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