439 lines
15 KiB
C
439 lines
15 KiB
C
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/******************************************************************************
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*
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* Module Name: hwvalid - I/O request validation
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __HWVALID_C__
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#include "acpi.h"
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#include "accommon.h"
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME ("hwvalid")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiHwValidateIoRequest (
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ACPI_IO_ADDRESS Address,
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UINT32 BitWidth);
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/*
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* Protected I/O ports. Some ports are always illegal, and some are
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* conditionally illegal. This table must remain ordered by port address.
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*
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* The table is used to implement the Microsoft port access rules that
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* first appeared in Windows XP. Some ports are always illegal, and some
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* ports are only illegal if the BIOS calls _OSI with a WinXP string or
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* later (meaning that the BIOS itelf is post-XP.)
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*
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* This provides ACPICA with the desired port protections and
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* Microsoft compatibility.
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*
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* Description of port entries:
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* DMA: DMA controller
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* PIC0: Programmable Interrupt Controller (8259A)
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* PIT1: System Timer 1
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* PIT2: System Timer 2 failsafe
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* RTC: Real-time clock
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* CMOS: Extended CMOS
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* DMA1: DMA 1 page registers
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* DMA1L: DMA 1 Ch 0 low page
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* DMA2: DMA 2 page registers
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* DMA2L: DMA 2 low page refresh
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* ARBC: Arbitration control
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* SETUP: Reserved system board setup
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* POS: POS channel select
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* PIC1: Cascaded PIC
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* IDMA: ISA DMA
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* ELCR: PIC edge/level registers
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* PCI: PCI configuration space
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*/
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static const ACPI_PORT_INFO AcpiProtectedPorts[] =
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{
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{"DMA", 0x0000, 0x000F, ACPI_OSI_WIN_XP},
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{"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL},
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{"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP},
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{"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP},
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{"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP},
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{"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP},
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{"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP},
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{"DMA1L", 0x0087, 0x0087, ACPI_OSI_WIN_XP},
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{"DMA2", 0x0089, 0x008B, ACPI_OSI_WIN_XP},
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{"DMA2L", 0x008F, 0x008F, ACPI_OSI_WIN_XP},
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{"ARBC", 0x0090, 0x0091, ACPI_OSI_WIN_XP},
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{"SETUP", 0x0093, 0x0094, ACPI_OSI_WIN_XP},
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{"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP},
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{"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL},
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{"IDMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP},
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{"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL},
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{"PCI", 0x0CF8, 0x0CFF, ACPI_OSI_WIN_XP}
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};
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#define ACPI_PORT_INFO_ENTRIES ACPI_ARRAY_LENGTH (AcpiProtectedPorts)
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/******************************************************************************
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*
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* FUNCTION: AcpiHwValidateIoRequest
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*
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* PARAMETERS: Address Address of I/O port/register
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* BitWidth Number of bits (8,16,32)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Validates an I/O request (address/length). Certain ports are
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* always illegal and some ports are only illegal depending on
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* the requests the BIOS AML code makes to the predefined
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* _OSI method.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiHwValidateIoRequest (
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ACPI_IO_ADDRESS Address,
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UINT32 BitWidth)
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{
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UINT32 i;
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UINT32 ByteWidth;
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ACPI_IO_ADDRESS LastAddress;
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const ACPI_PORT_INFO *PortInfo;
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ACPI_FUNCTION_TRACE (HwValidateIoRequest);
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/* Supported widths are 8/16/32 */
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if ((BitWidth != 8) &&
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(BitWidth != 16) &&
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(BitWidth != 32))
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{
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return (AE_BAD_PARAMETER);
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}
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PortInfo = AcpiProtectedPorts;
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ByteWidth = ACPI_DIV_8 (BitWidth);
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LastAddress = Address + ByteWidth - 1;
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ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Address %p LastAddress %p Length %X",
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ACPI_CAST_PTR (void, Address), ACPI_CAST_PTR (void, LastAddress),
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ByteWidth));
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/* Maximum 16-bit address in I/O space */
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if (LastAddress > ACPI_UINT16_MAX)
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{
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ACPI_ERROR ((AE_INFO,
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"Illegal I/O port address/length above 64K: %p/0x%X",
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ACPI_CAST_PTR (void, Address), ByteWidth));
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return_ACPI_STATUS (AE_LIMIT);
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}
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/* Exit if requested address is not within the protected port table */
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if (Address > AcpiProtectedPorts[ACPI_PORT_INFO_ENTRIES - 1].End)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/* Check request against the list of protected I/O ports */
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for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, PortInfo++)
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{
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/*
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* Check if the requested address range will write to a reserved
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* port. Four cases to consider:
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*
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* 1) Address range is contained completely in the port address range
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* 2) Address range overlaps port range at the port range start
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* 3) Address range overlaps port range at the port range end
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* 4) Address range completely encompasses the port range
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*/
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if ((Address <= PortInfo->End) && (LastAddress >= PortInfo->Start))
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{
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/* Port illegality may depend on the _OSI calls made by the BIOS */
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if (AcpiGbl_OsiData >= PortInfo->OsiDependency)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_IO,
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"Denied AML access to port 0x%p/%X (%s 0x%.4X-0x%.4X)",
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ACPI_CAST_PTR (void, Address), ByteWidth, PortInfo->Name,
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PortInfo->Start, PortInfo->End));
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return_ACPI_STATUS (AE_AML_ILLEGAL_ADDRESS);
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}
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}
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/* Finished if address range ends before the end of this port */
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if (LastAddress <= PortInfo->End)
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{
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break;
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}
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}
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return_ACPI_STATUS (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwReadPort
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*
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* PARAMETERS: Address Address of I/O port/register to read
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* Value Where value is placed
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* Width Number of bits
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*
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* RETURN: Status and value read from port
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*
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* DESCRIPTION: Read data from an I/O port or register. This is a front-end
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* to AcpiOsReadPort that performs validation on both the port
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* address and the length.
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*
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*****************************************************************************/
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ACPI_STATUS
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AcpiHwReadPort (
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ACPI_IO_ADDRESS Address,
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UINT32 *Value,
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UINT32 Width)
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{
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ACPI_STATUS Status;
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UINT32 OneByte;
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UINT32 i;
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/* Truncate address to 16 bits if requested */
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if (AcpiGbl_TruncateIoAddresses)
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{
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Address &= ACPI_UINT16_MAX;
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}
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/* Validate the entire request and perform the I/O */
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Status = AcpiHwValidateIoRequest (Address, Width);
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if (ACPI_SUCCESS (Status))
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{
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Status = AcpiOsReadPort (Address, Value, Width);
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return (Status);
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}
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if (Status != AE_AML_ILLEGAL_ADDRESS)
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{
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return (Status);
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}
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/*
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* There has been a protection violation within the request. Fall
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* back to byte granularity port I/O and ignore the failing bytes.
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* This provides Windows compatibility.
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*/
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for (i = 0, *Value = 0; i < Width; i += 8)
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{
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/* Validate and read one byte */
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if (AcpiHwValidateIoRequest (Address, 8) == AE_OK)
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{
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Status = AcpiOsReadPort (Address, &OneByte, 8);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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*Value |= (OneByte << i);
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}
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Address++;
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}
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: AcpiHwWritePort
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*
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* PARAMETERS: Address Address of I/O port/register to write
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* Value Value to write
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* Width Number of bits
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write data to an I/O port or register. This is a front-end
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* to AcpiOsWritePort that performs validation on both the port
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* address and the length.
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*
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*****************************************************************************/
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ACPI_STATUS
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AcpiHwWritePort (
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ACPI_IO_ADDRESS Address,
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UINT32 Value,
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UINT32 Width)
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{
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ACPI_STATUS Status;
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UINT32 i;
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/* Truncate address to 16 bits if requested */
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if (AcpiGbl_TruncateIoAddresses)
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{
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Address &= ACPI_UINT16_MAX;
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}
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/* Validate the entire request and perform the I/O */
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Status = AcpiHwValidateIoRequest (Address, Width);
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if (ACPI_SUCCESS (Status))
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{
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Status = AcpiOsWritePort (Address, Value, Width);
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return (Status);
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}
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if (Status != AE_AML_ILLEGAL_ADDRESS)
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{
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return (Status);
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}
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/*
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* There has been a protection violation within the request. Fall
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* back to byte granularity port I/O and ignore the failing bytes.
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* This provides Windows compatibility.
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*/
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for (i = 0; i < Width; i += 8)
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{
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/* Validate and write one byte */
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if (AcpiHwValidateIoRequest (Address, 8) == AE_OK)
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{
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Status = AcpiOsWritePort (Address, (Value >> i) & 0xFF, 8);
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if (ACPI_FAILURE (Status))
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{
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return (Status);
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}
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}
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Address++;
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}
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return (AE_OK);
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}
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