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