1
2
3
4
5
6
7
8
9
10
11
12#include <linux/kernel.h>
13#include <linux/mm.h>
14#include <linux/sched.h>
15#include <linux/delay.h>
16#include <linux/interrupt.h>
17#include <linux/fs.h>
18#include <linux/console.h>
19#include <linux/genhd.h>
20#include <linux/errno.h>
21#include <linux/string.h>
22#include <linux/init.h>
23#include <linux/memblock.h>
24#include <linux/proc_fs.h>
25#include <linux/seq_file.h>
26#include <linux/module.h>
27#include <linux/nvram.h>
28#include <linux/initrd.h>
29
30#include <asm/bootinfo.h>
31#include <asm/byteorder.h>
32#include <asm/sections.h>
33#include <asm/setup.h>
34#include <asm/fpu.h>
35#include <asm/irq.h>
36#include <asm/io.h>
37#include <asm/machdep.h>
38#ifdef CONFIG_AMIGA
39#include <asm/amigahw.h>
40#endif
41#include <asm/atarihw.h>
42#ifdef CONFIG_ATARI
43#include <asm/atari_stram.h>
44#endif
45#ifdef CONFIG_SUN3X
46#include <asm/dvma.h>
47#endif
48#include <asm/macintosh.h>
49#include <asm/natfeat.h>
50
51#if !FPSTATESIZE || !NR_IRQS
52#warning No CPU/platform type selected, your kernel will not work!
53#warning Are you building an allnoconfig kernel?
54#endif
55
56unsigned long m68k_machtype;
57EXPORT_SYMBOL(m68k_machtype);
58unsigned long m68k_cputype;
59EXPORT_SYMBOL(m68k_cputype);
60unsigned long m68k_fputype;
61unsigned long m68k_mmutype;
62EXPORT_SYMBOL(m68k_mmutype);
63#ifdef CONFIG_VME
64unsigned long vme_brdtype;
65EXPORT_SYMBOL(vme_brdtype);
66#endif
67
68int m68k_is040or060;
69EXPORT_SYMBOL(m68k_is040or060);
70
71extern unsigned long availmem;
72
73int m68k_num_memory;
74EXPORT_SYMBOL(m68k_num_memory);
75int m68k_realnum_memory;
76EXPORT_SYMBOL(m68k_realnum_memory);
77unsigned long m68k_memoffset;
78struct m68k_mem_info m68k_memory[NUM_MEMINFO];
79EXPORT_SYMBOL(m68k_memory);
80
81static struct m68k_mem_info m68k_ramdisk __initdata;
82
83static char m68k_command_line[CL_SIZE] __initdata;
84
85void (*mach_sched_init) (void) __initdata = NULL;
86
87void (*mach_init_IRQ) (void) __initdata = NULL;
88void (*mach_get_model) (char *model);
89void (*mach_get_hardware_list) (struct seq_file *m);
90
91int (*mach_hwclk) (int, struct rtc_time*);
92EXPORT_SYMBOL(mach_hwclk);
93unsigned int (*mach_get_ss)(void);
94int (*mach_get_rtc_pll)(struct rtc_pll_info *);
95int (*mach_set_rtc_pll)(struct rtc_pll_info *);
96EXPORT_SYMBOL(mach_get_ss);
97EXPORT_SYMBOL(mach_get_rtc_pll);
98EXPORT_SYMBOL(mach_set_rtc_pll);
99void (*mach_reset)( void );
100void (*mach_halt)( void );
101void (*mach_power_off)( void );
102#ifdef CONFIG_HEARTBEAT
103void (*mach_heartbeat) (int);
104EXPORT_SYMBOL(mach_heartbeat);
105#endif
106#ifdef CONFIG_M68K_L2_CACHE
107void (*mach_l2_flush) (int);
108#endif
109#if defined(CONFIG_ISA) && defined(MULTI_ISA)
110int isa_type;
111int isa_sex;
112EXPORT_SYMBOL(isa_type);
113EXPORT_SYMBOL(isa_sex);
114#endif
115
116extern int amiga_parse_bootinfo(const struct bi_record *);
117extern int atari_parse_bootinfo(const struct bi_record *);
118extern int mac_parse_bootinfo(const struct bi_record *);
119extern int q40_parse_bootinfo(const struct bi_record *);
120extern int bvme6000_parse_bootinfo(const struct bi_record *);
121extern int mvme16x_parse_bootinfo(const struct bi_record *);
122extern int mvme147_parse_bootinfo(const struct bi_record *);
123extern int hp300_parse_bootinfo(const struct bi_record *);
124extern int apollo_parse_bootinfo(const struct bi_record *);
125
126extern void config_amiga(void);
127extern void config_atari(void);
128extern void config_mac(void);
129extern void config_sun3(void);
130extern void config_apollo(void);
131extern void config_mvme147(void);
132extern void config_mvme16x(void);
133extern void config_bvme6000(void);
134extern void config_hp300(void);
135extern void config_q40(void);
136extern void config_sun3x(void);
137
138#define MASK_256K 0xfffc0000
139
140extern void paging_init(void);
141
142static void __init m68k_parse_bootinfo(const struct bi_record *record)
143{
144 uint16_t tag;
145
146 save_bootinfo(record);
147
148 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
149 int unknown = 0;
150 const void *data = record->data;
151 uint16_t size = be16_to_cpu(record->size);
152
153 switch (tag) {
154 case BI_MACHTYPE:
155 case BI_CPUTYPE:
156 case BI_FPUTYPE:
157 case BI_MMUTYPE:
158
159 break;
160
161 case BI_MEMCHUNK:
162 if (m68k_num_memory < NUM_MEMINFO) {
163 const struct mem_info *m = data;
164 m68k_memory[m68k_num_memory].addr =
165 be32_to_cpu(m->addr);
166 m68k_memory[m68k_num_memory].size =
167 be32_to_cpu(m->size);
168 m68k_num_memory++;
169 } else
170 pr_warn("%s: too many memory chunks\n",
171 __func__);
172 break;
173
174 case BI_RAMDISK:
175 {
176 const struct mem_info *m = data;
177 m68k_ramdisk.addr = be32_to_cpu(m->addr);
178 m68k_ramdisk.size = be32_to_cpu(m->size);
179 }
180 break;
181
182 case BI_COMMAND_LINE:
183 strlcpy(m68k_command_line, data,
184 sizeof(m68k_command_line));
185 break;
186
187 default:
188 if (MACH_IS_AMIGA)
189 unknown = amiga_parse_bootinfo(record);
190 else if (MACH_IS_ATARI)
191 unknown = atari_parse_bootinfo(record);
192 else if (MACH_IS_MAC)
193 unknown = mac_parse_bootinfo(record);
194 else if (MACH_IS_Q40)
195 unknown = q40_parse_bootinfo(record);
196 else if (MACH_IS_BVME6000)
197 unknown = bvme6000_parse_bootinfo(record);
198 else if (MACH_IS_MVME16x)
199 unknown = mvme16x_parse_bootinfo(record);
200 else if (MACH_IS_MVME147)
201 unknown = mvme147_parse_bootinfo(record);
202 else if (MACH_IS_HP300)
203 unknown = hp300_parse_bootinfo(record);
204 else if (MACH_IS_APOLLO)
205 unknown = apollo_parse_bootinfo(record);
206 else
207 unknown = 1;
208 }
209 if (unknown)
210 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
211 tag);
212 record = (struct bi_record *)((unsigned long)record + size);
213 }
214
215 m68k_realnum_memory = m68k_num_memory;
216#ifdef CONFIG_SINGLE_MEMORY_CHUNK
217 if (m68k_num_memory > 1) {
218 pr_warn("%s: ignoring last %i chunks of physical memory\n",
219 __func__, (m68k_num_memory - 1));
220 m68k_num_memory = 1;
221 }
222#endif
223}
224
225void __init setup_arch(char **cmdline_p)
226{
227
228 if (!CPU_IS_COLDFIRE)
229 m68k_parse_bootinfo((const struct bi_record *)_end);
230
231 if (CPU_IS_040)
232 m68k_is040or060 = 4;
233 else if (CPU_IS_060)
234 m68k_is040or060 = 6;
235
236
237
238
239
240
241#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
242
243 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
244 volatile int zero = 0;
245 asm volatile ("frestore %0" : : "m" (zero));
246 }
247#endif
248
249 if (CPU_IS_060) {
250 u32 pcr;
251
252 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
253 : "=d" (pcr));
254 if (((pcr >> 8) & 0xff) <= 5) {
255 pr_warn("Enabling workaround for errata I14\n");
256 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
257 : : "d" (pcr | 0x20));
258 }
259 }
260
261 setup_initial_init_mm((void *)PAGE_OFFSET, _etext, _edata, _end);
262
263#if defined(CONFIG_BOOTPARAM)
264 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
265 m68k_command_line[CL_SIZE - 1] = 0;
266#endif
267 process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
268 *cmdline_p = m68k_command_line;
269 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
270
271 parse_early_param();
272
273 switch (m68k_machtype) {
274#ifdef CONFIG_AMIGA
275 case MACH_AMIGA:
276 config_amiga();
277 break;
278#endif
279#ifdef CONFIG_ATARI
280 case MACH_ATARI:
281 config_atari();
282 break;
283#endif
284#ifdef CONFIG_MAC
285 case MACH_MAC:
286 config_mac();
287 break;
288#endif
289#ifdef CONFIG_SUN3
290 case MACH_SUN3:
291 config_sun3();
292 break;
293#endif
294#ifdef CONFIG_APOLLO
295 case MACH_APOLLO:
296 config_apollo();
297 break;
298#endif
299#ifdef CONFIG_MVME147
300 case MACH_MVME147:
301 config_mvme147();
302 break;
303#endif
304#ifdef CONFIG_MVME16x
305 case MACH_MVME16x:
306 config_mvme16x();
307 break;
308#endif
309#ifdef CONFIG_BVME6000
310 case MACH_BVME6000:
311 config_bvme6000();
312 break;
313#endif
314#ifdef CONFIG_HP300
315 case MACH_HP300:
316 config_hp300();
317 break;
318#endif
319#ifdef CONFIG_Q40
320 case MACH_Q40:
321 config_q40();
322 break;
323#endif
324#ifdef CONFIG_SUN3X
325 case MACH_SUN3X:
326 config_sun3x();
327 break;
328#endif
329#ifdef CONFIG_COLDFIRE
330 case MACH_M54XX:
331 case MACH_M5441X:
332 cf_bootmem_alloc();
333 cf_mmu_context_init();
334 config_BSP(NULL, 0);
335 break;
336#endif
337 default:
338 panic("No configuration setup");
339 }
340
341#ifdef CONFIG_BLK_DEV_INITRD
342 if (m68k_ramdisk.size) {
343 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
344 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
345 initrd_end = initrd_start + m68k_ramdisk.size;
346 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
347 }
348#endif
349
350 paging_init();
351
352#ifdef CONFIG_NATFEAT
353 nf_init();
354#endif
355
356#ifdef CONFIG_ATARI
357 if (MACH_IS_ATARI)
358 atari_stram_reserve_pages((void *)availmem);
359#endif
360#ifdef CONFIG_SUN3X
361 if (MACH_IS_SUN3X) {
362 dvma_init();
363 }
364#endif
365
366
367#if defined(CONFIG_ISA) && defined(MULTI_ISA)
368 if (MACH_IS_Q40) {
369 isa_type = ISA_TYPE_Q40;
370 isa_sex = 0;
371 }
372#ifdef CONFIG_AMIGA_PCMCIA
373 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
374 isa_type = ISA_TYPE_AG;
375 isa_sex = 1;
376 }
377#endif
378#ifdef CONFIG_ATARI_ROM_ISA
379 if (MACH_IS_ATARI) {
380 isa_type = ISA_TYPE_ENEC;
381 isa_sex = 0;
382 }
383#endif
384#endif
385}
386
387static int show_cpuinfo(struct seq_file *m, void *v)
388{
389 const char *cpu, *mmu, *fpu;
390 unsigned long clockfreq, clockfactor;
391
392#define LOOP_CYCLES_68020 (8)
393#define LOOP_CYCLES_68030 (8)
394#define LOOP_CYCLES_68040 (3)
395#define LOOP_CYCLES_68060 (1)
396#define LOOP_CYCLES_COLDFIRE (2)
397
398 if (CPU_IS_020) {
399 cpu = "68020";
400 clockfactor = LOOP_CYCLES_68020;
401 } else if (CPU_IS_030) {
402 cpu = "68030";
403 clockfactor = LOOP_CYCLES_68030;
404 } else if (CPU_IS_040) {
405 cpu = "68040";
406 clockfactor = LOOP_CYCLES_68040;
407 } else if (CPU_IS_060) {
408 cpu = "68060";
409 clockfactor = LOOP_CYCLES_68060;
410 } else if (CPU_IS_COLDFIRE) {
411 cpu = "ColdFire";
412 clockfactor = LOOP_CYCLES_COLDFIRE;
413 } else {
414 cpu = "680x0";
415 clockfactor = 0;
416 }
417
418#ifdef CONFIG_M68KFPU_EMU_ONLY
419 fpu = "none(soft float)";
420#else
421 if (m68k_fputype & FPU_68881)
422 fpu = "68881";
423 else if (m68k_fputype & FPU_68882)
424 fpu = "68882";
425 else if (m68k_fputype & FPU_68040)
426 fpu = "68040";
427 else if (m68k_fputype & FPU_68060)
428 fpu = "68060";
429 else if (m68k_fputype & FPU_SUNFPA)
430 fpu = "Sun FPA";
431 else if (m68k_fputype & FPU_COLDFIRE)
432 fpu = "ColdFire";
433 else
434 fpu = "none";
435#endif
436
437 if (m68k_mmutype & MMU_68851)
438 mmu = "68851";
439 else if (m68k_mmutype & MMU_68030)
440 mmu = "68030";
441 else if (m68k_mmutype & MMU_68040)
442 mmu = "68040";
443 else if (m68k_mmutype & MMU_68060)
444 mmu = "68060";
445 else if (m68k_mmutype & MMU_SUN3)
446 mmu = "Sun-3";
447 else if (m68k_mmutype & MMU_APOLLO)
448 mmu = "Apollo";
449 else if (m68k_mmutype & MMU_COLDFIRE)
450 mmu = "ColdFire";
451 else
452 mmu = "unknown";
453
454 clockfreq = loops_per_jiffy * HZ * clockfactor;
455
456 seq_printf(m, "CPU:\t\t%s\n"
457 "MMU:\t\t%s\n"
458 "FPU:\t\t%s\n"
459 "Clocking:\t%lu.%1luMHz\n"
460 "BogoMips:\t%lu.%02lu\n"
461 "Calibration:\t%lu loops\n",
462 cpu, mmu, fpu,
463 clockfreq/1000000,(clockfreq/100000)%10,
464 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
465 loops_per_jiffy);
466 return 0;
467}
468
469static void *c_start(struct seq_file *m, loff_t *pos)
470{
471 return *pos < 1 ? (void *)1 : NULL;
472}
473static void *c_next(struct seq_file *m, void *v, loff_t *pos)
474{
475 ++*pos;
476 return NULL;
477}
478static void c_stop(struct seq_file *m, void *v)
479{
480}
481const struct seq_operations cpuinfo_op = {
482 .start = c_start,
483 .next = c_next,
484 .stop = c_stop,
485 .show = show_cpuinfo,
486};
487
488#ifdef CONFIG_PROC_HARDWARE
489static int hardware_proc_show(struct seq_file *m, void *v)
490{
491 char model[80];
492 unsigned long mem;
493 int i;
494
495 if (mach_get_model)
496 mach_get_model(model);
497 else
498 strcpy(model, "Unknown m68k");
499
500 seq_printf(m, "Model:\t\t%s\n", model);
501 for (mem = 0, i = 0; i < m68k_num_memory; i++)
502 mem += m68k_memory[i].size;
503 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
504
505 if (mach_get_hardware_list)
506 mach_get_hardware_list(m);
507
508 return 0;
509}
510
511static int __init proc_hardware_init(void)
512{
513 proc_create_single("hardware", 0, NULL, hardware_proc_show);
514 return 0;
515}
516module_init(proc_hardware_init);
517#endif
518
519void check_bugs(void)
520{
521#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
522 if (m68k_fputype == 0) {
523 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
524 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
525 pr_emerg("Upgrade your hardware or join the FPU "
526 "emulation project\n");
527 panic("no FPU");
528 }
529#endif
530}
531
532#ifdef CONFIG_ADB
533static int __init adb_probe_sync_enable (char *str) {
534 extern int __adb_probe_sync;
535 __adb_probe_sync = 1;
536 return 1;
537}
538
539__setup("adb_sync", adb_probe_sync_enable);
540#endif
541
542#if IS_ENABLED(CONFIG_NVRAM)
543#ifdef CONFIG_MAC
544static unsigned char m68k_nvram_read_byte(int addr)
545{
546 if (MACH_IS_MAC)
547 return mac_pram_read_byte(addr);
548 return 0xff;
549}
550
551static void m68k_nvram_write_byte(unsigned char val, int addr)
552{
553 if (MACH_IS_MAC)
554 mac_pram_write_byte(val, addr);
555}
556#endif
557
558#ifdef CONFIG_ATARI
559static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos)
560{
561 if (MACH_IS_ATARI)
562 return atari_nvram_read(buf, count, ppos);
563 else if (MACH_IS_MAC)
564 return nvram_read_bytes(buf, count, ppos);
565 return -EINVAL;
566}
567
568static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos)
569{
570 if (MACH_IS_ATARI)
571 return atari_nvram_write(buf, count, ppos);
572 else if (MACH_IS_MAC)
573 return nvram_write_bytes(buf, count, ppos);
574 return -EINVAL;
575}
576
577static long m68k_nvram_set_checksum(void)
578{
579 if (MACH_IS_ATARI)
580 return atari_nvram_set_checksum();
581 return -EINVAL;
582}
583
584static long m68k_nvram_initialize(void)
585{
586 if (MACH_IS_ATARI)
587 return atari_nvram_initialize();
588 return -EINVAL;
589}
590#endif
591
592static ssize_t m68k_nvram_get_size(void)
593{
594 if (MACH_IS_ATARI)
595 return atari_nvram_get_size();
596 else if (MACH_IS_MAC)
597 return mac_pram_get_size();
598 return -ENODEV;
599}
600
601
602
603
604const struct nvram_ops arch_nvram_ops = {
605#ifdef CONFIG_MAC
606 .read_byte = m68k_nvram_read_byte,
607 .write_byte = m68k_nvram_write_byte,
608#endif
609#ifdef CONFIG_ATARI
610 .read = m68k_nvram_read,
611 .write = m68k_nvram_write,
612 .set_checksum = m68k_nvram_set_checksum,
613 .initialize = m68k_nvram_initialize,
614#endif
615 .get_size = m68k_nvram_get_size,
616};
617EXPORT_SYMBOL(arch_nvram_ops);
618#endif
619
