d3e1c2411e
is reserved by the loader, and thus any tunable name with that suffix will be silently discarded. Document this in the header and man page so that other developers do not develop so many bumps on the head after banging it against the wall. Detective work by: Mark Santcroos, grehan
96 lines
2.7 KiB
C
96 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_osname[128];
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TUNABLE_STR("hw.acpi.osname", acpi_osname, sizeof(acpi_osname));
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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 && strlen(acpi_osname) > 0) {
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printf("ACPI: Overriding _OS definition with \"%s\"\n", acpi_osname);
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*NewVal = acpi_osname;
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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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