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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/cpu.h>
14#include <linux/mm.h>
15#include <linux/sched.h>
16#include <linux/delay.h>
17#include <linux/interrupt.h>
18#include <linux/fs.h>
19#include <linux/console.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#include <linux/random.h>
30
31#include <asm/bootinfo.h>
32#include <asm/byteorder.h>
33#include <asm/sections.h>
34#include <asm/setup.h>
35#include <asm/fpu.h>
36#include <asm/irq.h>
37#include <asm/io.h>
38#include <asm/machdep.h>
39#ifdef CONFIG_AMIGA
40#include <asm/amigahw.h>
41#endif
42#include <asm/atarihw.h>
43#ifdef CONFIG_ATARI
44#include <asm/atari_stram.h>
45#endif
46#ifdef CONFIG_SUN3X
47#include <asm/dvma.h>
48#endif
49#include <asm/macintosh.h>
50#include <asm/natfeat.h>
51#include <asm/config.h>
52
53#if !FPSTATESIZE || !NR_IRQS
54#warning No CPU/platform type selected, your kernel will not work!
55#warning Are you building an allnoconfig kernel?
56#endif
57
58unsigned long m68k_machtype;
59EXPORT_SYMBOL(m68k_machtype);
60unsigned long m68k_cputype;
61EXPORT_SYMBOL(m68k_cputype);
62unsigned long m68k_fputype;
63unsigned long m68k_mmutype;
64EXPORT_SYMBOL(m68k_mmutype);
65#ifdef CONFIG_VME
66unsigned long vme_brdtype;
67EXPORT_SYMBOL(vme_brdtype);
68#endif
69
70int m68k_is040or060;
71EXPORT_SYMBOL(m68k_is040or060);
72
73extern unsigned long availmem;
74
75int m68k_num_memory;
76EXPORT_SYMBOL(m68k_num_memory);
77int m68k_realnum_memory;
78EXPORT_SYMBOL(m68k_realnum_memory);
79unsigned long m68k_memoffset;
80struct m68k_mem_info m68k_memory[NUM_MEMINFO];
81EXPORT_SYMBOL(m68k_memory);
82
83static struct m68k_mem_info m68k_ramdisk __initdata;
84
85static char m68k_command_line[CL_SIZE] __initdata;
86
87void (*mach_sched_init) (void) __initdata = NULL;
88/* machine dependent irq functions */
89void (*mach_init_IRQ) (void) __initdata = NULL;
90void (*mach_get_model) (char *model);
91void (*mach_get_hardware_list) (struct seq_file *m);
92void (*mach_reset)( void );
93void (*mach_halt)( void );
94#ifdef CONFIG_HEARTBEAT
95void (*mach_heartbeat) (int);
96EXPORT_SYMBOL(mach_heartbeat);
97#endif
98#ifdef CONFIG_M68K_L2_CACHE
99void (*mach_l2_flush) (int);
100#endif
101#if defined(CONFIG_ISA) && defined(MULTI_ISA)
102int isa_type;
103int isa_sex;
104EXPORT_SYMBOL(isa_type);
105EXPORT_SYMBOL(isa_sex);
106#endif
107
108#define MASK_256K 0xfffc0000
109
110static void __init m68k_parse_bootinfo(const struct bi_record *record)
111{
112 const struct bi_record *first_record = record;
113 uint16_t tag;
114
115 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
116 int unknown = 0;
117 const void *data = record->data;
118 uint16_t size = be16_to_cpu(record->size);
119
120 switch (tag) {
121 case BI_MACHTYPE:
122 case BI_CPUTYPE:
123 case BI_FPUTYPE:
124 case BI_MMUTYPE:
125 /* Already set up by head.S */
126 break;
127
128 case BI_MEMCHUNK:
129 if (m68k_num_memory < NUM_MEMINFO) {
130 const struct mem_info *m = data;
131 m68k_memory[m68k_num_memory].addr =
132 be32_to_cpu(m->addr);
133 m68k_memory[m68k_num_memory].size =
134 be32_to_cpu(m->size);
135 m68k_num_memory++;
136 } else
137 pr_warn("%s: too many memory chunks\n",
138 __func__);
139 break;
140
141 case BI_RAMDISK:
142 {
143 const struct mem_info *m = data;
144 m68k_ramdisk.addr = be32_to_cpu(m->addr);
145 m68k_ramdisk.size = be32_to_cpu(m->size);
146 }
147 break;
148
149 case BI_COMMAND_LINE:
150 strscpy(m68k_command_line, data,
151 sizeof(m68k_command_line));
152 break;
153
154 case BI_RNG_SEED: {
155 u16 len = be16_to_cpup(data);
156 add_bootloader_randomness(data + 2, len);
157 /*
158 * Zero the data to preserve forward secrecy, and zero the
159 * length to prevent kexec from using it.
160 */
161 memzero_explicit((void *)data, len + 2);
162 break;
163 }
164
165 default:
166 if (MACH_IS_AMIGA)
167 unknown = amiga_parse_bootinfo(record);
168 else if (MACH_IS_ATARI)
169 unknown = atari_parse_bootinfo(record);
170 else if (MACH_IS_MAC)
171 unknown = mac_parse_bootinfo(record);
172 else if (MACH_IS_Q40)
173 unknown = q40_parse_bootinfo(record);
174 else if (MACH_IS_BVME6000)
175 unknown = bvme6000_parse_bootinfo(record);
176 else if (MACH_IS_MVME16x)
177 unknown = mvme16x_parse_bootinfo(record);
178 else if (MACH_IS_MVME147)
179 unknown = mvme147_parse_bootinfo(record);
180 else if (MACH_IS_HP300)
181 unknown = hp300_parse_bootinfo(record);
182 else if (MACH_IS_APOLLO)
183 unknown = apollo_parse_bootinfo(record);
184 else if (MACH_IS_VIRT)
185 unknown = virt_parse_bootinfo(record);
186 else
187 unknown = 1;
188 }
189 if (unknown)
190 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
191 tag);
192 record = (struct bi_record *)((unsigned long)record + size);
193 }
194
195 save_bootinfo(first_record);
196
197 m68k_realnum_memory = m68k_num_memory;
198#ifdef CONFIG_SINGLE_MEMORY_CHUNK
199 if (m68k_num_memory > 1) {
200 pr_warn("%s: ignoring last %i chunks of physical memory\n",
201 __func__, (m68k_num_memory - 1));
202 m68k_num_memory = 1;
203 }
204#endif
205}
206
207void __init setup_arch(char **cmdline_p)
208{
209 /* The bootinfo is located right after the kernel */
210 if (!CPU_IS_COLDFIRE)
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#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
224 /* clear the fpu if we have one */
225 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
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 pr_warn("Enabling workaround for errata I14\n");
238 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
239 : : "d" (pcr | 0x20));
240 }
241 }
242
243 setup_initial_init_mm((void *)PAGE_OFFSET, _etext, _edata, _end);
244
245#if defined(CONFIG_BOOTPARAM)
246 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
247 m68k_command_line[CL_SIZE - 1] = 0;
248#endif /* CONFIG_BOOTPARAM */
249 process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
250 *cmdline_p = m68k_command_line;
251 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
252
253 parse_early_param();
254
255 switch (m68k_machtype) {
256#ifdef CONFIG_AMIGA
257 case MACH_AMIGA:
258 config_amiga();
259 break;
260#endif
261#ifdef CONFIG_ATARI
262 case MACH_ATARI:
263 config_atari();
264 break;
265#endif
266#ifdef CONFIG_MAC
267 case MACH_MAC:
268 config_mac();
269 break;
270#endif
271#ifdef CONFIG_SUN3
272 case MACH_SUN3:
273 config_sun3();
274 break;
275#endif
276#ifdef CONFIG_APOLLO
277 case MACH_APOLLO:
278 config_apollo();
279 break;
280#endif
281#ifdef CONFIG_MVME147
282 case MACH_MVME147:
283 config_mvme147();
284 break;
285#endif
286#ifdef CONFIG_MVME16x
287 case MACH_MVME16x:
288 config_mvme16x();
289 break;
290#endif
291#ifdef CONFIG_BVME6000
292 case MACH_BVME6000:
293 config_bvme6000();
294 break;
295#endif
296#ifdef CONFIG_HP300
297 case MACH_HP300:
298 config_hp300();
299 break;
300#endif
301#ifdef CONFIG_Q40
302 case MACH_Q40:
303 config_q40();
304 break;
305#endif
306#ifdef CONFIG_SUN3X
307 case MACH_SUN3X:
308 config_sun3x();
309 break;
310#endif
311#ifdef CONFIG_COLDFIRE
312 case MACH_M54XX:
313 case MACH_M5441X:
314 cf_bootmem_alloc();
315 cf_mmu_context_init();
316 config_BSP(NULL, 0);
317 break;
318#endif
319#ifdef CONFIG_VIRT
320 case MACH_VIRT:
321 config_virt();
322 break;
323#endif
324 default:
325 panic("No configuration setup");
326 }
327
328 if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && m68k_ramdisk.size)
329 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
330
331 paging_init();
332
333 if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && m68k_ramdisk.size) {
334 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
335 initrd_end = initrd_start + m68k_ramdisk.size;
336 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
337 }
338
339#ifdef CONFIG_NATFEAT
340 nf_init();
341#endif
342
343#ifdef CONFIG_ATARI
344 if (MACH_IS_ATARI)
345 atari_stram_reserve_pages((void *)availmem);
346#endif
347#ifdef CONFIG_SUN3X
348 if (MACH_IS_SUN3X) {
349 dvma_init();
350 }
351#endif
352
353/* set ISA defs early as possible */
354#if defined(CONFIG_ISA) && defined(MULTI_ISA)
355 if (MACH_IS_Q40) {
356 isa_type = ISA_TYPE_Q40;
357 isa_sex = 0;
358 }
359#ifdef CONFIG_AMIGA_PCMCIA
360 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
361 isa_type = ISA_TYPE_AG;
362 isa_sex = 1;
363 }
364#endif
365#ifdef CONFIG_ATARI_ROM_ISA
366 if (MACH_IS_ATARI) {
367 isa_type = ISA_TYPE_ENEC;
368 isa_sex = 0;
369 }
370#endif
371#endif
372}
373
374static int show_cpuinfo(struct seq_file *m, void *v)
375{
376 const char *cpu, *mmu, *fpu;
377 unsigned long clockfreq, clockfactor;
378
379#define LOOP_CYCLES_68020 (8)
380#define LOOP_CYCLES_68030 (8)
381#define LOOP_CYCLES_68040 (3)
382#define LOOP_CYCLES_68060 (1)
383#define LOOP_CYCLES_COLDFIRE (2)
384
385 if (CPU_IS_020) {
386 cpu = "68020";
387 clockfactor = LOOP_CYCLES_68020;
388 } else if (CPU_IS_030) {
389 cpu = "68030";
390 clockfactor = LOOP_CYCLES_68030;
391 } else if (CPU_IS_040) {
392 cpu = "68040";
393 clockfactor = LOOP_CYCLES_68040;
394 } else if (CPU_IS_060) {
395 cpu = "68060";
396 clockfactor = LOOP_CYCLES_68060;
397 } else if (CPU_IS_COLDFIRE) {
398 cpu = "ColdFire";
399 clockfactor = LOOP_CYCLES_COLDFIRE;
400 } else {
401 cpu = "680x0";
402 clockfactor = 0;
403 }
404
405#ifdef CONFIG_M68KFPU_EMU_ONLY
406 fpu = "none(soft float)";
407#else
408 if (m68k_fputype & FPU_68881)
409 fpu = "68881";
410 else if (m68k_fputype & FPU_68882)
411 fpu = "68882";
412 else if (m68k_fputype & FPU_68040)
413 fpu = "68040";
414 else if (m68k_fputype & FPU_68060)
415 fpu = "68060";
416 else if (m68k_fputype & FPU_SUNFPA)
417 fpu = "Sun FPA";
418 else if (m68k_fputype & FPU_COLDFIRE)
419 fpu = "ColdFire";
420 else
421 fpu = "none";
422#endif
423
424 if (m68k_mmutype & MMU_68851)
425 mmu = "68851";
426 else if (m68k_mmutype & MMU_68030)
427 mmu = "68030";
428 else if (m68k_mmutype & MMU_68040)
429 mmu = "68040";
430 else if (m68k_mmutype & MMU_68060)
431 mmu = "68060";
432 else if (m68k_mmutype & MMU_SUN3)
433 mmu = "Sun-3";
434 else if (m68k_mmutype & MMU_APOLLO)
435 mmu = "Apollo";
436 else if (m68k_mmutype & MMU_COLDFIRE)
437 mmu = "ColdFire";
438 else
439 mmu = "unknown";
440
441 clockfreq = loops_per_jiffy * HZ * clockfactor;
442
443 seq_printf(m, "CPU:\t\t%s\n"
444 "MMU:\t\t%s\n"
445 "FPU:\t\t%s\n"
446 "Clocking:\t%lu.%1luMHz\n"
447 "BogoMips:\t%lu.%02lu\n"
448 "Calibration:\t%lu loops\n",
449 cpu, mmu, fpu,
450 clockfreq/1000000,(clockfreq/100000)%10,
451 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
452 loops_per_jiffy);
453 return 0;
454}
455
456static void *c_start(struct seq_file *m, loff_t *pos)
457{
458 return *pos < 1 ? (void *)1 : NULL;
459}
460static void *c_next(struct seq_file *m, void *v, loff_t *pos)
461{
462 ++*pos;
463 return NULL;
464}
465static void c_stop(struct seq_file *m, void *v)
466{
467}
468const struct seq_operations cpuinfo_op = {
469 .start = c_start,
470 .next = c_next,
471 .stop = c_stop,
472 .show = show_cpuinfo,
473};
474
475#ifdef CONFIG_PROC_HARDWARE
476static int hardware_proc_show(struct seq_file *m, void *v)
477{
478 char model[80];
479 unsigned long mem;
480 int i;
481
482 if (mach_get_model)
483 mach_get_model(model);
484 else
485 strcpy(model, "Unknown m68k");
486
487 seq_printf(m, "Model:\t\t%s\n", model);
488 for (mem = 0, i = 0; i < m68k_num_memory; i++)
489 mem += m68k_memory[i].size;
490 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
491
492 if (mach_get_hardware_list)
493 mach_get_hardware_list(m);
494
495 return 0;
496}
497
498static int __init proc_hardware_init(void)
499{
500 proc_create_single("hardware", 0, NULL, hardware_proc_show);
501 return 0;
502}
503module_init(proc_hardware_init);
504#endif
505
506void __init arch_cpu_finalize_init(void)
507{
508#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
509 if (m68k_fputype == 0) {
510 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
511 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
512 pr_emerg("Upgrade your hardware or join the FPU "
513 "emulation project\n");
514 panic("no FPU");
515 }
516#endif /* !CONFIG_M68KFPU_EMU */
517}
518
519#ifdef CONFIG_ADB
520static int __init adb_probe_sync_enable (char *str) {
521 extern int __adb_probe_sync;
522 __adb_probe_sync = 1;
523 return 1;
524}
525
526__setup("adb_sync", adb_probe_sync_enable);
527#endif /* CONFIG_ADB */
528
529#if IS_ENABLED(CONFIG_NVRAM)
530#ifdef CONFIG_MAC
531static unsigned char m68k_nvram_read_byte(int addr)
532{
533 if (MACH_IS_MAC)
534 return mac_pram_read_byte(addr);
535 return 0xff;
536}
537
538static void m68k_nvram_write_byte(unsigned char val, int addr)
539{
540 if (MACH_IS_MAC)
541 mac_pram_write_byte(val, addr);
542}
543#endif /* CONFIG_MAC */
544
545#ifdef CONFIG_ATARI
546static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos)
547{
548 if (MACH_IS_ATARI)
549 return atari_nvram_read(buf, count, ppos);
550 else if (MACH_IS_MAC)
551 return nvram_read_bytes(buf, count, ppos);
552 return -EINVAL;
553}
554
555static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos)
556{
557 if (MACH_IS_ATARI)
558 return atari_nvram_write(buf, count, ppos);
559 else if (MACH_IS_MAC)
560 return nvram_write_bytes(buf, count, ppos);
561 return -EINVAL;
562}
563
564static long m68k_nvram_set_checksum(void)
565{
566 if (MACH_IS_ATARI)
567 return atari_nvram_set_checksum();
568 return -EINVAL;
569}
570
571static long m68k_nvram_initialize(void)
572{
573 if (MACH_IS_ATARI)
574 return atari_nvram_initialize();
575 return -EINVAL;
576}
577#endif /* CONFIG_ATARI */
578
579static ssize_t m68k_nvram_get_size(void)
580{
581 if (MACH_IS_ATARI)
582 return atari_nvram_get_size();
583 else if (MACH_IS_MAC)
584 return mac_pram_get_size();
585 return -ENODEV;
586}
587
588/* Atari device drivers call .read (to get checksum validation) whereas
589 * Mac and PowerMac device drivers just use .read_byte.
590 */
591const struct nvram_ops arch_nvram_ops = {
592#ifdef CONFIG_MAC
593 .read_byte = m68k_nvram_read_byte,
594 .write_byte = m68k_nvram_write_byte,
595#endif
596#ifdef CONFIG_ATARI
597 .read = m68k_nvram_read,
598 .write = m68k_nvram_write,
599 .set_checksum = m68k_nvram_set_checksum,
600 .initialize = m68k_nvram_initialize,
601#endif
602 .get_size = m68k_nvram_get_size,
603};
604EXPORT_SYMBOL(arch_nvram_ops);
605#endif /* CONFIG_NVRAM */
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/byteorder.h>
30#include <asm/sections.h>
31#include <asm/setup.h>
32#include <asm/fpu.h>
33#include <asm/irq.h>
34#include <asm/io.h>
35#include <asm/machdep.h>
36#ifdef CONFIG_AMIGA
37#include <asm/amigahw.h>
38#endif
39#ifdef CONFIG_ATARI
40#include <asm/atarihw.h>
41#include <asm/atari_stram.h>
42#endif
43#ifdef CONFIG_SUN3X
44#include <asm/dvma.h>
45#endif
46#include <asm/natfeat.h>
47
48#if !FPSTATESIZE || !NR_IRQS
49#warning No CPU/platform type selected, your kernel will not work!
50#warning Are you building an allnoconfig kernel?
51#endif
52
53unsigned long m68k_machtype;
54EXPORT_SYMBOL(m68k_machtype);
55unsigned long m68k_cputype;
56EXPORT_SYMBOL(m68k_cputype);
57unsigned long m68k_fputype;
58unsigned long m68k_mmutype;
59EXPORT_SYMBOL(m68k_mmutype);
60#ifdef CONFIG_VME
61unsigned long vme_brdtype;
62EXPORT_SYMBOL(vme_brdtype);
63#endif
64
65int m68k_is040or060;
66EXPORT_SYMBOL(m68k_is040or060);
67
68extern unsigned long availmem;
69
70int m68k_num_memory;
71EXPORT_SYMBOL(m68k_num_memory);
72int m68k_realnum_memory;
73EXPORT_SYMBOL(m68k_realnum_memory);
74unsigned long m68k_memoffset;
75struct m68k_mem_info m68k_memory[NUM_MEMINFO];
76EXPORT_SYMBOL(m68k_memory);
77
78static struct m68k_mem_info m68k_ramdisk __initdata;
79
80static char m68k_command_line[CL_SIZE] __initdata;
81
82void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
83/* machine dependent irq functions */
84void (*mach_init_IRQ) (void) __initdata = NULL;
85void (*mach_get_model) (char *model);
86void (*mach_get_hardware_list) (struct seq_file *m);
87/* machine dependent timer functions */
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 IS_ENABLED(CONFIG_INPUT_M68K_BEEP)
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 uint16_t tag;
148
149 save_bootinfo(record);
150
151 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
152 int unknown = 0;
153 const void *data = record->data;
154 uint16_t size = be16_to_cpu(record->size);
155
156 switch (tag) {
157 case BI_MACHTYPE:
158 case BI_CPUTYPE:
159 case BI_FPUTYPE:
160 case BI_MMUTYPE:
161 /* Already set up by head.S */
162 break;
163
164 case BI_MEMCHUNK:
165 if (m68k_num_memory < NUM_MEMINFO) {
166 const struct mem_info *m = data;
167 m68k_memory[m68k_num_memory].addr =
168 be32_to_cpu(m->addr);
169 m68k_memory[m68k_num_memory].size =
170 be32_to_cpu(m->size);
171 m68k_num_memory++;
172 } else
173 pr_warn("%s: too many memory chunks\n",
174 __func__);
175 break;
176
177 case BI_RAMDISK:
178 {
179 const struct mem_info *m = data;
180 m68k_ramdisk.addr = be32_to_cpu(m->addr);
181 m68k_ramdisk.size = be32_to_cpu(m->size);
182 }
183 break;
184
185 case BI_COMMAND_LINE:
186 strlcpy(m68k_command_line, data,
187 sizeof(m68k_command_line));
188 break;
189
190 default:
191 if (MACH_IS_AMIGA)
192 unknown = amiga_parse_bootinfo(record);
193 else if (MACH_IS_ATARI)
194 unknown = atari_parse_bootinfo(record);
195 else if (MACH_IS_MAC)
196 unknown = mac_parse_bootinfo(record);
197 else if (MACH_IS_Q40)
198 unknown = q40_parse_bootinfo(record);
199 else if (MACH_IS_BVME6000)
200 unknown = bvme6000_parse_bootinfo(record);
201 else if (MACH_IS_MVME16x)
202 unknown = mvme16x_parse_bootinfo(record);
203 else if (MACH_IS_MVME147)
204 unknown = mvme147_parse_bootinfo(record);
205 else if (MACH_IS_HP300)
206 unknown = hp300_parse_bootinfo(record);
207 else if (MACH_IS_APOLLO)
208 unknown = apollo_parse_bootinfo(record);
209 else
210 unknown = 1;
211 }
212 if (unknown)
213 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
214 tag);
215 record = (struct bi_record *)((unsigned long)record + size);
216 }
217
218 m68k_realnum_memory = m68k_num_memory;
219#ifdef CONFIG_SINGLE_MEMORY_CHUNK
220 if (m68k_num_memory > 1) {
221 pr_warn("%s: ignoring last %i chunks of physical memory\n",
222 __func__, (m68k_num_memory - 1));
223 m68k_num_memory = 1;
224 }
225#endif
226}
227
228void __init setup_arch(char **cmdline_p)
229{
230#ifndef CONFIG_SUN3
231 int i;
232#endif
233
234 /* The bootinfo is located right after the kernel */
235 if (!CPU_IS_COLDFIRE)
236 m68k_parse_bootinfo((const struct bi_record *)_end);
237
238 if (CPU_IS_040)
239 m68k_is040or060 = 4;
240 else if (CPU_IS_060)
241 m68k_is040or060 = 6;
242
243 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
244 * be confused by software FPU emulation. BEWARE.
245 * We should really do our own FPU check at startup.
246 * [what do we do with buggy 68LC040s? if we have problems
247 * with them, we should add a test to check_bugs() below] */
248#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
249 /* clear the fpu if we have one */
250 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
251 volatile int zero = 0;
252 asm volatile ("frestore %0" : : "m" (zero));
253 }
254#endif
255
256 if (CPU_IS_060) {
257 u32 pcr;
258
259 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
260 : "=d" (pcr));
261 if (((pcr >> 8) & 0xff) <= 5) {
262 pr_warn("Enabling workaround for errata I14\n");
263 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
264 : : "d" (pcr | 0x20));
265 }
266 }
267
268 init_mm.start_code = PAGE_OFFSET;
269 init_mm.end_code = (unsigned long)_etext;
270 init_mm.end_data = (unsigned long)_edata;
271 init_mm.brk = (unsigned long)_end;
272
273#if defined(CONFIG_BOOTPARAM)
274 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
275 m68k_command_line[CL_SIZE - 1] = 0;
276#endif /* CONFIG_BOOTPARAM */
277 process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
278 *cmdline_p = m68k_command_line;
279 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
280
281 parse_early_param();
282
283#ifdef CONFIG_DUMMY_CONSOLE
284 conswitchp = &dummy_con;
285#endif
286
287 switch (m68k_machtype) {
288#ifdef CONFIG_AMIGA
289 case MACH_AMIGA:
290 config_amiga();
291 break;
292#endif
293#ifdef CONFIG_ATARI
294 case MACH_ATARI:
295 config_atari();
296 break;
297#endif
298#ifdef CONFIG_MAC
299 case MACH_MAC:
300 config_mac();
301 break;
302#endif
303#ifdef CONFIG_SUN3
304 case MACH_SUN3:
305 config_sun3();
306 break;
307#endif
308#ifdef CONFIG_APOLLO
309 case MACH_APOLLO:
310 config_apollo();
311 break;
312#endif
313#ifdef CONFIG_MVME147
314 case MACH_MVME147:
315 config_mvme147();
316 break;
317#endif
318#ifdef CONFIG_MVME16x
319 case MACH_MVME16x:
320 config_mvme16x();
321 break;
322#endif
323#ifdef CONFIG_BVME6000
324 case MACH_BVME6000:
325 config_bvme6000();
326 break;
327#endif
328#ifdef CONFIG_HP300
329 case MACH_HP300:
330 config_hp300();
331 break;
332#endif
333#ifdef CONFIG_Q40
334 case MACH_Q40:
335 config_q40();
336 break;
337#endif
338#ifdef CONFIG_SUN3X
339 case MACH_SUN3X:
340 config_sun3x();
341 break;
342#endif
343#ifdef CONFIG_COLDFIRE
344 case MACH_M54XX:
345 case MACH_M5441X:
346 config_BSP(NULL, 0);
347 break;
348#endif
349 default:
350 panic("No configuration setup");
351 }
352
353 paging_init();
354
355#ifdef CONFIG_NATFEAT
356 nf_init();
357#endif
358
359#ifndef CONFIG_SUN3
360 for (i = 1; i < m68k_num_memory; i++)
361 free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
362 m68k_memory[i].size);
363#ifdef CONFIG_BLK_DEV_INITRD
364 if (m68k_ramdisk.size) {
365 reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
366 m68k_ramdisk.addr, m68k_ramdisk.size,
367 BOOTMEM_DEFAULT);
368 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
369 initrd_end = initrd_start + m68k_ramdisk.size;
370 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
371 }
372#endif
373
374#ifdef CONFIG_ATARI
375 if (MACH_IS_ATARI)
376 atari_stram_reserve_pages((void *)availmem);
377#endif
378#ifdef CONFIG_SUN3X
379 if (MACH_IS_SUN3X) {
380 dvma_init();
381 }
382#endif
383
384#endif /* !CONFIG_SUN3 */
385
386/* set ISA defs early as possible */
387#if defined(CONFIG_ISA) && defined(MULTI_ISA)
388 if (MACH_IS_Q40) {
389 isa_type = ISA_TYPE_Q40;
390 isa_sex = 0;
391 }
392#ifdef CONFIG_AMIGA_PCMCIA
393 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
394 isa_type = ISA_TYPE_AG;
395 isa_sex = 1;
396 }
397#endif
398#ifdef CONFIG_ATARI_ROM_ISA
399 if (MACH_IS_ATARI) {
400 isa_type = ISA_TYPE_ENEC;
401 isa_sex = 0;
402 }
403#endif
404#endif
405}
406
407static int show_cpuinfo(struct seq_file *m, void *v)
408{
409 const char *cpu, *mmu, *fpu;
410 unsigned long clockfreq, clockfactor;
411
412#define LOOP_CYCLES_68020 (8)
413#define LOOP_CYCLES_68030 (8)
414#define LOOP_CYCLES_68040 (3)
415#define LOOP_CYCLES_68060 (1)
416#define LOOP_CYCLES_COLDFIRE (2)
417
418 if (CPU_IS_020) {
419 cpu = "68020";
420 clockfactor = LOOP_CYCLES_68020;
421 } else if (CPU_IS_030) {
422 cpu = "68030";
423 clockfactor = LOOP_CYCLES_68030;
424 } else if (CPU_IS_040) {
425 cpu = "68040";
426 clockfactor = LOOP_CYCLES_68040;
427 } else if (CPU_IS_060) {
428 cpu = "68060";
429 clockfactor = LOOP_CYCLES_68060;
430 } else if (CPU_IS_COLDFIRE) {
431 cpu = "ColdFire";
432 clockfactor = LOOP_CYCLES_COLDFIRE;
433 } else {
434 cpu = "680x0";
435 clockfactor = 0;
436 }
437
438#ifdef CONFIG_M68KFPU_EMU_ONLY
439 fpu = "none(soft float)";
440#else
441 if (m68k_fputype & FPU_68881)
442 fpu = "68881";
443 else if (m68k_fputype & FPU_68882)
444 fpu = "68882";
445 else if (m68k_fputype & FPU_68040)
446 fpu = "68040";
447 else if (m68k_fputype & FPU_68060)
448 fpu = "68060";
449 else if (m68k_fputype & FPU_SUNFPA)
450 fpu = "Sun FPA";
451 else if (m68k_fputype & FPU_COLDFIRE)
452 fpu = "ColdFire";
453 else
454 fpu = "none";
455#endif
456
457 if (m68k_mmutype & MMU_68851)
458 mmu = "68851";
459 else if (m68k_mmutype & MMU_68030)
460 mmu = "68030";
461 else if (m68k_mmutype & MMU_68040)
462 mmu = "68040";
463 else if (m68k_mmutype & MMU_68060)
464 mmu = "68060";
465 else if (m68k_mmutype & MMU_SUN3)
466 mmu = "Sun-3";
467 else if (m68k_mmutype & MMU_APOLLO)
468 mmu = "Apollo";
469 else if (m68k_mmutype & MMU_COLDFIRE)
470 mmu = "ColdFire";
471 else
472 mmu = "unknown";
473
474 clockfreq = loops_per_jiffy * HZ * clockfactor;
475
476 seq_printf(m, "CPU:\t\t%s\n"
477 "MMU:\t\t%s\n"
478 "FPU:\t\t%s\n"
479 "Clocking:\t%lu.%1luMHz\n"
480 "BogoMips:\t%lu.%02lu\n"
481 "Calibration:\t%lu loops\n",
482 cpu, mmu, fpu,
483 clockfreq/1000000,(clockfreq/100000)%10,
484 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
485 loops_per_jiffy);
486 return 0;
487}
488
489static void *c_start(struct seq_file *m, loff_t *pos)
490{
491 return *pos < 1 ? (void *)1 : NULL;
492}
493static void *c_next(struct seq_file *m, void *v, loff_t *pos)
494{
495 ++*pos;
496 return NULL;
497}
498static void c_stop(struct seq_file *m, void *v)
499{
500}
501const struct seq_operations cpuinfo_op = {
502 .start = c_start,
503 .next = c_next,
504 .stop = c_stop,
505 .show = show_cpuinfo,
506};
507
508#ifdef CONFIG_PROC_HARDWARE
509static int hardware_proc_show(struct seq_file *m, void *v)
510{
511 char model[80];
512 unsigned long mem;
513 int i;
514
515 if (mach_get_model)
516 mach_get_model(model);
517 else
518 strcpy(model, "Unknown m68k");
519
520 seq_printf(m, "Model:\t\t%s\n", model);
521 for (mem = 0, i = 0; i < m68k_num_memory; i++)
522 mem += m68k_memory[i].size;
523 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
524
525 if (mach_get_hardware_list)
526 mach_get_hardware_list(m);
527
528 return 0;
529}
530
531static int hardware_proc_open(struct inode *inode, struct file *file)
532{
533 return single_open(file, hardware_proc_show, NULL);
534}
535
536static const struct file_operations hardware_proc_fops = {
537 .open = hardware_proc_open,
538 .read = seq_read,
539 .llseek = seq_lseek,
540 .release = single_release,
541};
542
543static int __init proc_hardware_init(void)
544{
545 proc_create("hardware", 0, NULL, &hardware_proc_fops);
546 return 0;
547}
548module_init(proc_hardware_init);
549#endif
550
551void check_bugs(void)
552{
553#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
554 if (m68k_fputype == 0) {
555 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
556 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
557 pr_emerg("Upgrade your hardware or join the FPU "
558 "emulation project\n");
559 panic("no FPU");
560 }
561#endif /* !CONFIG_M68KFPU_EMU */
562}
563
564#ifdef CONFIG_ADB
565static int __init adb_probe_sync_enable (char *str) {
566 extern int __adb_probe_sync;
567 __adb_probe_sync = 1;
568 return 1;
569}
570
571__setup("adb_sync", adb_probe_sync_enable);
572#endif /* CONFIG_ADB */