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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/arch/m68k/kernel/setup.c
4 *
5 * Copyright (C) 1995 Hamish Macdonald
6 */
7
8/*
9 * This file handles the architecture-dependent parts of system setup
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) (irq_handler_t handler) __initdata = NULL;
86/* machine dependent irq functions */
87void (*mach_init_IRQ) (void) __initdata = NULL;
88void (*mach_get_model) (char *model);
89void (*mach_get_hardware_list) (struct seq_file *m);
90/* machine dependent timer functions */
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 );
102long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
103#ifdef CONFIG_HEARTBEAT
104void (*mach_heartbeat) (int);
105EXPORT_SYMBOL(mach_heartbeat);
106#endif
107#ifdef CONFIG_M68K_L2_CACHE
108void (*mach_l2_flush) (int);
109#endif
110#if defined(CONFIG_ISA) && defined(MULTI_ISA)
111int isa_type;
112int isa_sex;
113EXPORT_SYMBOL(isa_type);
114EXPORT_SYMBOL(isa_sex);
115#endif
116
117extern int amiga_parse_bootinfo(const struct bi_record *);
118extern int atari_parse_bootinfo(const struct bi_record *);
119extern int mac_parse_bootinfo(const struct bi_record *);
120extern int q40_parse_bootinfo(const struct bi_record *);
121extern int bvme6000_parse_bootinfo(const struct bi_record *);
122extern int mvme16x_parse_bootinfo(const struct bi_record *);
123extern int mvme147_parse_bootinfo(const struct bi_record *);
124extern int hp300_parse_bootinfo(const struct bi_record *);
125extern int apollo_parse_bootinfo(const struct bi_record *);
126
127extern void config_amiga(void);
128extern void config_atari(void);
129extern void config_mac(void);
130extern void config_sun3(void);
131extern void config_apollo(void);
132extern void config_mvme147(void);
133extern void config_mvme16x(void);
134extern void config_bvme6000(void);
135extern void config_hp300(void);
136extern void config_q40(void);
137extern void config_sun3x(void);
138
139#define MASK_256K 0xfffc0000
140
141extern void paging_init(void);
142
143static void __init m68k_parse_bootinfo(const struct bi_record *record)
144{
145 uint16_t tag;
146
147 save_bootinfo(record);
148
149 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
150 int unknown = 0;
151 const void *data = record->data;
152 uint16_t size = be16_to_cpu(record->size);
153
154 switch (tag) {
155 case BI_MACHTYPE:
156 case BI_CPUTYPE:
157 case BI_FPUTYPE:
158 case BI_MMUTYPE:
159 /* Already set up by head.S */
160 break;
161
162 case BI_MEMCHUNK:
163 if (m68k_num_memory < NUM_MEMINFO) {
164 const struct mem_info *m = data;
165 m68k_memory[m68k_num_memory].addr =
166 be32_to_cpu(m->addr);
167 m68k_memory[m68k_num_memory].size =
168 be32_to_cpu(m->size);
169 m68k_num_memory++;
170 } else
171 pr_warn("%s: too many memory chunks\n",
172 __func__);
173 break;
174
175 case BI_RAMDISK:
176 {
177 const struct mem_info *m = data;
178 m68k_ramdisk.addr = be32_to_cpu(m->addr);
179 m68k_ramdisk.size = be32_to_cpu(m->size);
180 }
181 break;
182
183 case BI_COMMAND_LINE:
184 strlcpy(m68k_command_line, data,
185 sizeof(m68k_command_line));
186 break;
187
188 default:
189 if (MACH_IS_AMIGA)
190 unknown = amiga_parse_bootinfo(record);
191 else if (MACH_IS_ATARI)
192 unknown = atari_parse_bootinfo(record);
193 else if (MACH_IS_MAC)
194 unknown = mac_parse_bootinfo(record);
195 else if (MACH_IS_Q40)
196 unknown = q40_parse_bootinfo(record);
197 else if (MACH_IS_BVME6000)
198 unknown = bvme6000_parse_bootinfo(record);
199 else if (MACH_IS_MVME16x)
200 unknown = mvme16x_parse_bootinfo(record);
201 else if (MACH_IS_MVME147)
202 unknown = mvme147_parse_bootinfo(record);
203 else if (MACH_IS_HP300)
204 unknown = hp300_parse_bootinfo(record);
205 else if (MACH_IS_APOLLO)
206 unknown = apollo_parse_bootinfo(record);
207 else
208 unknown = 1;
209 }
210 if (unknown)
211 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
212 tag);
213 record = (struct bi_record *)((unsigned long)record + size);
214 }
215
216 m68k_realnum_memory = m68k_num_memory;
217#ifdef CONFIG_SINGLE_MEMORY_CHUNK
218 if (m68k_num_memory > 1) {
219 pr_warn("%s: ignoring last %i chunks of physical memory\n",
220 __func__, (m68k_num_memory - 1));
221 m68k_num_memory = 1;
222 }
223#endif
224}
225
226void __init setup_arch(char **cmdline_p)
227{
228 /* The bootinfo is located right after the kernel */
229 if (!CPU_IS_COLDFIRE)
230 m68k_parse_bootinfo((const struct bi_record *)_end);
231
232 if (CPU_IS_040)
233 m68k_is040or060 = 4;
234 else if (CPU_IS_060)
235 m68k_is040or060 = 6;
236
237 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
238 * be confused by software FPU emulation. BEWARE.
239 * We should really do our own FPU check at startup.
240 * [what do we do with buggy 68LC040s? if we have problems
241 * with them, we should add a test to check_bugs() below] */
242#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
243 /* clear the fpu if we have one */
244 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
245 volatile int zero = 0;
246 asm volatile ("frestore %0" : : "m" (zero));
247 }
248#endif
249
250 if (CPU_IS_060) {
251 u32 pcr;
252
253 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
254 : "=d" (pcr));
255 if (((pcr >> 8) & 0xff) <= 5) {
256 pr_warn("Enabling workaround for errata I14\n");
257 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
258 : : "d" (pcr | 0x20));
259 }
260 }
261
262 init_mm.start_code = PAGE_OFFSET;
263 init_mm.end_code = (unsigned long)_etext;
264 init_mm.end_data = (unsigned long)_edata;
265 init_mm.brk = (unsigned long)_end;
266
267#if defined(CONFIG_BOOTPARAM)
268 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
269 m68k_command_line[CL_SIZE - 1] = 0;
270#endif /* CONFIG_BOOTPARAM */
271 process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
272 *cmdline_p = m68k_command_line;
273 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
274
275 parse_early_param();
276
277 switch (m68k_machtype) {
278#ifdef CONFIG_AMIGA
279 case MACH_AMIGA:
280 config_amiga();
281 break;
282#endif
283#ifdef CONFIG_ATARI
284 case MACH_ATARI:
285 config_atari();
286 break;
287#endif
288#ifdef CONFIG_MAC
289 case MACH_MAC:
290 config_mac();
291 break;
292#endif
293#ifdef CONFIG_SUN3
294 case MACH_SUN3:
295 config_sun3();
296 break;
297#endif
298#ifdef CONFIG_APOLLO
299 case MACH_APOLLO:
300 config_apollo();
301 break;
302#endif
303#ifdef CONFIG_MVME147
304 case MACH_MVME147:
305 config_mvme147();
306 break;
307#endif
308#ifdef CONFIG_MVME16x
309 case MACH_MVME16x:
310 config_mvme16x();
311 break;
312#endif
313#ifdef CONFIG_BVME6000
314 case MACH_BVME6000:
315 config_bvme6000();
316 break;
317#endif
318#ifdef CONFIG_HP300
319 case MACH_HP300:
320 config_hp300();
321 break;
322#endif
323#ifdef CONFIG_Q40
324 case MACH_Q40:
325 config_q40();
326 break;
327#endif
328#ifdef CONFIG_SUN3X
329 case MACH_SUN3X:
330 config_sun3x();
331 break;
332#endif
333#ifdef CONFIG_COLDFIRE
334 case MACH_M54XX:
335 case MACH_M5441X:
336 cf_bootmem_alloc();
337 cf_mmu_context_init();
338 config_BSP(NULL, 0);
339 break;
340#endif
341 default:
342 panic("No configuration setup");
343 }
344
345 paging_init();
346
347#ifdef CONFIG_NATFEAT
348 nf_init();
349#endif
350
351#ifndef CONFIG_SUN3
352#ifdef CONFIG_BLK_DEV_INITRD
353 if (m68k_ramdisk.size) {
354 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
355 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
356 initrd_end = initrd_start + m68k_ramdisk.size;
357 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
358 }
359#endif
360
361#ifdef CONFIG_ATARI
362 if (MACH_IS_ATARI)
363 atari_stram_reserve_pages((void *)availmem);
364#endif
365#ifdef CONFIG_SUN3X
366 if (MACH_IS_SUN3X) {
367 dvma_init();
368 }
369#endif
370
371#endif /* !CONFIG_SUN3 */
372
373/* set ISA defs early as possible */
374#if defined(CONFIG_ISA) && defined(MULTI_ISA)
375 if (MACH_IS_Q40) {
376 isa_type = ISA_TYPE_Q40;
377 isa_sex = 0;
378 }
379#ifdef CONFIG_AMIGA_PCMCIA
380 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
381 isa_type = ISA_TYPE_AG;
382 isa_sex = 1;
383 }
384#endif
385#ifdef CONFIG_ATARI_ROM_ISA
386 if (MACH_IS_ATARI) {
387 isa_type = ISA_TYPE_ENEC;
388 isa_sex = 0;
389 }
390#endif
391#endif
392}
393
394static int show_cpuinfo(struct seq_file *m, void *v)
395{
396 const char *cpu, *mmu, *fpu;
397 unsigned long clockfreq, clockfactor;
398
399#define LOOP_CYCLES_68020 (8)
400#define LOOP_CYCLES_68030 (8)
401#define LOOP_CYCLES_68040 (3)
402#define LOOP_CYCLES_68060 (1)
403#define LOOP_CYCLES_COLDFIRE (2)
404
405 if (CPU_IS_020) {
406 cpu = "68020";
407 clockfactor = LOOP_CYCLES_68020;
408 } else if (CPU_IS_030) {
409 cpu = "68030";
410 clockfactor = LOOP_CYCLES_68030;
411 } else if (CPU_IS_040) {
412 cpu = "68040";
413 clockfactor = LOOP_CYCLES_68040;
414 } else if (CPU_IS_060) {
415 cpu = "68060";
416 clockfactor = LOOP_CYCLES_68060;
417 } else if (CPU_IS_COLDFIRE) {
418 cpu = "ColdFire";
419 clockfactor = LOOP_CYCLES_COLDFIRE;
420 } else {
421 cpu = "680x0";
422 clockfactor = 0;
423 }
424
425#ifdef CONFIG_M68KFPU_EMU_ONLY
426 fpu = "none(soft float)";
427#else
428 if (m68k_fputype & FPU_68881)
429 fpu = "68881";
430 else if (m68k_fputype & FPU_68882)
431 fpu = "68882";
432 else if (m68k_fputype & FPU_68040)
433 fpu = "68040";
434 else if (m68k_fputype & FPU_68060)
435 fpu = "68060";
436 else if (m68k_fputype & FPU_SUNFPA)
437 fpu = "Sun FPA";
438 else if (m68k_fputype & FPU_COLDFIRE)
439 fpu = "ColdFire";
440 else
441 fpu = "none";
442#endif
443
444 if (m68k_mmutype & MMU_68851)
445 mmu = "68851";
446 else if (m68k_mmutype & MMU_68030)
447 mmu = "68030";
448 else if (m68k_mmutype & MMU_68040)
449 mmu = "68040";
450 else if (m68k_mmutype & MMU_68060)
451 mmu = "68060";
452 else if (m68k_mmutype & MMU_SUN3)
453 mmu = "Sun-3";
454 else if (m68k_mmutype & MMU_APOLLO)
455 mmu = "Apollo";
456 else if (m68k_mmutype & MMU_COLDFIRE)
457 mmu = "ColdFire";
458 else
459 mmu = "unknown";
460
461 clockfreq = loops_per_jiffy * HZ * clockfactor;
462
463 seq_printf(m, "CPU:\t\t%s\n"
464 "MMU:\t\t%s\n"
465 "FPU:\t\t%s\n"
466 "Clocking:\t%lu.%1luMHz\n"
467 "BogoMips:\t%lu.%02lu\n"
468 "Calibration:\t%lu loops\n",
469 cpu, mmu, fpu,
470 clockfreq/1000000,(clockfreq/100000)%10,
471 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
472 loops_per_jiffy);
473 return 0;
474}
475
476static void *c_start(struct seq_file *m, loff_t *pos)
477{
478 return *pos < 1 ? (void *)1 : NULL;
479}
480static void *c_next(struct seq_file *m, void *v, loff_t *pos)
481{
482 ++*pos;
483 return NULL;
484}
485static void c_stop(struct seq_file *m, void *v)
486{
487}
488const struct seq_operations cpuinfo_op = {
489 .start = c_start,
490 .next = c_next,
491 .stop = c_stop,
492 .show = show_cpuinfo,
493};
494
495#ifdef CONFIG_PROC_HARDWARE
496static int hardware_proc_show(struct seq_file *m, void *v)
497{
498 char model[80];
499 unsigned long mem;
500 int i;
501
502 if (mach_get_model)
503 mach_get_model(model);
504 else
505 strcpy(model, "Unknown m68k");
506
507 seq_printf(m, "Model:\t\t%s\n", model);
508 for (mem = 0, i = 0; i < m68k_num_memory; i++)
509 mem += m68k_memory[i].size;
510 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
511
512 if (mach_get_hardware_list)
513 mach_get_hardware_list(m);
514
515 return 0;
516}
517
518static int __init proc_hardware_init(void)
519{
520 proc_create_single("hardware", 0, NULL, hardware_proc_show);
521 return 0;
522}
523module_init(proc_hardware_init);
524#endif
525
526void check_bugs(void)
527{
528#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
529 if (m68k_fputype == 0) {
530 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
531 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
532 pr_emerg("Upgrade your hardware or join the FPU "
533 "emulation project\n");
534 panic("no FPU");
535 }
536#endif /* !CONFIG_M68KFPU_EMU */
537}
538
539#ifdef CONFIG_ADB
540static int __init adb_probe_sync_enable (char *str) {
541 extern int __adb_probe_sync;
542 __adb_probe_sync = 1;
543 return 1;
544}
545
546__setup("adb_sync", adb_probe_sync_enable);
547#endif /* CONFIG_ADB */
548
549#if IS_ENABLED(CONFIG_NVRAM)
550#ifdef CONFIG_MAC
551static unsigned char m68k_nvram_read_byte(int addr)
552{
553 if (MACH_IS_MAC)
554 return mac_pram_read_byte(addr);
555 return 0xff;
556}
557
558static void m68k_nvram_write_byte(unsigned char val, int addr)
559{
560 if (MACH_IS_MAC)
561 mac_pram_write_byte(val, addr);
562}
563#endif /* CONFIG_MAC */
564
565#ifdef CONFIG_ATARI
566static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos)
567{
568 if (MACH_IS_ATARI)
569 return atari_nvram_read(buf, count, ppos);
570 else if (MACH_IS_MAC)
571 return nvram_read_bytes(buf, count, ppos);
572 return -EINVAL;
573}
574
575static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos)
576{
577 if (MACH_IS_ATARI)
578 return atari_nvram_write(buf, count, ppos);
579 else if (MACH_IS_MAC)
580 return nvram_write_bytes(buf, count, ppos);
581 return -EINVAL;
582}
583
584static long m68k_nvram_set_checksum(void)
585{
586 if (MACH_IS_ATARI)
587 return atari_nvram_set_checksum();
588 return -EINVAL;
589}
590
591static long m68k_nvram_initialize(void)
592{
593 if (MACH_IS_ATARI)
594 return atari_nvram_initialize();
595 return -EINVAL;
596}
597#endif /* CONFIG_ATARI */
598
599static ssize_t m68k_nvram_get_size(void)
600{
601 if (MACH_IS_ATARI)
602 return atari_nvram_get_size();
603 else if (MACH_IS_MAC)
604 return mac_pram_get_size();
605 return -ENODEV;
606}
607
608/* Atari device drivers call .read (to get checksum validation) whereas
609 * Mac and PowerMac device drivers just use .read_byte.
610 */
611const struct nvram_ops arch_nvram_ops = {
612#ifdef CONFIG_MAC
613 .read_byte = m68k_nvram_read_byte,
614 .write_byte = m68k_nvram_write_byte,
615#endif
616#ifdef CONFIG_ATARI
617 .read = m68k_nvram_read,
618 .write = m68k_nvram_write,
619 .set_checksum = m68k_nvram_set_checksum,
620 .initialize = m68k_nvram_initialize,
621#endif
622 .get_size = m68k_nvram_get_size,
623};
624EXPORT_SYMBOL(arch_nvram_ops);
625#endif /* CONFIG_NVRAM */
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/arch/m68k/kernel/setup.c
4 *
5 * Copyright (C) 1995 Hamish Macdonald
6 */
7
8/*
9 * This file handles the architecture-dependent parts of system setup
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/* machine dependent irq functions */
87void (*mach_init_IRQ) (void) __initdata = NULL;
88void (*mach_get_model) (char *model);
89void (*mach_get_hardware_list) (struct seq_file *m);
90/* machine dependent timer functions */
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 /* Already set up by head.S */
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 /* The bootinfo is located right after the kernel */
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 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
237 * be confused by software FPU emulation. BEWARE.
238 * We should really do our own FPU check at startup.
239 * [what do we do with buggy 68LC040s? if we have problems
240 * with them, we should add a test to check_bugs() below] */
241#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
242 /* clear the fpu if we have one */
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 /* CONFIG_BOOTPARAM */
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 paging_init();
342
343#ifdef CONFIG_NATFEAT
344 nf_init();
345#endif
346
347#ifndef CONFIG_SUN3
348#ifdef CONFIG_BLK_DEV_INITRD
349 if (m68k_ramdisk.size) {
350 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
351 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
352 initrd_end = initrd_start + m68k_ramdisk.size;
353 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
354 }
355#endif
356
357#ifdef CONFIG_ATARI
358 if (MACH_IS_ATARI)
359 atari_stram_reserve_pages((void *)availmem);
360#endif
361#ifdef CONFIG_SUN3X
362 if (MACH_IS_SUN3X) {
363 dvma_init();
364 }
365#endif
366
367#endif /* !CONFIG_SUN3 */
368
369/* set ISA defs early as possible */
370#if defined(CONFIG_ISA) && defined(MULTI_ISA)
371 if (MACH_IS_Q40) {
372 isa_type = ISA_TYPE_Q40;
373 isa_sex = 0;
374 }
375#ifdef CONFIG_AMIGA_PCMCIA
376 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
377 isa_type = ISA_TYPE_AG;
378 isa_sex = 1;
379 }
380#endif
381#ifdef CONFIG_ATARI_ROM_ISA
382 if (MACH_IS_ATARI) {
383 isa_type = ISA_TYPE_ENEC;
384 isa_sex = 0;
385 }
386#endif
387#endif
388}
389
390static int show_cpuinfo(struct seq_file *m, void *v)
391{
392 const char *cpu, *mmu, *fpu;
393 unsigned long clockfreq, clockfactor;
394
395#define LOOP_CYCLES_68020 (8)
396#define LOOP_CYCLES_68030 (8)
397#define LOOP_CYCLES_68040 (3)
398#define LOOP_CYCLES_68060 (1)
399#define LOOP_CYCLES_COLDFIRE (2)
400
401 if (CPU_IS_020) {
402 cpu = "68020";
403 clockfactor = LOOP_CYCLES_68020;
404 } else if (CPU_IS_030) {
405 cpu = "68030";
406 clockfactor = LOOP_CYCLES_68030;
407 } else if (CPU_IS_040) {
408 cpu = "68040";
409 clockfactor = LOOP_CYCLES_68040;
410 } else if (CPU_IS_060) {
411 cpu = "68060";
412 clockfactor = LOOP_CYCLES_68060;
413 } else if (CPU_IS_COLDFIRE) {
414 cpu = "ColdFire";
415 clockfactor = LOOP_CYCLES_COLDFIRE;
416 } else {
417 cpu = "680x0";
418 clockfactor = 0;
419 }
420
421#ifdef CONFIG_M68KFPU_EMU_ONLY
422 fpu = "none(soft float)";
423#else
424 if (m68k_fputype & FPU_68881)
425 fpu = "68881";
426 else if (m68k_fputype & FPU_68882)
427 fpu = "68882";
428 else if (m68k_fputype & FPU_68040)
429 fpu = "68040";
430 else if (m68k_fputype & FPU_68060)
431 fpu = "68060";
432 else if (m68k_fputype & FPU_SUNFPA)
433 fpu = "Sun FPA";
434 else if (m68k_fputype & FPU_COLDFIRE)
435 fpu = "ColdFire";
436 else
437 fpu = "none";
438#endif
439
440 if (m68k_mmutype & MMU_68851)
441 mmu = "68851";
442 else if (m68k_mmutype & MMU_68030)
443 mmu = "68030";
444 else if (m68k_mmutype & MMU_68040)
445 mmu = "68040";
446 else if (m68k_mmutype & MMU_68060)
447 mmu = "68060";
448 else if (m68k_mmutype & MMU_SUN3)
449 mmu = "Sun-3";
450 else if (m68k_mmutype & MMU_APOLLO)
451 mmu = "Apollo";
452 else if (m68k_mmutype & MMU_COLDFIRE)
453 mmu = "ColdFire";
454 else
455 mmu = "unknown";
456
457 clockfreq = loops_per_jiffy * HZ * clockfactor;
458
459 seq_printf(m, "CPU:\t\t%s\n"
460 "MMU:\t\t%s\n"
461 "FPU:\t\t%s\n"
462 "Clocking:\t%lu.%1luMHz\n"
463 "BogoMips:\t%lu.%02lu\n"
464 "Calibration:\t%lu loops\n",
465 cpu, mmu, fpu,
466 clockfreq/1000000,(clockfreq/100000)%10,
467 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
468 loops_per_jiffy);
469 return 0;
470}
471
472static void *c_start(struct seq_file *m, loff_t *pos)
473{
474 return *pos < 1 ? (void *)1 : NULL;
475}
476static void *c_next(struct seq_file *m, void *v, loff_t *pos)
477{
478 ++*pos;
479 return NULL;
480}
481static void c_stop(struct seq_file *m, void *v)
482{
483}
484const struct seq_operations cpuinfo_op = {
485 .start = c_start,
486 .next = c_next,
487 .stop = c_stop,
488 .show = show_cpuinfo,
489};
490
491#ifdef CONFIG_PROC_HARDWARE
492static int hardware_proc_show(struct seq_file *m, void *v)
493{
494 char model[80];
495 unsigned long mem;
496 int i;
497
498 if (mach_get_model)
499 mach_get_model(model);
500 else
501 strcpy(model, "Unknown m68k");
502
503 seq_printf(m, "Model:\t\t%s\n", model);
504 for (mem = 0, i = 0; i < m68k_num_memory; i++)
505 mem += m68k_memory[i].size;
506 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
507
508 if (mach_get_hardware_list)
509 mach_get_hardware_list(m);
510
511 return 0;
512}
513
514static int __init proc_hardware_init(void)
515{
516 proc_create_single("hardware", 0, NULL, hardware_proc_show);
517 return 0;
518}
519module_init(proc_hardware_init);
520#endif
521
522void check_bugs(void)
523{
524#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
525 if (m68k_fputype == 0) {
526 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
527 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
528 pr_emerg("Upgrade your hardware or join the FPU "
529 "emulation project\n");
530 panic("no FPU");
531 }
532#endif /* !CONFIG_M68KFPU_EMU */
533}
534
535#ifdef CONFIG_ADB
536static int __init adb_probe_sync_enable (char *str) {
537 extern int __adb_probe_sync;
538 __adb_probe_sync = 1;
539 return 1;
540}
541
542__setup("adb_sync", adb_probe_sync_enable);
543#endif /* CONFIG_ADB */
544
545#if IS_ENABLED(CONFIG_NVRAM)
546#ifdef CONFIG_MAC
547static unsigned char m68k_nvram_read_byte(int addr)
548{
549 if (MACH_IS_MAC)
550 return mac_pram_read_byte(addr);
551 return 0xff;
552}
553
554static void m68k_nvram_write_byte(unsigned char val, int addr)
555{
556 if (MACH_IS_MAC)
557 mac_pram_write_byte(val, addr);
558}
559#endif /* CONFIG_MAC */
560
561#ifdef CONFIG_ATARI
562static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos)
563{
564 if (MACH_IS_ATARI)
565 return atari_nvram_read(buf, count, ppos);
566 else if (MACH_IS_MAC)
567 return nvram_read_bytes(buf, count, ppos);
568 return -EINVAL;
569}
570
571static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos)
572{
573 if (MACH_IS_ATARI)
574 return atari_nvram_write(buf, count, ppos);
575 else if (MACH_IS_MAC)
576 return nvram_write_bytes(buf, count, ppos);
577 return -EINVAL;
578}
579
580static long m68k_nvram_set_checksum(void)
581{
582 if (MACH_IS_ATARI)
583 return atari_nvram_set_checksum();
584 return -EINVAL;
585}
586
587static long m68k_nvram_initialize(void)
588{
589 if (MACH_IS_ATARI)
590 return atari_nvram_initialize();
591 return -EINVAL;
592}
593#endif /* CONFIG_ATARI */
594
595static ssize_t m68k_nvram_get_size(void)
596{
597 if (MACH_IS_ATARI)
598 return atari_nvram_get_size();
599 else if (MACH_IS_MAC)
600 return mac_pram_get_size();
601 return -ENODEV;
602}
603
604/* Atari device drivers call .read (to get checksum validation) whereas
605 * Mac and PowerMac device drivers just use .read_byte.
606 */
607const struct nvram_ops arch_nvram_ops = {
608#ifdef CONFIG_MAC
609 .read_byte = m68k_nvram_read_byte,
610 .write_byte = m68k_nvram_write_byte,
611#endif
612#ifdef CONFIG_ATARI
613 .read = m68k_nvram_read,
614 .write = m68k_nvram_write,
615 .set_checksum = m68k_nvram_set_checksum,
616 .initialize = m68k_nvram_initialize,
617#endif
618 .get_size = m68k_nvram_get_size,
619};
620EXPORT_SYMBOL(arch_nvram_ops);
621#endif /* CONFIG_NVRAM */