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/byteorder.h>
30 #include <asm/sections.h>
31 #include <asm/setup.h>
32 #include <asm/fpu.h>
33 #include <asm/irq.h>
34 #include <asm/io.h>
35 #include <asm/machdep.h>
36 #ifdef CONFIG_AMIGA
37 #include <asm/amigahw.h>
38 #endif
39 #ifdef CONFIG_ATARI
40 #include <asm/atarihw.h>
41 #include <asm/atari_stram.h>
42 #endif
43 #ifdef CONFIG_SUN3X
44 #include <asm/dvma.h>
45 #endif
46 #include <asm/natfeat.h>
47
48 #if !FPSTATESIZE || !NR_IRQS
49 #warning No CPU/platform type selected, your kernel will not work!
50 #warning Are you building an allnoconfig kernel?
51 #endif
52
53 unsigned long m68k_machtype;
54 EXPORT_SYMBOL(m68k_machtype);
55 unsigned long m68k_cputype;
56 EXPORT_SYMBOL(m68k_cputype);
57 unsigned long m68k_fputype;
58 unsigned long m68k_mmutype;
59 EXPORT_SYMBOL(m68k_mmutype);
60 #ifdef CONFIG_VME
61 unsigned long vme_brdtype;
62 EXPORT_SYMBOL(vme_brdtype);
63 #endif
64
65 int m68k_is040or060;
66 EXPORT_SYMBOL(m68k_is040or060);
67
68 extern unsigned long availmem;
69
70 int m68k_num_memory;
71 EXPORT_SYMBOL(m68k_num_memory);
72 int m68k_realnum_memory;
73 EXPORT_SYMBOL(m68k_realnum_memory);
74 unsigned long m68k_memoffset;
75 struct m68k_mem_info m68k_memory[NUM_MEMINFO];
76 EXPORT_SYMBOL(m68k_memory);
77
78 static struct m68k_mem_info m68k_ramdisk __initdata;
79
80 static char m68k_command_line[CL_SIZE] __initdata;
81
82 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
83 /* machine dependent irq functions */
84 void (*mach_init_IRQ) (void) __initdata = NULL;
85 void (*mach_get_model) (char *model);
86 void (*mach_get_hardware_list) (struct seq_file *m);
87 /* machine dependent timer functions */
88 int (*mach_hwclk) (int, struct rtc_time*);
89 EXPORT_SYMBOL(mach_hwclk);
90 int (*mach_set_clock_mmss) (unsigned long);
91 unsigned int (*mach_get_ss)(void);
92 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
93 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
94 EXPORT_SYMBOL(mach_get_ss);
95 EXPORT_SYMBOL(mach_get_rtc_pll);
96 EXPORT_SYMBOL(mach_set_rtc_pll);
97 void (*mach_reset)( void );
98 void (*mach_halt)( void );
99 void (*mach_power_off)( void );
100 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
101 #ifdef CONFIG_HEARTBEAT
102 void (*mach_heartbeat) (int);
103 EXPORT_SYMBOL(mach_heartbeat);
104 #endif
105 #ifdef CONFIG_M68K_L2_CACHE
106 void (*mach_l2_flush) (int);
107 #endif
108 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
109 void (*mach_beep)(unsigned int, unsigned int);
110 EXPORT_SYMBOL(mach_beep);
111 #endif
112 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
113 int isa_type;
114 int isa_sex;
115 EXPORT_SYMBOL(isa_type);
116 EXPORT_SYMBOL(isa_sex);
117 #endif
118
119 extern int amiga_parse_bootinfo(const struct bi_record *);
120 extern int atari_parse_bootinfo(const struct bi_record *);
121 extern int mac_parse_bootinfo(const struct bi_record *);
122 extern int q40_parse_bootinfo(const struct bi_record *);
123 extern int bvme6000_parse_bootinfo(const struct bi_record *);
124 extern int mvme16x_parse_bootinfo(const struct bi_record *);
125 extern int mvme147_parse_bootinfo(const struct bi_record *);
126 extern int hp300_parse_bootinfo(const struct bi_record *);
127 extern int apollo_parse_bootinfo(const struct bi_record *);
128
129 extern void config_amiga(void);
130 extern void config_atari(void);
131 extern void config_mac(void);
132 extern void config_sun3(void);
133 extern void config_apollo(void);
134 extern void config_mvme147(void);
135 extern void config_mvme16x(void);
136 extern void config_bvme6000(void);
137 extern void config_hp300(void);
138 extern void config_q40(void);
139 extern void config_sun3x(void);
140
141 #define MASK_256K 0xfffc0000
142
143 extern void paging_init(void);
144
m68k_parse_bootinfo(const struct bi_record * record)145 static void __init m68k_parse_bootinfo(const struct bi_record *record)
146 {
147 uint16_t tag;
148
149 save_bootinfo(record);
150
151 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
152 int unknown = 0;
153 const void *data = record->data;
154 uint16_t size = be16_to_cpu(record->size);
155
156 switch (tag) {
157 case BI_MACHTYPE:
158 case BI_CPUTYPE:
159 case BI_FPUTYPE:
160 case BI_MMUTYPE:
161 /* Already set up by head.S */
162 break;
163
164 case BI_MEMCHUNK:
165 if (m68k_num_memory < NUM_MEMINFO) {
166 const struct mem_info *m = data;
167 m68k_memory[m68k_num_memory].addr =
168 be32_to_cpu(m->addr);
169 m68k_memory[m68k_num_memory].size =
170 be32_to_cpu(m->size);
171 m68k_num_memory++;
172 } else
173 pr_warn("%s: too many memory chunks\n",
174 __func__);
175 break;
176
177 case BI_RAMDISK:
178 {
179 const struct mem_info *m = data;
180 m68k_ramdisk.addr = be32_to_cpu(m->addr);
181 m68k_ramdisk.size = be32_to_cpu(m->size);
182 }
183 break;
184
185 case BI_COMMAND_LINE:
186 strlcpy(m68k_command_line, data,
187 sizeof(m68k_command_line));
188 break;
189
190 default:
191 if (MACH_IS_AMIGA)
192 unknown = amiga_parse_bootinfo(record);
193 else if (MACH_IS_ATARI)
194 unknown = atari_parse_bootinfo(record);
195 else if (MACH_IS_MAC)
196 unknown = mac_parse_bootinfo(record);
197 else if (MACH_IS_Q40)
198 unknown = q40_parse_bootinfo(record);
199 else if (MACH_IS_BVME6000)
200 unknown = bvme6000_parse_bootinfo(record);
201 else if (MACH_IS_MVME16x)
202 unknown = mvme16x_parse_bootinfo(record);
203 else if (MACH_IS_MVME147)
204 unknown = mvme147_parse_bootinfo(record);
205 else if (MACH_IS_HP300)
206 unknown = hp300_parse_bootinfo(record);
207 else if (MACH_IS_APOLLO)
208 unknown = apollo_parse_bootinfo(record);
209 else
210 unknown = 1;
211 }
212 if (unknown)
213 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
214 tag);
215 record = (struct bi_record *)((unsigned long)record + size);
216 }
217
218 m68k_realnum_memory = m68k_num_memory;
219 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
220 if (m68k_num_memory > 1) {
221 pr_warn("%s: ignoring last %i chunks of physical memory\n",
222 __func__, (m68k_num_memory - 1));
223 m68k_num_memory = 1;
224 }
225 #endif
226 }
227
setup_arch(char ** cmdline_p)228 void __init setup_arch(char **cmdline_p)
229 {
230 #ifndef CONFIG_SUN3
231 int i;
232 #endif
233
234 /* The bootinfo is located right after the kernel */
235 if (!CPU_IS_COLDFIRE)
236 m68k_parse_bootinfo((const struct bi_record *)_end);
237
238 if (CPU_IS_040)
239 m68k_is040or060 = 4;
240 else if (CPU_IS_060)
241 m68k_is040or060 = 6;
242
243 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
244 * be confused by software FPU emulation. BEWARE.
245 * We should really do our own FPU check at startup.
246 * [what do we do with buggy 68LC040s? if we have problems
247 * with them, we should add a test to check_bugs() below] */
248 #ifndef CONFIG_M68KFPU_EMU_ONLY
249 /* clear the fpu if we have one */
250 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
251 volatile int zero = 0;
252 asm volatile ("frestore %0" : : "m" (zero));
253 }
254 #endif
255
256 if (CPU_IS_060) {
257 u32 pcr;
258
259 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
260 : "=d" (pcr));
261 if (((pcr >> 8) & 0xff) <= 5) {
262 pr_warn("Enabling workaround for errata I14\n");
263 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
264 : : "d" (pcr | 0x20));
265 }
266 }
267
268 init_mm.start_code = PAGE_OFFSET;
269 init_mm.end_code = (unsigned long)_etext;
270 init_mm.end_data = (unsigned long)_edata;
271 init_mm.brk = (unsigned long)_end;
272
273 #if defined(CONFIG_BOOTPARAM)
274 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
275 m68k_command_line[CL_SIZE - 1] = 0;
276 #endif /* CONFIG_BOOTPARAM */
277 *cmdline_p = m68k_command_line;
278 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
279
280 parse_early_param();
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 #ifdef CONFIG_COLDFIRE
343 case MACH_M54XX:
344 config_BSP(NULL, 0);
345 break;
346 #endif
347 default:
348 panic("No configuration setup");
349 }
350
351 paging_init();
352
353 #ifdef CONFIG_NATFEAT
354 nf_init();
355 #endif
356
357 #ifndef CONFIG_SUN3
358 for (i = 1; i < m68k_num_memory; i++)
359 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
360 m68k_memory[i].size);
361 #ifdef CONFIG_BLK_DEV_INITRD
362 if (m68k_ramdisk.size) {
363 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
364 m68k_ramdisk.addr, m68k_ramdisk.size,
365 BOOTMEM_DEFAULT);
366 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
367 initrd_end = initrd_start + m68k_ramdisk.size;
368 pr_info("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 /* set ISA defs early as possible */
385 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
386 if (MACH_IS_Q40) {
387 isa_type = ISA_TYPE_Q40;
388 isa_sex = 0;
389 }
390 #ifdef CONFIG_AMIGA_PCMCIA
391 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
392 isa_type = ISA_TYPE_AG;
393 isa_sex = 1;
394 }
395 #endif
396 #ifdef CONFIG_ATARI_ROM_ISA
397 if (MACH_IS_ATARI) {
398 isa_type = ISA_TYPE_ENEC;
399 isa_sex = 0;
400 }
401 #endif
402 #endif
403 }
404
show_cpuinfo(struct seq_file * m,void * v)405 static int show_cpuinfo(struct seq_file *m, void *v)
406 {
407 const char *cpu, *mmu, *fpu;
408 unsigned long clockfreq, clockfactor;
409
410 #define LOOP_CYCLES_68020 (8)
411 #define LOOP_CYCLES_68030 (8)
412 #define LOOP_CYCLES_68040 (3)
413 #define LOOP_CYCLES_68060 (1)
414 #define LOOP_CYCLES_COLDFIRE (2)
415
416 if (CPU_IS_020) {
417 cpu = "68020";
418 clockfactor = LOOP_CYCLES_68020;
419 } else if (CPU_IS_030) {
420 cpu = "68030";
421 clockfactor = LOOP_CYCLES_68030;
422 } else if (CPU_IS_040) {
423 cpu = "68040";
424 clockfactor = LOOP_CYCLES_68040;
425 } else if (CPU_IS_060) {
426 cpu = "68060";
427 clockfactor = LOOP_CYCLES_68060;
428 } else if (CPU_IS_COLDFIRE) {
429 cpu = "ColdFire";
430 clockfactor = LOOP_CYCLES_COLDFIRE;
431 } else {
432 cpu = "680x0";
433 clockfactor = 0;
434 }
435
436 #ifdef CONFIG_M68KFPU_EMU_ONLY
437 fpu = "none(soft float)";
438 #else
439 if (m68k_fputype & FPU_68881)
440 fpu = "68881";
441 else if (m68k_fputype & FPU_68882)
442 fpu = "68882";
443 else if (m68k_fputype & FPU_68040)
444 fpu = "68040";
445 else if (m68k_fputype & FPU_68060)
446 fpu = "68060";
447 else if (m68k_fputype & FPU_SUNFPA)
448 fpu = "Sun FPA";
449 else if (m68k_fputype & FPU_COLDFIRE)
450 fpu = "ColdFire";
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 if (m68k_mmutype & MMU_COLDFIRE)
468 mmu = "ColdFire";
469 else
470 mmu = "unknown";
471
472 clockfreq = loops_per_jiffy * HZ * clockfactor;
473
474 seq_printf(m, "CPU:\t\t%s\n"
475 "MMU:\t\t%s\n"
476 "FPU:\t\t%s\n"
477 "Clocking:\t%lu.%1luMHz\n"
478 "BogoMips:\t%lu.%02lu\n"
479 "Calibration:\t%lu loops\n",
480 cpu, mmu, fpu,
481 clockfreq/1000000,(clockfreq/100000)%10,
482 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
483 loops_per_jiffy);
484 return 0;
485 }
486
c_start(struct seq_file * m,loff_t * pos)487 static void *c_start(struct seq_file *m, loff_t *pos)
488 {
489 return *pos < 1 ? (void *)1 : NULL;
490 }
c_next(struct seq_file * m,void * v,loff_t * pos)491 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
492 {
493 ++*pos;
494 return NULL;
495 }
c_stop(struct seq_file * m,void * v)496 static void c_stop(struct seq_file *m, void *v)
497 {
498 }
499 const struct seq_operations cpuinfo_op = {
500 .start = c_start,
501 .next = c_next,
502 .stop = c_stop,
503 .show = show_cpuinfo,
504 };
505
506 #ifdef CONFIG_PROC_HARDWARE
hardware_proc_show(struct seq_file * m,void * v)507 static int hardware_proc_show(struct seq_file *m, void *v)
508 {
509 char model[80];
510 unsigned long mem;
511 int i;
512
513 if (mach_get_model)
514 mach_get_model(model);
515 else
516 strcpy(model, "Unknown m68k");
517
518 seq_printf(m, "Model:\t\t%s\n", model);
519 for (mem = 0, i = 0; i < m68k_num_memory; i++)
520 mem += m68k_memory[i].size;
521 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
522
523 if (mach_get_hardware_list)
524 mach_get_hardware_list(m);
525
526 return 0;
527 }
528
hardware_proc_open(struct inode * inode,struct file * file)529 static int hardware_proc_open(struct inode *inode, struct file *file)
530 {
531 return single_open(file, hardware_proc_show, NULL);
532 }
533
534 static const struct file_operations hardware_proc_fops = {
535 .open = hardware_proc_open,
536 .read = seq_read,
537 .llseek = seq_lseek,
538 .release = single_release,
539 };
540
proc_hardware_init(void)541 static int __init proc_hardware_init(void)
542 {
543 proc_create("hardware", 0, NULL, &hardware_proc_fops);
544 return 0;
545 }
546 module_init(proc_hardware_init);
547 #endif
548
check_bugs(void)549 void check_bugs(void)
550 {
551 #ifndef CONFIG_M68KFPU_EMU
552 if (m68k_fputype == 0) {
553 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
554 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
555 pr_emerg("Upgrade your hardware or join the FPU "
556 "emulation project\n");
557 panic("no FPU");
558 }
559 #endif /* !CONFIG_M68KFPU_EMU */
560 }
561
562 #ifdef CONFIG_ADB
adb_probe_sync_enable(char * str)563 static int __init adb_probe_sync_enable (char *str) {
564 extern int __adb_probe_sync;
565 __adb_probe_sync = 1;
566 return 1;
567 }
568
569 __setup("adb_sync", adb_probe_sync_enable);
570 #endif /* CONFIG_ADB */
571