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1da177e4 LT |
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 | #if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY) | |
88 | void (*mach_floppy_setup) (char *, int *) __initdata = NULL; | |
89 | #endif | |
90 | #ifdef CONFIG_HEARTBEAT | |
91 | void (*mach_heartbeat) (int); | |
92 | EXPORT_SYMBOL(mach_heartbeat); | |
93 | #endif | |
94 | #ifdef CONFIG_M68K_L2_CACHE | |
95 | void (*mach_l2_flush) (int); | |
96 | #endif | |
97 | #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) | |
98 | void (*mach_beep)(unsigned int, unsigned int); | |
99 | #endif | |
100 | #if defined(CONFIG_ISA) && defined(MULTI_ISA) | |
101 | int isa_type; | |
102 | int isa_sex; | |
103 | #endif | |
104 | ||
105 | extern int amiga_parse_bootinfo(const struct bi_record *); | |
106 | extern int atari_parse_bootinfo(const struct bi_record *); | |
107 | extern int mac_parse_bootinfo(const struct bi_record *); | |
108 | extern int q40_parse_bootinfo(const struct bi_record *); | |
109 | extern int bvme6000_parse_bootinfo(const struct bi_record *); | |
110 | extern int mvme16x_parse_bootinfo(const struct bi_record *); | |
111 | extern int mvme147_parse_bootinfo(const struct bi_record *); | |
112 | extern int hp300_parse_bootinfo(const struct bi_record *); | |
113 | ||
114 | extern void config_amiga(void); | |
115 | extern void config_atari(void); | |
116 | extern void config_mac(void); | |
117 | extern void config_sun3(void); | |
118 | extern void config_apollo(void); | |
119 | extern void config_mvme147(void); | |
120 | extern void config_mvme16x(void); | |
121 | extern void config_bvme6000(void); | |
122 | extern void config_hp300(void); | |
123 | extern void config_q40(void); | |
124 | extern void config_sun3x(void); | |
125 | ||
126 | extern void mac_debugging_short (int, short); | |
127 | extern void mac_debugging_long (int, long); | |
128 | ||
129 | #define MASK_256K 0xfffc0000 | |
130 | ||
131 | extern void paging_init(void); | |
132 | ||
133 | static void __init m68k_parse_bootinfo(const struct bi_record *record) | |
134 | { | |
135 | while (record->tag != BI_LAST) { | |
136 | int unknown = 0; | |
137 | const unsigned long *data = record->data; | |
138 | switch (record->tag) { | |
139 | case BI_MACHTYPE: | |
140 | case BI_CPUTYPE: | |
141 | case BI_FPUTYPE: | |
142 | case BI_MMUTYPE: | |
143 | /* Already set up by head.S */ | |
144 | break; | |
145 | ||
146 | case BI_MEMCHUNK: | |
147 | if (m68k_num_memory < NUM_MEMINFO) { | |
148 | m68k_memory[m68k_num_memory].addr = data[0]; | |
149 | m68k_memory[m68k_num_memory].size = data[1]; | |
150 | m68k_num_memory++; | |
151 | } else | |
152 | printk("m68k_parse_bootinfo: too many memory chunks\n"); | |
153 | break; | |
154 | ||
155 | case BI_RAMDISK: | |
156 | m68k_ramdisk.addr = data[0]; | |
157 | m68k_ramdisk.size = data[1]; | |
158 | break; | |
159 | ||
160 | case BI_COMMAND_LINE: | |
161 | strlcpy(m68k_command_line, (const char *)data, sizeof(m68k_command_line)); | |
162 | break; | |
163 | ||
164 | default: | |
165 | if (MACH_IS_AMIGA) | |
166 | unknown = amiga_parse_bootinfo(record); | |
167 | else if (MACH_IS_ATARI) | |
168 | unknown = atari_parse_bootinfo(record); | |
169 | else if (MACH_IS_MAC) | |
170 | unknown = mac_parse_bootinfo(record); | |
171 | else if (MACH_IS_Q40) | |
172 | unknown = q40_parse_bootinfo(record); | |
173 | else if (MACH_IS_BVME6000) | |
174 | unknown = bvme6000_parse_bootinfo(record); | |
175 | else if (MACH_IS_MVME16x) | |
176 | unknown = mvme16x_parse_bootinfo(record); | |
177 | else if (MACH_IS_MVME147) | |
178 | unknown = mvme147_parse_bootinfo(record); | |
179 | else if (MACH_IS_HP300) | |
180 | unknown = hp300_parse_bootinfo(record); | |
181 | else | |
182 | unknown = 1; | |
183 | } | |
184 | if (unknown) | |
185 | printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", | |
186 | record->tag); | |
187 | record = (struct bi_record *)((unsigned long)record+record->size); | |
188 | } | |
189 | ||
190 | m68k_realnum_memory = m68k_num_memory; | |
191 | #ifdef CONFIG_SINGLE_MEMORY_CHUNK | |
192 | if (m68k_num_memory > 1) { | |
193 | printk("Ignoring last %i chunks of physical memory\n", | |
194 | (m68k_num_memory - 1)); | |
195 | m68k_num_memory = 1; | |
196 | } | |
197 | m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET; | |
198 | #endif | |
199 | } | |
200 | ||
201 | void __init setup_arch(char **cmdline_p) | |
202 | { | |
203 | extern int _etext, _edata, _end; | |
204 | #ifndef CONFIG_SUN3 | |
205 | unsigned long endmem, startmem; | |
206 | #endif | |
207 | int i; | |
208 | char *p, *q; | |
209 | ||
210 | /* The bootinfo is located right after the kernel bss */ | |
211 | m68k_parse_bootinfo((const struct bi_record *)&_end); | |
212 | ||
213 | if (CPU_IS_040) | |
214 | m68k_is040or060 = 4; | |
215 | else if (CPU_IS_060) | |
216 | m68k_is040or060 = 6; | |
217 | ||
218 | /* FIXME: m68k_fputype is passed in by Penguin booter, which can | |
219 | * be confused by software FPU emulation. BEWARE. | |
220 | * We should really do our own FPU check at startup. | |
221 | * [what do we do with buggy 68LC040s? if we have problems | |
222 | * with them, we should add a test to check_bugs() below] */ | |
223 | #ifndef CONFIG_M68KFPU_EMU_ONLY | |
224 | /* clear the fpu if we have one */ | |
225 | if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) { | |
226 | volatile int zero = 0; | |
227 | asm __volatile__ ("frestore %0" : : "m" (zero)); | |
228 | } | |
229 | #endif | |
230 | ||
231 | if (CPU_IS_060) { | |
232 | u32 pcr; | |
233 | ||
234 | asm (".chip 68060; movec %%pcr,%0; .chip 68k" | |
235 | : "=d" (pcr)); | |
236 | if (((pcr >> 8) & 0xff) <= 5) { | |
237 | printk("Enabling workaround for errata I14\n"); | |
238 | asm (".chip 68060; movec %0,%%pcr; .chip 68k" | |
239 | : : "d" (pcr | 0x20)); | |
240 | } | |
241 | } | |
242 | ||
243 | init_mm.start_code = PAGE_OFFSET; | |
244 | init_mm.end_code = (unsigned long) &_etext; | |
245 | init_mm.end_data = (unsigned long) &_edata; | |
246 | init_mm.brk = (unsigned long) &_end; | |
247 | ||
248 | *cmdline_p = m68k_command_line; | |
249 | memcpy(saved_command_line, *cmdline_p, CL_SIZE); | |
250 | ||
251 | /* Parse the command line for arch-specific options. | |
252 | * For the m68k, this is currently only "debug=xxx" to enable printing | |
253 | * certain kernel messages to some machine-specific device. | |
254 | */ | |
255 | for( p = *cmdline_p; p && *p; ) { | |
256 | i = 0; | |
257 | if (!strncmp( p, "debug=", 6 )) { | |
258 | strlcpy( m68k_debug_device, p+6, sizeof(m68k_debug_device) ); | |
259 | if ((q = strchr( m68k_debug_device, ' ' ))) *q = 0; | |
260 | i = 1; | |
261 | } | |
262 | #ifdef CONFIG_ATARI | |
263 | /* This option must be parsed very early */ | |
264 | if (!strncmp( p, "switches=", 9 )) { | |
265 | extern void atari_switches_setup( const char *, int ); | |
266 | atari_switches_setup( p+9, (q = strchr( p+9, ' ' )) ? | |
267 | (q - (p+9)) : strlen(p+9) ); | |
268 | i = 1; | |
269 | } | |
270 | #endif | |
271 | ||
272 | if (i) { | |
273 | /* option processed, delete it */ | |
274 | if ((q = strchr( p, ' ' ))) | |
275 | strcpy( p, q+1 ); | |
276 | else | |
277 | *p = 0; | |
278 | } else { | |
279 | if ((p = strchr( p, ' ' ))) ++p; | |
280 | } | |
281 | } | |
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 | ||
525 | #if defined(CONFIG_AMIGA_FLOPPY) || defined(CONFIG_ATARI_FLOPPY) | |
526 | void __init floppy_setup(char *str, int *ints) | |
527 | { | |
528 | if (mach_floppy_setup) | |
529 | mach_floppy_setup (str, ints); | |
530 | } | |
531 | ||
532 | #endif | |
533 | ||
534 | void check_bugs(void) | |
535 | { | |
536 | #ifndef CONFIG_M68KFPU_EMU | |
537 | if (m68k_fputype == 0) { | |
538 | printk( KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " | |
539 | "WHICH IS REQUIRED BY LINUX/M68K ***\n" ); | |
540 | printk( KERN_EMERG "Upgrade your hardware or join the FPU " | |
541 | "emulation project\n" ); | |
542 | panic( "no FPU" ); | |
543 | } | |
544 | #endif /* !CONFIG_M68KFPU_EMU */ | |
545 | } |