| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: utaddress - OpRegion address range check |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
| 44 | #include "acpi.h" |
| 45 | #include "accommon.h" |
| 46 | #include "acnamesp.h" |
| 47 | |
| 48 | |
| 49 | #define _COMPONENT ACPI_UTILITIES |
| 50 | ACPI_MODULE_NAME ("utaddress" ) |
| 51 | |
| 52 | |
| 53 | /******************************************************************************* |
| 54 | * |
| 55 | * FUNCTION: AcpiUtAddAddressRange |
| 56 | * |
| 57 | * PARAMETERS: SpaceId - Address space ID |
| 58 | * Address - OpRegion start address |
| 59 | * Length - OpRegion length |
| 60 | * RegionNode - OpRegion namespace node |
| 61 | * |
| 62 | * RETURN: Status |
| 63 | * |
| 64 | * DESCRIPTION: Add the Operation Region address range to the global list. |
| 65 | * The only supported Space IDs are Memory and I/O. Called when |
| 66 | * the OpRegion address/length operands are fully evaluated. |
| 67 | * |
| 68 | * MUTEX: Locks the namespace |
| 69 | * |
| 70 | * NOTE: Because this interface is only called when an OpRegion argument |
| 71 | * list is evaluated, there cannot be any duplicate RegionNodes. |
| 72 | * Duplicate Address/Length values are allowed, however, so that multiple |
| 73 | * address conflicts can be detected. |
| 74 | * |
| 75 | ******************************************************************************/ |
| 76 | |
| 77 | ACPI_STATUS |
| 78 | AcpiUtAddAddressRange ( |
| 79 | ACPI_ADR_SPACE_TYPE SpaceId, |
| 80 | ACPI_PHYSICAL_ADDRESS Address, |
| 81 | UINT32 Length, |
| 82 | ACPI_NAMESPACE_NODE *RegionNode) |
| 83 | { |
| 84 | ACPI_ADDRESS_RANGE *RangeInfo; |
| 85 | |
| 86 | |
| 87 | ACPI_FUNCTION_TRACE (UtAddAddressRange); |
| 88 | |
| 89 | |
| 90 | if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) && |
| 91 | (SpaceId != ACPI_ADR_SPACE_SYSTEM_IO)) |
| 92 | { |
| 93 | return_ACPI_STATUS (AE_OK); |
| 94 | } |
| 95 | |
| 96 | /* Allocate/init a new info block, add it to the appropriate list */ |
| 97 | |
| 98 | RangeInfo = ACPI_ALLOCATE (sizeof (ACPI_ADDRESS_RANGE)); |
| 99 | if (!RangeInfo) |
| 100 | { |
| 101 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 102 | } |
| 103 | |
| 104 | RangeInfo->StartAddress = Address; |
| 105 | RangeInfo->EndAddress = (Address + Length - 1); |
| 106 | RangeInfo->RegionNode = RegionNode; |
| 107 | |
| 108 | RangeInfo->Next = AcpiGbl_AddressRangeList[SpaceId]; |
| 109 | AcpiGbl_AddressRangeList[SpaceId] = RangeInfo; |
| 110 | |
| 111 | ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, |
| 112 | "\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n" , |
| 113 | AcpiUtGetNodeName (RangeInfo->RegionNode), |
| 114 | ACPI_FORMAT_UINT64 (Address), |
| 115 | ACPI_FORMAT_UINT64 (RangeInfo->EndAddress))); |
| 116 | |
| 117 | return_ACPI_STATUS (AE_OK); |
| 118 | } |
| 119 | |
| 120 | |
| 121 | /******************************************************************************* |
| 122 | * |
| 123 | * FUNCTION: AcpiUtRemoveAddressRange |
| 124 | * |
| 125 | * PARAMETERS: SpaceId - Address space ID |
| 126 | * RegionNode - OpRegion namespace node |
| 127 | * |
| 128 | * RETURN: None |
| 129 | * |
| 130 | * DESCRIPTION: Remove the Operation Region from the global list. The only |
| 131 | * supported Space IDs are Memory and I/O. Called when an |
| 132 | * OpRegion is deleted. |
| 133 | * |
| 134 | * MUTEX: Assumes the namespace is locked |
| 135 | * |
| 136 | ******************************************************************************/ |
| 137 | |
| 138 | void |
| 139 | AcpiUtRemoveAddressRange ( |
| 140 | ACPI_ADR_SPACE_TYPE SpaceId, |
| 141 | ACPI_NAMESPACE_NODE *RegionNode) |
| 142 | { |
| 143 | ACPI_ADDRESS_RANGE *RangeInfo; |
| 144 | ACPI_ADDRESS_RANGE *Prev; |
| 145 | |
| 146 | |
| 147 | ACPI_FUNCTION_TRACE (UtRemoveAddressRange); |
| 148 | |
| 149 | |
| 150 | if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) && |
| 151 | (SpaceId != ACPI_ADR_SPACE_SYSTEM_IO)) |
| 152 | { |
| 153 | return_VOID; |
| 154 | } |
| 155 | |
| 156 | /* Get the appropriate list head and check the list */ |
| 157 | |
| 158 | RangeInfo = Prev = AcpiGbl_AddressRangeList[SpaceId]; |
| 159 | while (RangeInfo) |
| 160 | { |
| 161 | if (RangeInfo->RegionNode == RegionNode) |
| 162 | { |
| 163 | if (RangeInfo == Prev) /* Found at list head */ |
| 164 | { |
| 165 | AcpiGbl_AddressRangeList[SpaceId] = RangeInfo->Next; |
| 166 | } |
| 167 | else |
| 168 | { |
| 169 | Prev->Next = RangeInfo->Next; |
| 170 | } |
| 171 | |
| 172 | ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, |
| 173 | "\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n" , |
| 174 | AcpiUtGetNodeName (RangeInfo->RegionNode), |
| 175 | ACPI_FORMAT_UINT64 (RangeInfo->StartAddress), |
| 176 | ACPI_FORMAT_UINT64 (RangeInfo->EndAddress))); |
| 177 | |
| 178 | ACPI_FREE (RangeInfo); |
| 179 | return_VOID; |
| 180 | } |
| 181 | |
| 182 | Prev = RangeInfo; |
| 183 | RangeInfo = RangeInfo->Next; |
| 184 | } |
| 185 | |
| 186 | return_VOID; |
| 187 | } |
| 188 | |
| 189 | |
| 190 | /******************************************************************************* |
| 191 | * |
| 192 | * FUNCTION: AcpiUtCheckAddressRange |
| 193 | * |
| 194 | * PARAMETERS: SpaceId - Address space ID |
| 195 | * Address - Start address |
| 196 | * Length - Length of address range |
| 197 | * Warn - TRUE if warning on overlap desired |
| 198 | * |
| 199 | * RETURN: Count of the number of conflicts detected. Zero is always |
| 200 | * returned for Space IDs other than Memory or I/O. |
| 201 | * |
| 202 | * DESCRIPTION: Check if the input address range overlaps any of the |
| 203 | * ASL operation region address ranges. The only supported |
| 204 | * Space IDs are Memory and I/O. |
| 205 | * |
| 206 | * MUTEX: Assumes the namespace is locked. |
| 207 | * |
| 208 | ******************************************************************************/ |
| 209 | |
| 210 | UINT32 |
| 211 | AcpiUtCheckAddressRange ( |
| 212 | ACPI_ADR_SPACE_TYPE SpaceId, |
| 213 | ACPI_PHYSICAL_ADDRESS Address, |
| 214 | UINT32 Length, |
| 215 | BOOLEAN Warn) |
| 216 | { |
| 217 | ACPI_ADDRESS_RANGE *RangeInfo; |
| 218 | ACPI_PHYSICAL_ADDRESS EndAddress; |
| 219 | char *Pathname; |
| 220 | UINT32 OverlapCount = 0; |
| 221 | |
| 222 | |
| 223 | ACPI_FUNCTION_TRACE (UtCheckAddressRange); |
| 224 | |
| 225 | |
| 226 | if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) && |
| 227 | (SpaceId != ACPI_ADR_SPACE_SYSTEM_IO)) |
| 228 | { |
| 229 | return_UINT32 (0); |
| 230 | } |
| 231 | |
| 232 | RangeInfo = AcpiGbl_AddressRangeList[SpaceId]; |
| 233 | EndAddress = Address + Length - 1; |
| 234 | |
| 235 | /* Check entire list for all possible conflicts */ |
| 236 | |
| 237 | while (RangeInfo) |
| 238 | { |
| 239 | /* |
| 240 | * Check if the requested address/length overlaps this |
| 241 | * address range. There are four cases to consider: |
| 242 | * |
| 243 | * 1) Input address/length is contained completely in the |
| 244 | * address range |
| 245 | * 2) Input address/length overlaps range at the range start |
| 246 | * 3) Input address/length overlaps range at the range end |
| 247 | * 4) Input address/length completely encompasses the range |
| 248 | */ |
| 249 | if ((Address <= RangeInfo->EndAddress) && |
| 250 | (EndAddress >= RangeInfo->StartAddress)) |
| 251 | { |
| 252 | /* Found an address range overlap */ |
| 253 | |
| 254 | OverlapCount++; |
| 255 | if (Warn) /* Optional warning message */ |
| 256 | { |
| 257 | Pathname = AcpiNsGetNormalizedPathname (RangeInfo->RegionNode, TRUE); |
| 258 | |
| 259 | ACPI_WARNING ((AE_INFO, |
| 260 | "%s range 0x%8.8X%8.8X-0x%8.8X%8.8X conflicts with OpRegion 0x%8.8X%8.8X-0x%8.8X%8.8X (%s)" , |
| 261 | AcpiUtGetRegionName (SpaceId), |
| 262 | ACPI_FORMAT_UINT64 (Address), |
| 263 | ACPI_FORMAT_UINT64 (EndAddress), |
| 264 | ACPI_FORMAT_UINT64 (RangeInfo->StartAddress), |
| 265 | ACPI_FORMAT_UINT64 (RangeInfo->EndAddress), |
| 266 | Pathname)); |
| 267 | ACPI_FREE (Pathname); |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | RangeInfo = RangeInfo->Next; |
| 272 | } |
| 273 | |
| 274 | return_UINT32 (OverlapCount); |
| 275 | } |
| 276 | |
| 277 | |
| 278 | /******************************************************************************* |
| 279 | * |
| 280 | * FUNCTION: AcpiUtDeleteAddressLists |
| 281 | * |
| 282 | * PARAMETERS: None |
| 283 | * |
| 284 | * RETURN: None |
| 285 | * |
| 286 | * DESCRIPTION: Delete all global address range lists (called during |
| 287 | * subsystem shutdown). |
| 288 | * |
| 289 | ******************************************************************************/ |
| 290 | |
| 291 | void |
| 292 | AcpiUtDeleteAddressLists ( |
| 293 | void) |
| 294 | { |
| 295 | ACPI_ADDRESS_RANGE *Next; |
| 296 | ACPI_ADDRESS_RANGE *RangeInfo; |
| 297 | int i; |
| 298 | |
| 299 | |
| 300 | /* Delete all elements in all address range lists */ |
| 301 | |
| 302 | for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) |
| 303 | { |
| 304 | Next = AcpiGbl_AddressRangeList[i]; |
| 305 | |
| 306 | while (Next) |
| 307 | { |
| 308 | RangeInfo = Next; |
| 309 | Next = RangeInfo->Next; |
| 310 | ACPI_FREE (RangeInfo); |
| 311 | } |
| 312 | |
| 313 | AcpiGbl_AddressRangeList[i] = NULL; |
| 314 | } |
| 315 | } |
| 316 | |