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/proc_fs.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/sections.h> 30#include <asm/setup.h> 31#include <asm/fpu.h> 32#include <asm/irq.h> 33#include <asm/io.h> 34#include <asm/machdep.h> 35#ifdef CONFIG_AMIGA 36#include <asm/amigahw.h> 37#endif 38#ifdef CONFIG_ATARI 39#include <asm/atarihw.h> 40#include <asm/atari_stram.h> 41#endif 42#ifdef CONFIG_SUN3X 43#include <asm/dvma.h> 44#endif 45 46#if !FPSTATESIZE || !NR_IRQS 47#warning No CPU/platform type selected, your kernel will not work! 48#warning Are you building an allnoconfig kernel? 49#endif 50 51unsigned long m68k_machtype; 52EXPORT_SYMBOL(m68k_machtype); 53unsigned long m68k_cputype; 54EXPORT_SYMBOL(m68k_cputype); 55unsigned long m68k_fputype; 56unsigned long m68k_mmutype; 57EXPORT_SYMBOL(m68k_mmutype); 58#ifdef CONFIG_VME 59unsigned long vme_brdtype; 60EXPORT_SYMBOL(vme_brdtype); 61#endif 62 63int m68k_is040or060; 64EXPORT_SYMBOL(m68k_is040or060); 65 66extern unsigned long availmem; 67 68int m68k_num_memory; 69EXPORT_SYMBOL(m68k_num_memory); 70int m68k_realnum_memory; 71EXPORT_SYMBOL(m68k_realnum_memory); 72unsigned long m68k_memoffset; 73struct mem_info m68k_memory[NUM_MEMINFO]; 74EXPORT_SYMBOL(m68k_memory); 75 76struct mem_info m68k_ramdisk; 77 78static char m68k_command_line[CL_SIZE]; 79 80void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL; 81/* machine dependent irq functions */ 82void (*mach_init_IRQ) (void) __initdata = NULL; 83void (*mach_get_model) (char *model); 84void (*mach_get_hardware_list) (struct seq_file *m); 85/* machine dependent timer functions */ 86unsigned long (*mach_gettimeoffset) (void); 87int (*mach_hwclk) (int, struct rtc_time*); 88EXPORT_SYMBOL(mach_hwclk); 89int (*mach_set_clock_mmss) (unsigned long); 90unsigned int (*mach_get_ss)(void); 91int (*mach_get_rtc_pll)(struct rtc_pll_info *); 92int (*mach_set_rtc_pll)(struct rtc_pll_info *); 93EXPORT_SYMBOL(mach_get_ss); 94EXPORT_SYMBOL(mach_get_rtc_pll); 95EXPORT_SYMBOL(mach_set_rtc_pll); 96void (*mach_reset)( void ); 97void (*mach_halt)( void ); 98void (*mach_power_off)( void ); 99long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ 100#ifdef CONFIG_HEARTBEAT 101void (*mach_heartbeat) (int); 102EXPORT_SYMBOL(mach_heartbeat); 103#endif 104#ifdef CONFIG_M68K_L2_CACHE 105void (*mach_l2_flush) (int); 106#endif 107#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) 108void (*mach_beep)(unsigned int, unsigned int); 109EXPORT_SYMBOL(mach_beep); 110#endif 111#if defined(CONFIG_ISA) && defined(MULTI_ISA) 112int isa_type; 113int isa_sex; 114EXPORT_SYMBOL(isa_type); 115EXPORT_SYMBOL(isa_sex); 116#endif 117 118extern int amiga_parse_bootinfo(const struct bi_record *); 119extern int atari_parse_bootinfo(const struct bi_record *); 120extern int mac_parse_bootinfo(const struct bi_record *); 121extern int q40_parse_bootinfo(const struct bi_record *); 122extern int bvme6000_parse_bootinfo(const struct bi_record *); 123extern int mvme16x_parse_bootinfo(const struct bi_record *); 124extern int mvme147_parse_bootinfo(const struct bi_record *); 125extern int hp300_parse_bootinfo(const struct bi_record *); 126extern int apollo_parse_bootinfo(const struct bi_record *); 127 128extern void config_amiga(void); 129extern void config_atari(void); 130extern void config_mac(void); 131extern void config_sun3(void); 132extern void config_apollo(void); 133extern void config_mvme147(void); 134extern void config_mvme16x(void); 135extern void config_bvme6000(void); 136extern void config_hp300(void); 137extern void config_q40(void); 138extern void config_sun3x(void); 139 140#define MASK_256K 0xfffc0000 141 142extern void paging_init(void); 143 144static void __init m68k_parse_bootinfo(const struct bi_record *record) 145{ 146 while (record->tag != BI_LAST) { 147 int unknown = 0; 148 const unsigned long *data = record->data; 149 150 switch (record->tag) { 151 case BI_MACHTYPE: 152 case BI_CPUTYPE: 153 case BI_FPUTYPE: 154 case BI_MMUTYPE: 155 /* Already set up by head.S */ 156 break; 157 158 case BI_MEMCHUNK: 159 if (m68k_num_memory < NUM_MEMINFO) { 160 m68k_memory[m68k_num_memory].addr = data[0]; 161 m68k_memory[m68k_num_memory].size = data[1]; 162 m68k_num_memory++; 163 } else 164 printk("m68k_parse_bootinfo: too many memory chunks\n"); 165 break; 166 167 case BI_RAMDISK: 168 m68k_ramdisk.addr = data[0]; 169 m68k_ramdisk.size = data[1]; 170 break; 171 172 case BI_COMMAND_LINE: 173 strlcpy(m68k_command_line, (const char *)data, 174 sizeof(m68k_command_line)); 175 break; 176 177 default: 178 if (MACH_IS_AMIGA) 179 unknown = amiga_parse_bootinfo(record); 180 else if (MACH_IS_ATARI) 181 unknown = atari_parse_bootinfo(record); 182 else if (MACH_IS_MAC) 183 unknown = mac_parse_bootinfo(record); 184 else if (MACH_IS_Q40) 185 unknown = q40_parse_bootinfo(record); 186 else if (MACH_IS_BVME6000) 187 unknown = bvme6000_parse_bootinfo(record); 188 else if (MACH_IS_MVME16x) 189 unknown = mvme16x_parse_bootinfo(record); 190 else if (MACH_IS_MVME147) 191 unknown = mvme147_parse_bootinfo(record); 192 else if (MACH_IS_HP300) 193 unknown = hp300_parse_bootinfo(record); 194 else if (MACH_IS_APOLLO) 195 unknown = apollo_parse_bootinfo(record); 196 else 197 unknown = 1; 198 } 199 if (unknown) 200 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", 201 record->tag); 202 record = (struct bi_record *)((unsigned long)record + 203 record->size); 204 } 205 206 m68k_realnum_memory = m68k_num_memory; 207#ifdef CONFIG_SINGLE_MEMORY_CHUNK 208 if (m68k_num_memory > 1) { 209 printk("Ignoring last %i chunks of physical memory\n", 210 (m68k_num_memory - 1)); 211 m68k_num_memory = 1; 212 } 213#endif 214} 215 216void __init setup_arch(char **cmdline_p) 217{ 218 int i; 219 220 /* The bootinfo is located right after the kernel bss */ 221 m68k_parse_bootinfo((const struct bi_record *)_end); 222 223 if (CPU_IS_040) 224 m68k_is040or060 = 4; 225 else if (CPU_IS_060) 226 m68k_is040or060 = 6; 227 228#ifndef CONFIG_M68KFPU_EMU_ONLY 229 /* clear the fpu if we have one */ 230 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) { 231 volatile int zero = 0; 232 asm volatile ("frestore %0" : : "m" (zero)); 233 } 234#endif 235 236 if (CPU_IS_060) { 237 u32 pcr; 238 239 asm (".chip 68060; movec %%pcr,%0; .chip 68k" 240 : "=d" (pcr)); 241 if (((pcr >> 8) & 0xff) <= 5) { 242 printk("Enabling workaround for errata I14\n"); 243 asm (".chip 68060; movec %0,%%pcr; .chip 68k" 244 : : "d" (pcr | 0x20)); 245 } 246 } 247 248 init_mm.start_code = PAGE_OFFSET; 249 init_mm.end_code = (unsigned long)_etext; 250 init_mm.end_data = (unsigned long)_edata; 251 init_mm.brk = (unsigned long)_end; 252 253 *cmdline_p = m68k_command_line; 254 memcpy(boot_command_line, *cmdline_p, CL_SIZE); 255 256 parse_early_param(); 257 258#ifdef CONFIG_DUMMY_CONSOLE 259 conswitchp = &dummy_con; 260#endif 261 262 switch (m68k_machtype) { 263#ifdef CONFIG_AMIGA 264 case MACH_AMIGA: 265 config_amiga(); 266 break; 267#endif 268#ifdef CONFIG_ATARI 269 case MACH_ATARI: 270 config_atari(); 271 break; 272#endif 273#ifdef CONFIG_MAC 274 case MACH_MAC: 275 config_mac(); 276 break; 277#endif 278#ifdef CONFIG_SUN3 279 case MACH_SUN3: 280 config_sun3(); 281 break; 282#endif 283#ifdef CONFIG_APOLLO 284 case MACH_APOLLO: 285 config_apollo(); 286 break; 287#endif 288#ifdef CONFIG_MVME147 289 case MACH_MVME147: 290 config_mvme147(); 291 break; 292#endif 293#ifdef CONFIG_MVME16x 294 case MACH_MVME16x: 295 config_mvme16x(); 296 break; 297#endif 298#ifdef CONFIG_BVME6000 299 case MACH_BVME6000: 300 config_bvme6000(); 301 break; 302#endif 303#ifdef CONFIG_HP300 304 case MACH_HP300: 305 config_hp300(); 306 break; 307#endif 308#ifdef CONFIG_Q40 309 case MACH_Q40: 310 config_q40(); 311 break; 312#endif 313#ifdef CONFIG_SUN3X 314 case MACH_SUN3X: 315 config_sun3x(); 316 break; 317#endif 318 default: 319 panic("No configuration setup"); 320 } 321 322 paging_init(); 323 324#ifndef CONFIG_SUN3 325 for (i = 1; i < m68k_num_memory; i++) 326 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr, 327 m68k_memory[i].size); 328#ifdef CONFIG_BLK_DEV_INITRD 329 if (m68k_ramdisk.size) { 330 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)), 331 m68k_ramdisk.addr, m68k_ramdisk.size, 332 BOOTMEM_DEFAULT); 333 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); 334 initrd_end = initrd_start + m68k_ramdisk.size; 335 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end); 336 } 337#endif 338 339#ifdef CONFIG_ATARI 340 if (MACH_IS_ATARI) 341 atari_stram_reserve_pages((void *)availmem); 342#endif 343#ifdef CONFIG_SUN3X 344 if (MACH_IS_SUN3X) { 345 dvma_init(); 346 } 347#endif 348 349#endif /* !CONFIG_SUN3 */ 350 351/* set ISA defs early as possible */ 352#if defined(CONFIG_ISA) && defined(MULTI_ISA) 353 if (MACH_IS_Q40) { 354 isa_type = ISA_TYPE_Q40; 355 isa_sex = 0; 356 } 357#ifdef CONFIG_GG2 358 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) { 359 isa_type = ISA_TYPE_GG2; 360 isa_sex = 0; 361 } 362#endif 363#ifdef CONFIG_AMIGA_PCMCIA 364 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { 365 isa_type = ISA_TYPE_AG; 366 isa_sex = 1; 367 } 368#endif 369#endif 370} 371 372static int show_cpuinfo(struct seq_file *m, void *v) 373{ 374 const char *cpu, *mmu, *fpu; 375 unsigned long clockfreq, clockfactor; 376 377#define LOOP_CYCLES_68020 (8) 378#define LOOP_CYCLES_68030 (8) 379#define LOOP_CYCLES_68040 (3) 380#define LOOP_CYCLES_68060 (1) 381 382 if (CPU_IS_020) { 383 cpu = "68020"; 384 clockfactor = LOOP_CYCLES_68020; 385 } else if (CPU_IS_030) { 386 cpu = "68030"; 387 clockfactor = LOOP_CYCLES_68030; 388 } else if (CPU_IS_040) { 389 cpu = "68040"; 390 clockfactor = LOOP_CYCLES_68040; 391 } else if (CPU_IS_060) { 392 cpu = "68060"; 393 clockfactor = LOOP_CYCLES_68060; 394 } else { 395 cpu = "680x0"; 396 clockfactor = 0; 397 } 398 399#ifdef CONFIG_M68KFPU_EMU_ONLY 400 fpu = "none(soft float)"; 401#else 402 if (m68k_fputype & FPU_68881) 403 fpu = "68881"; 404 else if (m68k_fputype & FPU_68882) 405 fpu = "68882"; 406 else if (m68k_fputype & FPU_68040) 407 fpu = "68040"; 408 else if (m68k_fputype & FPU_68060) 409 fpu = "68060"; 410 else if (m68k_fputype & FPU_SUNFPA) 411 fpu = "Sun FPA"; 412 else 413 fpu = "none"; 414#endif 415 416 if (m68k_mmutype & MMU_68851) 417 mmu = "68851"; 418 else if (m68k_mmutype & MMU_68030) 419 mmu = "68030"; 420 else if (m68k_mmutype & MMU_68040) 421 mmu = "68040"; 422 else if (m68k_mmutype & MMU_68060) 423 mmu = "68060"; 424 else if (m68k_mmutype & MMU_SUN3) 425 mmu = "Sun-3"; 426 else if (m68k_mmutype & MMU_APOLLO) 427 mmu = "Apollo"; 428 else 429 mmu = "unknown"; 430 431 clockfreq = loops_per_jiffy * HZ * clockfactor; 432 433 seq_printf(m, "CPU:\t\t%s\n" 434 "MMU:\t\t%s\n" 435 "FPU:\t\t%s\n" 436 "Clocking:\t%lu.%1luMHz\n" 437 "BogoMips:\t%lu.%02lu\n" 438 "Calibration:\t%lu loops\n", 439 cpu, mmu, fpu, 440 clockfreq/1000000,(clockfreq/100000)%10, 441 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, 442 loops_per_jiffy); 443 return 0; 444} 445 446static void *c_start(struct seq_file *m, loff_t *pos) 447{ 448 return *pos < 1 ? (void *)1 : NULL; 449} 450static void *c_next(struct seq_file *m, void *v, loff_t *pos) 451{ 452 ++*pos; 453 return NULL; 454} 455static void c_stop(struct seq_file *m, void *v) 456{ 457} 458const struct seq_operations cpuinfo_op = { 459 .start = c_start, 460 .next = c_next, 461 .stop = c_stop, 462 .show = show_cpuinfo, 463}; 464 465#ifdef CONFIG_PROC_HARDWARE 466static int hardware_proc_show(struct seq_file *m, void *v) 467{ 468 char model[80]; 469 unsigned long mem; 470 int i; 471 472 if (mach_get_model) 473 mach_get_model(model); 474 else 475 strcpy(model, "Unknown m68k"); 476 477 seq_printf(m, "Model:\t\t%s\n", model); 478 for (mem = 0, i = 0; i < m68k_num_memory; i++) 479 mem += m68k_memory[i].size; 480 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); 481 482 if (mach_get_hardware_list) 483 mach_get_hardware_list(m); 484 485 return 0; 486} 487 488static int hardware_proc_open(struct inode *inode, struct file *file) 489{ 490 return single_open(file, hardware_proc_show, NULL); 491} 492 493static const struct file_operations hardware_proc_fops = { 494 .open = hardware_proc_open, 495 .read = seq_read, 496 .llseek = seq_lseek, 497 .release = single_release, 498}; 499 500static int __init proc_hardware_init(void) 501{ 502 proc_create("hardware", 0, NULL, &hardware_proc_fops); 503 return 0; 504} 505module_init(proc_hardware_init); 506#endif 507 508void check_bugs(void) 509{ 510#ifndef CONFIG_M68KFPU_EMU 511 if (m68k_fputype == 0) { 512 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " 513 "WHICH IS REQUIRED BY LINUX/M68K ***\n"); 514 printk(KERN_EMERG "Upgrade your hardware or join the FPU " 515 "emulation project\n"); 516 panic("no FPU"); 517 } 518#endif /* !CONFIG_M68KFPU_EMU */ 519} 520 521#ifdef CONFIG_ADB 522static int __init adb_probe_sync_enable (char *str) { 523 extern int __adb_probe_sync; 524 __adb_probe_sync = 1; 525 return 1; 526} 527 528__setup("adb_sync", adb_probe_sync_enable); 529#endif /* CONFIG_ADB */ 530