1/*	$NetBSD: machdep.c,v 1.123 2024/03/05 14:15:33 thorpej 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 1.123 2024/03/05 14:15:33 thorpej 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/mbuf.h>
62#include <sys/msgbuf.h>
63#include <sys/ioctl.h>
64#include <sys/device.h>
65#include <sys/exec.h>
66#include <sys/mount.h>
67#include <sys/syscallargs.h>
68#include <sys/kcore.h>
69#include <sys/ksyms.h>
70#include <sys/cpu.h>
71#include <sys/intr.h>
72
73#include <uvm/uvm_extern.h>
74
75#include <ufs/mfs/mfs_extern.h>		/* mfs_initminiroot() */
76
77#include <mips/cache.h>
78#include <mips/locore.h>
79
80#include <machine/reg.h>
81#include <machine/psl.h>
82#include <machine/pte.h>
83#include <machine/autoconf.h>
84#include <machine/bootinfo.h>
85#include <machine/apbus.h>
86#include <machine/apcall.h>
87
88
89#define	_NEWSMIPS_BUS_DMA_PRIVATE
90#include <machine/bus.h>
91
92#ifdef DDB
93#include <machine/db_machdep.h>
94#include <ddb/db_access.h>
95#include <ddb/db_extern.h>
96#include <ddb/db_sym.h>
97#endif
98
99#include <machine/adrsmap.h>
100#include <machine/machConst.h>
101#include <newsmips/newsmips/machid.h>
102#include <dev/cons.h>
103
104#include "ksyms.h"
105
106/* maps for VM objects */
107
108struct vm_map *phys_map = NULL;
109
110char *bootinfo = NULL;		/* pointer to bootinfo structure */
111int systype;			/* what type of NEWS we are */
112struct apbus_sysinfo *_sip = NULL;
113void *sccport0a;
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 news3400
198	if (systype == NEWS3400) {
199		sccport0a = (void *)SCCPORT0A;
200	}
201#endif
202
203#if defined(news5000) || defined(news4000)
204	if (systype == NEWS5000 || systype == NEWS4000) {
205		int i;
206		char *bspec = (char *)x_bootdev;
207
208		if (bi_arg == NULL)
209			panic("%s requires BTINFO_BOOTARG to boot",
210			    systype == NEWS5000 ? "news5000" : "news4000");
211
212		_sip = (void *)bi_arg->sip;
213		x_maxmem = _sip->apbsi_memsize;
214		x_maxmem -= 0x00100000;	/* reserve 1MB for ROM monitor */
215		if (strncmp(bspec, "scsi", 4) == 0) {
216			x_bootdev = (5 << 28) | 0;	 /* magic, sd */
217			bspec += 4;
218			if (*bspec != '(' /*)*/)
219				goto bootspec_end;
220			i = strtoul(bspec + 1, &bspec, 10);
221			x_bootdev |= (i << 24);		/* bus */
222			if (*bspec != ',')
223				goto bootspec_end;
224			i = strtoul(bspec + 1, &bspec, 10);
225			x_bootdev |= (i / 10) << 20;	/* controller */
226			x_bootdev |= (i % 10) << 16;	/* unit */
227			if (*bspec != ',')
228				goto bootspec_end;
229			i = strtoul(bspec + 1, &bspec, 10);
230			x_bootdev |= (i << 8);		/* partition */
231		}
232 bootspec_end:
233		sccport0a = (systype == NEWS5000) ?
234		    (void *)NEWS5000_SCCPORT0A : (void *)NEWS4000_SCCPORT0A;
235		consinit();
236	}
237#endif /* news5000 || news4000 */
238
239	/*
240	 * Save parameters into kernel work area.
241	 */
242	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_MAXMEMSIZE_ADDR)) = x_maxmem;
243	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_BOOTDEV_ADDR)) = x_bootdev;
244	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_BOOTSW_ADDR)) = x_boothowto;
245
246	kernend = (char *)mips_round_page(end);
247#if NKSYMS || defined(DDB) || defined(MODULAR)
248	if (nsym)
249		kernend = (char *)mips_round_page(esym);
250#endif
251
252	uvm_md_init();
253
254	boothowto = x_boothowto;
255	bootdev = x_bootdev;
256	physmem = btoc(x_maxmem);
257
258	/*
259	 * Now that we know how much memory we have, initialize the
260	 * mem cluster array.
261	 */
262	mem_clusters[0].start = 0;		/* XXX is this correct? */
263	mem_clusters[0].size  = ctob(physmem);
264	mem_cluster_cnt = 1;
265
266	/*
267	 * Copy exception-dispatch code down to exception vector.
268	 * Initialize locore-function vector.
269	 * Clear out the I and D caches.
270	 */
271	mips_vector_init(NULL, false);
272
273	/*
274	 * We know the CPU type now.  Initialize our DMA tags (might
275	 * need this early).
276	 */
277	newsmips_bus_dma_init();
278
279#if NKSYMS || defined(DDB) || defined(MODULAR)
280	if (nsym)
281		ksyms_addsyms_elf(esym - ssym, ssym, esym);
282#endif
283
284#ifdef KADB
285	boothowto |= RB_KDB;
286#endif
287
288	/*
289	 * Check to see if a mini-root was loaded into memory. It resides
290	 * at the start of the next page just after the end of BSS.
291	 */
292	if (boothowto & RB_MINIROOT)
293		kernend += round_page(mfs_initminiroot(kernend));
294
295	/*
296	 * Load the rest of the available pages into the VM system.
297	 */
298	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
299	last = mem_clusters[0].start + mem_clusters[0].size;
300	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
301	    VM_FREELIST_DEFAULT);
302
303	/*
304	 * Initialize error message buffer (at end of core).
305	 */
306	mips_init_msgbuf();
307
308	/*
309	 * Initialize the virtual memory system.
310	 */
311	pmap_bootstrap();
312
313	/*
314	 * Allocate uarea page for lwp0 and set it.
315	 */
316	mips_init_lwp0_uarea();
317
318	/*
319	 * Determine what model of computer we are running on.
320	 */
321	switch (systype) {
322#ifdef news3400
323	case NEWS3400:
324		news3400_init();
325		cpu_setmodel("%s", idrom.id_machine);
326		model = cpu_getmodel();
327		if (strcmp(model, "news3400") == 0 ||
328		    strcmp(model, "news3200") == 0 ||
329		    strcmp(model, "news3700") == 0) {
330			/*
331			 * Set up interrupt handling and I/O addresses.
332			 */
333			hardware_intr = news3400_intr;
334			cpuspeed = 10;
335		} else {
336			printf("kernel not configured for machine %s\n", model);
337		}
338		break;
339#endif
340
341#ifdef news5000
342	case NEWS5000:
343		news5000_init();
344		cpu_setmodel("%s", idrom.id_machine);
345		model = cpu_getmodel();
346		if (strcmp(model, "news5000") == 0 ||
347		    strcmp(model, "news5900") == 0) {
348			/*
349			 * Set up interrupt handling and I/O addresses.
350			 */
351			hardware_intr = news5000_intr;
352			cpuspeed = 50;	/* ??? XXX */
353		} else {
354			printf("kernel not configured for machine %s\n", model);
355		}
356		break;
357#endif
358
359#ifdef news4000
360	case NEWS4000:
361		news4000_init();
362		cpu_setmodel("%s", idrom.id_machine);
363		model = cpu_getmodel();
364		if (strcmp(model, "news4000") == 0) {
365			/*
366			 * Set up interrupt handling and I/O addresses.
367			 */
368			hardware_intr = news4000_intr;
369			cpuspeed = 40;  /* ??? XXX */
370		} else {
371			printf("kernel not configured for machine %s\n", model);
372		}
373		break;
374#endif
375
376	default:
377		printf("kernel not configured for systype %d\n", systype);
378		break;
379	}
380}
381
382void
383mips_machdep_cache_config(void)
384{
385	/* All r4k news boxen have a 1MB L2 cache. */
386	if (CPUISMIPS3)
387		mips_cache_info.mci_sdcache_size = 1024 * 1024;
388}
389
390/*
391 * cpu_startup: allocate memory for variable-sized tables,
392 * initialize CPU, and do autoconfiguration.
393 */
394void
395cpu_startup(void)
396{
397	printf("SONY NET WORK STATION, Model %s, ", idrom.id_model);
398	printf("Machine ID #%d\n", idrom.id_serial);
399
400	cpu_startup_common();
401}
402
403/*
404 * lookup_bootinfo:
405 * Look up information in bootinfo of boot loader.
406 */
407void *
408lookup_bootinfo(int type)
409{
410	struct btinfo_common *bt;
411	char *help = bootinfo;
412
413	/* Check for a bootinfo record first. */
414	if (help == NULL)
415		return NULL;
416
417	do {
418		bt = (struct btinfo_common *)help;
419		if (bt->type == type)
420			return (void *)help;
421		help += bt->next;
422	} while (bt->next != 0 &&
423		(size_t)help < (size_t)bootinfo + BOOTINFO_SIZE);
424
425	return NULL;
426}
427
428/*
429 * call PROM to halt or reboot.
430 */
431void
432prom_halt(int howto)
433
434{
435#if defined(news5000) || defined(news4000)
436	if (systype == NEWS5000 || systype == NEWS4000)
437		apcall_exit(howto);
438#endif
439#ifdef news3400
440	if (systype == NEWS3400)
441		to_monitor(howto);
442#endif
443	for (;;);
444}
445
446int	waittime = -1;
447
448void
449cpu_reboot(volatile int howto, char *bootstr)
450{
451
452	/* take a snap shot before clobbering any registers */
453	savectx(curpcb);
454
455#ifdef DEBUG
456	if (panicstr)
457		stacktrace();
458#endif
459
460	/* If system is cold, just halt. */
461	if (cold) {
462		howto |= RB_HALT;
463		goto haltsys;
464	}
465
466	/* If "always halt" was specified as a boot flag, obey. */
467	if ((boothowto & RB_HALT) != 0)
468		howto |= RB_HALT;
469
470	boothowto = howto;
471	if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
472		/*
473		 * Synchronize the disks....
474		 */
475		waittime = 0;
476		vfs_shutdown();
477	}
478
479	/* Disable interrupts. */
480	disable_intr();
481
482	splhigh();
483
484	/* If rebooting and a dump is requested do it. */
485#if 0
486	if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
487#else
488	if (howto & RB_DUMP)
489#endif
490		dumpsys();
491
492haltsys:
493
494	/* run any shutdown hooks */
495	doshutdownhooks();
496
497	pmf_system_shutdown(boothowto);
498
499	if ((howto & RB_POWERDOWN) == RB_POWERDOWN)
500		prom_halt(0x80);	/* rom monitor RB_PWOFF */
501
502	/* Finally, halt/reboot the system. */
503	printf("%s\n\n", howto & RB_HALT ? "halted." : "rebooting...");
504	prom_halt(howto & RB_HALT);
505	/*NOTREACHED*/
506}
507
508void
509delay(int n)
510{
511
512	DELAY(n);
513}
514
515void
516cpu_intr(int ppl, vaddr_t pc, uint32_t status)
517{
518	curcpu()->ci_data.cpu_nintr++;
519
520	/* device interrupts */
521	(*hardware_intr)(ppl, pc, status);
522}
523