2 * Copyright (c) 2001 Mitsuru IWASAKI
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/sysctl.h>
38 #include <contrib/dev/acpica/include/acpi.h>
39 #include <contrib/dev/acpica/include/accommon.h>
40 #include <contrib/dev/acpica/include/actables.h>
42 #include <dev/acpica/acpivar.h>
44 #include <machine/nexusvar.h>
46 SYSCTL_DECL(_debug_acpi);
49 TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep);
50 SYSCTL_INT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep,
51 0, "Beep the PC speaker when resuming");
54 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
56 static int intr_model = ACPI_INTR_PIC;
57 static struct apm_clone_data acpi_clone;
60 acpi_machdep_init(device_t dev)
62 struct acpi_softc *sc;
64 sc = devclass_get_softc(devclass_find("acpi"), 0);
66 /* Create a fake clone for /dev/acpi. */
67 STAILQ_INIT(&sc->apm_cdevs);
68 acpi_clone.cdev = sc->acpi_dev_t;
69 acpi_clone.acpi_sc = sc;
71 STAILQ_INSERT_TAIL(&sc->apm_cdevs, &acpi_clone, entries);
73 sc->acpi_clone = &acpi_clone;
74 acpi_install_wakeup_handler(sc);
76 if (intr_model != ACPI_INTR_PIC)
77 acpi_SetIntrModel(intr_model);
79 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
80 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
81 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
82 "Call the VESA reset BIOS vector on the resume path");
88 acpi_SetDefaultIntrModel(int model)
95 acpi_machdep_quirks(int *quirks)
103 __asm __volatile("sti; hlt");
107 * Support for mapping ACPI tables during early boot. Currently this
108 * uses the crashdump map to map each table. However, the crashdump
109 * map is created in pmap_bootstrap() right after the direct map, so
110 * we should be able to just use pmap_mapbios() here instead.
112 * This makes the following assumptions about how we use this KVA:
113 * pages 0 and 1 are used to map in the header of each table found via
114 * the RSDT or XSDT and pages 2 to n are used to map in the RSDT or
115 * XSDT. This has to use 2 pages for the table headers in case a
116 * header spans a page boundary.
118 * XXX: We don't ensure the table fits in the available address space
119 * in the crashdump map.
123 * Map some memory using the crashdump map. 'offset' is an offset in
124 * pages into the crashdump map to use for the start of the mapping.
127 table_map(vm_paddr_t pa, int offset, vm_offset_t length)
132 off = pa & PAGE_MASK;
133 length = roundup(length + off, PAGE_SIZE);
135 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
136 (offset * PAGE_SIZE);
137 data = (void *)(va + off);
149 /* Unmap memory previously mapped with table_map(). */
151 table_unmap(void *data, vm_offset_t length)
155 va = (vm_offset_t)data;
156 off = va & PAGE_MASK;
157 length = roundup(length + off, PAGE_SIZE);
168 * Map a table at a given offset into the crashdump map. It first
169 * maps the header to determine the table length and then maps the
173 map_table(vm_paddr_t pa, int offset, const char *sig)
175 ACPI_TABLE_HEADER *header;
179 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
180 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
181 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
184 length = header->Length;
185 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
186 table = table_map(pa, offset, length);
187 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
189 printf("ACPI: Failed checksum for table %s\n", sig);
190 #if (ACPI_CHECKSUM_ABORT)
191 table_unmap(table, length);
199 * See if a given ACPI table is the requested table. Returns the
200 * length of the able if it matches or zero on failure.
203 probe_table(vm_paddr_t address, const char *sig)
205 ACPI_TABLE_HEADER *table;
207 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));
210 printf("ACPI: Failed to map table at 0x%jx\n",
215 printf("Table '%.4s' at 0x%jx\n", table->Signature,
218 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) {
219 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
222 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
227 * Try to map a table at a given physical address previously returned
228 * by acpi_find_table().
231 acpi_map_table(vm_paddr_t pa, const char *sig)
234 return (map_table(pa, 0, sig));
237 /* Unmap a table previously mapped via acpi_map_table(). */
239 acpi_unmap_table(void *table)
241 ACPI_TABLE_HEADER *header;
243 header = (ACPI_TABLE_HEADER *)table;
244 table_unmap(table, header->Length);
248 * Return the physical address of the requested table or zero if one
252 acpi_find_table(const char *sig)
254 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
255 ACPI_TABLE_RSDP *rsdp;
256 ACPI_TABLE_RSDT *rsdt;
257 ACPI_TABLE_XSDT *xsdt;
258 ACPI_TABLE_HEADER *table;
262 if (resource_disabled("acpi", 0))
266 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
267 * calls pmap_mapbios() to find the RSDP, we assume that we can use
268 * pmap_mapbios() to map the RSDP.
270 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
272 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
275 printf("ACPI: Failed to map RSDP\n");
280 * For ACPI >= 2.0, use the XSDT if it is available.
281 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2
282 * in the crashdump area. Pages 0 and 1 are used to map in the
283 * headers of candidate ACPI tables.
286 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
288 * AcpiOsGetRootPointer only verifies the checksum for
289 * the version 1.0 portion of the RSDP. Version 2.0 has
290 * an additional checksum that we verify first.
292 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
294 printf("ACPI: RSDP failed extended checksum\n");
297 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);
300 printf("ACPI: Failed to map XSDT\n");
303 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
305 for (i = 0; i < count; i++)
306 if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
307 addr = xsdt->TableOffsetEntry[i];
310 acpi_unmap_table(xsdt);
312 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);
315 printf("ACPI: Failed to map RSDT\n");
318 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
320 for (i = 0; i < count; i++)
321 if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
322 addr = rsdt->TableOffsetEntry[i];
325 acpi_unmap_table(rsdt);
327 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
330 printf("ACPI: No %s table found\n", sig);
334 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr);
337 * Verify that we can map the full table and that its checksum is
340 table = map_table(addr, 0, sig);
343 acpi_unmap_table(table);
349 * ACPI nexus(4) driver.
352 nexus_acpi_probe(device_t dev)
356 error = acpi_identify();
360 return (BUS_PROBE_DEFAULT);
364 nexus_acpi_attach(device_t dev)
367 nexus_init_resources();
368 bus_generic_probe(dev);
369 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
370 panic("failed to add acpi0 device");
372 return (bus_generic_attach(dev));
375 static device_method_t nexus_acpi_methods[] = {
376 /* Device interface */
377 DEVMETHOD(device_probe, nexus_acpi_probe),
378 DEVMETHOD(device_attach, nexus_acpi_attach),
383 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
384 static devclass_t nexus_devclass;
386 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);