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