machdep.c revision 1.118 
1/*	$NetBSD: machdep.c,v 1.118 2016/07/21 19:49:59 christos 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 1.118 2016/07/21 19:49:59 christos 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#define __INTR_PRIVATE
51
52#include <sys/param.h>
53#include <sys/systm.h>
54#include <sys/signalvar.h>
55#include <sys/kernel.h>
56#include <sys/proc.h>
57#include <sys/buf.h>
58#include <sys/reboot.h>
59#include <sys/conf.h>
60#include <sys/file.h>
61#include <sys/malloc.h>
62#include <sys/mbuf.h>
63#include <sys/msgbuf.h>
64#include <sys/ioctl.h>
65#include <sys/device.h>
66#include <sys/exec.h>
67#include <sys/mount.h>
68#include <sys/syscallargs.h>
69#include <sys/kcore.h>
70#include <sys/ksyms.h>
71#include <sys/cpu.h>
72#include <sys/intr.h>
73
74#include <uvm/uvm_extern.h>
75
76#include <ufs/mfs/mfs_extern.h>		/* mfs_initminiroot() */
77
78#include <mips/cache.h>
79#include <mips/locore.h>
80
81#include <machine/reg.h>
82#include <machine/psl.h>
83#include <machine/pte.h>
84#include <machine/autoconf.h>
85#include <machine/bootinfo.h>
86#include <machine/apbus.h>
87#include <machine/apcall.h>
88
89
90#define	_NEWSMIPS_BUS_DMA_PRIVATE
91#include <machine/bus.h>
92
93#ifdef DDB
94#include <machine/db_machdep.h>
95#include <ddb/db_access.h>
96#include <ddb/db_extern.h>
97#include <ddb/db_sym.h>
98#endif
99
100#include <machine/adrsmap.h>
101#include <machine/machConst.h>
102#include <newsmips/newsmips/machid.h>
103#include <dev/cons.h>
104
105#include "ksyms.h"
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)(int, vaddr_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
139extern u_long bootdev;
140extern char edata[], end[];
141
142/*
143 * Do all the stuff that locore normally does before calling main().
144 * Process arguments passed to us by the prom monitor.
145 * Return the first page address following the system.
146 */
147void
148mach_init(int x_boothowto, int x_bootdev, int x_bootname, int x_maxmem)
149{
150	u_long first, last;
151	char *kernend;
152	const char *model;
153	struct btinfo_magic *bi_magic;
154	struct btinfo_bootarg *bi_arg;
155	struct btinfo_systype *bi_systype;
156#if NKSYMS || defined(DDB) || defined(MODULAR)
157	struct btinfo_symtab *bi_sym;
158	int nsym = 0;
159	char *ssym, *esym;
160
161	ssym = esym = NULL;	/* XXX: gcc */
162#endif
163	bi_arg = NULL;
164
165	bootinfo = (void *)BOOTINFO_ADDR;	/* XXX */
166	bi_magic = lookup_bootinfo(BTINFO_MAGIC);
167	if (bi_magic && bi_magic->magic == BOOTINFO_MAGIC) {
168		bi_arg = lookup_bootinfo(BTINFO_BOOTARG);
169		if (bi_arg) {
170			x_boothowto = bi_arg->howto;
171			x_bootdev = bi_arg->bootdev;
172			x_maxmem = bi_arg->maxmem;
173		}
174#if NKSYMS || defined(DDB) || defined(MODULAR)
175		bi_sym = lookup_bootinfo(BTINFO_SYMTAB);
176		if (bi_sym) {
177			nsym = bi_sym->nsym;
178			ssym = (void *)bi_sym->ssym;
179			esym = (void *)bi_sym->esym;
180		}
181#endif
182
183		bi_systype = lookup_bootinfo(BTINFO_SYSTYPE);
184		if (bi_systype)
185			systype = bi_systype->type;
186	} else {
187		/*
188		 * Running kernel is loaded by non-native loader;
189		 * clear the BSS segment here.
190		 */
191		memset(edata, 0, end - edata);
192	}
193
194	if (systype == 0)
195		systype = NEWS3400;	/* XXX compatibility for old boot */
196
197#ifdef news5000
198	if (systype == NEWS5000) {
199		int i;
200		char *bspec = (char *)x_bootdev;
201
202		if (bi_arg == NULL)
203			panic("news5000 requires BTINFO_BOOTARG to boot");
204
205		_sip = (void *)bi_arg->sip;
206		x_maxmem = _sip->apbsi_memsize;
207		x_maxmem -= 0x00100000;	/* reserve 1MB for ROM monitor */
208		if (strncmp(bspec, "scsi", 4) == 0) {
209			x_bootdev = (5 << 28) | 0;	 /* magic, sd */
210			bspec += 4;
211			if (*bspec != '(' /*)*/)
212				goto bootspec_end;
213			i = strtoul(bspec + 1, &bspec, 10);
214			x_bootdev |= (i << 24);		/* bus */
215			if (*bspec != ',')
216				goto bootspec_end;
217			i = strtoul(bspec + 1, &bspec, 10);
218			x_bootdev |= (i / 10) << 20;	/* controller */
219			x_bootdev |= (i % 10) << 16;	/* unit */
220			if (*bspec != ',')
221				goto bootspec_end;
222			i = strtoul(bspec + 1, &bspec, 10);
223			x_bootdev |= (i << 8);		/* partition */
224		}
225 bootspec_end:
226		consinit();
227	}
228#endif
229
230	/*
231	 * Save parameters into kernel work area.
232	 */
233	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_MAXMEMSIZE_ADDR)) = x_maxmem;
234	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_BOOTDEV_ADDR)) = x_bootdev;
235	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_BOOTSW_ADDR)) = x_boothowto;
236
237	kernend = (char *)mips_round_page(end);
238#if NKSYMS || defined(DDB) || defined(MODULAR)
239	if (nsym)
240		kernend = (char *)mips_round_page(esym);
241#endif
242
243	/*
244	 * Set the VM page size.
245	 */
246	uvm_setpagesize();
247
248	boothowto = x_boothowto;
249	bootdev = x_bootdev;
250	physmem = btoc(x_maxmem);
251
252	/*
253	 * Now that we know how much memory we have, initialize the
254	 * mem cluster array.
255	 */
256	mem_clusters[0].start = 0;		/* XXX is this correct? */
257	mem_clusters[0].size  = ctob(physmem);
258	mem_cluster_cnt = 1;
259
260	/*
261	 * Copy exception-dispatch code down to exception vector.
262	 * Initialize locore-function vector.
263	 * Clear out the I and D caches.
264	 */
265	mips_vector_init(NULL, false);
266
267	/*
268	 * We know the CPU type now.  Initialize our DMA tags (might
269	 * need this early).
270	 */
271	newsmips_bus_dma_init();
272
273#if NKSYMS || defined(DDB) || defined(MODULAR)
274	if (nsym)
275		ksyms_addsyms_elf(esym - ssym, ssym, esym);
276#endif
277
278#ifdef KADB
279	boothowto |= RB_KDB;
280#endif
281
282	/*
283	 * Check to see if a mini-root was loaded into memory. It resides
284	 * at the start of the next page just after the end of BSS.
285	 */
286	if (boothowto & RB_MINIROOT)
287		kernend += round_page(mfs_initminiroot(kernend));
288
289	/*
290	 * Load the rest of the available pages into the VM system.
291	 */
292	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
293	last = mem_clusters[0].start + mem_clusters[0].size;
294	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
295	    VM_FREELIST_DEFAULT);
296
297	/*
298	 * Initialize error message buffer (at end of core).
299	 */
300	mips_init_msgbuf();
301
302	/*
303	 * Initialize the virtual memory system.
304	 */
305	pmap_bootstrap();
306
307	/*
308	 * Allocate uarea page for lwp0 and set it.
309	 */
310	mips_init_lwp0_uarea();
311
312	/*
313	 * Determine what model of computer we are running on.
314	 */
315	switch (systype) {
316#ifdef news3400
317	case NEWS3400:
318		news3400_init();
319		cpu_setmodel("%s", idrom.id_machine);
320		model = cpu_getmodel();
321		if (strcmp(model, "news3400") == 0 ||
322		    strcmp(model, "news3200") == 0 ||
323		    strcmp(model, "news3700") == 0) {
324			/*
325			 * Set up interrupt handling and I/O addresses.
326			 */
327			hardware_intr = news3400_intr;
328			cpuspeed = 10;
329		} else {
330			printf("kernel not configured for machine %s\n", model);
331		}
332		break;
333#endif
334
335#ifdef news5000
336	case NEWS5000:
337		news5000_init();
338		cpu_setmodel("%s", idrom.id_machine);
339		model = cpu_getmodel();
340		if (strcmp(model, "news5000") == 0 ||
341		    strcmp(model, "news5900") == 0) {
342			/*
343			 * Set up interrupt handling and I/O addresses.
344			 */
345			hardware_intr = news5000_intr;
346			cpuspeed = 50;	/* ??? XXX */
347		} else {
348			printf("kernel not configured for machine %s\n", model);
349		}
350		break;
351#endif
352
353	default:
354		printf("kernel not configured for systype %d\n", systype);
355		break;
356	}
357}
358
359void
360mips_machdep_cache_config(void)
361{
362	/* All r4k news boxen have a 1MB L2 cache. */
363	if (CPUISMIPS3)
364		mips_cache_info.mci_sdcache_size = 1024 * 1024;
365}
366
367/*
368 * cpu_startup: allocate memory for variable-sized tables,
369 * initialize CPU, and do autoconfiguration.
370 */
371void
372cpu_startup(void)
373{
374	printf("SONY NET WORK STATION, Model %s, ", idrom.id_model);
375	printf("Machine ID #%d\n", idrom.id_serial);
376
377	cpu_startup_common();
378}
379
380/*
381 * lookup_bootinfo:
382 * Look up information in bootinfo of boot loader.
383 */
384void *
385lookup_bootinfo(int type)
386{
387	struct btinfo_common *bt;
388	char *help = bootinfo;
389
390	/* Check for a bootinfo record first. */
391	if (help == NULL)
392		return NULL;
393
394	do {
395		bt = (struct btinfo_common *)help;
396		if (bt->type == type)
397			return (void *)help;
398		help += bt->next;
399	} while (bt->next != 0 &&
400		(size_t)help < (size_t)bootinfo + BOOTINFO_SIZE);
401
402	return NULL;
403}
404
405/*
406 * call PROM to halt or reboot.
407 */
408void
409prom_halt(int howto)
410
411{
412#ifdef news5000
413	if (systype == NEWS5000)
414		apcall_exit(howto);
415#endif
416#ifdef news3400
417	if (systype == NEWS3400)
418		to_monitor(howto);
419#endif
420	for (;;);
421}
422
423int	waittime = -1;
424
425void
426cpu_reboot(volatile int howto, char *bootstr)
427{
428
429	/* take a snap shot before clobbering any registers */
430	savectx(curpcb);
431
432#ifdef DEBUG
433	if (panicstr)
434		stacktrace();
435#endif
436
437	/* If system is cold, just halt. */
438	if (cold) {
439		howto |= RB_HALT;
440		goto haltsys;
441	}
442
443	/* If "always halt" was specified as a boot flag, obey. */
444	if ((boothowto & RB_HALT) != 0)
445		howto |= RB_HALT;
446
447	boothowto = howto;
448	if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
449		/*
450		 * Synchronize the disks....
451		 */
452		waittime = 0;
453		vfs_shutdown();
454
455		/*
456		 * If we've been adjusting the clock, the todr
457		 * will be out of synch; adjust it now.
458		 */
459		resettodr();
460	}
461
462	/* Disable interrupts. */
463	disable_intr();
464
465	splhigh();
466
467	/* If rebooting and a dump is requested do it. */
468#if 0
469	if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
470#else
471	if (howto & RB_DUMP)
472#endif
473		dumpsys();
474
475haltsys:
476
477	/* run any shutdown hooks */
478	doshutdownhooks();
479
480	pmf_system_shutdown(boothowto);
481
482	if ((howto & RB_POWERDOWN) == RB_POWERDOWN)
483		prom_halt(0x80);	/* rom monitor RB_PWOFF */
484
485	/* Finally, halt/reboot the system. */
486	printf("%s\n\n", howto & RB_HALT ? "halted." : "rebooting...");
487	prom_halt(howto & RB_HALT);
488	/*NOTREACHED*/
489}
490
491void
492delay(int n)
493{
494
495	DELAY(n);
496}
497
498void
499cpu_intr(int ppl, vaddr_t pc, uint32_t status)
500{
501	curcpu()->ci_data.cpu_nintr++;
502
503	/* device interrupts */
504	(*hardware_intr)(ppl, pc, status);
505}
506