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>
49 uint32_t acpi_resume_beep;
50 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN, &acpi_resume_beep,
51 0, "Beep the PC speaker when resuming");
53 uint32_t acpi_reset_video;
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 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt,
70 INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
72 acpi_SetIntrModel(intr_model);
74 SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
75 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
76 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
77 "Call the VESA reset BIOS vector on the resume path");
83 acpi_SetDefaultIntrModel(int model)
89 /* Check BIOS date. If 1998 or older, disable ACPI. */
91 acpi_machdep_quirks(int *quirks)
96 /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
97 va = pmap_mapbios(0xffff0, 16);
98 sscanf(va + 11, "%2d", &year);
99 pmap_unmapbios((vm_offset_t)va, 16);
102 * Date must be >= 1/1/1999 or we don't trust ACPI. Note that this
103 * check must be changed by my 114th birthday.
105 if (year > 90 && year < 99)
106 *quirks = ACPI_Q_BROKEN;
112 * Support for mapping ACPI tables during early boot. This abuses the
113 * crashdump map because the kernel cannot allocate KVA in
114 * pmap_mapbios() when this is used. This makes the following
115 * assumptions about how we use this KVA: pages 0 and 1 are used to
116 * map in the header of each table found via the RSDT or XSDT and
117 * pages 2 to n are used to map in the RSDT or XSDT. This has to use
118 * 2 pages for the table headers in case a header spans a page
121 * XXX: We don't ensure the table fits in the available address space
122 * in the crashdump map.
126 * Map some memory using the crashdump map. 'offset' is an offset in
127 * pages into the crashdump map to use for the start of the mapping.
130 table_map(vm_paddr_t pa, int offset, vm_offset_t length)
135 off = pa & PAGE_MASK;
136 length = round_page(length + off);
137 pa = pmap_pg_frame(pa);
138 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
139 (offset * PAGE_SIZE);
140 data = (void *)(va + off);
152 /* Unmap memory previously mapped with table_map(). */
154 table_unmap(void *data, vm_offset_t length)
158 va = (vm_offset_t)data;
159 off = va & PAGE_MASK;
160 length = round_page(length + off);
171 * Map a table at a given offset into the crashdump map. It first
172 * maps the header to determine the table length and then maps the
176 map_table(vm_paddr_t pa, int offset, const char *sig)
178 ACPI_TABLE_HEADER *header;
182 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
183 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
184 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
187 length = header->Length;
188 table_unmap(header, sizeof(ACPI_TABLE_HEADER));
189 table = table_map(pa, offset, length);
190 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
192 printf("ACPI: Failed checksum for table %s\n", sig);
193 #if (ACPI_CHECKSUM_ABORT)
194 table_unmap(table, length);
202 * See if a given ACPI table is the requested table. Returns the
203 * length of the able if it matches or zero on failure.
206 probe_table(vm_paddr_t address, const char *sig)
208 ACPI_TABLE_HEADER *table;
210 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));
213 printf("ACPI: Failed to map table at 0x%jx\n",
218 printf("Table '%.4s' at 0x%jx\n", table->Signature,
221 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) {
222 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
225 table_unmap(table, sizeof(ACPI_TABLE_HEADER));
230 * Try to map a table at a given physical address previously returned
231 * by acpi_find_table().
234 acpi_map_table(vm_paddr_t pa, const char *sig)
237 return (map_table(pa, 0, sig));
240 /* Unmap a table previously mapped via acpi_map_table(). */
242 acpi_unmap_table(void *table)
244 ACPI_TABLE_HEADER *header;
246 header = (ACPI_TABLE_HEADER *)table;
247 table_unmap(table, header->Length);
251 * Return the physical address of the requested table or zero if one
255 acpi_find_table(const char *sig)
257 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
258 ACPI_TABLE_RSDP *rsdp;
259 ACPI_TABLE_RSDT *rsdt;
260 ACPI_TABLE_XSDT *xsdt;
261 ACPI_TABLE_HEADER *table;
265 if (resource_disabled("acpi", 0))
269 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
270 * calls pmap_mapbios() to find the RSDP, we assume that we can use
271 * pmap_mapbios() to map the RSDP.
273 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
275 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
278 printf("ACPI: Failed to map RSDP\n");
283 * For ACPI >= 2.0, use the XSDT if it is available.
284 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2
285 * in the crashdump area. Pages 0 and 1 are used to map in the
286 * headers of candidate ACPI tables.
289 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
291 * AcpiOsGetRootPointer only verifies the checksum for
292 * the version 1.0 portion of the RSDP. Version 2.0 has
293 * an additional checksum that we verify first.
295 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
297 printf("ACPI: RSDP failed extended checksum\n");
300 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);
303 printf("ACPI: Failed to map XSDT\n");
306 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
308 for (i = 0; i < count; i++)
309 if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
310 addr = xsdt->TableOffsetEntry[i];
313 acpi_unmap_table(xsdt);
315 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);
318 printf("ACPI: Failed to map RSDT\n");
321 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
323 for (i = 0; i < count; i++)
324 if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
325 addr = rsdt->TableOffsetEntry[i];
328 acpi_unmap_table(rsdt);
330 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
333 printf("ACPI: No %s table found\n", sig);
337 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr);
340 * Verify that we can map the full table and that its checksum is
343 table = map_table(addr, 0, sig);
346 acpi_unmap_table(table);
352 * ACPI nexus(4) driver.
355 nexus_acpi_probe(device_t dev)
359 error = acpi_identify();
363 return (BUS_PROBE_DEFAULT);
367 nexus_acpi_attach(device_t dev)
370 nexus_init_resources();
371 bus_generic_probe(dev);
372 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
373 panic("failed to add acpi0 device");
375 return (bus_generic_attach(dev));
378 static device_method_t nexus_acpi_methods[] = {
379 /* Device interface */
380 DEVMETHOD(device_probe, nexus_acpi_probe),
381 DEVMETHOD(device_attach, nexus_acpi_attach),
386 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
387 static devclass_t nexus_devclass;
389 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);