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1498 | serge | 1 | |
2 | * |
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3 | * Module Name: hwvalid - I/O request validation |
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4 | * |
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5 | *****************************************************************************/ |
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6 | |||
7 | |||
8 | * |
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9 | * 1. Copyright Notice |
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10 | * |
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11 | * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp. |
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2216 | Serge | 12 | * All rights reserved. |
1498 | serge | 13 | * |
14 | * 2. License |
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15 | * |
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16 | * 2.1. This is your license from Intel Corp. under its intellectual property |
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17 | * rights. You may have additional license terms from the party that provided |
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18 | * you this software, covering your right to use that party's intellectual |
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19 | * property rights. |
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20 | * |
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21 | * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a |
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22 | * copy of the source code appearing in this file ("Covered Code") an |
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23 | * irrevocable, perpetual, worldwide license under Intel's copyrights in the |
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24 | * base code distributed originally by Intel ("Original Intel Code") to copy, |
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25 | * make derivatives, distribute, use and display any portion of the Covered |
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26 | * Code in any form, with the right to sublicense such rights; and |
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27 | * |
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28 | * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent |
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29 | * license (with the right to sublicense), under only those claims of Intel |
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30 | * patents that are infringed by the Original Intel Code, to make, use, sell, |
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31 | * offer to sell, and import the Covered Code and derivative works thereof |
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32 | * solely to the minimum extent necessary to exercise the above copyright |
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33 | * license, and in no event shall the patent license extend to any additions |
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34 | * to or modifications of the Original Intel Code. No other license or right |
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35 | * is granted directly or by implication, estoppel or otherwise; |
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36 | * |
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37 | * The above copyright and patent license is granted only if the following |
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38 | * conditions are met: |
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39 | * |
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40 | * 3. Conditions |
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41 | * |
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42 | * 3.1. Redistribution of Source with Rights to Further Distribute Source. |
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43 | * Redistribution of source code of any substantial portion of the Covered |
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44 | * Code or modification with rights to further distribute source must include |
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45 | * the above Copyright Notice, the above License, this list of Conditions, |
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46 | * and the following Disclaimer and Export Compliance provision. In addition, |
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47 | * Licensee must cause all Covered Code to which Licensee contributes to |
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48 | * contain a file documenting the changes Licensee made to create that Covered |
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49 | * Code and the date of any change. Licensee must include in that file the |
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50 | * documentation of any changes made by any predecessor Licensee. Licensee |
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51 | * must include a prominent statement that the modification is derived, |
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52 | * directly or indirectly, from Original Intel Code. |
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53 | * |
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54 | * 3.2. Redistribution of Source with no Rights to Further Distribute Source. |
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55 | * Redistribution of source code of any substantial portion of the Covered |
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56 | * Code or modification without rights to further distribute source must |
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57 | * include the following Disclaimer and Export Compliance provision in the |
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58 | * documentation and/or other materials provided with distribution. In |
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59 | * addition, Licensee may not authorize further sublicense of source of any |
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60 | * portion of the Covered Code, and must include terms to the effect that the |
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61 | * license from Licensee to its licensee is limited to the intellectual |
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62 | * property embodied in the software Licensee provides to its licensee, and |
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63 | * not to intellectual property embodied in modifications its licensee may |
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64 | * make. |
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65 | * |
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66 | * 3.3. Redistribution of Executable. Redistribution in executable form of any |
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67 | * substantial portion of the Covered Code or modification must reproduce the |
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68 | * above Copyright Notice, and the following Disclaimer and Export Compliance |
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69 | * provision in the documentation and/or other materials provided with the |
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70 | * distribution. |
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71 | * |
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72 | * 3.4. Intel retains all right, title, and interest in and to the Original |
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73 | * Intel Code. |
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74 | * |
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75 | * 3.5. Neither the name Intel nor any other trademark owned or controlled by |
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76 | * Intel shall be used in advertising or otherwise to promote the sale, use or |
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77 | * other dealings in products derived from or relating to the Covered Code |
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78 | * without prior written authorization from Intel. |
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79 | * |
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80 | * 4. Disclaimer and Export Compliance |
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81 | * |
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82 | * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED |
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83 | * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE |
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84 | * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, |
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85 | * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY |
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86 | * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY |
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87 | * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A |
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88 | * PARTICULAR PURPOSE. |
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89 | * |
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90 | * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES |
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91 | * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR |
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92 | * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, |
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93 | * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY |
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94 | * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL |
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95 | * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS |
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96 | * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY |
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97 | * LIMITED REMEDY. |
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98 | * |
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99 | * 4.3. Licensee shall not export, either directly or indirectly, any of this |
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100 | * software or system incorporating such software without first obtaining any |
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101 | * required license or other approval from the U. S. Department of Commerce or |
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102 | * any other agency or department of the United States Government. In the |
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103 | * event Licensee exports any such software from the United States or |
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104 | * re-exports any such software from a foreign destination, Licensee shall |
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105 | * ensure that the distribution and export/re-export of the software is in |
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106 | * compliance with all laws, regulations, orders, or other restrictions of the |
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107 | * U.S. Export Administration Regulations. Licensee agrees that neither it nor |
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108 | * any of its subsidiaries will export/re-export any technical data, process, |
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109 | * software, or service, directly or indirectly, to any country for which the |
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110 | * United States government or any agency thereof requires an export license, |
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111 | * other governmental approval, or letter of assurance, without first obtaining |
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112 | * such license, approval or letter. |
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113 | * |
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114 | *****************************************************************************/ |
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115 | |||
116 | |||
117 | |||
118 | |||
119 | #include "accommon.h" |
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120 | |||
121 | |||
122 | ACPI_MODULE_NAME ("hwvalid") |
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123 | |||
124 | |||
125 | |||
126 | |||
127 | AcpiHwValidateIoRequest ( |
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128 | ACPI_IO_ADDRESS Address, |
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129 | UINT32 BitWidth); |
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130 | |||
131 | |||
132 | |||
133 | * Protected I/O ports. Some ports are always illegal, and some are |
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134 | * conditionally illegal. This table must remain ordered by port address. |
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135 | * |
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136 | * The table is used to implement the Microsoft port access rules that |
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137 | * first appeared in Windows XP. Some ports are always illegal, and some |
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138 | * ports are only illegal if the BIOS calls _OSI with a WinXP string or |
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139 | * later (meaning that the BIOS itelf is post-XP.) |
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140 | * |
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141 | * This provides ACPICA with the desired port protections and |
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142 | * Microsoft compatibility. |
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143 | * |
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144 | * Description of port entries: |
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145 | * DMA: DMA controller |
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146 | * PIC0: Programmable Interrupt Controller (8259A) |
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147 | * PIT1: System Timer 1 |
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148 | * PIT2: System Timer 2 failsafe |
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149 | * RTC: Real-time clock |
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150 | * CMOS: Extended CMOS |
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151 | * DMA1: DMA 1 page registers |
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152 | * DMA1L: DMA 1 Ch 0 low page |
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153 | * DMA2: DMA 2 page registers |
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154 | * DMA2L: DMA 2 low page refresh |
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155 | * ARBC: Arbitration control |
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156 | * SETUP: Reserved system board setup |
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157 | * POS: POS channel select |
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158 | * PIC1: Cascaded PIC |
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159 | * IDMA: ISA DMA |
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160 | * ELCR: PIC edge/level registers |
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161 | * PCI: PCI configuration space |
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162 | */ |
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163 | static const ACPI_PORT_INFO AcpiProtectedPorts[] = |
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164 | { |
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165 | {"DMA", 0x0000, 0x000F, ACPI_OSI_WIN_XP}, |
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166 | {"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL}, |
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167 | {"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP}, |
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168 | {"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP}, |
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169 | {"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP}, |
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170 | {"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP}, |
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171 | {"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP}, |
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172 | {"DMA1L", 0x0087, 0x0087, ACPI_OSI_WIN_XP}, |
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173 | {"DMA2", 0x0089, 0x008B, ACPI_OSI_WIN_XP}, |
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174 | {"DMA2L", 0x008F, 0x008F, ACPI_OSI_WIN_XP}, |
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175 | {"ARBC", 0x0090, 0x0091, ACPI_OSI_WIN_XP}, |
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176 | {"SETUP", 0x0093, 0x0094, ACPI_OSI_WIN_XP}, |
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177 | {"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP}, |
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178 | {"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL}, |
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179 | {"IDMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP}, |
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180 | {"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL}, |
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181 | {"PCI", 0x0CF8, 0x0CFF, ACPI_OSI_WIN_XP} |
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182 | }; |
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183 | |||
184 | |||
185 | |||
186 | |||
187 | |||
188 | * |
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189 | * FUNCTION: AcpiHwValidateIoRequest |
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190 | * |
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191 | * PARAMETERS: Address Address of I/O port/register |
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192 | * BitWidth Number of bits (8,16,32) |
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193 | * |
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194 | * RETURN: Status |
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195 | * |
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196 | * DESCRIPTION: Validates an I/O request (address/length). Certain ports are |
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197 | * always illegal and some ports are only illegal depending on |
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198 | * the requests the BIOS AML code makes to the predefined |
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199 | * _OSI method. |
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200 | * |
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201 | ******************************************************************************/ |
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202 | |||
203 | |||
204 | AcpiHwValidateIoRequest ( |
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205 | ACPI_IO_ADDRESS Address, |
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206 | UINT32 BitWidth) |
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207 | { |
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208 | UINT32 i; |
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209 | UINT32 ByteWidth; |
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210 | ACPI_IO_ADDRESS LastAddress; |
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211 | const ACPI_PORT_INFO *PortInfo; |
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212 | |||
213 | |||
214 | |||
215 | |||
216 | |||
217 | |||
218 | |||
219 | |||
220 | (BitWidth != 16) && |
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221 | (BitWidth != 32)) |
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222 | { |
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223 | return (AE_BAD_PARAMETER); |
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224 | } |
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225 | |||
226 | |||
227 | ByteWidth = ACPI_DIV_8 (BitWidth); |
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228 | LastAddress = Address + ByteWidth - 1; |
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229 | |||
230 | |||
231 | ACPI_CAST_PTR (void, Address), ACPI_CAST_PTR (void, LastAddress), |
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232 | ByteWidth)); |
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233 | |||
234 | |||
235 | |||
236 | |||
237 | { |
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238 | ACPI_ERROR ((AE_INFO, |
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239 | "Illegal I/O port address/length above 64K: %p/0x%X", |
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240 | ACPI_CAST_PTR (void, Address), ByteWidth)); |
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241 | return_ACPI_STATUS (AE_LIMIT); |
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242 | } |
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243 | |||
244 | |||
245 | |||
246 | |||
247 | { |
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248 | return_ACPI_STATUS (AE_OK); |
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249 | } |
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250 | |||
251 | |||
252 | |||
253 | |||
254 | { |
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255 | /* |
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256 | * Check if the requested address range will write to a reserved |
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257 | * port. Four cases to consider: |
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258 | * |
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259 | * 1) Address range is contained completely in the port address range |
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260 | * 2) Address range overlaps port range at the port range start |
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261 | * 3) Address range overlaps port range at the port range end |
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262 | * 4) Address range completely encompasses the port range |
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263 | */ |
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264 | if ((Address <= PortInfo->End) && (LastAddress >= PortInfo->Start)) |
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265 | { |
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266 | /* Port illegality may depend on the _OSI calls made by the BIOS */ |
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267 | |||
268 | |||
269 | { |
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270 | ACPI_DEBUG_PRINT ((ACPI_DB_IO, |
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271 | "Denied AML access to port 0x%p/%X (%s 0x%.4X-0x%.4X)", |
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272 | ACPI_CAST_PTR (void, Address), ByteWidth, PortInfo->Name, |
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273 | PortInfo->Start, PortInfo->End)); |
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274 | |||
275 | |||
276 | } |
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277 | } |
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278 | |||
279 | |||
280 | |||
281 | |||
282 | { |
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283 | break; |
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284 | } |
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285 | } |
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286 | |||
287 | |||
288 | } |
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289 | |||
290 | |||
291 | |||
292 | * |
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293 | * FUNCTION: AcpiHwReadPort |
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294 | * |
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295 | * PARAMETERS: Address Address of I/O port/register to read |
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296 | * Value Where value is placed |
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297 | * Width Number of bits |
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298 | * |
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299 | * RETURN: Status and value read from port |
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300 | * |
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301 | * DESCRIPTION: Read data from an I/O port or register. This is a front-end |
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302 | * to AcpiOsReadPort that performs validation on both the port |
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303 | * address and the length. |
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304 | * |
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305 | *****************************************************************************/ |
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306 | |||
307 | |||
308 | AcpiHwReadPort ( |
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309 | ACPI_IO_ADDRESS Address, |
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310 | UINT32 *Value, |
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311 | UINT32 Width) |
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312 | { |
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313 | ACPI_STATUS Status; |
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314 | UINT32 OneByte; |
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315 | UINT32 i; |
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316 | |||
317 | |||
318 | |||
319 | |||
320 | |||
321 | { |
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322 | Address &= ACPI_UINT16_MAX; |
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323 | } |
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324 | |||
325 | |||
326 | |||
327 | |||
328 | if (ACPI_SUCCESS (Status)) |
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329 | { |
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330 | Status = AcpiOsReadPort (Address, Value, Width); |
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331 | return (Status); |
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332 | } |
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333 | |||
334 | |||
335 | { |
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336 | return (Status); |
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337 | } |
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338 | |||
339 | |||
340 | * There has been a protection violation within the request. Fall |
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341 | * back to byte granularity port I/O and ignore the failing bytes. |
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342 | * This provides Windows compatibility. |
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343 | */ |
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344 | for (i = 0, *Value = 0; i < Width; i += 8) |
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345 | { |
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346 | /* Validate and read one byte */ |
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347 | |||
348 | |||
349 | { |
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350 | Status = AcpiOsReadPort (Address, &OneByte, 8); |
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351 | if (ACPI_FAILURE (Status)) |
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352 | { |
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353 | return (Status); |
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354 | } |
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355 | |||
356 | |||
357 | } |
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358 | |||
359 | |||
360 | } |
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361 | |||
362 | |||
363 | } |
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364 | |||
365 | |||
366 | |||
367 | * |
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368 | * FUNCTION: AcpiHwWritePort |
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369 | * |
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370 | * PARAMETERS: Address Address of I/O port/register to write |
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371 | * Value Value to write |
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372 | * Width Number of bits |
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373 | * |
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374 | * RETURN: Status |
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375 | * |
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376 | * DESCRIPTION: Write data to an I/O port or register. This is a front-end |
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377 | * to AcpiOsWritePort that performs validation on both the port |
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378 | * address and the length. |
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379 | * |
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380 | *****************************************************************************/ |
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381 | |||
382 | |||
383 | AcpiHwWritePort ( |
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384 | ACPI_IO_ADDRESS Address, |
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385 | UINT32 Value, |
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386 | UINT32 Width) |
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387 | { |
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388 | ACPI_STATUS Status; |
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389 | UINT32 i; |
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390 | |||
391 | |||
392 | |||
393 | |||
394 | |||
395 | { |
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396 | Address &= ACPI_UINT16_MAX; |
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397 | } |
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398 | |||
399 | |||
400 | |||
401 | |||
402 | if (ACPI_SUCCESS (Status)) |
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403 | { |
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404 | Status = AcpiOsWritePort (Address, Value, Width); |
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405 | return (Status); |
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406 | } |
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407 | |||
408 | |||
409 | { |
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410 | return (Status); |
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411 | } |
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412 | |||
413 | |||
414 | * There has been a protection violation within the request. Fall |
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415 | * back to byte granularity port I/O and ignore the failing bytes. |
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416 | * This provides Windows compatibility. |
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417 | */ |
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418 | for (i = 0; i < Width; i += 8) |
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419 | { |
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420 | /* Validate and write one byte */ |
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421 | |||
422 | |||
423 | { |
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424 | Status = AcpiOsWritePort (Address, (Value >> i) & 0xFF, 8); |
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425 | if (ACPI_FAILURE (Status)) |
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426 | { |
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427 | return (Status); |
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428 | } |
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429 | } |
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430 | |||
431 | |||
432 | } |
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433 | |||
434 | |||
435 | }>><>>=>=>> |
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436 |