setup_mm.c revision a4df02a217e9787a4b967197d9d9030c3e3c1088 
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
77static struct mem_info m68k_ramdisk __initdata;
78
79static char m68k_command_line[CL_SIZE] __initdata;
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 */
87int (*mach_hwclk) (int, struct rtc_time*);
88EXPORT_SYMBOL(mach_hwclk);
89int (*mach_set_clock_mmss) (unsigned long);
90unsigned int (*mach_get_ss)(void);
91int (*mach_get_rtc_pll)(struct rtc_pll_info *);
92int (*mach_set_rtc_pll)(struct rtc_pll_info *);
93EXPORT_SYMBOL(mach_get_ss);
94EXPORT_SYMBOL(mach_get_rtc_pll);
95EXPORT_SYMBOL(mach_set_rtc_pll);
96void (*mach_reset)( void );
97void (*mach_halt)( void );
98void (*mach_power_off)( void );
99long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
100#ifdef CONFIG_HEARTBEAT
101void (*mach_heartbeat) (int);
102EXPORT_SYMBOL(mach_heartbeat);
103#endif
104#ifdef CONFIG_M68K_L2_CACHE
105void (*mach_l2_flush) (int);
106#endif
107#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
108void (*mach_beep)(unsigned int, unsigned int);
109EXPORT_SYMBOL(mach_beep);
110#endif
111#if defined(CONFIG_ISA) && defined(MULTI_ISA)
112int isa_type;
113int isa_sex;
114EXPORT_SYMBOL(isa_type);
115EXPORT_SYMBOL(isa_sex);
116#endif
117
118extern int amiga_parse_bootinfo(const struct bi_record *);
119extern int atari_parse_bootinfo(const struct bi_record *);
120extern int mac_parse_bootinfo(const struct bi_record *);
121extern int q40_parse_bootinfo(const struct bi_record *);
122extern int bvme6000_parse_bootinfo(const struct bi_record *);
123extern int mvme16x_parse_bootinfo(const struct bi_record *);
124extern int mvme147_parse_bootinfo(const struct bi_record *);
125extern int hp300_parse_bootinfo(const struct bi_record *);
126extern int apollo_parse_bootinfo(const struct bi_record *);
127
128extern void config_amiga(void);
129extern void config_atari(void);
130extern void config_mac(void);
131extern void config_sun3(void);
132extern void config_apollo(void);
133extern void config_mvme147(void);
134extern void config_mvme16x(void);
135extern void config_bvme6000(void);
136extern void config_hp300(void);
137extern void config_q40(void);
138extern void config_sun3x(void);
139
140#define MASK_256K 0xfffc0000
141
142extern void paging_init(void);
143
144static void __init m68k_parse_bootinfo(const struct bi_record *record)
145{
146	while (record->tag != BI_LAST) {
147		int unknown = 0;
148		const unsigned long *data = record->data;
149
150		switch (record->tag) {
151		case BI_MACHTYPE:
152		case BI_CPUTYPE:
153		case BI_FPUTYPE:
154		case BI_MMUTYPE:
155			/* Already set up by head.S */
156			break;
157
158		case BI_MEMCHUNK:
159			if (m68k_num_memory < NUM_MEMINFO) {
160				m68k_memory[m68k_num_memory].addr = data[0];
161				m68k_memory[m68k_num_memory].size = data[1];
162				m68k_num_memory++;
163			} else
164				printk("m68k_parse_bootinfo: too many memory chunks\n");
165			break;
166
167		case BI_RAMDISK:
168			m68k_ramdisk.addr = data[0];
169			m68k_ramdisk.size = data[1];
170			break;
171
172		case BI_COMMAND_LINE:
173			strlcpy(m68k_command_line, (const char *)data,
174				sizeof(m68k_command_line));
175			break;
176
177		default:
178			if (MACH_IS_AMIGA)
179				unknown = amiga_parse_bootinfo(record);
180			else if (MACH_IS_ATARI)
181				unknown = atari_parse_bootinfo(record);
182			else if (MACH_IS_MAC)
183				unknown = mac_parse_bootinfo(record);
184			else if (MACH_IS_Q40)
185				unknown = q40_parse_bootinfo(record);
186			else if (MACH_IS_BVME6000)
187				unknown = bvme6000_parse_bootinfo(record);
188			else if (MACH_IS_MVME16x)
189				unknown = mvme16x_parse_bootinfo(record);
190			else if (MACH_IS_MVME147)
191				unknown = mvme147_parse_bootinfo(record);
192			else if (MACH_IS_HP300)
193				unknown = hp300_parse_bootinfo(record);
194			else if (MACH_IS_APOLLO)
195				unknown = apollo_parse_bootinfo(record);
196			else
197				unknown = 1;
198		}
199		if (unknown)
200			printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n",
201			       record->tag);
202		record = (struct bi_record *)((unsigned long)record +
203					      record->size);
204	}
205
206	m68k_realnum_memory = m68k_num_memory;
207#ifdef CONFIG_SINGLE_MEMORY_CHUNK
208	if (m68k_num_memory > 1) {
209		printk("Ignoring last %i chunks of physical memory\n",
210		       (m68k_num_memory - 1));
211		m68k_num_memory = 1;
212	}
213#endif
214}
215
216void __init setup_arch(char **cmdline_p)
217{
218#ifndef CONFIG_SUN3
219	int i;
220#endif
221
222	/* The bootinfo is located right after the kernel bss */
223	if (!CPU_IS_COLDFIRE)
224		m68k_parse_bootinfo((const struct bi_record *)_end);
225
226	if (CPU_IS_040)
227		m68k_is040or060 = 4;
228	else if (CPU_IS_060)
229		m68k_is040or060 = 6;
230
231	/* FIXME: m68k_fputype is passed in by Penguin booter, which can
232	 * be confused by software FPU emulation. BEWARE.
233	 * We should really do our own FPU check at startup.
234	 * [what do we do with buggy 68LC040s? if we have problems
235	 *  with them, we should add a test to check_bugs() below] */
236#ifndef CONFIG_M68KFPU_EMU_ONLY
237	/* clear the fpu if we have one */
238	if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
239		volatile int zero = 0;
240		asm volatile ("frestore %0" : : "m" (zero));
241	}
242#endif
243
244	if (CPU_IS_060) {
245		u32 pcr;
246
247		asm (".chip 68060; movec %%pcr,%0; .chip 68k"
248		     : "=d" (pcr));
249		if (((pcr >> 8) & 0xff) <= 5) {
250			printk("Enabling workaround for errata I14\n");
251			asm (".chip 68060; movec %0,%%pcr; .chip 68k"
252			     : : "d" (pcr | 0x20));
253		}
254	}
255
256	init_mm.start_code = PAGE_OFFSET;
257	init_mm.end_code = (unsigned long)_etext;
258	init_mm.end_data = (unsigned long)_edata;
259	init_mm.brk = (unsigned long)_end;
260
261#if defined(CONFIG_BOOTPARAM)
262	strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
263	m68k_command_line[CL_SIZE - 1] = 0;
264#endif /* CONFIG_BOOTPARAM */
265	*cmdline_p = m68k_command_line;
266	memcpy(boot_command_line, *cmdline_p, CL_SIZE);
267
268	parse_early_param();
269
270#ifdef CONFIG_DUMMY_CONSOLE
271	conswitchp = &dummy_con;
272#endif
273
274	switch (m68k_machtype) {
275#ifdef CONFIG_AMIGA
276	case MACH_AMIGA:
277		config_amiga();
278		break;
279#endif
280#ifdef CONFIG_ATARI
281	case MACH_ATARI:
282		config_atari();
283		break;
284#endif
285#ifdef CONFIG_MAC
286	case MACH_MAC:
287		config_mac();
288		break;
289#endif
290#ifdef CONFIG_SUN3
291	case MACH_SUN3:
292		config_sun3();
293		break;
294#endif
295#ifdef CONFIG_APOLLO
296	case MACH_APOLLO:
297		config_apollo();
298		break;
299#endif
300#ifdef CONFIG_MVME147
301	case MACH_MVME147:
302		config_mvme147();
303		break;
304#endif
305#ifdef CONFIG_MVME16x
306	case MACH_MVME16x:
307		config_mvme16x();
308		break;
309#endif
310#ifdef CONFIG_BVME6000
311	case MACH_BVME6000:
312		config_bvme6000();
313		break;
314#endif
315#ifdef CONFIG_HP300
316	case MACH_HP300:
317		config_hp300();
318		break;
319#endif
320#ifdef CONFIG_Q40
321	case MACH_Q40:
322		config_q40();
323		break;
324#endif
325#ifdef CONFIG_SUN3X
326	case MACH_SUN3X:
327		config_sun3x();
328		break;
329#endif
330#ifdef CONFIG_COLDFIRE
331	case MACH_M54XX:
332		config_BSP(NULL, 0);
333		break;
334#endif
335	default:
336		panic("No configuration setup");
337	}
338
339#ifdef CONFIG_NATFEAT
340	nf_init();
341#endif
342
343	paging_init();
344
345#ifndef CONFIG_SUN3
346	for (i = 1; i < m68k_num_memory; i++)
347		free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
348				  m68k_memory[i].size);
349#ifdef CONFIG_BLK_DEV_INITRD
350	if (m68k_ramdisk.size) {
351		reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
352				     m68k_ramdisk.addr, m68k_ramdisk.size,
353				     BOOTMEM_DEFAULT);
354		initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
355		initrd_end = initrd_start + m68k_ramdisk.size;
356		printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
357	}
358#endif
359
360#ifdef CONFIG_ATARI
361	if (MACH_IS_ATARI)
362		atari_stram_reserve_pages((void *)availmem);
363#endif
364#ifdef CONFIG_SUN3X
365	if (MACH_IS_SUN3X) {
366		dvma_init();
367	}
368#endif
369
370#endif /* !CONFIG_SUN3 */
371
372/* set ISA defs early as possible */
373#if defined(CONFIG_ISA) && defined(MULTI_ISA)
374	if (MACH_IS_Q40) {
375		isa_type = ISA_TYPE_Q40;
376		isa_sex = 0;
377	}
378#ifdef CONFIG_AMIGA_PCMCIA
379	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
380		isa_type = ISA_TYPE_AG;
381		isa_sex = 1;
382	}
383#endif
384#ifdef CONFIG_ATARI_ROM_ISA
385	if (MACH_IS_ATARI) {
386		isa_type = ISA_TYPE_ENEC;
387		isa_sex = 0;
388	}
389#endif
390#endif
391}
392
393static int show_cpuinfo(struct seq_file *m, void *v)
394{
395	const char *cpu, *mmu, *fpu;
396	unsigned long clockfreq, clockfactor;
397
398#define LOOP_CYCLES_68020	(8)
399#define LOOP_CYCLES_68030	(8)
400#define LOOP_CYCLES_68040	(3)
401#define LOOP_CYCLES_68060	(1)
402#define LOOP_CYCLES_COLDFIRE	(2)
403
404	if (CPU_IS_020) {
405		cpu = "68020";
406		clockfactor = LOOP_CYCLES_68020;
407	} else if (CPU_IS_030) {
408		cpu = "68030";
409		clockfactor = LOOP_CYCLES_68030;
410	} else if (CPU_IS_040) {
411		cpu = "68040";
412		clockfactor = LOOP_CYCLES_68040;
413	} else if (CPU_IS_060) {
414		cpu = "68060";
415		clockfactor = LOOP_CYCLES_68060;
416	} else if (CPU_IS_COLDFIRE) {
417		cpu = "ColdFire";
418		clockfactor = LOOP_CYCLES_COLDFIRE;
419	} else {
420		cpu = "680x0";
421		clockfactor = 0;
422	}
423
424#ifdef CONFIG_M68KFPU_EMU_ONLY
425	fpu = "none(soft float)";
426#else
427	if (m68k_fputype & FPU_68881)
428		fpu = "68881";
429	else if (m68k_fputype & FPU_68882)
430		fpu = "68882";
431	else if (m68k_fputype & FPU_68040)
432		fpu = "68040";
433	else if (m68k_fputype & FPU_68060)
434		fpu = "68060";
435	else if (m68k_fputype & FPU_SUNFPA)
436		fpu = "Sun FPA";
437	else if (m68k_fputype & FPU_COLDFIRE)
438		fpu = "ColdFire";
439	else
440		fpu = "none";
441#endif
442
443	if (m68k_mmutype & MMU_68851)
444		mmu = "68851";
445	else if (m68k_mmutype & MMU_68030)
446		mmu = "68030";
447	else if (m68k_mmutype & MMU_68040)
448		mmu = "68040";
449	else if (m68k_mmutype & MMU_68060)
450		mmu = "68060";
451	else if (m68k_mmutype & MMU_SUN3)
452		mmu = "Sun-3";
453	else if (m68k_mmutype & MMU_APOLLO)
454		mmu = "Apollo";
455	else if (m68k_mmutype & MMU_COLDFIRE)
456		mmu = "ColdFire";
457	else
458		mmu = "unknown";
459
460	clockfreq = loops_per_jiffy * HZ * clockfactor;
461
462	seq_printf(m, "CPU:\t\t%s\n"
463		   "MMU:\t\t%s\n"
464		   "FPU:\t\t%s\n"
465		   "Clocking:\t%lu.%1luMHz\n"
466		   "BogoMips:\t%lu.%02lu\n"
467		   "Calibration:\t%lu loops\n",
468		   cpu, mmu, fpu,
469		   clockfreq/1000000,(clockfreq/100000)%10,
470		   loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
471		   loops_per_jiffy);
472	return 0;
473}
474
475static void *c_start(struct seq_file *m, loff_t *pos)
476{
477	return *pos < 1 ? (void *)1 : NULL;
478}
479static void *c_next(struct seq_file *m, void *v, loff_t *pos)
480{
481	++*pos;
482	return NULL;
483}
484static void c_stop(struct seq_file *m, void *v)
485{
486}
487const struct seq_operations cpuinfo_op = {
488	.start	= c_start,
489	.next	= c_next,
490	.stop	= c_stop,
491	.show	= show_cpuinfo,
492};
493
494#ifdef CONFIG_PROC_HARDWARE
495static int hardware_proc_show(struct seq_file *m, void *v)
496{
497	char model[80];
498	unsigned long mem;
499	int i;
500
501	if (mach_get_model)
502		mach_get_model(model);
503	else
504		strcpy(model, "Unknown m68k");
505
506	seq_printf(m, "Model:\t\t%s\n", model);
507	for (mem = 0, i = 0; i < m68k_num_memory; i++)
508		mem += m68k_memory[i].size;
509	seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
510
511	if (mach_get_hardware_list)
512		mach_get_hardware_list(m);
513
514	return 0;
515}
516
517static int hardware_proc_open(struct inode *inode, struct file *file)
518{
519	return single_open(file, hardware_proc_show, NULL);
520}
521
522static const struct file_operations hardware_proc_fops = {
523	.open		= hardware_proc_open,
524	.read		= seq_read,
525	.llseek		= seq_lseek,
526	.release	= single_release,
527};
528
529static int __init proc_hardware_init(void)
530{
531	proc_create("hardware", 0, NULL, &hardware_proc_fops);
532	return 0;
533}
534module_init(proc_hardware_init);
535#endif
536
537void check_bugs(void)
538{
539#ifndef CONFIG_M68KFPU_EMU
540	if (m68k_fputype == 0) {
541		printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
542			"WHICH IS REQUIRED BY LINUX/M68K ***\n");
543		printk(KERN_EMERG "Upgrade your hardware or join the FPU "
544			"emulation project\n");
545		panic("no FPU");
546	}
547#endif /* !CONFIG_M68KFPU_EMU */
548}
549
550#ifdef CONFIG_ADB
551static int __init adb_probe_sync_enable (char *str) {
552	extern int __adb_probe_sync;
553	__adb_probe_sync = 1;
554	return 1;
555}
556
557__setup("adb_sync", adb_probe_sync_enable);
558#endif /* CONFIG_ADB */
559