4d97bd2bd573845db42d11b8b03c096b5148eac9
[linux-3.10.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/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/setup.h>
30 #include <asm/fpu.h>
31 #include <asm/irq.h>
32 #include <asm/io.h>
33 #include <asm/machdep.h>
34 #ifdef CONFIG_AMIGA
35 #include <asm/amigahw.h>
36 #endif
37 #ifdef CONFIG_ATARI
38 #include <asm/atarihw.h>
39 #include <asm/atari_stram.h>
40 #endif
41 #ifdef CONFIG_SUN3X
42 #include <asm/dvma.h>
43 #endif
44
45 #if !FPSTATESIZE || !NR_IRQS
46 #warning No CPU/platform type selected, your kernel will not work!
47 #warning Are you building an allnoconfig kernel?
48 #endif
49
50 unsigned long m68k_machtype;
51 EXPORT_SYMBOL(m68k_machtype);
52 unsigned long m68k_cputype;
53 EXPORT_SYMBOL(m68k_cputype);
54 unsigned long m68k_fputype;
55 unsigned long m68k_mmutype;
56 EXPORT_SYMBOL(m68k_mmutype);
57 #ifdef CONFIG_VME
58 unsigned long vme_brdtype;
59 EXPORT_SYMBOL(vme_brdtype);
60 #endif
61
62 int m68k_is040or060;
63 EXPORT_SYMBOL(m68k_is040or060);
64
65 extern int end;
66 extern unsigned long availmem;
67
68 int m68k_num_memory;
69 EXPORT_SYMBOL(m68k_num_memory);
70 int m68k_realnum_memory;
71 EXPORT_SYMBOL(m68k_realnum_memory);
72 unsigned long m68k_memoffset;
73 struct mem_info m68k_memory[NUM_MEMINFO];
74 EXPORT_SYMBOL(m68k_memory);
75
76 struct mem_info m68k_ramdisk;
77
78 static char m68k_command_line[CL_SIZE];
79
80 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
81 /* machine dependent irq functions */
82 void (*mach_init_IRQ) (void) __initdata = NULL;
83 void (*mach_get_model) (char *model);
84 void (*mach_get_hardware_list) (struct seq_file *m);
85 /* machine dependent timer functions */
86 unsigned long (*mach_gettimeoffset) (void);
87 int (*mach_hwclk) (int, struct rtc_time*);
88 EXPORT_SYMBOL(mach_hwclk);
89 int (*mach_set_clock_mmss) (unsigned long);
90 unsigned int (*mach_get_ss)(void);
91 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
92 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
93 EXPORT_SYMBOL(mach_get_ss);
94 EXPORT_SYMBOL(mach_get_rtc_pll);
95 EXPORT_SYMBOL(mach_set_rtc_pll);
96 void (*mach_reset)( void );
97 void (*mach_halt)( void );
98 void (*mach_power_off)( void );
99 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
100 #ifdef CONFIG_HEARTBEAT
101 void (*mach_heartbeat) (int);
102 EXPORT_SYMBOL(mach_heartbeat);
103 #endif
104 #ifdef CONFIG_M68K_L2_CACHE
105 void (*mach_l2_flush) (int);
106 #endif
107 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
108 void (*mach_beep)(unsigned int, unsigned int);
109 EXPORT_SYMBOL(mach_beep);
110 #endif
111 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
112 int isa_type;
113 int isa_sex;
114 EXPORT_SYMBOL(isa_type);
115 EXPORT_SYMBOL(isa_sex);
116 #endif
117
118 extern int amiga_parse_bootinfo(const struct bi_record *);
119 extern int atari_parse_bootinfo(const struct bi_record *);
120 extern int mac_parse_bootinfo(const struct bi_record *);
121 extern int q40_parse_bootinfo(const struct bi_record *);
122 extern int bvme6000_parse_bootinfo(const struct bi_record *);
123 extern int mvme16x_parse_bootinfo(const struct bi_record *);
124 extern int mvme147_parse_bootinfo(const struct bi_record *);
125 extern int hp300_parse_bootinfo(const struct bi_record *);
126 extern int apollo_parse_bootinfo(const struct bi_record *);
127
128 extern void config_amiga(void);
129 extern void config_atari(void);
130 extern void config_mac(void);
131 extern void config_sun3(void);
132 extern void config_apollo(void);
133 extern void config_mvme147(void);
134 extern void config_mvme16x(void);
135 extern void config_bvme6000(void);
136 extern void config_hp300(void);
137 extern void config_q40(void);
138 extern void config_sun3x(void);
139
140 #define MASK_256K 0xfffc0000
141
142 extern void paging_init(void);
143
144 static void __init m68k_parse_bootinfo(const struct bi_record *record)
145 {
146         while (record->tag != BI_LAST) {
147                 int unknown = 0;
148                 const unsigned long *data = record->data;
149
150                 switch (record->tag) {
151                 case BI_MACHTYPE:
152                 case BI_CPUTYPE:
153                 case BI_FPUTYPE:
154                 case BI_MMUTYPE:
155                         /* Already set up by head.S */
156                         break;
157
158                 case BI_MEMCHUNK:
159                         if (m68k_num_memory < NUM_MEMINFO) {
160                                 m68k_memory[m68k_num_memory].addr = data[0];
161                                 m68k_memory[m68k_num_memory].size = data[1];
162                                 m68k_num_memory++;
163                         } else
164                                 printk("m68k_parse_bootinfo: too many memory chunks\n");
165                         break;
166
167                 case BI_RAMDISK:
168                         m68k_ramdisk.addr = data[0];
169                         m68k_ramdisk.size = data[1];
170                         break;
171
172                 case BI_COMMAND_LINE:
173                         strlcpy(m68k_command_line, (const char *)data,
174                                 sizeof(m68k_command_line));
175                         break;
176
177                 default:
178                         if (MACH_IS_AMIGA)
179                                 unknown = amiga_parse_bootinfo(record);
180                         else if (MACH_IS_ATARI)
181                                 unknown = atari_parse_bootinfo(record);
182                         else if (MACH_IS_MAC)
183                                 unknown = mac_parse_bootinfo(record);
184                         else if (MACH_IS_Q40)
185                                 unknown = q40_parse_bootinfo(record);
186                         else if (MACH_IS_BVME6000)
187                                 unknown = bvme6000_parse_bootinfo(record);
188                         else if (MACH_IS_MVME16x)
189                                 unknown = mvme16x_parse_bootinfo(record);
190                         else if (MACH_IS_MVME147)
191                                 unknown = mvme147_parse_bootinfo(record);
192                         else if (MACH_IS_HP300)
193                                 unknown = hp300_parse_bootinfo(record);
194                         else if (MACH_IS_APOLLO)
195                                 unknown = apollo_parse_bootinfo(record);
196                         else
197                                 unknown = 1;
198                 }
199                 if (unknown)
200                         printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
201                                record->tag);
202                 record = (struct bi_record *)((unsigned long)record +
203                                               record->size);
204         }
205
206         m68k_realnum_memory = m68k_num_memory;
207 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
208         if (m68k_num_memory > 1) {
209                 printk("Ignoring last %i chunks of physical memory\n",
210                        (m68k_num_memory - 1));
211                 m68k_num_memory = 1;
212         }
213 #endif
214 }
215
216 void __init setup_arch(char **cmdline_p)
217 {
218         extern int _etext, _edata, _end;
219         int i;
220
221         /* The bootinfo is located right after the kernel bss */
222         m68k_parse_bootinfo((const struct bi_record *)&_end);
223
224         if (CPU_IS_040)
225                 m68k_is040or060 = 4;
226         else if (CPU_IS_060)
227                 m68k_is040or060 = 6;
228
229         /* FIXME: m68k_fputype is passed in by Penguin booter, which can
230          * be confused by software FPU emulation. BEWARE.
231          * We should really do our own FPU check at startup.
232          * [what do we do with buggy 68LC040s? if we have problems
233          *  with them, we should add a test to check_bugs() below] */
234 #ifndef CONFIG_M68KFPU_EMU_ONLY
235         /* clear the fpu if we have one */
236         if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
237                 volatile int zero = 0;
238                 asm volatile ("frestore %0" : : "m" (zero));
239         }
240 #endif
241
242         if (CPU_IS_060) {
243                 u32 pcr;
244
245                 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
246                      : "=d" (pcr));
247                 if (((pcr >> 8) & 0xff) <= 5) {
248                         printk("Enabling workaround for errata I14\n");
249                         asm (".chip 68060; movec %0,%%pcr; .chip 68k"
250                              : : "d" (pcr | 0x20));
251                 }
252         }
253
254         init_mm.start_code = PAGE_OFFSET;
255         init_mm.end_code = (unsigned long) &_etext;
256         init_mm.end_data = (unsigned long) &_edata;
257         init_mm.brk = (unsigned long) &_end;
258
259         *cmdline_p = m68k_command_line;
260         memcpy(boot_command_line, *cmdline_p, CL_SIZE);
261
262         parse_early_param();
263
264 #ifdef CONFIG_DUMMY_CONSOLE
265         conswitchp = &dummy_con;
266 #endif
267
268         switch (m68k_machtype) {
269 #ifdef CONFIG_AMIGA
270         case MACH_AMIGA:
271                 config_amiga();
272                 break;
273 #endif
274 #ifdef CONFIG_ATARI
275         case MACH_ATARI:
276                 config_atari();
277                 break;
278 #endif
279 #ifdef CONFIG_MAC
280         case MACH_MAC:
281                 config_mac();
282                 break;
283 #endif
284 #ifdef CONFIG_SUN3
285         case MACH_SUN3:
286                 config_sun3();
287                 break;
288 #endif
289 #ifdef CONFIG_APOLLO
290         case MACH_APOLLO:
291                 config_apollo();
292                 break;
293 #endif
294 #ifdef CONFIG_MVME147
295         case MACH_MVME147:
296                 config_mvme147();
297                 break;
298 #endif
299 #ifdef CONFIG_MVME16x
300         case MACH_MVME16x:
301                 config_mvme16x();
302                 break;
303 #endif
304 #ifdef CONFIG_BVME6000
305         case MACH_BVME6000:
306                 config_bvme6000();
307                 break;
308 #endif
309 #ifdef CONFIG_HP300
310         case MACH_HP300:
311                 config_hp300();
312                 break;
313 #endif
314 #ifdef CONFIG_Q40
315         case MACH_Q40:
316                 config_q40();
317                 break;
318 #endif
319 #ifdef CONFIG_SUN3X
320         case MACH_SUN3X:
321                 config_sun3x();
322                 break;
323 #endif
324         default:
325                 panic("No configuration setup");
326         }
327
328         paging_init();
329
330 #ifndef CONFIG_SUN3
331         for (i = 1; i < m68k_num_memory; i++)
332                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
333                                   m68k_memory[i].size);
334 #ifdef CONFIG_BLK_DEV_INITRD
335         if (m68k_ramdisk.size) {
336                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
337                                      m68k_ramdisk.addr, m68k_ramdisk.size,
338                                      BOOTMEM_DEFAULT);
339                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
340                 initrd_end = initrd_start + m68k_ramdisk.size;
341                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
342         }
343 #endif
344
345 #ifdef CONFIG_ATARI
346         if (MACH_IS_ATARI)
347                 atari_stram_reserve_pages((void *)availmem);
348 #endif
349 #ifdef CONFIG_SUN3X
350         if (MACH_IS_SUN3X) {
351                 dvma_init();
352         }
353 #endif
354
355 #endif /* !CONFIG_SUN3 */
356
357 /* set ISA defs early as possible */
358 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
359         if (MACH_IS_Q40) {
360                 isa_type = ISA_TYPE_Q40;
361                 isa_sex = 0;
362         }
363 #ifdef CONFIG_GG2
364         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
365                 isa_type = ISA_TYPE_GG2;
366                 isa_sex = 0;
367         }
368 #endif
369 #ifdef CONFIG_AMIGA_PCMCIA
370         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
371                 isa_type = ISA_TYPE_AG;
372                 isa_sex = 1;
373         }
374 #endif
375 #endif
376 }
377
378 static int show_cpuinfo(struct seq_file *m, void *v)
379 {
380         const char *cpu, *mmu, *fpu;
381         unsigned long clockfreq, clockfactor;
382
383 #define LOOP_CYCLES_68020       (8)
384 #define LOOP_CYCLES_68030       (8)
385 #define LOOP_CYCLES_68040       (3)
386 #define LOOP_CYCLES_68060       (1)
387
388         if (CPU_IS_020) {
389                 cpu = "68020";
390                 clockfactor = LOOP_CYCLES_68020;
391         } else if (CPU_IS_030) {
392                 cpu = "68030";
393                 clockfactor = LOOP_CYCLES_68030;
394         } else if (CPU_IS_040) {
395                 cpu = "68040";
396                 clockfactor = LOOP_CYCLES_68040;
397         } else if (CPU_IS_060) {
398                 cpu = "68060";
399                 clockfactor = LOOP_CYCLES_68060;
400         } else {
401                 cpu = "680x0";
402                 clockfactor = 0;
403         }
404
405 #ifdef CONFIG_M68KFPU_EMU_ONLY
406         fpu = "none(soft float)";
407 #else
408         if (m68k_fputype & FPU_68881)
409                 fpu = "68881";
410         else if (m68k_fputype & FPU_68882)
411                 fpu = "68882";
412         else if (m68k_fputype & FPU_68040)
413                 fpu = "68040";
414         else if (m68k_fputype & FPU_68060)
415                 fpu = "68060";
416         else if (m68k_fputype & FPU_SUNFPA)
417                 fpu = "Sun FPA";
418         else
419                 fpu = "none";
420 #endif
421
422         if (m68k_mmutype & MMU_68851)
423                 mmu = "68851";
424         else if (m68k_mmutype & MMU_68030)
425                 mmu = "68030";
426         else if (m68k_mmutype & MMU_68040)
427                 mmu = "68040";
428         else if (m68k_mmutype & MMU_68060)
429                 mmu = "68060";
430         else if (m68k_mmutype & MMU_SUN3)
431                 mmu = "Sun-3";
432         else if (m68k_mmutype & MMU_APOLLO)
433                 mmu = "Apollo";
434         else
435                 mmu = "unknown";
436
437         clockfreq = loops_per_jiffy * HZ * clockfactor;
438
439         seq_printf(m, "CPU:\t\t%s\n"
440                    "MMU:\t\t%s\n"
441                    "FPU:\t\t%s\n"
442                    "Clocking:\t%lu.%1luMHz\n"
443                    "BogoMips:\t%lu.%02lu\n"
444                    "Calibration:\t%lu loops\n",
445                    cpu, mmu, fpu,
446                    clockfreq/1000000,(clockfreq/100000)%10,
447                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
448                    loops_per_jiffy);
449         return 0;
450 }
451
452 static void *c_start(struct seq_file *m, loff_t *pos)
453 {
454         return *pos < 1 ? (void *)1 : NULL;
455 }
456 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
457 {
458         ++*pos;
459         return NULL;
460 }
461 static void c_stop(struct seq_file *m, void *v)
462 {
463 }
464 const struct seq_operations cpuinfo_op = {
465         .start  = c_start,
466         .next   = c_next,
467         .stop   = c_stop,
468         .show   = show_cpuinfo,
469 };
470
471 #ifdef CONFIG_PROC_HARDWARE
472 static int hardware_proc_show(struct seq_file *m, void *v)
473 {
474         char model[80];
475         unsigned long mem;
476         int i;
477
478         if (mach_get_model)
479                 mach_get_model(model);
480         else
481                 strcpy(model, "Unknown m68k");
482
483         seq_printf(m, "Model:\t\t%s\n", model);
484         for (mem = 0, i = 0; i < m68k_num_memory; i++)
485                 mem += m68k_memory[i].size;
486         seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
487
488         if (mach_get_hardware_list)
489                 mach_get_hardware_list(m);
490
491         return 0;
492 }
493
494 static int hardware_proc_open(struct inode *inode, struct file *file)
495 {
496         return single_open(file, hardware_proc_show, NULL);
497 }
498
499 static const struct file_operations hardware_proc_fops = {
500         .open           = hardware_proc_open,
501         .read           = seq_read,
502         .llseek         = seq_lseek,
503         .release        = single_release,
504 };
505
506 static int __init proc_hardware_init(void)
507 {
508         proc_create("hardware", 0, NULL, &hardware_proc_fops);
509         return 0;
510 }
511 module_init(proc_hardware_init);
512 #endif
513
514 void check_bugs(void)
515 {
516 #ifndef CONFIG_M68KFPU_EMU
517         if (m68k_fputype == 0) {
518                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
519                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
520                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
521                         "emulation project\n");
522                 panic("no FPU");
523         }
524 #endif /* !CONFIG_M68KFPU_EMU */
525 }
526
527 #ifdef CONFIG_ADB
528 static int __init adb_probe_sync_enable (char *str) {
529         extern int __adb_probe_sync;
530         __adb_probe_sync = 1;
531         return 1;
532 }
533
534 __setup("adb_sync", adb_probe_sync_enable);
535 #endif /* CONFIG_ADB */