1 /* $NetBSD: promcall.c,v 1.21 2011/07/09 17:32:31 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 1.21 2011/07/09 17:32:31 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
55 static int romgetc(dev_t);
56 static 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 */
64 struct 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 */
78 static int
romgetc(dev_t dev)79 romgetc(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 */
92 static void
romputc(dev_t dev,int c)93 romputc(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 */
107 void
prom_findcons(int * kbdslot,int * crtslot,int * prom_using_screen)108 prom_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 */
156 char *
prom_getenv(const char * name)157 prom_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 */
170 int
prom_systype(void)171 prom_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 */
188 void
prom_haltbutton(void)189 prom_haltbutton(void)
190 {
191
192 promcall(callv->_halt, (int *)0, 0);
193 }
194
195 /*
196 * Halt/reboot machine.
197 */
198 void __dead
prom_halt(int howto,char * bootstr)199 prom_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 */
220 int
prom_scsiid(int cnum)221 prom_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 */
234 int
prom_getbitmap(struct memmap * map)235 prom_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