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51773ddf47
* AcpiOsDerivePciId(): finds a bus number, given the slot/func and the
acpi parse tree.
* AcpiOsPredefinedOverride(): use the sysctl hw.acpi.os_name to
override the value for _OS.
Ideas from: takawata, jhb
Reviewed by: takawata, marcel
Tested on: i386, ia64
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/*-
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* Copyright (c) 2002 Mitsaru Iwasaki
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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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* $FreeBSD$
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*/
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/*
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* ACPI Table interfaces
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*/
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#include "acpi.h"
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#include <sys/kernel.h>
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#include <sys/linker.h>
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#undef _COMPONENT
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#define _COMPONENT ACPI_TABLES
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static char acpi_os_name[128];
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ACPI_STATUS
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AcpiOsPredefinedOverride (
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const ACPI_PREDEFINED_NAMES *InitVal,
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ACPI_STRING *NewVal)
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{
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if (InitVal == NULL || NewVal == NULL)
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return(AE_BAD_PARAMETER);
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*NewVal = NULL;
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if (strncmp(InitVal->Name, "_OS_", 4) == 0 &&
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getenv_string("hw.acpi.os_name", acpi_os_name, sizeof(acpi_os_name))) {
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printf("ACPI: Overriding _OS definition with \"%s\"\n", acpi_os_name);
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*NewVal = acpi_os_name;
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}
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return(AE_OK);
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}
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ACPI_STATUS
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AcpiOsTableOverride (
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ACPI_TABLE_HEADER *ExistingTable,
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ACPI_TABLE_HEADER **NewTable)
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{
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caddr_t acpi_dsdt, p;
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if (ExistingTable == NULL || NewTable == NULL)
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{
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return(AE_BAD_PARAMETER);
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}
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(*NewTable) = NULL;
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if (strncmp(ExistingTable->Signature, "DSDT", 4) != 0)
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{
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return(AE_OK);
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}
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if ((acpi_dsdt = preload_search_by_type("acpi_dsdt")) == NULL)
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{
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return(AE_OK);
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}
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if ((p = preload_search_info(acpi_dsdt, MODINFO_ADDR)) == NULL)
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{
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return(AE_OK);
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}
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(*NewTable) = *(void **)p;
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printf("ACPI: DSDT was overridden.\n");
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return(AE_OK);
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}
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