machdep.c revision 1.111 
1/*	$NetBSD: machdep.c,v 1.111 2011/02/08 20:20:21 rmind Exp $	*/
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1992, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department, The Mach Operating System project at
11 * Carnegie-Mellon University and Ralph Campbell.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 *	@(#)machdep.c	8.3 (Berkeley) 1/12/94
38 */
39
40#include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
41
42__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.111 2011/02/08 20:20:21 rmind Exp $");
43
44/* from: Utah Hdr: machdep.c 1.63 91/04/24 */
45
46#include "opt_ddb.h"
47#include "opt_execfmt.h"
48#include "opt_modular.h"
49
50#include <sys/param.h>
51#include <sys/systm.h>
52#include <sys/signalvar.h>
53#include <sys/kernel.h>
54#include <sys/proc.h>
55#include <sys/buf.h>
56#include <sys/reboot.h>
57#include <sys/conf.h>
58#include <sys/file.h>
59#include <sys/malloc.h>
60#include <sys/mbuf.h>
61#include <sys/msgbuf.h>
62#include <sys/ioctl.h>
63#include <sys/device.h>
64#include <sys/exec.h>
65#include <sys/mount.h>
66#include <sys/syscallargs.h>
67#include <sys/kcore.h>
68#include <sys/ksyms.h>
69
70#include <uvm/uvm_extern.h>
71
72#include <ufs/mfs/mfs_extern.h>		/* mfs_initminiroot() */
73
74#include <machine/cpu.h>
75#include <machine/intr.h>
76#include <machine/reg.h>
77#include <machine/psl.h>
78#include <machine/pte.h>
79#include <machine/autoconf.h>
80#include <machine/bootinfo.h>
81#include <machine/apbus.h>
82#include <machine/apcall.h>
83
84#include <mips/cache.h>
85#include <mips/locore.h>
86
87#define	_NEWSMIPS_BUS_DMA_PRIVATE
88#include <machine/bus.h>
89
90#ifdef DDB
91#include <machine/db_machdep.h>
92#include <ddb/db_access.h>
93#include <ddb/db_extern.h>
94#include <ddb/db_sym.h>
95#endif
96
97#include <machine/adrsmap.h>
98#include <machine/machConst.h>
99#include <newsmips/newsmips/machid.h>
100#include <dev/cons.h>
101
102#include "ksyms.h"
103
104/* Our exported CPU info; we can have only one. */
105struct cpu_info cpu_info_store;
106
107/* maps for VM objects */
108
109struct vm_map *phys_map = NULL;
110
111char *bootinfo = NULL;		/* pointer to bootinfo structure */
112int systype;			/* what type of NEWS we are */
113struct apbus_sysinfo *_sip = NULL;
114
115phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
116int mem_cluster_cnt;
117
118struct idrom idrom;
119void (*hardware_intr)(uint32_t, uint32_t, uint32_t, uint32_t);
120void (*enable_intr)(void);
121void (*disable_intr)(void);
122void (*enable_timer)(void);
123
124/*
125 *  Local functions.
126 */
127
128/* initialize bss, etc. from kernel start, before main() is called. */
129void mach_init(int, int, int, int);
130
131void prom_halt(int) __attribute__((__noreturn__));
132void to_monitor(int) __attribute__((__noreturn__));
133
134#ifdef DEBUG
135/* stacktrace code violates prototypes to get callee's registers */
136extern void stacktrace(void); /*XXX*/
137#endif
138
139/*
140 * safepri is a safe priority for sleep to set for a spin-wait
141 * during autoconfiguration or after a panic.  Used as an argument to splx().
142 * XXX disables interrupt 5 to disable mips3 on-chip clock, which also
143 * disables mips1 FPU interrupts.
144 */
145int safepri = MIPS3_PSL_LOWIPL;		/* XXX */
146
147/*
148 * This is a mask of bits to clear in the SR when we go to a
149 * given interrupt priority level.
150 */
151const uint32_t ipl_sr_bits[_IPL_N] = {
152	[IPL_NONE] = 0,
153	[IPL_SOFTCLOCK] =
154	    MIPS_SOFT_INT_MASK_0,
155	[IPL_SOFTNET] =
156	    MIPS_SOFT_INT_MASK_0 | MIPS_SOFT_INT_MASK_1,
157	[IPL_VM] =
158	    MIPS_SOFT_INT_MASK_0 | MIPS_SOFT_INT_MASK_1 |
159	    MIPS_INT_MASK_0 |
160	    MIPS_INT_MASK_1,
161	[IPL_SCHED] =
162	    MIPS_SOFT_INT_MASK_0 | MIPS_SOFT_INT_MASK_1 |
163	    MIPS_INT_MASK_0 |
164	    MIPS_INT_MASK_1 |
165	    MIPS_INT_MASK_2,
166};
167
168extern u_long bootdev;
169extern char edata[], end[];
170
171/*
172 * Do all the stuff that locore normally does before calling main().
173 * Process arguments passed to us by the prom monitor.
174 * Return the first page address following the system.
175 */
176void
177mach_init(int x_boothowto, int x_bootdev, int x_bootname, int x_maxmem)
178{
179	u_long first, last;
180	char *kernend;
181	struct btinfo_magic *bi_magic;
182	struct btinfo_bootarg *bi_arg;
183	struct btinfo_systype *bi_systype;
184#if NKSYMS || defined(DDB) || defined(MODULAR)
185	struct btinfo_symtab *bi_sym;
186	int nsym = 0;
187	char *ssym, *esym;
188
189	ssym = esym = NULL;	/* XXX: gcc */
190#endif
191	bi_arg = NULL;
192
193	bootinfo = (void *)BOOTINFO_ADDR;	/* XXX */
194	bi_magic = lookup_bootinfo(BTINFO_MAGIC);
195	if (bi_magic && bi_magic->magic == BOOTINFO_MAGIC) {
196		bi_arg = lookup_bootinfo(BTINFO_BOOTARG);
197		if (bi_arg) {
198			x_boothowto = bi_arg->howto;
199			x_bootdev = bi_arg->bootdev;
200			x_maxmem = bi_arg->maxmem;
201		}
202#if NKSYMS || defined(DDB) || defined(MODULAR)
203		bi_sym = lookup_bootinfo(BTINFO_SYMTAB);
204		if (bi_sym) {
205			nsym = bi_sym->nsym;
206			ssym = (void *)bi_sym->ssym;
207			esym = (void *)bi_sym->esym;
208		}
209#endif
210
211		bi_systype = lookup_bootinfo(BTINFO_SYSTYPE);
212		if (bi_systype)
213			systype = bi_systype->type;
214	} else {
215		/*
216		 * Running kernel is loaded by non-native loader;
217		 * clear the BSS segment here.
218		 */
219		memset(edata, 0, end - edata);
220	}
221
222	if (systype == 0)
223		systype = NEWS3400;	/* XXX compatibility for old boot */
224
225#ifdef news5000
226	if (systype == NEWS5000) {
227		int i;
228		char *bootspec = (char *)x_bootdev;
229
230		if (bi_arg == NULL)
231			panic("news5000 requires BTINFO_BOOTARG to boot");
232
233		_sip = (void *)bi_arg->sip;
234		x_maxmem = _sip->apbsi_memsize;
235		x_maxmem -= 0x00100000;	/* reserve 1MB for ROM monitor */
236		if (strncmp(bootspec, "scsi", 4) == 0) {
237			x_bootdev = (5 << 28) | 0;	 /* magic, sd */
238			bootspec += 4;
239			if (*bootspec != '(' /*)*/)
240				goto bootspec_end;
241			i = strtoul(bootspec + 1, &bootspec, 10);
242			x_bootdev |= (i << 24);		/* bus */
243			if (*bootspec != ',')
244				goto bootspec_end;
245			i = strtoul(bootspec + 1, &bootspec, 10);
246			x_bootdev |= (i / 10) << 20;	/* controller */
247			x_bootdev |= (i % 10) << 16;	/* unit */
248			if (*bootspec != ',')
249				goto bootspec_end;
250			i = strtoul(bootspec + 1, &bootspec, 10);
251			x_bootdev |= (i << 8);		/* partition */
252		}
253 bootspec_end:
254		consinit();
255	}
256#endif
257
258	/*
259	 * Save parameters into kernel work area.
260	 */
261	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_MAXMEMSIZE_ADDR)) = x_maxmem;
262	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_BOOTDEV_ADDR)) = x_bootdev;
263	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_BOOTSW_ADDR)) = x_boothowto;
264
265	kernend = (char *)mips_round_page(end);
266#if NKSYMS || defined(DDB) || defined(MODULAR)
267	if (nsym)
268		kernend = (char *)mips_round_page(esym);
269#endif
270
271	/*
272	 * Set the VM page size.
273	 */
274	uvm_setpagesize();
275
276	boothowto = x_boothowto;
277	bootdev = x_bootdev;
278	physmem = btoc(x_maxmem);
279
280	/*
281	 * Now that we know how much memory we have, initialize the
282	 * mem cluster array.
283	 */
284	mem_clusters[0].start = 0;		/* XXX is this correct? */
285	mem_clusters[0].size  = ctob(physmem);
286	mem_cluster_cnt = 1;
287
288	/*
289	 * Copy exception-dispatch code down to exception vector.
290	 * Initialize locore-function vector.
291	 * Clear out the I and D caches.
292	 */
293	mips_vector_init();
294
295	/*
296	 * We know the CPU type now.  Initialize our DMA tags (might
297	 * need this early).
298	 */
299	newsmips_bus_dma_init();
300
301#if NKSYMS || defined(DDB) || defined(MODULAR)
302	if (nsym)
303		ksyms_addsyms_elf(esym - ssym, ssym, esym);
304#endif
305
306#ifdef KADB
307	boothowto |= RB_KDB;
308#endif
309
310	/*
311	 * Check to see if a mini-root was loaded into memory. It resides
312	 * at the start of the next page just after the end of BSS.
313	 */
314	if (boothowto & RB_MINIROOT)
315		kernend += round_page(mfs_initminiroot(kernend));
316
317	/*
318	 * Load the rest of the available pages into the VM system.
319	 */
320	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
321	last = mem_clusters[0].start + mem_clusters[0].size;
322	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
323	    VM_FREELIST_DEFAULT);
324
325	/*
326	 * Initialize error message buffer (at end of core).
327	 */
328	mips_init_msgbuf();
329
330	/*
331	 * Initialize the virtual memory system.
332	 */
333	pmap_bootstrap();
334
335	/*
336	 * Allocate uarea page for lwp0 and set it.
337	 */
338	mips_init_lwp0_uarea();
339
340	/*
341	 * Determine what model of computer we are running on.
342	 */
343	switch (systype) {
344#ifdef news3400
345	case NEWS3400:
346		news3400_init();
347		strcpy(cpu_model, idrom.id_machine);
348		if (strcmp(cpu_model, "news3400") == 0 ||
349		    strcmp(cpu_model, "news3200") == 0 ||
350		    strcmp(cpu_model, "news3700") == 0) {
351			/*
352			 * Set up interrupt handling and I/O addresses.
353			 */
354			hardware_intr = news3400_intr;
355			cpuspeed = 10;
356		} else {
357			printf("kernel not configured for machine %s\n",
358			    cpu_model);
359		}
360		break;
361#endif
362
363#ifdef news5000
364	case NEWS5000:
365		news5000_init();
366		strcpy(cpu_model, idrom.id_machine);
367		if (strcmp(cpu_model, "news5000") == 0 ||
368		    strcmp(cpu_model, "news5900") == 0) {
369			/*
370			 * Set up interrupt handling and I/O addresses.
371			 */
372			hardware_intr = news5000_intr;
373			cpuspeed = 50;	/* ??? XXX */
374		} else {
375			printf("kernel not configured for machine %s\n",
376			    cpu_model);
377		}
378		break;
379#endif
380
381	default:
382		printf("kernel not configured for systype %d\n", systype);
383		break;
384	}
385}
386
387void
388mips_machdep_cache_config(void)
389{
390	/* All r4k news boxen have a 1MB L2 cache. */
391	if (CPUISMIPS3)
392		mips_sdcache_size = 1024 * 1024;
393}
394
395/*
396 * cpu_startup: allocate memory for variable-sized tables,
397 * initialize CPU, and do autoconfiguration.
398 */
399void
400cpu_startup(void)
401{
402	vaddr_t minaddr, maxaddr;
403	char pbuf[9];
404#ifdef DEBUG
405	extern int pmapdebug;
406	int opmapdebug = pmapdebug;
407
408	pmapdebug = 0;
409#endif
410
411	/*
412	 * Good {morning,afternoon,evening,night}.
413	 */
414	printf("%s%s", copyright, version);
415	printf("SONY NET WORK STATION, Model %s, ", idrom.id_model);
416	printf("Machine ID #%d\n", idrom.id_serial);
417	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
418	printf("total memory = %s\n", pbuf);
419
420	minaddr = 0;
421	/*
422	 * Allocate a submap for physio
423	 */
424	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
425	    VM_PHYS_SIZE, 0, false, NULL);
426
427	/*
428	 * No need to allocate an mbuf cluster submap.  Mbuf clusters
429	 * are allocated via the pool allocator, and we use KSEG to
430	 * map those pages.
431	 */
432
433#ifdef DEBUG
434	pmapdebug = opmapdebug;
435#endif
436	format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
437	printf("avail memory = %s\n", pbuf);
438}
439
440/*
441 * lookup_bootinfo:
442 * Look up information in bootinfo of boot loader.
443 */
444void *
445lookup_bootinfo(int type)
446{
447	struct btinfo_common *bt;
448	char *help = bootinfo;
449
450	/* Check for a bootinfo record first. */
451	if (help == NULL)
452		return NULL;
453
454	do {
455		bt = (struct btinfo_common *)help;
456		if (bt->type == type)
457			return (void *)help;
458		help += bt->next;
459	} while (bt->next != 0 &&
460		(size_t)help < (size_t)bootinfo + BOOTINFO_SIZE);
461
462	return NULL;
463}
464
465/*
466 * call PROM to halt or reboot.
467 */
468void
469prom_halt(int howto)
470
471{
472#ifdef news5000
473	if (systype == NEWS5000)
474		apcall_exit(howto);
475#endif
476#ifdef news3400
477	if (systype == NEWS3400)
478		to_monitor(howto);
479#endif
480	for (;;);
481}
482
483int	waittime = -1;
484
485void
486cpu_reboot(volatile int howto, char *bootstr)
487{
488
489	/* take a snap shot before clobbering any registers */
490	if (curlwp)
491		savectx(curpcb);
492
493#ifdef DEBUG
494	if (panicstr)
495		stacktrace();
496#endif
497
498	/* If system is cold, just halt. */
499	if (cold) {
500		howto |= RB_HALT;
501		goto haltsys;
502	}
503
504	/* If "always halt" was specified as a boot flag, obey. */
505	if ((boothowto & RB_HALT) != 0)
506		howto |= RB_HALT;
507
508	boothowto = howto;
509	if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
510		/*
511		 * Synchronize the disks....
512		 */
513		waittime = 0;
514		vfs_shutdown();
515
516		/*
517		 * If we've been adjusting the clock, the todr
518		 * will be out of synch; adjust it now.
519		 */
520		resettodr();
521	}
522
523	/* Disable interrupts. */
524	disable_intr();
525
526	splhigh();
527
528	/* If rebooting and a dump is requested do it. */
529#if 0
530	if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
531#else
532	if (howto & RB_DUMP)
533#endif
534		dumpsys();
535
536haltsys:
537
538	/* run any shutdown hooks */
539	doshutdownhooks();
540
541	pmf_system_shutdown(boothowto);
542
543	if ((howto & RB_POWERDOWN) == RB_POWERDOWN)
544		prom_halt(0x80);	/* rom monitor RB_PWOFF */
545
546	/* Finally, halt/reboot the system. */
547	printf("%s\n\n", howto & RB_HALT ? "halted." : "rebooting...");
548	prom_halt(howto & RB_HALT);
549	/*NOTREACHED*/
550}
551
552void
553delay(int n)
554{
555
556	DELAY(n);
557}
558
559void
560cpu_intr(uint32_t status, uint32_t cause, vaddr_t pc, uint32_t ipending)
561{
562	struct cpu_info *ci;
563
564	ci = curcpu();
565	ci->ci_data.cpu_nintr++;
566
567	/* device interrupts */
568	ci->ci_idepth++;
569	(*hardware_intr)(status, cause, pc, ipending);
570	ci->ci_idepth--;
571
572#ifdef __HAVE_FAST_SOFTINTS
573	/* software interrupts */
574	ipending &= (MIPS_SOFT_INT_MASK_1|MIPS_SOFT_INT_MASK_0);
575	if (ipending == 0)
576		return;
577	_clrsoftintr(ipending);
578	softintr_dispatch(ipending);
579#endif
580}
581