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