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 #include <asm/natfeat.h>
46
47 #if !FPSTATESIZE || !NR_IRQS
48 #warning No CPU/platform type selected, your kernel will not work!
49 #warning Are you building an allnoconfig kernel?
50 #endif
51
52 unsigned long m68k_machtype;
53 EXPORT_SYMBOL(m68k_machtype);
54 unsigned long m68k_cputype;
55 EXPORT_SYMBOL(m68k_cputype);
56 unsigned long m68k_fputype;
57 unsigned long m68k_mmutype;
58 EXPORT_SYMBOL(m68k_mmutype);
59 #ifdef CONFIG_VME
60 unsigned long vme_brdtype;
61 EXPORT_SYMBOL(vme_brdtype);
62 #endif
63
64 int m68k_is040or060;
65 EXPORT_SYMBOL(m68k_is040or060);
66
67 extern unsigned long availmem;
68
69 int m68k_num_memory;
70 EXPORT_SYMBOL(m68k_num_memory);
71 int m68k_realnum_memory;
72 EXPORT_SYMBOL(m68k_realnum_memory);
73 unsigned long m68k_memoffset;
74 struct mem_info m68k_memory[NUM_MEMINFO];
75 EXPORT_SYMBOL(m68k_memory);
76
77 struct mem_info m68k_ramdisk;
78
79 static char m68k_command_line[CL_SIZE];
80
81 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
82 /* machine dependent irq functions */
83 void (*mach_init_IRQ) (void) __initdata = NULL;
84 void (*mach_get_model) (char *model);
85 void (*mach_get_hardware_list) (struct seq_file *m);
86 /* machine dependent timer functions */
87 unsigned long (*mach_gettimeoffset) (void);
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 while (record->tag != BI_LAST) {
148 int unknown = 0;
149 const unsigned long *data = record->data;
150
151 switch (record->tag) {
152 case BI_MACHTYPE:
153 case BI_CPUTYPE:
154 case BI_FPUTYPE:
155 case BI_MMUTYPE:
156 /* Already set up by head.S */
157 break;
158
159 case BI_MEMCHUNK:
160 if (m68k_num_memory < NUM_MEMINFO) {
161 m68k_memory[m68k_num_memory].addr = data[0];
162 m68k_memory[m68k_num_memory].size = data[1];
163 m68k_num_memory++;
164 } else
165 printk("m68k_parse_bootinfo: too many memory chunks\n");
166 break;
167
168 case BI_RAMDISK:
169 m68k_ramdisk.addr = data[0];
170 m68k_ramdisk.size = data[1];
171 break;
172
173 case BI_COMMAND_LINE:
174 strlcpy(m68k_command_line, (const char *)data,
175 sizeof(m68k_command_line));
176 break;
177
178 default:
179 if (MACH_IS_AMIGA)
180 unknown = amiga_parse_bootinfo(record);
181 else if (MACH_IS_ATARI)
182 unknown = atari_parse_bootinfo(record);
183 else if (MACH_IS_MAC)
184 unknown = mac_parse_bootinfo(record);
185 else if (MACH_IS_Q40)
186 unknown = q40_parse_bootinfo(record);
187 else if (MACH_IS_BVME6000)
188 unknown = bvme6000_parse_bootinfo(record);
189 else if (MACH_IS_MVME16x)
190 unknown = mvme16x_parse_bootinfo(record);
191 else if (MACH_IS_MVME147)
192 unknown = mvme147_parse_bootinfo(record);
193 else if (MACH_IS_HP300)
194 unknown = hp300_parse_bootinfo(record);
195 else if (MACH_IS_APOLLO)
196 unknown = apollo_parse_bootinfo(record);
197 else
198 unknown = 1;
199 }
200 if (unknown)
201 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
202 record->tag);
203 record = (struct bi_record *)((unsigned long)record +
204 record->size);
205 }
206
207 m68k_realnum_memory = m68k_num_memory;
208 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
209 if (m68k_num_memory > 1) {
210 printk("Ignoring last %i chunks of physical memory\n",
211 (m68k_num_memory - 1));
212 m68k_num_memory = 1;
213 }
214 #endif
215 }
216
setup_arch(char ** cmdline_p)217 void __init setup_arch(char **cmdline_p)
218 {
219 #ifndef CONFIG_SUN3
220 int i;
221 #endif
222
223 /* The bootinfo is located right after the kernel bss */
224 if (!CPU_IS_COLDFIRE)
225 m68k_parse_bootinfo((const struct bi_record *)_end);
226
227 if (CPU_IS_040)
228 m68k_is040or060 = 4;
229 else if (CPU_IS_060)
230 m68k_is040or060 = 6;
231
232 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
233 * be confused by software FPU emulation. BEWARE.
234 * We should really do our own FPU check at startup.
235 * [what do we do with buggy 68LC040s? if we have problems
236 * with them, we should add a test to check_bugs() below] */
237 #ifndef CONFIG_M68KFPU_EMU_ONLY
238 /* clear the fpu if we have one */
239 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
240 volatile int zero = 0;
241 asm volatile ("frestore %0" : : "m" (zero));
242 }
243 #endif
244
245 if (CPU_IS_060) {
246 u32 pcr;
247
248 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
249 : "=d" (pcr));
250 if (((pcr >> 8) & 0xff) <= 5) {
251 printk("Enabling workaround for errata I14\n");
252 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
253 : : "d" (pcr | 0x20));
254 }
255 }
256
257 init_mm.start_code = PAGE_OFFSET;
258 init_mm.end_code = (unsigned long)_etext;
259 init_mm.end_data = (unsigned long)_edata;
260 init_mm.brk = (unsigned long)_end;
261
262 #if defined(CONFIG_BOOTPARAM)
263 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
264 m68k_command_line[CL_SIZE - 1] = 0;
265 #endif /* CONFIG_BOOTPARAM */
266 *cmdline_p = m68k_command_line;
267 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
268
269 parse_early_param();
270
271 #ifdef CONFIG_DUMMY_CONSOLE
272 conswitchp = &dummy_con;
273 #endif
274
275 switch (m68k_machtype) {
276 #ifdef CONFIG_AMIGA
277 case MACH_AMIGA:
278 config_amiga();
279 break;
280 #endif
281 #ifdef CONFIG_ATARI
282 case MACH_ATARI:
283 config_atari();
284 break;
285 #endif
286 #ifdef CONFIG_MAC
287 case MACH_MAC:
288 config_mac();
289 break;
290 #endif
291 #ifdef CONFIG_SUN3
292 case MACH_SUN3:
293 config_sun3();
294 break;
295 #endif
296 #ifdef CONFIG_APOLLO
297 case MACH_APOLLO:
298 config_apollo();
299 break;
300 #endif
301 #ifdef CONFIG_MVME147
302 case MACH_MVME147:
303 config_mvme147();
304 break;
305 #endif
306 #ifdef CONFIG_MVME16x
307 case MACH_MVME16x:
308 config_mvme16x();
309 break;
310 #endif
311 #ifdef CONFIG_BVME6000
312 case MACH_BVME6000:
313 config_bvme6000();
314 break;
315 #endif
316 #ifdef CONFIG_HP300
317 case MACH_HP300:
318 config_hp300();
319 break;
320 #endif
321 #ifdef CONFIG_Q40
322 case MACH_Q40:
323 config_q40();
324 break;
325 #endif
326 #ifdef CONFIG_SUN3X
327 case MACH_SUN3X:
328 config_sun3x();
329 break;
330 #endif
331 #ifdef CONFIG_COLDFIRE
332 case MACH_M54XX:
333 config_BSP(NULL, 0);
334 break;
335 #endif
336 default:
337 panic("No configuration setup");
338 }
339
340 #ifdef CONFIG_NATFEAT
341 nf_init();
342 #endif
343
344 paging_init();
345
346 #ifndef CONFIG_SUN3
347 for (i = 1; i < m68k_num_memory; i++)
348 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
349 m68k_memory[i].size);
350 #ifdef CONFIG_BLK_DEV_INITRD
351 if (m68k_ramdisk.size) {
352 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
353 m68k_ramdisk.addr, m68k_ramdisk.size,
354 BOOTMEM_DEFAULT);
355 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
356 initrd_end = initrd_start + m68k_ramdisk.size;
357 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
358 }
359 #endif
360
361 #ifdef CONFIG_ATARI
362 if (MACH_IS_ATARI)
363 atari_stram_reserve_pages((void *)availmem);
364 #endif
365 #ifdef CONFIG_SUN3X
366 if (MACH_IS_SUN3X) {
367 dvma_init();
368 }
369 #endif
370
371 #endif /* !CONFIG_SUN3 */
372
373 /* set ISA defs early as possible */
374 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
375 if (MACH_IS_Q40) {
376 isa_type = ISA_TYPE_Q40;
377 isa_sex = 0;
378 }
379 #ifdef CONFIG_AMIGA_PCMCIA
380 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
381 isa_type = ISA_TYPE_AG;
382 isa_sex = 1;
383 }
384 #endif
385 #endif
386 }
387
show_cpuinfo(struct seq_file * m,void * v)388 static int show_cpuinfo(struct seq_file *m, void *v)
389 {
390 const char *cpu, *mmu, *fpu;
391 unsigned long clockfreq, clockfactor;
392
393 #define LOOP_CYCLES_68020 (8)
394 #define LOOP_CYCLES_68030 (8)
395 #define LOOP_CYCLES_68040 (3)
396 #define LOOP_CYCLES_68060 (1)
397 #define LOOP_CYCLES_COLDFIRE (2)
398
399 if (CPU_IS_020) {
400 cpu = "68020";
401 clockfactor = LOOP_CYCLES_68020;
402 } else if (CPU_IS_030) {
403 cpu = "68030";
404 clockfactor = LOOP_CYCLES_68030;
405 } else if (CPU_IS_040) {
406 cpu = "68040";
407 clockfactor = LOOP_CYCLES_68040;
408 } else if (CPU_IS_060) {
409 cpu = "68060";
410 clockfactor = LOOP_CYCLES_68060;
411 } else if (CPU_IS_COLDFIRE) {
412 cpu = "ColdFire";
413 clockfactor = LOOP_CYCLES_COLDFIRE;
414 } else {
415 cpu = "680x0";
416 clockfactor = 0;
417 }
418
419 #ifdef CONFIG_M68KFPU_EMU_ONLY
420 fpu = "none(soft float)";
421 #else
422 if (m68k_fputype & FPU_68881)
423 fpu = "68881";
424 else if (m68k_fputype & FPU_68882)
425 fpu = "68882";
426 else if (m68k_fputype & FPU_68040)
427 fpu = "68040";
428 else if (m68k_fputype & FPU_68060)
429 fpu = "68060";
430 else if (m68k_fputype & FPU_SUNFPA)
431 fpu = "Sun FPA";
432 else if (m68k_fputype & FPU_COLDFIRE)
433 fpu = "ColdFire";
434 else
435 fpu = "none";
436 #endif
437
438 if (m68k_mmutype & MMU_68851)
439 mmu = "68851";
440 else if (m68k_mmutype & MMU_68030)
441 mmu = "68030";
442 else if (m68k_mmutype & MMU_68040)
443 mmu = "68040";
444 else if (m68k_mmutype & MMU_68060)
445 mmu = "68060";
446 else if (m68k_mmutype & MMU_SUN3)
447 mmu = "Sun-3";
448 else if (m68k_mmutype & MMU_APOLLO)
449 mmu = "Apollo";
450 else if (m68k_mmutype & MMU_COLDFIRE)
451 mmu = "ColdFire";
452 else
453 mmu = "unknown";
454
455 clockfreq = loops_per_jiffy * HZ * clockfactor;
456
457 seq_printf(m, "CPU:\t\t%s\n"
458 "MMU:\t\t%s\n"
459 "FPU:\t\t%s\n"
460 "Clocking:\t%lu.%1luMHz\n"
461 "BogoMips:\t%lu.%02lu\n"
462 "Calibration:\t%lu loops\n",
463 cpu, mmu, fpu,
464 clockfreq/1000000,(clockfreq/100000)%10,
465 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
466 loops_per_jiffy);
467 return 0;
468 }
469
c_start(struct seq_file * m,loff_t * pos)470 static void *c_start(struct seq_file *m, loff_t *pos)
471 {
472 return *pos < 1 ? (void *)1 : NULL;
473 }
c_next(struct seq_file * m,void * v,loff_t * pos)474 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
475 {
476 ++*pos;
477 return NULL;
478 }
c_stop(struct seq_file * m,void * v)479 static void c_stop(struct seq_file *m, void *v)
480 {
481 }
482 const struct seq_operations cpuinfo_op = {
483 .start = c_start,
484 .next = c_next,
485 .stop = c_stop,
486 .show = show_cpuinfo,
487 };
488
489 #ifdef CONFIG_PROC_HARDWARE
hardware_proc_show(struct seq_file * m,void * v)490 static int hardware_proc_show(struct seq_file *m, void *v)
491 {
492 char model[80];
493 unsigned long mem;
494 int i;
495
496 if (mach_get_model)
497 mach_get_model(model);
498 else
499 strcpy(model, "Unknown m68k");
500
501 seq_printf(m, "Model:\t\t%s\n", model);
502 for (mem = 0, i = 0; i < m68k_num_memory; i++)
503 mem += m68k_memory[i].size;
504 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
505
506 if (mach_get_hardware_list)
507 mach_get_hardware_list(m);
508
509 return 0;
510 }
511
hardware_proc_open(struct inode * inode,struct file * file)512 static int hardware_proc_open(struct inode *inode, struct file *file)
513 {
514 return single_open(file, hardware_proc_show, NULL);
515 }
516
517 static const struct file_operations hardware_proc_fops = {
518 .open = hardware_proc_open,
519 .read = seq_read,
520 .llseek = seq_lseek,
521 .release = single_release,
522 };
523
proc_hardware_init(void)524 static int __init proc_hardware_init(void)
525 {
526 proc_create("hardware", 0, NULL, &hardware_proc_fops);
527 return 0;
528 }
529 module_init(proc_hardware_init);
530 #endif
531
check_bugs(void)532 void check_bugs(void)
533 {
534 #ifndef CONFIG_M68KFPU_EMU
535 if (m68k_fputype == 0) {
536 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
537 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
538 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
539 "emulation project\n");
540 panic("no FPU");
541 }
542 #endif /* !CONFIG_M68KFPU_EMU */
543 }
544
545 #ifdef CONFIG_ADB
adb_probe_sync_enable(char * str)546 static int __init adb_probe_sync_enable (char *str) {
547 extern int __adb_probe_sync;
548 __adb_probe_sync = 1;
549 return 1;
550 }
551
552 __setup("adb_sync", adb_probe_sync_enable);
553 #endif /* CONFIG_ADB */
554