1193267Sjkim/****************************************************************************** 2193267Sjkim * 3193267Sjkim * Module Name: hwvalid - I/O request validation 4193267Sjkim * 5193267Sjkim *****************************************************************************/ 6193267Sjkim 7316303Sjkim/****************************************************************************** 8316303Sjkim * 9316303Sjkim * 1. Copyright Notice 10316303Sjkim * 11316303Sjkim * Some or all of this work - Copyright (c) 1999 - 2017, Intel Corp. 12193267Sjkim * All rights reserved. 13193267Sjkim * 14316303Sjkim * 2. License 15316303Sjkim * 16316303Sjkim * 2.1. This is your license from Intel Corp. under its intellectual property 17316303Sjkim * rights. You may have additional license terms from the party that provided 18316303Sjkim * you this software, covering your right to use that party's intellectual 19316303Sjkim * property rights. 20316303Sjkim * 21316303Sjkim * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22316303Sjkim * copy of the source code appearing in this file ("Covered Code") an 23316303Sjkim * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24316303Sjkim * base code distributed originally by Intel ("Original Intel Code") to copy, 25316303Sjkim * make derivatives, distribute, use and display any portion of the Covered 26316303Sjkim * Code in any form, with the right to sublicense such rights; and 27316303Sjkim * 28316303Sjkim * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29316303Sjkim * license (with the right to sublicense), under only those claims of Intel 30316303Sjkim * patents that are infringed by the Original Intel Code, to make, use, sell, 31316303Sjkim * offer to sell, and import the Covered Code and derivative works thereof 32316303Sjkim * solely to the minimum extent necessary to exercise the above copyright 33316303Sjkim * license, and in no event shall the patent license extend to any additions 34316303Sjkim * to or modifications of the Original Intel Code. No other license or right 35316303Sjkim * is granted directly or by implication, estoppel or otherwise; 36316303Sjkim * 37316303Sjkim * The above copyright and patent license is granted only if the following 38316303Sjkim * conditions are met: 39316303Sjkim * 40316303Sjkim * 3. Conditions 41316303Sjkim * 42316303Sjkim * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43316303Sjkim * Redistribution of source code of any substantial portion of the Covered 44316303Sjkim * Code or modification with rights to further distribute source must include 45316303Sjkim * the above Copyright Notice, the above License, this list of Conditions, 46316303Sjkim * and the following Disclaimer and Export Compliance provision. In addition, 47316303Sjkim * Licensee must cause all Covered Code to which Licensee contributes to 48316303Sjkim * contain a file documenting the changes Licensee made to create that Covered 49316303Sjkim * Code and the date of any change. Licensee must include in that file the 50316303Sjkim * documentation of any changes made by any predecessor Licensee. Licensee 51316303Sjkim * must include a prominent statement that the modification is derived, 52316303Sjkim * directly or indirectly, from Original Intel Code. 53316303Sjkim * 54316303Sjkim * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55316303Sjkim * Redistribution of source code of any substantial portion of the Covered 56316303Sjkim * Code or modification without rights to further distribute source must 57316303Sjkim * include the following Disclaimer and Export Compliance provision in the 58316303Sjkim * documentation and/or other materials provided with distribution. In 59316303Sjkim * addition, Licensee may not authorize further sublicense of source of any 60316303Sjkim * portion of the Covered Code, and must include terms to the effect that the 61316303Sjkim * license from Licensee to its licensee is limited to the intellectual 62316303Sjkim * property embodied in the software Licensee provides to its licensee, and 63316303Sjkim * not to intellectual property embodied in modifications its licensee may 64316303Sjkim * make. 65316303Sjkim * 66316303Sjkim * 3.3. Redistribution of Executable. Redistribution in executable form of any 67316303Sjkim * substantial portion of the Covered Code or modification must reproduce the 68316303Sjkim * above Copyright Notice, and the following Disclaimer and Export Compliance 69316303Sjkim * provision in the documentation and/or other materials provided with the 70316303Sjkim * distribution. 71316303Sjkim * 72316303Sjkim * 3.4. Intel retains all right, title, and interest in and to the Original 73316303Sjkim * Intel Code. 74316303Sjkim * 75316303Sjkim * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76316303Sjkim * Intel shall be used in advertising or otherwise to promote the sale, use or 77316303Sjkim * other dealings in products derived from or relating to the Covered Code 78316303Sjkim * without prior written authorization from Intel. 79316303Sjkim * 80316303Sjkim * 4. Disclaimer and Export Compliance 81316303Sjkim * 82316303Sjkim * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83316303Sjkim * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84316303Sjkim * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85316303Sjkim * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86316303Sjkim * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87316303Sjkim * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88316303Sjkim * PARTICULAR PURPOSE. 89316303Sjkim * 90316303Sjkim * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91316303Sjkim * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92316303Sjkim * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93316303Sjkim * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94316303Sjkim * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95316303Sjkim * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96316303Sjkim * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97316303Sjkim * LIMITED REMEDY. 98316303Sjkim * 99316303Sjkim * 4.3. Licensee shall not export, either directly or indirectly, any of this 100316303Sjkim * software or system incorporating such software without first obtaining any 101316303Sjkim * required license or other approval from the U. S. Department of Commerce or 102316303Sjkim * any other agency or department of the United States Government. In the 103316303Sjkim * event Licensee exports any such software from the United States or 104316303Sjkim * re-exports any such software from a foreign destination, Licensee shall 105316303Sjkim * ensure that the distribution and export/re-export of the software is in 106316303Sjkim * compliance with all laws, regulations, orders, or other restrictions of the 107316303Sjkim * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108316303Sjkim * any of its subsidiaries will export/re-export any technical data, process, 109316303Sjkim * software, or service, directly or indirectly, to any country for which the 110316303Sjkim * United States government or any agency thereof requires an export license, 111316303Sjkim * other governmental approval, or letter of assurance, without first obtaining 112316303Sjkim * such license, approval or letter. 113316303Sjkim * 114316303Sjkim ***************************************************************************** 115316303Sjkim * 116316303Sjkim * Alternatively, you may choose to be licensed under the terms of the 117316303Sjkim * following license: 118316303Sjkim * 119217365Sjkim * Redistribution and use in source and binary forms, with or without 120217365Sjkim * modification, are permitted provided that the following conditions 121217365Sjkim * are met: 122217365Sjkim * 1. Redistributions of source code must retain the above copyright 123217365Sjkim * notice, this list of conditions, and the following disclaimer, 124217365Sjkim * without modification. 125217365Sjkim * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126217365Sjkim * substantially similar to the "NO WARRANTY" disclaimer below 127217365Sjkim * ("Disclaimer") and any redistribution must be conditioned upon 128217365Sjkim * including a substantially similar Disclaimer requirement for further 129217365Sjkim * binary redistribution. 130217365Sjkim * 3. Neither the names of the above-listed copyright holders nor the names 131217365Sjkim * of any contributors may be used to endorse or promote products derived 132217365Sjkim * from this software without specific prior written permission. 133193267Sjkim * 134316303Sjkim * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135316303Sjkim * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136316303Sjkim * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137316303Sjkim * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138316303Sjkim * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139316303Sjkim * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140316303Sjkim * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141316303Sjkim * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142316303Sjkim * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143316303Sjkim * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144316303Sjkim * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145316303Sjkim * 146316303Sjkim * Alternatively, you may choose to be licensed under the terms of the 147217365Sjkim * GNU General Public License ("GPL") version 2 as published by the Free 148217365Sjkim * Software Foundation. 149193267Sjkim * 150316303Sjkim *****************************************************************************/ 151193267Sjkim 152193341Sjkim#include <contrib/dev/acpica/include/acpi.h> 153193341Sjkim#include <contrib/dev/acpica/include/accommon.h> 154193267Sjkim 155193267Sjkim#define _COMPONENT ACPI_HARDWARE 156193267Sjkim ACPI_MODULE_NAME ("hwvalid") 157193267Sjkim 158193267Sjkim/* Local prototypes */ 159193267Sjkim 160193267Sjkimstatic ACPI_STATUS 161193267SjkimAcpiHwValidateIoRequest ( 162193267Sjkim ACPI_IO_ADDRESS Address, 163193267Sjkim UINT32 BitWidth); 164193267Sjkim 165193267Sjkim 166193267Sjkim/* 167193267Sjkim * Protected I/O ports. Some ports are always illegal, and some are 168193267Sjkim * conditionally illegal. This table must remain ordered by port address. 169193267Sjkim * 170193267Sjkim * The table is used to implement the Microsoft port access rules that 171193267Sjkim * first appeared in Windows XP. Some ports are always illegal, and some 172193267Sjkim * ports are only illegal if the BIOS calls _OSI with a WinXP string or 173193267Sjkim * later (meaning that the BIOS itelf is post-XP.) 174193267Sjkim * 175193267Sjkim * This provides ACPICA with the desired port protections and 176193267Sjkim * Microsoft compatibility. 177193267Sjkim * 178193267Sjkim * Description of port entries: 179193267Sjkim * DMA: DMA controller 180193267Sjkim * PIC0: Programmable Interrupt Controller (8259A) 181193267Sjkim * PIT1: System Timer 1 182193267Sjkim * PIT2: System Timer 2 failsafe 183193267Sjkim * RTC: Real-time clock 184193267Sjkim * CMOS: Extended CMOS 185193267Sjkim * DMA1: DMA 1 page registers 186193267Sjkim * DMA1L: DMA 1 Ch 0 low page 187193267Sjkim * DMA2: DMA 2 page registers 188193267Sjkim * DMA2L: DMA 2 low page refresh 189193267Sjkim * ARBC: Arbitration control 190193267Sjkim * SETUP: Reserved system board setup 191193267Sjkim * POS: POS channel select 192193267Sjkim * PIC1: Cascaded PIC 193193267Sjkim * IDMA: ISA DMA 194193267Sjkim * ELCR: PIC edge/level registers 195193267Sjkim * PCI: PCI configuration space 196193267Sjkim */ 197193267Sjkimstatic const ACPI_PORT_INFO AcpiProtectedPorts[] = 198193267Sjkim{ 199193267Sjkim {"DMA", 0x0000, 0x000F, ACPI_OSI_WIN_XP}, 200193267Sjkim {"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL}, 201193267Sjkim {"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP}, 202193267Sjkim {"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP}, 203193267Sjkim {"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP}, 204193267Sjkim {"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP}, 205193267Sjkim {"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP}, 206193267Sjkim {"DMA1L", 0x0087, 0x0087, ACPI_OSI_WIN_XP}, 207193267Sjkim {"DMA2", 0x0089, 0x008B, ACPI_OSI_WIN_XP}, 208193267Sjkim {"DMA2L", 0x008F, 0x008F, ACPI_OSI_WIN_XP}, 209193267Sjkim {"ARBC", 0x0090, 0x0091, ACPI_OSI_WIN_XP}, 210193267Sjkim {"SETUP", 0x0093, 0x0094, ACPI_OSI_WIN_XP}, 211193267Sjkim {"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP}, 212193267Sjkim {"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL}, 213193267Sjkim {"IDMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP}, 214193267Sjkim {"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL}, 215193267Sjkim {"PCI", 0x0CF8, 0x0CFF, ACPI_OSI_WIN_XP} 216193267Sjkim}; 217193267Sjkim 218316303Sjkim#define ACPI_PORT_INFO_ENTRIES ACPI_ARRAY_LENGTH (AcpiProtectedPorts) 219193267Sjkim 220193267Sjkim 221193267Sjkim/****************************************************************************** 222193267Sjkim * 223193267Sjkim * FUNCTION: AcpiHwValidateIoRequest 224193267Sjkim * 225193267Sjkim * PARAMETERS: Address Address of I/O port/register 226193267Sjkim * BitWidth Number of bits (8,16,32) 227193267Sjkim * 228193267Sjkim * RETURN: Status 229193267Sjkim * 230193267Sjkim * DESCRIPTION: Validates an I/O request (address/length). Certain ports are 231193267Sjkim * always illegal and some ports are only illegal depending on 232193267Sjkim * the requests the BIOS AML code makes to the predefined 233193267Sjkim * _OSI method. 234193267Sjkim * 235193267Sjkim ******************************************************************************/ 236193267Sjkim 237193267Sjkimstatic ACPI_STATUS 238193267SjkimAcpiHwValidateIoRequest ( 239193267Sjkim ACPI_IO_ADDRESS Address, 240193267Sjkim UINT32 BitWidth) 241193267Sjkim{ 242193267Sjkim UINT32 i; 243193267Sjkim UINT32 ByteWidth; 244193267Sjkim ACPI_IO_ADDRESS LastAddress; 245193267Sjkim const ACPI_PORT_INFO *PortInfo; 246193267Sjkim 247193267Sjkim 248327557Sjkim ACPI_FUNCTION_TRACE (HwValidateIoRequest); 249193267Sjkim 250193267Sjkim 251193267Sjkim /* Supported widths are 8/16/32 */ 252193267Sjkim 253193267Sjkim if ((BitWidth != 8) && 254193267Sjkim (BitWidth != 16) && 255193267Sjkim (BitWidth != 32)) 256193267Sjkim { 257228110Sjkim ACPI_ERROR ((AE_INFO, 258228110Sjkim "Bad BitWidth parameter: %8.8X", BitWidth)); 259327557Sjkim return_ACPI_STATUS (AE_BAD_PARAMETER); 260193267Sjkim } 261193267Sjkim 262193267Sjkim PortInfo = AcpiProtectedPorts; 263193267Sjkim ByteWidth = ACPI_DIV_8 (BitWidth); 264193267Sjkim LastAddress = Address + ByteWidth - 1; 265193267Sjkim 266327557Sjkim ACPI_DEBUG_PRINT ((ACPI_DB_IO, 267327557Sjkim "Address %8.8X%8.8X LastAddress %8.8X%8.8X Length %X", 268281396Sjkim ACPI_FORMAT_UINT64 (Address), ACPI_FORMAT_UINT64 (LastAddress), 269193267Sjkim ByteWidth)); 270193267Sjkim 271193267Sjkim /* Maximum 16-bit address in I/O space */ 272193267Sjkim 273193267Sjkim if (LastAddress > ACPI_UINT16_MAX) 274193267Sjkim { 275193267Sjkim ACPI_ERROR ((AE_INFO, 276281396Sjkim "Illegal I/O port address/length above 64K: %8.8X%8.8X/0x%X", 277281396Sjkim ACPI_FORMAT_UINT64 (Address), ByteWidth)); 278327557Sjkim return_ACPI_STATUS (AE_LIMIT); 279193267Sjkim } 280193267Sjkim 281193267Sjkim /* Exit if requested address is not within the protected port table */ 282193267Sjkim 283193267Sjkim if (Address > AcpiProtectedPorts[ACPI_PORT_INFO_ENTRIES - 1].End) 284193267Sjkim { 285327557Sjkim return_ACPI_STATUS (AE_OK); 286193267Sjkim } 287193267Sjkim 288193267Sjkim /* Check request against the list of protected I/O ports */ 289193267Sjkim 290193267Sjkim for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, PortInfo++) 291193267Sjkim { 292193267Sjkim /* 293193267Sjkim * Check if the requested address range will write to a reserved 294316303Sjkim * port. There are four cases to consider: 295193267Sjkim * 296193267Sjkim * 1) Address range is contained completely in the port address range 297193267Sjkim * 2) Address range overlaps port range at the port range start 298193267Sjkim * 3) Address range overlaps port range at the port range end 299193267Sjkim * 4) Address range completely encompasses the port range 300193267Sjkim */ 301193267Sjkim if ((Address <= PortInfo->End) && (LastAddress >= PortInfo->Start)) 302193267Sjkim { 303193267Sjkim /* Port illegality may depend on the _OSI calls made by the BIOS */ 304193267Sjkim 305193267Sjkim if (AcpiGbl_OsiData >= PortInfo->OsiDependency) 306193267Sjkim { 307327557Sjkim ACPI_DEBUG_PRINT ((ACPI_DB_VALUES, 308327557Sjkim "Denied AML access to port 0x%8.8X%8.8X/%X (%s 0x%.4X-0x%.4X)\n", 309281396Sjkim ACPI_FORMAT_UINT64 (Address), ByteWidth, PortInfo->Name, 310193267Sjkim PortInfo->Start, PortInfo->End)); 311193267Sjkim 312193267Sjkim return_ACPI_STATUS (AE_AML_ILLEGAL_ADDRESS); 313193267Sjkim } 314193267Sjkim } 315193267Sjkim 316193267Sjkim /* Finished if address range ends before the end of this port */ 317193267Sjkim 318193267Sjkim if (LastAddress <= PortInfo->End) 319193267Sjkim { 320193267Sjkim break; 321193267Sjkim } 322193267Sjkim } 323193267Sjkim 324327557Sjkim return_ACPI_STATUS (AE_OK); 325193267Sjkim} 326193267Sjkim 327193267Sjkim 328193267Sjkim/****************************************************************************** 329193267Sjkim * 330193267Sjkim * FUNCTION: AcpiHwReadPort 331193267Sjkim * 332193267Sjkim * PARAMETERS: Address Address of I/O port/register to read 333316303Sjkim * Value Where value (data) is returned 334193267Sjkim * Width Number of bits 335193267Sjkim * 336193267Sjkim * RETURN: Status and value read from port 337193267Sjkim * 338193267Sjkim * DESCRIPTION: Read data from an I/O port or register. This is a front-end 339193267Sjkim * to AcpiOsReadPort that performs validation on both the port 340193267Sjkim * address and the length. 341193267Sjkim * 342193267Sjkim *****************************************************************************/ 343193267Sjkim 344193267SjkimACPI_STATUS 345193267SjkimAcpiHwReadPort ( 346193267Sjkim ACPI_IO_ADDRESS Address, 347193267Sjkim UINT32 *Value, 348193267Sjkim UINT32 Width) 349193267Sjkim{ 350193267Sjkim ACPI_STATUS Status; 351193267Sjkim UINT32 OneByte; 352193267Sjkim UINT32 i; 353193267Sjkim 354193267Sjkim 355209746Sjkim /* Truncate address to 16 bits if requested */ 356209746Sjkim 357209746Sjkim if (AcpiGbl_TruncateIoAddresses) 358209746Sjkim { 359209746Sjkim Address &= ACPI_UINT16_MAX; 360209746Sjkim } 361209746Sjkim 362193267Sjkim /* Validate the entire request and perform the I/O */ 363193267Sjkim 364193267Sjkim Status = AcpiHwValidateIoRequest (Address, Width); 365193267Sjkim if (ACPI_SUCCESS (Status)) 366193267Sjkim { 367193267Sjkim Status = AcpiOsReadPort (Address, Value, Width); 368193267Sjkim return (Status); 369193267Sjkim } 370193267Sjkim 371193267Sjkim if (Status != AE_AML_ILLEGAL_ADDRESS) 372193267Sjkim { 373193267Sjkim return (Status); 374193267Sjkim } 375193267Sjkim 376193267Sjkim /* 377193267Sjkim * There has been a protection violation within the request. Fall 378193267Sjkim * back to byte granularity port I/O and ignore the failing bytes. 379316303Sjkim * This provides compatibility with other ACPI implementations. 380193267Sjkim */ 381193267Sjkim for (i = 0, *Value = 0; i < Width; i += 8) 382193267Sjkim { 383193267Sjkim /* Validate and read one byte */ 384193267Sjkim 385193267Sjkim if (AcpiHwValidateIoRequest (Address, 8) == AE_OK) 386193267Sjkim { 387193267Sjkim Status = AcpiOsReadPort (Address, &OneByte, 8); 388193267Sjkim if (ACPI_FAILURE (Status)) 389193267Sjkim { 390193267Sjkim return (Status); 391193267Sjkim } 392193267Sjkim 393193267Sjkim *Value |= (OneByte << i); 394193267Sjkim } 395193267Sjkim 396193267Sjkim Address++; 397193267Sjkim } 398193267Sjkim 399193267Sjkim return (AE_OK); 400193267Sjkim} 401193267Sjkim 402193267Sjkim 403193267Sjkim/****************************************************************************** 404193267Sjkim * 405193267Sjkim * FUNCTION: AcpiHwWritePort 406193267Sjkim * 407193267Sjkim * PARAMETERS: Address Address of I/O port/register to write 408193267Sjkim * Value Value to write 409193267Sjkim * Width Number of bits 410193267Sjkim * 411193267Sjkim * RETURN: Status 412193267Sjkim * 413193267Sjkim * DESCRIPTION: Write data to an I/O port or register. This is a front-end 414193267Sjkim * to AcpiOsWritePort that performs validation on both the port 415193267Sjkim * address and the length. 416193267Sjkim * 417193267Sjkim *****************************************************************************/ 418193267Sjkim 419193267SjkimACPI_STATUS 420193267SjkimAcpiHwWritePort ( 421193267Sjkim ACPI_IO_ADDRESS Address, 422193267Sjkim UINT32 Value, 423193267Sjkim UINT32 Width) 424193267Sjkim{ 425193267Sjkim ACPI_STATUS Status; 426193267Sjkim UINT32 i; 427193267Sjkim 428193267Sjkim 429209746Sjkim /* Truncate address to 16 bits if requested */ 430209746Sjkim 431209746Sjkim if (AcpiGbl_TruncateIoAddresses) 432209746Sjkim { 433209746Sjkim Address &= ACPI_UINT16_MAX; 434209746Sjkim } 435209746Sjkim 436193267Sjkim /* Validate the entire request and perform the I/O */ 437193267Sjkim 438193267Sjkim Status = AcpiHwValidateIoRequest (Address, Width); 439193267Sjkim if (ACPI_SUCCESS (Status)) 440193267Sjkim { 441193267Sjkim Status = AcpiOsWritePort (Address, Value, Width); 442193267Sjkim return (Status); 443193267Sjkim } 444193267Sjkim 445193267Sjkim if (Status != AE_AML_ILLEGAL_ADDRESS) 446193267Sjkim { 447193267Sjkim return (Status); 448193267Sjkim } 449193267Sjkim 450193267Sjkim /* 451193267Sjkim * There has been a protection violation within the request. Fall 452193267Sjkim * back to byte granularity port I/O and ignore the failing bytes. 453316303Sjkim * This provides compatibility with other ACPI implementations. 454193267Sjkim */ 455193267Sjkim for (i = 0; i < Width; i += 8) 456193267Sjkim { 457193267Sjkim /* Validate and write one byte */ 458193267Sjkim 459193267Sjkim if (AcpiHwValidateIoRequest (Address, 8) == AE_OK) 460193267Sjkim { 461193267Sjkim Status = AcpiOsWritePort (Address, (Value >> i) & 0xFF, 8); 462193267Sjkim if (ACPI_FAILURE (Status)) 463193267Sjkim { 464193267Sjkim return (Status); 465193267Sjkim } 466193267Sjkim } 467193267Sjkim 468193267Sjkim Address++; 469193267Sjkim } 470193267Sjkim 471193267Sjkim return (AE_OK); 472193267Sjkim} 473