ia64: allocate percpu area for cpu0 like percpu areas for other cpus
[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/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
46 #if !FPSTATESIZE || !NR_IRQS
47 #warning No CPU/platform type selected, your kernel will not work!
48 #warning Are you building an allnoconfig kernel?
49 #endif
50
51 unsigned long m68k_machtype;
52 EXPORT_SYMBOL(m68k_machtype);
53 unsigned long m68k_cputype;
54 EXPORT_SYMBOL(m68k_cputype);
55 unsigned long m68k_fputype;
56 unsigned long m68k_mmutype;
57 EXPORT_SYMBOL(m68k_mmutype);
58 #ifdef CONFIG_VME
59 unsigned long vme_brdtype;
60 EXPORT_SYMBOL(vme_brdtype);
61 #endif
62
63 int m68k_is040or060;
64 EXPORT_SYMBOL(m68k_is040or060);
65
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         int i;
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_early_param();
262
263 #ifdef CONFIG_DUMMY_CONSOLE
264         conswitchp = &dummy_con;
265 #endif
266
267         switch (m68k_machtype) {
268 #ifdef CONFIG_AMIGA
269         case MACH_AMIGA:
270                 config_amiga();
271                 break;
272 #endif
273 #ifdef CONFIG_ATARI
274         case MACH_ATARI:
275                 config_atari();
276                 break;
277 #endif
278 #ifdef CONFIG_MAC
279         case MACH_MAC:
280                 config_mac();
281                 break;
282 #endif
283 #ifdef CONFIG_SUN3
284         case MACH_SUN3:
285                 config_sun3();
286                 break;
287 #endif
288 #ifdef CONFIG_APOLLO
289         case MACH_APOLLO:
290                 config_apollo();
291                 break;
292 #endif
293 #ifdef CONFIG_MVME147
294         case MACH_MVME147:
295                 config_mvme147();
296                 break;
297 #endif
298 #ifdef CONFIG_MVME16x
299         case MACH_MVME16x:
300                 config_mvme16x();
301                 break;
302 #endif
303 #ifdef CONFIG_BVME6000
304         case MACH_BVME6000:
305                 config_bvme6000();
306                 break;
307 #endif
308 #ifdef CONFIG_HP300
309         case MACH_HP300:
310                 config_hp300();
311                 break;
312 #endif
313 #ifdef CONFIG_Q40
314         case MACH_Q40:
315                 config_q40();
316                 break;
317 #endif
318 #ifdef CONFIG_SUN3X
319         case MACH_SUN3X:
320                 config_sun3x();
321                 break;
322 #endif
323         default:
324                 panic("No configuration setup");
325         }
326
327         paging_init();
328
329 #ifndef CONFIG_SUN3
330         for (i = 1; i < m68k_num_memory; i++)
331                 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
332                                   m68k_memory[i].size);
333 #ifdef CONFIG_BLK_DEV_INITRD
334         if (m68k_ramdisk.size) {
335                 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
336                                      m68k_ramdisk.addr, m68k_ramdisk.size,
337                                      BOOTMEM_DEFAULT);
338                 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
339                 initrd_end = initrd_start + m68k_ramdisk.size;
340                 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
341         }
342 #endif
343
344 #ifdef CONFIG_ATARI
345         if (MACH_IS_ATARI)
346                 atari_stram_reserve_pages((void *)availmem);
347 #endif
348 #ifdef CONFIG_SUN3X
349         if (MACH_IS_SUN3X) {
350                 dvma_init();
351         }
352 #endif
353
354 #endif /* !CONFIG_SUN3 */
355
356 /* set ISA defs early as possible */
357 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
358         if (MACH_IS_Q40) {
359                 isa_type = ISA_TYPE_Q40;
360                 isa_sex = 0;
361         }
362 #ifdef CONFIG_GG2
363         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
364                 isa_type = ISA_TYPE_GG2;
365                 isa_sex = 0;
366         }
367 #endif
368 #ifdef CONFIG_AMIGA_PCMCIA
369         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
370                 isa_type = ISA_TYPE_AG;
371                 isa_sex = 1;
372         }
373 #endif
374 #endif
375 }
376
377 static int show_cpuinfo(struct seq_file *m, void *v)
378 {
379         const char *cpu, *mmu, *fpu;
380         unsigned long clockfreq, clockfactor;
381
382 #define LOOP_CYCLES_68020       (8)
383 #define LOOP_CYCLES_68030       (8)
384 #define LOOP_CYCLES_68040       (3)
385 #define LOOP_CYCLES_68060       (1)
386
387         if (CPU_IS_020) {
388                 cpu = "68020";
389                 clockfactor = LOOP_CYCLES_68020;
390         } else if (CPU_IS_030) {
391                 cpu = "68030";
392                 clockfactor = LOOP_CYCLES_68030;
393         } else if (CPU_IS_040) {
394                 cpu = "68040";
395                 clockfactor = LOOP_CYCLES_68040;
396         } else if (CPU_IS_060) {
397                 cpu = "68060";
398                 clockfactor = LOOP_CYCLES_68060;
399         } else {
400                 cpu = "680x0";
401                 clockfactor = 0;
402         }
403
404 #ifdef CONFIG_M68KFPU_EMU_ONLY
405         fpu = "none(soft float)";
406 #else
407         if (m68k_fputype & FPU_68881)
408                 fpu = "68881";
409         else if (m68k_fputype & FPU_68882)
410                 fpu = "68882";
411         else if (m68k_fputype & FPU_68040)
412                 fpu = "68040";
413         else if (m68k_fputype & FPU_68060)
414                 fpu = "68060";
415         else if (m68k_fputype & FPU_SUNFPA)
416                 fpu = "Sun FPA";
417         else
418                 fpu = "none";
419 #endif
420
421         if (m68k_mmutype & MMU_68851)
422                 mmu = "68851";
423         else if (m68k_mmutype & MMU_68030)
424                 mmu = "68030";
425         else if (m68k_mmutype & MMU_68040)
426                 mmu = "68040";
427         else if (m68k_mmutype & MMU_68060)
428                 mmu = "68060";
429         else if (m68k_mmutype & MMU_SUN3)
430                 mmu = "Sun-3";
431         else if (m68k_mmutype & MMU_APOLLO)
432                 mmu = "Apollo";
433         else
434                 mmu = "unknown";
435
436         clockfreq = loops_per_jiffy * HZ * clockfactor;
437
438         seq_printf(m, "CPU:\t\t%s\n"
439                    "MMU:\t\t%s\n"
440                    "FPU:\t\t%s\n"
441                    "Clocking:\t%lu.%1luMHz\n"
442                    "BogoMips:\t%lu.%02lu\n"
443                    "Calibration:\t%lu loops\n",
444                    cpu, mmu, fpu,
445                    clockfreq/1000000,(clockfreq/100000)%10,
446                    loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
447                    loops_per_jiffy);
448         return 0;
449 }
450
451 static void *c_start(struct seq_file *m, loff_t *pos)
452 {
453         return *pos < 1 ? (void *)1 : NULL;
454 }
455 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
456 {
457         ++*pos;
458         return NULL;
459 }
460 static void c_stop(struct seq_file *m, void *v)
461 {
462 }
463 const struct seq_operations cpuinfo_op = {
464         .start  = c_start,
465         .next   = c_next,
466         .stop   = c_stop,
467         .show   = show_cpuinfo,
468 };
469
470 #ifdef CONFIG_PROC_HARDWARE
471 static int hardware_proc_show(struct seq_file *m, void *v)
472 {
473         char model[80];
474         unsigned long mem;
475         int i;
476
477         if (mach_get_model)
478                 mach_get_model(model);
479         else
480                 strcpy(model, "Unknown m68k");
481
482         seq_printf(m, "Model:\t\t%s\n", model);
483         for (mem = 0, i = 0; i < m68k_num_memory; i++)
484                 mem += m68k_memory[i].size;
485         seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
486
487         if (mach_get_hardware_list)
488                 mach_get_hardware_list(m);
489
490         return 0;
491 }
492
493 static int hardware_proc_open(struct inode *inode, struct file *file)
494 {
495         return single_open(file, hardware_proc_show, NULL);
496 }
497
498 static const struct file_operations hardware_proc_fops = {
499         .open           = hardware_proc_open,
500         .read           = seq_read,
501         .llseek         = seq_lseek,
502         .release        = single_release,
503 };
504
505 static int __init proc_hardware_init(void)
506 {
507         proc_create("hardware", 0, NULL, &hardware_proc_fops);
508         return 0;
509 }
510 module_init(proc_hardware_init);
511 #endif
512
513 void check_bugs(void)
514 {
515 #ifndef CONFIG_M68KFPU_EMU
516         if (m68k_fputype == 0) {
517                 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
518                         "WHICH IS REQUIRED BY LINUX/M68K ***\n");
519                 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
520                         "emulation project\n");
521                 panic("no FPU");
522         }
523 #endif /* !CONFIG_M68KFPU_EMU */
524 }
525
526 #ifdef CONFIG_ADB
527 static int __init adb_probe_sync_enable (char *str) {
528         extern int __adb_probe_sync;
529         __adb_probe_sync = 1;
530         return 1;
531 }
532
533 __setup("adb_sync", adb_probe_sync_enable);
534 #endif /* CONFIG_ADB */