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/*-
* Copyright (c) 2002 Mitsaru Iwasaki
* 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.
*
* $FreeBSD$
*/
/*
* ACPI Table interfaces
*/
#include "acpi.h"
#include <sys/kernel.h>
#include <sys/linker.h>
#undef _COMPONENT
#define _COMPONENT ACPI_TABLES
static char acpi_osname[128];
TUNABLE_STR("hw.acpi.osname", acpi_osname, sizeof(acpi_osname));
ACPI_STATUS
AcpiOsPredefinedOverride (
const ACPI_PREDEFINED_NAMES *InitVal,
ACPI_STRING *NewVal)
{
if (InitVal == NULL || NewVal == NULL)
return (AE_BAD_PARAMETER);
*NewVal = NULL;
if (strncmp(InitVal->Name, "_OS_", 4) == 0 && strlen(acpi_osname) > 0) {
printf("ACPI: Overriding _OS definition with \"%s\"\n", acpi_osname);
*NewVal = acpi_osname;
}
return (AE_OK);
}
ACPI_STATUS
AcpiOsTableOverride (
ACPI_TABLE_HEADER *ExistingTable,
ACPI_TABLE_HEADER **NewTable)
{
caddr_t acpi_dsdt, p;
if (ExistingTable == NULL || NewTable == NULL)
{
return(AE_BAD_PARAMETER);
}
(*NewTable) = NULL;
if (strncmp(ExistingTable->Signature, "DSDT", 4) != 0)
{
return(AE_OK);
}
if ((acpi_dsdt = preload_search_by_type("acpi_dsdt")) == NULL)
{
return(AE_OK);
}
if ((p = preload_search_info(acpi_dsdt, MODINFO_ADDR)) == NULL)
{
return(AE_OK);
}
(*NewTable) = *(void **)p;
printf("ACPI: DSDT was overridden.\n");
return(AE_OK);
}
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