852cefe7c800e1d7530139603e9be4058589fa34
[linux-2.6.git] / 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 int m68k_realnum_memory;
62 EXPORT_SYMBOL(m68k_realnum_memory);
63 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
64 unsigned long m68k_memoffset;
65 EXPORT_SYMBOL(m68k_memoffset);
66 #endif
67 struct mem_info m68k_memory[NUM_MEMINFO];
68 EXPORT_SYMBOL(m68k_memory);
69
70 static struct mem_info m68k_ramdisk;
71
72 static char m68k_command_line[CL_SIZE];
73
74 char m68k_debug_device[6] = "";
75 EXPORT_SYMBOL(m68k_debug_device);
76
77 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
78 /* machine dependent irq functions */
79 void (*mach_init_IRQ) (void) __initdata = NULL;
80 void (*mach_get_model) (char *model);
81 int (*mach_get_hardware_list) (char *buffer);
82 /* machine dependent timer functions */
83 unsigned long (*mach_gettimeoffset) (void);
84 int (*mach_hwclk) (int, struct rtc_time*);
85 EXPORT_SYMBOL(mach_hwclk);
86 int (*mach_set_clock_mmss) (unsigned long);
87 unsigned int (*mach_get_ss)(void);
88 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
89 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
90 EXPORT_SYMBOL(mach_get_ss);
91 EXPORT_SYMBOL(mach_get_rtc_pll);
92 EXPORT_SYMBOL(mach_set_rtc_pll);
93 void (*mach_reset)( void );
94 void (*mach_halt)( void );
95 void (*mach_power_off)( void );
96 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
97 #ifdef CONFIG_HEARTBEAT
98 void (*mach_heartbeat) (int);
99 EXPORT_SYMBOL(mach_heartbeat);
100 #endif
101 #ifdef CONFIG_M68K_L2_CACHE
102 void (*mach_l2_flush) (int);
103 #endif
104 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
105 void (*mach_beep)(unsigned int, unsigned int);
106 EXPORT_SYMBOL(mach_beep);
107 #endif
108 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
109 int isa_type;
110 int isa_sex;
111 EXPORT_SYMBOL(isa_type);
112 EXPORT_SYMBOL(isa_sex);
113 #endif
114
115 extern int amiga_parse_bootinfo(const struct bi_record *);
116 extern int atari_parse_bootinfo(const struct bi_record *);
117 extern int mac_parse_bootinfo(const struct bi_record *);
118 extern int q40_parse_bootinfo(const struct bi_record *);
119 extern int bvme6000_parse_bootinfo(const struct bi_record *);
120 extern int mvme16x_parse_bootinfo(const struct bi_record *);
121 extern int mvme147_parse_bootinfo(const struct bi_record *);
122 extern int hp300_parse_bootinfo(const struct bi_record *);
123
124 extern void config_amiga(void);
125 extern void config_atari(void);
126 extern void config_mac(void);
127 extern void config_sun3(void);
128 extern void config_apollo(void);
129 extern void config_mvme147(void);
130 extern void config_mvme16x(void);
131 extern void config_bvme6000(void);
132 extern void config_hp300(void);
133 extern void config_q40(void);
134 extern void config_sun3x(void);
135
136 #define MASK_256K 0xfffc0000
137
138 extern void paging_init(void);
139
140 static void __init m68k_parse_bootinfo(const struct bi_record *record)
141 {
142         while (record->tag != BI_LAST) {
143                 int unknown = 0;
144                 const unsigned long *data = record->data;
145
146                 switch (record->tag) {
147                 case BI_MACHTYPE:
148                 case BI_CPUTYPE:
149                 case BI_FPUTYPE:
150                 case BI_MMUTYPE:
151                         /* Already set up by head.S */
152                         break;
153
154                 case BI_MEMCHUNK:
155                         if (m68k_num_memory < NUM_MEMINFO) {
156                                 m68k_memory[m68k_num_memory].addr = data[0];
157                                 m68k_memory[m68k_num_memory].size = data[1];
158                                 m68k_num_memory++;
159                         } else
160                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
161                         break;
162
163                 case BI_RAMDISK:
164                         m68k_ramdisk.addr = data[0];
165                         m68k_ramdisk.size = data[1];
166                         break;
167
168                 case BI_COMMAND_LINE:
169                         strlcpy(m68k_command_line, (const char *)data,
170                                 sizeof(m68k_command_line));
171                         break;
172
173                 default:
174                         if (MACH_IS_AMIGA)
175                                 unknown = amiga_parse_bootinfo(record);
176                         else if (MACH_IS_ATARI)
177                                 unknown = atari_parse_bootinfo(record);
178                         else if (MACH_IS_MAC)
179                                 unknown = mac_parse_bootinfo(record);
180                         else if (MACH_IS_Q40)
181                                 unknown = q40_parse_bootinfo(record);
182                         else if (MACH_IS_BVME6000)
183                                 unknown = bvme6000_parse_bootinfo(record);
184                         else if (MACH_IS_MVME16x)
185                                 unknown = mvme16x_parse_bootinfo(record);
186                         else if (MACH_IS_MVME147)
187                                 unknown = mvme147_parse_bootinfo(record);
188                         else if (MACH_IS_HP300)
189                                 unknown = hp300_parse_bootinfo(record);
190                         else
191                                 unknown = 1;
192                 }
193                 if (unknown)
194                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
195                                record->tag);
196                 record = (struct bi_record *)((unsigned long)record +
197                                               record->size);
198         }
199
200         m68k_realnum_memory = m68k_num_memory;
201 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
202         if (m68k_num_memory > 1) {
203                 printk("Ignoring last %i chunks of physical memory\n",
204                        (m68k_num_memory - 1));
205                 m68k_num_memory = 1;
206         }
207         m68k_memoffset = m68k_memory[0].addr-PAGE_OFFSET;
208 #endif
209 }
210
211 void __init setup_arch(char **cmdline_p)
212 {
213         extern int _etext, _edata, _end;
214 #ifndef CONFIG_SUN3
215         unsigned long endmem, startmem;
216 #endif
217         int i;
218         char *p, *q;
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         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
229          * be confused by software FPU emulation. BEWARE.
230          * We should really do our own FPU check at startup.
231          * [what do we do with buggy 68LC040s? if we have problems
232          *  with them, we should add a test to check_bugs() below] */
233 #ifndef CONFIG_M68KFPU_EMU_ONLY
234         /* clear the fpu if we have one */
235         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
236                 volatile int zero = 0;
237                 asm volatile ("frestore %0" : : "m" (zero));
238         }
239 #endif
240
241         if (CPU_IS_060) {
242                 u32 pcr;
243
244                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
245                      : "=d" (pcr));
246                 if (((pcr >> 8) & 0xff) <= 5) {
247                         printk("Enabling workaround for errata I14\n");
248                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
249                              : : "d" (pcr | 0x20));
250                 }
251         }
252
253         init_mm.start_code = PAGE_OFFSET;
254         init_mm.end_code = (unsigned long) &_etext;
255         init_mm.end_data = (unsigned long) &_edata;
256         init_mm.brk = (unsigned long) &_end;
257
258         *cmdline_p = m68k_command_line;
259         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
260
261         /* Parse the command line for arch-specific options.
262          * For the m68k, this is currently only "debug=xxx" to enable printing
263          * certain kernel messages to some machine-specific device.
264          */
265         for (p = *cmdline_p; p && *p;) {
266                 i = 0;
267                 if (!strncmp(p, "debug=", 6)) {
268                         strlcpy(m68k_debug_device, p+6, sizeof(m68k_debug_device));
269                         q = strchr(m68k_debug_device, ' ');
270                         if (q)
271                                 *q = 0;
272                         i = 1;
273                 }
274 #ifdef CONFIG_ATARI
275                 /* This option must be parsed very early */
276                 if (!strncmp(p, "switches=", 9)) {
277                         extern void atari_switches_setup(const char *, int);
278                         q = strchr(p + 9, ' ');
279                         atari_switches_setup(p + 9, q ? (q - (p + 9)) : strlen(p + 9));
280                         i = 1;
281                 }
282 #endif
283
284                 if (i) {
285                         /* option processed, delete it */
286                         if ((q = strchr(p, ' ')))
287                                 strcpy(p, q + 1);
288                         else
289                                 *p = 0;
290                 } else {
291                         if ((p = strchr(p, ' ')))
292                                 ++p;
293                 }
294         }
295
296 #ifdef CONFIG_DUMMY_CONSOLE
297         conswitchp = &dummy_con;
298 #endif
299
300         switch (m68k_machtype) {
301 #ifdef CONFIG_AMIGA
302         case MACH_AMIGA:
303                 config_amiga();
304                 break;
305 #endif
306 #ifdef CONFIG_ATARI
307         case MACH_ATARI:
308                 config_atari();
309                 break;
310 #endif
311 #ifdef CONFIG_MAC
312         case MACH_MAC:
313                 config_mac();
314                 break;
315 #endif
316 #ifdef CONFIG_SUN3
317         case MACH_SUN3:
318                 config_sun3();
319                 break;
320 #endif
321 #ifdef CONFIG_APOLLO
322         case MACH_APOLLO:
323                 config_apollo();
324                 break;
325 #endif
326 #ifdef CONFIG_MVME147
327         case MACH_MVME147:
328                 config_mvme147();
329                 break;
330 #endif
331 #ifdef CONFIG_MVME16x
332         case MACH_MVME16x:
333                 config_mvme16x();
334                 break;
335 #endif
336 #ifdef CONFIG_BVME6000
337         case MACH_BVME6000:
338                 config_bvme6000();
339                 break;
340 #endif
341 #ifdef CONFIG_HP300
342         case MACH_HP300:
343                 config_hp300();
344                 break;
345 #endif
346 #ifdef CONFIG_Q40
347         case MACH_Q40:
348                 config_q40();
349                 break;
350 #endif
351 #ifdef CONFIG_SUN3X
352         case MACH_SUN3X:
353                 config_sun3x();
354                 break;
355 #endif
356         default:
357                 panic("No configuration setup");
358         }
359
360 #ifndef CONFIG_SUN3
361         startmem= m68k_memory[0].addr;
362         endmem = startmem + m68k_memory[0].size;
363         high_memory = (void *)PAGE_OFFSET;
364         for (i = 0; i < m68k_num_memory; i++) {
365                 m68k_memory[i].size &= MASK_256K;
366                 if (m68k_memory[i].addr < startmem)
367                         startmem = m68k_memory[i].addr;
368                 if (m68k_memory[i].addr+m68k_memory[i].size > endmem)
369                         endmem = m68k_memory[i].addr+m68k_memory[i].size;
370                 high_memory += m68k_memory[i].size;
371         }
372
373         availmem += init_bootmem_node(NODE_DATA(0), availmem >> PAGE_SHIFT,
374                                       startmem >> PAGE_SHIFT, endmem >> PAGE_SHIFT);
375
376         for (i = 0; i < m68k_num_memory; i++)
377                 free_bootmem(m68k_memory[i].addr, m68k_memory[i].size);
378
379         reserve_bootmem(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
380
381 #ifdef CONFIG_BLK_DEV_INITRD
382         if (m68k_ramdisk.size) {
383                 reserve_bootmem(m68k_ramdisk.addr, m68k_ramdisk.size);
384                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
385                 initrd_end = initrd_start + m68k_ramdisk.size;
386                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
387         }
388 #endif
389
390 #ifdef CONFIG_ATARI
391         if (MACH_IS_ATARI)
392                 atari_stram_reserve_pages((void *)availmem);
393 #endif
394 #ifdef CONFIG_SUN3X
395         if (MACH_IS_SUN3X) {
396                 dvma_init();
397         }
398 #endif
399
400 #endif /* !CONFIG_SUN3 */
401
402         paging_init();
403
404 /* set ISA defs early as possible */
405 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
406 #if defined(CONFIG_Q40)
407         if (MACH_IS_Q40) {
408                 isa_type = Q40_ISA;
409                 isa_sex = 0;
410         }
411 #elif defined(CONFIG_GG2)
412         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
413                 isa_type = GG2_ISA;
414                 isa_sex = 0;
415         }
416 #elif defined(CONFIG_AMIGA_PCMCIA)
417         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
418                 isa_type = AG_ISA;
419                 isa_sex = 1;
420         }
421 #endif
422 #endif
423 }
424
425 static int show_cpuinfo(struct seq_file *m, void *v)
426 {
427         const char *cpu, *mmu, *fpu;
428         unsigned long clockfreq, clockfactor;
429
430 #define LOOP_CYCLES_68020       (8)
431 #define LOOP_CYCLES_68030       (8)
432 #define LOOP_CYCLES_68040       (3)
433 #define LOOP_CYCLES_68060       (1)
434
435         if (CPU_IS_020) {
436                 cpu = "68020";
437                 clockfactor = LOOP_CYCLES_68020;
438         } else if (CPU_IS_030) {
439                 cpu = "68030";
440                 clockfactor = LOOP_CYCLES_68030;
441         } else if (CPU_IS_040) {
442                 cpu = "68040";
443                 clockfactor = LOOP_CYCLES_68040;
444         } else if (CPU_IS_060) {
445                 cpu = "68060";
446                 clockfactor = LOOP_CYCLES_68060;
447         } else {
448                 cpu = "680x0";
449                 clockfactor = 0;
450         }
451
452 #ifdef CONFIG_M68KFPU_EMU_ONLY
453         fpu = "none(soft float)";
454 #else
455         if (m68k_fputype & FPU_68881)
456                 fpu = "68881";
457         else if (m68k_fputype & FPU_68882)
458                 fpu = "68882";
459         else if (m68k_fputype & FPU_68040)
460                 fpu = "68040";
461         else if (m68k_fputype & FPU_68060)
462                 fpu = "68060";
463         else if (m68k_fputype & FPU_SUNFPA)
464                 fpu = "Sun FPA";
465         else
466                 fpu = "none";
467 #endif
468
469         if (m68k_mmutype & MMU_68851)
470                 mmu = "68851";
471         else if (m68k_mmutype & MMU_68030)
472                 mmu = "68030";
473         else if (m68k_mmutype & MMU_68040)
474                 mmu = "68040";
475         else if (m68k_mmutype & MMU_68060)
476                 mmu = "68060";
477         else if (m68k_mmutype & MMU_SUN3)
478                 mmu = "Sun-3";
479         else if (m68k_mmutype & MMU_APOLLO)
480                 mmu = "Apollo";
481         else
482                 mmu = "unknown";
483
484         clockfreq = loops_per_jiffy * HZ * clockfactor;
485
486         seq_printf(m, "CPU:\t\t%s\n"
487                    "MMU:\t\t%s\n"
488                    "FPU:\t\t%s\n"
489                    "Clocking:\t%lu.%1luMHz\n"
490                    "BogoMips:\t%lu.%02lu\n"
491                    "Calibration:\t%lu loops\n",
492                    cpu, mmu, fpu,
493                    clockfreq/1000000,(clockfreq/100000)%10,
494                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
495                    loops_per_jiffy);
496         return 0;
497 }
498
499 static void *c_start(struct seq_file *m, loff_t *pos)
500 {
501         return *pos < 1 ? (void *)1 : NULL;
502 }
503 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
504 {
505         ++*pos;
506         return NULL;
507 }
508 static void c_stop(struct seq_file *m, void *v)
509 {
510 }
511 struct seq_operations cpuinfo_op = {
512         .start  = c_start,
513         .next   = c_next,
514         .stop   = c_stop,
515         .show   = show_cpuinfo,
516 };
517
518 int get_hardware_list(char *buffer)
519 {
520         int len = 0;
521         char model[80];
522         unsigned long mem;
523         int i;
524
525         if (mach_get_model)
526                 mach_get_model(model);
527         else
528                 strcpy(model, "Unknown m68k");
529
530         len += sprintf(buffer + len, "Model:\t\t%s\n", model);
531         for (mem = 0, i = 0; i < m68k_num_memory; i++)
532                 mem += m68k_memory[i].size;
533         len += sprintf(buffer + len, "System Memory:\t%ldK\n", mem >> 10);
534
535         if (mach_get_hardware_list)
536                 len += mach_get_hardware_list(buffer + len);
537
538         return len;
539 }
540
541 void check_bugs(void)
542 {
543 #ifndef CONFIG_M68KFPU_EMU
544         if (m68k_fputype == 0) {
545                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
546                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
547                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
548                         "emulation project\n");
549                 panic("no FPU");
550         }
551 #endif /* !CONFIG_M68KFPU_EMU */
552 }