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 27 /* 28 * ACPI Table interfaces 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/endian.h> 36 #include <sys/kernel.h> 37 #include <sys/linker.h> 38 39 #include <contrib/dev/acpica/include/acpi.h> 40 #include <contrib/dev/acpica/include/actables.h> 41 42 #undef _COMPONENT 43 #define _COMPONENT ACPI_TABLES 44 45 static char acpi_osname[128]; 46 TUNABLE_STR("hw.acpi.osname", acpi_osname, sizeof(acpi_osname)); 47 48 ACPI_STATUS 49 AcpiOsPredefinedOverride(const ACPI_PREDEFINED_NAMES *InitVal, 50 ACPI_STRING *NewVal) 51 { 52 53 if (InitVal == NULL || NewVal == NULL) 54 return (AE_BAD_PARAMETER); 55 56 *NewVal = NULL; 57 if (strncmp(InitVal->Name, "_OS_", ACPI_NAME_SIZE) == 0 && 58 strlen(acpi_osname) > 0) { 59 printf("ACPI: Overriding _OS definition with \"%s\"\n", acpi_osname); 60 *NewVal = acpi_osname; 61 } 62 63 return (AE_OK); 64 } 65 66 ACPI_STATUS 67 AcpiOsTableOverride(ACPI_TABLE_HEADER *ExistingTable, 68 ACPI_TABLE_HEADER **NewTable) 69 { 70 char modname[] = "acpi_dsdt"; 71 caddr_t acpi_table; 72 ACPI_TABLE_HEADER *hdr; 73 size_t sz; 74 75 if (ExistingTable == NULL || NewTable == NULL) 76 return (AE_BAD_PARAMETER); 77 78 *NewTable = NULL; 79 #ifdef notyet 80 for (int i = 0; i < ACPI_NAME_SIZE; i++) 81 modname[i + 5] = tolower(ExistingTable->Signature[i]); 82 #else 83 /* If we're not overriding the DSDT, just return. */ 84 if (strncmp(ExistingTable->Signature, ACPI_SIG_DSDT, ACPI_NAME_SIZE) != 0) 85 return (AE_OK); 86 #endif 87 88 acpi_table = preload_search_by_type(modname); 89 if (acpi_table == NULL) 90 return (AE_OK); 91 92 hdr = preload_fetch_addr(acpi_table); 93 sz = preload_fetch_size(acpi_table); 94 if (hdr != NULL && sz != 0) 95 *NewTable = hdr; 96 97 return (AE_OK); 98 } 99 100 ACPI_STATUS 101 AcpiOsPhysicalTableOverride(ACPI_TABLE_HEADER *ExistingTable, 102 ACPI_PHYSICAL_ADDRESS *NewAddress, UINT32 *NewTableLength) 103 { 104 105 return (AE_SUPPORT); 106 } 107