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[linux-2.6] / arch / m68k / kernel / setup.c
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/seq_file.h>
24 #include <linux/module.h>
25 #include <linux/initrd.h>
26
27 #include <asm/bootinfo.h>
28 #include <asm/setup.h>
29 #include <asm/irq.h>
30 #include <asm/io.h>
31 #include <asm/machdep.h>
32 #ifdef CONFIG_AMIGA
33 #include <asm/amigahw.h>
34 #endif
35 #ifdef CONFIG_ATARI
36 #include <asm/atarihw.h>
37 #include <asm/atari_stram.h>
38 #endif
39 #ifdef CONFIG_SUN3X
40 #include <asm/dvma.h>
41 #endif
42
43 unsigned long m68k_machtype;
44 unsigned long m68k_cputype;
45 EXPORT_SYMBOL(m68k_machtype);
46 EXPORT_SYMBOL(m68k_cputype);
47 unsigned long m68k_fputype;
48 unsigned long m68k_mmutype;
49 #ifdef CONFIG_VME
50 unsigned long vme_brdtype;
51 EXPORT_SYMBOL(vme_brdtype);
52 #endif
53
54 int m68k_is040or060;
55 EXPORT_SYMBOL(m68k_is040or060);
56
57 extern int end;
58 extern unsigned long availmem;
59
60 int m68k_num_memory;
61 EXPORT_SYMBOL(m68k_num_memory);
62 int m68k_realnum_memory;
63 EXPORT_SYMBOL(m68k_realnum_memory);
64 unsigned long m68k_memoffset;
65 EXPORT_SYMBOL(m68k_memoffset);
66 struct mem_info m68k_memory[NUM_MEMINFO];
67 EXPORT_SYMBOL(m68k_memory);
68
69 struct mem_info m68k_ramdisk;
70
71 static char m68k_command_line[CL_SIZE];
72
73 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
74 /* machine dependent irq functions */
75 void (*mach_init_IRQ) (void) __initdata = NULL;
76 void (*mach_get_model) (char *model);
77 int (*mach_get_hardware_list) (char *buffer);
78 /* machine dependent timer functions */
79 unsigned long (*mach_gettimeoffset) (void);
80 int (*mach_hwclk) (int, struct rtc_time*);
81 EXPORT_SYMBOL(mach_hwclk);
82 int (*mach_set_clock_mmss) (unsigned long);
83 unsigned int (*mach_get_ss)(void);
84 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
85 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
86 EXPORT_SYMBOL(mach_get_ss);
87 EXPORT_SYMBOL(mach_get_rtc_pll);
88 EXPORT_SYMBOL(mach_set_rtc_pll);
89 void (*mach_reset)( void );
90 void (*mach_halt)( void );
91 void (*mach_power_off)( void );
92 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
93 #ifdef CONFIG_HEARTBEAT
94 void (*mach_heartbeat) (int);
95 EXPORT_SYMBOL(mach_heartbeat);
96 #endif
97 #ifdef CONFIG_M68K_L2_CACHE
98 void (*mach_l2_flush) (int);
99 #endif
100 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
101 void (*mach_beep)(unsigned int, unsigned int);
102 EXPORT_SYMBOL(mach_beep);
103 #endif
104 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
105 int isa_type;
106 int isa_sex;
107 EXPORT_SYMBOL(isa_type);
108 EXPORT_SYMBOL(isa_sex);
109 #endif
110
111 extern int amiga_parse_bootinfo(const struct bi_record *);
112 extern int atari_parse_bootinfo(const struct bi_record *);
113 extern int mac_parse_bootinfo(const struct bi_record *);
114 extern int q40_parse_bootinfo(const struct bi_record *);
115 extern int bvme6000_parse_bootinfo(const struct bi_record *);
116 extern int mvme16x_parse_bootinfo(const struct bi_record *);
117 extern int mvme147_parse_bootinfo(const struct bi_record *);
118 extern int hp300_parse_bootinfo(const struct bi_record *);
119
120 extern void config_amiga(void);
121 extern void config_atari(void);
122 extern void config_mac(void);
123 extern void config_sun3(void);
124 extern void config_apollo(void);
125 extern void config_mvme147(void);
126 extern void config_mvme16x(void);
127 extern void config_bvme6000(void);
128 extern void config_hp300(void);
129 extern void config_q40(void);
130 extern void config_sun3x(void);
131
132 #define MASK_256K 0xfffc0000
133
134 extern void paging_init(void);
135
136 static void __init m68k_parse_bootinfo(const struct bi_record *record)
137 {
138         while (record->tag != BI_LAST) {
139                 int unknown = 0;
140                 const unsigned long *data = record->data;
141
142                 switch (record->tag) {
143                 case BI_MACHTYPE:
144                 case BI_CPUTYPE:
145                 case BI_FPUTYPE:
146                 case BI_MMUTYPE:
147                         /* Already set up by head.S */
148                         break;
149
150                 case BI_MEMCHUNK:
151                         if (m68k_num_memory < NUM_MEMINFO) {
152                                 m68k_memory[m68k_num_memory].addr = data[0];
153                                 m68k_memory[m68k_num_memory].size = data[1];
154                                 m68k_num_memory++;
155                         } else
156                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
157                         break;
158
159                 case BI_RAMDISK:
160                         m68k_ramdisk.addr = data[0];
161                         m68k_ramdisk.size = data[1];
162                         break;
163
164                 case BI_COMMAND_LINE:
165                         strlcpy(m68k_command_line, (const char *)data,
166                                 sizeof(m68k_command_line));
167                         break;
168
169                 default:
170                         if (MACH_IS_AMIGA)
171                                 unknown = amiga_parse_bootinfo(record);
172                         else if (MACH_IS_ATARI)
173                                 unknown = atari_parse_bootinfo(record);
174                         else if (MACH_IS_MAC)
175                                 unknown = mac_parse_bootinfo(record);
176                         else if (MACH_IS_Q40)
177                                 unknown = q40_parse_bootinfo(record);
178                         else if (MACH_IS_BVME6000)
179                                 unknown = bvme6000_parse_bootinfo(record);
180                         else if (MACH_IS_MVME16x)
181                                 unknown = mvme16x_parse_bootinfo(record);
182                         else if (MACH_IS_MVME147)
183                                 unknown = mvme147_parse_bootinfo(record);
184                         else if (MACH_IS_HP300)
185                                 unknown = hp300_parse_bootinfo(record);
186                         else
187                                 unknown = 1;
188                 }
189                 if (unknown)
190                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
191                                record->tag);
192                 record = (struct bi_record *)((unsigned long)record +
193                                               record->size);
194         }
195
196         m68k_realnum_memory = m68k_num_memory;
197 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
198         if (m68k_num_memory > 1) {
199                 printk("Ignoring last %i chunks of physical memory\n",
200                        (m68k_num_memory - 1));
201                 m68k_num_memory = 1;
202         }
203         m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
204 #endif
205 }
206
207 void __init setup_arch(char **cmdline_p)
208 {
209         extern int _etext, _edata, _end;
210         int i;
211
212         /* The bootinfo is located right after the kernel bss */
213         m68k_parse_bootinfo((const struct bi_record *)&_end);
214
215         if (CPU_IS_040)
216                 m68k_is040or060 = 4;
217         else if (CPU_IS_060)
218                 m68k_is040or060 = 6;
219
220         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
221          * be confused by software FPU emulation. BEWARE.
222          * We should really do our own FPU check at startup.
223          * [what do we do with buggy 68LC040s? if we have problems
224          *  with them, we should add a test to check_bugs() below] */
225 #ifndef CONFIG_M68KFPU_EMU_ONLY
226         /* clear the fpu if we have one */
227         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
228                 volatile int zero = 0;
229                 asm volatile ("frestore %0" : : "m" (zero));
230         }
231 #endif
232
233         if (CPU_IS_060) {
234                 u32 pcr;
235
236                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
237                      : "=d" (pcr));
238                 if (((pcr >> 8) & 0xff) <= 5) {
239                         printk("Enabling workaround for errata I14\n");
240                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
241                              : : "d" (pcr | 0x20));
242                 }
243         }
244
245         init_mm.start_code = PAGE_OFFSET;
246         init_mm.end_code = (unsigned long) &_etext;
247         init_mm.end_data = (unsigned long) &_edata;
248         init_mm.brk = (unsigned long) &_end;
249
250         *cmdline_p = m68k_command_line;
251         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
252
253         parse_early_param();
254
255 #ifdef CONFIG_DUMMY_CONSOLE
256         conswitchp = &dummy_con;
257 #endif
258
259         switch (m68k_machtype) {
260 #ifdef CONFIG_AMIGA
261         case MACH_AMIGA:
262                 config_amiga();
263                 break;
264 #endif
265 #ifdef CONFIG_ATARI
266         case MACH_ATARI:
267                 config_atari();
268                 break;
269 #endif
270 #ifdef CONFIG_MAC
271         case MACH_MAC:
272                 config_mac();
273                 break;
274 #endif
275 #ifdef CONFIG_SUN3
276         case MACH_SUN3:
277                 config_sun3();
278                 break;
279 #endif
280 #ifdef CONFIG_APOLLO
281         case MACH_APOLLO:
282                 config_apollo();
283                 break;
284 #endif
285 #ifdef CONFIG_MVME147
286         case MACH_MVME147:
287                 config_mvme147();
288                 break;
289 #endif
290 #ifdef CONFIG_MVME16x
291         case MACH_MVME16x:
292                 config_mvme16x();
293                 break;
294 #endif
295 #ifdef CONFIG_BVME6000
296         case MACH_BVME6000:
297                 config_bvme6000();
298                 break;
299 #endif
300 #ifdef CONFIG_HP300
301         case MACH_HP300:
302                 config_hp300();
303                 break;
304 #endif
305 #ifdef CONFIG_Q40
306         case MACH_Q40:
307                 config_q40();
308                 break;
309 #endif
310 #ifdef CONFIG_SUN3X
311         case MACH_SUN3X:
312                 config_sun3x();
313                 break;
314 #endif
315         default:
316                 panic("No configuration setup");
317         }
318
319         paging_init();
320
321 #ifndef CONFIG_SUN3
322         for (i = 1; i < m68k_num_memory; i++)
323                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
324                                   m68k_memory[i].size);
325 #ifdef CONFIG_BLK_DEV_INITRD
326         if (m68k_ramdisk.size) {
327                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
328                                      m68k_ramdisk.addr, m68k_ramdisk.size);
329                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
330                 initrd_end = initrd_start + m68k_ramdisk.size;
331                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
332         }
333 #endif
334
335 #ifdef CONFIG_ATARI
336         if (MACH_IS_ATARI)
337                 atari_stram_reserve_pages((void *)availmem);
338 #endif
339 #ifdef CONFIG_SUN3X
340         if (MACH_IS_SUN3X) {
341                 dvma_init();
342         }
343 #endif
344
345 #endif /* !CONFIG_SUN3 */
346
347 /* set ISA defs early as possible */
348 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
349 #if defined(CONFIG_Q40)
350         if (MACH_IS_Q40) {
351                 isa_type = Q40_ISA;
352                 isa_sex = 0;
353         }
354 #elif defined(CONFIG_GG2)
355         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
356                 isa_type = GG2_ISA;
357                 isa_sex = 0;
358         }
359 #elif defined(CONFIG_AMIGA_PCMCIA)
360         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
361                 isa_type = AG_ISA;
362                 isa_sex = 1;
363         }
364 #endif
365 #endif
366 }
367
368 static int show_cpuinfo(struct seq_file *m, void *v)
369 {
370         const char *cpu, *mmu, *fpu;
371         unsigned long clockfreq, clockfactor;
372
373 #define LOOP_CYCLES_68020       (8)
374 #define LOOP_CYCLES_68030       (8)
375 #define LOOP_CYCLES_68040       (3)
376 #define LOOP_CYCLES_68060       (1)
377
378         if (CPU_IS_020) {
379                 cpu = "68020";
380                 clockfactor = LOOP_CYCLES_68020;
381         } else if (CPU_IS_030) {
382                 cpu = "68030";
383                 clockfactor = LOOP_CYCLES_68030;
384         } else if (CPU_IS_040) {
385                 cpu = "68040";
386                 clockfactor = LOOP_CYCLES_68040;
387         } else if (CPU_IS_060) {
388                 cpu = "68060";
389                 clockfactor = LOOP_CYCLES_68060;
390         } else {
391                 cpu = "680x0";
392                 clockfactor = 0;
393         }
394
395 #ifdef CONFIG_M68KFPU_EMU_ONLY
396         fpu = "none(soft float)";
397 #else
398         if (m68k_fputype & FPU_68881)
399                 fpu = "68881";
400         else if (m68k_fputype & FPU_68882)
401                 fpu = "68882";
402         else if (m68k_fputype & FPU_68040)
403                 fpu = "68040";
404         else if (m68k_fputype & FPU_68060)
405                 fpu = "68060";
406         else if (m68k_fputype & FPU_SUNFPA)
407                 fpu = "Sun FPA";
408         else
409                 fpu = "none";
410 #endif
411
412         if (m68k_mmutype & MMU_68851)
413                 mmu = "68851";
414         else if (m68k_mmutype & MMU_68030)
415                 mmu = "68030";
416         else if (m68k_mmutype & MMU_68040)
417                 mmu = "68040";
418         else if (m68k_mmutype & MMU_68060)
419                 mmu = "68060";
420         else if (m68k_mmutype & MMU_SUN3)
421                 mmu = "Sun-3";
422         else if (m68k_mmutype & MMU_APOLLO)
423                 mmu = "Apollo";
424         else
425                 mmu = "unknown";
426
427         clockfreq = loops_per_jiffy * HZ * clockfactor;
428
429         seq_printf(m, "CPU:\t\t%s\n"
430                    "MMU:\t\t%s\n"
431                    "FPU:\t\t%s\n"
432                    "Clocking:\t%lu.%1luMHz\n"
433                    "BogoMips:\t%lu.%02lu\n"
434                    "Calibration:\t%lu loops\n",
435                    cpu, mmu, fpu,
436                    clockfreq/1000000,(clockfreq/100000)%10,
437                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
438                    loops_per_jiffy);
439         return 0;
440 }
441
442 static void *c_start(struct seq_file *m, loff_t *pos)
443 {
444         return *pos < 1 ? (void *)1 : NULL;
445 }
446 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
447 {
448         ++*pos;
449         return NULL;
450 }
451 static void c_stop(struct seq_file *m, void *v)
452 {
453 }
454 struct seq_operations cpuinfo_op = {
455         .start  = c_start,
456         .next   = c_next,
457         .stop   = c_stop,
458         .show   = show_cpuinfo,
459 };
460
461 int get_hardware_list(char *buffer)
462 {
463         int len = 0;
464         char model[80];
465         unsigned long mem;
466         int i;
467
468         if (mach_get_model)
469                 mach_get_model(model);
470         else
471                 strcpy(model, "Unknown m68k");
472
473         len += sprintf(buffer + len, "Model:\t\t%s\n", model);
474         for (mem = 0, i = 0; i < m68k_num_memory; i++)
475                 mem += m68k_memory[i].size;
476         len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10);
477
478         if (mach_get_hardware_list)
479                 len += mach_get_hardware_list(buffer + len);
480
481         return len;
482 }
483
484 void check_bugs(void)
485 {
486 #ifndef CONFIG_M68KFPU_EMU
487         if (m68k_fputype == 0) {
488                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
489                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
490                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
491                         "emulation project\n");
492                 panic("no FPU");
493         }
494 #endif /* !CONFIG_M68KFPU_EMU */
495 }
496
497 #ifdef CONFIG_ADB
498 static int __init adb_probe_sync_enable (char *str) {
499         extern int __adb_probe_sync;
500         __adb_probe_sync = 1;
501         return 1;
502 }
503
504 __setup("adb_sync", adb_probe_sync_enable);
505 #endif /* CONFIG_ADB */