hwvalid.c revision 1.1.1.2.2.2
1 1.1.1.2.2.2 bouyer 2 1.1.1.2.2.2 bouyer /****************************************************************************** 3 1.1.1.2.2.2 bouyer * 4 1.1.1.2.2.2 bouyer * Module Name: hwvalid - I/O request validation 5 1.1.1.2.2.2 bouyer * 6 1.1.1.2.2.2 bouyer *****************************************************************************/ 7 1.1.1.2.2.2 bouyer 8 1.1.1.2.2.2 bouyer /* 9 1.1.1.2.2.2 bouyer * Copyright (C) 2000 - 2011, Intel Corp. 10 1.1.1.2.2.2 bouyer * All rights reserved. 11 1.1.1.2.2.2 bouyer * 12 1.1.1.2.2.2 bouyer * Redistribution and use in source and binary forms, with or without 13 1.1.1.2.2.2 bouyer * modification, are permitted provided that the following conditions 14 1.1.1.2.2.2 bouyer * are met: 15 1.1.1.2.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 16 1.1.1.2.2.2 bouyer * notice, this list of conditions, and the following disclaimer, 17 1.1.1.2.2.2 bouyer * without modification. 18 1.1.1.2.2.2 bouyer * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 1.1.1.2.2.2 bouyer * substantially similar to the "NO WARRANTY" disclaimer below 20 1.1.1.2.2.2 bouyer * ("Disclaimer") and any redistribution must be conditioned upon 21 1.1.1.2.2.2 bouyer * including a substantially similar Disclaimer requirement for further 22 1.1.1.2.2.2 bouyer * binary redistribution. 23 1.1.1.2.2.2 bouyer * 3. Neither the names of the above-listed copyright holders nor the names 24 1.1.1.2.2.2 bouyer * of any contributors may be used to endorse or promote products derived 25 1.1.1.2.2.2 bouyer * from this software without specific prior written permission. 26 1.1.1.2.2.2 bouyer * 27 1.1.1.2.2.2 bouyer * Alternatively, this software may be distributed under the terms of the 28 1.1.1.2.2.2 bouyer * GNU General Public License ("GPL") version 2 as published by the Free 29 1.1.1.2.2.2 bouyer * Software Foundation. 30 1.1.1.2.2.2 bouyer * 31 1.1.1.2.2.2 bouyer * NO WARRANTY 32 1.1.1.2.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 1.1.1.2.2.2 bouyer * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 1.1.1.2.2.2 bouyer * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 35 1.1.1.2.2.2 bouyer * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 1.1.1.2.2.2 bouyer * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 1.1.1.2.2.2 bouyer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 1.1.1.2.2.2 bouyer * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 1.1.1.2.2.2 bouyer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 1.1.1.2.2.2 bouyer * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 1.1.1.2.2.2 bouyer * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 1.1.1.2.2.2 bouyer * POSSIBILITY OF SUCH DAMAGES. 43 1.1.1.2.2.2 bouyer */ 44 1.1.1.2.2.2 bouyer 45 1.1.1.2.2.2 bouyer #define __HWVALID_C__ 46 1.1.1.2.2.2 bouyer 47 1.1.1.2.2.2 bouyer #include "acpi.h" 48 1.1.1.2.2.2 bouyer #include "accommon.h" 49 1.1.1.2.2.2 bouyer 50 1.1.1.2.2.2 bouyer #define _COMPONENT ACPI_HARDWARE 51 1.1.1.2.2.2 bouyer ACPI_MODULE_NAME ("hwvalid") 52 1.1.1.2.2.2 bouyer 53 1.1.1.2.2.2 bouyer /* Local prototypes */ 54 1.1.1.2.2.2 bouyer 55 1.1.1.2.2.2 bouyer static ACPI_STATUS 56 1.1.1.2.2.2 bouyer AcpiHwValidateIoRequest ( 57 1.1.1.2.2.2 bouyer ACPI_IO_ADDRESS Address, 58 1.1.1.2.2.2 bouyer UINT32 BitWidth); 59 1.1.1.2.2.2 bouyer 60 1.1.1.2.2.2 bouyer 61 1.1.1.2.2.2 bouyer /* 62 1.1.1.2.2.2 bouyer * Protected I/O ports. Some ports are always illegal, and some are 63 1.1.1.2.2.2 bouyer * conditionally illegal. This table must remain ordered by port address. 64 1.1.1.2.2.2 bouyer * 65 1.1.1.2.2.2 bouyer * The table is used to implement the Microsoft port access rules that 66 1.1.1.2.2.2 bouyer * first appeared in Windows XP. Some ports are always illegal, and some 67 1.1.1.2.2.2 bouyer * ports are only illegal if the BIOS calls _OSI with a WinXP string or 68 1.1.1.2.2.2 bouyer * later (meaning that the BIOS itelf is post-XP.) 69 1.1.1.2.2.2 bouyer * 70 1.1.1.2.2.2 bouyer * This provides ACPICA with the desired port protections and 71 1.1.1.2.2.2 bouyer * Microsoft compatibility. 72 1.1.1.2.2.2 bouyer * 73 1.1.1.2.2.2 bouyer * Description of port entries: 74 1.1.1.2.2.2 bouyer * DMA: DMA controller 75 1.1.1.2.2.2 bouyer * PIC0: Programmable Interrupt Controller (8259A) 76 1.1.1.2.2.2 bouyer * PIT1: System Timer 1 77 1.1.1.2.2.2 bouyer * PIT2: System Timer 2 failsafe 78 1.1.1.2.2.2 bouyer * RTC: Real-time clock 79 1.1.1.2.2.2 bouyer * CMOS: Extended CMOS 80 1.1.1.2.2.2 bouyer * DMA1: DMA 1 page registers 81 1.1.1.2.2.2 bouyer * DMA1L: DMA 1 Ch 0 low page 82 1.1.1.2.2.2 bouyer * DMA2: DMA 2 page registers 83 1.1.1.2.2.2 bouyer * DMA2L: DMA 2 low page refresh 84 1.1.1.2.2.2 bouyer * ARBC: Arbitration control 85 1.1.1.2.2.2 bouyer * SETUP: Reserved system board setup 86 1.1.1.2.2.2 bouyer * POS: POS channel select 87 1.1.1.2.2.2 bouyer * PIC1: Cascaded PIC 88 1.1.1.2.2.2 bouyer * IDMA: ISA DMA 89 1.1.1.2.2.2 bouyer * ELCR: PIC edge/level registers 90 1.1.1.2.2.2 bouyer * PCI: PCI configuration space 91 1.1.1.2.2.2 bouyer */ 92 1.1.1.2.2.2 bouyer static const ACPI_PORT_INFO AcpiProtectedPorts[] = 93 1.1.1.2.2.2 bouyer { 94 1.1.1.2.2.2 bouyer {"DMA", 0x0000, 0x000F, ACPI_OSI_WIN_XP}, 95 1.1.1.2.2.2 bouyer {"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL}, 96 1.1.1.2.2.2 bouyer {"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP}, 97 1.1.1.2.2.2 bouyer {"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP}, 98 1.1.1.2.2.2 bouyer {"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP}, 99 1.1.1.2.2.2 bouyer {"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP}, 100 1.1.1.2.2.2 bouyer {"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP}, 101 1.1.1.2.2.2 bouyer {"DMA1L", 0x0087, 0x0087, ACPI_OSI_WIN_XP}, 102 1.1.1.2.2.2 bouyer {"DMA2", 0x0089, 0x008B, ACPI_OSI_WIN_XP}, 103 1.1.1.2.2.2 bouyer {"DMA2L", 0x008F, 0x008F, ACPI_OSI_WIN_XP}, 104 1.1.1.2.2.2 bouyer {"ARBC", 0x0090, 0x0091, ACPI_OSI_WIN_XP}, 105 1.1.1.2.2.2 bouyer {"SETUP", 0x0093, 0x0094, ACPI_OSI_WIN_XP}, 106 1.1.1.2.2.2 bouyer {"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP}, 107 1.1.1.2.2.2 bouyer {"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL}, 108 1.1.1.2.2.2 bouyer {"IDMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP}, 109 1.1.1.2.2.2 bouyer {"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL}, 110 1.1.1.2.2.2 bouyer {"PCI", 0x0CF8, 0x0CFF, ACPI_OSI_WIN_XP} 111 1.1.1.2.2.2 bouyer }; 112 1.1.1.2.2.2 bouyer 113 1.1.1.2.2.2 bouyer #define ACPI_PORT_INFO_ENTRIES ACPI_ARRAY_LENGTH (AcpiProtectedPorts) 114 1.1.1.2.2.2 bouyer 115 1.1.1.2.2.2 bouyer 116 1.1.1.2.2.2 bouyer /****************************************************************************** 117 1.1.1.2.2.2 bouyer * 118 1.1.1.2.2.2 bouyer * FUNCTION: AcpiHwValidateIoRequest 119 1.1.1.2.2.2 bouyer * 120 1.1.1.2.2.2 bouyer * PARAMETERS: Address Address of I/O port/register 121 1.1.1.2.2.2 bouyer * BitWidth Number of bits (8,16,32) 122 1.1.1.2.2.2 bouyer * 123 1.1.1.2.2.2 bouyer * RETURN: Status 124 1.1.1.2.2.2 bouyer * 125 1.1.1.2.2.2 bouyer * DESCRIPTION: Validates an I/O request (address/length). Certain ports are 126 1.1.1.2.2.2 bouyer * always illegal and some ports are only illegal depending on 127 1.1.1.2.2.2 bouyer * the requests the BIOS AML code makes to the predefined 128 1.1.1.2.2.2 bouyer * _OSI method. 129 1.1.1.2.2.2 bouyer * 130 1.1.1.2.2.2 bouyer ******************************************************************************/ 131 1.1.1.2.2.2 bouyer 132 1.1.1.2.2.2 bouyer static ACPI_STATUS 133 1.1.1.2.2.2 bouyer AcpiHwValidateIoRequest ( 134 1.1.1.2.2.2 bouyer ACPI_IO_ADDRESS Address, 135 1.1.1.2.2.2 bouyer UINT32 BitWidth) 136 1.1.1.2.2.2 bouyer { 137 1.1.1.2.2.2 bouyer UINT32 i; 138 1.1.1.2.2.2 bouyer UINT32 ByteWidth; 139 1.1.1.2.2.2 bouyer ACPI_IO_ADDRESS LastAddress; 140 1.1.1.2.2.2 bouyer const ACPI_PORT_INFO *PortInfo; 141 1.1.1.2.2.2 bouyer 142 1.1.1.2.2.2 bouyer 143 1.1.1.2.2.2 bouyer ACPI_FUNCTION_TRACE (HwValidateIoRequest); 144 1.1.1.2.2.2 bouyer 145 1.1.1.2.2.2 bouyer 146 1.1.1.2.2.2 bouyer /* Supported widths are 8/16/32 */ 147 1.1.1.2.2.2 bouyer 148 1.1.1.2.2.2 bouyer if ((BitWidth != 8) && 149 1.1.1.2.2.2 bouyer (BitWidth != 16) && 150 1.1.1.2.2.2 bouyer (BitWidth != 32)) 151 1.1.1.2.2.2 bouyer { 152 1.1.1.2.2.2 bouyer return (AE_BAD_PARAMETER); 153 1.1.1.2.2.2 bouyer } 154 1.1.1.2.2.2 bouyer 155 1.1.1.2.2.2 bouyer PortInfo = AcpiProtectedPorts; 156 1.1.1.2.2.2 bouyer ByteWidth = ACPI_DIV_8 (BitWidth); 157 1.1.1.2.2.2 bouyer LastAddress = Address + ByteWidth - 1; 158 1.1.1.2.2.2 bouyer 159 1.1.1.2.2.2 bouyer ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Address %p LastAddress %p Length %X", 160 1.1.1.2.2.2 bouyer ACPI_CAST_PTR (void, Address), ACPI_CAST_PTR (void, LastAddress), 161 1.1.1.2.2.2 bouyer ByteWidth)); 162 1.1.1.2.2.2 bouyer 163 1.1.1.2.2.2 bouyer /* Maximum 16-bit address in I/O space */ 164 1.1.1.2.2.2 bouyer 165 1.1.1.2.2.2 bouyer if (LastAddress > ACPI_UINT16_MAX) 166 1.1.1.2.2.2 bouyer { 167 1.1.1.2.2.2 bouyer ACPI_ERROR ((AE_INFO, 168 1.1.1.2.2.2 bouyer "Illegal I/O port address/length above 64K: %p/0x%X", 169 1.1.1.2.2.2 bouyer ACPI_CAST_PTR (void, Address), ByteWidth)); 170 1.1.1.2.2.2 bouyer return_ACPI_STATUS (AE_LIMIT); 171 1.1.1.2.2.2 bouyer } 172 1.1.1.2.2.2 bouyer 173 1.1.1.2.2.2 bouyer /* Exit if requested address is not within the protected port table */ 174 1.1.1.2.2.2 bouyer 175 1.1.1.2.2.2 bouyer if (Address > AcpiProtectedPorts[ACPI_PORT_INFO_ENTRIES - 1].End) 176 1.1.1.2.2.2 bouyer { 177 1.1.1.2.2.2 bouyer return_ACPI_STATUS (AE_OK); 178 1.1.1.2.2.2 bouyer } 179 1.1.1.2.2.2 bouyer 180 1.1.1.2.2.2 bouyer /* Check request against the list of protected I/O ports */ 181 1.1.1.2.2.2 bouyer 182 1.1.1.2.2.2 bouyer for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, PortInfo++) 183 1.1.1.2.2.2 bouyer { 184 1.1.1.2.2.2 bouyer /* 185 1.1.1.2.2.2 bouyer * Check if the requested address range will write to a reserved 186 1.1.1.2.2.2 bouyer * port. Four cases to consider: 187 1.1.1.2.2.2 bouyer * 188 1.1.1.2.2.2 bouyer * 1) Address range is contained completely in the port address range 189 1.1.1.2.2.2 bouyer * 2) Address range overlaps port range at the port range start 190 1.1.1.2.2.2 bouyer * 3) Address range overlaps port range at the port range end 191 1.1.1.2.2.2 bouyer * 4) Address range completely encompasses the port range 192 1.1.1.2.2.2 bouyer */ 193 1.1.1.2.2.2 bouyer if ((Address <= PortInfo->End) && (LastAddress >= PortInfo->Start)) 194 1.1.1.2.2.2 bouyer { 195 1.1.1.2.2.2 bouyer /* Port illegality may depend on the _OSI calls made by the BIOS */ 196 1.1.1.2.2.2 bouyer 197 1.1.1.2.2.2 bouyer if (AcpiGbl_OsiData >= PortInfo->OsiDependency) 198 1.1.1.2.2.2 bouyer { 199 1.1.1.2.2.2 bouyer ACPI_DEBUG_PRINT ((ACPI_DB_IO, 200 1.1.1.2.2.2 bouyer "Denied AML access to port 0x%p/%X (%s 0x%.4X-0x%.4X)", 201 1.1.1.2.2.2 bouyer ACPI_CAST_PTR (void, Address), ByteWidth, PortInfo->Name, 202 1.1.1.2.2.2 bouyer PortInfo->Start, PortInfo->End)); 203 1.1.1.2.2.2 bouyer 204 1.1.1.2.2.2 bouyer return_ACPI_STATUS (AE_AML_ILLEGAL_ADDRESS); 205 1.1.1.2.2.2 bouyer } 206 1.1.1.2.2.2 bouyer } 207 1.1.1.2.2.2 bouyer 208 1.1.1.2.2.2 bouyer /* Finished if address range ends before the end of this port */ 209 1.1.1.2.2.2 bouyer 210 1.1.1.2.2.2 bouyer if (LastAddress <= PortInfo->End) 211 1.1.1.2.2.2 bouyer { 212 1.1.1.2.2.2 bouyer break; 213 1.1.1.2.2.2 bouyer } 214 1.1.1.2.2.2 bouyer } 215 1.1.1.2.2.2 bouyer 216 1.1.1.2.2.2 bouyer return_ACPI_STATUS (AE_OK); 217 1.1.1.2.2.2 bouyer } 218 1.1.1.2.2.2 bouyer 219 1.1.1.2.2.2 bouyer 220 1.1.1.2.2.2 bouyer /****************************************************************************** 221 1.1.1.2.2.2 bouyer * 222 1.1.1.2.2.2 bouyer * FUNCTION: AcpiHwReadPort 223 1.1.1.2.2.2 bouyer * 224 1.1.1.2.2.2 bouyer * PARAMETERS: Address Address of I/O port/register to read 225 1.1.1.2.2.2 bouyer * Value Where value is placed 226 1.1.1.2.2.2 bouyer * Width Number of bits 227 1.1.1.2.2.2 bouyer * 228 1.1.1.2.2.2 bouyer * RETURN: Status and value read from port 229 1.1.1.2.2.2 bouyer * 230 1.1.1.2.2.2 bouyer * DESCRIPTION: Read data from an I/O port or register. This is a front-end 231 1.1.1.2.2.2 bouyer * to AcpiOsReadPort that performs validation on both the port 232 1.1.1.2.2.2 bouyer * address and the length. 233 1.1.1.2.2.2 bouyer * 234 1.1.1.2.2.2 bouyer *****************************************************************************/ 235 1.1.1.2.2.2 bouyer 236 1.1.1.2.2.2 bouyer ACPI_STATUS 237 1.1.1.2.2.2 bouyer AcpiHwReadPort ( 238 1.1.1.2.2.2 bouyer ACPI_IO_ADDRESS Address, 239 1.1.1.2.2.2 bouyer UINT32 *Value, 240 1.1.1.2.2.2 bouyer UINT32 Width) 241 1.1.1.2.2.2 bouyer { 242 1.1.1.2.2.2 bouyer ACPI_STATUS Status; 243 1.1.1.2.2.2 bouyer UINT32 OneByte; 244 1.1.1.2.2.2 bouyer UINT32 i; 245 1.1.1.2.2.2 bouyer 246 1.1.1.2.2.2 bouyer 247 1.1.1.2.2.2 bouyer /* Truncate address to 16 bits if requested */ 248 1.1.1.2.2.2 bouyer 249 1.1.1.2.2.2 bouyer if (AcpiGbl_TruncateIoAddresses) 250 1.1.1.2.2.2 bouyer { 251 1.1.1.2.2.2 bouyer Address &= ACPI_UINT16_MAX; 252 1.1.1.2.2.2 bouyer } 253 1.1.1.2.2.2 bouyer 254 1.1.1.2.2.2 bouyer /* Validate the entire request and perform the I/O */ 255 1.1.1.2.2.2 bouyer 256 1.1.1.2.2.2 bouyer Status = AcpiHwValidateIoRequest (Address, Width); 257 1.1.1.2.2.2 bouyer if (ACPI_SUCCESS (Status)) 258 1.1.1.2.2.2 bouyer { 259 1.1.1.2.2.2 bouyer Status = AcpiOsReadPort (Address, Value, Width); 260 1.1.1.2.2.2 bouyer return (Status); 261 1.1.1.2.2.2 bouyer } 262 1.1.1.2.2.2 bouyer 263 1.1.1.2.2.2 bouyer if (Status != AE_AML_ILLEGAL_ADDRESS) 264 1.1.1.2.2.2 bouyer { 265 1.1.1.2.2.2 bouyer return (Status); 266 1.1.1.2.2.2 bouyer } 267 1.1.1.2.2.2 bouyer 268 1.1.1.2.2.2 bouyer /* 269 1.1.1.2.2.2 bouyer * There has been a protection violation within the request. Fall 270 1.1.1.2.2.2 bouyer * back to byte granularity port I/O and ignore the failing bytes. 271 1.1.1.2.2.2 bouyer * This provides Windows compatibility. 272 1.1.1.2.2.2 bouyer */ 273 1.1.1.2.2.2 bouyer for (i = 0, *Value = 0; i < Width; i += 8) 274 1.1.1.2.2.2 bouyer { 275 1.1.1.2.2.2 bouyer /* Validate and read one byte */ 276 1.1.1.2.2.2 bouyer 277 1.1.1.2.2.2 bouyer if (AcpiHwValidateIoRequest (Address, 8) == AE_OK) 278 1.1.1.2.2.2 bouyer { 279 1.1.1.2.2.2 bouyer Status = AcpiOsReadPort (Address, &OneByte, 8); 280 1.1.1.2.2.2 bouyer if (ACPI_FAILURE (Status)) 281 1.1.1.2.2.2 bouyer { 282 1.1.1.2.2.2 bouyer return (Status); 283 1.1.1.2.2.2 bouyer } 284 1.1.1.2.2.2 bouyer 285 1.1.1.2.2.2 bouyer *Value |= (OneByte << i); 286 1.1.1.2.2.2 bouyer } 287 1.1.1.2.2.2 bouyer 288 1.1.1.2.2.2 bouyer Address++; 289 1.1.1.2.2.2 bouyer } 290 1.1.1.2.2.2 bouyer 291 1.1.1.2.2.2 bouyer return (AE_OK); 292 1.1.1.2.2.2 bouyer } 293 1.1.1.2.2.2 bouyer 294 1.1.1.2.2.2 bouyer 295 1.1.1.2.2.2 bouyer /****************************************************************************** 296 1.1.1.2.2.2 bouyer * 297 1.1.1.2.2.2 bouyer * FUNCTION: AcpiHwWritePort 298 1.1.1.2.2.2 bouyer * 299 1.1.1.2.2.2 bouyer * PARAMETERS: Address Address of I/O port/register to write 300 1.1.1.2.2.2 bouyer * Value Value to write 301 1.1.1.2.2.2 bouyer * Width Number of bits 302 1.1.1.2.2.2 bouyer * 303 1.1.1.2.2.2 bouyer * RETURN: Status 304 1.1.1.2.2.2 bouyer * 305 1.1.1.2.2.2 bouyer * DESCRIPTION: Write data to an I/O port or register. This is a front-end 306 1.1.1.2.2.2 bouyer * to AcpiOsWritePort that performs validation on both the port 307 1.1.1.2.2.2 bouyer * address and the length. 308 1.1.1.2.2.2 bouyer * 309 1.1.1.2.2.2 bouyer *****************************************************************************/ 310 1.1.1.2.2.2 bouyer 311 1.1.1.2.2.2 bouyer ACPI_STATUS 312 1.1.1.2.2.2 bouyer AcpiHwWritePort ( 313 1.1.1.2.2.2 bouyer ACPI_IO_ADDRESS Address, 314 1.1.1.2.2.2 bouyer UINT32 Value, 315 1.1.1.2.2.2 bouyer UINT32 Width) 316 1.1.1.2.2.2 bouyer { 317 1.1.1.2.2.2 bouyer ACPI_STATUS Status; 318 1.1.1.2.2.2 bouyer UINT32 i; 319 1.1.1.2.2.2 bouyer 320 1.1.1.2.2.2 bouyer 321 1.1.1.2.2.2 bouyer /* Truncate address to 16 bits if requested */ 322 1.1.1.2.2.2 bouyer 323 1.1.1.2.2.2 bouyer if (AcpiGbl_TruncateIoAddresses) 324 1.1.1.2.2.2 bouyer { 325 1.1.1.2.2.2 bouyer Address &= ACPI_UINT16_MAX; 326 1.1.1.2.2.2 bouyer } 327 1.1.1.2.2.2 bouyer 328 1.1.1.2.2.2 bouyer /* Validate the entire request and perform the I/O */ 329 1.1.1.2.2.2 bouyer 330 1.1.1.2.2.2 bouyer Status = AcpiHwValidateIoRequest (Address, Width); 331 1.1.1.2.2.2 bouyer if (ACPI_SUCCESS (Status)) 332 1.1.1.2.2.2 bouyer { 333 1.1.1.2.2.2 bouyer Status = AcpiOsWritePort (Address, Value, Width); 334 1.1.1.2.2.2 bouyer return (Status); 335 1.1.1.2.2.2 bouyer } 336 1.1.1.2.2.2 bouyer 337 1.1.1.2.2.2 bouyer if (Status != AE_AML_ILLEGAL_ADDRESS) 338 1.1.1.2.2.2 bouyer { 339 1.1.1.2.2.2 bouyer return (Status); 340 1.1.1.2.2.2 bouyer } 341 1.1.1.2.2.2 bouyer 342 1.1.1.2.2.2 bouyer /* 343 1.1.1.2.2.2 bouyer * There has been a protection violation within the request. Fall 344 1.1.1.2.2.2 bouyer * back to byte granularity port I/O and ignore the failing bytes. 345 1.1.1.2.2.2 bouyer * This provides Windows compatibility. 346 1.1.1.2.2.2 bouyer */ 347 1.1.1.2.2.2 bouyer for (i = 0; i < Width; i += 8) 348 1.1.1.2.2.2 bouyer { 349 1.1.1.2.2.2 bouyer /* Validate and write one byte */ 350 1.1.1.2.2.2 bouyer 351 1.1.1.2.2.2 bouyer if (AcpiHwValidateIoRequest (Address, 8) == AE_OK) 352 1.1.1.2.2.2 bouyer { 353 1.1.1.2.2.2 bouyer Status = AcpiOsWritePort (Address, (Value >> i) & 0xFF, 8); 354 1.1.1.2.2.2 bouyer if (ACPI_FAILURE (Status)) 355 1.1.1.2.2.2 bouyer { 356 1.1.1.2.2.2 bouyer return (Status); 357 1.1.1.2.2.2 bouyer } 358 1.1.1.2.2.2 bouyer } 359 1.1.1.2.2.2 bouyer 360 1.1.1.2.2.2 bouyer Address++; 361 1.1.1.2.2.2 bouyer } 362 1.1.1.2.2.2 bouyer 363 1.1.1.2.2.2 bouyer return (AE_OK); 364 1.1.1.2.2.2 bouyer } 365 1.1.1.2.2.2 bouyer 366 1.1.1.2.2.2 bouyer 367
Indexes created Thu Oct 02 14:10:14 GMT 2025