setup.c (02e2407858fd62053bf60349c0e72cd1c7a4a60e) setup.c (66d857b08b8c3ed5c72c361f863cce77d2a978d7)
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#include <asm/natfeat.h>
46
47#if !FPSTATESIZE || !NR_IRQS
48#warning No CPU/platform type selected, your kernel will not work!
49#warning Are you building an allnoconfig kernel?
50#endif
51
52unsigned long m68k_machtype;
53EXPORT_SYMBOL(m68k_machtype);
54unsigned long m68k_cputype;
55EXPORT_SYMBOL(m68k_cputype);
56unsigned long m68k_fputype;
57unsigned long m68k_mmutype;
58EXPORT_SYMBOL(m68k_mmutype);
59#ifdef CONFIG_VME
60unsigned long vme_brdtype;
61EXPORT_SYMBOL(vme_brdtype);
62#endif
63
64int m68k_is040or060;
65EXPORT_SYMBOL(m68k_is040or060);
66
67extern unsigned long availmem;
68
69int m68k_num_memory;
70EXPORT_SYMBOL(m68k_num_memory);
71int m68k_realnum_memory;
72EXPORT_SYMBOL(m68k_realnum_memory);
73unsigned long m68k_memoffset;
74struct mem_info m68k_memory[NUM_MEMINFO];
75EXPORT_SYMBOL(m68k_memory);
76
77struct mem_info m68k_ramdisk;
78
79static char m68k_command_line[CL_SIZE];
80
81void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
82/* machine dependent irq functions */
83void (*mach_init_IRQ) (void) __initdata = NULL;
84void (*mach_get_model) (char *model);
85void (*mach_get_hardware_list) (struct seq_file *m);
86/* machine dependent timer functions */
87unsigned long (*mach_gettimeoffset) (void);
88int (*mach_hwclk) (int, struct rtc_time*);
89EXPORT_SYMBOL(mach_hwclk);
90int (*mach_set_clock_mmss) (unsigned long);
91unsigned int (*mach_get_ss)(void);
92int (*mach_get_rtc_pll)(struct rtc_pll_info *);
93int (*mach_set_rtc_pll)(struct rtc_pll_info *);
94EXPORT_SYMBOL(mach_get_ss);
95EXPORT_SYMBOL(mach_get_rtc_pll);
96EXPORT_SYMBOL(mach_set_rtc_pll);
97void (*mach_reset)( void );
98void (*mach_halt)( void );
99void (*mach_power_off)( void );
100long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
101#ifdef CONFIG_HEARTBEAT
102void (*mach_heartbeat) (int);
103EXPORT_SYMBOL(mach_heartbeat);
104#endif
105#ifdef CONFIG_M68K_L2_CACHE
106void (*mach_l2_flush) (int);
107#endif
108#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
109void (*mach_beep)(unsigned int, unsigned int);
110EXPORT_SYMBOL(mach_beep);
111#endif
112#if defined(CONFIG_ISA) && defined(MULTI_ISA)
113int isa_type;
114int isa_sex;
115EXPORT_SYMBOL(isa_type);
116EXPORT_SYMBOL(isa_sex);
117#endif
118
119extern int amiga_parse_bootinfo(const struct bi_record *);
120extern int atari_parse_bootinfo(const struct bi_record *);
121extern int mac_parse_bootinfo(const struct bi_record *);
122extern int q40_parse_bootinfo(const struct bi_record *);
123extern int bvme6000_parse_bootinfo(const struct bi_record *);
124extern int mvme16x_parse_bootinfo(const struct bi_record *);
125extern int mvme147_parse_bootinfo(const struct bi_record *);
126extern int hp300_parse_bootinfo(const struct bi_record *);
127extern int apollo_parse_bootinfo(const struct bi_record *);
128
129extern void config_amiga(void);
130extern void config_atari(void);
131extern void config_mac(void);
132extern void config_sun3(void);
133extern void config_apollo(void);
134extern void config_mvme147(void);
135extern void config_mvme16x(void);
136extern void config_bvme6000(void);
137extern void config_hp300(void);
138extern void config_q40(void);
139extern void config_sun3x(void);
140
141#define MASK_256K 0xfffc0000
142
143extern void paging_init(void);
144
145static void __init m68k_parse_bootinfo(const struct bi_record *record)
146{
147 while (record->tag != BI_LAST) {
148 int unknown = 0;
149 const unsigned long *data = record->data;
150
151 switch (record->tag) {
152 case BI_MACHTYPE:
153 case BI_CPUTYPE:
154 case BI_FPUTYPE:
155 case BI_MMUTYPE:
156 /* Already set up by head.S */
157 break;
158
159 case BI_MEMCHUNK:
160 if (m68k_num_memory < NUM_MEMINFO) {
161 m68k_memory[m68k_num_memory].addr = data[0];
162 m68k_memory[m68k_num_memory].size = data[1];
163 m68k_num_memory++;
164 } else
165 printk("m68k_parse_bootinfo: too many memory chunks\n");
166 break;
167
168 case BI_RAMDISK:
169 m68k_ramdisk.addr = data[0];
170 m68k_ramdisk.size = data[1];
171 break;
172
173 case BI_COMMAND_LINE:
174 strlcpy(m68k_command_line, (const char *)data,
175 sizeof(m68k_command_line));
176 break;
177
178 default:
179 if (MACH_IS_AMIGA)
180 unknown = amiga_parse_bootinfo(record);
181 else if (MACH_IS_ATARI)
182 unknown = atari_parse_bootinfo(record);
183 else if (MACH_IS_MAC)
184 unknown = mac_parse_bootinfo(record);
185 else if (MACH_IS_Q40)
186 unknown = q40_parse_bootinfo(record);
187 else if (MACH_IS_BVME6000)
188 unknown = bvme6000_parse_bootinfo(record);
189 else if (MACH_IS_MVME16x)
190 unknown = mvme16x_parse_bootinfo(record);
191 else if (MACH_IS_MVME147)
192 unknown = mvme147_parse_bootinfo(record);
193 else if (MACH_IS_HP300)
194 unknown = hp300_parse_bootinfo(record);
195 else if (MACH_IS_APOLLO)
196 unknown = apollo_parse_bootinfo(record);
197 else
198 unknown = 1;
199 }
200 if (unknown)
201 printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
202 record->tag);
203 record = (struct bi_record *)((unsigned long)record +
204 record->size);
205 }
206
207 m68k_realnum_memory = m68k_num_memory;
208#ifdef CONFIG_SINGLE_MEMORY_CHUNK
209 if (m68k_num_memory > 1) {
210 printk("Ignoring last %i chunks of physical memory\n",
211 (m68k_num_memory - 1));
212 m68k_num_memory = 1;
213 }
214#endif
215}
216
217void __init setup_arch(char **cmdline_p)
218{
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#ifdef CONFIG_NATFEAT
329 nf_init();
330#endif
331
332 paging_init();
333
334#ifndef CONFIG_SUN3
335 for (i = 1; i < m68k_num_memory; i++)
336 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
337 m68k_memory[i].size);
338#ifdef CONFIG_BLK_DEV_INITRD
339 if (m68k_ramdisk.size) {
340 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
341 m68k_ramdisk.addr, m68k_ramdisk.size,
342 BOOTMEM_DEFAULT);
343 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
344 initrd_end = initrd_start + m68k_ramdisk.size;
345 printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
346 }
347#endif
348
349#ifdef CONFIG_ATARI
350 if (MACH_IS_ATARI)
351 atari_stram_reserve_pages((void *)availmem);
352#endif
353#ifdef CONFIG_SUN3X
354 if (MACH_IS_SUN3X) {
355 dvma_init();
356 }
357#endif
358
359#endif /* !CONFIG_SUN3 */
360
361/* set ISA defs early as possible */
362#if defined(CONFIG_ISA) && defined(MULTI_ISA)
363 if (MACH_IS_Q40) {
364 isa_type = ISA_TYPE_Q40;
365 isa_sex = 0;
366 }
367#ifdef CONFIG_AMIGA_PCMCIA
368 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
369 isa_type = ISA_TYPE_AG;
370 isa_sex = 1;
371 }
372#endif
373#endif
374}
375
376static int show_cpuinfo(struct seq_file *m, void *v)
377{
378 const char *cpu, *mmu, *fpu;
379 unsigned long clockfreq, clockfactor;
380
381#define LOOP_CYCLES_68020 (8)
382#define LOOP_CYCLES_68030 (8)
383#define LOOP_CYCLES_68040 (3)
384#define LOOP_CYCLES_68060 (1)
385
386 if (CPU_IS_020) {
387 cpu = "68020";
388 clockfactor = LOOP_CYCLES_68020;
389 } else if (CPU_IS_030) {
390 cpu = "68030";
391 clockfactor = LOOP_CYCLES_68030;
392 } else if (CPU_IS_040) {
393 cpu = "68040";
394 clockfactor = LOOP_CYCLES_68040;
395 } else if (CPU_IS_060) {
396 cpu = "68060";
397 clockfactor = LOOP_CYCLES_68060;
398 } else {
399 cpu = "680x0";
400 clockfactor = 0;
401 }
402
403#ifdef CONFIG_M68KFPU_EMU_ONLY
404 fpu = "none(soft float)";
1#ifdef CONFIG_MMU
2#include "setup_mm.c"
405#else
3#else
406 if (m68k_fputype & FPU_68881)
407 fpu = "68881";
408 else if (m68k_fputype & FPU_68882)
409 fpu = "68882";
410 else if (m68k_fputype & FPU_68040)
411 fpu = "68040";
412 else if (m68k_fputype & FPU_68060)
413 fpu = "68060";
414 else if (m68k_fputype & FPU_SUNFPA)
415 fpu = "Sun FPA";
416 else
417 fpu = "none";
4#include "setup_no.c"
418#endif
5#endif
419
420 if (m68k_mmutype & MMU_68851)
421 mmu = "68851";
422 else if (m68k_mmutype & MMU_68030)
423 mmu = "68030";
424 else if (m68k_mmutype & MMU_68040)
425 mmu = "68040";
426 else if (m68k_mmutype & MMU_68060)
427 mmu = "68060";
428 else if (m68k_mmutype & MMU_SUN3)
429 mmu = "Sun-3";
430 else if (m68k_mmutype & MMU_APOLLO)
431 mmu = "Apollo";
432 else
433 mmu = "unknown";
434
435 clockfreq = loops_per_jiffy * HZ * clockfactor;
436
437 seq_printf(m, "CPU:\t\t%s\n"
438 "MMU:\t\t%s\n"
439 "FPU:\t\t%s\n"
440 "Clocking:\t%lu.%1luMHz\n"
441 "BogoMips:\t%lu.%02lu\n"
442 "Calibration:\t%lu loops\n",
443 cpu, mmu, fpu,
444 clockfreq/1000000,(clockfreq/100000)%10,
445 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
446 loops_per_jiffy);
447 return 0;
448}
449
450static void *c_start(struct seq_file *m, loff_t *pos)
451{
452 return *pos < 1 ? (void *)1 : NULL;
453}
454static void *c_next(struct seq_file *m, void *v, loff_t *pos)
455{
456 ++*pos;
457 return NULL;
458}
459static void c_stop(struct seq_file *m, void *v)
460{
461}
462const struct seq_operations cpuinfo_op = {
463 .start = c_start,
464 .next = c_next,
465 .stop = c_stop,
466 .show = show_cpuinfo,
467};
468
469#ifdef CONFIG_PROC_HARDWARE
470static int hardware_proc_show(struct seq_file *m, void *v)
471{
472 char model[80];
473 unsigned long mem;
474 int i;
475
476 if (mach_get_model)
477 mach_get_model(model);
478 else
479 strcpy(model, "Unknown m68k");
480
481 seq_printf(m, "Model:\t\t%s\n", model);
482 for (mem = 0, i = 0; i < m68k_num_memory; i++)
483 mem += m68k_memory[i].size;
484 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
485
486 if (mach_get_hardware_list)
487 mach_get_hardware_list(m);
488
489 return 0;
490}
491
492static int hardware_proc_open(struct inode *inode, struct file *file)
493{
494 return single_open(file, hardware_proc_show, NULL);
495}
496
497static const struct file_operations hardware_proc_fops = {
498 .open = hardware_proc_open,
499 .read = seq_read,
500 .llseek = seq_lseek,
501 .release = single_release,
502};
503
504static int __init proc_hardware_init(void)
505{
506 proc_create("hardware", 0, NULL, &hardware_proc_fops);
507 return 0;
508}
509module_init(proc_hardware_init);
510#endif
511
512void check_bugs(void)
513{
514#ifndef CONFIG_M68KFPU_EMU
515 if (m68k_fputype == 0) {
516 printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
517 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
518 printk(KERN_EMERG "Upgrade your hardware or join the FPU "
519 "emulation project\n");
520 panic("no FPU");
521 }
522#endif /* !CONFIG_M68KFPU_EMU */
523}
524
525#ifdef CONFIG_ADB
526static int __init adb_probe_sync_enable (char *str) {
527 extern int __adb_probe_sync;
528 __adb_probe_sync = 1;
529 return 1;
530}
531
532__setup("adb_sync", adb_probe_sync_enable);
533#endif /* CONFIG_ADB */