1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2001 Mitsuru IWASAKI
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/param.h>
30 #include <sys/bus.h>
31 #include <sys/kernel.h>
32 #include <sys/module.h>
33 #include <sys/sysctl.h>
34
35 #include <vm/vm.h>
36 #include <vm/pmap.h>
37
38 #include <contrib/dev/acpica/include/acpi.h>
39 #include <contrib/dev/acpica/include/accommon.h>
40 #include <contrib/dev/acpica/include/actables.h>
41
42 #include <dev/acpica/acpivar.h>
43
44 #include <machine/nexusvar.h>
45
46 int acpi_resume_beep;
47 SYSCTL_INT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN,
48 &acpi_resume_beep, 0, "Beep the PC speaker when resuming");
49
50 int acpi_reset_video;
51 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
52
53 static int intr_model = ACPI_INTR_PIC;
54
55 int
acpi_machdep_init(device_t dev)56 acpi_machdep_init(device_t dev)
57 {
58 struct acpi_softc *sc;
59
60 sc = device_get_softc(dev);
61
62 acpi_apm_init(sc);
63 acpi_install_wakeup_handler(sc);
64
65 if (intr_model != ACPI_INTR_PIC)
66 acpi_SetIntrModel(intr_model);
67
68 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx,
69 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
70 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
71 "Call the VESA reset BIOS vector on the resume path");
72
73 return (0);
74 }
75
76 void
acpi_SetDefaultIntrModel(int model)77 acpi_SetDefaultIntrModel(int model)
78 {
79
80 intr_model = model;
81 }
82
83 int
acpi_machdep_quirks(int * quirks)84 acpi_machdep_quirks(int *quirks)
85 {
86
87 return (0);
88 }
89
90 /*
91 * Map a table. First map the header to determine the table length and then map
92 * the entire table.
93 */
94 static void *
map_table(vm_paddr_t pa,const char * sig)95 map_table(vm_paddr_t pa, const char *sig)
96 {
97 ACPI_TABLE_HEADER *header;
98 vm_size_t length;
99 void *table;
100
101 header = pmap_mapbios(pa, sizeof(ACPI_TABLE_HEADER));
102 if (strncmp(header->Signature, sig, ACPI_NAMESEG_SIZE) != 0) {
103 pmap_unmapbios(header, sizeof(ACPI_TABLE_HEADER));
104 return (NULL);
105 }
106 length = header->Length;
107 pmap_unmapbios(header, sizeof(ACPI_TABLE_HEADER));
108 table = pmap_mapbios(pa, length);
109 if (ACPI_FAILURE(AcpiUtChecksum(table, length))) {
110 if (bootverbose)
111 printf("ACPI: Failed checksum for table %s\n", sig);
112 #if (ACPI_CHECKSUM_ABORT)
113 pmap_unmapbios(table, length);
114 return (NULL);
115 #endif
116 }
117 return (table);
118 }
119
120 /*
121 * See if a given ACPI table is the requested table. Returns the
122 * length of the table if it matches or zero on failure.
123 */
124 static int
probe_table(vm_paddr_t address,const char * sig)125 probe_table(vm_paddr_t address, const char *sig)
126 {
127 ACPI_TABLE_HEADER *table;
128 int ret;
129
130 table = pmap_mapbios(address, sizeof(ACPI_TABLE_HEADER));
131 ret = strncmp(table->Signature, sig, ACPI_NAMESEG_SIZE) == 0;
132 pmap_unmapbios(table, sizeof(ACPI_TABLE_HEADER));
133 return (ret);
134 }
135
136 /*
137 * Try to map a table at a given physical address previously returned
138 * by acpi_find_table().
139 */
140 void *
acpi_map_table(vm_paddr_t pa,const char * sig)141 acpi_map_table(vm_paddr_t pa, const char *sig)
142 {
143
144 return (map_table(pa, sig));
145 }
146
147 /* Unmap a table previously mapped via acpi_map_table(). */
148 void
acpi_unmap_table(void * table)149 acpi_unmap_table(void *table)
150 {
151 ACPI_TABLE_HEADER *header;
152
153 header = (ACPI_TABLE_HEADER *)table;
154 pmap_unmapbios(table, header->Length);
155 }
156
157 /*
158 * Return the physical address of the requested table or zero if one
159 * is not found.
160 */
161 vm_paddr_t
acpi_find_table(const char * sig)162 acpi_find_table(const char *sig)
163 {
164 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
165 ACPI_TABLE_RSDP *rsdp;
166 ACPI_TABLE_RSDT *rsdt;
167 ACPI_TABLE_XSDT *xsdt;
168 ACPI_TABLE_HEADER *table;
169 vm_paddr_t addr;
170 int i, count;
171
172 if (resource_disabled("acpi", 0))
173 return (0);
174
175 /*
176 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
177 * calls pmap_mapbios() to find the RSDP, we assume that we can use
178 * pmap_mapbios() to map the RSDP.
179 */
180 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
181 return (0);
182 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
183 if (rsdp == NULL) {
184 printf("ACPI: Failed to map RSDP\n");
185 return (0);
186 }
187
188 /*
189 * For ACPI >= 2.0, use the XSDT if it is available.
190 * Otherwise, use the RSDT.
191 */
192 addr = 0;
193 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
194 /*
195 * AcpiOsGetRootPointer only verifies the checksum for
196 * the version 1.0 portion of the RSDP. Version 2.0 has
197 * an additional checksum that we verify first.
198 */
199 if (AcpiUtChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
200 printf("ACPI: RSDP failed extended checksum\n");
201 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP));
202 return (0);
203 }
204 xsdt = map_table(rsdp->XsdtPhysicalAddress, ACPI_SIG_XSDT);
205 if (xsdt == NULL) {
206 printf("ACPI: Failed to map XSDT\n");
207 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP));
208 return (0);
209 }
210 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
211 sizeof(UINT64);
212 for (i = 0; i < count; i++)
213 if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
214 addr = xsdt->TableOffsetEntry[i];
215 break;
216 }
217 acpi_unmap_table(xsdt);
218 } else {
219 rsdt = map_table(rsdp->RsdtPhysicalAddress, ACPI_SIG_RSDT);
220 if (rsdt == NULL) {
221 printf("ACPI: Failed to map RSDT\n");
222 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP));
223 return (0);
224 }
225 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
226 sizeof(UINT32);
227 for (i = 0; i < count; i++)
228 if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
229 addr = rsdt->TableOffsetEntry[i];
230 break;
231 }
232 acpi_unmap_table(rsdt);
233 }
234 pmap_unmapbios(rsdp, sizeof(ACPI_TABLE_RSDP));
235 if (addr == 0)
236 return (0);
237
238 /*
239 * Verify that we can map the full table and that its checksum is
240 * correct, etc.
241 */
242 table = map_table(addr, sig);
243 if (table == NULL)
244 return (0);
245 acpi_unmap_table(table);
246
247 return (addr);
248 }
249
250 /*
251 * ACPI nexus(4) driver.
252 */
253 static int
nexus_acpi_probe(device_t dev)254 nexus_acpi_probe(device_t dev)
255 {
256 int error;
257
258 error = acpi_identify();
259 if (error)
260 return (error);
261 device_quiet(dev);
262 return (BUS_PROBE_DEFAULT);
263 }
264
265 static int
nexus_acpi_attach(device_t dev)266 nexus_acpi_attach(device_t dev)
267 {
268
269 nexus_init_resources();
270 bus_identify_children(dev);
271 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
272 panic("failed to add acpi0 device");
273 bus_attach_children(dev);
274
275 return (0);
276 }
277
278 static device_method_t nexus_acpi_methods[] = {
279 /* Device interface */
280 DEVMETHOD(device_probe, nexus_acpi_probe),
281 DEVMETHOD(device_attach, nexus_acpi_attach),
282 { 0, 0 }
283 };
284
285 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
286
287 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, 0, 0);
288