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 EXPORT_SYMBOL(m68k_num_memory); 62 int m68k_realnum_memory; 63 EXPORT_SYMBOL(m68k_realnum_memory); 64 unsigned long 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 #endif 203 } 204 205 void __init setup_arch(char **cmdline_p) 206 { 207 extern int _etext, _edata, _end; 208 int i; 209 210 /* The bootinfo is located right after the kernel bss */ 211 m68k_parse_bootinfo((const struct bi_record *)&_end); 212 213 if (CPU_IS_040) 214 m68k_is040or060 = 4; 215 else if (CPU_IS_060) 216 m68k_is040or060 = 6; 217 218 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 219 * be confused by software FPU emulation. BEWARE. 220 * We should really do our own FPU check at startup. 221 * [what do we do with buggy 68LC040s? if we have problems 222 * with them, we should add a test to check_bugs() below] */ 223 #ifndef CONFIG_M68KFPU_EMU_ONLY 224 /* clear the fpu if we have one */ 225 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) { 226 volatile int zero = 0; 227 asm volatile ("frestore %0" : : "m" (zero)); 228 } 229 #endif 230 231 if (CPU_IS_060) { 232 u32 pcr; 233 234 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 235 : "=d" (pcr)); 236 if (((pcr >> 8) & 0xff) <= 5) { 237 printk("Enabling workaround for errata I14\n"); 238 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 239 : : "d" (pcr | 0x20)); 240 } 241 } 242 243 init_mm.start_code = PAGE_OFFSET; 244 init_mm.end_code = (unsigned long) &_etext; 245 init_mm.end_data = (unsigned long) &_edata; 246 init_mm.brk = (unsigned long) &_end; 247 248 *cmdline_p = m68k_command_line; 249 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 250 251 parse_early_param(); 252 253 #ifdef CONFIG_DUMMY_CONSOLE 254 conswitchp = &dummy_con; 255 #endif 256 257 switch (m68k_machtype) { 258 #ifdef CONFIG_AMIGA 259 case MACH_AMIGA: 260 config_amiga(); 261 break; 262 #endif 263 #ifdef CONFIG_ATARI 264 case MACH_ATARI: 265 config_atari(); 266 break; 267 #endif 268 #ifdef CONFIG_MAC 269 case MACH_MAC: 270 config_mac(); 271 break; 272 #endif 273 #ifdef CONFIG_SUN3 274 case MACH_SUN3: 275 config_sun3(); 276 break; 277 #endif 278 #ifdef CONFIG_APOLLO 279 case MACH_APOLLO: 280 config_apollo(); 281 break; 282 #endif 283 #ifdef CONFIG_MVME147 284 case MACH_MVME147: 285 config_mvme147(); 286 break; 287 #endif 288 #ifdef CONFIG_MVME16x 289 case MACH_MVME16x: 290 config_mvme16x(); 291 break; 292 #endif 293 #ifdef CONFIG_BVME6000 294 case MACH_BVME6000: 295 config_bvme6000(); 296 break; 297 #endif 298 #ifdef CONFIG_HP300 299 case MACH_HP300: 300 config_hp300(); 301 break; 302 #endif 303 #ifdef CONFIG_Q40 304 case MACH_Q40: 305 config_q40(); 306 break; 307 #endif 308 #ifdef CONFIG_SUN3X 309 case MACH_SUN3X: 310 config_sun3x(); 311 break; 312 #endif 313 default: 314 panic("No configuration setup"); 315 } 316 317 paging_init(); 318 319 #ifndef CONFIG_SUN3 320 for (i = 1; i < m68k_num_memory; i++) 321 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr, 322 m68k_memory[i].size); 323 #ifdef CONFIG_BLK_DEV_INITRD 324 if (m68k_ramdisk.size) { 325 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)), 326 m68k_ramdisk.addr, m68k_ramdisk.size); 327 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 328 initrd_end = initrd_start + m68k_ramdisk.size; 329 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 330 } 331 #endif 332 333 #ifdef CONFIG_ATARI 334 if (MACH_IS_ATARI) 335 atari_stram_reserve_pages((void *)availmem); 336 #endif 337 #ifdef CONFIG_SUN3X 338 if (MACH_IS_SUN3X) { 339 dvma_init(); 340 } 341 #endif 342 343 #endif /* !CONFIG_SUN3 */ 344 345 /* set ISA defs early as possible */ 346 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 347 #if defined(CONFIG_Q40) 348 if (MACH_IS_Q40) { 349 isa_type = Q40_ISA; 350 isa_sex = 0; 351 } 352 #elif defined(CONFIG_GG2) 353 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) { 354 isa_type = GG2_ISA; 355 isa_sex = 0; 356 } 357 #elif defined(CONFIG_AMIGA_PCMCIA) 358 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 359 isa_type = AG_ISA; 360 isa_sex = 1; 361 } 362 #endif 363 #endif 364 } 365 366 static int show_cpuinfo(struct seq_file *m, void *v) 367 { 368 const char *cpu, *mmu, *fpu; 369 unsigned long clockfreq, clockfactor; 370 371 #define LOOP_CYCLES_68020 (8) 372 #define LOOP_CYCLES_68030 (8) 373 #define LOOP_CYCLES_68040 (3) 374 #define LOOP_CYCLES_68060 (1) 375 376 if (CPU_IS_020) { 377 cpu = "68020"; 378 clockfactor = LOOP_CYCLES_68020; 379 } else if (CPU_IS_030) { 380 cpu = "68030"; 381 clockfactor = LOOP_CYCLES_68030; 382 } else if (CPU_IS_040) { 383 cpu = "68040"; 384 clockfactor = LOOP_CYCLES_68040; 385 } else if (CPU_IS_060) { 386 cpu = "68060"; 387 clockfactor = LOOP_CYCLES_68060; 388 } else { 389 cpu = "680x0"; 390 clockfactor = 0; 391 } 392 393 #ifdef CONFIG_M68KFPU_EMU_ONLY 394 fpu = "none(soft float)"; 395 #else 396 if (m68k_fputype & FPU_68881) 397 fpu = "68881"; 398 else if (m68k_fputype & FPU_68882) 399 fpu = "68882"; 400 else if (m68k_fputype & FPU_68040) 401 fpu = "68040"; 402 else if (m68k_fputype & FPU_68060) 403 fpu = "68060"; 404 else if (m68k_fputype & FPU_SUNFPA) 405 fpu = "Sun FPA"; 406 else 407 fpu = "none"; 408 #endif 409 410 if (m68k_mmutype & MMU_68851) 411 mmu = "68851"; 412 else if (m68k_mmutype & MMU_68030) 413 mmu = "68030"; 414 else if (m68k_mmutype & MMU_68040) 415 mmu = "68040"; 416 else if (m68k_mmutype & MMU_68060) 417 mmu = "68060"; 418 else if (m68k_mmutype & MMU_SUN3) 419 mmu = "Sun-3"; 420 else if (m68k_mmutype & MMU_APOLLO) 421 mmu = "Apollo"; 422 else 423 mmu = "unknown"; 424 425 clockfreq = loops_per_jiffy * HZ * clockfactor; 426 427 seq_printf(m, "CPU:\t\t%s\n" 428 "MMU:\t\t%s\n" 429 "FPU:\t\t%s\n" 430 "Clocking:\t%lu.%1luMHz\n" 431 "BogoMips:\t%lu.%02lu\n" 432 "Calibration:\t%lu loops\n", 433 cpu, mmu, fpu, 434 clockfreq/1000000,(clockfreq/100000)%10, 435 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 436 loops_per_jiffy); 437 return 0; 438 } 439 440 static void *c_start(struct seq_file *m, loff_t *pos) 441 { 442 return *pos < 1 ? (void *)1 : NULL; 443 } 444 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 445 { 446 ++*pos; 447 return NULL; 448 } 449 static void c_stop(struct seq_file *m, void *v) 450 { 451 } 452 struct seq_operations cpuinfo_op = { 453 .start = c_start, 454 .next = c_next, 455 .stop = c_stop, 456 .show = show_cpuinfo, 457 }; 458 459 int get_hardware_list(char *buffer) 460 { 461 int len = 0; 462 char model[80]; 463 unsigned long mem; 464 int i; 465 466 if (mach_get_model) 467 mach_get_model(model); 468 else 469 strcpy(model, "Unknown m68k"); 470 471 len += sprintf(buffer + len, "Model:\t\t%s\n", model); 472 for (mem = 0, i = 0; i < m68k_num_memory; i++) 473 mem += m68k_memory[i].size; 474 len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10); 475 476 if (mach_get_hardware_list) 477 len += mach_get_hardware_list(buffer + len); 478 479 return len; 480 } 481 482 void check_bugs(void) 483 { 484 #ifndef CONFIG_M68KFPU_EMU 485 if (m68k_fputype == 0) { 486 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 487 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 488 printk(KERN_EMERG "Upgrade your hardware or join the FPU " 489 "emulation project\n"); 490 panic("no FPU"); 491 } 492 #endif /* !CONFIG_M68KFPU_EMU */ 493 } 494 495 #ifdef CONFIG_ADB 496 static int __init adb_probe_sync_enable (char *str) { 497 extern int __adb_probe_sync; 498 __adb_probe_sync = 1; 499 return 1; 500 } 501 502 __setup("adb_sync", adb_probe_sync_enable); 503 #endif /* CONFIG_ADB */ 504