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/*-
* Copyright (c) 2000,2001 Michael Smith
* Copyright (c) 2000 BSDi
* 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/types.h>
#include <sys/bus.h>
#include <sys/sysctl.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/actables.h>
static u_long acpi_root_phys;
SYSCTL_ULONG(_machdep, OID_AUTO, acpi_root, CTLFLAG_RD, &acpi_root_phys, 0,
"The physical address of the RSDP");
ACPI_STATUS
AcpiOsInitialize(void)
{
return (AE_OK);
}
ACPI_STATUS
AcpiOsTerminate(void)
{
return (AE_OK);
}
static u_long
acpi_get_root_from_loader(void)
{
long acpi_root;
if (resource_long_value("acpi", 0, "rsdp", &acpi_root) == 0)
return (acpi_root);
return (0);
}
static u_long
acpi_get_root_from_memory(void)
{
ACPI_SIZE acpi_root;
if (ACPI_SUCCESS(AcpiFindRootPointer(&acpi_root)))
return (acpi_root);
return (0);
}
ACPI_PHYSICAL_ADDRESS
AcpiOsGetRootPointer(void)
{
if (acpi_root_phys == 0) {
acpi_root_phys = acpi_get_root_from_loader();
if (acpi_root_phys == 0)
acpi_root_phys = acpi_get_root_from_memory();
}
return (acpi_root_phys);
}
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