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 unsigned long m68k_fputype; 46 unsigned long m68k_mmutype; 47 #ifdef CONFIG_VME 48 unsigned long vme_brdtype; 49 #endif 50 51 int m68k_is040or060; 52 53 extern int end; 54 extern unsigned long availmem; 55 56 int m68k_num_memory; 57 int m68k_realnum_memory; 58 unsigned long m68k_memoffset; 59 struct mem_info m68k_memory[NUM_MEMINFO]; 60 61 static struct mem_info m68k_ramdisk; 62 63 static char m68k_command_line[CL_SIZE]; 64 65 char m68k_debug_device[6] = ""; 66 67 void (*mach_sched_init) (irqreturn_t (*handler)(int, void *, struct pt_regs *)) __initdata = NULL; 68 /* machine dependent irq functions */ 69 void (*mach_init_IRQ) (void) __initdata = NULL; 70 void (*mach_get_model) (char *model); 71 int (*mach_get_hardware_list) (char *buffer); 72 /* machine dependent timer functions */ 73 unsigned long (*mach_gettimeoffset) (void); 74 int (*mach_hwclk) (int, struct rtc_time*); 75 int (*mach_set_clock_mmss) (unsigned long); 76 unsigned int (*mach_get_ss)(void); 77 int (*mach_get_rtc_pll)(struct rtc_pll_info *); 78 int (*mach_set_rtc_pll)(struct rtc_pll_info *); 79 void (*mach_reset)( void ); 80 void (*mach_halt)( void ); 81 void (*mach_power_off)( void ); 82 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 83 #ifdef CONFIG_HEARTBEAT 84 void (*mach_heartbeat) (int); 85 EXPORT_SYMBOL(mach_heartbeat); 86 #endif 87 #ifdef CONFIG_M68K_L2_CACHE 88 void (*mach_l2_flush) (int); 89 #endif 90 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) 91 void (*mach_beep)(unsigned int, unsigned int); 92 #endif 93 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 94 int isa_type; 95 int isa_sex; 96 EXPORT_SYMBOL(isa_type); 97 EXPORT_SYMBOL(isa_sex); 98 #endif 99 100 extern int amiga_parse_bootinfo(const struct bi_record *); 101 extern int atari_parse_bootinfo(const struct bi_record *); 102 extern int mac_parse_bootinfo(const struct bi_record *); 103 extern int q40_parse_bootinfo(const struct bi_record *); 104 extern int bvme6000_parse_bootinfo(const struct bi_record *); 105 extern int mvme16x_parse_bootinfo(const struct bi_record *); 106 extern int mvme147_parse_bootinfo(const struct bi_record *); 107 extern int hp300_parse_bootinfo(const struct bi_record *); 108 109 extern void config_amiga(void); 110 extern void config_atari(void); 111 extern void config_mac(void); 112 extern void config_sun3(void); 113 extern void config_apollo(void); 114 extern void config_mvme147(void); 115 extern void config_mvme16x(void); 116 extern void config_bvme6000(void); 117 extern void config_hp300(void); 118 extern void config_q40(void); 119 extern void config_sun3x(void); 120 121 extern void mac_debugging_short (int, short); 122 extern void mac_debugging_long (int, long); 123 124 #define MASK_256K 0xfffc0000 125 126 extern void paging_init(void); 127 128 static void __init m68k_parse_bootinfo(const struct bi_record *record) 129 { 130 while (record->tag != BI_LAST) { 131 int unknown = 0; 132 const unsigned long *data = record->data; 133 switch (record->tag) { 134 case BI_MACHTYPE: 135 case BI_CPUTYPE: 136 case BI_FPUTYPE: 137 case BI_MMUTYPE: 138 /* Already set up by head.S */ 139 break; 140 141 case BI_MEMCHUNK: 142 if (m68k_num_memory < NUM_MEMINFO) { 143 m68k_memory[m68k_num_memory].addr = data[0]; 144 m68k_memory[m68k_num_memory].size = data[1]; 145 m68k_num_memory++; 146 } else 147 printk("m68k_parse_bootinfo: too many memory chunks\n"); 148 break; 149 150 case BI_RAMDISK: 151 m68k_ramdisk.addr = data[0]; 152 m68k_ramdisk.size = data[1]; 153 break; 154 155 case BI_COMMAND_LINE: 156 strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line)); 157 break; 158 159 default: 160 if (MACH_IS_AMIGA) 161 unknown = amiga_parse_bootinfo(record); 162 else if (MACH_IS_ATARI) 163 unknown = atari_parse_bootinfo(record); 164 else if (MACH_IS_MAC) 165 unknown = mac_parse_bootinfo(record); 166 else if (MACH_IS_Q40) 167 unknown = q40_parse_bootinfo(record); 168 else if (MACH_IS_BVME6000) 169 unknown = bvme6000_parse_bootinfo(record); 170 else if (MACH_IS_MVME16x) 171 unknown = mvme16x_parse_bootinfo(record); 172 else if (MACH_IS_MVME147) 173 unknown = mvme147_parse_bootinfo(record); 174 else if (MACH_IS_HP300) 175 unknown = hp300_parse_bootinfo(record); 176 else 177 unknown = 1; 178 } 179 if (unknown) 180 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", 181 record->tag); 182 record = (struct bi_record *)((unsigned long)record+record->size); 183 } 184 185 m68k_realnum_memory = m68k_num_memory; 186 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 187 if (m68k_num_memory > 1) { 188 printk("Ignoring last %i chunks of physical memory\n", 189 (m68k_num_memory - 1)); 190 m68k_num_memory = 1; 191 } 192 m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET; 193 #endif 194 } 195 196 void __init setup_arch(char **cmdline_p) 197 { 198 extern int _etext, _edata, _end; 199 #ifndef CONFIG_SUN3 200 unsigned long endmem, startmem; 201 #endif 202 int i; 203 char *p, *q; 204 205 /* The bootinfo is located right after the kernel bss */ 206 m68k_parse_bootinfo((const struct bi_record *)&_end); 207 208 if (CPU_IS_040) 209 m68k_is040or060 = 4; 210 else if (CPU_IS_060) 211 m68k_is040or060 = 6; 212 213 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 214 * be confused by software FPU emulation. BEWARE. 215 * We should really do our own FPU check at startup. 216 * [what do we do with buggy 68LC040s? if we have problems 217 * with them, we should add a test to check_bugs() below] */ 218 #ifndef CONFIG_M68KFPU_EMU_ONLY 219 /* clear the fpu if we have one */ 220 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) { 221 volatile int zero = 0; 222 asm __volatile__ ("frestore %0" : : "m" (zero)); 223 } 224 #endif 225 226 if (CPU_IS_060) { 227 u32 pcr; 228 229 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 230 : "=d" (pcr)); 231 if (((pcr >> 8) & 0xff) <= 5) { 232 printk("Enabling workaround for errata I14\n"); 233 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 234 : : "d" (pcr | 0x20)); 235 } 236 } 237 238 init_mm.start_code = PAGE_OFFSET; 239 init_mm.end_code = (unsigned long) &_etext; 240 init_mm.end_data = (unsigned long) &_edata; 241 init_mm.brk = (unsigned long) &_end; 242 243 *cmdline_p = m68k_command_line; 244 memcpy(saved_command_line, *cmdline_p, CL_SIZE); 245 246 /* Parse the command line for arch-specific options. 247 * For the m68k, this is currently only "debug=xxx" to enable printing 248 * certain kernel messages to some machine-specific device. 249 */ 250 for( p = *cmdline_p; p && *p; ) { 251 i = 0; 252 if (!strncmp( p, "debug=", 6 )) { 253 strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) ); 254 if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0; 255 i = 1; 256 } 257 #ifdef CONFIG_ATARI 258 /* This option must be parsed very early */ 259 if (!strncmp( p, "switches=", 9 )) { 260 extern void atari_switches_setup( const char *, int ); 261 atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ? 262 (q - (p+9)) : strlen(p+9) ); 263 i = 1; 264 } 265 #endif 266 267 if (i) { 268 /* option processed, delete it */ 269 if ((q = strchr( p, ' ' ))) 270 strcpy( p, q+1 ); 271 else 272 *p = 0; 273 } else { 274 if ((p = strchr( p, ' ' ))) ++p; 275 } 276 } 277 278 #ifdef CONFIG_DUMMY_CONSOLE 279 conswitchp = &dummy_con; 280 #endif 281 282 switch (m68k_machtype) { 283 #ifdef CONFIG_AMIGA 284 case MACH_AMIGA: 285 config_amiga(); 286 break; 287 #endif 288 #ifdef CONFIG_ATARI 289 case MACH_ATARI: 290 config_atari(); 291 break; 292 #endif 293 #ifdef CONFIG_MAC 294 case MACH_MAC: 295 config_mac(); 296 break; 297 #endif 298 #ifdef CONFIG_SUN3 299 case MACH_SUN3: 300 config_sun3(); 301 break; 302 #endif 303 #ifdef CONFIG_APOLLO 304 case MACH_APOLLO: 305 config_apollo(); 306 break; 307 #endif 308 #ifdef CONFIG_MVME147 309 case MACH_MVME147: 310 config_mvme147(); 311 break; 312 #endif 313 #ifdef CONFIG_MVME16x 314 case MACH_MVME16x: 315 config_mvme16x(); 316 break; 317 #endif 318 #ifdef CONFIG_BVME6000 319 case MACH_BVME6000: 320 config_bvme6000(); 321 break; 322 #endif 323 #ifdef CONFIG_HP300 324 case MACH_HP300: 325 config_hp300(); 326 break; 327 #endif 328 #ifdef CONFIG_Q40 329 case MACH_Q40: 330 config_q40(); 331 break; 332 #endif 333 #ifdef CONFIG_SUN3X 334 case MACH_SUN3X: 335 config_sun3x(); 336 break; 337 #endif 338 default: 339 panic ("No configuration setup"); 340 } 341 342 #ifndef CONFIG_SUN3 343 startmem= m68k_memory[0].addr; 344 endmem = startmem + m68k_memory[0].size; 345 high_memory = (void *)PAGE_OFFSET; 346 for (i = 0; i < m68k_num_memory; i++) { 347 m68k_memory[i].size &= MASK_256K; 348 if (m68k_memory[i].addr < startmem) 349 startmem = m68k_memory[i].addr; 350 if (m68k_memory[i].addr+m68k_memory[i].size > endmem) 351 endmem = m68k_memory[i].addr+m68k_memory[i].size; 352 high_memory += m68k_memory[i].size; 353 } 354 355 availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT, 356 startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT); 357 358 for (i = 0; i < m68k_num_memory; i++) 359 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size); 360 361 reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr); 362 363 #ifdef CONFIG_BLK_DEV_INITRD 364 if (m68k_ramdisk.size) { 365 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size); 366 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 367 initrd_end = initrd_start + m68k_ramdisk.size; 368 printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 369 } 370 #endif 371 372 #ifdef CONFIG_ATARI 373 if (MACH_IS_ATARI) 374 atari_stram_reserve_pages((void *)availmem); 375 #endif 376 #ifdef CONFIG_SUN3X 377 if (MACH_IS_SUN3X) { 378 dvma_init(); 379 } 380 #endif 381 382 #endif /* !CONFIG_SUN3 */ 383 384 paging_init(); 385 386 /* set ISA defs early as possible */ 387 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 388 #if defined(CONFIG_Q40) 389 if (MACH_IS_Q40) { 390 isa_type = Q40_ISA; 391 isa_sex = 0; 392 } 393 #elif defined(CONFIG_GG2) 394 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){ 395 isa_type = GG2_ISA; 396 isa_sex = 0; 397 } 398 #elif defined(CONFIG_AMIGA_PCMCIA) 399 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){ 400 isa_type = AG_ISA; 401 isa_sex = 1; 402 } 403 #endif 404 #endif 405 } 406 407 static int show_cpuinfo(struct seq_file *m, void *v) 408 { 409 const char *cpu, *mmu, *fpu; 410 unsigned long clockfreq, clockfactor; 411 412 #define LOOP_CYCLES_68020 (8) 413 #define LOOP_CYCLES_68030 (8) 414 #define LOOP_CYCLES_68040 (3) 415 #define LOOP_CYCLES_68060 (1) 416 417 if (CPU_IS_020) { 418 cpu = "68020"; 419 clockfactor = LOOP_CYCLES_68020; 420 } else if (CPU_IS_030) { 421 cpu = "68030"; 422 clockfactor = LOOP_CYCLES_68030; 423 } else if (CPU_IS_040) { 424 cpu = "68040"; 425 clockfactor = LOOP_CYCLES_68040; 426 } else if (CPU_IS_060) { 427 cpu = "68060"; 428 clockfactor = LOOP_CYCLES_68060; 429 } else { 430 cpu = "680x0"; 431 clockfactor = 0; 432 } 433 434 #ifdef CONFIG_M68KFPU_EMU_ONLY 435 fpu="none(soft float)"; 436 #else 437 if (m68k_fputype & FPU_68881) 438 fpu = "68881"; 439 else if (m68k_fputype & FPU_68882) 440 fpu = "68882"; 441 else if (m68k_fputype & FPU_68040) 442 fpu = "68040"; 443 else if (m68k_fputype & FPU_68060) 444 fpu = "68060"; 445 else if (m68k_fputype & FPU_SUNFPA) 446 fpu = "Sun FPA"; 447 else 448 fpu = "none"; 449 #endif 450 451 if (m68k_mmutype & MMU_68851) 452 mmu = "68851"; 453 else if (m68k_mmutype & MMU_68030) 454 mmu = "68030"; 455 else if (m68k_mmutype & MMU_68040) 456 mmu = "68040"; 457 else if (m68k_mmutype & MMU_68060) 458 mmu = "68060"; 459 else if (m68k_mmutype & MMU_SUN3) 460 mmu = "Sun-3"; 461 else if (m68k_mmutype & MMU_APOLLO) 462 mmu = "Apollo"; 463 else 464 mmu = "unknown"; 465 466 clockfreq = loops_per_jiffy*HZ*clockfactor; 467 468 seq_printf(m, "CPU:\t\t%s\n" 469 "MMU:\t\t%s\n" 470 "FPU:\t\t%s\n" 471 "Clocking:\t%lu.%1luMHz\n" 472 "BogoMips:\t%lu.%02lu\n" 473 "Calibration:\t%lu loops\n", 474 cpu, mmu, fpu, 475 clockfreq/1000000,(clockfreq/100000)%10, 476 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 477 loops_per_jiffy); 478 return 0; 479 } 480 481 static void *c_start(struct seq_file *m, loff_t *pos) 482 { 483 return *pos < 1 ? (void *)1 : NULL; 484 } 485 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 486 { 487 ++*pos; 488 return NULL; 489 } 490 static void c_stop(struct seq_file *m, void *v) 491 { 492 } 493 struct seq_operations cpuinfo_op = { 494 .start = c_start, 495 .next = c_next, 496 .stop = c_stop, 497 .show = show_cpuinfo, 498 }; 499 500 int get_hardware_list(char *buffer) 501 { 502 int len = 0; 503 char model[80]; 504 unsigned long mem; 505 int i; 506 507 if (mach_get_model) 508 mach_get_model(model); 509 else 510 strcpy(model, "Unknown m68k"); 511 512 len += sprintf(buffer+len, "Model:\t\t%s\n", model); 513 for (mem = 0, i = 0; i < m68k_num_memory; i++) 514 mem += m68k_memory[i].size; 515 len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10); 516 517 if (mach_get_hardware_list) 518 len += mach_get_hardware_list(buffer+len); 519 520 return(len); 521 } 522 523 void check_bugs(void) 524 { 525 #ifndef CONFIG_M68KFPU_EMU 526 if (m68k_fputype == 0) { 527 printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 528 "WHICH IS REQUIRED BY LINUX/M68K ***\n" ); 529 printk( KERN_EMERG "Upgrade your hardware or join the FPU " 530 "emulation project\n" ); 531 panic( "no FPU" ); 532 } 533 #endif /* !CONFIG_M68KFPU_EMU */ 534 } 535