setup_mm.c revision 0a2796da1182a7dcfba41f796f45986237bc1688 
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/sections.h>
30#include <asm/setup.h>
31#include <asm/fpu.h>
32#include <asm/irq.h>
33#include <asm/io.h>
34#include <asm/machdep.h>
35#ifdef CONFIG_AMIGA
36#include <asm/amigahw.h>
37#endif
38#ifdef CONFIG_ATARI
39#include <asm/atarihw.h>
40#include <asm/atari_stram.h>
41#endif
42#ifdef CONFIG_SUN3X
43#include <asm/dvma.h>
44#endif
45#include <asm/natfeat.h>
46
47#if !FPSTATESIZE || !NR_IRQS
48#warning No CPU/platform type selected, your kernel will not work!
49#warning Are you building an allnoconfig kernel?
50#endif
51
52unsigned long m68k_machtype;
53EXPORT_SYMBOL(m68k_machtype);
54unsigned long m68k_cputype;
55EXPORT_SYMBOL(m68k_cputype);
56unsigned long m68k_fputype;
57unsigned long m68k_mmutype;
58EXPORT_SYMBOL(m68k_mmutype);
59#ifdef CONFIG_VME
60unsigned long vme_brdtype;
61EXPORT_SYMBOL(vme_brdtype);
62#endif
63
64int m68k_is040or060;
65EXPORT_SYMBOL(m68k_is040or060);
66
67extern unsigned long availmem;
68
69int m68k_num_memory;
70EXPORT_SYMBOL(m68k_num_memory);
71int m68k_realnum_memory;
72EXPORT_SYMBOL(m68k_realnum_memory);
73unsigned long m68k_memoffset;
74struct mem_info m68k_memory[NUM_MEMINFO];
75EXPORT_SYMBOL(m68k_memory);
76
77struct mem_info m68k_ramdisk;
78
79static char m68k_command_line[CL_SIZE];
80
81void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
82/* machine dependent irq functions */
83void (*mach_init_IRQ) (void) __initdata = NULL;
84void (*mach_get_model) (char *model);
85void (*mach_get_hardware_list) (struct seq_file *m);
86/* machine dependent timer functions */
87unsigned long (*mach_gettimeoffset) (void);
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	while (record->tag != BI_LAST) {
148		int unknown = 0;
149		const unsigned long *data = record->data;
150
151		switch (record->tag) {
152		case BI_MACHTYPE:
153		case BI_CPUTYPE:
154		case BI_FPUTYPE:
155		case BI_MMUTYPE:
156			/* Already set up by head.S */
157			break;
158
159		case BI_MEMCHUNK:
160			if (m68k_num_memory < NUM_MEMINFO) {
161				m68k_memory[m68k_num_memory].addr = data[0];
162				m68k_memory[m68k_num_memory].size = data[1];
163				m68k_num_memory++;
164			} else
165				printk("m68k_parse_bootinfo: too many memory chunks\n");
166			break;
167
168		case BI_RAMDISK:
169			m68k_ramdisk.addr = data[0];
170			m68k_ramdisk.size = data[1];
171			break;
172
173		case BI_COMMAND_LINE:
174			strlcpy(m68k_command_line, (const char *)data,
175				sizeof(m68k_command_line));
176			break;
177
178		default:
179			if (MACH_IS_AMIGA)
180				unknown = amiga_parse_bootinfo(record);
181			else if (MACH_IS_ATARI)
182				unknown = atari_parse_bootinfo(record);
183			else if (MACH_IS_MAC)
184				unknown = mac_parse_bootinfo(record);
185			else if (MACH_IS_Q40)
186				unknown = q40_parse_bootinfo(record);
187			else if (MACH_IS_BVME6000)
188				unknown = bvme6000_parse_bootinfo(record);
189			else if (MACH_IS_MVME16x)
190				unknown = mvme16x_parse_bootinfo(record);
191			else if (MACH_IS_MVME147)
192				unknown = mvme147_parse_bootinfo(record);
193			else if (MACH_IS_HP300)
194				unknown = hp300_parse_bootinfo(record);
195			else if (MACH_IS_APOLLO)
196				unknown = apollo_parse_bootinfo(record);
197			else
198				unknown = 1;
199		}
200		if (unknown)
201			printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
202			       record->tag);
203		record = (struct bi_record *)((unsigned long)record +
204					      record->size);
205	}
206
207	m68k_realnum_memory = m68k_num_memory;
208#ifdef CONFIG_SINGLE_MEMORY_CHUNK
209	if (m68k_num_memory > 1) {
210		printk("Ignoring last %i chunks of physical memory\n",
211		       (m68k_num_memory - 1));
212		m68k_num_memory = 1;
213	}
214#endif
215}
216
217void __init setup_arch(char **cmdline_p)
218{
219#ifndef CONFIG_SUN3
220	int i;
221#endif
222
223	/* The bootinfo is located right after the kernel bss */
224	if (!CPU_IS_COLDFIRE)
225		m68k_parse_bootinfo((const struct bi_record *)_end);
226
227	if (CPU_IS_040)
228		m68k_is040or060 = 4;
229	else if (CPU_IS_060)
230		m68k_is040or060 = 6;
231
232	/* FIXME: m68k_fputype is passed in by Penguin booter, which can
233	 * be confused by software FPU emulation. BEWARE.
234	 * We should really do our own FPU check at startup.
235	 * [what do we do with buggy 68LC040s? if we have problems
236	 *  with them, we should add a test to check_bugs() below] */
237#ifndef CONFIG_M68KFPU_EMU_ONLY
238	/* clear the fpu if we have one */
239	if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
240		volatile int zero = 0;
241		asm volatile ("frestore %0" : : "m" (zero));
242	}
243#endif
244
245	if (CPU_IS_060) {
246		u32 pcr;
247
248		asm (".chip 68060; movec %%pcr,%0; .chip 68k"
249		     : "=d" (pcr));
250		if (((pcr >> 8) & 0xff) <= 5) {
251			printk("Enabling workaround for errata I14\n");
252			asm (".chip 68060; movec %0,%%pcr; .chip 68k"
253			     : : "d" (pcr | 0x20));
254		}
255	}
256
257	init_mm.start_code = PAGE_OFFSET;
258	init_mm.end_code = (unsigned long)_etext;
259	init_mm.end_data = (unsigned long)_edata;
260	init_mm.brk = (unsigned long)_end;
261
262#if defined(CONFIG_BOOTPARAM)
263	strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
264	m68k_command_line[CL_SIZE - 1] = 0;
265#endif /* CONFIG_BOOTPARAM */
266	*cmdline_p = m68k_command_line;
267	memcpy(boot_command_line, *cmdline_p, CL_SIZE);
268
269	parse_early_param();
270
271#ifdef CONFIG_DUMMY_CONSOLE
272	conswitchp = &dummy_con;
273#endif
274
275	switch (m68k_machtype) {
276#ifdef CONFIG_AMIGA
277	case MACH_AMIGA:
278		config_amiga();
279		break;
280#endif
281#ifdef CONFIG_ATARI
282	case MACH_ATARI:
283		config_atari();
284		break;
285#endif
286#ifdef CONFIG_MAC
287	case MACH_MAC:
288		config_mac();
289		break;
290#endif
291#ifdef CONFIG_SUN3
292	case MACH_SUN3:
293		config_sun3();
294		break;
295#endif
296#ifdef CONFIG_APOLLO
297	case MACH_APOLLO:
298		config_apollo();
299		break;
300#endif
301#ifdef CONFIG_MVME147
302	case MACH_MVME147:
303		config_mvme147();
304		break;
305#endif
306#ifdef CONFIG_MVME16x
307	case MACH_MVME16x:
308		config_mvme16x();
309		break;
310#endif
311#ifdef CONFIG_BVME6000
312	case MACH_BVME6000:
313		config_bvme6000();
314		break;
315#endif
316#ifdef CONFIG_HP300
317	case MACH_HP300:
318		config_hp300();
319		break;
320#endif
321#ifdef CONFIG_Q40
322	case MACH_Q40:
323		config_q40();
324		break;
325#endif
326#ifdef CONFIG_SUN3X
327	case MACH_SUN3X:
328		config_sun3x();
329		break;
330#endif
331#ifdef CONFIG_COLDFIRE
332	case MACH_M54XX:
333		config_BSP(NULL, 0);
334		break;
335#endif
336	default:
337		panic("No configuration setup");
338	}
339
340#ifdef CONFIG_NATFEAT
341	nf_init();
342#endif
343
344	paging_init();
345
346#ifndef CONFIG_SUN3
347	for (i = 1; i < m68k_num_memory; i++)
348		free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
349				  m68k_memory[i].size);
350#ifdef CONFIG_BLK_DEV_INITRD
351	if (m68k_ramdisk.size) {
352		reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
353				     m68k_ramdisk.addr, m68k_ramdisk.size,
354				     BOOTMEM_DEFAULT);
355		initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
356		initrd_end = initrd_start + m68k_ramdisk.size;
357		printk("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#endif
386}
387
388static int show_cpuinfo(struct seq_file *m, void *v)
389{
390	const char *cpu, *mmu, *fpu;
391	unsigned long clockfreq, clockfactor;
392
393#define LOOP_CYCLES_68020	(8)
394#define LOOP_CYCLES_68030	(8)
395#define LOOP_CYCLES_68040	(3)
396#define LOOP_CYCLES_68060	(1)
397#define LOOP_CYCLES_COLDFIRE	(2)
398
399	if (CPU_IS_020) {
400		cpu = "68020";
401		clockfactor = LOOP_CYCLES_68020;
402	} else if (CPU_IS_030) {
403		cpu = "68030";
404		clockfactor = LOOP_CYCLES_68030;
405	} else if (CPU_IS_040) {
406		cpu = "68040";
407		clockfactor = LOOP_CYCLES_68040;
408	} else if (CPU_IS_060) {
409		cpu = "68060";
410		clockfactor = LOOP_CYCLES_68060;
411	} else if (CPU_IS_COLDFIRE) {
412		cpu = "ColdFire";
413		clockfactor = LOOP_CYCLES_COLDFIRE;
414	} else {
415		cpu = "680x0";
416		clockfactor = 0;
417	}
418
419#ifdef CONFIG_M68KFPU_EMU_ONLY
420	fpu = "none(soft float)";
421#else
422	if (m68k_fputype & FPU_68881)
423		fpu = "68881";
424	else if (m68k_fputype & FPU_68882)
425		fpu = "68882";
426	else if (m68k_fputype & FPU_68040)
427		fpu = "68040";
428	else if (m68k_fputype & FPU_68060)
429		fpu = "68060";
430	else if (m68k_fputype & FPU_SUNFPA)
431		fpu = "Sun FPA";
432	else if (m68k_fputype & FPU_COLDFIRE)
433		fpu = "ColdFire";
434	else
435		fpu = "none";
436#endif
437
438	if (m68k_mmutype & MMU_68851)
439		mmu = "68851";
440	else if (m68k_mmutype & MMU_68030)
441		mmu = "68030";
442	else if (m68k_mmutype & MMU_68040)
443		mmu = "68040";
444	else if (m68k_mmutype & MMU_68060)
445		mmu = "68060";
446	else if (m68k_mmutype & MMU_SUN3)
447		mmu = "Sun-3";
448	else if (m68k_mmutype & MMU_APOLLO)
449		mmu = "Apollo";
450	else if (m68k_mmutype & MMU_COLDFIRE)
451		mmu = "ColdFire";
452	else
453		mmu = "unknown";
454
455	clockfreq = loops_per_jiffy * HZ * clockfactor;
456
457	seq_printf(m, "CPU:\t\t%s\n"
458		   "MMU:\t\t%s\n"
459		   "FPU:\t\t%s\n"
460		   "Clocking:\t%lu.%1luMHz\n"
461		   "BogoMips:\t%lu.%02lu\n"
462		   "Calibration:\t%lu loops\n",
463		   cpu, mmu, fpu,
464		   clockfreq/1000000,(clockfreq/100000)%10,
465		   loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
466		   loops_per_jiffy);
467	return 0;
468}
469
470static void *c_start(struct seq_file *m, loff_t *pos)
471{
472	return *pos < 1 ? (void *)1 : NULL;
473}
474static void *c_next(struct seq_file *m, void *v, loff_t *pos)
475{
476	++*pos;
477	return NULL;
478}
479static void c_stop(struct seq_file *m, void *v)
480{
481}
482const struct seq_operations cpuinfo_op = {
483	.start	= c_start,
484	.next	= c_next,
485	.stop	= c_stop,
486	.show	= show_cpuinfo,
487};
488
489#ifdef CONFIG_PROC_HARDWARE
490static int hardware_proc_show(struct seq_file *m, void *v)
491{
492	char model[80];
493	unsigned long mem;
494	int i;
495
496	if (mach_get_model)
497		mach_get_model(model);
498	else
499		strcpy(model, "Unknown m68k");
500
501	seq_printf(m, "Model:\t\t%s\n", model);
502	for (mem = 0, i = 0; i < m68k_num_memory; i++)
503		mem += m68k_memory[i].size;
504	seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
505
506	if (mach_get_hardware_list)
507		mach_get_hardware_list(m);
508
509	return 0;
510}
511
512static int hardware_proc_open(struct inode *inode, struct file *file)
513{
514	return single_open(file, hardware_proc_show, NULL);
515}
516
517static const struct file_operations hardware_proc_fops = {
518	.open		= hardware_proc_open,
519	.read		= seq_read,
520	.llseek		= seq_lseek,
521	.release	= single_release,
522};
523
524static int __init proc_hardware_init(void)
525{
526	proc_create("hardware", 0, NULL, &hardware_proc_fops);
527	return 0;
528}
529module_init(proc_hardware_init);
530#endif
531
532void check_bugs(void)
533{
534#ifndef CONFIG_M68KFPU_EMU
535	if (m68k_fputype == 0) {
536		printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
537			"WHICH IS REQUIRED BY LINUX/M68K ***\n");
538		printk(KERN_EMERG "Upgrade your hardware or join the FPU "
539			"emulation project\n");
540		panic("no FPU");
541	}
542#endif /* !CONFIG_M68KFPU_EMU */
543}
544
545#ifdef CONFIG_ADB
546static int __init adb_probe_sync_enable (char *str) {
547	extern int __adb_probe_sync;
548	__adb_probe_sync = 1;
549	return 1;
550}
551
552__setup("adb_sync", adb_probe_sync_enable);
553#endif /* CONFIG_ADB */
554