { 283 #ifdef CONFIG_AMIGA 284 case MACH_AMIGA: 285 config_amiga(); 286 break; 287 #endif 288 #ifdef CONFIG_ATARI 289 case MACH_ATARI: 290 config_atari(); 291 break; 292 #endif 293 #ifdef CONFIG_MAC 294 case MACH_MAC: 295 config_mac(); 296 break; 297 #endif 298 #ifdef CONFIG_SUN3 299 case MACH_SUN3: 300 config_sun3(); 301 break; 302 #endif 303 #ifdef CONFIG_APOLLO 304 case MACH_APOLLO: 305 config_apollo(); 306 break; 307 #endif 308 #ifdef CONFIG_MVME147 309 case MACH_MVME147: 310 config_mvme147(); 311 break; 312 #endif 313 #ifdef CONFIG_MVME16x 314 case MACH_MVME16x: 315 config_mvme16x(); 316 break; 317 #endif 318 #ifdef CONFIG_BVME6000 319 case MACH_BVME6000: 320 config_bvme6000(); 321 break; 322 #endif 323 #ifdef CONFIG_HP300 324 case MACH_HP300: 325 config_hp300(); 326 break; 327 #endif 328 #ifdef CONFIG_Q40 329 case MACH_Q40: 330 config_q40(); 331 break; 332 #endif 333 #ifdef CONFIG_SUN3X 334 case MACH_SUN3X: 335 config_sun3x(); 336 break; 337 #endif 338 #ifdef CONFIG_COLDFIRE 339 case MACH_M54XX: 340 case MACH_M5441X: 341 cf_bootmem_alloc(); 342 cf_mmu_context_init(); 343 config_BSP(NULL, 0); 344 break; 345 #endif 346 default: 347 panic("No configuration setup"); 348 } 349 350 paging_init(); 351 352 #ifdef CONFIG_NATFEAT 353 nf_init(); 354 #endif 355 356 #ifndef CONFIG_SUN3 357 #ifdef CONFIG_BLK_DEV_INITRD 358 if (m68k_ramdisk.size) { 359 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size); 360 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 361 initrd_end = initrd_start + m68k_ramdisk.size; 362 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 363 } 364 #endif 365 366 #ifdef CONFIG_ATARI 367 if (MACH_IS_ATARI) 368 atari_stram_reserve_pages((void *)availmem); 369 #endif 370 #ifdef CONFIG_SUN3X 371 if (MACH_IS_SUN3X) { 372 dvma_init(); 373 } 374 #endif 375 376 #endif /* !CONFIG_SUN3 */ 377 378 /* set ISA defs early as possible */ 379 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 380 if (MACH_IS_Q40) { 381 isa_type = ISA_TYPE_Q40; 382 isa_sex = 0; 383 } 384 #ifdef CONFIG_AMIGA_PCMCIA 385 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 386 isa_type = ISA_TYPE_AG; 387 isa_sex = 1; 388 } 389 #endif 390 #ifdef CONFIG_ATARI_ROM_ISA 391 if (MACH_IS_ATARI) { 392 isa_type = ISA_TYPE_ENEC; 393 isa_sex = 0; 394 } 395 #endif 396 #endif 397 } 398 399 static int show_cpuinfo(struct seq_file *m, void *v) 400 { 401 const char *cpu, *mmu, *fpu; 402 unsigned long clockfreq, clockfactor; 403 404 #define LOOP_CYCLES_68020 (8) 405 #define LOOP_CYCLES_68030 (8) 406 #define LOOP_CYCLES_68040 (3) 407 #define LOOP_CYCLES_68060 (1) 408 #define LOOP_CYCLES_COLDFIRE (2) 409 410 if (CPU_IS_020) { 411 cpu = "68020"; 412 clockfactor = LOOP_CYCLES_68020; 413 } else if (CPU_IS_030) { 414 cpu = "68030"; 415 clockfactor = LOOP_CYCLES_68030; 416 } else if (CPU_IS_040) { 417 cpu = "68040"; 418 clockfactor = LOOP_CYCLES_68040; 419 } else if (CPU_IS_060) { 420 cpu = "68060"; 421 clockfactor = LOOP_CYCLES_68060; 422 } else if (CPU_IS_COLDFIRE) { 423 cpu = "ColdFire"; 424 clockfactor = LOOP_CYCLES_COLDFIRE; 425 } else { 426 cpu = "680x0"; 427 clockfactor = 0; 428 } 429 430 #ifdef CONFIG_M68KFPU_EMU_ONLY 431 fpu = "none(soft float)"; 432 #else 433 if (m68k_fputype & FPU_68881) 434 fpu = "68881"; 435 else if (m68k_fputype & FPU_68882) 436 fpu = "68882"; 437 else if (m68k_fputype & FPU_68040) 438 fpu = "68040"; 439 else if (m68k_fputype & FPU_68060) 440 fpu = "68060"; 441 else if (m68k_fputype & FPU_SUNFPA) 442 fpu = "Sun FPA"; 443 else if (m68k_fputype & FPU_COLDFIRE) 444 fpu = "ColdFire"; 445 else 446 fpu = "none"; 447 #endif 448 449 if (m68k_mmutype & MMU_68851) 450 mmu = "68851"; 451 else if (m68k_mmutype & MMU_68030) 452 mmu = "68030"; 453 else if (m68k_mmutype & MMU_68040) 454 mmu = "68040"; 455 else if (m68k_mmutype & MMU_68060) 456 mmu = "68060"; 457 else if (m68k_mmutype & MMU_SUN3) 458 mmu = "Sun-3"; 459 else if (m68k_mmutype & MMU_APOLLO) 460 mmu = "Apollo"; 461 else if (m68k_mmutype & MMU_COLDFIRE) 462 mmu = "ColdFire"; 463 else 464 mmu = "unknown"; 465 466 clockfreq = loops_per_jiffy * HZ * clockfactor; 467 468 seq_printf(m, "CPU:\t\t%s\n" 469 "MMU:\t\t%s\n" 470 "FPU:\t\t%s\n" 471 "Clocking:\t%lu.%1luMHz\n" 472 "BogoMips:\t%lu.%02lu\n" 473 "Calibration:\t%lu loops\n", 474 cpu, mmu, fpu, 475 clockfreq/1000000,(clockfreq/100000)%10, 476 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 477 loops_per_jiffy); 478 return 0; 479 } 480 481 static void *c_start(struct seq_file *m, loff_t *pos) 482 { 483 return *pos < 1 ? (void *)1 : NULL; 484 } 485 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 486 { 487 ++*pos; 488 return NULL; 489 } 490 static void c_stop(struct seq_file *m, void *v) 491 { 492 } 493 const struct seq_operations cpuinfo_op = { 494 .start = c_start, 495 .next = c_next, 496 .stop = c_stop, 497 .show = show_cpuinfo, 498 }; 499 500 #ifdef CONFIG_PROC_HARDWARE 501 static int hardware_proc_show(struct seq_file *m, void *v) 502 { 503 char model[80]; 504 unsigned long mem; 505 int i; 506 507 if (mach_get_model) 508 mach_get_model(model); 509 else 510 strcpy(model, "Unknown m68k"); 511 512 seq_printf(m, "Model:\t\t%s\n", model); 513 for (mem = 0, i = 0; i < m68k_num_memory; i++) 514 mem += m68k_memory[i].size; 515 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 516 517 if (mach_get_hardware_list) 518 mach_get_hardware_list(m); 519 520 return 0; 521 } 522 523 static int __init proc_hardware_init(void) 524 { 525 proc_create_single("hardware", 0, NULL, hardware_proc_show); 526 return 0; 527 } 528 module_init(proc_hardware_init); 529 #endif 530 531 void check_bugs(void) 532 { 533 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU) 534 if (m68k_fputype == 0) { 535 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 536 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 537 pr_emerg("Upgrade your hardware or join the FPU " 538 "emulation project\n"); 539 panic("no FPU"); 540 } 541 #endif /* !CONFIG_M68KFPU_EMU */ 542 } 543 544 #ifdef CONFIG_ADB 545 static int __init adb_probe_sync_enable (char *str) { 546 extern int __adb_probe_sync; 547 __adb_probe_sync = 1; 548 return 1; 549 } 550 551 __setup("adb_sync", adb_probe_sync_enable); 552 #endif /* CONFIG_ADB */ 553