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);
67 if (intr_model != ACPI_INTR_PIC)
68 acpi_SetIntrModel(intr_model);
70 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx,
71 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
72 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
73 "Call the VESA reset BIOS vector on the resume path");
79 acpi_SetDefaultIntrModel(int model)
86 acpi_machdep_quirks(int *quirks)
93 * Support for mapping ACPI tables during early boot. Currently this
94 * uses the crashdump map to map each table. However, the crashdump
95 * map is created in pmap_bootstrap() right after the direct map, so
96 * we should be able to just use pmap_mapbios() here instead.
98 * This makes the following assumptions about how we use this KVA:
99 * pages 0 and 1 are used to map in the header of each table found via
100 * the RSDT or XSDT and pages 2 to n are used to map in the RSDT or
101 * XSDT. This has to use 2 pages for the table headers in case a
102 * header spans a page boundary.
104 * XXX: We don't ensure the table fits in the available address space
105 * in the crashdump map.
109 * Map some memory using the crashdump map. 'offset' is an offset in
110 * pages into the crashdump map to use for the start of the mapping.
113 table_map(vm_paddr_t pa, int offset, vm_offset_t length)
118 off = pa & PAGE_MASK;
119 length = round_page(length + off);
121 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
122 (offset * PAGE_SIZE);
123 data = (void *)(va + off);
135 /* Unmap memory previously mapped with table_map(). */
137 table_unmap(void *data, vm_offset_t length)
141 va = (vm_offset_t)data;
142 off = va & PAGE_MASK;
143 length = round_page(length + off);
154 * Map a table at a given offset into the crashdump map. It first
155 * maps the header to determine the table length and then maps the
159 map_table(vm_paddr_t pa, int offset, const char *sig)
161 ACPI_TABLE_HEADER *header;
165 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
166 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
167 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
170 length = header->Length;
171 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
172 table = table_map(pa, offset, length);
173 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
175 printf("ACPI: Failed checksum for table %s\n", sig);
176 #if (ACPI_CHECKSUM_ABORT)
177 table_unmap(table, length);
185 * See if a given ACPI table is the requested table. Returns the
186 * length of the able if it matches or zero on failure.
189 probe_table(vm_paddr_t address, const char *sig)
191 ACPI_TABLE_HEADER *table;
193 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));
196 printf("ACPI: Failed to map table at 0x%jx\n",
201 printf("Table '%.4s' at 0x%jx\n", table->Signature,
204 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) {
205 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
208 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
213 * Try to map a table at a given physical address previously returned
214 * by acpi_find_table().
217 acpi_map_table(vm_paddr_t pa, const char *sig)
220 return (map_table(pa, 0, sig));
223 /* Unmap a table previously mapped via acpi_map_table(). */
225 acpi_unmap_table(void *table)
227 ACPI_TABLE_HEADER *header;
229 header = (ACPI_TABLE_HEADER *)table;
230 table_unmap(table, header->Length);
234 * Return the physical address of the requested table or zero if one
238 acpi_find_table(const char *sig)
240 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
241 ACPI_TABLE_RSDP *rsdp;
242 ACPI_TABLE_RSDT *rsdt;
243 ACPI_TABLE_XSDT *xsdt;
244 ACPI_TABLE_HEADER *table;
248 if (resource_disabled("acpi", 0))
252 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
253 * calls pmap_mapbios() to find the RSDP, we assume that we can use
254 * pmap_mapbios() to map the RSDP.
256 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
258 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
261 printf("ACPI: Failed to map RSDP\n");
266 * For ACPI >= 2.0, use the XSDT if it is available.
267 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2
268 * in the crashdump area. Pages 0 and 1 are used to map in the
269 * headers of candidate ACPI tables.
272 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
274 * AcpiOsGetRootPointer only verifies the checksum for
275 * the version 1.0 portion of the RSDP. Version 2.0 has
276 * an additional checksum that we verify first.
278 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
280 printf("ACPI: RSDP failed extended checksum\n");
283 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);
286 printf("ACPI: Failed to map XSDT\n");
289 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
291 for (i = 0; i < count; i++)
292 if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
293 addr = xsdt->TableOffsetEntry[i];
296 acpi_unmap_table(xsdt);
298 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);
301 printf("ACPI: Failed to map RSDT\n");
304 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
306 for (i = 0; i < count; i++)
307 if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
308 addr = rsdt->TableOffsetEntry[i];
311 acpi_unmap_table(rsdt);
313 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
316 printf("ACPI: No %s table found\n", sig);
320 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr);
323 * Verify that we can map the full table and that its checksum is
326 table = map_table(addr, 0, sig);
329 acpi_unmap_table(table);
335 * ACPI nexus(4) driver.
338 nexus_acpi_probe(device_t dev)
342 error = acpi_identify();
346 return (BUS_PROBE_DEFAULT);
350 nexus_acpi_attach(device_t dev)
355 nexus_init_resources();
356 bus_generic_probe(dev);
357 acpi_dev = BUS_ADD_CHILD(dev, 10, "acpi", 0);
358 if (acpi_dev == NULL)
359 panic("failed to add acpi0 device");
361 error = bus_generic_attach(dev);
363 acpi_install_wakeup_handler(device_get_softc(acpi_dev));
368 static device_method_t nexus_acpi_methods[] = {
369 /* Device interface */
370 DEVMETHOD(device_probe, nexus_acpi_probe),
371 DEVMETHOD(device_attach, nexus_acpi_attach),
376 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
377 static devclass_t nexus_devclass;
379 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);