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/memblock.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 unsigned int (*mach_get_ss)(void); 92 int (*mach_get_rtc_pll)(struct rtc_pll_info *); 93 int (*mach_set_rtc_pll)(struct rtc_pll_info *); 94 EXPORT_SYMBOL(mach_get_ss); 95 EXPORT_SYMBOL(mach_get_rtc_pll); 96 EXPORT_SYMBOL(mach_set_rtc_pll); 97 void (*mach_reset)( void ); 98 void (*mach_halt)( void ); 99 void (*mach_power_off)( void ); 100 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 101 #ifdef CONFIG_HEARTBEAT 102 void (*mach_heartbeat) (int); 103 EXPORT_SYMBOL(mach_heartbeat); 104 #endif 105 #ifdef CONFIG_M68K_L2_CACHE 106 void (*mach_l2_flush) (int); 107 #endif 108 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 109 int isa_type; 110 int isa_sex; 111 EXPORT_SYMBOL(isa_type); 112 EXPORT_SYMBOL(isa_sex); 113 #endif 114 115 extern int amiga_parse_bootinfo(const struct bi_record *); 116 extern int atari_parse_bootinfo(const struct bi_record *); 117 extern int mac_parse_bootinfo(const struct bi_record *); 118 extern int q40_parse_bootinfo(const struct bi_record *); 119 extern int bvme6000_parse_bootinfo(const struct bi_record *); 120 extern int mvme16x_parse_bootinfo(const struct bi_record *); 121 extern int mvme147_parse_bootinfo(const struct bi_record *); 122 extern int hp300_parse_bootinfo(const struct bi_record *); 123 extern int apollo_parse_bootinfo(const struct bi_record *); 124 125 extern void config_amiga(void); 126 extern void config_atari(void); 127 extern void config_mac(void); 128 extern void config_sun3(void); 129 extern void config_apollo(void); 130 extern void config_mvme147(void); 131 extern void config_mvme16x(void); 132 extern void config_bvme6000(void); 133 extern void config_hp300(void); 134 extern void config_q40(void); 135 extern void config_sun3x(void); 136 137 #define MASK_256K 0xfffc0000 138 139 extern void paging_init(void); 140 141 static void __init m68k_parse_bootinfo(const struct bi_record *record) 142 { 143 uint16_t tag; 144 145 save_bootinfo(record); 146 147 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) { 148 int unknown = 0; 149 const void *data = record->data; 150 uint16_t size = be16_to_cpu(record->size); 151 152 switch (tag) { 153 case BI_MACHTYPE: 154 case BI_CPUTYPE: 155 case BI_FPUTYPE: 156 case BI_MMUTYPE: 157 /* Already set up by head.S */ 158 break; 159 160 case BI_MEMCHUNK: 161 if (m68k_num_memory < NUM_MEMINFO) { 162 const struct mem_info *m = data; 163 m68k_memory[m68k_num_memory].addr = 164 be32_to_cpu(m->addr); 165 m68k_memory[m68k_num_memory].size = 166 be32_to_cpu(m->size); 167 m68k_num_memory++; 168 } else 169 pr_warn("%s: too many memory chunks\n", 170 __func__); 171 break; 172 173 case BI_RAMDISK: 174 { 175 const struct mem_info *m = data; 176 m68k_ramdisk.addr = be32_to_cpu(m->addr); 177 m68k_ramdisk.size = be32_to_cpu(m->size); 178 } 179 break; 180 181 case BI_COMMAND_LINE: 182 strlcpy(m68k_command_line, data, 183 sizeof(m68k_command_line)); 184 break; 185 186 default: 187 if (MACH_IS_AMIGA) 188 unknown = amiga_parse_bootinfo(record); 189 else if (MACH_IS_ATARI) 190 unknown = atari_parse_bootinfo(record); 191 else if (MACH_IS_MAC) 192 unknown = mac_parse_bootinfo(record); 193 else if (MACH_IS_Q40) 194 unknown = q40_parse_bootinfo(record); 195 else if (MACH_IS_BVME6000) 196 unknown = bvme6000_parse_bootinfo(record); 197 else if (MACH_IS_MVME16x) 198 unknown = mvme16x_parse_bootinfo(record); 199 else if (MACH_IS_MVME147) 200 unknown = mvme147_parse_bootinfo(record); 201 else if (MACH_IS_HP300) 202 unknown = hp300_parse_bootinfo(record); 203 else if (MACH_IS_APOLLO) 204 unknown = apollo_parse_bootinfo(record); 205 else 206 unknown = 1; 207 } 208 if (unknown) 209 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__, 210 tag); 211 record = (struct bi_record *)((unsigned long)record + size); 212 } 213 214 m68k_realnum_memory = m68k_num_memory; 215 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 216 if (m68k_num_memory > 1) { 217 pr_warn("%s: ignoring last %i chunks of physical memory\n", 218 __func__, (m68k_num_memory - 1)); 219 m68k_num_memory = 1; 220 } 221 #endif 222 } 223 224 void __init setup_arch(char **cmdline_p) 225 { 226 /* The bootinfo is located right after the kernel */ 227 if (!CPU_IS_COLDFIRE) 228 m68k_parse_bootinfo((const struct bi_record *)_end); 229 230 if (CPU_IS_040) 231 m68k_is040or060 = 4; 232 else if (CPU_IS_060) 233 m68k_is040or060 = 6; 234 235 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 236 * be confused by software FPU emulation. BEWARE. 237 * We should really do our own FPU check at startup. 238 * [what do we do with buggy 68LC040s? if we have problems 239 * with them, we should add a test to check_bugs() below] */ 240 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY) 241 /* clear the fpu if we have one */ 242 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) { 243 volatile int zero = 0; 244 asm volatile ("frestore %0" : : "m" (zero)); 245 } 246 #endif 247 248 if (CPU_IS_060) { 249 u32 pcr; 250 251 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 252 : "=d" (pcr)); 253 if (((pcr >> 8) & 0xff) <= 5) { 254 pr_warn("Enabling workaround for errata I14\n"); 255 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 256 : : "d" (pcr | 0x20)); 257 } 258 } 259 260 init_mm.start_code = PAGE_OFFSET; 261 init_mm.end_code = (unsigned long)_etext; 262 init_mm.end_data = (unsigned long)_edata; 263 init_mm.brk = (unsigned long)_end; 264 265 #if defined(CONFIG_BOOTPARAM) 266 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE); 267 m68k_command_line[CL_SIZE - 1] = 0; 268 #endif /* CONFIG_BOOTPARAM */ 269 process_uboot_commandline(&m68k_command_line[0], CL_SIZE); 270 *cmdline_p = m68k_command_line; 271 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 272 273 parse_early_param(); 274 275 #ifdef CONFIG_DUMMY_CONSOLE 276 conswitchp = &dummy_con; 277 #endif 278 279 switch (m68k_machtype) { 280 #ifdef CONFIG_AMIGA 281 case MACH_AMIGA: 282 config_amiga(); 283 break; 284 #endif 285 #ifdef CONFIG_ATARI 286 case MACH_ATARI: 287 config_atari(); 288 break; 289 #endif 290 #ifdef CONFIG_MAC 291 case MACH_MAC: 292 config_mac(); 293 break; 294 #endif 295 #ifdef CONFIG_SUN3 296 case MACH_SUN3: 297 config_sun3(); 298 break; 299 #endif 300 #ifdef CONFIG_APOLLO 301 case MACH_APOLLO: 302 config_apollo(); 303 break; 304 #endif 305 #ifdef CONFIG_MVME147 306 case MACH_MVME147: 307 config_mvme147(); 308 break; 309 #endif 310 #ifdef CONFIG_MVME16x 311 case MACH_MVME16x: 312 config_mvme16x(); 313 break; 314 #endif 315 #ifdef CONFIG_BVME6000 316 case MACH_BVME6000: 317 config_bvme6000(); 318 break; 319 #endif 320 #ifdef CONFIG_HP300 321 case MACH_HP300: 322 config_hp300(); 323 break; 324 #endif 325 #ifdef CONFIG_Q40 326 case MACH_Q40: 327 config_q40(); 328 break; 329 #endif 330 #ifdef CONFIG_SUN3X 331 case MACH_SUN3X: 332 config_sun3x(); 333 break; 334 #endif 335 #ifdef CONFIG_COLDFIRE 336 case MACH_M54XX: 337 case MACH_M5441X: 338 cf_bootmem_alloc(); 339 cf_mmu_context_init(); 340 config_BSP(NULL, 0); 341 break; 342 #endif 343 default: 344 panic("No configuration setup"); 345 } 346 347 paging_init(); 348 349 #ifdef CONFIG_NATFEAT 350 nf_init(); 351 #endif 352 353 #ifndef CONFIG_SUN3 354 #ifdef CONFIG_BLK_DEV_INITRD 355 if (m68k_ramdisk.size) { 356 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size); 357 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 358 initrd_end = initrd_start + m68k_ramdisk.size; 359 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 360 } 361 #endif 362 363 #ifdef CONFIG_ATARI 364 if (MACH_IS_ATARI) 365 atari_stram_reserve_pages((void *)availmem); 366 #endif 367 #ifdef CONFIG_SUN3X 368 if (MACH_IS_SUN3X) { 369 dvma_init(); 370 } 371 #endif 372 373 #endif /* !CONFIG_SUN3 */ 374 375 /* set ISA defs early as possible */ 376 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 377 if (MACH_IS_Q40) { 378 isa_type = ISA_TYPE_Q40; 379 isa_sex = 0; 380 } 381 #ifdef CONFIG_AMIGA_PCMCIA 382 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 383 isa_type = ISA_TYPE_AG; 384 isa_sex = 1; 385 } 386 #endif 387 #ifdef CONFIG_ATARI_ROM_ISA 388 if (MACH_IS_ATARI) { 389 isa_type = ISA_TYPE_ENEC; 390 isa_sex = 0; 391 } 392 #endif 393 #endif 394 } 395 396 static int show_cpuinfo(struct seq_file *m, void *v) 397 { 398 const char *cpu, *mmu, *fpu; 399 unsigned long clockfreq, clockfactor; 400 401 #define LOOP_CYCLES_68020 (8) 402 #define LOOP_CYCLES_68030 (8) 403 #define LOOP_CYCLES_68040 (3) 404 #define LOOP_CYCLES_68060 (1) 405 #define LOOP_CYCLES_COLDFIRE (2) 406 407 if (CPU_IS_020) { 408 cpu = "68020"; 409 clockfactor = LOOP_CYCLES_68020; 410 } else if (CPU_IS_030) { 411 cpu = "68030"; 412 clockfactor = LOOP_CYCLES_68030; 413 } else if (CPU_IS_040) { 414 cpu = "68040"; 415 clockfactor = LOOP_CYCLES_68040; 416 } else if (CPU_IS_060) { 417 cpu = "68060"; 418 clockfactor = LOOP_CYCLES_68060; 419 } else if (CPU_IS_COLDFIRE) { 420 cpu = "ColdFire"; 421 clockfactor = LOOP_CYCLES_COLDFIRE; 422 } else { 423 cpu = "680x0"; 424 clockfactor = 0; 425 } 426 427 #ifdef CONFIG_M68KFPU_EMU_ONLY 428 fpu = "none(soft float)"; 429 #else 430 if (m68k_fputype & FPU_68881) 431 fpu = "68881"; 432 else if (m68k_fputype & FPU_68882) 433 fpu = "68882"; 434 else if (m68k_fputype & FPU_68040) 435 fpu = "68040"; 436 else if (m68k_fputype & FPU_68060) 437 fpu = "68060"; 438 else if (m68k_fputype & FPU_SUNFPA) 439 fpu = "Sun FPA"; 440 else if (m68k_fputype & FPU_COLDFIRE) 441 fpu = "ColdFire"; 442 else 443 fpu = "none"; 444 #endif 445 446 if (m68k_mmutype & MMU_68851) 447 mmu = "68851"; 448 else if (m68k_mmutype & MMU_68030) 449 mmu = "68030"; 450 else if (m68k_mmutype & MMU_68040) 451 mmu = "68040"; 452 else if (m68k_mmutype & MMU_68060) 453 mmu = "68060"; 454 else if (m68k_mmutype & MMU_SUN3) 455 mmu = "Sun-3"; 456 else if (m68k_mmutype & MMU_APOLLO) 457 mmu = "Apollo"; 458 else if (m68k_mmutype & MMU_COLDFIRE) 459 mmu = "ColdFire"; 460 else 461 mmu = "unknown"; 462 463 clockfreq = loops_per_jiffy * HZ * clockfactor; 464 465 seq_printf(m, "CPU:\t\t%s\n" 466 "MMU:\t\t%s\n" 467 "FPU:\t\t%s\n" 468 "Clocking:\t%lu.%1luMHz\n" 469 "BogoMips:\t%lu.%02lu\n" 470 "Calibration:\t%lu loops\n", 471 cpu, mmu, fpu, 472 clockfreq/1000000,(clockfreq/100000)%10, 473 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 474 loops_per_jiffy); 475 return 0; 476 } 477 478 static void *c_start(struct seq_file *m, loff_t *pos) 479 { 480 return *pos < 1 ? (void *)1 : NULL; 481 } 482 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 483 { 484 ++*pos; 485 return NULL; 486 } 487 static void c_stop(struct seq_file *m, void *v) 488 { 489 } 490 const struct seq_operations cpuinfo_op = { 491 .start = c_start, 492 .next = c_next, 493 .stop = c_stop, 494 .show = show_cpuinfo, 495 }; 496 497 #ifdef CONFIG_PROC_HARDWARE 498 static int hardware_proc_show(struct seq_file *m, void *v) 499 { 500 char model[80]; 501 unsigned long mem; 502 int i; 503 504 if (mach_get_model) 505 mach_get_model(model); 506 else 507 strcpy(model, "Unknown m68k"); 508 509 seq_printf(m, "Model:\t\t%s\n", model); 510 for (mem = 0, i = 0; i < m68k_num_memory; i++) 511 mem += m68k_memory[i].size; 512 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 513 514 if (mach_get_hardware_list) 515 mach_get_hardware_list(m); 516 517 return 0; 518 } 519 520 static int __init proc_hardware_init(void) 521 { 522 proc_create_single("hardware", 0, NULL, hardware_proc_show); 523 return 0; 524 } 525 module_init(proc_hardware_init); 526 #endif 527 528 void check_bugs(void) 529 { 530 #if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU) 531 if (m68k_fputype == 0) { 532 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 533 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 534 pr_emerg("Upgrade your hardware or join the FPU " 535 "emulation project\n"); 536 panic("no FPU"); 537 } 538 #endif /* !CONFIG_M68KFPU_EMU */ 539 } 540 541 #ifdef CONFIG_ADB 542 static int __init adb_probe_sync_enable (char *str) { 543 extern int __adb_probe_sync; 544 __adb_probe_sync = 1; 545 return 1; 546 } 547 548 __setup("adb_sync", adb_probe_sync_enable); 549 #endif /* CONFIG_ADB */ 550