1/*-
2 * Copyright (c) 2001 Mitsuru IWASAKI
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) 2001 Mitsuru IWASAKI
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/acpica/acpi_machdep.c 241856 2012-10-22 03:41:14Z eadler $");
| 28__FBSDID("$FreeBSD: head/sys/i386/acpica/acpi_machdep.c 241885 2012-10-22 13:06:09Z eadler $");
|
29
30#include <sys/param.h>
31#include <sys/bus.h>
32#include <sys/kernel.h>
33#include <sys/module.h>
34#include <sys/sysctl.h>
35
36#include <vm/vm.h>
37#include <vm/pmap.h>
38
39#include <contrib/dev/acpica/include/acpi.h>
40#include <contrib/dev/acpica/include/accommon.h>
41#include <contrib/dev/acpica/include/actables.h>
42
43#include <dev/acpica/acpivar.h>
44
45#include <machine/nexusvar.h>
46
47uint32_t acpi_resume_beep;
48TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep);
49SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep,
50 0, "Beep the PC speaker when resuming");
51
52uint32_t acpi_reset_video;
53TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
54
55static int intr_model = ACPI_INTR_PIC;
56
57int
58acpi_machdep_init(device_t dev)
59{
60 struct acpi_softc *sc;
61
62 sc = device_get_softc(dev);
63
64 acpi_apm_init(sc);
65 acpi_install_wakeup_handler(sc);
66
67 if (intr_model == ACPI_INTR_PIC)
68 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt,
69 INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
70 else
71 acpi_SetIntrModel(intr_model);
72
73 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
74 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
75 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
76 "Call the VESA reset BIOS vector on the resume path");
77
78 return (0);
79}
80
81void
82acpi_SetDefaultIntrModel(int model)
83{
84
85 intr_model = model;
86}
87
88/* Check BIOS date. If 1998 or older, disable ACPI. */
89int
90acpi_machdep_quirks(int *quirks)
91{
92 char *va;
93 int year;
94
95 /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
96 va = pmap_mapbios(0xffff0, 16);
97 sscanf(va + 11, "%2d", &year);
98 pmap_unmapbios((vm_offset_t)va, 16);
99
100 /*
101 * Date must be >= 1/1/1999 or we don't trust ACPI. Note that this
102 * check must be changed by my 114th birthday.
103 */
104 if (year > 90 && year < 99)
105 *quirks = ACPI_Q_BROKEN;
106
107 return (0);
108}
109
110void
111acpi_cpu_c1()
112{
113
114 __asm __volatile("sti; hlt");
115}
116
117/*
118 * Support for mapping ACPI tables during early boot. This abuses the
119 * crashdump map because the kernel cannot allocate KVA in
120 * pmap_mapbios() when this is used. This makes the following
121 * assumptions about how we use this KVA: pages 0 and 1 are used to
122 * map in the header of each table found via the RSDT or XSDT and
123 * pages 2 to n are used to map in the RSDT or XSDT. This has to use
124 * 2 pages for the table headers in case a header spans a page
125 * boundary.
126 *
127 * XXX: We don't ensure the table fits in the available address space
128 * in the crashdump map.
129 */
130
131/*
132 * Map some memory using the crashdump map. 'offset' is an offset in
133 * pages into the crashdump map to use for the start of the mapping.
134 */
135static void *
136table_map(vm_paddr_t pa, int offset, vm_offset_t length)
137{
138 vm_offset_t va, off;
139 void *data;
140
141 off = pa & PAGE_MASK;
142 length = roundup(length + off, PAGE_SIZE);
143 pa = pa & PG_FRAME;
144 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
145 (offset * PAGE_SIZE);
146 data = (void *)(va + off);
147 length -= PAGE_SIZE;
148 while (length > 0) {
149 va += PAGE_SIZE;
150 pa += PAGE_SIZE;
151 length -= PAGE_SIZE;
152 pmap_kenter(va, pa);
153 invlpg(va);
154 }
155 return (data);
156}
157
158/* Unmap memory previously mapped with table_map(). */
159static void
160table_unmap(void *data, vm_offset_t length)
161{
162 vm_offset_t va, off;
163
164 va = (vm_offset_t)data;
165 off = va & PAGE_MASK;
166 length = roundup(length + off, PAGE_SIZE);
167 va &= ~PAGE_MASK;
168 while (length > 0) {
169 pmap_kremove(va);
170 invlpg(va);
171 va += PAGE_SIZE;
172 length -= PAGE_SIZE;
173 }
174}
175
176/*
177 * Map a table at a given offset into the crashdump map. It first
178 * maps the header to determine the table length and then maps the
179 * entire table.
180 */
181static void *
182map_table(vm_paddr_t pa, int offset, const char *sig)
183{
184 ACPI_TABLE_HEADER *header;
185 vm_offset_t length;
186 void *table;
187
188 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
189 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
190 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
191 return (NULL);
192 }
193 length = header->Length;
194 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
195 table = table_map(pa, offset, length);
196 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
197 if (bootverbose)
198 printf("ACPI: Failed checksum for table %s\n", sig);
199#if (ACPI_CHECKSUM_ABORT)
200 table_unmap(table, length);
201 return (NULL);
202#endif
203 }
204 return (table);
205}
206
207/*
208 * See if a given ACPI table is the requested table. Returns the
209 * length of the able if it matches or zero on failure.
210 */
211static int
212probe_table(vm_paddr_t address, const char *sig)
213{
214 ACPI_TABLE_HEADER *table;
215
216 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));
217 if (table == NULL) {
218 if (bootverbose)
219 printf("ACPI: Failed to map table at 0x%jx\n",
220 (uintmax_t)address);
221 return (0);
222 }
223 if (bootverbose)
224 printf("Table '%.4s' at 0x%jx\n", table->Signature,
225 (uintmax_t)address);
226
227 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) {
228 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
229 return (0);
230 }
231 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
232 return (1);
233}
234
235/*
236 * Try to map a table at a given physical address previously returned
237 * by acpi_find_table().
238 */
239void *
240acpi_map_table(vm_paddr_t pa, const char *sig)
241{
242
243 return (map_table(pa, 0, sig));
244}
245
246/* Unmap a table previously mapped via acpi_map_table(). */
247void
248acpi_unmap_table(void *table)
249{
250 ACPI_TABLE_HEADER *header;
251
252 header = (ACPI_TABLE_HEADER *)table;
253 table_unmap(table, header->Length);
254}
255
256/*
257 * Return the physical address of the requested table or zero if one
258 * is not found.
259 */
260vm_paddr_t
261acpi_find_table(const char *sig)
262{
263 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
264 ACPI_TABLE_RSDP *rsdp;
265 ACPI_TABLE_RSDT *rsdt;
266 ACPI_TABLE_XSDT *xsdt;
267 ACPI_TABLE_HEADER *table;
268 vm_paddr_t addr;
269 int i, count;
270
| 29
30#include <sys/param.h>
31#include <sys/bus.h>
32#include <sys/kernel.h>
33#include <sys/module.h>
34#include <sys/sysctl.h>
35
36#include <vm/vm.h>
37#include <vm/pmap.h>
38
39#include <contrib/dev/acpica/include/acpi.h>
40#include <contrib/dev/acpica/include/accommon.h>
41#include <contrib/dev/acpica/include/actables.h>
42
43#include <dev/acpica/acpivar.h>
44
45#include <machine/nexusvar.h>
46
47uint32_t acpi_resume_beep;
48TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep);
49SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep,
50 0, "Beep the PC speaker when resuming");
51
52uint32_t acpi_reset_video;
53TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
54
55static int intr_model = ACPI_INTR_PIC;
56
57int
58acpi_machdep_init(device_t dev)
59{
60 struct acpi_softc *sc;
61
62 sc = device_get_softc(dev);
63
64 acpi_apm_init(sc);
65 acpi_install_wakeup_handler(sc);
66
67 if (intr_model == ACPI_INTR_PIC)
68 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt,
69 INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
70 else
71 acpi_SetIntrModel(intr_model);
72
73 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
74 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
75 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
76 "Call the VESA reset BIOS vector on the resume path");
77
78 return (0);
79}
80
81void
82acpi_SetDefaultIntrModel(int model)
83{
84
85 intr_model = model;
86}
87
88/* Check BIOS date. If 1998 or older, disable ACPI. */
89int
90acpi_machdep_quirks(int *quirks)
91{
92 char *va;
93 int year;
94
95 /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
96 va = pmap_mapbios(0xffff0, 16);
97 sscanf(va + 11, "%2d", &year);
98 pmap_unmapbios((vm_offset_t)va, 16);
99
100 /*
101 * Date must be >= 1/1/1999 or we don't trust ACPI. Note that this
102 * check must be changed by my 114th birthday.
103 */
104 if (year > 90 && year < 99)
105 *quirks = ACPI_Q_BROKEN;
106
107 return (0);
108}
109
110void
111acpi_cpu_c1()
112{
113
114 __asm __volatile("sti; hlt");
115}
116
117/*
118 * Support for mapping ACPI tables during early boot. This abuses the
119 * crashdump map because the kernel cannot allocate KVA in
120 * pmap_mapbios() when this is used. This makes the following
121 * assumptions about how we use this KVA: pages 0 and 1 are used to
122 * map in the header of each table found via the RSDT or XSDT and
123 * pages 2 to n are used to map in the RSDT or XSDT. This has to use
124 * 2 pages for the table headers in case a header spans a page
125 * boundary.
126 *
127 * XXX: We don't ensure the table fits in the available address space
128 * in the crashdump map.
129 */
130
131/*
132 * Map some memory using the crashdump map. 'offset' is an offset in
133 * pages into the crashdump map to use for the start of the mapping.
134 */
135static void *
136table_map(vm_paddr_t pa, int offset, vm_offset_t length)
137{
138 vm_offset_t va, off;
139 void *data;
140
141 off = pa & PAGE_MASK;
142 length = roundup(length + off, PAGE_SIZE);
143 pa = pa & PG_FRAME;
144 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
145 (offset * PAGE_SIZE);
146 data = (void *)(va + off);
147 length -= PAGE_SIZE;
148 while (length > 0) {
149 va += PAGE_SIZE;
150 pa += PAGE_SIZE;
151 length -= PAGE_SIZE;
152 pmap_kenter(va, pa);
153 invlpg(va);
154 }
155 return (data);
156}
157
158/* Unmap memory previously mapped with table_map(). */
159static void
160table_unmap(void *data, vm_offset_t length)
161{
162 vm_offset_t va, off;
163
164 va = (vm_offset_t)data;
165 off = va & PAGE_MASK;
166 length = roundup(length + off, PAGE_SIZE);
167 va &= ~PAGE_MASK;
168 while (length > 0) {
169 pmap_kremove(va);
170 invlpg(va);
171 va += PAGE_SIZE;
172 length -= PAGE_SIZE;
173 }
174}
175
176/*
177 * Map a table at a given offset into the crashdump map. It first
178 * maps the header to determine the table length and then maps the
179 * entire table.
180 */
181static void *
182map_table(vm_paddr_t pa, int offset, const char *sig)
183{
184 ACPI_TABLE_HEADER *header;
185 vm_offset_t length;
186 void *table;
187
188 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
189 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
190 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
191 return (NULL);
192 }
193 length = header->Length;
194 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
195 table = table_map(pa, offset, length);
196 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
197 if (bootverbose)
198 printf("ACPI: Failed checksum for table %s\n", sig);
199#if (ACPI_CHECKSUM_ABORT)
200 table_unmap(table, length);
201 return (NULL);
202#endif
203 }
204 return (table);
205}
206
207/*
208 * See if a given ACPI table is the requested table. Returns the
209 * length of the able if it matches or zero on failure.
210 */
211static int
212probe_table(vm_paddr_t address, const char *sig)
213{
214 ACPI_TABLE_HEADER *table;
215
216 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));
217 if (table == NULL) {
218 if (bootverbose)
219 printf("ACPI: Failed to map table at 0x%jx\n",
220 (uintmax_t)address);
221 return (0);
222 }
223 if (bootverbose)
224 printf("Table '%.4s' at 0x%jx\n", table->Signature,
225 (uintmax_t)address);
226
227 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) {
228 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
229 return (0);
230 }
231 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
232 return (1);
233}
234
235/*
236 * Try to map a table at a given physical address previously returned
237 * by acpi_find_table().
238 */
239void *
240acpi_map_table(vm_paddr_t pa, const char *sig)
241{
242
243 return (map_table(pa, 0, sig));
244}
245
246/* Unmap a table previously mapped via acpi_map_table(). */
247void
248acpi_unmap_table(void *table)
249{
250 ACPI_TABLE_HEADER *header;
251
252 header = (ACPI_TABLE_HEADER *)table;
253 table_unmap(table, header->Length);
254}
255
256/*
257 * Return the physical address of the requested table or zero if one
258 * is not found.
259 */
260vm_paddr_t
261acpi_find_table(const char *sig)
262{
263 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
264 ACPI_TABLE_RSDP *rsdp;
265 ACPI_TABLE_RSDT *rsdt;
266 ACPI_TABLE_XSDT *xsdt;
267 ACPI_TABLE_HEADER *table;
268 vm_paddr_t addr;
269 int i, count;
270
|
| 271 if (resource_disabled("acpi", 0))
272 return (0);
273
|
271 /*
272 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
273 * calls pmap_mapbios() to find the RSDP, we assume that we can use
274 * pmap_mapbios() to map the RSDP.
275 */
276 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
277 return (0);
278 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
279 if (rsdp == NULL) {
280 if (bootverbose)
281 printf("ACPI: Failed to map RSDP\n");
282 return (0);
283 }
284
285 /*
286 * For ACPI >= 2.0, use the XSDT if it is available.
287 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2
288 * in the crashdump area. Pages 0 and 1 are used to map in the
289 * headers of candidate ACPI tables.
290 */
291 addr = 0;
292 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
293 /*
294 * AcpiOsGetRootPointer only verifies the checksum for
295 * the version 1.0 portion of the RSDP. Version 2.0 has
296 * an additional checksum that we verify first.
297 */
298 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
299 if (bootverbose)
300 printf("ACPI: RSDP failed extended checksum\n");
301 return (0);
302 }
303 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);
304 if (xsdt == NULL) {
305 if (bootverbose)
306 printf("ACPI: Failed to map XSDT\n");
307 return (0);
308 }
309 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
310 sizeof(UINT64);
311 for (i = 0; i < count; i++)
312 if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
313 addr = xsdt->TableOffsetEntry[i];
314 break;
315 }
316 acpi_unmap_table(xsdt);
317 } else {
318 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);
319 if (rsdt == NULL) {
320 if (bootverbose)
321 printf("ACPI: Failed to map RSDT\n");
322 return (0);
323 }
324 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
325 sizeof(UINT32);
326 for (i = 0; i < count; i++)
327 if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
328 addr = rsdt->TableOffsetEntry[i];
329 break;
330 }
331 acpi_unmap_table(rsdt);
332 }
333 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
334 if (addr == 0) {
335 if (bootverbose)
336 printf("ACPI: No %s table found\n", sig);
337 return (0);
338 }
339 if (bootverbose)
340 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr);
341
342 /*
343 * Verify that we can map the full table and that its checksum is
344 * correct, etc.
345 */
346 table = map_table(addr, 0, sig);
347 if (table == NULL)
348 return (0);
349 acpi_unmap_table(table);
350
351 return (addr);
352}
353
354/*
355 * ACPI nexus(4) driver.
356 */
357static int
358nexus_acpi_probe(device_t dev)
359{
360 int error;
361
362 error = acpi_identify();
363 if (error)
364 return (error);
365
366 return (BUS_PROBE_DEFAULT);
367}
368
369static int
370nexus_acpi_attach(device_t dev)
371{
372
373 nexus_init_resources();
374 bus_generic_probe(dev);
375 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
376 panic("failed to add acpi0 device");
377
378 return (bus_generic_attach(dev));
379}
380
381static device_method_t nexus_acpi_methods[] = {
382 /* Device interface */
383 DEVMETHOD(device_probe, nexus_acpi_probe),
384 DEVMETHOD(device_attach, nexus_acpi_attach),
385
386 { 0, 0 }
387};
388
389DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
390static devclass_t nexus_devclass;
391
392DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);
| 274 /*
275 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
276 * calls pmap_mapbios() to find the RSDP, we assume that we can use
277 * pmap_mapbios() to map the RSDP.
278 */
279 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
280 return (0);
281 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
282 if (rsdp == NULL) {
283 if (bootverbose)
284 printf("ACPI: Failed to map RSDP\n");
285 return (0);
286 }
287
288 /*
289 * For ACPI >= 2.0, use the XSDT if it is available.
290 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2
291 * in the crashdump area. Pages 0 and 1 are used to map in the
292 * headers of candidate ACPI tables.
293 */
294 addr = 0;
295 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
296 /*
297 * AcpiOsGetRootPointer only verifies the checksum for
298 * the version 1.0 portion of the RSDP. Version 2.0 has
299 * an additional checksum that we verify first.
300 */
301 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
302 if (bootverbose)
303 printf("ACPI: RSDP failed extended checksum\n");
304 return (0);
305 }
306 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);
307 if (xsdt == NULL) {
308 if (bootverbose)
309 printf("ACPI: Failed to map XSDT\n");
310 return (0);
311 }
312 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
313 sizeof(UINT64);
314 for (i = 0; i < count; i++)
315 if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
316 addr = xsdt->TableOffsetEntry[i];
317 break;
318 }
319 acpi_unmap_table(xsdt);
320 } else {
321 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);
322 if (rsdt == NULL) {
323 if (bootverbose)
324 printf("ACPI: Failed to map RSDT\n");
325 return (0);
326 }
327 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
328 sizeof(UINT32);
329 for (i = 0; i < count; i++)
330 if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
331 addr = rsdt->TableOffsetEntry[i];
332 break;
333 }
334 acpi_unmap_table(rsdt);
335 }
336 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
337 if (addr == 0) {
338 if (bootverbose)
339 printf("ACPI: No %s table found\n", sig);
340 return (0);
341 }
342 if (bootverbose)
343 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr);
344
345 /*
346 * Verify that we can map the full table and that its checksum is
347 * correct, etc.
348 */
349 table = map_table(addr, 0, sig);
350 if (table == NULL)
351 return (0);
352 acpi_unmap_table(table);
353
354 return (addr);
355}
356
357/*
358 * ACPI nexus(4) driver.
359 */
360static int
361nexus_acpi_probe(device_t dev)
362{
363 int error;
364
365 error = acpi_identify();
366 if (error)
367 return (error);
368
369 return (BUS_PROBE_DEFAULT);
370}
371
372static int
373nexus_acpi_attach(device_t dev)
374{
375
376 nexus_init_resources();
377 bus_generic_probe(dev);
378 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
379 panic("failed to add acpi0 device");
380
381 return (bus_generic_attach(dev));
382}
383
384static device_method_t nexus_acpi_methods[] = {
385 /* Device interface */
386 DEVMETHOD(device_probe, nexus_acpi_probe),
387 DEVMETHOD(device_attach, nexus_acpi_attach),
388
389 { 0, 0 }
390};
391
392DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
393static devclass_t nexus_devclass;
394
395DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);
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