freebsd-dev/sys/dev/acpica/Osd/OsdTable.c

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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.
*/
/*
* ACPI Table interfaces
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/linker.h>
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#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/actables.h>
#undef _COMPONENT
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#define _COMPONENT ACPI_TABLES
static char acpi_osname[128];
TUNABLE_STR("hw.acpi.osname", acpi_osname, sizeof(acpi_osname));
ACPI_STATUS
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AcpiOsPredefinedOverride(const ACPI_PREDEFINED_NAMES *InitVal,
ACPI_STRING *NewVal)
{
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if (InitVal == NULL || NewVal == NULL)
return (AE_BAD_PARAMETER);
*NewVal = NULL;
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if (strncmp(InitVal->Name, "_OS_", ACPI_NAME_SIZE) == 0 &&
strlen(acpi_osname) > 0) {
printf("ACPI: Overriding _OS definition with \"%s\"\n", acpi_osname);
*NewVal = acpi_osname;
}
return (AE_OK);
}
ACPI_STATUS
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AcpiOsTableOverride(ACPI_TABLE_HEADER *ExistingTable,
ACPI_TABLE_HEADER **NewTable)
{
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char modname[] = "acpi_dsdt";
caddr_t acpi_table, p, s;
if (ExistingTable == NULL || NewTable == NULL)
return (AE_BAD_PARAMETER);
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#ifdef notyet
for (int i = 0; i < ACPI_NAME_SIZE; i++)
modname[i + 5] = tolower(ExistingTable->Signature[i]);
#else
/* If we're not overriding the DSDT, just return. */
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if (strncmp(ExistingTable->Signature, ACPI_SIG_DSDT, ACPI_NAME_SIZE) != 0) {
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*NewTable = NULL;
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return (AE_OK);
}
#endif
if ((acpi_table = preload_search_by_type(modname)) != NULL &&
(p = preload_search_info(acpi_table, MODINFO_ADDR)) != NULL &&
(s = preload_search_info(acpi_table, MODINFO_SIZE)) != NULL &&
*(size_t *)s != 0)
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*NewTable = *(ACPI_TABLE_HEADER **)p;
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else
*NewTable = NULL;
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return (AE_OK);
}