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/irq.h> 30 #include <asm/io.h> 31 #include <asm/machdep.h> 32 #ifdef CONFIG_AMIGA 33 #include <asm/amigahw.h> 34 #endif 35 #ifdef CONFIG_ATARI 36 #include <asm/atarihw.h> 37 #include <asm/atari_stram.h> 38 #endif 39 #ifdef CONFIG_SUN3X 40 #include <asm/dvma.h> 41 #endif 42 43 unsigned long m68k_machtype; 44 unsigned long m68k_cputype; 45 EXPORT_SYMBOL(m68k_machtype); 46 EXPORT_SYMBOL(m68k_cputype); 47 unsigned long m68k_fputype; 48 unsigned long m68k_mmutype; 49 #ifdef CONFIG_VME 50 unsigned long vme_brdtype; 51 EXPORT_SYMBOL(vme_brdtype); 52 #endif 53 54 int m68k_is040or060; 55 EXPORT_SYMBOL(m68k_is040or060); 56 57 extern int end; 58 extern unsigned long availmem; 59 60 int m68k_num_memory; 61 int m68k_realnum_memory; 62 EXPORT_SYMBOL(m68k_realnum_memory); 63 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 64 unsigned long m68k_memoffset; 65 EXPORT_SYMBOL(m68k_memoffset); 66 #endif 67 struct mem_info m68k_memory[NUM_MEMINFO]; 68 EXPORT_SYMBOL(m68k_memory); 69 70 static struct mem_info m68k_ramdisk; 71 72 static char m68k_command_line[CL_SIZE]; 73 74 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL; 75 /* machine dependent irq functions */ 76 void (*mach_init_IRQ) (void) __initdata = NULL; 77 void (*mach_get_model) (char *model); 78 int (*mach_get_hardware_list) (char *buffer); 79 /* machine dependent timer functions */ 80 unsigned long (*mach_gettimeoffset) (void); 81 int (*mach_hwclk) (int, struct rtc_time*); 82 EXPORT_SYMBOL(mach_hwclk); 83 int (*mach_set_clock_mmss) (unsigned long); 84 unsigned int (*mach_get_ss)(void); 85 int (*mach_get_rtc_pll)(struct rtc_pll_info *); 86 int (*mach_set_rtc_pll)(struct rtc_pll_info *); 87 EXPORT_SYMBOL(mach_get_ss); 88 EXPORT_SYMBOL(mach_get_rtc_pll); 89 EXPORT_SYMBOL(mach_set_rtc_pll); 90 void (*mach_reset)( void ); 91 void (*mach_halt)( void ); 92 void (*mach_power_off)( void ); 93 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 94 #ifdef CONFIG_HEARTBEAT 95 void (*mach_heartbeat) (int); 96 EXPORT_SYMBOL(mach_heartbeat); 97 #endif 98 #ifdef CONFIG_M68K_L2_CACHE 99 void (*mach_l2_flush) (int); 100 #endif 101 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) 102 void (*mach_beep)(unsigned int, unsigned int); 103 EXPORT_SYMBOL(mach_beep); 104 #endif 105 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 106 int isa_type; 107 int isa_sex; 108 EXPORT_SYMBOL(isa_type); 109 EXPORT_SYMBOL(isa_sex); 110 #endif 111 112 extern int amiga_parse_bootinfo(const struct bi_record *); 113 extern int atari_parse_bootinfo(const struct bi_record *); 114 extern int mac_parse_bootinfo(const struct bi_record *); 115 extern int q40_parse_bootinfo(const struct bi_record *); 116 extern int bvme6000_parse_bootinfo(const struct bi_record *); 117 extern int mvme16x_parse_bootinfo(const struct bi_record *); 118 extern int mvme147_parse_bootinfo(const struct bi_record *); 119 extern int hp300_parse_bootinfo(const struct bi_record *); 120 121 extern void config_amiga(void); 122 extern void config_atari(void); 123 extern void config_mac(void); 124 extern void config_sun3(void); 125 extern void config_apollo(void); 126 extern void config_mvme147(void); 127 extern void config_mvme16x(void); 128 extern void config_bvme6000(void); 129 extern void config_hp300(void); 130 extern void config_q40(void); 131 extern void config_sun3x(void); 132 133 #define MASK_256K 0xfffc0000 134 135 extern void paging_init(void); 136 137 static void __init m68k_parse_bootinfo(const struct bi_record *record) 138 { 139 while (record->tag != BI_LAST) { 140 int unknown = 0; 141 const unsigned long *data = record->data; 142 143 switch (record->tag) { 144 case BI_MACHTYPE: 145 case BI_CPUTYPE: 146 case BI_FPUTYPE: 147 case BI_MMUTYPE: 148 /* Already set up by head.S */ 149 break; 150 151 case BI_MEMCHUNK: 152 if (m68k_num_memory < NUM_MEMINFO) { 153 m68k_memory[m68k_num_memory].addr = data[0]; 154 m68k_memory[m68k_num_memory].size = data[1]; 155 m68k_num_memory++; 156 } else 157 printk("m68k_parse_bootinfo: too many memory chunks\n"); 158 break; 159 160 case BI_RAMDISK: 161 m68k_ramdisk.addr = data[0]; 162 m68k_ramdisk.size = data[1]; 163 break; 164 165 case BI_COMMAND_LINE: 166 strlcpy(m68k_command_line, (const char *)data, 167 sizeof(m68k_command_line)); 168 break; 169 170 default: 171 if (MACH_IS_AMIGA) 172 unknown = amiga_parse_bootinfo(record); 173 else if (MACH_IS_ATARI) 174 unknown = atari_parse_bootinfo(record); 175 else if (MACH_IS_MAC) 176 unknown = mac_parse_bootinfo(record); 177 else if (MACH_IS_Q40) 178 unknown = q40_parse_bootinfo(record); 179 else if (MACH_IS_BVME6000) 180 unknown = bvme6000_parse_bootinfo(record); 181 else if (MACH_IS_MVME16x) 182 unknown = mvme16x_parse_bootinfo(record); 183 else if (MACH_IS_MVME147) 184 unknown = mvme147_parse_bootinfo(record); 185 else if (MACH_IS_HP300) 186 unknown = hp300_parse_bootinfo(record); 187 else 188 unknown = 1; 189 } 190 if (unknown) 191 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", 192 record->tag); 193 record = (struct bi_record *)((unsigned long)record + 194 record->size); 195 } 196 197 m68k_realnum_memory = m68k_num_memory; 198 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 199 if (m68k_num_memory > 1) { 200 printk("Ignoring last %i chunks of physical memory\n", 201 (m68k_num_memory - 1)); 202 m68k_num_memory = 1; 203 } 204 m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET; 205 #endif 206 } 207 208 void __init setup_arch(char **cmdline_p) 209 { 210 extern int _etext, _edata, _end; 211 #ifndef CONFIG_SUN3 212 unsigned long endmem, startmem; 213 #endif 214 int i; 215 216 /* The bootinfo is located right after the kernel bss */ 217 m68k_parse_bootinfo((const struct bi_record *)&_end); 218 219 if (CPU_IS_040) 220 m68k_is040or060 = 4; 221 else if (CPU_IS_060) 222 m68k_is040or060 = 6; 223 224 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 225 * be confused by software FPU emulation. BEWARE. 226 * We should really do our own FPU check at startup. 227 * [what do we do with buggy 68LC040s? if we have problems 228 * with them, we should add a test to check_bugs() below] */ 229 #ifndef CONFIG_M68KFPU_EMU_ONLY 230 /* clear the fpu if we have one */ 231 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) { 232 volatile int zero = 0; 233 asm volatile ("frestore %0" : : "m" (zero)); 234 } 235 #endif 236 237 if (CPU_IS_060) { 238 u32 pcr; 239 240 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 241 : "=d" (pcr)); 242 if (((pcr >> 8) & 0xff) <= 5) { 243 printk("Enabling workaround for errata I14\n"); 244 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 245 : : "d" (pcr | 0x20)); 246 } 247 } 248 249 init_mm.start_code = PAGE_OFFSET; 250 init_mm.end_code = (unsigned long) &_etext; 251 init_mm.end_data = (unsigned long) &_edata; 252 init_mm.brk = (unsigned long) &_end; 253 254 *cmdline_p = m68k_command_line; 255 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 256 257 parse_early_param(); 258 259 #ifdef CONFIG_DUMMY_CONSOLE 260 conswitchp = &dummy_con; 261 #endif 262 263 switch (m68k_machtype) { 264 #ifdef CONFIG_AMIGA 265 case MACH_AMIGA: 266 config_amiga(); 267 break; 268 #endif 269 #ifdef CONFIG_ATARI 270 case MACH_ATARI: 271 config_atari(); 272 break; 273 #endif 274 #ifdef CONFIG_MAC 275 case MACH_MAC: 276 config_mac(); 277 break; 278 #endif 279 #ifdef CONFIG_SUN3 280 case MACH_SUN3: 281 config_sun3(); 282 break; 283 #endif 284 #ifdef CONFIG_APOLLO 285 case MACH_APOLLO: 286 config_apollo(); 287 break; 288 #endif 289 #ifdef CONFIG_MVME147 290 case MACH_MVME147: 291 config_mvme147(); 292 break; 293 #endif 294 #ifdef CONFIG_MVME16x 295 case MACH_MVME16x: 296 config_mvme16x(); 297 break; 298 #endif 299 #ifdef CONFIG_BVME6000 300 case MACH_BVME6000: 301 config_bvme6000(); 302 break; 303 #endif 304 #ifdef CONFIG_HP300 305 case MACH_HP300: 306 config_hp300(); 307 break; 308 #endif 309 #ifdef CONFIG_Q40 310 case MACH_Q40: 311 config_q40(); 312 break; 313 #endif 314 #ifdef CONFIG_SUN3X 315 case MACH_SUN3X: 316 config_sun3x(); 317 break; 318 #endif 319 default: 320 panic("No configuration setup"); 321 } 322 323 #ifndef CONFIG_SUN3 324 startmem= m68k_memory[0].addr; 325 endmem = startmem + m68k_memory[0].size; 326 high_memory = (void *)PAGE_OFFSET; 327 for (i = 0; i < m68k_num_memory; i++) { 328 m68k_memory[i].size &= MASK_256K; 329 if (m68k_memory[i].addr < startmem) 330 startmem = m68k_memory[i].addr; 331 if (m68k_memory[i].addr+m68k_memory[i].size > endmem) 332 endmem = m68k_memory[i].addr+m68k_memory[i].size; 333 high_memory += m68k_memory[i].size; 334 } 335 336 availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT, 337 startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT); 338 339 for (i = 0; i < m68k_num_memory; i++) 340 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size); 341 342 reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr); 343 344 #ifdef CONFIG_BLK_DEV_INITRD 345 if (m68k_ramdisk.size) { 346 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size); 347 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 348 initrd_end = initrd_start + m68k_ramdisk.size; 349 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 350 } 351 #endif 352 353 #ifdef CONFIG_ATARI 354 if (MACH_IS_ATARI) 355 atari_stram_reserve_pages((void *)availmem); 356 #endif 357 #ifdef CONFIG_SUN3X 358 if (MACH_IS_SUN3X) { 359 dvma_init(); 360 } 361 #endif 362 363 #endif /* !CONFIG_SUN3 */ 364 365 paging_init(); 366 367 /* set ISA defs early as possible */ 368 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 369 #if defined(CONFIG_Q40) 370 if (MACH_IS_Q40) { 371 isa_type = Q40_ISA; 372 isa_sex = 0; 373 } 374 #elif defined(CONFIG_GG2) 375 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) { 376 isa_type = GG2_ISA; 377 isa_sex = 0; 378 } 379 #elif defined(CONFIG_AMIGA_PCMCIA) 380 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 381 isa_type = AG_ISA; 382 isa_sex = 1; 383 } 384 #endif 385 #endif 386 } 387 388 static int show_cpuinfo(struct seq_file *m, void *v) 389 { 390 const char *cpu, *mmu, *fpu; 391 unsigned long clockfreq, clockfactor; 392 393 #define LOOP_CYCLES_68020 (8) 394 #define LOOP_CYCLES_68030 (8) 395 #define LOOP_CYCLES_68040 (3) 396 #define LOOP_CYCLES_68060 (1) 397 398 if (CPU_IS_020) { 399 cpu = "68020"; 400 clockfactor = LOOP_CYCLES_68020; 401 } else if (CPU_IS_030) { 402 cpu = "68030"; 403 clockfactor = LOOP_CYCLES_68030; 404 } else if (CPU_IS_040) { 405 cpu = "68040"; 406 clockfactor = LOOP_CYCLES_68040; 407 } else if (CPU_IS_060) { 408 cpu = "68060"; 409 clockfactor = LOOP_CYCLES_68060; 410 } else { 411 cpu = "680x0"; 412 clockfactor = 0; 413 } 414 415 #ifdef CONFIG_M68KFPU_EMU_ONLY 416 fpu = "none(soft float)"; 417 #else 418 if (m68k_fputype & FPU_68881) 419 fpu = "68881"; 420 else if (m68k_fputype & FPU_68882) 421 fpu = "68882"; 422 else if (m68k_fputype & FPU_68040) 423 fpu = "68040"; 424 else if (m68k_fputype & FPU_68060) 425 fpu = "68060"; 426 else if (m68k_fputype & FPU_SUNFPA) 427 fpu = "Sun FPA"; 428 else 429 fpu = "none"; 430 #endif 431 432 if (m68k_mmutype & MMU_68851) 433 mmu = "68851"; 434 else if (m68k_mmutype & MMU_68030) 435 mmu = "68030"; 436 else if (m68k_mmutype & MMU_68040) 437 mmu = "68040"; 438 else if (m68k_mmutype & MMU_68060) 439 mmu = "68060"; 440 else if (m68k_mmutype & MMU_SUN3) 441 mmu = "Sun-3"; 442 else if (m68k_mmutype & MMU_APOLLO) 443 mmu = "Apollo"; 444 else 445 mmu = "unknown"; 446 447 clockfreq = loops_per_jiffy * HZ * clockfactor; 448 449 seq_printf(m, "CPU:\t\t%s\n" 450 "MMU:\t\t%s\n" 451 "FPU:\t\t%s\n" 452 "Clocking:\t%lu.%1luMHz\n" 453 "BogoMips:\t%lu.%02lu\n" 454 "Calibration:\t%lu loops\n", 455 cpu, mmu, fpu, 456 clockfreq/1000000,(clockfreq/100000)%10, 457 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 458 loops_per_jiffy); 459 return 0; 460 } 461 462 static void *c_start(struct seq_file *m, loff_t *pos) 463 { 464 return *pos < 1 ? (void *)1 : NULL; 465 } 466 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 467 { 468 ++*pos; 469 return NULL; 470 } 471 static void c_stop(struct seq_file *m, void *v) 472 { 473 } 474 struct seq_operations cpuinfo_op = { 475 .start = c_start, 476 .next = c_next, 477 .stop = c_stop, 478 .show = show_cpuinfo, 479 }; 480 481 int get_hardware_list(char *buffer) 482 { 483 int len = 0; 484 char model[80]; 485 unsigned long mem; 486 int i; 487 488 if (mach_get_model) 489 mach_get_model(model); 490 else 491 strcpy(model, "Unknown m68k"); 492 493 len += sprintf(buffer + len, "Model:\t\t%s\n", model); 494 for (mem = 0, i = 0; i < m68k_num_memory; i++) 495 mem += m68k_memory[i].size; 496 len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10); 497 498 if (mach_get_hardware_list) 499 len += mach_get_hardware_list(buffer + len); 500 501 return len; 502 } 503 504 void check_bugs(void) 505 { 506 #ifndef CONFIG_M68KFPU_EMU 507 if (m68k_fputype == 0) { 508 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 509 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 510 printk(KERN_EMERG "Upgrade your hardware or join the FPU " 511 "emulation project\n"); 512 panic("no FPU"); 513 } 514 #endif /* !CONFIG_M68KFPU_EMU */ 515 } 516 517 #ifdef CONFIG_ADB 518 static int __init adb_probe_sync_enable (char *str) { 519 extern int __adb_probe_sync; 520 __adb_probe_sync = 1; 521 return 1; 522 } 523 524 __setup("adb_sync", adb_probe_sync_enable); 525 #endif /* CONFIG_ADB */ 526