1 /****************************************************************************** 2 * 3 * Module Name: hwvalid - I/O request validation 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2017, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "acpi.h" 153 #include "accommon.h" 154 155 #define _COMPONENT ACPI_HARDWARE 156 ACPI_MODULE_NAME ("hwvalid") 157 158 /* Local prototypes */ 159 160 static ACPI_STATUS 161 AcpiHwValidateIoRequest ( 162 ACPI_IO_ADDRESS Address, 163 UINT32 BitWidth); 164 165 166 /* 167 * Protected I/O ports. Some ports are always illegal, and some are 168 * conditionally illegal. This table must remain ordered by port address. 169 * 170 * The table is used to implement the Microsoft port access rules that 171 * first appeared in Windows XP. Some ports are always illegal, and some 172 * ports are only illegal if the BIOS calls _OSI with a WinXP string or 173 * later (meaning that the BIOS itelf is post-XP.) 174 * 175 * This provides ACPICA with the desired port protections and 176 * Microsoft compatibility. 177 * 178 * Description of port entries: 179 * DMA: DMA controller 180 * PIC0: Programmable Interrupt Controller (8259A) 181 * PIT1: System Timer 1 182 * PIT2: System Timer 2 failsafe 183 * RTC: Real-time clock 184 * CMOS: Extended CMOS 185 * DMA1: DMA 1 page registers 186 * DMA1L: DMA 1 Ch 0 low page 187 * DMA2: DMA 2 page registers 188 * DMA2L: DMA 2 low page refresh 189 * ARBC: Arbitration control 190 * SETUP: Reserved system board setup 191 * POS: POS channel select 192 * PIC1: Cascaded PIC 193 * IDMA: ISA DMA 194 * ELCR: PIC edge/level registers 195 * PCI: PCI configuration space 196 */ 197 static const ACPI_PORT_INFO AcpiProtectedPorts[] = 198 { 199 {"DMA", 0x0000, 0x000F, ACPI_OSI_WIN_XP}, 200 {"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL}, 201 {"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP}, 202 {"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP}, 203 {"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP}, 204 {"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP}, 205 {"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP}, 206 {"DMA1L", 0x0087, 0x0087, ACPI_OSI_WIN_XP}, 207 {"DMA2", 0x0089, 0x008B, ACPI_OSI_WIN_XP}, 208 {"DMA2L", 0x008F, 0x008F, ACPI_OSI_WIN_XP}, 209 {"ARBC", 0x0090, 0x0091, ACPI_OSI_WIN_XP}, 210 {"SETUP", 0x0093, 0x0094, ACPI_OSI_WIN_XP}, 211 {"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP}, 212 {"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL}, 213 {"IDMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP}, 214 {"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL}, 215 {"PCI", 0x0CF8, 0x0CFF, ACPI_OSI_WIN_XP} 216 }; 217 218 #define ACPI_PORT_INFO_ENTRIES ACPI_ARRAY_LENGTH (AcpiProtectedPorts) 219 220 221 /****************************************************************************** 222 * 223 * FUNCTION: AcpiHwValidateIoRequest 224 * 225 * PARAMETERS: Address Address of I/O port/register 226 * BitWidth Number of bits (8,16,32) 227 * 228 * RETURN: Status 229 * 230 * DESCRIPTION: Validates an I/O request (address/length). Certain ports are 231 * always illegal and some ports are only illegal depending on 232 * the requests the BIOS AML code makes to the predefined 233 * _OSI method. 234 * 235 ******************************************************************************/ 236 237 static ACPI_STATUS 238 AcpiHwValidateIoRequest ( 239 ACPI_IO_ADDRESS Address, 240 UINT32 BitWidth) 241 { 242 UINT32 i; 243 UINT32 ByteWidth; 244 ACPI_IO_ADDRESS LastAddress; 245 const ACPI_PORT_INFO *PortInfo; 246 247 248 ACPI_FUNCTION_NAME (HwValidateIoRequest); 249 250 251 /* Supported widths are 8/16/32 */ 252 253 if ((BitWidth != 8) && 254 (BitWidth != 16) && 255 (BitWidth != 32)) 256 { 257 ACPI_ERROR ((AE_INFO, 258 "Bad BitWidth parameter: %8.8X", BitWidth)); 259 return (AE_BAD_PARAMETER); 260 } 261 262 PortInfo = AcpiProtectedPorts; 263 ByteWidth = ACPI_DIV_8 (BitWidth); 264 LastAddress = Address + ByteWidth - 1; 265 266 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Address %8.8X%8.8X LastAddress %8.8X%8.8X Length %X", 267 ACPI_FORMAT_UINT64 (Address), ACPI_FORMAT_UINT64 (LastAddress), 268 ByteWidth)); 269 270 /* Maximum 16-bit address in I/O space */ 271 272 if (LastAddress > ACPI_UINT16_MAX) 273 { 274 ACPI_ERROR ((AE_INFO, 275 "Illegal I/O port address/length above 64K: %8.8X%8.8X/0x%X", 276 ACPI_FORMAT_UINT64 (Address), ByteWidth)); 277 return (AE_LIMIT); 278 } 279 280 /* Exit if requested address is not within the protected port table */ 281 282 if (Address > AcpiProtectedPorts[ACPI_PORT_INFO_ENTRIES - 1].End) 283 { 284 return (AE_OK); 285 } 286 287 /* Check request against the list of protected I/O ports */ 288 289 for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, PortInfo++) 290 { 291 /* 292 * Check if the requested address range will write to a reserved 293 * port. There are four cases to consider: 294 * 295 * 1) Address range is contained completely in the port address range 296 * 2) Address range overlaps port range at the port range start 297 * 3) Address range overlaps port range at the port range end 298 * 4) Address range completely encompasses the port range 299 */ 300 if ((Address <= PortInfo->End) && (LastAddress >= PortInfo->Start)) 301 { 302 /* Port illegality may depend on the _OSI calls made by the BIOS */ 303 304 if (AcpiGbl_OsiData >= PortInfo->OsiDependency) 305 { 306 ACPI_DEBUG_PRINT ((ACPI_DB_IO, 307 "Denied AML access to port 0x%8.8X%8.8X/%X (%s 0x%.4X-0x%.4X)", 308 ACPI_FORMAT_UINT64 (Address), ByteWidth, PortInfo->Name, 309 PortInfo->Start, PortInfo->End)); 310 311 return_ACPI_STATUS (AE_AML_ILLEGAL_ADDRESS); 312 } 313 } 314 315 /* Finished if address range ends before the end of this port */ 316 317 if (LastAddress <= PortInfo->End) 318 { 319 break; 320 } 321 } 322 323 return (AE_OK); 324 } 325 326 327 /****************************************************************************** 328 * 329 * FUNCTION: AcpiHwReadPort 330 * 331 * PARAMETERS: Address Address of I/O port/register to read 332 * Value Where value (data) is returned 333 * Width Number of bits 334 * 335 * RETURN: Status and value read from port 336 * 337 * DESCRIPTION: Read data from an I/O port or register. This is a front-end 338 * to AcpiOsReadPort that performs validation on both the port 339 * address and the length. 340 * 341 *****************************************************************************/ 342 343 ACPI_STATUS 344 AcpiHwReadPort ( 345 ACPI_IO_ADDRESS Address, 346 UINT32 *Value, 347 UINT32 Width) 348 { 349 ACPI_STATUS Status; 350 UINT32 OneByte; 351 UINT32 i; 352 353 354 /* Truncate address to 16 bits if requested */ 355 356 if (AcpiGbl_TruncateIoAddresses) 357 { 358 Address &= ACPI_UINT16_MAX; 359 } 360 361 /* Validate the entire request and perform the I/O */ 362 363 Status = AcpiHwValidateIoRequest (Address, Width); 364 if (ACPI_SUCCESS (Status)) 365 { 366 Status = AcpiOsReadPort (Address, Value, Width); 367 return (Status); 368 } 369 370 if (Status != AE_AML_ILLEGAL_ADDRESS) 371 { 372 return (Status); 373 } 374 375 /* 376 * There has been a protection violation within the request. Fall 377 * back to byte granularity port I/O and ignore the failing bytes. 378 * This provides compatibility with other ACPI implementations. 379 */ 380 for (i = 0, *Value = 0; i < Width; i += 8) 381 { 382 /* Validate and read one byte */ 383 384 if (AcpiHwValidateIoRequest (Address, 8) == AE_OK) 385 { 386 Status = AcpiOsReadPort (Address, &OneByte, 8); 387 if (ACPI_FAILURE (Status)) 388 { 389 return (Status); 390 } 391 392 *Value |= (OneByte << i); 393 } 394 395 Address++; 396 } 397 398 return (AE_OK); 399 } 400 401 402 /****************************************************************************** 403 * 404 * FUNCTION: AcpiHwWritePort 405 * 406 * PARAMETERS: Address Address of I/O port/register to write 407 * Value Value to write 408 * Width Number of bits 409 * 410 * RETURN: Status 411 * 412 * DESCRIPTION: Write data to an I/O port or register. This is a front-end 413 * to AcpiOsWritePort that performs validation on both the port 414 * address and the length. 415 * 416 *****************************************************************************/ 417 418 ACPI_STATUS 419 AcpiHwWritePort ( 420 ACPI_IO_ADDRESS Address, 421 UINT32 Value, 422 UINT32 Width) 423 { 424 ACPI_STATUS Status; 425 UINT32 i; 426 427 428 /* Truncate address to 16 bits if requested */ 429 430 if (AcpiGbl_TruncateIoAddresses) 431 { 432 Address &= ACPI_UINT16_MAX; 433 } 434 435 /* Validate the entire request and perform the I/O */ 436 437 Status = AcpiHwValidateIoRequest (Address, Width); 438 if (ACPI_SUCCESS (Status)) 439 { 440 Status = AcpiOsWritePort (Address, Value, Width); 441 return (Status); 442 } 443 444 if (Status != AE_AML_ILLEGAL_ADDRESS) 445 { 446 return (Status); 447 } 448 449 /* 450 * There has been a protection violation within the request. Fall 451 * back to byte granularity port I/O and ignore the failing bytes. 452 * This provides compatibility with other ACPI implementations. 453 */ 454 for (i = 0; i < Width; i += 8) 455 { 456 /* Validate and write one byte */ 457 458 if (AcpiHwValidateIoRequest (Address, 8) == AE_OK) 459 { 460 Status = AcpiOsWritePort (Address, (Value >> i) & 0xFF, 8); 461 if (ACPI_FAILURE (Status)) 462 { 463 return (Status); 464 } 465 } 466 467 Address++; 468 } 469 470 return (AE_OK); 471 } 472