xref: /netbsd-src/sys/arch/vax/vax/ka88.c (revision 404fbe5fb94ca1e054339640cabb2801ce52dd30) 
1 /*	$NetBSD: ka88.c,v 1.13 2008/03/11 05:34:03 matt 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 <sys/cdefs.h>
42 __KERNEL_RCSID(0, "$NetBSD: ka88.c,v 1.13 2008/03/11 05:34:03 matt Exp $");
43 
44 #include "opt_multiprocessor.h"
45 
46 #include <sys/param.h>
47 #include <sys/time.h>
48 #include <sys/kernel.h>
49 #include <sys/device.h>
50 #include <sys/systm.h>
51 #include <sys/conf.h>
52 #include <sys/cpu.h>
53 #include <sys/user.h>
54 #include <sys/malloc.h>
55 #include <sys/lwp.h>
56 
57 #include <machine/mtpr.h>
58 #include <machine/nexus.h>
59 #include <machine/clock.h>
60 #include <machine/scb.h>
61 #include <machine/bus.h>
62 #include <machine/sid.h>
63 #include <machine/pcb.h>
64 #include <machine/rpb.h>
65 #include <machine/ka88.h>
66 
67 #include <dev/cons.h>
68 #include <vax/vax/gencons.h>
69 
70 #include "ioconf.h"
71 #include "locators.h"
72 
73 static void ka88_memerr(void);
74 static void ka88_conf(void);
75 static int ka88_mchk(void *);
76 static void ka88_steal_pages(void);
77 static int ka88_gettime(volatile struct timeval *);
78 static void ka88_settime(volatile struct timeval *);
79 static void ka88_badaddr(void);
80 
81 static long *ka88_mcl;
82 static int mastercpu;
83 
84 static const char * const ka88_devs[] = { "nmi", NULL };
85 
86 const struct cpu_dep ka88_calls = {
87 	.cpu_steal_pages = ka88_steal_pages,
88 	.cpu_mchk	= ka88_mchk,
89 	.cpu_memerr	= ka88_memerr,
90 	.cpu_conf	= ka88_conf,
91 	.cpu_gettime	= ka88_gettime,
92 	.cpu_settime	= ka88_settime,
93 	.cpu_vups	= 6,	/* ~VUPS */
94 	.cpu_scbsz	= 64,	/* SCB pages */
95 	.cpu_devs	= ka88_devs,
96 	.cpu_badaddr	= ka88_badaddr,
97 };
98 
99 #if defined(MULTIPROCESSOR)
100 static void ka88_startslave(struct cpu_info *);
101 static void ka88_txrx(int, const char *, int);
102 static void ka88_sendstr(int, const char *);
103 static void ka88_sergeant(int);
104 static int rxchar(void);
105 static void ka88_putc(int);
106 static void ka88_cnintr(void);
107 cons_decl(gen);
108 
109 const struct cpu_mp_dep ka88_mp_calls = {
110 	.cpu_startslave = ka88_startslave,
111 	.cpu_cnintr = ka88_cnintr,
112 };
113 #endif
114 
115 static void
116 ka88_conf(void)
117 {
118 	ka88_mcl = (void *)vax_map_physmem(0x3e000000, 1);
119 	printf("Serial number %d, rev %d\n",
120 	    mfpr(PR_SID) & 65535, (mfpr(PR_SID) >> 16) & 127);
121 #ifdef MULTIPROCESSOR
122 	mp_dep_call = &ka88_mp_calls;
123 #endif
124 }
125 
126 static int
127 ka88_cpu_match(device_t parent, cfdata_t cf, void *aux)
128 {
129 	struct nmi_attach_args * const na = aux;
130 
131 	if (cf->cf_loc[NMICF_SLOT] != NMICF_SLOT_DEFAULT &&
132 	    cf->cf_loc[NMICF_SLOT] != na->na_slot)
133 		return 0;
134 	if (na->na_slot >= 20)
135 		return 1;
136 	return 0;
137 }
138 
139 static void
140 ka88_cpu_attach(device_t parent, device_t self, void *aux)
141 {
142 	struct cpu_info *ci;
143 	struct nmi_attach_args * const na = aux;
144 	const char *ms, *lr;
145 	const bool master = (na->na_slot == mastercpu);
146 
147 	if (((ka88_confdata & KA88_LEFTPRIM) && master) ||
148 	    ((ka88_confdata & KA88_LEFTPRIM) == 0 && !master))
149 		lr = "left";
150 	else
151 		lr = "right";
152 	ms = (master ? "master" : "slave");
153 
154 	aprint_normal(": KA88 %s %s\n", lr, ms);
155 	if (!master) {
156 #if defined(MULTIPROCESSOR)
157 		v_putc = ka88_putc;	/* Need special console handling */
158 		cpu_slavesetup(self, na->na_slot);
159 #endif
160 		return;
161 	}
162 	ci = curcpu();
163 	self->dv_private = ci;
164 	ci->ci_dev = self;
165 	ci->ci_cpuid = device_unit(self);
166 	ci->ci_slotid = na->na_slot;
167 }
168 
169 CFATTACH_DECL_NEW(cpu_nmi, 0,
170     ka88_cpu_match, ka88_cpu_attach, NULL, NULL);
171 
172 struct mem_nmi_softc {
173 	struct device *sc_dev;
174 	bus_space_tag_t sc_iot;
175 	bus_space_handle_t sc_ioh;
176 };
177 
178 static int
179 ms88_match(device_t parent, cfdata_t cf, void *aux)
180 {
181 	struct nmi_attach_args * const na = aux;
182 
183 	if (cf->cf_loc[NMICF_SLOT] != NMICF_SLOT_DEFAULT &&
184 	    cf->cf_loc[NMICF_SLOT] != na->na_slot)
185 		return 0;
186 	if (na->na_slot != 10)
187 		return 0;
188 	return 1;
189 }
190 
191 static void
192 ms88_attach(device_t parent, device_t self, void *aux)
193 {
194 	struct nmi_attach_args * const na = aux;
195 	struct mem_nmi_softc * const sc = device_private(self);
196 
197 	aprint_normal("\n");
198 
199 	sc->sc_dev = self;
200 	sc->sc_iot = na->na_iot;
201 }
202 
203 CFATTACH_DECL_NEW(mem_nmi, sizeof(struct mem_nmi_softc),
204     ms88_match, ms88_attach, NULL, NULL);
205 
206 static void
207 ka88_badaddr(void)
208 {
209 	volatile int hej;
210 	/*
211 	 * This is some magic to clear the NMI faults, described
212 	 * in section 7.9 in the VAX 8800 System Maintenance Guide.
213 	 */
214 	hej = ka88_mcl[5];
215 	hej = ka88_mcl[0];
216 	ka88_mcl[0] = 0x04000000;
217 	mtpr(1, 0x88);
218 }
219 
220 static void
221 ka88_memerr(void)
222 {
223 	printf("ka88_memerr\n");
224 }
225 
226 struct mc88frame {
227 	int	mc64_summary;		/* summary parameter */
228 	int	mc64_va;		/* va register */
229 	int	mc64_vb;		/* memory address */
230 	int	mc64_sisr;		/* status word */
231 	int	mc64_state;		/* error pc */
232 	int	mc64_sc;		/* micro pc */
233 	int	mc64_pc;		/* current pc */
234 	int	mc64_psl;		/* current psl */
235 };
236 
237 static int
238 ka88_mchk(void *cmcf)
239 {
240 	return (MCHK_PANIC);
241 }
242 
243 #if defined(MULTIPROCESSOR)
244 #define RXBUF	80
245 static char rxbuf[RXBUF];
246 static int got = 0, taken = 0;
247 static int expect = 0;
248 #endif
249 #if 0
250 /*
251  * Receive a character from logical console.
252  */
253 static void
254 rxcdintr(void *arg)
255 {
256 	int c = mfpr(PR_RXCD);
257 
258 	if (c == 0)
259 		return;
260 
261 #if defined(MULTIPROCESSOR)
262 	if ((c & 0xff) == 0) {
263 		if (curcpu()->ci_flags & CI_MASTERCPU)
264 			ka88_cnintr();
265 		return;
266 	}
267 
268 	if (expect == ((c >> 8) & 0xf))
269 		rxbuf[got++] = c & 0xff;
270 
271 	if (got == RXBUF)
272 		got = 0;
273 #endif
274 }
275 #endif
276 
277 static void
278 tocons(int val)
279 {
280 	int s = splhigh();
281 
282 	while ((mfpr(PR_TXCS) & GC_RDY) == 0)  /* Wait until xmit ready */
283 		;
284 	mtpr(val, PR_TXDB);		/* xmit character */
285 	splx(s);
286 }
287 
288 static int
289 fromcons(int func)
290 {
291 	int ret, s = splhigh();
292 
293 	while (1) {
294 		while ((mfpr(PR_RXCS) & GC_DON) == 0)
295 			;
296 		ret = mfpr(PR_RXDB);
297 		if ((ret & 0xf00) == func)
298 			break;
299 	}
300 	splx(s);
301 	return ret;
302 }
303 
304 static int
305 ka88_gettime(volatile struct timeval *tvp)
306 {
307 	union {u_int ret;u_char r[4];} u;
308 	int i, s = splhigh();
309 
310 	tocons(KA88_COMM|KA88_TOYREAD);
311 	for (i = 0; i < 4; i++) {
312 		u.r[i] = fromcons(KA88_TOY) & 255;
313 	}
314 	splx(s);
315 	tvp->tv_sec = u.ret;
316 	return 0;
317 }
318 
319 static void
320 ka88_settime(volatile struct timeval *tvp)
321 {
322 	union {u_int ret;u_char r[4];} u;
323 	int i, s = splhigh();
324 
325 	u.ret = tvp->tv_sec - yeartonum(numtoyear(tvp->tv_sec));
326 	tocons(KA88_COMM|KA88_TOYWRITE);
327 	for (i = 0; i < 4; i++)
328 		tocons(KA88_TOY|u.r[i]);
329 	splx(s);
330 }
331 
332 void
333 ka88_steal_pages(void)
334 {
335 	mtpr(1, PR_COR); /* Cache on */
336 	strcpy(cpu_model, "VAX 8800");
337 	tocons(KA88_COMM|KA88_GETCONF);
338 	ka88_confdata = fromcons(KA88_CONFDATA);
339 	ka88_confdata = mfpr(PR_RXDB);
340 	mastercpu = 20;
341 	if (vax_cputype == VAX_TYP_8NN) {
342 		if (ka88_confdata & KA88_SMALL) {
343 			cpu_model[5] = '5';
344 			if (ka88_confdata & KA88_SLOW) {
345 				vax_boardtype = VAX_BTYP_8500;
346 				cpu_model[6] = '3';
347 			} else {
348 				vax_boardtype = VAX_BTYP_8550;
349 				cpu_model[6] = '5';
350 			}
351 		} else if (ka88_confdata & KA88_SINGLE) {
352 			vax_boardtype = VAX_BTYP_8700;
353 			cpu_model[5] = '7';
354 		}
355 	}
356 }
357 
358 
359 #if defined(MULTIPROCESSOR)
360 int
361 rxchar(void)
362 {
363 	int ret;
364 
365 	if (got == taken)
366 		return 0;
367 
368 	ret = rxbuf[taken++];
369 	if (taken == RXBUF)
370 		taken = 0;
371 	return ret;
372 }
373 
374 static void
375 ka88_startslave(struct cpu_info *ci)
376 {
377 	const int id = ci->ci_slotid;
378 	int i;
379 
380 	expect = id;
381 	/* First empty queue */
382 	for (i = 0; i < 10000; i++)
383 		if (rxchar())
384 			i = 0;
385 	ka88_txrx(id, "\020", 0);		/* Send ^P to get attention */
386 	ka88_txrx(id, "I\r", 0);			/* Init other end */
387 	ka88_txrx(id, "D/I 4 %x\r", ci->ci_istack);	/* Interrupt stack */
388 	ka88_txrx(id, "D/I C %x\r", mfpr(PR_SBR));	/* SBR */
389 	ka88_txrx(id, "D/I D %x\r", mfpr(PR_SLR));	/* SLR */
390 	ka88_txrx(id, "D/I 10 %x\r",			/* PCB for idle proc */
391 	    ci->ci_data.cpu_onproc->l_addr->u_pcb.pcb_paddr);
392 	ka88_txrx(id, "D/I 11 %x\r", mfpr(PR_SCBB));	/* SCB */
393 	ka88_txrx(id, "D/I 38 %x\r", mfpr(PR_MAPEN)); /* Enable MM */
394 	ka88_txrx(id, "S %x\r", (int)&vax_mp_tramp); /* Start! */
395 	expect = 0;
396 	for (i = 0; i < 10000; i++)
397 		if (ci->ci_flags & CI_RUNNING)
398 			break;
399 	if (i == 10000)
400 		aprint_error_dev(ci->ci_dev, "(ID %d) failed starting!!\n", id);
401 }
402 
403 void
404 ka88_txrx(int id, const char *fmt, int arg)
405 {
406 	char buf[20];
407 
408 	sprintf(buf, fmt, arg);
409 	ka88_sendstr(id, buf);
410 	ka88_sergeant(id);
411 }
412 
413 void
414 ka88_sendstr(int id, const char *buf)
415 {
416 	u_int utchr; /* Ends up in R11 with PCC */
417 	int ch, i;
418 
419 	while (*buf) {
420 		utchr = *buf | id << 8;
421 
422 		/*
423 		 * It seems like mtpr to TXCD sets the V flag if it fails.
424 		 * Cannot check that flag in C...
425 		 */
426 #ifdef __GNUC__
427 		__asm("1:;mtpr %0,$92;bvs 1b" :: "g"(utchr));
428 #else
429 		__asm("1:;mtpr r11,$92;bvs 1b");
430 #endif
431 		buf++;
432 		i = 30000;
433 		while ((ch = rxchar()) == 0 && --i)
434 			;
435 		if (ch == 0)
436 			continue; /* failed */
437 	}
438 }
439 
440 void
441 ka88_sergeant(int id)
442 {
443 	int i, ch, nserg;
444 
445 	nserg = 0;
446 	for (i = 0; i < 30000; i++) {
447 		if ((ch = rxchar()) == 0)
448 			continue;
449 		if (ch == '>')
450 			nserg++;
451 		else
452 			nserg = 0;
453 		i = 0;
454 		if (nserg == 3)
455 			break;
456 	}
457 	/* What to do now??? */
458 }
459 
460 /*
461  * Write to master console.
462  * Need no locking here; done in the print functions.
463  */
464 static volatile int ch = 0;
465 
466 void
467 ka88_putc(int c)
468 {
469 	if (curcpu()->ci_flags & CI_MASTERCPU) {
470 		gencnputc(0, c);
471 		return;
472 	}
473 	ch = c;
474 	mtpr(mastercpu << 8, PR_RXCD); /* Send IPI to mastercpu */
475 	while (ch != 0)
476 		; /* Wait for master to handle */
477 }
478 
479 /*
480  * Got character IPI.
481  */
482 void
483 ka88_cnintr(void)
484 {
485 	if (ch != 0)
486 		gencnputc(0, ch);
487 	ch = 0; /* Release slavecpu */
488 }
489 #endif
490