1 /*- 2 * Copyright (c) 2002 Mitsaru Iwasaki 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 /* 30 * ACPI Table interfaces 31 */ 32 33 #include "acpi.h" 34 35 #include <sys/kernel.h> 36 #include <sys/linker.h> 37 38 #undef _COMPONENT 39 #define _COMPONENT ACPI_TABLES 40 41 ACPI_STATUS 42 AcpiOsTableOverride ( 43 ACPI_TABLE_HEADER *ExistingTable, 44 ACPI_TABLE_HEADER **NewTable) 45 { 46 caddr_t acpi_dsdt, p; 47 48 if (NewTable == NULL) 49 { 50 return(AE_BAD_PARAMETER); 51 } 52 53 (*NewTable) = NULL; 54 55 if ((acpi_dsdt = preload_search_by_type("acpi_dsdt")) == NULL) 56 { 57 return(AE_OK); 58 } 59 60 if ((p = preload_search_info(acpi_dsdt, MODINFO_ADDR)) == NULL) 61 { 62 return(AE_OK); 63 } 64 65 (*NewTable) = *(void **)p; 66 67 printf("ACPI: DSDT was overridden.\n"); 68 69 return(AE_OK); 70 } 71 72