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>
39 #include <contrib/dev/acpica/include/acpi.h>
40 #include <contrib/dev/acpica/include/accommon.h>
41 #include <contrib/dev/acpica/include/actables.h>
43 #include <dev/acpica/acpivar.h>
45 #include <machine/nexusvar.h>
48 TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep);
49 SYSCTL_INT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep,
50 0, "Beep the PC speaker when resuming");
53 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
55 static int intr_model = ACPI_INTR_PIC;
56 static struct apm_clone_data acpi_clone;
59 acpi_machdep_init(device_t dev)
61 struct acpi_softc *sc;
63 sc = devclass_get_softc(devclass_find("acpi"), 0);
65 /* Create a fake clone for /dev/acpi. */
66 STAILQ_INIT(&sc->apm_cdevs);
67 acpi_clone.cdev = sc->acpi_dev_t;
68 acpi_clone.acpi_sc = sc;
70 STAILQ_INSERT_TAIL(&sc->apm_cdevs, &acpi_clone, entries);
72 sc->acpi_clone = &acpi_clone;
74 if (intr_model != ACPI_INTR_PIC)
75 acpi_SetIntrModel(intr_model);
77 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
78 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
79 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
80 "Call the VESA reset BIOS vector on the resume path");
86 acpi_SetDefaultIntrModel(int model)
93 acpi_machdep_quirks(int *quirks)
101 __asm __volatile("sti; hlt");
105 * Support for mapping ACPI tables during early boot. Currently this
106 * uses the crashdump map to map each table. However, the crashdump
107 * map is created in pmap_bootstrap() right after the direct map, so
108 * we should be able to just use pmap_mapbios() here instead.
110 * This makes the following assumptions about how we use this KVA:
111 * pages 0 and 1 are used to map in the header of each table found via
112 * the RSDT or XSDT and pages 2 to n are used to map in the RSDT or
113 * XSDT. This has to use 2 pages for the table headers in case a
114 * header spans a page boundary.
116 * XXX: We don't ensure the table fits in the available address space
117 * in the crashdump map.
121 * Map some memory using the crashdump map. 'offset' is an offset in
122 * pages into the crashdump map to use for the start of the mapping.
125 table_map(vm_paddr_t pa, int offset, vm_offset_t length)
130 off = pa & PAGE_MASK;
131 length = roundup(length + off, PAGE_SIZE);
133 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
134 (offset * PAGE_SIZE);
135 data = (void *)(va + off);
147 /* Unmap memory previously mapped with table_map(). */
149 table_unmap(void *data, vm_offset_t length)
153 va = (vm_offset_t)data;
154 off = va & PAGE_MASK;
155 length = roundup(length + off, PAGE_SIZE);
166 * Map a table at a given offset into the crashdump map. It first
167 * maps the header to determine the table length and then maps the
171 map_table(vm_paddr_t pa, int offset, const char *sig)
173 ACPI_TABLE_HEADER *header;
177 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
178 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
179 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
182 length = header->Length;
183 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
184 table = table_map(pa, offset, length);
185 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
187 printf("ACPI: Failed checksum for table %s\n", sig);
188 #if (ACPI_CHECKSUM_ABORT)
189 table_unmap(table, length);
197 * See if a given ACPI table is the requested table. Returns the
198 * length of the able if it matches or zero on failure.
201 probe_table(vm_paddr_t address, const char *sig)
203 ACPI_TABLE_HEADER *table;
205 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));
208 printf("ACPI: Failed to map table at 0x%jx\n",
213 printf("Table '%.4s' at 0x%jx\n", table->Signature,
216 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) {
217 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
220 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
225 * Try to map a table at a given physical address previously returned
226 * by acpi_find_table().
229 acpi_map_table(vm_paddr_t pa, const char *sig)
232 return (map_table(pa, 0, sig));
235 /* Unmap a table previously mapped via acpi_map_table(). */
237 acpi_unmap_table(void *table)
239 ACPI_TABLE_HEADER *header;
241 header = (ACPI_TABLE_HEADER *)table;
242 table_unmap(table, header->Length);
246 * Return the physical address of the requested table or zero if one
250 acpi_find_table(const char *sig)
252 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
253 ACPI_TABLE_RSDP *rsdp;
254 ACPI_TABLE_RSDT *rsdt;
255 ACPI_TABLE_XSDT *xsdt;
256 ACPI_TABLE_HEADER *table;
260 if (resource_disabled("acpi", 0))
264 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
265 * calls pmap_mapbios() to find the RSDP, we assume that we can use
266 * pmap_mapbios() to map the RSDP.
268 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
270 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
273 printf("ACPI: Failed to map RSDP\n");
278 * For ACPI >= 2.0, use the XSDT if it is available.
279 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2
280 * in the crashdump area. Pages 0 and 1 are used to map in the
281 * headers of candidate ACPI tables.
284 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
286 * AcpiOsGetRootPointer only verifies the checksum for
287 * the version 1.0 portion of the RSDP. Version 2.0 has
288 * an additional checksum that we verify first.
290 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
292 printf("ACPI: RSDP failed extended checksum\n");
295 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);
298 printf("ACPI: Failed to map XSDT\n");
301 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
303 for (i = 0; i < count; i++)
304 if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
305 addr = xsdt->TableOffsetEntry[i];
308 acpi_unmap_table(xsdt);
310 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);
313 printf("ACPI: Failed to map RSDT\n");
316 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
318 for (i = 0; i < count; i++)
319 if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
320 addr = rsdt->TableOffsetEntry[i];
323 acpi_unmap_table(rsdt);
325 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
328 printf("ACPI: No %s table found\n", sig);
332 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr);
335 * Verify that we can map the full table and that its checksum is
338 table = map_table(addr, 0, sig);
341 acpi_unmap_table(table);
347 * ACPI nexus(4) driver.
350 nexus_acpi_probe(device_t dev)
354 error = acpi_identify();
358 return (BUS_PROBE_DEFAULT);
362 nexus_acpi_attach(device_t dev)
367 nexus_init_resources();
368 bus_generic_probe(dev);
369 acpi_dev = BUS_ADD_CHILD(dev, 10, "acpi", 0);
370 if (acpi_dev == NULL)
371 panic("failed to add acpi0 device");
373 error = bus_generic_attach(dev);
375 acpi_install_wakeup_handler(device_get_softc(acpi_dev));
380 static device_method_t nexus_acpi_methods[] = {
381 /* Device interface */
382 DEVMETHOD(device_probe, nexus_acpi_probe),
383 DEVMETHOD(device_attach, nexus_acpi_attach),
388 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
389 static devclass_t nexus_devclass;
391 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);