1 /* 2 * linux/arch/m68k/kernel/setup.c 3 * 4 * Copyright (C) 1995 Hamish Macdonald 5 */ 6 7 /* 8 * This file handles the architecture-dependent parts of system setup 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/mm.h> 13 #include <linux/sched.h> 14 #include <linux/delay.h> 15 #include <linux/interrupt.h> 16 #include <linux/fs.h> 17 #include <linux/console.h> 18 #include <linux/genhd.h> 19 #include <linux/errno.h> 20 #include <linux/string.h> 21 #include <linux/init.h> 22 #include <linux/bootmem.h> 23 #include <linux/proc_fs.h> 24 #include <linux/seq_file.h> 25 #include <linux/module.h> 26 #include <linux/initrd.h> 27 28 #include <asm/bootinfo.h> 29 #include <asm/setup.h> 30 #include <asm/fpu.h> 31 #include <asm/irq.h> 32 #include <asm/io.h> 33 #include <asm/machdep.h> 34 #ifdef CONFIG_AMIGA 35 #include <asm/amigahw.h> 36 #endif 37 #ifdef CONFIG_ATARI 38 #include <asm/atarihw.h> 39 #include <asm/atari_stram.h> 40 #endif 41 #ifdef CONFIG_SUN3X 42 #include <asm/dvma.h> 43 #endif 44 45 #if !FPSTATESIZE || !NR_IRQS 46 #warning No CPU/platform type selected, your kernel will not work! 47 #warning Are you building an allnoconfig kernel? 48 #endif 49 50 unsigned long m68k_machtype; 51 EXPORT_SYMBOL(m68k_machtype); 52 unsigned long m68k_cputype; 53 EXPORT_SYMBOL(m68k_cputype); 54 unsigned long m68k_fputype; 55 unsigned long m68k_mmutype; 56 EXPORT_SYMBOL(m68k_mmutype); 57 #ifdef CONFIG_VME 58 unsigned long vme_brdtype; 59 EXPORT_SYMBOL(vme_brdtype); 60 #endif 61 62 int m68k_is040or060; 63 EXPORT_SYMBOL(m68k_is040or060); 64 65 extern int end; 66 extern unsigned long availmem; 67 68 int m68k_num_memory; 69 EXPORT_SYMBOL(m68k_num_memory); 70 int m68k_realnum_memory; 71 EXPORT_SYMBOL(m68k_realnum_memory); 72 unsigned long m68k_memoffset; 73 struct mem_info m68k_memory[NUM_MEMINFO]; 74 EXPORT_SYMBOL(m68k_memory); 75 76 struct mem_info m68k_ramdisk; 77 78 static char m68k_command_line[CL_SIZE]; 79 80 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL; 81 /* machine dependent irq functions */ 82 void (*mach_init_IRQ) (void) __initdata = NULL; 83 void (*mach_get_model) (char *model); 84 void (*mach_get_hardware_list) (struct seq_file *m); 85 /* machine dependent timer functions */ 86 unsigned long (*mach_gettimeoffset) (void); 87 int (*mach_hwclk) (int, struct rtc_time*); 88 EXPORT_SYMBOL(mach_hwclk); 89 int (*mach_set_clock_mmss) (unsigned long); 90 unsigned int (*mach_get_ss)(void); 91 int (*mach_get_rtc_pll)(struct rtc_pll_info *); 92 int (*mach_set_rtc_pll)(struct rtc_pll_info *); 93 EXPORT_SYMBOL(mach_get_ss); 94 EXPORT_SYMBOL(mach_get_rtc_pll); 95 EXPORT_SYMBOL(mach_set_rtc_pll); 96 void (*mach_reset)( void ); 97 void (*mach_halt)( void ); 98 void (*mach_power_off)( void ); 99 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 100 #ifdef CONFIG_HEARTBEAT 101 void (*mach_heartbeat) (int); 102 EXPORT_SYMBOL(mach_heartbeat); 103 #endif 104 #ifdef CONFIG_M68K_L2_CACHE 105 void (*mach_l2_flush) (int); 106 #endif 107 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) 108 void (*mach_beep)(unsigned int, unsigned int); 109 EXPORT_SYMBOL(mach_beep); 110 #endif 111 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 112 int isa_type; 113 int isa_sex; 114 EXPORT_SYMBOL(isa_type); 115 EXPORT_SYMBOL(isa_sex); 116 #endif 117 118 extern int amiga_parse_bootinfo(const struct bi_record *); 119 extern int atari_parse_bootinfo(const struct bi_record *); 120 extern int mac_parse_bootinfo(const struct bi_record *); 121 extern int q40_parse_bootinfo(const struct bi_record *); 122 extern int bvme6000_parse_bootinfo(const struct bi_record *); 123 extern int mvme16x_parse_bootinfo(const struct bi_record *); 124 extern int mvme147_parse_bootinfo(const struct bi_record *); 125 extern int hp300_parse_bootinfo(const struct bi_record *); 126 extern int apollo_parse_bootinfo(const struct bi_record *); 127 128 extern void config_amiga(void); 129 extern void config_atari(void); 130 extern void config_mac(void); 131 extern void config_sun3(void); 132 extern void config_apollo(void); 133 extern void config_mvme147(void); 134 extern void config_mvme16x(void); 135 extern void config_bvme6000(void); 136 extern void config_hp300(void); 137 extern void config_q40(void); 138 extern void config_sun3x(void); 139 140 #define MASK_256K 0xfffc0000 141 142 extern void paging_init(void); 143 144 static void __init m68k_parse_bootinfo(const struct bi_record *record) 145 { 146 while (record->tag != BI_LAST) { 147 int unknown = 0; 148 const unsigned long *data = record->data; 149 150 switch (record->tag) { 151 case BI_MACHTYPE: 152 case BI_CPUTYPE: 153 case BI_FPUTYPE: 154 case BI_MMUTYPE: 155 /* Already set up by head.S */ 156 break; 157 158 case BI_MEMCHUNK: 159 if (m68k_num_memory < NUM_MEMINFO) { 160 m68k_memory[m68k_num_memory].addr = data[0]; 161 m68k_memory[m68k_num_memory].size = data[1]; 162 m68k_num_memory++; 163 } else 164 printk("m68k_parse_bootinfo: too many memory chunks\n"); 165 break; 166 167 case BI_RAMDISK: 168 m68k_ramdisk.addr = data[0]; 169 m68k_ramdisk.size = data[1]; 170 break; 171 172 case BI_COMMAND_LINE: 173 strlcpy(m68k_command_line, (const char *)data, 174 sizeof(m68k_command_line)); 175 break; 176 177 default: 178 if (MACH_IS_AMIGA) 179 unknown = amiga_parse_bootinfo(record); 180 else if (MACH_IS_ATARI) 181 unknown = atari_parse_bootinfo(record); 182 else if (MACH_IS_MAC) 183 unknown = mac_parse_bootinfo(record); 184 else if (MACH_IS_Q40) 185 unknown = q40_parse_bootinfo(record); 186 else if (MACH_IS_BVME6000) 187 unknown = bvme6000_parse_bootinfo(record); 188 else if (MACH_IS_MVME16x) 189 unknown = mvme16x_parse_bootinfo(record); 190 else if (MACH_IS_MVME147) 191 unknown = mvme147_parse_bootinfo(record); 192 else if (MACH_IS_HP300) 193 unknown = hp300_parse_bootinfo(record); 194 else if (MACH_IS_APOLLO) 195 unknown = apollo_parse_bootinfo(record); 196 else 197 unknown = 1; 198 } 199 if (unknown) 200 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", 201 record->tag); 202 record = (struct bi_record *)((unsigned long)record + 203 record->size); 204 } 205 206 m68k_realnum_memory = m68k_num_memory; 207 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 208 if (m68k_num_memory > 1) { 209 printk("Ignoring last %i chunks of physical memory\n", 210 (m68k_num_memory - 1)); 211 m68k_num_memory = 1; 212 } 213 #endif 214 } 215 216 void __init setup_arch(char **cmdline_p) 217 { 218 extern int _etext, _edata, _end; 219 int i; 220 221 /* The bootinfo is located right after the kernel bss */ 222 m68k_parse_bootinfo((const struct bi_record *)&_end); 223 224 if (CPU_IS_040) 225 m68k_is040or060 = 4; 226 else if (CPU_IS_060) 227 m68k_is040or060 = 6; 228 229 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 230 * be confused by software FPU emulation. BEWARE. 231 * We should really do our own FPU check at startup. 232 * [what do we do with buggy 68LC040s? if we have problems 233 * with them, we should add a test to check_bugs() below] */ 234 #ifndef CONFIG_M68KFPU_EMU_ONLY 235 /* clear the fpu if we have one */ 236 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) { 237 volatile int zero = 0; 238 asm volatile ("frestore %0" : : "m" (zero)); 239 } 240 #endif 241 242 if (CPU_IS_060) { 243 u32 pcr; 244 245 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 246 : "=d" (pcr)); 247 if (((pcr >> 8) & 0xff) <= 5) { 248 printk("Enabling workaround for errata I14\n"); 249 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 250 : : "d" (pcr | 0x20)); 251 } 252 } 253 254 init_mm.start_code = PAGE_OFFSET; 255 init_mm.end_code = (unsigned long) &_etext; 256 init_mm.end_data = (unsigned long) &_edata; 257 init_mm.brk = (unsigned long) &_end; 258 259 *cmdline_p = m68k_command_line; 260 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 261 262 parse_early_param(); 263 264 #ifdef CONFIG_DUMMY_CONSOLE 265 conswitchp = &dummy_con; 266 #endif 267 268 switch (m68k_machtype) { 269 #ifdef CONFIG_AMIGA 270 case MACH_AMIGA: 271 config_amiga(); 272 break; 273 #endif 274 #ifdef CONFIG_ATARI 275 case MACH_ATARI: 276 config_atari(); 277 break; 278 #endif 279 #ifdef CONFIG_MAC 280 case MACH_MAC: 281 config_mac(); 282 break; 283 #endif 284 #ifdef CONFIG_SUN3 285 case MACH_SUN3: 286 config_sun3(); 287 break; 288 #endif 289 #ifdef CONFIG_APOLLO 290 case MACH_APOLLO: 291 config_apollo(); 292 break; 293 #endif 294 #ifdef CONFIG_MVME147 295 case MACH_MVME147: 296 config_mvme147(); 297 break; 298 #endif 299 #ifdef CONFIG_MVME16x 300 case MACH_MVME16x: 301 config_mvme16x(); 302 break; 303 #endif 304 #ifdef CONFIG_BVME6000 305 case MACH_BVME6000: 306 config_bvme6000(); 307 break; 308 #endif 309 #ifdef CONFIG_HP300 310 case MACH_HP300: 311 config_hp300(); 312 break; 313 #endif 314 #ifdef CONFIG_Q40 315 case MACH_Q40: 316 config_q40(); 317 break; 318 #endif 319 #ifdef CONFIG_SUN3X 320 case MACH_SUN3X: 321 config_sun3x(); 322 break; 323 #endif 324 default: 325 panic("No configuration setup"); 326 } 327 328 paging_init(); 329 330 #ifndef CONFIG_SUN3 331 for (i = 1; i < m68k_num_memory; i++) 332 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr, 333 m68k_memory[i].size); 334 #ifdef CONFIG_BLK_DEV_INITRD 335 if (m68k_ramdisk.size) { 336 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)), 337 m68k_ramdisk.addr, m68k_ramdisk.size, 338 BOOTMEM_DEFAULT); 339 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 340 initrd_end = initrd_start + m68k_ramdisk.size; 341 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 342 } 343 #endif 344 345 #ifdef CONFIG_ATARI 346 if (MACH_IS_ATARI) 347 atari_stram_reserve_pages((void *)availmem); 348 #endif 349 #ifdef CONFIG_SUN3X 350 if (MACH_IS_SUN3X) { 351 dvma_init(); 352 } 353 #endif 354 355 #endif /* !CONFIG_SUN3 */ 356 357 /* set ISA defs early as possible */ 358 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 359 if (MACH_IS_Q40) { 360 isa_type = ISA_TYPE_Q40; 361 isa_sex = 0; 362 } 363 #ifdef CONFIG_GG2 364 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) { 365 isa_type = ISA_TYPE_GG2; 366 isa_sex = 0; 367 } 368 #endif 369 #ifdef CONFIG_AMIGA_PCMCIA 370 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 371 isa_type = ISA_TYPE_AG; 372 isa_sex = 1; 373 } 374 #endif 375 #endif 376 } 377 378 static int show_cpuinfo(struct seq_file *m, void *v) 379 { 380 const char *cpu, *mmu, *fpu; 381 unsigned long clockfreq, clockfactor; 382 383 #define LOOP_CYCLES_68020 (8) 384 #define LOOP_CYCLES_68030 (8) 385 #define LOOP_CYCLES_68040 (3) 386 #define LOOP_CYCLES_68060 (1) 387 388 if (CPU_IS_020) { 389 cpu = "68020"; 390 clockfactor = LOOP_CYCLES_68020; 391 } else if (CPU_IS_030) { 392 cpu = "68030"; 393 clockfactor = LOOP_CYCLES_68030; 394 } else if (CPU_IS_040) { 395 cpu = "68040"; 396 clockfactor = LOOP_CYCLES_68040; 397 } else if (CPU_IS_060) { 398 cpu = "68060"; 399 clockfactor = LOOP_CYCLES_68060; 400 } else { 401 cpu = "680x0"; 402 clockfactor = 0; 403 } 404 405 #ifdef CONFIG_M68KFPU_EMU_ONLY 406 fpu = "none(soft float)"; 407 #else 408 if (m68k_fputype & FPU_68881) 409 fpu = "68881"; 410 else if (m68k_fputype & FPU_68882) 411 fpu = "68882"; 412 else if (m68k_fputype & FPU_68040) 413 fpu = "68040"; 414 else if (m68k_fputype & FPU_68060) 415 fpu = "68060"; 416 else if (m68k_fputype & FPU_SUNFPA) 417 fpu = "Sun FPA"; 418 else 419 fpu = "none"; 420 #endif 421 422 if (m68k_mmutype & MMU_68851) 423 mmu = "68851"; 424 else if (m68k_mmutype & MMU_68030) 425 mmu = "68030"; 426 else if (m68k_mmutype & MMU_68040) 427 mmu = "68040"; 428 else if (m68k_mmutype & MMU_68060) 429 mmu = "68060"; 430 else if (m68k_mmutype & MMU_SUN3) 431 mmu = "Sun-3"; 432 else if (m68k_mmutype & MMU_APOLLO) 433 mmu = "Apollo"; 434 else 435 mmu = "unknown"; 436 437 clockfreq = loops_per_jiffy * HZ * clockfactor; 438 439 seq_printf(m, "CPU:\t\t%s\n" 440 "MMU:\t\t%s\n" 441 "FPU:\t\t%s\n" 442 "Clocking:\t%lu.%1luMHz\n" 443 "BogoMips:\t%lu.%02lu\n" 444 "Calibration:\t%lu loops\n", 445 cpu, mmu, fpu, 446 clockfreq/1000000,(clockfreq/100000)%10, 447 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 448 loops_per_jiffy); 449 return 0; 450 } 451 452 static void *c_start(struct seq_file *m, loff_t *pos) 453 { 454 return *pos < 1 ? (void *)1 : NULL; 455 } 456 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 457 { 458 ++*pos; 459 return NULL; 460 } 461 static void c_stop(struct seq_file *m, void *v) 462 { 463 } 464 const struct seq_operations cpuinfo_op = { 465 .start = c_start, 466 .next = c_next, 467 .stop = c_stop, 468 .show = show_cpuinfo, 469 }; 470 471 #ifdef CONFIG_PROC_HARDWARE 472 static int hardware_proc_show(struct seq_file *m, void *v) 473 { 474 char model[80]; 475 unsigned long mem; 476 int i; 477 478 if (mach_get_model) 479 mach_get_model(model); 480 else 481 strcpy(model, "Unknown m68k"); 482 483 seq_printf(m, "Model:\t\t%s\n", model); 484 for (mem = 0, i = 0; i < m68k_num_memory; i++) 485 mem += m68k_memory[i].size; 486 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 487 488 if (mach_get_hardware_list) 489 mach_get_hardware_list(m); 490 491 return 0; 492 } 493 494 static int hardware_proc_open(struct inode *inode, struct file *file) 495 { 496 return single_open(file, hardware_proc_show, NULL); 497 } 498 499 static const struct file_operations hardware_proc_fops = { 500 .open = hardware_proc_open, 501 .read = seq_read, 502 .llseek = seq_lseek, 503 .release = single_release, 504 }; 505 506 static int __init proc_hardware_init(void) 507 { 508 proc_create("hardware", 0, NULL, &hardware_proc_fops); 509 return 0; 510 } 511 module_init(proc_hardware_init); 512 #endif 513 514 void check_bugs(void) 515 { 516 #ifndef CONFIG_M68KFPU_EMU 517 if (m68k_fputype == 0) { 518 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 519 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 520 printk(KERN_EMERG "Upgrade your hardware or join the FPU " 521 "emulation project\n"); 522 panic("no FPU"); 523 } 524 #endif /* !CONFIG_M68KFPU_EMU */ 525 } 526 527 #ifdef CONFIG_ADB 528 static int __init adb_probe_sync_enable (char *str) { 529 extern int __adb_probe_sync; 530 __adb_probe_sync = 1; 531 return 1; 532 } 533 534 __setup("adb_sync", adb_probe_sync_enable); 535 #endif /* CONFIG_ADB */ 536