/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2001 Mitsuru IWASAKI
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/actables.h>
#include <dev/acpica/acpivar.h>
#include <machine/nexusvar.h>
uint32_t acpi_resume_beep;
SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RWTUN, &acpi_resume_beep,
0, "Beep the PC speaker when resuming");
uint32_t acpi_reset_video;
TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
static int intr_model = ACPI_INTR_PIC;
int
acpi_machdep_init(device_t dev)
{
struct acpi_softc *sc;
sc = device_get_softc(dev);
acpi_apm_init(sc);
acpi_install_wakeup_handler(sc);
if (intr_model == ACPI_INTR_PIC)
BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt,
INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
else
acpi_SetIntrModel(intr_model);
SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
"reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
"Call the VESA reset BIOS vector on the resume path");
return (0);
}
void
acpi_SetDefaultIntrModel(int model)
{
intr_model = model;
}
/* Check BIOS date. If 1998 or older, disable ACPI. */
int
acpi_machdep_quirks(int *quirks)
{
char *va;
int year;
/* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
va = pmap_mapbios(0xffff0, 16);
sscanf(va + 11, "%2d", &year);
pmap_unmapbios((vm_offset_t)va, 16);
/*
* Date must be >= 1/1/1999 or we don't trust ACPI. Note that this
* check must be changed by my 114th birthday.
*/
if (year > 90 && year < 99)
*quirks = ACPI_Q_BROKEN;
return (0);
}
/*
* Support for mapping ACPI tables during early boot. This abuses the
* crashdump map because the kernel cannot allocate KVA in
* pmap_mapbios() when this is used. This makes the following
* assumptions about how we use this KVA: pages 0 and 1 are used to
* map in the header of each table found via the RSDT or XSDT and
* pages 2 to n are used to map in the RSDT or XSDT. This has to use
* 2 pages for the table headers in case a header spans a page
* boundary.
*
* XXX: We don't ensure the table fits in the available address space
* in the crashdump map.
*/
/*
* Map some memory using the crashdump map. 'offset' is an offset in
* pages into the crashdump map to use for the start of the mapping.
*/
static void *
table_map(vm_paddr_t pa, int offset, vm_offset_t length)
{
vm_offset_t va, off;
void *data;
off = pa & PAGE_MASK;
length = round_page(length + off);
pa = pmap_pg_frame(pa);
va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
(offset * PAGE_SIZE);
data = (void *)(va + off);
length -= PAGE_SIZE;
while (length > 0) {
va += PAGE_SIZE;
pa += PAGE_SIZE;
length -= PAGE_SIZE;
pmap_kenter(va, pa);
invlpg(va);
}
return (data);
}
/* Unmap memory previously mapped with table_map(). */
static void
table_unmap(void *data, vm_offset_t length)
{
vm_offset_t va, off;
va = (vm_offset_t)data;
off = va & PAGE_MASK;
length = round_page(length + off);
va &= ~PAGE_MASK;
while (length > 0) {
pmap_kremove(va);
invlpg(va);
va += PAGE_SIZE;
length -= PAGE_SIZE;
}
}
/*
* Map a table at a given offset into the crashdump map. It first
* maps the header to determine the table length and then maps the
* entire table.
*/
static void *
map_table(vm_paddr_t pa, int offset, const char *sig)
{
ACPI_TABLE_HEADER *header;
vm_offset_t length;
void *table;
header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
table_unmap(header, sizeof(ACPI_TABLE_HEADER));
return (NULL);
}
length = header->Length;
table_unmap(header, sizeof(ACPI_TABLE_HEADER));
table = table_map(pa, offset, length);
if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
if (bootverbose)
printf("ACPI: Failed checksum for table %s\n", sig);
#if (ACPI_CHECKSUM_ABORT)
table_unmap(table, length);
return (NULL);
#endif
}
return (table);
}
/*
* See if a given ACPI table is the requested table. Returns the
* length of the able if it matches or zero on failure.
*/
static int
probe_table(vm_paddr_t address, const char *sig)
{
ACPI_TABLE_HEADER *table;
table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER));
if (table == NULL) {
if (bootverbose)
printf("ACPI: Failed to map table at 0x%jx\n",
(uintmax_t)address);
return (0);
}
if (bootverbose)
printf("Table '%.4s' at 0x%jx\n", table->Signature,
(uintmax_t)address);
if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) {
table_unmap(table, sizeof(ACPI_TABLE_HEADER));
return (0);
}
table_unmap(table, sizeof(ACPI_TABLE_HEADER));
return (1);
}
/*
* Try to map a table at a given physical address previously returned
* by acpi_find_table().
*/
void *
acpi_map_table(vm_paddr_t pa, const char *sig)
{
return (map_table(pa, 0, sig));
}
/* Unmap a table previously mapped via acpi_map_table(). */
void
acpi_unmap_table(void *table)
{
ACPI_TABLE_HEADER *header;
header = (ACPI_TABLE_HEADER *)table;
table_unmap(table, header->Length);
}
/*
* Return the physical address of the requested table or zero if one
* is not found.
*/
vm_paddr_t
acpi_find_table(const char *sig)
{
ACPI_PHYSICAL_ADDRESS rsdp_ptr;
ACPI_TABLE_RSDP *rsdp;
ACPI_TABLE_RSDT *rsdt;
ACPI_TABLE_XSDT *xsdt;
ACPI_TABLE_HEADER *table;
vm_paddr_t addr;
int i, count;
if (resource_disabled("acpi", 0))
return (0);
/*
* Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
* calls pmap_mapbios() to find the RSDP, we assume that we can use
* pmap_mapbios() to map the RSDP.
*/
if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
return (0);
rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
if (rsdp == NULL) {
if (bootverbose)
printf("ACPI: Failed to map RSDP\n");
return (0);
}
/*
* For ACPI >= 2.0, use the XSDT if it is available.
* Otherwise, use the RSDT. We map the XSDT or RSDT at page 2
* in the crashdump area. Pages 0 and 1 are used to map in the
* headers of candidate ACPI tables.
*/
addr = 0;
if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
/*
* AcpiOsGetRootPointer only verifies the checksum for
* the version 1.0 portion of the RSDP. Version 2.0 has
* an additional checksum that we verify first.
*/
if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
if (bootverbose)
printf("ACPI: RSDP failed extended checksum\n");
return (0);
}
xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT);
if (xsdt == NULL) {
if (bootverbose)
printf("ACPI: Failed to map XSDT\n");
return (0);
}
count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
sizeof(UINT64);
for (i = 0; i < count; i++)
if (probe_table(xsdt->TableOffsetEntry[i], sig)) {
addr = xsdt->TableOffsetEntry[i];
break;
}
acpi_unmap_table(xsdt);
} else {
rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT);
if (rsdt == NULL) {
if (bootverbose)
printf("ACPI: Failed to map RSDT\n");
return (0);
}
count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
sizeof(UINT32);
for (i = 0; i < count; i++)
if (probe_table(rsdt->TableOffsetEntry[i], sig)) {
addr = rsdt->TableOffsetEntry[i];
break;
}
acpi_unmap_table(rsdt);
}
pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
if (addr == 0) {
if (bootverbose)
printf("ACPI: No %s table found\n", sig);
return (0);
}
if (bootverbose)
printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr);
/*
* Verify that we can map the full table and that its checksum is
* correct, etc.
*/
table = map_table(addr, 0, sig);
if (table == NULL)
return (0);
acpi_unmap_table(table);
return (addr);
}
/*
* ACPI nexus(4) driver.
*/
static int
nexus_acpi_probe(device_t dev)
{
int error;
error = acpi_identify();
if (error)
return (error);
return (BUS_PROBE_DEFAULT);
}
static int
nexus_acpi_attach(device_t dev)
{
nexus_init_resources();
bus_generic_probe(dev);
if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
panic("failed to add acpi0 device");
return (bus_generic_attach(dev));
}
static device_method_t nexus_acpi_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nexus_acpi_probe),
DEVMETHOD(device_attach, nexus_acpi_attach),
{ 0, 0 }
};
DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
static devclass_t nexus_devclass;
DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);
