1/*	$NetBSD: promcall.c,v 1.20 2011/02/20 07:50:25 matt 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 and Ralph Campbell.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: Utah Hdr: cons.c 1.1 90/07/09
37 *
38 *	@(#)cons.c	8.2 (Berkeley) 1/11/94
39 */
40
41#include <sys/cdefs.h>
42__KERNEL_RCSID(0, "$NetBSD: promcall.c,v 1.20 2011/02/20 07:50:25 matt Exp $");
43
44#include <sys/param.h>
45#include <sys/device.h>
46#include <sys/reboot.h>
47#include <sys/systm.h>
48
49#include <dev/cons.h>
50
51#include <pmax/dec_prom.h>
52#include <pmax/pmax/pmaxtype.h>
53#include <pmax/pmax/machdep.h>
54
55static int  romgetc(dev_t);
56static void romputc(dev_t, int);
57
58#define DEFAULT_SCSIID	7    /* XXX - this should really live somewhere else */
59
60/*
61 * Default consdev, for errors or warnings before
62 * consinit runs: use the PROM.
63 */
64struct consdev promcd = {
65	NULL,		/* probe */
66	NULL,		/* init */
67	romgetc,	/* getc */
68	romputc,	/* putc */
69	nullcnpollc,	/* pollc */
70	NULL,		/* bell */
71	makedev(0, 0),
72	CN_DEAD,
73};
74
75/*
76 * Get character from PROM console.
77 */
78static int
79romgetc(dev_t dev)
80{
81	int chr, s;
82
83	s  = splhigh();
84	chr = promcall(callv->_getchar);
85	splx(s);
86	return chr;
87}
88
89/*
90 * Print a character on PROM console.
91 */
92static void
93romputc(dev_t dev, int c)
94{
95	int s;
96
97	s = splhigh();
98	promcall(callv->_printf, "%c", c);
99	splx(s);
100}
101
102/*
103 * Call back to the PROM to find out what devices it is using
104 * as console.
105 * Encoding is idiosyncratic; see DECstation Owners Guide.
106 */
107void
108prom_findcons(int *kbdslot, int *crtslot, int *prom_using_screen)
109{
110	char *oscon = 0;	/* PROM osconsole string */
111
112	/*
113	 * Get and parse the "osconsole" environment variable.
114	 */
115	*crtslot = *kbdslot = -1;
116	oscon = prom_getenv("osconsole");
117	if (oscon && *oscon >= '0' && *oscon <= '9') {
118		*kbdslot = *oscon - '0';
119		*prom_using_screen = 0;
120		while (*++oscon) {
121			if (*oscon == ',')
122				*prom_using_screen = 1;
123			else if (*prom_using_screen &&
124			    *oscon >= '0' && *oscon <= '9') {
125				*crtslot = *kbdslot;
126				*kbdslot = *oscon - '0';
127				break;
128			}
129		}
130	}
131
132	/*
133	 * compensate for discrepancies in PROM syntax.
134	 * XXX use cons_init vector instead?
135	*/
136	if (systype == DS_PMAX && *kbdslot == 1)
137		*prom_using_screen = 1;
138
139	/*
140	 * On a 5000/200, The boot program uses the old, pre-rex PROM
141	 * entrypoints, so the ROM sets osconsole to '1' like the PMAX.
142	 * our parser loses. fix it by hand.
143	 */
144	if (systype == DS_3MAX && *crtslot == -1 && *kbdslot == 1) {
145		/* Try to use pmax onboard framebuffer */
146		*prom_using_screen = 1;
147		*crtslot = 0;
148		*kbdslot = 7;
149	}
150
151}
152
153/*
154 * Get a prom environment variable.
155 */
156char *
157prom_getenv(const char *name)
158{
159
160	return (void *)promcall(callv->_getenv, name);
161}
162
163/*
164 * Get 32bit system type of Digital hardware.
165 *	cputype,		uint8_t [3]
166 *	systype,		uint8_t [2]
167 *	firmware revision,	uint8_t [1]
168 *	hardware revision.	uint8_t [0]
169 */
170int
171prom_systype(void)
172{
173#ifndef _LP64
174	char *cp;
175
176	if (callv != &callvec)
177#endif
178		return promcall(callv->_getsysid);
179#ifndef _LP64
180	cp = prom_getenv("systype");
181	return (cp != NULL) ? strtoul(cp, NULL, 0) : 0;
182#endif
183}
184
185/*
186 * Reset machine by haltbutton.
187 */
188void
189prom_haltbutton(void)
190{
191
192	promcall(callv->_halt, (int *)0, 0);
193}
194
195/*
196 * Halt/reboot machine.
197 */
198void __dead
199prom_halt(int howto, char *bootstr)
200{
201
202	if (callv != &callvec)
203		promcall(callv->_rex, (howto & RB_HALT) ? 'h' : 'b');
204	else {
205		void __dead (*f)(void);
206
207		f = (howto & RB_HALT)
208			? (void *)DEC_PROM_REINIT
209			: (void *)DEC_PROM_AUTOBOOT;
210		(*f)();
211	}
212
213	while(1) ;	/* fool gcc */
214	/*NOTREACHED*/
215}
216
217/*
218 * Get the host SCSI ID from the PROM.
219 */
220int
221prom_scsiid(int cnum)
222{
223	char scsiid_var[8];	/* strlen("scsiidX") + NULL */
224	char *cp;
225
226	snprintf(scsiid_var, 8, "scsiid%d", cnum);
227	cp = prom_getenv(scsiid_var);
228	return (cp != NULL) ? strtoul(cp, NULL, 0) : DEFAULT_SCSIID;
229}
230
231/*
232 * Get the memory bitmap from the PROM if we can
233 */
234int
235prom_getbitmap(struct memmap *map)
236{
237	char *cp;
238	int len;
239
240	if (callv->_getbitmap != NULL)
241		return promcall(callv->_getbitmap, map);
242
243	/*
244	 * See if we can get the bitmap from the environment variables
245	 */
246	cp = prom_getenv("bitmaplen");
247	if (cp == NULL)
248		return 0;
249	len = (int)strtoul(cp, NULL, 0) * 4;
250	cp = prom_getenv("bitmap");
251	if (cp == NULL)
252		return 0;
253	memcpy(&map->bitmap, (char *)strtoul(cp, NULL, 0), len);
254	map->pagesize = 4096;
255	return len;
256}
257