1 /*- 2 * Copyright (c) 2003 Nate Lawson 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 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/kernel.h> 32 #include <sys/bus.h> 33 #include <sys/sbuf.h> 34 35 #include <machine/bus.h> 36 #include <machine/resource.h> 37 #include <sys/rman.h> 38 39 #include <contrib/dev/acpica/include/acpi.h> 40 41 #include <dev/acpica/acpivar.h> 42 43 /* 44 * Package manipulation convenience functions 45 */ 46 47 int 48 acpi_PkgInt(ACPI_OBJECT *res, int idx, UINT64 *dst) 49 { 50 ACPI_OBJECT *obj; 51 52 obj = &res->Package.Elements[idx]; 53 if (obj->Type != ACPI_TYPE_INTEGER) 54 return (EINVAL); 55 *dst = obj->Integer.Value; 56 57 return (0); 58 } 59 60 int 61 acpi_PkgInt32(ACPI_OBJECT *res, int idx, uint32_t *dst) 62 { 63 UINT64 tmp; 64 int error; 65 66 error = acpi_PkgInt(res, idx, &tmp); 67 if (error == 0) 68 *dst = (uint32_t)tmp; 69 70 return (error); 71 } 72 73 int 74 acpi_PkgInt16(ACPI_OBJECT *res, int idx, uint16_t *dst) 75 { 76 UINT64 tmp; 77 int error; 78 79 error = acpi_PkgInt(res, idx, &tmp); 80 if (error == 0) 81 *dst = (uint16_t)tmp; 82 83 return (error); 84 } 85 86 int 87 acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size) 88 { 89 ACPI_OBJECT *obj; 90 void *ptr; 91 size_t length; 92 93 obj = &res->Package.Elements[idx]; 94 if (obj == NULL) 95 return (EINVAL); 96 97 switch (obj->Type) { 98 case ACPI_TYPE_STRING: 99 ptr = obj->String.Pointer; 100 length = obj->String.Length; 101 break; 102 case ACPI_TYPE_BUFFER: 103 ptr = obj->Buffer.Pointer; 104 length = obj->Buffer.Length; 105 break; 106 default: 107 return (EINVAL); 108 } 109 110 /* Make sure string will fit, including terminating NUL */ 111 if (++length > size) 112 return (E2BIG); 113 114 strlcpy(dst, ptr, length); 115 return (0); 116 } 117 118 int 119 acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *type, int *rid, 120 struct resource **dst, u_int flags) 121 { 122 ACPI_GENERIC_ADDRESS gas; 123 ACPI_OBJECT *obj; 124 125 obj = &res->Package.Elements[idx]; 126 if (obj == NULL || obj->Type != ACPI_TYPE_BUFFER || 127 obj->Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3) 128 return (EINVAL); 129 130 memcpy(&gas, obj->Buffer.Pointer + 3, sizeof(gas)); 131 132 return (acpi_bus_alloc_gas(dev, type, rid, &gas, dst, flags)); 133 } 134 135 int 136 acpi_PkgFFH_IntelCpu(ACPI_OBJECT *res, int idx, int *vendor, int *class, 137 uint64_t *address, int *accsize) 138 { 139 ACPI_GENERIC_ADDRESS gas; 140 ACPI_OBJECT *obj; 141 142 obj = &res->Package.Elements[idx]; 143 if (obj == NULL || obj->Type != ACPI_TYPE_BUFFER || 144 obj->Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3) 145 return (EINVAL); 146 147 memcpy(&gas, obj->Buffer.Pointer + 3, sizeof(gas)); 148 if (gas.SpaceId != ACPI_ADR_SPACE_FIXED_HARDWARE) 149 return (ERESTART); 150 *vendor = gas.BitWidth; 151 *class = gas.BitOffset; 152 *address = gas.Address; 153 *accsize = gas.AccessWidth; 154 return (0); 155 } 156 157 ACPI_HANDLE 158 acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj) 159 { 160 ACPI_HANDLE h; 161 162 if (obj == NULL) 163 return (NULL); 164 165 switch (obj->Type) { 166 case ACPI_TYPE_LOCAL_REFERENCE: 167 case ACPI_TYPE_ANY: 168 h = obj->Reference.Handle; 169 break; 170 case ACPI_TYPE_STRING: 171 /* 172 * The String object usually contains a fully-qualified path, so 173 * scope can be NULL. 174 * 175 * XXX This may not always be the case. 176 */ 177 if (ACPI_FAILURE(AcpiGetHandle(scope, obj->String.Pointer, &h))) 178 h = NULL; 179 break; 180 default: 181 h = NULL; 182 break; 183 } 184 185 return (h); 186 } 187