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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 
53 unsigned long m68k_machtype;
54 EXPORT_SYMBOL(m68k_machtype);
55 unsigned long m68k_cputype;
56 EXPORT_SYMBOL(m68k_cputype);
57 unsigned long m68k_fputype;
58 unsigned long m68k_mmutype;
59 EXPORT_SYMBOL(m68k_mmutype);
60 #ifdef CONFIG_VME
61 unsigned long vme_brdtype;
62 EXPORT_SYMBOL(vme_brdtype);
63 #endif
64 
65 int m68k_is040or060;
66 EXPORT_SYMBOL(m68k_is040or060);
67 
68 extern unsigned long availmem;
69 
70 int m68k_num_memory;
71 EXPORT_SYMBOL(m68k_num_memory);
72 int m68k_realnum_memory;
73 EXPORT_SYMBOL(m68k_realnum_memory);
74 unsigned long m68k_memoffset;
75 struct m68k_mem_info m68k_memory[NUM_MEMINFO];
76 EXPORT_SYMBOL(m68k_memory);
77 
78 static struct m68k_mem_info m68k_ramdisk __initdata;
79 
80 static char m68k_command_line[CL_SIZE] __initdata;
81 
82 void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
83 /* machine dependent irq functions */
84 void (*mach_init_IRQ) (void) __initdata = NULL;
85 void (*mach_get_model) (char *model);
86 void (*mach_get_hardware_list) (struct seq_file *m);
87 /* machine dependent timer functions */
88 int (*mach_hwclk) (int, struct rtc_time*);
89 EXPORT_SYMBOL(mach_hwclk);
90 int (*mach_set_clock_mmss) (unsigned long);
91 unsigned int (*mach_get_ss)(void);
92 int (*mach_get_rtc_pll)(struct rtc_pll_info *);
93 int (*mach_set_rtc_pll)(struct rtc_pll_info *);
94 EXPORT_SYMBOL(mach_get_ss);
95 EXPORT_SYMBOL(mach_get_rtc_pll);
96 EXPORT_SYMBOL(mach_set_rtc_pll);
97 void (*mach_reset)( void );
98 void (*mach_halt)( void );
99 void (*mach_power_off)( void );
100 long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
101 #ifdef CONFIG_HEARTBEAT
102 void (*mach_heartbeat) (int);
103 EXPORT_SYMBOL(mach_heartbeat);
104 #endif
105 #ifdef CONFIG_M68K_L2_CACHE
106 void (*mach_l2_flush) (int);
107 #endif
108 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
109 void (*mach_beep)(unsigned int, unsigned int);
110 EXPORT_SYMBOL(mach_beep);
111 #endif
112 #if defined(CONFIG_ISA) && defined(MULTI_ISA)
113 int isa_type;
114 int isa_sex;
115 EXPORT_SYMBOL(isa_type);
116 EXPORT_SYMBOL(isa_sex);
117 #endif
118 
119 extern int amiga_parse_bootinfo(const struct bi_record *);
120 extern int atari_parse_bootinfo(const struct bi_record *);
121 extern int mac_parse_bootinfo(const struct bi_record *);
122 extern int q40_parse_bootinfo(const struct bi_record *);
123 extern int bvme6000_parse_bootinfo(const struct bi_record *);
124 extern int mvme16x_parse_bootinfo(const struct bi_record *);
125 extern int mvme147_parse_bootinfo(const struct bi_record *);
126 extern int hp300_parse_bootinfo(const struct bi_record *);
127 extern int apollo_parse_bootinfo(const struct bi_record *);
128 
129 extern void config_amiga(void);
130 extern void config_atari(void);
131 extern void config_mac(void);
132 extern void config_sun3(void);
133 extern void config_apollo(void);
134 extern void config_mvme147(void);
135 extern void config_mvme16x(void);
136 extern void config_bvme6000(void);
137 extern void config_hp300(void);
138 extern void config_q40(void);
139 extern void config_sun3x(void);
140 
141 #define MASK_256K 0xfffc0000
142 
143 extern void paging_init(void);
144 
m68k_parse_bootinfo(const struct bi_record * record)145 static 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 
setup_arch(char ** cmdline_p)228 void __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 
show_cpuinfo(struct seq_file * m,void * v)405 static 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 
c_start(struct seq_file * m,loff_t * pos)487 static void *c_start(struct seq_file *m, loff_t *pos)
488 {
489 	return *pos < 1 ? (void *)1 : NULL;
490 }
c_next(struct seq_file * m,void * v,loff_t * pos)491 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
492 {
493 	++*pos;
494 	return NULL;
495 }
c_stop(struct seq_file * m,void * v)496 static void c_stop(struct seq_file *m, void *v)
497 {
498 }
499 const 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
hardware_proc_show(struct seq_file * m,void * v)507 static 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 
hardware_proc_open(struct inode * inode,struct file * file)529 static int hardware_proc_open(struct inode *inode, struct file *file)
530 {
531 	return single_open(file, hardware_proc_show, NULL);
532 }
533 
534 static 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 
proc_hardware_init(void)541 static int __init proc_hardware_init(void)
542 {
543 	proc_create("hardware", 0, NULL, &hardware_proc_fops);
544 	return 0;
545 }
546 module_init(proc_hardware_init);
547 #endif
548 
check_bugs(void)549 void 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
adb_probe_sync_enable(char * str)563 static 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 */
571