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