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