2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2001 Mitsuru IWASAKI
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/sysctl.h>
41 #include <contrib/dev/acpica/include/acpi.h>
42 #include <contrib/dev/acpica/include/accommon.h>
43 #include <contrib/dev/acpica/include/actables.h>
45 #include <dev/acpica/acpivar.h>
47 #include <machine/nexusvar.h>
50 SYSCTL_INT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN,
51 &acpi_resume_beep, 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;
59 acpi_machdep_init(device_t dev)
61 struct acpi_softc *sc;
63 sc = device_get_softc(dev);
66 acpi_install_wakeup_handler(sc);
68 if (intr_model != ACPI_INTR_PIC)
69 acpi_SetIntrModel(intr_model);
71 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx,
72 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
73 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
74 "Call the VESA reset BIOS vector on the resume path");
80 acpi_SetDefaultIntrModel(int model)
87 acpi_machdep_quirks(int *quirks)
94 * Support for mapping ACPI tables during early boot. Currently this
95 * uses the crashdump map to map each table. However, the crashdump
96 * map is created in pmap_bootstrap() right after the direct map, so
97 * we should be able to just use pmap_mapbios() here instead.
99 * This makes the following assumptions about how we use this KVA:
100 * pages 0 and 1 are used to map in the header of each table found via
101 * the RSDT or XSDT and pages 2 to n are used to map in the RSDT or
102 * XSDT. This has to use 2 pages for the table headers in case a
103 * header spans a page boundary.
105 * XXX: We don't ensure the table fits in the available address space
106 * in the crashdump map.
110 * Map some memory using the crashdump map. 'offset' is an offset in
111 * pages into the crashdump map to use for the start of the mapping.
114 table_map(vm_paddr_t pa, int offset, vm_offset_t length)
119 off = pa & PAGE_MASK;
120 length = round_page(length + off);
122 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
123 (offset * PAGE_SIZE);
124 data = (void *)(va + off);
136 /* Unmap memory previously mapped with table_map(). */
138 table_unmap(void *data, vm_offset_t length)
142 va = (vm_offset_t)data;
143 off = va & PAGE_MASK;
144 length = round_page(length + off);
155 * Map a table at a given offset into the crashdump map. It first
156 * maps the header to determine the table length and then maps the
160 map_table(vm_paddr_t pa, int offset, const char *sig)
162 ACPI_TABLE_HEADER *header;
166 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
167 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
168 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
171 length = header->Length;
172 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
173 table = table_map(pa, offset, length);
174 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
176 printf("ACPI: Failed checksum for table %s\n", sig);
177 #if (ACPI_CHECKSUM_ABORT)
178 table_unmap(table, length);
186 * See if a given ACPI table is the requested table. Returns the
187 * length of the able if it matches or zero on failure.
190 probe_table(vm_paddr_t address, const char *sig)
192 ACPI_TABLE_HEADER *table;
194 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));
197 printf("ACPI: Failed to map table at 0x%jx\n",
202 printf("Table '%.4s' at 0x%jx\n", table->Signature,
205 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) {
206 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
209 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
214 * Try to map a table at a given physical address previously returned
215 * by acpi_find_table().
218 acpi_map_table(vm_paddr_t pa, const char *sig)
221 return (map_table(pa, 0, sig));
224 /* Unmap a table previously mapped via acpi_map_table(). */
226 acpi_unmap_table(void *table)
228 ACPI_TABLE_HEADER *header;
230 header = (ACPI_TABLE_HEADER *)table;
231 table_unmap(table, header->Length);
235 * Return the physical address of the requested table or zero if one
239 acpi_find_table(const char *sig)
241 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
242 ACPI_TABLE_RSDP *rsdp;
243 ACPI_TABLE_RSDT *rsdt;
244 ACPI_TABLE_XSDT *xsdt;
245 ACPI_TABLE_HEADER *table;
249 if (resource_disabled("acpi", 0))
253 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
254 * calls pmap_mapbios() to find the RSDP, we assume that we can use
255 * pmap_mapbios() to map the RSDP.
257 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
259 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
262 printf("ACPI: Failed to map RSDP\n");
267 * For ACPI >= 2.0, use the XSDT if it is available.
268 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2
269 * in the crashdump area. Pages 0 and 1 are used to map in the
270 * headers of candidate ACPI tables.
273 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
275 * AcpiOsGetRootPointer only verifies the checksum for
276 * the version 1.0 portion of the RSDP. Version 2.0 has
277 * an additional checksum that we verify first.
279 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
281 printf("ACPI: RSDP failed extended checksum\n");
284 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);
287 printf("ACPI: Failed to map XSDT\n");
290 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
292 for (i = 0; i < count; i++)
293 if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
294 addr = xsdt->TableOffsetEntry[i];
297 acpi_unmap_table(xsdt);
299 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);
302 printf("ACPI: Failed to map RSDT\n");
305 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
307 for (i = 0; i < count; i++)
308 if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
309 addr = rsdt->TableOffsetEntry[i];
312 acpi_unmap_table(rsdt);
314 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
317 printf("ACPI: No %s table found\n", sig);
321 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr);
324 * Verify that we can map the full table and that its checksum is
327 table = map_table(addr, 0, sig);
330 acpi_unmap_table(table);
336 * ACPI nexus(4) driver.
339 nexus_acpi_probe(device_t dev)
343 error = acpi_identify();
347 return (BUS_PROBE_DEFAULT);
351 nexus_acpi_attach(device_t dev)
354 nexus_init_resources();
355 bus_generic_probe(dev);
356 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
357 panic("failed to add acpi0 device");
359 return (bus_generic_attach(dev));
362 static device_method_t nexus_acpi_methods[] = {
363 /* Device interface */
364 DEVMETHOD(device_probe, nexus_acpi_probe),
365 DEVMETHOD(device_attach, nexus_acpi_attach),
370 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
371 static devclass_t nexus_devclass;
373 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);