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