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/config.h> 12 #include <linux/kernel.h> 13 #include <linux/mm.h> 14 #include <linux/sched.h> 15 #include <linux/delay.h> 16 #include <linux/interrupt.h> 17 #include <linux/fs.h> 18 #include <linux/console.h> 19 #include <linux/genhd.h> 20 #include <linux/errno.h> 21 #include <linux/string.h> 22 #include <linux/init.h> 23 #include <linux/bootmem.h> 24 #include <linux/seq_file.h> 25 #include <linux/module.h> 26 #include <linux/initrd.h> 27 28 #include <asm/bootinfo.h> 29 #include <asm/setup.h> 30 #include <asm/irq.h> 31 #include <asm/io.h> 32 #include <asm/machdep.h> 33 #ifdef CONFIG_AMIGA 34 #include <asm/amigahw.h> 35 #endif 36 #ifdef CONFIG_ATARI 37 #include <asm/atarihw.h> 38 #include <asm/atari_stram.h> 39 #endif 40 #ifdef CONFIG_SUN3X 41 #include <asm/dvma.h> 42 #endif 43 44 unsigned long m68k_machtype; 45 unsigned long m68k_cputype; 46 unsigned long m68k_fputype; 47 unsigned long m68k_mmutype; 48 #ifdef CONFIG_VME 49 unsigned long vme_brdtype; 50 #endif 51 52 int m68k_is040or060; 53 54 extern int end; 55 extern unsigned long availmem; 56 57 int m68k_num_memory; 58 int m68k_realnum_memory; 59 unsigned long m68k_memoffset; 60 struct mem_info m68k_memory[NUM_MEMINFO]; 61 62 static struct mem_info m68k_ramdisk; 63 64 static char m68k_command_line[CL_SIZE]; 65 66 char m68k_debug_device[6] = ""; 67 68 void (*mach_sched_init) (irqreturn_t (*handler)(int, void *, struct pt_regs *)) __initdata = NULL; 69 /* machine dependent irq functions */ 70 void (*mach_init_IRQ) (void) __initdata = NULL; 71 irqreturn_t (*(*mach_default_handler)[]) (int, void *, struct pt_regs *); 72 void (*mach_get_model) (char *model); 73 int (*mach_get_hardware_list) (char *buffer); 74 int (*mach_get_irq_list) (struct seq_file *, void *); 75 irqreturn_t (*mach_process_int) (int, struct pt_regs *); 76 /* machine dependent timer functions */ 77 unsigned long (*mach_gettimeoffset) (void); 78 int (*mach_hwclk) (int, struct rtc_time*); 79 int (*mach_set_clock_mmss) (unsigned long); 80 unsigned int (*mach_get_ss)(void); 81 int (*mach_get_rtc_pll)(struct rtc_pll_info *); 82 int (*mach_set_rtc_pll)(struct rtc_pll_info *); 83 void (*mach_reset)( void ); 84 void (*mach_halt)( void ); 85 void (*mach_power_off)( void ); 86 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 87 #ifdef CONFIG_HEARTBEAT 88 void (*mach_heartbeat) (int); 89 EXPORT_SYMBOL(mach_heartbeat); 90 #endif 91 #ifdef CONFIG_M68K_L2_CACHE 92 void (*mach_l2_flush) (int); 93 #endif 94 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) 95 void (*mach_beep)(unsigned int, unsigned int); 96 #endif 97 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 98 int isa_type; 99 int isa_sex; 100 EXPORT_SYMBOL(isa_type); 101 EXPORT_SYMBOL(isa_sex); 102 #endif 103 104 extern int amiga_parse_bootinfo(const struct bi_record *); 105 extern int atari_parse_bootinfo(const struct bi_record *); 106 extern int mac_parse_bootinfo(const struct bi_record *); 107 extern int q40_parse_bootinfo(const struct bi_record *); 108 extern int bvme6000_parse_bootinfo(const struct bi_record *); 109 extern int mvme16x_parse_bootinfo(const struct bi_record *); 110 extern int mvme147_parse_bootinfo(const struct bi_record *); 111 extern int hp300_parse_bootinfo(const struct bi_record *); 112 113 extern void config_amiga(void); 114 extern void config_atari(void); 115 extern void config_mac(void); 116 extern void config_sun3(void); 117 extern void config_apollo(void); 118 extern void config_mvme147(void); 119 extern void config_mvme16x(void); 120 extern void config_bvme6000(void); 121 extern void config_hp300(void); 122 extern void config_q40(void); 123 extern void config_sun3x(void); 124 125 extern void mac_debugging_short (int, short); 126 extern void mac_debugging_long (int, long); 127 128 #define MASK_256K 0xfffc0000 129 130 extern void paging_init(void); 131 132 static void __init m68k_parse_bootinfo(const struct bi_record *record) 133 { 134 while (record->tag != BI_LAST) { 135 int unknown = 0; 136 const unsigned long *data = record->data; 137 switch (record->tag) { 138 case BI_MACHTYPE: 139 case BI_CPUTYPE: 140 case BI_FPUTYPE: 141 case BI_MMUTYPE: 142 /* Already set up by head.S */ 143 break; 144 145 case BI_MEMCHUNK: 146 if (m68k_num_memory < NUM_MEMINFO) { 147 m68k_memory[m68k_num_memory].addr = data[0]; 148 m68k_memory[m68k_num_memory].size = data[1]; 149 m68k_num_memory++; 150 } else 151 printk("m68k_parse_bootinfo: too many memory chunks\n"); 152 break; 153 154 case BI_RAMDISK: 155 m68k_ramdisk.addr = data[0]; 156 m68k_ramdisk.size = data[1]; 157 break; 158 159 case BI_COMMAND_LINE: 160 strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line)); 161 break; 162 163 default: 164 if (MACH_IS_AMIGA) 165 unknown = amiga_parse_bootinfo(record); 166 else if (MACH_IS_ATARI) 167 unknown = atari_parse_bootinfo(record); 168 else if (MACH_IS_MAC) 169 unknown = mac_parse_bootinfo(record); 170 else if (MACH_IS_Q40) 171 unknown = q40_parse_bootinfo(record); 172 else if (MACH_IS_BVME6000) 173 unknown = bvme6000_parse_bootinfo(record); 174 else if (MACH_IS_MVME16x) 175 unknown = mvme16x_parse_bootinfo(record); 176 else if (MACH_IS_MVME147) 177 unknown = mvme147_parse_bootinfo(record); 178 else if (MACH_IS_HP300) 179 unknown = hp300_parse_bootinfo(record); 180 else 181 unknown = 1; 182 } 183 if (unknown) 184 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", 185 record->tag); 186 record = (struct bi_record *)((unsigned long)record+record->size); 187 } 188 189 m68k_realnum_memory = m68k_num_memory; 190 #ifdef CONFIG_SINGLE_MEMORY_CHUNK 191 if (m68k_num_memory > 1) { 192 printk("Ignoring last %i chunks of physical memory\n", 193 (m68k_num_memory - 1)); 194 m68k_num_memory = 1; 195 } 196 m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET; 197 #endif 198 } 199 200 void __init setup_arch(char **cmdline_p) 201 { 202 extern int _etext, _edata, _end; 203 #ifndef CONFIG_SUN3 204 unsigned long endmem, startmem; 205 #endif 206 int i; 207 char *p, *q; 208 209 /* The bootinfo is located right after the kernel bss */ 210 m68k_parse_bootinfo((const struct bi_record *)&_end); 211 212 if (CPU_IS_040) 213 m68k_is040or060 = 4; 214 else if (CPU_IS_060) 215 m68k_is040or060 = 6; 216 217 /* FIXME: m68k_fputype is passed in by Penguin booter, which can 218 * be confused by software FPU emulation. BEWARE. 219 * We should really do our own FPU check at startup. 220 * [what do we do with buggy 68LC040s? if we have problems 221 * with them, we should add a test to check_bugs() below] */ 222 #ifndef CONFIG_M68KFPU_EMU_ONLY 223 /* clear the fpu if we have one */ 224 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) { 225 volatile int zero = 0; 226 asm __volatile__ ("frestore %0" : : "m" (zero)); 227 } 228 #endif 229 230 if (CPU_IS_060) { 231 u32 pcr; 232 233 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 234 : "=d" (pcr)); 235 if (((pcr >> 8) & 0xff) <= 5) { 236 printk("Enabling workaround for errata I14\n"); 237 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 238 : : "d" (pcr | 0x20)); 239 } 240 } 241 242 init_mm.start_code = PAGE_OFFSET; 243 init_mm.end_code = (unsigned long) &_etext; 244 init_mm.end_data = (unsigned long) &_edata; 245 init_mm.brk = (unsigned long) &_end; 246 247 *cmdline_p = m68k_command_line; 248 memcpy(saved_command_line, *cmdline_p, CL_SIZE); 249 250 /* Parse the command line for arch-specific options. 251 * For the m68k, this is currently only "debug=xxx" to enable printing 252 * certain kernel messages to some machine-specific device. 253 */ 254 for( p = *cmdline_p; p && *p; ) { 255 i = 0; 256 if (!strncmp( p, "debug=", 6 )) { 257 strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) ); 258 if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0; 259 i = 1; 260 } 261 #ifdef CONFIG_ATARI 262 /* This option must be parsed very early */ 263 if (!strncmp( p, "switches=", 9 )) { 264 extern void atari_switches_setup( const char *, int ); 265 atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ? 266 (q - (p+9)) : strlen(p+9) ); 267 i = 1; 268 } 269 #endif 270 271 if (i) { 272 /* option processed, delete it */ 273 if ((q = strchr( p, ' ' ))) 274 strcpy( p, q+1 ); 275 else 276 *p = 0; 277 } else { 278 if ((p = strchr( p, ' ' ))) ++p; 279 } 280 } 281 282 #ifdef CONFIG_DUMMY_CONSOLE 283 conswitchp = &dummy_con; 284 #endif 285 286 switch (m68k_machtype) { 287 #ifdef CONFIG_AMIGA 288 case MACH_AMIGA: 289 config_amiga(); 290 break; 291 #endif 292 #ifdef CONFIG_ATARI 293 case MACH_ATARI: 294 config_atari(); 295 break; 296 #endif 297 #ifdef CONFIG_MAC 298 case MACH_MAC: 299 config_mac(); 300 break; 301 #endif 302 #ifdef CONFIG_SUN3 303 case MACH_SUN3: 304 config_sun3(); 305 break; 306 #endif 307 #ifdef CONFIG_APOLLO 308 case MACH_APOLLO: 309 config_apollo(); 310 break; 311 #endif 312 #ifdef CONFIG_MVME147 313 case MACH_MVME147: 314 config_mvme147(); 315 break; 316 #endif 317 #ifdef CONFIG_MVME16x 318 case MACH_MVME16x: 319 config_mvme16x(); 320 break; 321 #endif 322 #ifdef CONFIG_BVME6000 323 case MACH_BVME6000: 324 config_bvme6000(); 325 break; 326 #endif 327 #ifdef CONFIG_HP300 328 case MACH_HP300: 329 config_hp300(); 330 break; 331 #endif 332 #ifdef CONFIG_Q40 333 case MACH_Q40: 334 config_q40(); 335 break; 336 #endif 337 #ifdef CONFIG_SUN3X 338 case MACH_SUN3X: 339 config_sun3x(); 340 break; 341 #endif 342 default: 343 panic ("No configuration setup"); 344 } 345 346 #ifndef CONFIG_SUN3 347 startmem= m68k_memory[0].addr; 348 endmem = startmem + m68k_memory[0].size; 349 high_memory = (void *)PAGE_OFFSET; 350 for (i = 0; i < m68k_num_memory; i++) { 351 m68k_memory[i].size &= MASK_256K; 352 if (m68k_memory[i].addr < startmem) 353 startmem = m68k_memory[i].addr; 354 if (m68k_memory[i].addr+m68k_memory[i].size > endmem) 355 endmem = m68k_memory[i].addr+m68k_memory[i].size; 356 high_memory += m68k_memory[i].size; 357 } 358 359 availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT, 360 startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT); 361 362 for (i = 0; i < m68k_num_memory; i++) 363 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size); 364 365 reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr); 366 367 #ifdef CONFIG_BLK_DEV_INITRD 368 if (m68k_ramdisk.size) { 369 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size); 370 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 371 initrd_end = initrd_start + m68k_ramdisk.size; 372 printk ("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 373 } 374 #endif 375 376 #ifdef CONFIG_ATARI 377 if (MACH_IS_ATARI) 378 atari_stram_reserve_pages((void *)availmem); 379 #endif 380 #ifdef CONFIG_SUN3X 381 if (MACH_IS_SUN3X) { 382 dvma_init(); 383 } 384 #endif 385 386 #endif /* !CONFIG_SUN3 */ 387 388 paging_init(); 389 390 /* set ISA defs early as possible */ 391 #if defined(CONFIG_ISA) && defined(MULTI_ISA) 392 #if defined(CONFIG_Q40) 393 if (MACH_IS_Q40) { 394 isa_type = Q40_ISA; 395 isa_sex = 0; 396 } 397 #elif defined(CONFIG_GG2) 398 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)){ 399 isa_type = GG2_ISA; 400 isa_sex = 0; 401 } 402 #elif defined(CONFIG_AMIGA_PCMCIA) 403 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)){ 404 isa_type = AG_ISA; 405 isa_sex = 1; 406 } 407 #endif 408 #endif 409 } 410 411 static int show_cpuinfo(struct seq_file *m, void *v) 412 { 413 const char *cpu, *mmu, *fpu; 414 unsigned long clockfreq, clockfactor; 415 416 #define LOOP_CYCLES_68020 (8) 417 #define LOOP_CYCLES_68030 (8) 418 #define LOOP_CYCLES_68040 (3) 419 #define LOOP_CYCLES_68060 (1) 420 421 if (CPU_IS_020) { 422 cpu = "68020"; 423 clockfactor = LOOP_CYCLES_68020; 424 } else if (CPU_IS_030) { 425 cpu = "68030"; 426 clockfactor = LOOP_CYCLES_68030; 427 } else if (CPU_IS_040) { 428 cpu = "68040"; 429 clockfactor = LOOP_CYCLES_68040; 430 } else if (CPU_IS_060) { 431 cpu = "68060"; 432 clockfactor = LOOP_CYCLES_68060; 433 } else { 434 cpu = "680x0"; 435 clockfactor = 0; 436 } 437 438 #ifdef CONFIG_M68KFPU_EMU_ONLY 439 fpu="none(soft float)"; 440 #else 441 if (m68k_fputype & FPU_68881) 442 fpu = "68881"; 443 else if (m68k_fputype & FPU_68882) 444 fpu = "68882"; 445 else if (m68k_fputype & FPU_68040) 446 fpu = "68040"; 447 else if (m68k_fputype & FPU_68060) 448 fpu = "68060"; 449 else if (m68k_fputype & FPU_SUNFPA) 450 fpu = "Sun FPA"; 451 else 452 fpu = "none"; 453 #endif 454 455 if (m68k_mmutype & MMU_68851) 456 mmu = "68851"; 457 else if (m68k_mmutype & MMU_68030) 458 mmu = "68030"; 459 else if (m68k_mmutype & MMU_68040) 460 mmu = "68040"; 461 else if (m68k_mmutype & MMU_68060) 462 mmu = "68060"; 463 else if (m68k_mmutype & MMU_SUN3) 464 mmu = "Sun-3"; 465 else if (m68k_mmutype & MMU_APOLLO) 466 mmu = "Apollo"; 467 else 468 mmu = "unknown"; 469 470 clockfreq = loops_per_jiffy*HZ*clockfactor; 471 472 seq_printf(m, "CPU:\t\t%s\n" 473 "MMU:\t\t%s\n" 474 "FPU:\t\t%s\n" 475 "Clocking:\t%lu.%1luMHz\n" 476 "BogoMips:\t%lu.%02lu\n" 477 "Calibration:\t%lu loops\n", 478 cpu, mmu, fpu, 479 clockfreq/1000000,(clockfreq/100000)%10, 480 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 481 loops_per_jiffy); 482 return 0; 483 } 484 485 static void *c_start(struct seq_file *m, loff_t *pos) 486 { 487 return *pos < 1 ? (void *)1 : NULL; 488 } 489 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 490 { 491 ++*pos; 492 return NULL; 493 } 494 static void c_stop(struct seq_file *m, void *v) 495 { 496 } 497 struct seq_operations cpuinfo_op = { 498 .start = c_start, 499 .next = c_next, 500 .stop = c_stop, 501 .show = show_cpuinfo, 502 }; 503 504 int get_hardware_list(char *buffer) 505 { 506 int len = 0; 507 char model[80]; 508 unsigned long mem; 509 int i; 510 511 if (mach_get_model) 512 mach_get_model(model); 513 else 514 strcpy(model, "Unknown m68k"); 515 516 len += sprintf(buffer+len, "Model:\t\t%s\n", model); 517 for (mem = 0, i = 0; i < m68k_num_memory; i++) 518 mem += m68k_memory[i].size; 519 len += sprintf(buffer+len, "System Memory:\t%ldK\n", mem>>10); 520 521 if (mach_get_hardware_list) 522 len += mach_get_hardware_list(buffer+len); 523 524 return(len); 525 } 526 527 void check_bugs(void) 528 { 529 #ifndef CONFIG_M68KFPU_EMU 530 if (m68k_fputype == 0) { 531 printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 532 "WHICH IS REQUIRED BY LINUX/M68K ***\n" ); 533 printk( KERN_EMERG "Upgrade your hardware or join the FPU " 534 "emulation project\n" ); 535 panic( "no FPU" ); 536 } 537 #endif /* !CONFIG_M68KFPU_EMU */ 538 } 539