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: src/sys/dev/acpica/Osd/OsdTable.c,v 1.3.4.1 2003/08/22 20:49:21 jhb Exp $ 27 * $DragonFly: src/sys/dev/acpica/Osd/Attic/OsdTable.c,v 1.1 2003/09/24 03:32:16 drhodus Exp $ 28 */ 29 30 /* 31 * ACPI Table interfaces 32 */ 33 34 #include "acpi.h" 35 36 #include <sys/kernel.h> 37 #include <sys/linker.h> 38 39 #undef _COMPONENT 40 #define _COMPONENT ACPI_TABLES 41 42 static char acpi_os_name[128]; 43 44 ACPI_STATUS 45 AcpiOsPredefinedOverride ( 46 const ACPI_PREDEFINED_NAMES *InitVal, 47 ACPI_STRING *NewVal) 48 { 49 if (InitVal == NULL || NewVal == NULL) 50 return(AE_BAD_PARAMETER); 51 52 *NewVal = NULL; 53 if (strncmp(InitVal->Name, "_OS_", 4) == 0 && 54 getenv_string("hw.acpi.os_name", acpi_os_name, sizeof(acpi_os_name))) { 55 printf("ACPI: Overriding _OS definition with \"%s\"\n", acpi_os_name); 56 *NewVal = acpi_os_name; 57 } 58 59 return(AE_OK); 60 } 61 62 ACPI_STATUS 63 AcpiOsTableOverride ( 64 ACPI_TABLE_HEADER *ExistingTable, 65 ACPI_TABLE_HEADER **NewTable) 66 { 67 caddr_t acpi_dsdt, p; 68 69 if (ExistingTable == NULL || NewTable == NULL) 70 { 71 return(AE_BAD_PARAMETER); 72 } 73 74 (*NewTable) = NULL; 75 76 if (strncmp(ExistingTable->Signature, "DSDT", 4) != 0) 77 { 78 return(AE_OK); 79 } 80 81 if ((acpi_dsdt = preload_search_by_type("acpi_dsdt")) == NULL) 82 { 83 return(AE_OK); 84 } 85 86 if ((p = preload_search_info(acpi_dsdt, MODINFO_ADDR)) == NULL) 87 { 88 return(AE_OK); 89 } 90 91 (*NewTable) = *(void **)p; 92 93 printf("ACPI: DSDT was overridden.\n"); 94 95 return(AE_OK); 96 } 97 98