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smapi.c (120506) smapi.c (126076)
1/*-
2 * Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/i386/bios/smapi.c 120506 2003-09-27 12:01:01Z phk $");
28__FBSDID("$FreeBSD: head/sys/i386/bios/smapi.c 126076 2004-02-21 19:42:58Z phk $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/kernel.h>
33
34#include <sys/module.h>
35#include <sys/bus.h>
36#include <sys/conf.h>
37
38#include <machine/bus.h>
39#include <machine/resource.h>
40#include <sys/rman.h>
41
42/* And all this for BIOS_PADDRTOVADDR() */
43#include <vm/vm.h>
44#include <vm/pmap.h>
45#include <machine/md_var.h>
46#include <machine/pc/bios.h>
47
48#include <machine/smapi.h>
49
50#define SMAPI_START 0xf0000
51#define SMAPI_STEP 0x10
52#define SMAPI_OFF 0
53#define SMAPI_LEN 4
54#define SMAPI_SIG "$SMB"
55
56#define RES2HDR(res) ((struct smapi_bios_header *)rman_get_virtual(res))
57#define ADDR2HDR(addr) ((struct smapi_bios_header *)BIOS_PADDRTOVADDR(addr))
58
59struct smapi_softc {
60 dev_t cdev;
61 device_t dev;
62 struct resource * res;
63 int rid;
64
65 u_int32_t smapi32_entry;
66
67 struct smapi_bios_header *header;
68};
69
70extern u_long smapi32_offset;
71extern u_short smapi32_segment;
72
73devclass_t smapi_devclass;
74
75static d_ioctl_t smapi_ioctl;
76
77static struct cdevsw smapi_cdevsw = {
78 .d_ioctl = smapi_ioctl,
79 .d_name = "smapi",
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/kernel.h>
33
34#include <sys/module.h>
35#include <sys/bus.h>
36#include <sys/conf.h>
37
38#include <machine/bus.h>
39#include <machine/resource.h>
40#include <sys/rman.h>
41
42/* And all this for BIOS_PADDRTOVADDR() */
43#include <vm/vm.h>
44#include <vm/pmap.h>
45#include <machine/md_var.h>
46#include <machine/pc/bios.h>
47
48#include <machine/smapi.h>
49
50#define SMAPI_START 0xf0000
51#define SMAPI_STEP 0x10
52#define SMAPI_OFF 0
53#define SMAPI_LEN 4
54#define SMAPI_SIG "$SMB"
55
56#define RES2HDR(res) ((struct smapi_bios_header *)rman_get_virtual(res))
57#define ADDR2HDR(addr) ((struct smapi_bios_header *)BIOS_PADDRTOVADDR(addr))
58
59struct smapi_softc {
60 dev_t cdev;
61 device_t dev;
62 struct resource * res;
63 int rid;
64
65 u_int32_t smapi32_entry;
66
67 struct smapi_bios_header *header;
68};
69
70extern u_long smapi32_offset;
71extern u_short smapi32_segment;
72
73devclass_t smapi_devclass;
74
75static d_ioctl_t smapi_ioctl;
76
77static struct cdevsw smapi_cdevsw = {
78 .d_ioctl = smapi_ioctl,
79 .d_name = "smapi",
80 .d_maj = MAJOR_AUTO,
81 .d_flags = D_MEM,
82};
83
84static void smapi_identify (driver_t *, device_t);
85static int smapi_probe (device_t);
86static int smapi_attach (device_t);
87static int smapi_detach (device_t);
88static int smapi_modevent (module_t, int, void *);
89
90static int smapi_header_cksum (struct smapi_bios_header *);
91
92extern int smapi32 (struct smapi_bios_parameter *,
93 struct smapi_bios_parameter *);
94extern int smapi32_new (u_long, u_short,
95 struct smapi_bios_parameter *,
96 struct smapi_bios_parameter *);
97
98static int
99smapi_ioctl (dev, cmd, data, fflag, td)
100 dev_t dev;
101 u_long cmd;
102 caddr_t data;
103 int fflag;
104 d_thread_t * td;
105{
106 struct smapi_softc *sc;
107 int error;
108
109 error = 0;
110 sc = devclass_get_softc(smapi_devclass, minor(dev));
111 if (sc == NULL) {
112 error = ENXIO;
113 goto fail;
114 }
115
116 switch (cmd) {
117 case SMAPIOGHEADER:
118 bcopy((caddr_t)sc->header, data,
119 sizeof(struct smapi_bios_header));
120 error = 0;
121 break;
122 case SMAPIOCGFUNCTION:
123 smapi32_offset = sc->smapi32_entry;
124 error = smapi32((struct smapi_bios_parameter *)data,
125 (struct smapi_bios_parameter *)data);
126 break;
127 default:
128 error = ENOTTY;
129 }
130
131fail:
132 return (error);
133}
134
135static int
136smapi_header_cksum (struct smapi_bios_header *header)
137{
138 u_int8_t *ptr;
139 u_int8_t cksum;
140 int i;
141
142 ptr = (u_int8_t *)header;
143 cksum = 0;
144 for (i = 0; i < header->length; i++) {
145 cksum += ptr[i];
146 }
147
148 return (cksum);
149}
150
151static void
152smapi_identify (driver_t *driver, device_t parent)
153{
154 device_t child;
155 u_int32_t addr;
156 int length;
157 int rid;
158
159 if (!device_is_alive(parent))
160 return;
161
162 addr = bios_sigsearch(SMAPI_START, SMAPI_SIG, SMAPI_LEN,
163 SMAPI_STEP, SMAPI_OFF);
164 if (addr != 0) {
165 rid = 0;
166 length = ADDR2HDR(addr)->length;
167
168 child = BUS_ADD_CHILD(parent, 0, "smapi", -1);
169 device_set_driver(child, driver);
170 bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length);
171 device_set_desc(child, "SMAPI BIOS");
172 }
173
174 return;
175}
176
177static int
178smapi_probe (device_t dev)
179{
180 struct resource *res;
181 int rid;
182 int error;
183
184 error = 0;
185 rid = 0;
186 res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
187 0ul, ~0ul, 1, RF_ACTIVE);
188 if (res == NULL) {
189 device_printf(dev, "Unable to allocate memory resource.\n");
190 error = ENOMEM;
191 goto bad;
192 }
193
194 if (smapi_header_cksum(RES2HDR(res))) {
195 device_printf(dev, "SMAPI header checksum failed.\n");
196 error = ENXIO;
197 goto bad;
198 }
199
200bad:
201 if (res)
202 bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
203 return (error);
204}
205
206static int
207smapi_attach (device_t dev)
208{
209 struct smapi_softc *sc;
210 int error;
211
212 sc = device_get_softc(dev);
213 error = 0;
214
215 sc->dev = dev;
216 sc->rid = 0;
217 sc->res = bus_alloc_resource(dev, SYS_RES_MEMORY, &sc->rid,
218 0ul, ~0ul, 1, RF_ACTIVE);
219 if (sc->res == NULL) {
220 device_printf(dev, "Unable to allocate memory resource.\n");
221 error = ENOMEM;
222 goto bad;
223 }
224 sc->header = (struct smapi_bios_header *)rman_get_virtual(sc->res);
225 sc->smapi32_entry = (u_int32_t)BIOS_PADDRTOVADDR(
226 sc->header->prot32_segment +
227 sc->header->prot32_offset);
228
229 sc->cdev = make_dev(&smapi_cdevsw,
230 device_get_unit(sc->dev),
231 UID_ROOT, GID_WHEEL, 0600,
232 "%s%d",
233 smapi_cdevsw.d_name,
234 device_get_unit(sc->dev));
235
236 device_printf(dev, "Version: %d.%02d, Length: %d, Checksum: 0x%02x\n",
237 bcd2bin(sc->header->version_major),
238 bcd2bin(sc->header->version_minor),
239 sc->header->length,
240 sc->header->checksum);
241 device_printf(dev, "Information=0x%b\n",
242 sc->header->information,
243 "\020"
244 "\001REAL_VM86"
245 "\002PROTECTED_16"
246 "\003PROTECTED_32");
247
248 if (bootverbose) {
249 if (sc->header->information & SMAPI_REAL_VM86)
250 device_printf(dev, "Real/VM86 mode: Segment 0x%04x, Offset 0x%04x\n",
251 sc->header->real16_segment,
252 sc->header->real16_offset);
253 if (sc->header->information & SMAPI_PROT_16BIT)
254 device_printf(dev, "16-bit Protected mode: Segment 0x%08x, Offset 0x%04x\n",
255 sc->header->prot16_segment,
256 sc->header->prot16_offset);
257 if (sc->header->information & SMAPI_PROT_32BIT)
258 device_printf(dev, "32-bit Protected mode: Segment 0x%08x, Offset 0x%08x\n",
259 sc->header->prot32_segment,
260 sc->header->prot32_offset);
261 }
262
263 return (0);
264bad:
265 if (sc->res)
266 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
267 return (error);
268}
269
270static int
271smapi_detach (device_t dev)
272{
273 struct smapi_softc *sc;
274
275 sc = device_get_softc(dev);
276
277 destroy_dev(sc->cdev);
278
279 if (sc->res)
280 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
281
282 return (0);
283}
284
285static int
286smapi_modevent (mod, what, arg)
287 module_t mod;
288 int what;
289 void * arg;
290{
291 device_t * devs;
292 int count;
293 int i;
294
295 switch (what) {
296 case MOD_LOAD:
297 break;
298 case MOD_UNLOAD:
299 devclass_get_devices(smapi_devclass, &devs, &count);
300 for (i = 0; i < count; i++) {
301 device_delete_child(device_get_parent(devs[i]), devs[i]);
302 }
303 break;
304 default:
305 break;
306 }
307
308 return (0);
309}
310
311static device_method_t smapi_methods[] = {
312 /* Device interface */
313 DEVMETHOD(device_identify, smapi_identify),
314 DEVMETHOD(device_probe, smapi_probe),
315 DEVMETHOD(device_attach, smapi_attach),
316 DEVMETHOD(device_detach, smapi_detach),
317 { 0, 0 }
318};
319
320static driver_t smapi_driver = {
321 "smapi",
322 smapi_methods,
323 sizeof(struct smapi_softc),
324};
325
326DRIVER_MODULE(smapi, nexus, smapi_driver, smapi_devclass, smapi_modevent, 0);
327MODULE_VERSION(smapi, 1);
80 .d_flags = D_MEM,
81};
82
83static void smapi_identify (driver_t *, device_t);
84static int smapi_probe (device_t);
85static int smapi_attach (device_t);
86static int smapi_detach (device_t);
87static int smapi_modevent (module_t, int, void *);
88
89static int smapi_header_cksum (struct smapi_bios_header *);
90
91extern int smapi32 (struct smapi_bios_parameter *,
92 struct smapi_bios_parameter *);
93extern int smapi32_new (u_long, u_short,
94 struct smapi_bios_parameter *,
95 struct smapi_bios_parameter *);
96
97static int
98smapi_ioctl (dev, cmd, data, fflag, td)
99 dev_t dev;
100 u_long cmd;
101 caddr_t data;
102 int fflag;
103 d_thread_t * td;
104{
105 struct smapi_softc *sc;
106 int error;
107
108 error = 0;
109 sc = devclass_get_softc(smapi_devclass, minor(dev));
110 if (sc == NULL) {
111 error = ENXIO;
112 goto fail;
113 }
114
115 switch (cmd) {
116 case SMAPIOGHEADER:
117 bcopy((caddr_t)sc->header, data,
118 sizeof(struct smapi_bios_header));
119 error = 0;
120 break;
121 case SMAPIOCGFUNCTION:
122 smapi32_offset = sc->smapi32_entry;
123 error = smapi32((struct smapi_bios_parameter *)data,
124 (struct smapi_bios_parameter *)data);
125 break;
126 default:
127 error = ENOTTY;
128 }
129
130fail:
131 return (error);
132}
133
134static int
135smapi_header_cksum (struct smapi_bios_header *header)
136{
137 u_int8_t *ptr;
138 u_int8_t cksum;
139 int i;
140
141 ptr = (u_int8_t *)header;
142 cksum = 0;
143 for (i = 0; i < header->length; i++) {
144 cksum += ptr[i];
145 }
146
147 return (cksum);
148}
149
150static void
151smapi_identify (driver_t *driver, device_t parent)
152{
153 device_t child;
154 u_int32_t addr;
155 int length;
156 int rid;
157
158 if (!device_is_alive(parent))
159 return;
160
161 addr = bios_sigsearch(SMAPI_START, SMAPI_SIG, SMAPI_LEN,
162 SMAPI_STEP, SMAPI_OFF);
163 if (addr != 0) {
164 rid = 0;
165 length = ADDR2HDR(addr)->length;
166
167 child = BUS_ADD_CHILD(parent, 0, "smapi", -1);
168 device_set_driver(child, driver);
169 bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length);
170 device_set_desc(child, "SMAPI BIOS");
171 }
172
173 return;
174}
175
176static int
177smapi_probe (device_t dev)
178{
179 struct resource *res;
180 int rid;
181 int error;
182
183 error = 0;
184 rid = 0;
185 res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
186 0ul, ~0ul, 1, RF_ACTIVE);
187 if (res == NULL) {
188 device_printf(dev, "Unable to allocate memory resource.\n");
189 error = ENOMEM;
190 goto bad;
191 }
192
193 if (smapi_header_cksum(RES2HDR(res))) {
194 device_printf(dev, "SMAPI header checksum failed.\n");
195 error = ENXIO;
196 goto bad;
197 }
198
199bad:
200 if (res)
201 bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
202 return (error);
203}
204
205static int
206smapi_attach (device_t dev)
207{
208 struct smapi_softc *sc;
209 int error;
210
211 sc = device_get_softc(dev);
212 error = 0;
213
214 sc->dev = dev;
215 sc->rid = 0;
216 sc->res = bus_alloc_resource(dev, SYS_RES_MEMORY, &sc->rid,
217 0ul, ~0ul, 1, RF_ACTIVE);
218 if (sc->res == NULL) {
219 device_printf(dev, "Unable to allocate memory resource.\n");
220 error = ENOMEM;
221 goto bad;
222 }
223 sc->header = (struct smapi_bios_header *)rman_get_virtual(sc->res);
224 sc->smapi32_entry = (u_int32_t)BIOS_PADDRTOVADDR(
225 sc->header->prot32_segment +
226 sc->header->prot32_offset);
227
228 sc->cdev = make_dev(&smapi_cdevsw,
229 device_get_unit(sc->dev),
230 UID_ROOT, GID_WHEEL, 0600,
231 "%s%d",
232 smapi_cdevsw.d_name,
233 device_get_unit(sc->dev));
234
235 device_printf(dev, "Version: %d.%02d, Length: %d, Checksum: 0x%02x\n",
236 bcd2bin(sc->header->version_major),
237 bcd2bin(sc->header->version_minor),
238 sc->header->length,
239 sc->header->checksum);
240 device_printf(dev, "Information=0x%b\n",
241 sc->header->information,
242 "\020"
243 "\001REAL_VM86"
244 "\002PROTECTED_16"
245 "\003PROTECTED_32");
246
247 if (bootverbose) {
248 if (sc->header->information & SMAPI_REAL_VM86)
249 device_printf(dev, "Real/VM86 mode: Segment 0x%04x, Offset 0x%04x\n",
250 sc->header->real16_segment,
251 sc->header->real16_offset);
252 if (sc->header->information & SMAPI_PROT_16BIT)
253 device_printf(dev, "16-bit Protected mode: Segment 0x%08x, Offset 0x%04x\n",
254 sc->header->prot16_segment,
255 sc->header->prot16_offset);
256 if (sc->header->information & SMAPI_PROT_32BIT)
257 device_printf(dev, "32-bit Protected mode: Segment 0x%08x, Offset 0x%08x\n",
258 sc->header->prot32_segment,
259 sc->header->prot32_offset);
260 }
261
262 return (0);
263bad:
264 if (sc->res)
265 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
266 return (error);
267}
268
269static int
270smapi_detach (device_t dev)
271{
272 struct smapi_softc *sc;
273
274 sc = device_get_softc(dev);
275
276 destroy_dev(sc->cdev);
277
278 if (sc->res)
279 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
280
281 return (0);
282}
283
284static int
285smapi_modevent (mod, what, arg)
286 module_t mod;
287 int what;
288 void * arg;
289{
290 device_t * devs;
291 int count;
292 int i;
293
294 switch (what) {
295 case MOD_LOAD:
296 break;
297 case MOD_UNLOAD:
298 devclass_get_devices(smapi_devclass, &devs, &count);
299 for (i = 0; i < count; i++) {
300 device_delete_child(device_get_parent(devs[i]), devs[i]);
301 }
302 break;
303 default:
304 break;
305 }
306
307 return (0);
308}
309
310static device_method_t smapi_methods[] = {
311 /* Device interface */
312 DEVMETHOD(device_identify, smapi_identify),
313 DEVMETHOD(device_probe, smapi_probe),
314 DEVMETHOD(device_attach, smapi_attach),
315 DEVMETHOD(device_detach, smapi_detach),
316 { 0, 0 }
317};
318
319static driver_t smapi_driver = {
320 "smapi",
321 smapi_methods,
322 sizeof(struct smapi_softc),
323};
324
325DRIVER_MODULE(smapi, nexus, smapi_driver, smapi_devclass, smapi_modevent, 0);
326MODULE_VERSION(smapi, 1);