freebsd-dev/sys/i386/acpica/acpi_machdep.c

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/*-
* 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.
*/
2003-06-02 06:16:45 +00:00
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
Rework how the nexus(4) device works on x86 to better handle the idea of different "platforms" on x86 machines. The existing code already handles having two platforms: ACPI and legacy. However, the existing approach was rather hardcoded and difficult to extend. These changes take the approach that each x86 hardware platform should provide its own nexus(4) driver (it can inherit most of its behavior from the default legacy nexus(4) driver) which is responsible for probing for the platform and performing appropriate platform-specific setup during attach (such as adding a platform-specific bus device). This does mean changing the x86 platform busses to no longer use an identify routine for probing, but to move that logic into their matching nexus(4) driver instead. - Make the default nexus(4) driver in nexus.c on i386 and amd64 handle the legacy platform. It's probe routine now returns BUS_PROBE_GENERIC so it can be overriden. - Expose a nexus_init_resources() routine which initializes the various resource managers so that subclassed nexus(4) drivers can invoke it from their attach routine. - The legacy nexus(4) driver explicitly adds a legacy0 device in its attach routine. - The ACPI driver no longer contains an new-bus identify method. Instead it exposes a public function (acpi_identify()) which is a probe routine that the MD nexus(4) drivers can use to probe for ACPI. All of the probe logic in acpi_probe() is now moved into acpi_identify() and acpi_probe() is just a stub. - On i386 and amd64, an ACPI-specific nexus(4) driver checks for ACPI via acpi_identify() and claims the nexus0 device if the probe succeeds. It then explicitly adds an acpi0 device in its attach routine. - The legacy(4) driver no longer knows anything about the acpi0 device. - On ia64 if acpi_identify() fails you basically end up with no devices. This matches the previous behavior where the old acpi_identify() would fail to add an acpi0 device again leaving you with no devices. Discussed with: imp Silence on: arch@
2008-03-13 20:39:04 +00:00
#include <sys/module.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/pmap.h>
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#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/actables.h>
2009-06-05 18:44:36 +00:00
#include <dev/acpica/acpivar.h>
Rework how the nexus(4) device works on x86 to better handle the idea of different "platforms" on x86 machines. The existing code already handles having two platforms: ACPI and legacy. However, the existing approach was rather hardcoded and difficult to extend. These changes take the approach that each x86 hardware platform should provide its own nexus(4) driver (it can inherit most of its behavior from the default legacy nexus(4) driver) which is responsible for probing for the platform and performing appropriate platform-specific setup during attach (such as adding a platform-specific bus device). This does mean changing the x86 platform busses to no longer use an identify routine for probing, but to move that logic into their matching nexus(4) driver instead. - Make the default nexus(4) driver in nexus.c on i386 and amd64 handle the legacy platform. It's probe routine now returns BUS_PROBE_GENERIC so it can be overriden. - Expose a nexus_init_resources() routine which initializes the various resource managers so that subclassed nexus(4) drivers can invoke it from their attach routine. - The legacy nexus(4) driver explicitly adds a legacy0 device in its attach routine. - The ACPI driver no longer contains an new-bus identify method. Instead it exposes a public function (acpi_identify()) which is a probe routine that the MD nexus(4) drivers can use to probe for ACPI. All of the probe logic in acpi_probe() is now moved into acpi_identify() and acpi_probe() is just a stub. - On i386 and amd64, an ACPI-specific nexus(4) driver checks for ACPI via acpi_identify() and claims the nexus0 device if the probe succeeds. It then explicitly adds an acpi0 device in its attach routine. - The legacy(4) driver no longer knows anything about the acpi0 device. - On ia64 if acpi_identify() fails you basically end up with no devices. This matches the previous behavior where the old acpi_identify() would fail to add an acpi0 device again leaving you with no devices. Discussed with: imp Silence on: arch@
2008-03-13 20:39:04 +00:00
#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);
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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)
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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);
}
void
acpi_cpu_c1()
{
__asm __volatile("sti; hlt");
}
Rework how the nexus(4) device works on x86 to better handle the idea of different "platforms" on x86 machines. The existing code already handles having two platforms: ACPI and legacy. However, the existing approach was rather hardcoded and difficult to extend. These changes take the approach that each x86 hardware platform should provide its own nexus(4) driver (it can inherit most of its behavior from the default legacy nexus(4) driver) which is responsible for probing for the platform and performing appropriate platform-specific setup during attach (such as adding a platform-specific bus device). This does mean changing the x86 platform busses to no longer use an identify routine for probing, but to move that logic into their matching nexus(4) driver instead. - Make the default nexus(4) driver in nexus.c on i386 and amd64 handle the legacy platform. It's probe routine now returns BUS_PROBE_GENERIC so it can be overriden. - Expose a nexus_init_resources() routine which initializes the various resource managers so that subclassed nexus(4) drivers can invoke it from their attach routine. - The legacy nexus(4) driver explicitly adds a legacy0 device in its attach routine. - The ACPI driver no longer contains an new-bus identify method. Instead it exposes a public function (acpi_identify()) which is a probe routine that the MD nexus(4) drivers can use to probe for ACPI. All of the probe logic in acpi_probe() is now moved into acpi_identify() and acpi_probe() is just a stub. - On i386 and amd64, an ACPI-specific nexus(4) driver checks for ACPI via acpi_identify() and claims the nexus0 device if the probe succeeds. It then explicitly adds an acpi0 device in its attach routine. - The legacy(4) driver no longer knows anything about the acpi0 device. - On ia64 if acpi_identify() fails you basically end up with no devices. This matches the previous behavior where the old acpi_identify() would fail to add an acpi0 device again leaving you with no devices. Discussed with: imp Silence on: arch@
2008-03-13 20:39:04 +00:00
/*
* 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 = pa & PG_FRAME;
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);
}
Rework how the nexus(4) device works on x86 to better handle the idea of different "platforms" on x86 machines. The existing code already handles having two platforms: ACPI and legacy. However, the existing approach was rather hardcoded and difficult to extend. These changes take the approach that each x86 hardware platform should provide its own nexus(4) driver (it can inherit most of its behavior from the default legacy nexus(4) driver) which is responsible for probing for the platform and performing appropriate platform-specific setup during attach (such as adding a platform-specific bus device). This does mean changing the x86 platform busses to no longer use an identify routine for probing, but to move that logic into their matching nexus(4) driver instead. - Make the default nexus(4) driver in nexus.c on i386 and amd64 handle the legacy platform. It's probe routine now returns BUS_PROBE_GENERIC so it can be overriden. - Expose a nexus_init_resources() routine which initializes the various resource managers so that subclassed nexus(4) drivers can invoke it from their attach routine. - The legacy nexus(4) driver explicitly adds a legacy0 device in its attach routine. - The ACPI driver no longer contains an new-bus identify method. Instead it exposes a public function (acpi_identify()) which is a probe routine that the MD nexus(4) drivers can use to probe for ACPI. All of the probe logic in acpi_probe() is now moved into acpi_identify() and acpi_probe() is just a stub. - On i386 and amd64, an ACPI-specific nexus(4) driver checks for ACPI via acpi_identify() and claims the nexus0 device if the probe succeeds. It then explicitly adds an acpi0 device in its attach routine. - The legacy(4) driver no longer knows anything about the acpi0 device. - On ia64 if acpi_identify() fails you basically end up with no devices. This matches the previous behavior where the old acpi_identify() would fail to add an acpi0 device again leaving you with no devices. Discussed with: imp Silence on: arch@
2008-03-13 20:39:04 +00:00
/*
* 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);