ka88.c revision 1.1 
1/*	$NetBSD: ka88.c,v 1.1 2000/07/26 11:47:17 ragge Exp $	*/
2
3/*
4 * Copyright (c) 2000 Ludd, University of Lule}, Sweden. 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 at Ludd, University of
17 *	Lule}, Sweden and its contributors.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/*
34 * KA88 specific CPU code.
35 */
36/*
37 * TODO:
38 *	- Machine check code
39 */
40
41#include "opt_multiprocessor.h"
42
43#include <sys/param.h>
44#include <sys/time.h>
45#include <sys/kernel.h>
46#include <sys/device.h>
47#include <sys/systm.h>
48#include <sys/conf.h>
49
50#include <machine/cpu.h>
51#include <machine/mtpr.h>
52#include <machine/nexus.h>
53#include <machine/clock.h>
54#include <machine/scb.h>
55#include <machine/bus.h>
56#include <machine/sid.h>
57#include <machine/rpb.h>
58#include <machine/ka88.h>
59
60#include <vax/vax/gencons.h>
61
62#include "ioconf.h"
63#include "locators.h"
64
65static void ka88_memerr(void);
66static void ka88_conf(void);
67static int ka88_mchk(caddr_t);
68static void ka88_steal_pages(void);
69static int ka88_clkread(time_t);
70static void ka88_clkwrite(void);
71static void ka88_badaddr(void);
72#if defined(MULTIPROCESSOR)
73static void ka88_startslave(struct device *, struct cpu_info *);
74static void ka88_txrx(int, char *, int);
75static void ka88_sendstr(int, char *);
76static void ka88_sergeant(int);
77static int rxchar(void);
78static void ka88_putc(int);
79static void ka88_cnintr(void);
80cons_decl(gen);
81#endif
82
83static	long *ka88_mcl;
84static int mastercpu;
85
86struct	cpu_dep ka88_calls = {
87	ka88_steal_pages,
88	ka88_mchk,
89	ka88_memerr,
90	ka88_conf,
91	ka88_clkread,
92	ka88_clkwrite,
93	6,	/* ~VUPS */
94	64,	/* SCB pages */
95	0,
96	0,
97	0,
98	0,
99	0,
100#if defined(MULTIPROCESSOR)
101	ka88_startslave,
102#endif
103	ka88_badaddr,
104};
105
106struct ka88_softc {
107	struct device sc_dev;
108	int sc_slot;
109};
110
111static void
112ka88_conf(void)
113{
114	ka88_mcl = (void *)vax_map_physmem(0x3e000000, 1);
115	printf("Serial number %d, rev %d\n",
116	    mfpr(PR_SID) & 65535, (mfpr(PR_SID) >> 16) & 127);
117}
118
119static int
120ka88_match(struct device *parent, struct cfdata *cf, void *aux)
121{
122	struct nmi_attach_args *na = aux;
123
124	if (cf->cf_loc[NMICF_SLOT] != NMICF_SLOT_DEFAULT &&
125	    cf->cf_loc[NMICF_SLOT] != na->slot)
126		return 0;
127	if (na->slot >= 20)
128		return 1;
129	return 0;
130}
131
132static void
133ka88_attach(struct device *parent, struct device *self, void *aux)
134{
135	struct ka88_softc *sc = (void *)self;
136	struct nmi_attach_args *na = aux;
137	char *ms, *lr;
138
139	if (((ka88_confdata & KA88_LEFTPRIM) && (na->slot == 20)) ||
140	    ((ka88_confdata & KA88_LEFTPRIM) == 0 && (na->slot != 20)))
141		lr = "left";
142	else
143		lr = "right";
144	ms = na->slot == 20 ? "master" : "slave";
145
146	printf(": ka88 (%s) (%s)\n", lr, ms);
147	sc->sc_slot = na->slot;
148	if (na->slot != mastercpu) {
149#if defined(MULTIPROCESSOR)
150		sc->sc_ci = cpu_slavesetup(self);
151		v_putc = ka88_putc;	/* Need special console handling */
152#endif
153		return;
154	}
155	curcpu()->ci_dev = self;
156}
157
158struct cfattach cpu_nmi_ca = {
159	sizeof(struct ka88_softc), ka88_match, ka88_attach
160};
161
162struct mem_nmi_softc {
163	struct device sc_dev;
164	bus_space_tag_t sc_iot;
165	bus_space_handle_t sc_ioh;
166};
167
168static int
169ms88_match(struct device *parent, struct cfdata *cf, void *aux)
170{
171	struct nmi_attach_args *na = aux;
172
173	if (cf->cf_loc[NMICF_SLOT] != NMICF_SLOT_DEFAULT &&
174	    cf->cf_loc[NMICF_SLOT] != na->slot)
175		return 0;
176	if (na->slot != 10)
177		return 0;
178	return 1;
179}
180
181static void
182ms88_attach(struct device *parent, struct device *self, void *aux)
183{
184	printf("\n");
185}
186
187struct cfattach mem_nmi_ca = {
188	sizeof(struct mem_nmi_softc), ms88_match, ms88_attach
189};
190
191static void
192ka88_badaddr(void)
193{
194	volatile int hej;
195	/*
196	 * This is some magic to clear the NMI faults, described
197	 * in section 7.9 in the VAX 8800 System Maintenance Guide.
198	 */
199	hej = ka88_mcl[5];
200	hej = ka88_mcl[0];
201	ka88_mcl[0] = 0x04000000;
202	mtpr(1, 0x88);
203}
204
205static void
206ka88_memerr()
207{
208	printf("ka88_memerr\n");
209}
210
211struct mc88frame {
212	int	mc64_summary;		/* summary parameter */
213	int	mc64_va;		/* va register */
214	int	mc64_vb;		/* memory address */
215	int	mc64_sisr;		/* status word */
216	int	mc64_state;		/* error pc */
217	int	mc64_sc;		/* micro pc */
218	int	mc64_pc;		/* current pc */
219	int	mc64_psl;		/* current psl */
220};
221
222static int
223ka88_mchk(caddr_t cmcf)
224{
225	return (MCHK_PANIC);
226}
227
228#if defined(MULTIPROCESSOR)
229#define RXBUF	80
230static char rxbuf[RXBUF];
231static int got = 0, taken = 0;
232static int expect = 0;
233#endif
234#if 0
235/*
236 * Receive a character from logical console.
237 */
238static void
239rxcdintr(void *arg)
240{
241	int c = mfpr(PR_RXCD);
242
243	if (c == 0)
244		return;
245
246#if defined(MULTIPROCESSOR)
247	if ((c & 0xff) == 0) {
248		if (curcpu()->ci_flags & CI_MASTERCPU)
249			ka88_cnintr();
250		return;
251	}
252
253	if (expect == ((c >> 8) & 0xf))
254		rxbuf[got++] = c & 0xff;
255
256	if (got == RXBUF)
257		got = 0;
258#endif
259}
260#endif
261
262static void
263tocons(int val)
264{
265	int s = splimp();
266
267	while ((mfpr(PR_TXCS) & GC_RDY) == 0)  /* Wait until xmit ready */
268		;
269	mtpr(val, PR_TXDB);		/* xmit character */
270	splx(s);
271}
272
273static int
274fromcons(int func)
275{
276	int ret, s = splimp();
277
278	while (1) {
279		while ((mfpr(PR_RXCS) & GC_DON) == 0)
280			;
281		ret = mfpr(PR_RXDB);
282		if ((ret & 0xf00) == func)
283			break;
284	}
285	splx(s);
286	return ret;
287}
288
289static int
290ka88_clkread(time_t base)
291{
292	union {u_int ret;u_char r[4];} u;
293	int i, s = splimp();
294
295	tocons(KA88_COMM|KA88_TOYREAD);
296	for (i = 0; i < 4; i++) {
297		u.r[i] = fromcons(KA88_TOY) & 255;
298	}
299	splx(s);
300	return u.ret;
301}
302
303static void
304ka88_clkwrite(void)
305{
306	union {u_int ret;u_char r[4];} u;
307	int i, s = splimp();
308
309	u.ret = time.tv_sec - yeartonum(numtoyear(time.tv_sec));
310	tocons(KA88_COMM|KA88_TOYWRITE);
311	for (i = 0; i < 4; i++)
312		tocons(KA88_TOY|u.r[i]);
313	splx(s);
314}
315
316void
317ka88_steal_pages(void)
318{
319	mtpr(1, PR_COR); /* Cache on */
320	strcpy(cpu_model, "VAX 8800");
321	tocons(KA88_COMM|KA88_GETCONF);
322	ka88_confdata = fromcons(KA88_CONFDATA);
323	ka88_confdata = mfpr(PR_RXDB);
324	mastercpu = 20;
325	if (vax_cputype == VAX_TYP_8NN) {
326		if (ka88_confdata & KA88_SMALL) {
327			cpu_model[5] = '5';
328			if (ka88_confdata & KA88_SLOW) {
329				vax_boardtype = VAX_BTYP_8500;
330				cpu_model[6] = '3';
331			} else {
332				vax_boardtype = VAX_BTYP_8550;
333				cpu_model[6] = '5';
334			}
335		} else if (ka88_confdata & KA88_SINGLE) {
336			vax_boardtype = VAX_BTYP_8700;
337			cpu_model[5] = '7';
338		}
339	}
340}
341
342
343#if defined(MULTIPROCESSOR) && 0
344int
345rxchar()
346{
347	int ret;
348
349	if (got == taken)
350		return 0;
351
352	ret = rxbuf[taken++];
353	if (taken == RXBUF)
354		taken = 0;
355	return ret;
356}
357
358static void
359ka88_startslave(struct device *dev, struct cpu_info *ci)
360{
361	struct ka88_softc *sc = (void *)dev;
362	int id = sc->sc_binid;
363	int i;
364
365	expect = sc->sc_binid;
366	/* First empty queue */
367	for (i = 0; i < 10000; i++)
368		if (rxchar())
369			i = 0;
370	ka88_txrx(id, "\020", 0);		/* Send ^P to get attention */
371	ka88_txrx(id, "I\r", 0);			/* Init other end */
372	ka88_txrx(id, "D/I 4 %x\r", ci->ci_istack);	/* Interrupt stack */
373	ka88_txrx(id, "D/I C %x\r", mfpr(PR_SBR));	/* SBR */
374	ka88_txrx(id, "D/I D %x\r", mfpr(PR_SLR));	/* SLR */
375	ka88_txrx(id, "D/I 10 %x\r", (int)ci->ci_pcb);	/* PCB for idle proc */
376	ka88_txrx(id, "D/I 11 %x\r", mfpr(PR_SCBB));	/* SCB */
377	ka88_txrx(id, "D/I 38 %x\r", mfpr(PR_MAPEN)); /* Enable MM */
378	ka88_txrx(id, "S %x\r", (int)&tramp); /* Start! */
379	expect = 0;
380	for (i = 0; i < 10000; i++)
381		if ((volatile)ci->ci_flags & CI_RUNNING)
382			break;
383	if (i == 10000)
384		printf("%s: (ID %d) failed starting??!!??\n",
385		    dev->dv_xname, sc->sc_binid);
386}
387
388void
389ka88_txrx(int id, char *fmt, int arg)
390{
391	char buf[20];
392
393	sprintf(buf, fmt, arg);
394	ka88_sendstr(id, buf);
395	ka88_sergeant(id);
396}
397
398void
399ka88_sendstr(int id, char *buf)
400{
401	register u_int utchr; /* Ends up in R11 with PCC */
402	int ch, i;
403
404	while (*buf) {
405		utchr = *buf | id << 8;
406
407		/*
408		 * It seems like mtpr to TXCD sets the V flag if it fails.
409		 * Cannot check that flag in C...
410		 */
411#ifdef __GNUC__
412		asm("1:;mtpr %0,$92;bvs 1b" :: "g"(utchr));
413#else
414		asm("1:;mtpr r11,$92;bvs 1b");
415#endif
416		buf++;
417		i = 30000;
418		while ((ch = rxchar()) == 0 && --i)
419			;
420		if (ch == 0)
421			continue; /* failed */
422	}
423}
424
425void
426ka88_sergeant(int id)
427{
428	int i, ch, nserg;
429
430	nserg = 0;
431	for (i = 0; i < 30000; i++) {
432		if ((ch = rxchar()) == 0)
433			continue;
434		if (ch == '>')
435			nserg++;
436		else
437			nserg = 0;
438		i = 0;
439		if (nserg == 3)
440			break;
441	}
442	/* What to do now??? */
443}
444
445/*
446 * Write to master console.
447 * Need no locking here; done in the print functions.
448 */
449static volatile int ch = 0;
450
451void
452ka88_putc(int c)
453{
454	if (curcpu()->ci_flags & CI_MASTERCPU) {
455		gencnputc(0, c);
456		return;
457	}
458	ch = c;
459	mtpr(mastercpu << 8, PR_RXCD); /* Send IPI to mastercpu */
460	while (ch != 0)
461		; /* Wait for master to handle */
462}
463
464/*
465 * Got character IPI.
466 */
467void
468ka88_cnintr()
469{
470	if (ch != 0)
471		gencnputc(0, ch);
472	ch = 0; /* Release slavecpu */
473}
474#endif
475