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/* $NetBSD: acpi.c,v 1.123 2009/01/30 12:51:03 jmcneill Exp $ */
/*-
* Copyright (c) 2003, 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum of By Noon Software, Inc.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright 2001, 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* Autoconfiguration support for the Intel ACPI Component Architecture
* ACPI reference implementation.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi.c,v 1.123 2009/01/30 12:51:03 jmcneill Exp $");
#include "opt_acpi.h"
#include "opt_pcifixup.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <dev/acpi/acpica.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpi_osd.h>
#include <dev/acpi/acpi_timer.h>
#ifdef ACPIVERBOSE
#include <dev/acpi/acpidevs_data.h>
#endif
#if defined(ACPI_PCI_FIXUP)
#error The option ACPI_PCI_FIXUP has been obsoleted by PCI_INTR_FIXUP_DISABLED. Please adjust your kernel configuration file.
#endif
#ifdef PCI_INTR_FIXUP_DISABLED
#include <dev/pci/pcidevs.h>
#endif
MALLOC_DECLARE(M_ACPI);
#include <machine/acpi_machdep.h>
#ifdef ACPI_DEBUGGER
#define ACPI_DBGR_INIT 0x01
#define ACPI_DBGR_TABLES 0x02
#define ACPI_DBGR_ENABLE 0x04
#define ACPI_DBGR_PROBE 0x08
#define ACPI_DBGR_RUNNING 0x10
static int acpi_dbgr = 0x00;
#endif
static ACPI_TABLE_DESC acpi_initial_tables[128];
static int acpi_match(device_t, struct cfdata *, void *);
static void acpi_attach(device_t, device_t, void *);
static void acpi_childdet(device_t, device_t);
static int acpi_print(void *aux, const char *);
static int sysctl_hw_acpi_sleepstate(SYSCTLFN_ARGS);
extern struct cfdriver acpi_cd;
CFATTACH_DECL2_NEW(acpi, sizeof(struct acpi_softc),
acpi_match, acpi_attach, NULL, NULL, NULL, acpi_childdet);
/*
* This is a flag we set when the ACPI subsystem is active. Machine
* dependent code may wish to skip other steps (such as attaching
* subsystems that ACPI supercedes) when ACPI is active.
*/
int acpi_active;
int acpi_force_load;
int acpi_suspended = 0;
/*
* Pointer to the ACPI subsystem's state. There can be only
* one ACPI instance.
*/
struct acpi_softc *acpi_softc;
/*
* Locking stuff.
*/
static kmutex_t acpi_slock;
static int acpi_locked;
extern kmutex_t acpi_interrupt_list_mtx;
/*
* Ignored HIDs
*/
static const char * const acpi_ignored_ids[] = {
#if defined(i386) || defined(x86_64)
"PNP0000", /* AT interrupt controller is handled internally */
"PNP0200", /* AT DMA controller is handled internally */
"PNP0A??", /* Busses aren't enumerated with ACPI yet */
"PNP0B00", /* AT RTC is handled internally */
"PNP0C01", /* No "System Board" driver */
"PNP0C02", /* No "PnP motherboard register resources" driver */
"PNP0C0F", /* ACPI PCI link devices are handled internally */
#endif
#if defined(x86_64)
"PNP0C04", /* FPU is handled internally */
#endif
NULL
};
/*
* sysctl-related information
*/
static uint64_t acpi_root_pointer; /* found as hw.acpi.root */
static int acpi_sleepstate = ACPI_STATE_S0;
static char acpi_supported_states[3 * 6 + 1] = "";
/*
* Prototypes.
*/
static void acpi_build_tree(struct acpi_softc *);
static ACPI_STATUS acpi_make_devnode(ACPI_HANDLE, UINT32, void *, void **);
static void acpi_enable_fixed_events(struct acpi_softc *);
static ACPI_TABLE_HEADER *acpi_map_rsdt(void);
static void acpi_unmap_rsdt(ACPI_TABLE_HEADER *);
static int is_available_state(struct acpi_softc *, int);
static bool acpi_suspend(device_t PMF_FN_PROTO);
static bool acpi_resume(device_t PMF_FN_PROTO);
/*
* acpi_probe:
*
* Probe for ACPI support. This is called by the
* machine-dependent ACPI front-end. All of the
* actual work is done by ACPICA.
*
* NOTE: This is not an autoconfiguration interface function.
*/
int
acpi_probe(void)
{
static int beenhere;
ACPI_TABLE_HEADER *rsdt;
ACPI_STATUS rv;
if (beenhere != 0)
panic("acpi_probe: ACPI has already been probed");
beenhere = 1;
mutex_init(&acpi_slock, MUTEX_DEFAULT, IPL_NONE);
mutex_init(&acpi_interrupt_list_mtx, MUTEX_DEFAULT, IPL_NONE);
acpi_locked = 0;
/*
* Start up ACPICA.
*/
#ifdef ACPI_DEBUGGER
if (acpi_dbgr & ACPI_DBGR_INIT)
acpi_osd_debugger();
#endif
AcpiGbl_AllMethodsSerialized = FALSE;
AcpiGbl_EnableInterpreterSlack = TRUE;
rv = AcpiInitializeSubsystem();
if (ACPI_FAILURE(rv)) {
printf("ACPI: unable to initialize ACPICA: %s\n",
AcpiFormatException(rv));
return 0;
}
rv = AcpiInitializeTables(acpi_initial_tables, 128, 0);
if (ACPI_FAILURE(rv)) {
printf("ACPI: unable to initialize ACPI tables: %s\n",
AcpiFormatException(rv));
return 0;
}
rv = AcpiReallocateRootTable();
if (ACPI_FAILURE(rv)) {
printf("ACPI: unable to reallocate root table: %s\n",
AcpiFormatException(rv));
return 0;
}
#ifdef ACPI_DEBUGGER
if (acpi_dbgr & ACPI_DBGR_TABLES)
acpi_osd_debugger();
#endif
rv = AcpiLoadTables();
if (ACPI_FAILURE(rv)) {
printf("ACPI: unable to load tables: %s\n",
AcpiFormatException(rv));
return 0;
}
rsdt = acpi_map_rsdt();
if (rsdt == NULL) {
printf("ACPI: unable to map RSDT\n");
return 0;
}
if (!acpi_force_load && (acpi_find_quirks() & ACPI_QUIRK_BROKEN)) {
printf("ACPI: BIOS implementation in listed as broken:\n");
printf("ACPI: X/RSDT: OemId <%6.6s,%8.8s,%08x>, "
"AslId <%4.4s,%08x>\n",
rsdt->OemId, rsdt->OemTableId,
rsdt->OemRevision,
rsdt->AslCompilerId,
rsdt->AslCompilerRevision);
printf("ACPI: not used. set acpi_force_load to use anyway.\n");
acpi_unmap_rsdt(rsdt);
return 0;
}
acpi_unmap_rsdt(rsdt);
#if notyet
/* Install the default address space handlers. */
rv = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL);
if (ACPI_FAILURE(rv)) {
printf("ACPI: unable to initialise SystemMemory handler: %s\n",
AcpiFormatException(rv));
return 0;
}
rv = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL);
if (ACPI_FAILURE(rv)) {
printf("ACPI: unable to initialise SystemIO handler: %s\n",
AcpiFormatException(rv));
return 0;
}
rv = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
if (ACPI_FAILURE(rv)) {
printf("ACPI: unabled to initialise PciConfig handler: %s\n",
AcpiFormatException(rv));
return 0;
}
#endif
rv = AcpiEnableSubsystem(~(ACPI_NO_HARDWARE_INIT|ACPI_NO_ACPI_ENABLE));
if (ACPI_FAILURE(rv)) {
printf("ACPI: unable to enable: %s\n", AcpiFormatException(rv));
return 0;
}
/*
* Looks like we have ACPI!
*/
return 1;
}
static int
acpi_submatch(device_t parent, cfdata_t cf, const int *locs, void *aux)
{
struct cfattach *ca;
ca = config_cfattach_lookup(cf->cf_name, cf->cf_atname);
return (ca == &acpi_ca);
}
int
acpi_check(device_t parent, const char *ifattr)
{
return (config_search_ia(acpi_submatch, parent, ifattr, NULL) != NULL);
}
ACPI_PHYSICAL_ADDRESS
acpi_OsGetRootPointer(void)
{
ACPI_PHYSICAL_ADDRESS PhysicalAddress;
/*
* IA-32: Use AcpiFindRootPointer() to locate the RSDP.
*
* IA-64: Use the EFI.
*
* We let MD code handle this since there are multiple
* ways to do it.
*/
PhysicalAddress = acpi_md_OsGetRootPointer();
if (acpi_root_pointer == 0)
acpi_root_pointer = PhysicalAddress;
return PhysicalAddress;
}
/*
* acpi_match:
*
* Autoconfiguration `match' routine.
*/
static int
acpi_match(device_t parent, struct cfdata *match, void *aux)
{
/*
* XXX Check other locators? Hard to know -- machine
* dependent code has already checked for the presence
* of ACPI by calling acpi_probe(), so I suppose we
* don't really have to do anything else.
*/
return 1;
}
/* Remove references to child devices.
*
* XXX Need to reclaim any resources?
*/
static void
acpi_childdet(device_t self, device_t child)
{
struct acpi_softc *sc = device_private(self);
struct acpi_scope *as;
struct acpi_devnode *ad;
TAILQ_FOREACH(as, &sc->sc_scopes, as_list) {
TAILQ_FOREACH(ad, &as->as_devnodes, ad_list) {
if (ad->ad_device == child)
ad->ad_device = NULL;
}
}
}
/*
* acpi_attach:
*
* Autoconfiguration `attach' routine. Finish initializing
* ACPICA (some initialization was done in acpi_probe(),
* which was required to check for the presence of ACPI),
* and enable the ACPI subsystem.
*/
static void
acpi_attach(device_t parent, device_t self, void *aux)
{
struct acpi_softc *sc = device_private(self);
struct acpibus_attach_args *aa = aux;
ACPI_STATUS rv;
ACPI_TABLE_HEADER *rsdt;
aprint_naive("\n");
aprint_normal(": Intel ACPICA %08x\n", ACPI_CA_VERSION);
if (acpi_softc != NULL)
panic("acpi_attach: ACPI has already been attached");
sysmon_power_settype("acpi");
rsdt = acpi_map_rsdt();
if (rsdt) {
aprint_verbose_dev(
self,
"X/RSDT: OemId <%6.6s,%8.8s,%08x>, AslId <%4.4s,%08x>\n",
rsdt->OemId, rsdt->OemTableId,
rsdt->OemRevision,
rsdt->AslCompilerId, rsdt->AslCompilerRevision);
} else
aprint_error_dev(self, "X/RSDT: Not found\n");
acpi_unmap_rsdt(rsdt);
sc->sc_dev = self;
sc->sc_quirks = acpi_find_quirks();
sc->sc_iot = aa->aa_iot;
sc->sc_memt = aa->aa_memt;
sc->sc_pc = aa->aa_pc;
sc->sc_pciflags = aa->aa_pciflags;
sc->sc_ic = aa->aa_ic;
acpi_softc = sc;
/*
* Register null power management handler
*/
if (!pmf_device_register(self, acpi_suspend, acpi_resume))
aprint_error_dev(self, "couldn't establish power handler\n");
/*
* Bring ACPI on-line.
*/
#ifdef ACPI_DEBUGGER
if (acpi_dbgr & ACPI_DBGR_ENABLE)
acpi_osd_debugger();
#endif
#define ACPI_ENABLE_PHASE1 \
(ACPI_NO_HANDLER_INIT | ACPI_NO_EVENT_INIT)
#define ACPI_ENABLE_PHASE2 \
(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE | \
ACPI_NO_ADDRESS_SPACE_INIT)
rv = AcpiEnableSubsystem(ACPI_ENABLE_PHASE1);
if (ACPI_FAILURE(rv)) {
aprint_error_dev(self, "unable to enable ACPI: %s\n",
AcpiFormatException(rv));
return;
}
acpi_md_callback();
rv = AcpiEnableSubsystem(ACPI_ENABLE_PHASE2);
if (ACPI_FAILURE(rv)) {
aprint_error_dev(self, "unable to enable ACPI: %s\n",
AcpiFormatException(rv));
return;
}
/* early EC handler initialization if ECDT table is available */
config_found_ia(self, "acpiecdtbus", NULL, NULL);
rv = AcpiInitializeObjects(ACPI_FULL_INITIALIZATION);
if (ACPI_FAILURE(rv)) {
aprint_error_dev(self,
"unable to initialize ACPI objects: %s\n",
AcpiFormatException(rv));
return;
}
acpi_active = 1;
/* Our current state is "awake". */
sc->sc_sleepstate = ACPI_STATE_S0;
/* Show SCI interrupt. */
aprint_verbose_dev(self, "SCI interrupting at int %d\n",
AcpiGbl_FADT.SciInterrupt);
/*
* Check for fixed-hardware features.
*/
acpi_enable_fixed_events(sc);
acpitimer_init();
/*
* Scan the namespace and build our device tree.
*/
#ifdef ACPI_DEBUGGER
if (acpi_dbgr & ACPI_DBGR_PROBE)
acpi_osd_debugger();
#endif
acpi_build_tree(sc);
sprintf(acpi_supported_states, "%s%s%s%s%s%s",
is_available_state(sc, ACPI_STATE_S0) ? "S0 " : "",
is_available_state(sc, ACPI_STATE_S1) ? "S1 " : "",
is_available_state(sc, ACPI_STATE_S2) ? "S2 " : "",
is_available_state(sc, ACPI_STATE_S3) ? "S3 " : "",
is_available_state(sc, ACPI_STATE_S4) ? "S4 " : "",
is_available_state(sc, ACPI_STATE_S5) ? "S5 " : "");
#ifdef ACPI_DEBUGGER
if (acpi_dbgr & ACPI_DBGR_RUNNING)
acpi_osd_debugger();
#endif
}
static bool
acpi_suspend(device_t dv PMF_FN_ARGS)
{
acpi_suspended = 1;
return true;
}
static bool
acpi_resume(device_t dv PMF_FN_ARGS)
{
acpi_suspended = 0;
return true;
}
#if 0
/*
* acpi_disable:
*
* Disable ACPI.
*/
static ACPI_STATUS
acpi_disable(struct acpi_softc *sc)
{
ACPI_STATUS rv = AE_OK;
if (acpi_active) {
rv = AcpiDisable();
if (ACPI_SUCCESS(rv))
acpi_active = 0;
}
return rv;
}
#endif
struct acpi_make_devnode_state {
struct acpi_softc *softc;
struct acpi_scope *scope;
};
/*
* acpi_build_tree:
*
* Scan relevant portions of the ACPI namespace and attach
* child devices.
*/
static void
acpi_build_tree(struct acpi_softc *sc)
{
static const char *scopes[] = {
"\\_PR_", /* ACPI 1.0 processor namespace */
"\\_SB_", /* system bus namespace */
"\\_SI_", /* system indicator namespace */
"\\_TZ_", /* ACPI 1.0 thermal zone namespace */
NULL,
};
struct acpi_attach_args aa;
struct acpi_make_devnode_state state;
struct acpi_scope *as;
struct acpi_devnode *ad;
ACPI_HANDLE parent;
ACPI_STATUS rv;
int i;
TAILQ_INIT(&sc->sc_scopes);
state.softc = sc;
/*
* Scan the namespace and build our tree.
*/
for (i = 0; scopes[i] != NULL; i++) {
as = malloc(sizeof(*as), M_ACPI, M_WAITOK);
as->as_name = scopes[i];
TAILQ_INIT(&as->as_devnodes);
TAILQ_INSERT_TAIL(&sc->sc_scopes, as, as_list);
state.scope = as;
rv = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i],
&parent);
if (ACPI_SUCCESS(rv)) {
AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100,
acpi_make_devnode, &state, NULL);
}
/* Now, for this namespace, try and attach the devices. */
TAILQ_FOREACH(ad, &as->as_devnodes, ad_list) {
aa.aa_node = ad;
aa.aa_iot = sc->sc_iot;
aa.aa_memt = sc->sc_memt;
aa.aa_pc = sc->sc_pc;
aa.aa_pciflags = sc->sc_pciflags;
aa.aa_ic = sc->sc_ic;
if (ad->ad_devinfo->Type == ACPI_TYPE_DEVICE) {
/*
* XXX We only attach devices which are:
*
* - present
* - enabled
* - functioning properly
*
* However, if enabled, it's decoding resources,
* so we should claim them, if possible.
* Requires changes to bus_space(9).
*/
if ((ad->ad_devinfo->Valid & ACPI_VALID_STA) ==
ACPI_VALID_STA &&
(ad->ad_devinfo->CurrentStatus &
(ACPI_STA_DEV_PRESENT|ACPI_STA_DEV_ENABLED|
ACPI_STA_DEV_OK)) !=
(ACPI_STA_DEV_PRESENT|ACPI_STA_DEV_ENABLED|
ACPI_STA_DEV_OK))
continue;
}
/*
* XXX Same problem as above...
*
* Do this check only for devices, as e.g.
* a Thermal Zone doesn't have a HID.
*/
if (ad->ad_devinfo->Type == ACPI_TYPE_DEVICE &&
(ad->ad_devinfo->Valid & ACPI_VALID_HID) == 0)
continue;
/*
* Handled internally
*/
if (ad->ad_devinfo->Type == ACPI_TYPE_PROCESSOR ||
ad->ad_devinfo->Type == ACPI_TYPE_POWER)
continue;
/*
* Skip ignored HIDs
*/
if (acpi_match_hid(ad->ad_devinfo, acpi_ignored_ids))
continue;
ad->ad_device = config_found_ia(sc->sc_dev,
"acpinodebus", &aa, acpi_print);
}
}
config_found_ia(sc->sc_dev, "acpiapmbus", NULL, NULL);
}
#ifdef ACPI_ACTIVATE_DEV
static void
acpi_activate_device(ACPI_HANDLE handle, ACPI_DEVICE_INFO **di)
{
ACPI_STATUS rv;
ACPI_BUFFER buf;
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
#ifdef ACPI_DEBUG
aprint_normal("acpi_activate_device: %s, old status=%x\n",
(*di)->HardwareId.Value, (*di)->CurrentStatus);
#endif
rv = acpi_allocate_resources(handle);
if (ACPI_FAILURE(rv)) {
aprint_error("acpi: activate failed for %s\n",
(*di)->HardwareId.Value);
} else {
aprint_verbose("acpi: activated %s\n",
(*di)->HardwareId.Value);
}
(void)AcpiGetObjectInfo(handle, &buf);
AcpiOsFree(*di);
*di = buf.Pointer;
#ifdef ACPI_DEBUG
aprint_normal("acpi_activate_device: %s, new status=%x\n",
(*di)->HardwareId.Value, (*di)->CurrentStatus);
#endif
}
#endif /* ACPI_ACTIVATE_DEV */
/*
* acpi_make_devnode:
*
* Make an ACPI devnode.
*/
static ACPI_STATUS
acpi_make_devnode(ACPI_HANDLE handle, UINT32 level, void *context,
void **status)
{
struct acpi_make_devnode_state *state = context;
#if defined(ACPI_DEBUG) || defined(ACPI_EXTRA_DEBUG)
struct acpi_softc *sc = state->softc;
#endif
struct acpi_scope *as = state->scope;
struct acpi_devnode *ad;
ACPI_OBJECT_TYPE type;
ACPI_BUFFER buf;
ACPI_DEVICE_INFO *devinfo;
ACPI_STATUS rv;
ACPI_NAME_UNION *anu;
int i, clear = 0;
rv = AcpiGetType(handle, &type);
if (ACPI_SUCCESS(rv)) {
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
rv = AcpiGetObjectInfo(handle, &buf);
if (ACPI_FAILURE(rv)) {
#ifdef ACPI_DEBUG
aprint_normal_dev(sc->sc_dev,
"AcpiGetObjectInfo failed: %s\n",
AcpiFormatException(rv));
#endif
goto out; /* XXX why return OK */
}
devinfo = buf.Pointer;
switch (type) {
case ACPI_TYPE_DEVICE:
#ifdef ACPI_ACTIVATE_DEV
if ((devinfo->Valid & (ACPI_VALID_STA|ACPI_VALID_HID)) ==
(ACPI_VALID_STA|ACPI_VALID_HID) &&
(devinfo->CurrentStatus &
(ACPI_STA_DEV_PRESENT|ACPI_STA_DEV_ENABLED)) ==
ACPI_STA_DEV_PRESENT)
acpi_activate_device(handle, &devinfo);
/* FALLTHROUGH */
#endif
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
case ACPI_TYPE_POWER:
ad = malloc(sizeof(*ad), M_ACPI, M_NOWAIT|M_ZERO);
if (ad == NULL)
return AE_NO_MEMORY;
ad->ad_devinfo = devinfo;
ad->ad_handle = handle;
ad->ad_level = level;
ad->ad_scope = as;
ad->ad_type = type;
anu = (ACPI_NAME_UNION *)&devinfo->Name;
ad->ad_name[4] = '\0';
for (i = 3, clear = 0; i >= 0; i--) {
if (!clear && anu->Ascii[i] == '_')
ad->ad_name[i] = '\0';
else {
ad->ad_name[i] = anu->Ascii[i];
clear = 1;
}
}
if (ad->ad_name[0] == '\0')
ad->ad_name[0] = '_';
TAILQ_INSERT_TAIL(&as->as_devnodes, ad, ad_list);
if (type == ACPI_TYPE_DEVICE &&
(ad->ad_devinfo->Valid & ACPI_VALID_HID) == 0)
goto out;
#ifdef ACPI_EXTRA_DEBUG
aprint_normal_dev(sc->sc_dev,
"HID %s found in scope %s level %d\n",
ad->ad_devinfo->HardwareId.Value,
as->as_name, ad->ad_level);
if (ad->ad_devinfo->Valid & ACPI_VALID_UID)
aprint_normal(" UID %s\n",
ad->ad_devinfo->UniqueId.Value);
if (ad->ad_devinfo->Valid & ACPI_VALID_ADR)
aprint_normal(" ADR 0x%016" PRIx64 "\n",
ad->ad_devinfo->Address);
if (ad->ad_devinfo->Valid & ACPI_VALID_STA)
aprint_normal(" STA 0x%08x\n",
ad->ad_devinfo->CurrentStatus);
#endif
}
}
out:
return AE_OK;
}
/*
* acpi_print:
*
* Autoconfiguration print routine for ACPI node bus.
*/
static int
acpi_print(void *aux, const char *pnp)
{
struct acpi_attach_args *aa = aux;
ACPI_STATUS rv;
if (pnp) {
if (aa->aa_node->ad_devinfo->Valid & ACPI_VALID_HID) {
char *pnpstr =
aa->aa_node->ad_devinfo->HardwareId.Value;
ACPI_BUFFER buf;
aprint_normal("%s (%s) ", aa->aa_node->ad_name,
pnpstr);
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
rv = AcpiEvaluateObject(aa->aa_node->ad_handle,
"_STR", NULL, &buf);
if (ACPI_SUCCESS(rv)) {
ACPI_OBJECT *obj = buf.Pointer;
switch (obj->Type) {
case ACPI_TYPE_STRING:
aprint_normal("[%s] ", obj->String.Pointer);
break;
case ACPI_TYPE_BUFFER:
aprint_normal("buffer %p ", obj->Buffer.Pointer);
break;
default:
aprint_normal("type %d ",obj->Type);
break;
}
AcpiOsFree(buf.Pointer);
}
#ifdef ACPIVERBOSE
else {
int i;
for (i = 0; i < sizeof(acpi_knowndevs) /
sizeof(acpi_knowndevs[0]); i++) {
if (strcmp(acpi_knowndevs[i].pnp,
pnpstr) == 0) {
aprint_normal("[%s] ",
acpi_knowndevs[i].str);
}
}
}
#endif
aprint_normal("at %s", pnp);
} else if (aa->aa_node->ad_devinfo->Type != ACPI_TYPE_DEVICE) {
aprint_normal("%s (ACPI Object Type '%s' "
"[0x%02x]) ", aa->aa_node->ad_name,
AcpiUtGetTypeName(aa->aa_node->ad_devinfo->Type),
aa->aa_node->ad_devinfo->Type);
aprint_normal("at %s", pnp);
} else
return 0;
} else {
aprint_normal(" (%s", aa->aa_node->ad_name);
if (aa->aa_node->ad_devinfo->Valid & ACPI_VALID_HID) {
aprint_normal(", %s", aa->aa_node->ad_devinfo->HardwareId.Value);
if (aa->aa_node->ad_devinfo->Valid & ACPI_VALID_UID) {
const char *uid;
uid = aa->aa_node->ad_devinfo->UniqueId.Value;
if (uid[0] == '\0')
uid = "<null>";
aprint_normal("-%s", uid);
}
}
aprint_normal(")");
}
return UNCONF;
}
/*****************************************************************************
* ACPI fixed-hardware feature handlers
*****************************************************************************/
static UINT32 acpi_fixed_button_handler(void *);
static void acpi_fixed_button_pressed(void *);
/*
* acpi_enable_fixed_events:
*
* Enable any fixed-hardware feature handlers.
*/
static void
acpi_enable_fixed_events(struct acpi_softc *sc)
{
static int beenhere;
ACPI_STATUS rv;
KASSERT(beenhere == 0);
beenhere = 1;
/*
* Check for fixed-hardware buttons.
*/
if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
aprint_verbose_dev(sc->sc_dev,
"fixed-feature power button present\n");
sc->sc_smpsw_power.smpsw_name = device_xname(sc->sc_dev);
sc->sc_smpsw_power.smpsw_type = PSWITCH_TYPE_POWER;
if (sysmon_pswitch_register(&sc->sc_smpsw_power) != 0) {
aprint_error_dev(sc->sc_dev,
"unable to register fixed power "
"button with sysmon\n");
} else {
rv = AcpiInstallFixedEventHandler(
ACPI_EVENT_POWER_BUTTON,
acpi_fixed_button_handler, &sc->sc_smpsw_power);
if (ACPI_FAILURE(rv)) {
aprint_error_dev(sc->sc_dev,
"unable to install handler "
"for fixed power button: %s\n",
AcpiFormatException(rv));
}
}
}
if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
aprint_verbose_dev(sc->sc_dev,
"fixed-feature sleep button present\n");
sc->sc_smpsw_sleep.smpsw_name = device_xname(sc->sc_dev);
sc->sc_smpsw_sleep.smpsw_type = PSWITCH_TYPE_SLEEP;
if (sysmon_pswitch_register(&sc->sc_smpsw_power) != 0) {
aprint_error_dev(sc->sc_dev,
"unable to register fixed sleep "
"button with sysmon\n");
} else {
rv = AcpiInstallFixedEventHandler(
ACPI_EVENT_SLEEP_BUTTON,
acpi_fixed_button_handler, &sc->sc_smpsw_sleep);
if (ACPI_FAILURE(rv)) {
aprint_error_dev(sc->sc_dev,
"unable to install handler "
"for fixed sleep button: %s\n",
AcpiFormatException(rv));
}
}
}
}
/*
* acpi_fixed_button_handler:
*
* Event handler for the fixed buttons.
*/
static UINT32
acpi_fixed_button_handler(void *context)
{
struct sysmon_pswitch *smpsw = context;
int rv;
#ifdef ACPI_BUT_DEBUG
printf("%s: fixed button handler\n", smpsw->smpsw_name);
#endif
rv = AcpiOsExecute(OSL_NOTIFY_HANDLER,
acpi_fixed_button_pressed, smpsw);
if (ACPI_FAILURE(rv))
printf("%s: WARNING: unable to queue fixed button pressed "
"callback: %s\n", smpsw->smpsw_name,
AcpiFormatException(rv));
return ACPI_INTERRUPT_HANDLED;
}
/*
* acpi_fixed_button_pressed:
*
* Deal with a fixed button being pressed.
*/
static void
acpi_fixed_button_pressed(void *context)
{
struct sysmon_pswitch *smpsw = context;
#ifdef ACPI_BUT_DEBUG
printf("%s: fixed button pressed, calling sysmon\n",
smpsw->smpsw_name);
#endif
sysmon_pswitch_event(smpsw, PSWITCH_EVENT_PRESSED);
}
/*****************************************************************************
* ACPI utility routines.
*****************************************************************************/
/*
* acpi_eval_integer:
*
* Evaluate an integer object.
*/
ACPI_STATUS
acpi_eval_integer(ACPI_HANDLE handle, const char *path, ACPI_INTEGER *valp)
{
ACPI_STATUS rv;
ACPI_BUFFER buf;
ACPI_OBJECT param;
if (handle == NULL)
handle = ACPI_ROOT_OBJECT;
buf.Pointer = &param;
buf.Length = sizeof(param);
rv = AcpiEvaluateObjectTyped(handle, path, NULL, &buf, ACPI_TYPE_INTEGER);
if (ACPI_SUCCESS(rv))
*valp = param.Integer.Value;
return rv;
}
/*
* acpi_eval_string:
*
* Evaluate a (Unicode) string object.
*/
ACPI_STATUS
acpi_eval_string(ACPI_HANDLE handle, const char *path, char **stringp)
{
ACPI_STATUS rv;
ACPI_BUFFER buf;
if (handle == NULL)
handle = ACPI_ROOT_OBJECT;
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
rv = AcpiEvaluateObjectTyped(handle, path, NULL, &buf, ACPI_TYPE_STRING);
if (ACPI_SUCCESS(rv)) {
ACPI_OBJECT *param = buf.Pointer;
const char *ptr = param->String.Pointer;
size_t len = param->String.Length;
if ((*stringp = AcpiOsAllocate(len)) == NULL)
rv = AE_NO_MEMORY;
else
(void)memcpy(*stringp, ptr, len);
AcpiOsFree(param);
}
return rv;
}
/*
* acpi_eval_struct:
*
* Evaluate a more complex structure.
* Caller must free buf.Pointer by AcpiOsFree().
*/
ACPI_STATUS
acpi_eval_struct(ACPI_HANDLE handle, const char *path, ACPI_BUFFER *bufp)
{
ACPI_STATUS rv;
if (handle == NULL)
handle = ACPI_ROOT_OBJECT;
bufp->Pointer = NULL;
bufp->Length = ACPI_ALLOCATE_BUFFER;
rv = AcpiEvaluateObject(handle, path, NULL, bufp);
return rv;
}
/*
* acpi_foreach_package_object:
*
* Iterate over all objects in a in a packages and pass then all
* to a function. If the called function returns non AE_OK, the
* iteration is stopped and that value is returned.
*/
ACPI_STATUS
acpi_foreach_package_object(ACPI_OBJECT *pkg,
ACPI_STATUS (*func)(ACPI_OBJECT *, void *),
void *arg)
{
ACPI_STATUS rv = AE_OK;
int i;
if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
return AE_BAD_PARAMETER;
for (i = 0; i < pkg->Package.Count; i++) {
rv = (*func)(&pkg->Package.Elements[i], arg);
if (ACPI_FAILURE(rv))
break;
}
return rv;
}
const char *
acpi_name(ACPI_HANDLE handle)
{
static char buffer[80];
ACPI_BUFFER buf;
ACPI_STATUS rv;
buf.Length = sizeof(buffer);
buf.Pointer = buffer;
rv = AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf);
if (ACPI_FAILURE(rv))
return "(unknown acpi path)";
return buffer;
}
/*
* acpi_get:
*
* Fetch data info the specified (empty) ACPI buffer.
* Caller must free buf.Pointer by AcpiOsFree().
*/
ACPI_STATUS
acpi_get(ACPI_HANDLE handle, ACPI_BUFFER *buf,
ACPI_STATUS (*getit)(ACPI_HANDLE, ACPI_BUFFER *))
{
buf->Pointer = NULL;
buf->Length = ACPI_ALLOCATE_BUFFER;
return (*getit)(handle, buf);
}
/*
* acpi_match_hid
*
* Match given ids against _HID and _CIDs
*/
int
acpi_match_hid(ACPI_DEVICE_INFO *ad, const char * const *ids)
{
int i;
while (*ids) {
if (ad->Valid & ACPI_VALID_HID) {
if (pmatch(ad->HardwareId.Value, *ids, NULL) == 2)
return 1;
}
if (ad->Valid & ACPI_VALID_CID) {
for (i = 0; i < ad->CompatibilityId.Count; i++) {
if (pmatch(ad->CompatibilityId.Id[i].Value, *ids, NULL) == 2)
return 1;
}
}
ids++;
}
return 0;
}
/*
* acpi_wake_gpe_helper
*
* Set/unset GPE as both Runtime and Wake
*/
static void
acpi_wake_gpe_helper(ACPI_HANDLE handle, bool enable)
{
ACPI_BUFFER buf;
ACPI_STATUS rv;
ACPI_OBJECT *p, *elt;
rv = acpi_eval_struct(handle, METHOD_NAME__PRW, &buf);
if (ACPI_FAILURE(rv))
return; /* just ignore */
p = buf.Pointer;
if (p->Type != ACPI_TYPE_PACKAGE || p->Package.Count < 2)
goto out; /* just ignore */
elt = p->Package.Elements;
/* TBD: package support */
if (enable) {
AcpiSetGpeType(NULL, elt[0].Integer.Value,
ACPI_GPE_TYPE_WAKE_RUN);
AcpiEnableGpe(NULL, elt[0].Integer.Value, ACPI_NOT_ISR);
} else
AcpiDisableGpe(NULL, elt[0].Integer.Value, ACPI_NOT_ISR);
out:
AcpiOsFree(buf.Pointer);
}
/*
* acpi_clear_wake_gpe
*
* Clear GPE as both Runtime and Wake
*/
void
acpi_clear_wake_gpe(ACPI_HANDLE handle)
{
acpi_wake_gpe_helper(handle, false);
}
/*
* acpi_set_wake_gpe
*
* Set GPE as both Runtime and Wake
*/
void
acpi_set_wake_gpe(ACPI_HANDLE handle)
{
acpi_wake_gpe_helper(handle, true);
}
/*****************************************************************************
* ACPI sleep support.
*****************************************************************************/
static int
is_available_state(struct acpi_softc *sc, int state)
{
UINT8 type_a, type_b;
return ACPI_SUCCESS(AcpiGetSleepTypeData((UINT8)state,
&type_a, &type_b));
}
/*
* acpi_enter_sleep_state:
*
* enter to the specified sleep state.
*/
ACPI_STATUS
acpi_enter_sleep_state(struct acpi_softc *sc, int state)
{
int err;
ACPI_STATUS ret = AE_OK;
if (state == acpi_sleepstate)
return AE_OK;
aprint_normal_dev(sc->sc_dev, "entering state %d\n", state);
switch (state) {
case ACPI_STATE_S0:
break;
case ACPI_STATE_S1:
case ACPI_STATE_S2:
case ACPI_STATE_S3:
case ACPI_STATE_S4:
if (!is_available_state(sc, state)) {
aprint_error_dev(sc->sc_dev,
"ACPI S%d not available on this platform\n", state);
break;
}
if (state != ACPI_STATE_S1 && !pmf_system_suspend(PMF_F_NONE)) {
aprint_error_dev(sc->sc_dev, "aborting suspend\n");
break;
}
ret = AcpiEnterSleepStatePrep(state);
if (ACPI_FAILURE(ret)) {
aprint_error_dev(sc->sc_dev,
"failed preparing to sleep (%s)\n",
AcpiFormatException(ret));
break;
}
acpi_sleepstate = state;
if (state == ACPI_STATE_S1) {
/* just enter the state */
acpi_md_OsDisableInterrupt();
ret = AcpiEnterSleepState((UINT8)state);
if (ACPI_FAILURE(ret))
aprint_error_dev(sc->sc_dev,
"failed to enter sleep state S1: %s\n",
AcpiFormatException(ret));
AcpiLeaveSleepState((UINT8)state);
} else {
err = acpi_md_sleep(state);
if (state == ACPI_STATE_S4)
AcpiEnable();
pmf_system_bus_resume(PMF_F_NONE);
AcpiLeaveSleepState((UINT8)state);
pmf_system_resume(PMF_F_NONE);
}
break;
case ACPI_STATE_S5:
ret = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
if (ACPI_FAILURE(ret)) {
aprint_error_dev(sc->sc_dev,
"failed preparing to sleep (%s)\n",
AcpiFormatException(ret));
break;
}
DELAY(1000000);
acpi_sleepstate = state;
acpi_md_OsDisableInterrupt();
AcpiEnterSleepState(ACPI_STATE_S5);
aprint_error_dev(sc->sc_dev, "WARNING powerdown failed!\n");
break;
}
acpi_sleepstate = ACPI_STATE_S0;
return ret;
}
#if defined(ACPI_ACTIVATE_DEV)
/* XXX This very incomplete */
ACPI_STATUS
acpi_allocate_resources(ACPI_HANDLE handle)
{
ACPI_BUFFER bufp, bufc, bufn;
ACPI_RESOURCE *resp, *resc, *resn;
ACPI_RESOURCE_IRQ *irq;
ACPI_RESOURCE_EXTENDED_IRQ *xirq;
ACPI_STATUS rv;
uint delta;
rv = acpi_get(handle, &bufp, AcpiGetPossibleResources);
if (ACPI_FAILURE(rv))
goto out;
rv = acpi_get(handle, &bufc, AcpiGetCurrentResources);
if (ACPI_FAILURE(rv)) {
goto out1;
}
bufn.Length = 1000;
bufn.Pointer = resn = malloc(bufn.Length, M_ACPI, M_WAITOK);
resp = bufp.Pointer;
resc = bufc.Pointer;
while (resc->Type != ACPI_RESOURCE_TYPE_END_TAG &&
resp->Type != ACPI_RESOURCE_TYPE_END_TAG) {
while (resc->Type != resp->Type && resp->Type != ACPI_RESOURCE_TYPE_END_TAG)
resp = ACPI_NEXT_RESOURCE(resp);
if (resp->Type == ACPI_RESOURCE_TYPE_END_TAG)
break;
/* Found identical Id */
resn->Type = resc->Type;
switch (resc->Type) {
case ACPI_RESOURCE_TYPE_IRQ:
memcpy(&resn->Data, &resp->Data,
sizeof(ACPI_RESOURCE_IRQ));
irq = (ACPI_RESOURCE_IRQ *)&resn->Data;
irq->Interrupts[0] =
((ACPI_RESOURCE_IRQ *)&resp->Data)->
Interrupts[irq->InterruptCount-1];
irq->InterruptCount = 1;
resn->Length = ACPI_RS_SIZE(ACPI_RESOURCE_IRQ);
break;
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
memcpy(&resn->Data, &resp->Data,
sizeof(ACPI_RESOURCE_EXTENDED_IRQ));
xirq = (ACPI_RESOURCE_EXTENDED_IRQ *)&resn->Data;
#if 0
/*
* XXX not duplicating the interrupt logic above
* because its not clear what it accomplishes.
*/
xirq->Interrupts[0] =
((ACPI_RESOURCE_EXT_IRQ *)&resp->Data)->
Interrupts[irq->NumberOfInterrupts-1];
xirq->NumberOfInterrupts = 1;
#endif
resn->Length = ACPI_RS_SIZE(ACPI_RESOURCE_EXTENDED_IRQ);
break;
case ACPI_RESOURCE_TYPE_IO:
memcpy(&resn->Data, &resp->Data,
sizeof(ACPI_RESOURCE_IO));
resn->Length = resp->Length;
break;
default:
printf("acpi_allocate_resources: res=%d\n", resc->Type);
rv = AE_BAD_DATA;
goto out2;
}
resc = ACPI_NEXT_RESOURCE(resc);
resn = ACPI_NEXT_RESOURCE(resn);
resp = ACPI_NEXT_RESOURCE(resp);
delta = (UINT8 *)resn - (UINT8 *)bufn.Pointer;
if (delta >=
bufn.Length-ACPI_RS_SIZE(ACPI_RESOURCE_DATA)) {
bufn.Length *= 2;
bufn.Pointer = realloc(bufn.Pointer, bufn.Length,
M_ACPI, M_WAITOK);
resn = (ACPI_RESOURCE *)((UINT8 *)bufn.Pointer + delta);
}
}
if (resc->Type != ACPI_RESOURCE_TYPE_END_TAG) {
printf("acpi_allocate_resources: resc not exhausted\n");
rv = AE_BAD_DATA;
goto out3;
}
resn->Type = ACPI_RESOURCE_TYPE_END_TAG;
rv = AcpiSetCurrentResources(handle, &bufn);
if (ACPI_FAILURE(rv)) {
printf("acpi_allocate_resources: AcpiSetCurrentResources %s\n",
AcpiFormatException(rv));
}
out3:
free(bufn.Pointer, M_ACPI);
out2:
AcpiOsFree(bufc.Pointer);
out1:
AcpiOsFree(bufp.Pointer);
out:
return rv;
}
#endif /* ACPI_ACTIVATE_DEV */
SYSCTL_SETUP(sysctl_acpi_setup, "sysctl hw.acpi subtree setup")
{
const struct sysctlnode *node;
const struct sysctlnode *ssnode;
if (sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "hw", NULL,
NULL, 0, NULL, 0,
CTL_HW, CTL_EOL) != 0)
return;
if (sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "acpi", NULL,
NULL, 0, NULL, 0,
CTL_HW, CTL_CREATE, CTL_EOL) != 0)
return;
sysctl_createv(NULL, 0, NULL, NULL, CTLFLAG_READONLY,
CTLTYPE_QUAD, "root",
SYSCTL_DESCR("ACPI root pointer"),
NULL, 0, &acpi_root_pointer, sizeof(acpi_root_pointer),
CTL_HW, node->sysctl_num, CTL_CREATE, CTL_EOL);
sysctl_createv(NULL, 0, NULL, NULL, CTLFLAG_READONLY,
CTLTYPE_STRING, "supported_states",
SYSCTL_DESCR("Supported ACPI system states"),
NULL, 0, acpi_supported_states, 0,
CTL_HW, node->sysctl_num, CTL_CREATE, CTL_EOL);
/* ACPI sleepstate sysctl */
if (sysctl_createv(NULL, 0, NULL, &node,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "machdep", NULL,
NULL, 0, NULL, 0, CTL_MACHDEP, CTL_EOL) != 0)
return;
if (sysctl_createv(NULL, 0, &node, &ssnode,
CTLFLAG_READWRITE, CTLTYPE_INT, "sleep_state",
NULL, sysctl_hw_acpi_sleepstate, 0, NULL, 0, CTL_CREATE,
CTL_EOL) != 0)
return;
}
static int
sysctl_hw_acpi_sleepstate(SYSCTLFN_ARGS)
{
int error, t;
struct sysctlnode node;
node = *rnode;
t = acpi_sleepstate;
node.sysctl_data = &t;
error = sysctl_lookup(SYSCTLFN_CALL(&node));
if (error || newp == NULL)
return error;
if (acpi_softc == NULL)
return ENOSYS;
acpi_enter_sleep_state(acpi_softc, t);
return 0;
}
static ACPI_TABLE_HEADER *
acpi_map_rsdt(void)
{
ACPI_PHYSICAL_ADDRESS paddr;
ACPI_TABLE_RSDP *rsdp;
paddr = AcpiOsGetRootPointer();
if (paddr == 0) {
printf("ACPI: couldn't get root pointer\n");
return NULL;
}
rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP));
if (rsdp == NULL) {
printf("ACPI: couldn't map RSDP\n");
return NULL;
}
if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress)
paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
else
paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
return AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER));
}
static void
acpi_unmap_rsdt(ACPI_TABLE_HEADER *rsdt)
{
if (rsdt == NULL)
return;
AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
}
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