61fd6a1ea2
This commentary was carried over from the x86 version of the same code,
but has actually been inaccurate for a while now. As of FreeBSD 12.x,
all environments are used unless they disable each other. See
39d44f7f15 ("kern_environment: use any provided environments [...]")
for details.
Reviewed by: imp
Differentiala Revision: https://reviews.freebsd.org/D35695
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/*-
|
|
* 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/kernel.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <contrib/dev/acpica/include/acpi.h>
|
|
#include <contrib/dev/acpica/include/aclocal.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 (TUNABLE_ULONG_FETCH("acpi.rsdp", &acpi_root))
|
|
return (acpi_root);
|
|
|
|
/*
|
|
* The hints mechanism is considered legacy and has been replaced
|
|
* by the tunable method, but is used here as a fallback to
|
|
* retain maximum compatibility between old loaders and new
|
|
* kernels. It can be removed after 14.0R.
|
|
*/
|
|
if (resource_long_value("acpi", 0, "rsdp", &acpi_root) == 0)
|
|
return (acpi_root);
|
|
|
|
return (0);
|
|
}
|
|
|
|
ACPI_PHYSICAL_ADDRESS
|
|
AcpiOsGetRootPointer(void)
|
|
{
|
|
|
|
if (acpi_root_phys == 0)
|
|
acpi_root_phys = acpi_get_root_from_loader();
|
|
|
|
return (acpi_root_phys);
|
|
}
|