hwvalid.c revision 1.1.1.2.4.2
1 1.1.1.2.4.2 rmind 2 1.1.1.2.4.2 rmind /****************************************************************************** 3 1.1.1.2.4.2 rmind * 4 1.1.1.2.4.2 rmind * Module Name: hwvalid - I/O request validation 5 1.1.1.2.4.2 rmind * 6 1.1.1.2.4.2 rmind *****************************************************************************/ 7 1.1.1.2.4.2 rmind 8 1.1.1.2.4.2 rmind /* 9 1.1.1.2.4.2 rmind * Copyright (C) 2000 - 2011, Intel Corp. 10 1.1.1.2.4.2 rmind * All rights reserved. 11 1.1.1.2.4.2 rmind * 12 1.1.1.2.4.2 rmind * Redistribution and use in source and binary forms, with or without 13 1.1.1.2.4.2 rmind * modification, are permitted provided that the following conditions 14 1.1.1.2.4.2 rmind * are met: 15 1.1.1.2.4.2 rmind * 1. Redistributions of source code must retain the above copyright 16 1.1.1.2.4.2 rmind * notice, this list of conditions, and the following disclaimer, 17 1.1.1.2.4.2 rmind * without modification. 18 1.1.1.2.4.2 rmind * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 1.1.1.2.4.2 rmind * substantially similar to the "NO WARRANTY" disclaimer below 20 1.1.1.2.4.2 rmind * ("Disclaimer") and any redistribution must be conditioned upon 21 1.1.1.2.4.2 rmind * including a substantially similar Disclaimer requirement for further 22 1.1.1.2.4.2 rmind * binary redistribution. 23 1.1.1.2.4.2 rmind * 3. Neither the names of the above-listed copyright holders nor the names 24 1.1.1.2.4.2 rmind * of any contributors may be used to endorse or promote products derived 25 1.1.1.2.4.2 rmind * from this software without specific prior written permission. 26 1.1.1.2.4.2 rmind * 27 1.1.1.2.4.2 rmind * Alternatively, this software may be distributed under the terms of the 28 1.1.1.2.4.2 rmind * GNU General Public License ("GPL") version 2 as published by the Free 29 1.1.1.2.4.2 rmind * Software Foundation. 30 1.1.1.2.4.2 rmind * 31 1.1.1.2.4.2 rmind * NO WARRANTY 32 1.1.1.2.4.2 rmind * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 1.1.1.2.4.2 rmind * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 1.1.1.2.4.2 rmind * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 35 1.1.1.2.4.2 rmind * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 1.1.1.2.4.2 rmind * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 1.1.1.2.4.2 rmind * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 1.1.1.2.4.2 rmind * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 1.1.1.2.4.2 rmind * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 1.1.1.2.4.2 rmind * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 1.1.1.2.4.2 rmind * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 1.1.1.2.4.2 rmind * POSSIBILITY OF SUCH DAMAGES. 43 1.1.1.2.4.2 rmind */ 44 1.1.1.2.4.2 rmind 45 1.1.1.2.4.2 rmind #define __HWVALID_C__ 46 1.1.1.2.4.2 rmind 47 1.1.1.2.4.2 rmind #include "acpi.h" 48 1.1.1.2.4.2 rmind #include "accommon.h" 49 1.1.1.2.4.2 rmind 50 1.1.1.2.4.2 rmind #define _COMPONENT ACPI_HARDWARE 51 1.1.1.2.4.2 rmind ACPI_MODULE_NAME ("hwvalid") 52 1.1.1.2.4.2 rmind 53 1.1.1.2.4.2 rmind /* Local prototypes */ 54 1.1.1.2.4.2 rmind 55 1.1.1.2.4.2 rmind static ACPI_STATUS 56 1.1.1.2.4.2 rmind AcpiHwValidateIoRequest ( 57 1.1.1.2.4.2 rmind ACPI_IO_ADDRESS Address, 58 1.1.1.2.4.2 rmind UINT32 BitWidth); 59 1.1.1.2.4.2 rmind 60 1.1.1.2.4.2 rmind 61 1.1.1.2.4.2 rmind /* 62 1.1.1.2.4.2 rmind * Protected I/O ports. Some ports are always illegal, and some are 63 1.1.1.2.4.2 rmind * conditionally illegal. This table must remain ordered by port address. 64 1.1.1.2.4.2 rmind * 65 1.1.1.2.4.2 rmind * The table is used to implement the Microsoft port access rules that 66 1.1.1.2.4.2 rmind * first appeared in Windows XP. Some ports are always illegal, and some 67 1.1.1.2.4.2 rmind * ports are only illegal if the BIOS calls _OSI with a WinXP string or 68 1.1.1.2.4.2 rmind * later (meaning that the BIOS itelf is post-XP.) 69 1.1.1.2.4.2 rmind * 70 1.1.1.2.4.2 rmind * This provides ACPICA with the desired port protections and 71 1.1.1.2.4.2 rmind * Microsoft compatibility. 72 1.1.1.2.4.2 rmind * 73 1.1.1.2.4.2 rmind * Description of port entries: 74 1.1.1.2.4.2 rmind * DMA: DMA controller 75 1.1.1.2.4.2 rmind * PIC0: Programmable Interrupt Controller (8259A) 76 1.1.1.2.4.2 rmind * PIT1: System Timer 1 77 1.1.1.2.4.2 rmind * PIT2: System Timer 2 failsafe 78 1.1.1.2.4.2 rmind * RTC: Real-time clock 79 1.1.1.2.4.2 rmind * CMOS: Extended CMOS 80 1.1.1.2.4.2 rmind * DMA1: DMA 1 page registers 81 1.1.1.2.4.2 rmind * DMA1L: DMA 1 Ch 0 low page 82 1.1.1.2.4.2 rmind * DMA2: DMA 2 page registers 83 1.1.1.2.4.2 rmind * DMA2L: DMA 2 low page refresh 84 1.1.1.2.4.2 rmind * ARBC: Arbitration control 85 1.1.1.2.4.2 rmind * SETUP: Reserved system board setup 86 1.1.1.2.4.2 rmind * POS: POS channel select 87 1.1.1.2.4.2 rmind * PIC1: Cascaded PIC 88 1.1.1.2.4.2 rmind * IDMA: ISA DMA 89 1.1.1.2.4.2 rmind * ELCR: PIC edge/level registers 90 1.1.1.2.4.2 rmind * PCI: PCI configuration space 91 1.1.1.2.4.2 rmind */ 92 1.1.1.2.4.2 rmind static const ACPI_PORT_INFO AcpiProtectedPorts[] = 93 1.1.1.2.4.2 rmind { 94 1.1.1.2.4.2 rmind {"DMA", 0x0000, 0x000F, ACPI_OSI_WIN_XP}, 95 1.1.1.2.4.2 rmind {"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL}, 96 1.1.1.2.4.2 rmind {"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP}, 97 1.1.1.2.4.2 rmind {"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP}, 98 1.1.1.2.4.2 rmind {"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP}, 99 1.1.1.2.4.2 rmind {"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP}, 100 1.1.1.2.4.2 rmind {"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP}, 101 1.1.1.2.4.2 rmind {"DMA1L", 0x0087, 0x0087, ACPI_OSI_WIN_XP}, 102 1.1.1.2.4.2 rmind {"DMA2", 0x0089, 0x008B, ACPI_OSI_WIN_XP}, 103 1.1.1.2.4.2 rmind {"DMA2L", 0x008F, 0x008F, ACPI_OSI_WIN_XP}, 104 1.1.1.2.4.2 rmind {"ARBC", 0x0090, 0x0091, ACPI_OSI_WIN_XP}, 105 1.1.1.2.4.2 rmind {"SETUP", 0x0093, 0x0094, ACPI_OSI_WIN_XP}, 106 1.1.1.2.4.2 rmind {"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP}, 107 1.1.1.2.4.2 rmind {"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL}, 108 1.1.1.2.4.2 rmind {"IDMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP}, 109 1.1.1.2.4.2 rmind {"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL}, 110 1.1.1.2.4.2 rmind {"PCI", 0x0CF8, 0x0CFF, ACPI_OSI_WIN_XP} 111 1.1.1.2.4.2 rmind }; 112 1.1.1.2.4.2 rmind 113 1.1.1.2.4.2 rmind #define ACPI_PORT_INFO_ENTRIES ACPI_ARRAY_LENGTH (AcpiProtectedPorts) 114 1.1.1.2.4.2 rmind 115 1.1.1.2.4.2 rmind 116 1.1.1.2.4.2 rmind /****************************************************************************** 117 1.1.1.2.4.2 rmind * 118 1.1.1.2.4.2 rmind * FUNCTION: AcpiHwValidateIoRequest 119 1.1.1.2.4.2 rmind * 120 1.1.1.2.4.2 rmind * PARAMETERS: Address Address of I/O port/register 121 1.1.1.2.4.2 rmind * BitWidth Number of bits (8,16,32) 122 1.1.1.2.4.2 rmind * 123 1.1.1.2.4.2 rmind * RETURN: Status 124 1.1.1.2.4.2 rmind * 125 1.1.1.2.4.2 rmind * DESCRIPTION: Validates an I/O request (address/length). Certain ports are 126 1.1.1.2.4.2 rmind * always illegal and some ports are only illegal depending on 127 1.1.1.2.4.2 rmind * the requests the BIOS AML code makes to the predefined 128 1.1.1.2.4.2 rmind * _OSI method. 129 1.1.1.2.4.2 rmind * 130 1.1.1.2.4.2 rmind ******************************************************************************/ 131 1.1.1.2.4.2 rmind 132 1.1.1.2.4.2 rmind static ACPI_STATUS 133 1.1.1.2.4.2 rmind AcpiHwValidateIoRequest ( 134 1.1.1.2.4.2 rmind ACPI_IO_ADDRESS Address, 135 1.1.1.2.4.2 rmind UINT32 BitWidth) 136 1.1.1.2.4.2 rmind { 137 1.1.1.2.4.2 rmind UINT32 i; 138 1.1.1.2.4.2 rmind UINT32 ByteWidth; 139 1.1.1.2.4.2 rmind ACPI_IO_ADDRESS LastAddress; 140 1.1.1.2.4.2 rmind const ACPI_PORT_INFO *PortInfo; 141 1.1.1.2.4.2 rmind 142 1.1.1.2.4.2 rmind 143 1.1.1.2.4.2 rmind ACPI_FUNCTION_TRACE (HwValidateIoRequest); 144 1.1.1.2.4.2 rmind 145 1.1.1.2.4.2 rmind 146 1.1.1.2.4.2 rmind /* Supported widths are 8/16/32 */ 147 1.1.1.2.4.2 rmind 148 1.1.1.2.4.2 rmind if ((BitWidth != 8) && 149 1.1.1.2.4.2 rmind (BitWidth != 16) && 150 1.1.1.2.4.2 rmind (BitWidth != 32)) 151 1.1.1.2.4.2 rmind { 152 1.1.1.2.4.2 rmind return (AE_BAD_PARAMETER); 153 1.1.1.2.4.2 rmind } 154 1.1.1.2.4.2 rmind 155 1.1.1.2.4.2 rmind PortInfo = AcpiProtectedPorts; 156 1.1.1.2.4.2 rmind ByteWidth = ACPI_DIV_8 (BitWidth); 157 1.1.1.2.4.2 rmind LastAddress = Address + ByteWidth - 1; 158 1.1.1.2.4.2 rmind 159 1.1.1.2.4.2 rmind ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Address %p LastAddress %p Length %X", 160 1.1.1.2.4.2 rmind ACPI_CAST_PTR (void, Address), ACPI_CAST_PTR (void, LastAddress), 161 1.1.1.2.4.2 rmind ByteWidth)); 162 1.1.1.2.4.2 rmind 163 1.1.1.2.4.2 rmind /* Maximum 16-bit address in I/O space */ 164 1.1.1.2.4.2 rmind 165 1.1.1.2.4.2 rmind if (LastAddress > ACPI_UINT16_MAX) 166 1.1.1.2.4.2 rmind { 167 1.1.1.2.4.2 rmind ACPI_ERROR ((AE_INFO, 168 1.1.1.2.4.2 rmind "Illegal I/O port address/length above 64K: %p/0x%X", 169 1.1.1.2.4.2 rmind ACPI_CAST_PTR (void, Address), ByteWidth)); 170 1.1.1.2.4.2 rmind return_ACPI_STATUS (AE_LIMIT); 171 1.1.1.2.4.2 rmind } 172 1.1.1.2.4.2 rmind 173 1.1.1.2.4.2 rmind /* Exit if requested address is not within the protected port table */ 174 1.1.1.2.4.2 rmind 175 1.1.1.2.4.2 rmind if (Address > AcpiProtectedPorts[ACPI_PORT_INFO_ENTRIES - 1].End) 176 1.1.1.2.4.2 rmind { 177 1.1.1.2.4.2 rmind return_ACPI_STATUS (AE_OK); 178 1.1.1.2.4.2 rmind } 179 1.1.1.2.4.2 rmind 180 1.1.1.2.4.2 rmind /* Check request against the list of protected I/O ports */ 181 1.1.1.2.4.2 rmind 182 1.1.1.2.4.2 rmind for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, PortInfo++) 183 1.1.1.2.4.2 rmind { 184 1.1.1.2.4.2 rmind /* 185 1.1.1.2.4.2 rmind * Check if the requested address range will write to a reserved 186 1.1.1.2.4.2 rmind * port. Four cases to consider: 187 1.1.1.2.4.2 rmind * 188 1.1.1.2.4.2 rmind * 1) Address range is contained completely in the port address range 189 1.1.1.2.4.2 rmind * 2) Address range overlaps port range at the port range start 190 1.1.1.2.4.2 rmind * 3) Address range overlaps port range at the port range end 191 1.1.1.2.4.2 rmind * 4) Address range completely encompasses the port range 192 1.1.1.2.4.2 rmind */ 193 1.1.1.2.4.2 rmind if ((Address <= PortInfo->End) && (LastAddress >= PortInfo->Start)) 194 1.1.1.2.4.2 rmind { 195 1.1.1.2.4.2 rmind /* Port illegality may depend on the _OSI calls made by the BIOS */ 196 1.1.1.2.4.2 rmind 197 1.1.1.2.4.2 rmind if (AcpiGbl_OsiData >= PortInfo->OsiDependency) 198 1.1.1.2.4.2 rmind { 199 1.1.1.2.4.2 rmind ACPI_DEBUG_PRINT ((ACPI_DB_IO, 200 1.1.1.2.4.2 rmind "Denied AML access to port 0x%p/%X (%s 0x%.4X-0x%.4X)", 201 1.1.1.2.4.2 rmind ACPI_CAST_PTR (void, Address), ByteWidth, PortInfo->Name, 202 1.1.1.2.4.2 rmind PortInfo->Start, PortInfo->End)); 203 1.1.1.2.4.2 rmind 204 1.1.1.2.4.2 rmind return_ACPI_STATUS (AE_AML_ILLEGAL_ADDRESS); 205 1.1.1.2.4.2 rmind } 206 1.1.1.2.4.2 rmind } 207 1.1.1.2.4.2 rmind 208 1.1.1.2.4.2 rmind /* Finished if address range ends before the end of this port */ 209 1.1.1.2.4.2 rmind 210 1.1.1.2.4.2 rmind if (LastAddress <= PortInfo->End) 211 1.1.1.2.4.2 rmind { 212 1.1.1.2.4.2 rmind break; 213 1.1.1.2.4.2 rmind } 214 1.1.1.2.4.2 rmind } 215 1.1.1.2.4.2 rmind 216 1.1.1.2.4.2 rmind return_ACPI_STATUS (AE_OK); 217 1.1.1.2.4.2 rmind } 218 1.1.1.2.4.2 rmind 219 1.1.1.2.4.2 rmind 220 1.1.1.2.4.2 rmind /****************************************************************************** 221 1.1.1.2.4.2 rmind * 222 1.1.1.2.4.2 rmind * FUNCTION: AcpiHwReadPort 223 1.1.1.2.4.2 rmind * 224 1.1.1.2.4.2 rmind * PARAMETERS: Address Address of I/O port/register to read 225 1.1.1.2.4.2 rmind * Value Where value is placed 226 1.1.1.2.4.2 rmind * Width Number of bits 227 1.1.1.2.4.2 rmind * 228 1.1.1.2.4.2 rmind * RETURN: Status and value read from port 229 1.1.1.2.4.2 rmind * 230 1.1.1.2.4.2 rmind * DESCRIPTION: Read data from an I/O port or register. This is a front-end 231 1.1.1.2.4.2 rmind * to AcpiOsReadPort that performs validation on both the port 232 1.1.1.2.4.2 rmind * address and the length. 233 1.1.1.2.4.2 rmind * 234 1.1.1.2.4.2 rmind *****************************************************************************/ 235 1.1.1.2.4.2 rmind 236 1.1.1.2.4.2 rmind ACPI_STATUS 237 1.1.1.2.4.2 rmind AcpiHwReadPort ( 238 1.1.1.2.4.2 rmind ACPI_IO_ADDRESS Address, 239 1.1.1.2.4.2 rmind UINT32 *Value, 240 1.1.1.2.4.2 rmind UINT32 Width) 241 1.1.1.2.4.2 rmind { 242 1.1.1.2.4.2 rmind ACPI_STATUS Status; 243 1.1.1.2.4.2 rmind UINT32 OneByte; 244 1.1.1.2.4.2 rmind UINT32 i; 245 1.1.1.2.4.2 rmind 246 1.1.1.2.4.2 rmind 247 1.1.1.2.4.2 rmind /* Truncate address to 16 bits if requested */ 248 1.1.1.2.4.2 rmind 249 1.1.1.2.4.2 rmind if (AcpiGbl_TruncateIoAddresses) 250 1.1.1.2.4.2 rmind { 251 1.1.1.2.4.2 rmind Address &= ACPI_UINT16_MAX; 252 1.1.1.2.4.2 rmind } 253 1.1.1.2.4.2 rmind 254 1.1.1.2.4.2 rmind /* Validate the entire request and perform the I/O */ 255 1.1.1.2.4.2 rmind 256 1.1.1.2.4.2 rmind Status = AcpiHwValidateIoRequest (Address, Width); 257 1.1.1.2.4.2 rmind if (ACPI_SUCCESS (Status)) 258 1.1.1.2.4.2 rmind { 259 1.1.1.2.4.2 rmind Status = AcpiOsReadPort (Address, Value, Width); 260 1.1.1.2.4.2 rmind return (Status); 261 1.1.1.2.4.2 rmind } 262 1.1.1.2.4.2 rmind 263 1.1.1.2.4.2 rmind if (Status != AE_AML_ILLEGAL_ADDRESS) 264 1.1.1.2.4.2 rmind { 265 1.1.1.2.4.2 rmind return (Status); 266 1.1.1.2.4.2 rmind } 267 1.1.1.2.4.2 rmind 268 1.1.1.2.4.2 rmind /* 269 1.1.1.2.4.2 rmind * There has been a protection violation within the request. Fall 270 1.1.1.2.4.2 rmind * back to byte granularity port I/O and ignore the failing bytes. 271 1.1.1.2.4.2 rmind * This provides Windows compatibility. 272 1.1.1.2.4.2 rmind */ 273 1.1.1.2.4.2 rmind for (i = 0, *Value = 0; i < Width; i += 8) 274 1.1.1.2.4.2 rmind { 275 1.1.1.2.4.2 rmind /* Validate and read one byte */ 276 1.1.1.2.4.2 rmind 277 1.1.1.2.4.2 rmind if (AcpiHwValidateIoRequest (Address, 8) == AE_OK) 278 1.1.1.2.4.2 rmind { 279 1.1.1.2.4.2 rmind Status = AcpiOsReadPort (Address, &OneByte, 8); 280 1.1.1.2.4.2 rmind if (ACPI_FAILURE (Status)) 281 1.1.1.2.4.2 rmind { 282 1.1.1.2.4.2 rmind return (Status); 283 1.1.1.2.4.2 rmind } 284 1.1.1.2.4.2 rmind 285 1.1.1.2.4.2 rmind *Value |= (OneByte << i); 286 1.1.1.2.4.2 rmind } 287 1.1.1.2.4.2 rmind 288 1.1.1.2.4.2 rmind Address++; 289 1.1.1.2.4.2 rmind } 290 1.1.1.2.4.2 rmind 291 1.1.1.2.4.2 rmind return (AE_OK); 292 1.1.1.2.4.2 rmind } 293 1.1.1.2.4.2 rmind 294 1.1.1.2.4.2 rmind 295 1.1.1.2.4.2 rmind /****************************************************************************** 296 1.1.1.2.4.2 rmind * 297 1.1.1.2.4.2 rmind * FUNCTION: AcpiHwWritePort 298 1.1.1.2.4.2 rmind * 299 1.1.1.2.4.2 rmind * PARAMETERS: Address Address of I/O port/register to write 300 1.1.1.2.4.2 rmind * Value Value to write 301 1.1.1.2.4.2 rmind * Width Number of bits 302 1.1.1.2.4.2 rmind * 303 1.1.1.2.4.2 rmind * RETURN: Status 304 1.1.1.2.4.2 rmind * 305 1.1.1.2.4.2 rmind * DESCRIPTION: Write data to an I/O port or register. This is a front-end 306 1.1.1.2.4.2 rmind * to AcpiOsWritePort that performs validation on both the port 307 1.1.1.2.4.2 rmind * address and the length. 308 1.1.1.2.4.2 rmind * 309 1.1.1.2.4.2 rmind *****************************************************************************/ 310 1.1.1.2.4.2 rmind 311 1.1.1.2.4.2 rmind ACPI_STATUS 312 1.1.1.2.4.2 rmind AcpiHwWritePort ( 313 1.1.1.2.4.2 rmind ACPI_IO_ADDRESS Address, 314 1.1.1.2.4.2 rmind UINT32 Value, 315 1.1.1.2.4.2 rmind UINT32 Width) 316 1.1.1.2.4.2 rmind { 317 1.1.1.2.4.2 rmind ACPI_STATUS Status; 318 1.1.1.2.4.2 rmind UINT32 i; 319 1.1.1.2.4.2 rmind 320 1.1.1.2.4.2 rmind 321 1.1.1.2.4.2 rmind /* Truncate address to 16 bits if requested */ 322 1.1.1.2.4.2 rmind 323 1.1.1.2.4.2 rmind if (AcpiGbl_TruncateIoAddresses) 324 1.1.1.2.4.2 rmind { 325 1.1.1.2.4.2 rmind Address &= ACPI_UINT16_MAX; 326 1.1.1.2.4.2 rmind } 327 1.1.1.2.4.2 rmind 328 1.1.1.2.4.2 rmind /* Validate the entire request and perform the I/O */ 329 1.1.1.2.4.2 rmind 330 1.1.1.2.4.2 rmind Status = AcpiHwValidateIoRequest (Address, Width); 331 1.1.1.2.4.2 rmind if (ACPI_SUCCESS (Status)) 332 1.1.1.2.4.2 rmind { 333 1.1.1.2.4.2 rmind Status = AcpiOsWritePort (Address, Value, Width); 334 1.1.1.2.4.2 rmind return (Status); 335 1.1.1.2.4.2 rmind } 336 1.1.1.2.4.2 rmind 337 1.1.1.2.4.2 rmind if (Status != AE_AML_ILLEGAL_ADDRESS) 338 1.1.1.2.4.2 rmind { 339 1.1.1.2.4.2 rmind return (Status); 340 1.1.1.2.4.2 rmind } 341 1.1.1.2.4.2 rmind 342 1.1.1.2.4.2 rmind /* 343 1.1.1.2.4.2 rmind * There has been a protection violation within the request. Fall 344 1.1.1.2.4.2 rmind * back to byte granularity port I/O and ignore the failing bytes. 345 1.1.1.2.4.2 rmind * This provides Windows compatibility. 346 1.1.1.2.4.2 rmind */ 347 1.1.1.2.4.2 rmind for (i = 0; i < Width; i += 8) 348 1.1.1.2.4.2 rmind { 349 1.1.1.2.4.2 rmind /* Validate and write one byte */ 350 1.1.1.2.4.2 rmind 351 1.1.1.2.4.2 rmind if (AcpiHwValidateIoRequest (Address, 8) == AE_OK) 352 1.1.1.2.4.2 rmind { 353 1.1.1.2.4.2 rmind Status = AcpiOsWritePort (Address, (Value >> i) & 0xFF, 8); 354 1.1.1.2.4.2 rmind if (ACPI_FAILURE (Status)) 355 1.1.1.2.4.2 rmind { 356 1.1.1.2.4.2 rmind return (Status); 357 1.1.1.2.4.2 rmind } 358 1.1.1.2.4.2 rmind } 359 1.1.1.2.4.2 rmind 360 1.1.1.2.4.2 rmind Address++; 361 1.1.1.2.4.2 rmind } 362 1.1.1.2.4.2 rmind 363 1.1.1.2.4.2 rmind return (AE_OK); 364 1.1.1.2.4.2 rmind } 365 1.1.1.2.4.2 rmind 366 1.1.1.2.4.2 rmind 367
Indexes created Thu Oct 02 10:09:58 GMT 2025