machdep.c revision 94151 
1/*
2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *      This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31/*
32 * Copyright (C) 2001 Benno Rice
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 *    notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 *    notice, this list of conditions and the following disclaimer in the
42 *    documentation and/or other materials provided with the distribution.
43 *
44 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
47 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
49 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
50 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
51 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
52 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
53 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 *	$NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $
55 */
56
57#ifndef lint
58static const char rcsid[] =
59  "$FreeBSD: head/sys/powerpc/aim/machdep.c 94151 2002-04-07 21:01:37Z phk $";
60#endif /* not lint */
61
62#include "opt_ddb.h"
63#include "opt_compat.h"
64#include "opt_msgbuf.h"
65
66#include <sys/param.h>
67#include <sys/systm.h>
68#include <sys/eventhandler.h>
69#include <sys/sysproto.h>
70#include <sys/lock.h>
71#include <sys/mutex.h>
72#include <sys/ktr.h>
73#include <sys/signalvar.h>
74#include <sys/kernel.h>
75#include <sys/proc.h>
76#include <sys/malloc.h>
77#include <sys/reboot.h>
78#include <sys/bio.h>
79#include <sys/buf.h>
80#include <sys/bus.h>
81#include <sys/mbuf.h>
82#include <sys/vmmeter.h>
83#include <sys/msgbuf.h>
84#include <sys/exec.h>
85#include <sys/sysctl.h>
86#include <sys/uio.h>
87#include <sys/linker.h>
88#include <sys/cons.h>
89#include <sys/ucontext.h>
90#include <net/netisr.h>
91#include <vm/vm.h>
92#include <vm/vm_kern.h>
93#include <vm/vm_page.h>
94#include <vm/vm_map.h>
95#include <vm/vm_extern.h>
96#include <vm/vm_object.h>
97#include <vm/vm_pager.h>
98#include <sys/user.h>
99#include <sys/ptrace.h>
100#include <machine/bat.h>
101#include <machine/clock.h>
102#include <machine/md_var.h>
103#include <machine/reg.h>
104#include <machine/fpu.h>
105#include <machine/vmparam.h>
106#include <machine/elf.h>
107#include <machine/trap.h>
108#include <machine/powerpc.h>
109#include <dev/ofw/openfirm.h>
110#include <ddb/ddb.h>
111#include <sys/vnode.h>
112#include <machine/sigframe.h>
113
114int physmem = 0;
115int cold = 1;
116
117char		pcpu0[PAGE_SIZE];
118char		uarea0[UAREA_PAGES * PAGE_SIZE];
119struct		trapframe frame0;
120
121vm_offset_t	kstack0;
122vm_offset_t	kstack0_phys;
123
124char		machine[] = "powerpc";
125SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
126
127static char	model[128];
128SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, "");
129
130char		bootpath[256];
131
132#ifdef DDB
133/* start and end of kernel symbol table */
134void		*ksym_start, *ksym_end;
135#endif /* DDB */
136
137static void	cpu_startup(void *);
138SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL)
139
140void		powerpc_init(u_int, u_int, u_int, char *);
141
142int		save_ofw_mapping(void);
143int		restore_ofw_mapping(void);
144
145void		install_extint(void (*)(void));
146
147#ifdef COMPAT_43
148void		osendsig(sig_t, int, sigset_t *, u_long);
149#endif
150
151static int
152sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
153{
154	int error = sysctl_handle_int(oidp, 0, ctob(physmem), req);
155	return (error);
156}
157
158SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_INT|CTLFLAG_RD,
159	0, 0, sysctl_hw_physmem, "IU", "");
160
161int		Maxmem = 0;
162
163static int	chosen;
164
165struct pmap	ofw_pmap;
166extern int	ofmsr;
167
168struct bat	battable[16];
169
170static void	identifycpu(void);
171
172struct kva_md_info kmi;
173
174static void
175powerpc_ofw_shutdown(void *junk, int howto)
176{
177	if (howto & RB_HALT) {
178		OF_exit();
179	}
180}
181
182static void
183cpu_startup(void *dummy)
184{
185
186	/*
187	 * Good {morning,afternoon,evening,night}.
188	 */
189	identifycpu();
190
191	/* startrtclock(); */
192#ifdef PERFMON
193	perfmon_init();
194#endif
195	printf("real memory  = %ld (%ldK bytes)\n", ptoa(Maxmem),
196	    ptoa(Maxmem) / 1024);
197
198	/*
199	 * Display any holes after the first chunk of extended memory.
200	 */
201	if (bootverbose) {
202		int indx;
203
204		printf("Physical memory chunk(s):\n");
205		for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
206			int size1 = phys_avail[indx + 1] - phys_avail[indx];
207
208			printf("0x%08x - 0x%08x, %d bytes (%d pages)\n",
209			    phys_avail[indx], phys_avail[indx + 1] - 1, size1,
210			    size1 / PAGE_SIZE);
211		}
212	}
213
214	vm_ksubmap_init(&kmi);
215
216#if defined(USERCONFIG)
217#if defined(USERCONFIG_BOOT)
218	if (1)
219#else
220        if (boothowto & RB_CONFIG)
221#endif
222	{
223		userconfig();
224		cninit();	/* the preferred console may have changed */
225	}
226#endif
227
228	printf("avail memory = %ld (%ldK bytes)\n", ptoa(cnt.v_free_count),
229	    ptoa(cnt.v_free_count) / 1024);
230
231	/*
232	 * Set up buffers, so they can be used to read disk labels.
233	 */
234	bufinit();
235	vm_pager_bufferinit();
236	EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0,
237	    SHUTDOWN_PRI_LAST);
238
239#ifdef SMP
240	/*
241	 * OK, enough kmem_alloc/malloc state should be up, lets get on with it!
242	 */
243	mp_start();			/* fire up the secondaries */
244	mp_announce();
245#endif  /* SMP */
246}
247
248void
249identifycpu()
250{
251	unsigned int pvr, version, revision;
252
253	/*
254	 * Find cpu type (Do it by OpenFirmware?)
255	 */
256	__asm ("mfpvr %0" : "=r"(pvr));
257	version = pvr >> 16;
258	revision = pvr & 0xffff;
259	switch (version) {
260	case 0x0000:
261		sprintf(model, "Simulator (psim)");
262		break;
263	case 0x0001:
264		sprintf(model, "601");
265		break;
266	case 0x0003:
267		sprintf(model, "603 (Wart)");
268		break;
269	case 0x0004:
270		sprintf(model, "604 (Zephyr)");
271		break;
272	case 0x0005:
273		sprintf(model, "602 (Galahad)");
274		break;
275	case 0x0006:
276		sprintf(model, "603e (Stretch)");
277		break;
278	case 0x0007:
279		if ((revision && 0xf000) == 0x0000)
280			sprintf(model, "603ev (Valiant)");
281		else
282			sprintf(model, "603r (Goldeneye)");
283		break;
284	case 0x0008:
285		if ((revision && 0xf000) == 0x0000)
286			sprintf(model, "G3 / 750 (Arthur)");
287		else
288			sprintf(model, "G3 / 755 (Goldfinger)");
289		break;
290	case 0x0009:
291		if ((revision && 0xf000) == 0x0000)
292			sprintf(model, "604e (Sirocco)");
293		else
294			sprintf(model, "604r (Mach V)");
295		break;
296	case 0x000a:
297		sprintf(model, "604r (Mach V)");
298		break;
299	case 0x000c:
300		sprintf(model, "G4 / 7400 (Max)");
301		break;
302	case 0x0014:
303		sprintf(model, "620 (Red October)");
304		break;
305	case 0x0081:
306		sprintf(model, "8240 (Kahlua)");
307		break;
308	case 0x8000:
309		sprintf(model, "G4 / 7450 (V'ger)");
310		break;
311	case 0x800c:
312		sprintf(model, "G4 / 7410 (Nitro)");
313		break;
314	case 0x8081:
315		sprintf(model, "8245 (Kahlua II)");
316		break;
317	default:
318		sprintf(model, "Version %x", version);
319		break;
320	}
321	sprintf(model + strlen(model), " (Revision %x)", revision);
322	printf("CPU: PowerPC %s\n", model);
323}
324
325extern char	kernel_text[], _end[];
326
327extern void	*trapcode, *trapsize;
328extern void	*alitrap, *alisize;
329extern void	*dsitrap, *dsisize;
330extern void	*isitrap, *isisize;
331extern void	*decrint, *decrsize;
332extern void	*tlbimiss, *tlbimsize;
333extern void	*tlbdlmiss, *tlbdlmsize;
334extern void	*tlbdsmiss, *tlbdsmsize;
335
336#if 0 /* XXX: interrupt handler.  We'll get to this later */
337extern void	ext_intr(void);
338#endif
339
340#ifdef DDB
341extern		ddblow, ddbsize;
342#endif
343#ifdef IPKDB
344extern		ipkdblow, ipkdbsize;
345#endif
346
347void
348powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, char *args)
349{
350	struct		pcpu *pc;
351	vm_offset_t	off;
352
353	/*
354	 * Initialize the console before printing anything.
355	 */
356	cninit();
357
358	/*
359	 * XXX: Initialize the interrupt tables.
360	 */
361	bcopy(&decrint, (void *)EXC_DECR, (size_t)&decrsize);
362	bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize);
363	bcopy(&isitrap, (void *)EXC_ISI, (size_t)&isisize);
364
365	/*
366	 * Start initializing proc0 and thread0.
367	 */
368	proc_linkup(&proc0, &proc0.p_ksegrp, &proc0.p_kse, &thread0);
369	proc0.p_uarea = (struct user *)uarea0;
370	proc0.p_stats = &proc0.p_uarea->u_stats;
371	thread0.td_frame = &frame0;
372
373	/*
374	 * Set up per-cpu data.
375	 */
376	pc = (struct pcpu *)(pcpu0 + PAGE_SIZE) - 1;
377	pcpu_init(pc, 0, sizeof(struct pcpu));
378	pc->pc_curthread = &thread0;
379	pc->pc_curpcb = thread0.td_pcb;
380	pc->pc_cpuid = 0;
381	/* pc->pc_mid = mid; */
382
383	__asm __volatile("mtsprg 0, %0" :: "r"(pc));
384
385	mutex_init();
386
387	/*
388	 * Initialise virtual memory.
389	 */
390	ofmsr |= PSL_IR | PSL_DR;
391	pmap_bootstrap(startkernel, endkernel);
392
393	/*
394	 * Initialize tunables.
395	 */
396	init_param1();
397	init_param2(physmem);
398
399	/*
400	 * Finish setting up thread0.
401	 */
402	thread0.td_kstack = kstack0;
403	thread0.td_pcb = (struct pcb *)
404	    (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
405
406	/*
407	 * Map and initialise the message buffer.
408	 */
409	for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
410		pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off);
411	msgbufinit(msgbufp, MSGBUF_SIZE);
412}
413
414#if 0 /* XXX: Old powerpc_init */
415void
416powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, char *args)
417{
418	unsigned int		exc, scratch;
419	struct mem_region	*allmem, *availmem, *mp;
420	struct pcpu	*pcpup;
421
422	/*
423	 * Set up BAT0 to only map the lowest 256 MB area
424	 */
425	battable[0].batl = BATL(0x00000000, BAT_M, BAT_PP_RW);
426	battable[0].batu = BATU(0x00000000, BAT_BL_256M, BAT_Vs);
427
428	/*
429	 * Map PCI memory space.
430	 */
431	battable[0x8].batl = BATL(0x80000000, BAT_I, BAT_PP_RW);
432	battable[0x8].batu = BATU(0x80000000, BAT_BL_256M, BAT_Vs);
433
434	battable[0x9].batl = BATL(0x90000000, BAT_I, BAT_PP_RW);
435	battable[0x9].batu = BATU(0x90000000, BAT_BL_256M, BAT_Vs);
436
437	battable[0xa].batl = BATL(0xa0000000, BAT_I, BAT_PP_RW);
438	battable[0xa].batu = BATU(0xa0000000, BAT_BL_256M, BAT_Vs);
439
440	/*
441	 * Map obio devices.
442	 */
443	battable[0xf].batl = BATL(0xf0000000, BAT_I, BAT_PP_RW);
444	battable[0xf].batu = BATU(0xf0000000, BAT_BL_256M, BAT_Vs);
445
446	/*
447	 * Now setup fixed bat registers
448	 *
449	 * Note that we still run in real mode, and the BAT
450	 * registers were cleared above.
451	 */
452	/* BAT0 used for initial 256 MB segment */
453	__asm __volatile ("mtibatl 0,%0; mtibatu 0,%1;"
454		          "mtdbatl 0,%0; mtdbatu 0,%1;"
455		          :: "r"(battable[0].batl), "r"(battable[0].batu));
456	/*
457	 * Set up battable to map all RAM regions.
458	 * This is here because mem_regions() call needs bat0 set up.
459	 */
460	mem_regions(&allmem, &availmem);
461
462	/* Calculate the physical memory in the machine */
463	for (mp = allmem; mp->size; mp++)
464		physmem += btoc(mp->size);
465
466	for (mp = allmem; mp->size; mp++) {
467		vm_offset_t	pa = mp->start & 0xf0000000;
468		vm_offset_t	end = mp->start + mp->size;
469
470		do {
471			u_int n = pa >> 28;
472
473			battable[n].batl = BATL(pa, BAT_M, BAT_PP_RW);
474			battable[n].batu = BATU(pa, BAT_BL_256M, BAT_Vs);
475			pa += 0x10000000;
476		} while (pa < end);
477	}
478
479	chosen = OF_finddevice("/chosen");
480	save_ofw_mapping();
481
482	pmap_setavailmem(startkernel, endkernel);
483
484	proc_linkup(&proc0, &proc0.p_ksegrp, &proc0.p_kse, &thread0);
485
486	proc0uarea = (struct user *)pmap_steal_memory(UAREA_PAGES * PAGE_SIZE);
487	proc0kstack = pmap_steal_memory(KSTACK_PAGES * PAGE_SIZE);
488	proc0.p_uarea = proc0uarea;
489	thread0.td_kstack = proc0kstack;
490	thread0.td_pcb = (struct pcb *)
491	    (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
492
493	pcpup = pmap_steal_memory(round_page(sizeof(struct pcpu)));
494
495	/*
496	 * XXX: Pass 0 as CPU id.  This is bad.  We need to work out
497	 * XXX: which CPU we are somehow.
498	 */
499	pcpu_init(pcpup, 0, sizeof(struct pcpu));
500	__asm ("mtsprg 0, %0" :: "r"(pcpup));
501
502	/* Init basic tunables, hz etc */
503	init_param1();
504	init_param2(physmem);
505
506	PCPU_SET(curthread, &thread0);
507
508/* XXX: NetBSDism I _think_.  Not sure yet. */
509#if 0
510	curpm = PCPU_GET(curpcb)->pcb_pmreal = PCPU_GET(curpcb)->pcb_pm = kernel_pmap;
511#endif
512
513	mutex_init();
514
515	/*
516	 * Initialise console.
517	 */
518	cninit();
519
520#ifdef	__notyet__		/* Needs some rethinking regarding real/virtual OFW */
521	OF_set_callback(callback);
522#endif
523
524	/*
525	 * Set up trap vectors
526	 */
527	for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) {
528		switch (exc) {
529		default:
530			bcopy(&trapcode, (void *)exc, (size_t)&trapsize);
531			break;
532		case EXC_DECR:
533			bcopy(&decrint, (void *)EXC_DECR, (size_t)&decrsize);
534			break;
535#if 0 /* XXX: Not enabling these traps yet. */
536		case EXC_EXI:
537			/*
538			 * This one is (potentially) installed during autoconf
539			 */
540			break;
541		case EXC_ALI:
542			bcopy(&alitrap, (void *)EXC_ALI, (size_t)&alisize);
543			break;
544		case EXC_DSI:
545			bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize);
546			break;
547		case EXC_ISI:
548			bcopy(&isitrap, (void *)EXC_ISI, (size_t)&isisize);
549			break;
550		case EXC_IMISS:
551			bcopy(&tlbimiss, (void *)EXC_IMISS, (size_t)&tlbimsize);
552			break;
553		case EXC_DLMISS:
554			bcopy(&tlbdlmiss, (void *)EXC_DLMISS, (size_t)&tlbdlmsize);
555			break;
556		case EXC_DSMISS:
557			bcopy(&tlbdsmiss, (void *)EXC_DSMISS, (size_t)&tlbdsmsize);
558			break;
559#if defined(DDB) || defined(IPKDB)
560		case EXC_TRC:
561		case EXC_PGM:
562		case EXC_BPT:
563#if defined(DDB)
564			bcopy(&ddblow, (void *)exc, (size_t)&ddbsize);
565#else
566			bcopy(&ipkdblow, (void *)exc, (size_t)&ipkdbsize);
567#endif
568			break;
569#endif /* DDB || IPKDB */
570#endif
571		}
572	}
573
574#if 0 /* XXX: coming soon... */
575	/*
576	 * external interrupt handler install
577	 */
578	install_extint(ext_intr);
579#endif
580
581	__syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100);
582
583	/*
584	 * Now enable translation (and machine checks/recoverable interrupts).
585	 */
586	__asm ("mfmsr %0" : "=r"(scratch));
587	scratch |= PSL_IR | PSL_DR | PSL_ME | PSL_RI;
588	__asm ("mtmsr %0" :: "r"(scratch));
589
590	ofmsr &= ~PSL_IP;
591
592	/*
593	 * Parse arg string.
594	 */
595#ifdef DDB
596	bcopy(args + strlen(args) + 1, &startsym, sizeof(startsym));
597	bcopy(args + strlen(args) + 5, &endsym, sizeof(endsym));
598	if (startsym == NULL || endsym == NULL)
599		startsym = endsym = NULL;
600#endif
601
602	strcpy(bootpath, args);
603	args = bootpath;
604	while (*++args && *args != ' ');
605	if (*args) {
606		*args++ = 0;
607		while (*args) {
608			switch (*args++) {
609			case 'a':
610				boothowto |= RB_ASKNAME;
611				break;
612			case 's':
613				boothowto |= RB_SINGLE;
614				break;
615			case 'd':
616				boothowto |= RB_KDB;
617				break;
618			case 'v':
619				boothowto |= RB_VERBOSE;
620				break;
621			}
622		}
623	}
624
625#ifdef DDB
626	ddb_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym);
627#endif
628#ifdef IPKDB
629	/*
630	 * Now trap to IPKDB
631	 */
632	ipkdb_init();
633	if (boothowto & RB_KDB)
634		ipkdb_connect(0);
635#endif
636
637	/*
638	 * Set the page size.
639	 */
640#if 0
641	vm_set_page_size();
642#endif
643
644	/*
645	 * Initialize pmap module.
646	 */
647	pmap_bootstrap();
648
649	restore_ofw_mapping();
650
651	PCPU_GET(next_asn) = 1;	/* 0 used for proc0 pmap */
652
653	/* setup proc 0's pcb */
654	thread0.td_pcb->pcb_flags = 0; /* XXXKSE */
655	thread0.td_frame = &proc0_tf;
656}
657#endif
658
659static int N_mapping;
660static struct {
661	vm_offset_t	va;
662	int		len;
663	vm_offset_t	pa;
664	int		mode;
665} ofw_mapping[256];
666
667int
668save_ofw_mapping()
669{
670	int	mmui, mmu;
671
672	OF_getprop(chosen, "mmu", &mmui, 4);
673	mmu = OF_instance_to_package(mmui);
674
675	bzero(ofw_mapping, sizeof(ofw_mapping));
676
677	N_mapping =
678	    OF_getprop(mmu, "translations", ofw_mapping, sizeof(ofw_mapping));
679	N_mapping /= sizeof(ofw_mapping[0]);
680
681	return 0;
682}
683
684int
685restore_ofw_mapping()
686{
687	int		i;
688	struct vm_page	pg;
689
690	pmap_pinit(&ofw_pmap);
691
692	ofw_pmap.pm_sr[KERNEL_SR] = KERNEL_SEGMENT;
693
694	for (i = 0; i < N_mapping; i++) {
695		vm_offset_t	pa = ofw_mapping[i].pa;
696		vm_offset_t	va = ofw_mapping[i].va;
697		int		size = ofw_mapping[i].len;
698
699		if (va < 0x80000000)			/* XXX */
700			continue;
701
702		while (size > 0) {
703			pg.phys_addr = pa;
704			pmap_enter(&ofw_pmap, va, &pg, VM_PROT_ALL,
705			    VM_PROT_ALL);
706			pa += PAGE_SIZE;
707			va += PAGE_SIZE;
708			size -= PAGE_SIZE;
709		}
710	}
711
712	return 0;
713}
714
715void
716bzero(void *buf, size_t len)
717{
718	caddr_t	p;
719
720	p = buf;
721
722	while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
723		*p++ = 0;
724		len--;
725	}
726
727	while (len >= sizeof(u_long) * 8) {
728		*(u_long*) p = 0;
729		*((u_long*) p + 1) = 0;
730		*((u_long*) p + 2) = 0;
731		*((u_long*) p + 3) = 0;
732		len -= sizeof(u_long) * 8;
733		*((u_long*) p + 4) = 0;
734		*((u_long*) p + 5) = 0;
735		*((u_long*) p + 6) = 0;
736		*((u_long*) p + 7) = 0;
737		p += sizeof(u_long) * 8;
738	}
739
740	while (len >= sizeof(u_long)) {
741		*(u_long*) p = 0;
742		len -= sizeof(u_long);
743		p += sizeof(u_long);
744	}
745
746	while (len) {
747		*p++ = 0;
748		len--;
749	}
750}
751
752#if 0
753void
754delay(unsigned n)
755{
756	u_long tb;
757
758	do {
759		__asm __volatile("mftb %0" : "=r" (tb));
760	} while (n > (int)(tb & 0xffffffff));
761}
762#endif
763
764#ifdef COMPAT_43
765void
766osendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
767{
768
769	/* XXX: To be done */
770	return;
771}
772#endif
773
774void
775sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
776{
777
778	/* XXX: To be done */
779	return;
780}
781
782/*
783 * Stub to satisfy the reference to osigreturn in the syscall table.  This
784 * is needed even for newer arches that don't support old signals because
785 * the syscall table is machine-independent.
786 */
787int
788osigreturn(struct thread *td, struct osigreturn_args *uap)
789{
790
791	return (nosys(td, (struct nosys_args *)uap));
792}
793
794int
795sigreturn(struct thread *td, struct sigreturn_args *uap)
796{
797
798	/* XXX: To be done */
799	return(ENOSYS);
800}
801
802void
803cpu_boot(int howto)
804{
805}
806
807/*
808 * Shutdown the CPU as much as possible.
809 */
810void
811cpu_halt(void)
812{
813
814	OF_exit();
815}
816
817/*
818 * Set set up registers on exec.
819 */
820void
821setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
822{
823	struct trapframe	*tf;
824	struct ps_strings	arginfo;
825
826	tf = trapframe(td);
827	bzero(tf, sizeof *tf);
828	tf->fixreg[1] = -roundup(-stack + 8, 16);
829
830	/*
831	 * XXX Machine-independent code has already copied arguments and
832	 * XXX environment to userland.  Get them back here.
833	 */
834	(void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo));
835
836	/*
837	 * Set up arguments for _start():
838	 *	_start(argc, argv, envp, obj, cleanup, ps_strings);
839	 *
840	 * Notes:
841	 *	- obj and cleanup are the auxilliary and termination
842	 *	  vectors.  They are fixed up by ld.elf_so.
843	 *	- ps_strings is a NetBSD extention, and will be
844	 * 	  ignored by executables which are strictly
845	 *	  compliant with the SVR4 ABI.
846	 *
847	 * XXX We have to set both regs and retval here due to different
848	 * XXX calling convention in trap.c and init_main.c.
849	 */
850	tf->fixreg[3] = arginfo.ps_nargvstr;
851	tf->fixreg[4] = (register_t)arginfo.ps_argvstr;
852	tf->fixreg[5] = (register_t)arginfo.ps_envstr;
853	tf->fixreg[6] = 0;			/* auxillary vector */
854	tf->fixreg[7] = 0;			/* termination vector */
855	tf->fixreg[8] = (register_t)PS_STRINGS;	/* NetBSD extension */
856
857	tf->srr0 = entry;
858	tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT;
859	td->td_pcb->pcb_flags = 0;
860}
861
862extern void	*extint, *extsize;
863extern u_long	extint_call;
864
865void
866install_extint(void (*handler)(void))
867{
868	u_long	offset;
869	int	omsr, msr;
870
871	offset = (u_long)handler - (u_long)&extint_call;
872
873#ifdef	DIAGNOSTIC
874	if (offset > 0x1ffffff)
875		panic("install_extint: too far away");
876#endif
877
878	msr = mfmsr();
879	mtmsr(msr & ~(PSL_EE|PSL_RI));
880
881	extint_call = (extint_call & 0xfc000003) | offset;
882	bcopy(&extint, (void *)EXC_EXI, (size_t)&extsize);
883	__syncicache((void *)&extint_call, sizeof extint_call);
884	__syncicache((void *)EXC_EXI, (int)&extsize);
885
886	mtmsr(msr);
887}
888
889#if !defined(DDB)
890void
891Debugger(const char *msg)
892{
893
894	printf("Debugger(\"%s\") called.\n", msg);
895}
896#endif /* !defined(DDB) */
897
898/* XXX: dummy {fill,set}_[fp]regs */
899int
900fill_regs(struct thread *td, struct reg *regs)
901{
902
903	return (ENOSYS);
904}
905
906int
907fill_dbregs(struct thread *td, struct dbreg *dbregs)
908{
909
910	return (ENOSYS);
911}
912
913int
914fill_fpregs(struct thread *td, struct fpreg *fpregs)
915{
916
917	return (ENOSYS);
918}
919
920int
921set_regs(struct thread *td, struct reg *regs)
922{
923
924	return (ENOSYS);
925}
926
927int
928set_dbregs(struct thread *td, struct dbreg *dbregs)
929{
930
931	return (ENOSYS);
932}
933
934int
935set_fpregs(struct thread *td, struct fpreg *fpregs)
936{
937
938	return (ENOSYS);
939}
940
941int
942ptrace_set_pc(struct thread *td, unsigned long addr)
943{
944
945	/* XXX: coming soon... */
946	return (ENOSYS);
947}
948
949int
950ptrace_single_step(struct thread *td)
951{
952
953	/* XXX: coming soon... */
954	return (ENOSYS);
955}
956
957int
958ptrace_clear_single_step(struct thread *td)
959{
960
961	/* XXX: coming soon... */
962	return (ENOSYS);
963}
964
965/*
966 * Initialise a struct pcpu.
967 */
968void
969cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
970{
971
972	pcpu->pc_current_asngen = 1;
973}
974
975void
976enable_fpu(struct pcb *pcb)
977{
978	int msr, scratch;
979
980	if (!(pcb->pcb_flags & PCB_FPU)) {
981		bzero(&pcb->pcb_fpu, sizeof pcb->pcb_fpu);
982		pcb->pcb_flags |= PCB_FPU;
983	}
984	__asm volatile ("mfmsr %0; ori %1,%0,%2; mtmsr %1; isync"
985		      : "=r"(msr), "=r"(scratch) : "K"(PSL_FP));
986	__asm volatile ("lfd 0,0(%0); mtfsf 0xff,0" :: "b"(&pcb->pcb_fpu.fpscr));
987	__asm ("lfd 0,0(%0);"
988	     "lfd 1,8(%0);"
989	     "lfd 2,16(%0);"
990	     "lfd 3,24(%0);"
991	     "lfd 4,32(%0);"
992	     "lfd 5,40(%0);"
993	     "lfd 6,48(%0);"
994	     "lfd 7,56(%0);"
995	     "lfd 8,64(%0);"
996	     "lfd 9,72(%0);"
997	     "lfd 10,80(%0);"
998	     "lfd 11,88(%0);"
999	     "lfd 12,96(%0);"
1000	     "lfd 13,104(%0);"
1001	     "lfd 14,112(%0);"
1002	     "lfd 15,120(%0);"
1003	     "lfd 16,128(%0);"
1004	     "lfd 17,136(%0);"
1005	     "lfd 18,144(%0);"
1006	     "lfd 19,152(%0);"
1007	     "lfd 20,160(%0);"
1008	     "lfd 21,168(%0);"
1009	     "lfd 22,176(%0);"
1010	     "lfd 23,184(%0);"
1011	     "lfd 24,192(%0);"
1012	     "lfd 25,200(%0);"
1013	     "lfd 26,208(%0);"
1014	     "lfd 27,216(%0);"
1015	     "lfd 28,224(%0);"
1016	     "lfd 29,232(%0);"
1017	     "lfd 30,240(%0);"
1018	     "lfd 31,248(%0)" :: "b"(&pcb->pcb_fpu.fpr[0]));
1019	__asm volatile ("mtmsr %0; isync" :: "r"(msr));
1020}
1021
1022void
1023save_fpu(struct pcb *pcb)
1024{
1025	int msr, scratch;
1026
1027	__asm volatile ("mfmsr %0; ori %1,%0,%2; mtmsr %1; isync"
1028		      : "=r"(msr), "=r"(scratch) : "K"(PSL_FP));
1029	__asm ("stfd 0,0(%0);"
1030	     "stfd 1,8(%0);"
1031	     "stfd 2,16(%0);"
1032	     "stfd 3,24(%0);"
1033	     "stfd 4,32(%0);"
1034	     "stfd 5,40(%0);"
1035	     "stfd 6,48(%0);"
1036	     "stfd 7,56(%0);"
1037	     "stfd 8,64(%0);"
1038	     "stfd 9,72(%0);"
1039	     "stfd 10,80(%0);"
1040	     "stfd 11,88(%0);"
1041	     "stfd 12,96(%0);"
1042	     "stfd 13,104(%0);"
1043	     "stfd 14,112(%0);"
1044	     "stfd 15,120(%0);"
1045	     "stfd 16,128(%0);"
1046	     "stfd 17,136(%0);"
1047	     "stfd 18,144(%0);"
1048	     "stfd 19,152(%0);"
1049	     "stfd 20,160(%0);"
1050	     "stfd 21,168(%0);"
1051	     "stfd 22,176(%0);"
1052	     "stfd 23,184(%0);"
1053	     "stfd 24,192(%0);"
1054	     "stfd 25,200(%0);"
1055	     "stfd 26,208(%0);"
1056	     "stfd 27,216(%0);"
1057	     "stfd 28,224(%0);"
1058	     "stfd 29,232(%0);"
1059	     "stfd 30,240(%0);"
1060	     "stfd 31,248(%0)" :: "b"(&pcb->pcb_fpu.fpr[0]));
1061	__asm volatile ("mffs 0; stfd 0,0(%0)" :: "b"(&pcb->pcb_fpu.fpscr));
1062	__asm volatile ("mtmsr %0; isync" :: "r"(msr));
1063}
1064