79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
/*-
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* Copyright (c) 2000,2001 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* 6.1 : Environmental support
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*/
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#include <sys/types.h>
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#include <sys/linker_set.h>
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#include <sys/sysctl.h>
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#include <contrib/dev/acpica/acpi.h>
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static u_long amd64_acpi_root;
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SYSCTL_ULONG(_machdep, OID_AUTO, acpi_root, CTLFLAG_RD, &amd64_acpi_root, 0,
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"The physical address of the RSDP");
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ACPI_STATUS
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AcpiOsInitialize(void)
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{
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return(0);
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}
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ACPI_STATUS
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AcpiOsTerminate(void)
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{
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return(0);
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}
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ACPI_STATUS
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AcpiOsGetRootPointer(UINT32 Flags, ACPI_POINTER *RsdpPhysicalAddress)
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{
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ACPI_POINTER ptr;
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ACPI_STATUS status;
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if (amd64_acpi_root == 0) {
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/*
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* The loader passes the physical address at which it found the
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* RSDP in a hint. We could recover this rather than searching
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* manually here.
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*/
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status = AcpiFindRootPointer(Flags, &ptr);
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if (status == AE_OK)
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amd64_acpi_root = ptr.Pointer.Physical;
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} else
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status = AE_OK;
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RsdpPhysicalAddress->PointerType = ACPI_PHYSICAL_POINTER;
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RsdpPhysicalAddress->Pointer.Physical = amd64_acpi_root;
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return (status);
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}
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