diff options
Diffstat (limited to 'usr/src/common/acpica/hardware/hwvalid.c')
| -rw-r--r-- | usr/src/common/acpica/hardware/hwvalid.c | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/usr/src/common/acpica/hardware/hwvalid.c b/usr/src/common/acpica/hardware/hwvalid.c new file mode 100644 index 0000000000..64507d0418 --- /dev/null +++ b/usr/src/common/acpica/hardware/hwvalid.c @@ -0,0 +1,363 @@ +/****************************************************************************** + * + * Module Name: hwvalid - I/O request validation + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2016, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include "acpi.h" +#include "accommon.h" + +#define _COMPONENT ACPI_HARDWARE + ACPI_MODULE_NAME ("hwvalid") + +/* Local prototypes */ + +static ACPI_STATUS +AcpiHwValidateIoRequest ( + ACPI_IO_ADDRESS Address, + UINT32 BitWidth); + + +/* + * Protected I/O ports. Some ports are always illegal, and some are + * conditionally illegal. This table must remain ordered by port address. + * + * The table is used to implement the Microsoft port access rules that + * first appeared in Windows XP. Some ports are always illegal, and some + * ports are only illegal if the BIOS calls _OSI with a WinXP string or + * later (meaning that the BIOS itelf is post-XP.) + * + * This provides ACPICA with the desired port protections and + * Microsoft compatibility. + * + * Description of port entries: + * DMA: DMA controller + * PIC0: Programmable Interrupt Controller (8259A) + * PIT1: System Timer 1 + * PIT2: System Timer 2 failsafe + * RTC: Real-time clock + * CMOS: Extended CMOS + * DMA1: DMA 1 page registers + * DMA1L: DMA 1 Ch 0 low page + * DMA2: DMA 2 page registers + * DMA2L: DMA 2 low page refresh + * ARBC: Arbitration control + * SETUP: Reserved system board setup + * POS: POS channel select + * PIC1: Cascaded PIC + * IDMA: ISA DMA + * ELCR: PIC edge/level registers + * PCI: PCI configuration space + */ +static const ACPI_PORT_INFO AcpiProtectedPorts[] = +{ + {"DMA", 0x0000, 0x000F, ACPI_OSI_WIN_XP}, + {"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL}, + {"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP}, + {"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP}, + {"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP}, + {"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP}, + {"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP}, + {"DMA1L", 0x0087, 0x0087, ACPI_OSI_WIN_XP}, + {"DMA2", 0x0089, 0x008B, ACPI_OSI_WIN_XP}, + {"DMA2L", 0x008F, 0x008F, ACPI_OSI_WIN_XP}, + {"ARBC", 0x0090, 0x0091, ACPI_OSI_WIN_XP}, + {"SETUP", 0x0093, 0x0094, ACPI_OSI_WIN_XP}, + {"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP}, + {"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL}, + {"IDMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP}, + {"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL}, + {"PCI", 0x0CF8, 0x0CFF, ACPI_OSI_WIN_XP} +}; + +#define ACPI_PORT_INFO_ENTRIES ACPI_ARRAY_LENGTH (AcpiProtectedPorts) + + +/****************************************************************************** + * + * FUNCTION: AcpiHwValidateIoRequest + * + * PARAMETERS: Address Address of I/O port/register + * BitWidth Number of bits (8,16,32) + * + * RETURN: Status + * + * DESCRIPTION: Validates an I/O request (address/length). Certain ports are + * always illegal and some ports are only illegal depending on + * the requests the BIOS AML code makes to the predefined + * _OSI method. + * + ******************************************************************************/ + +static ACPI_STATUS +AcpiHwValidateIoRequest ( + ACPI_IO_ADDRESS Address, + UINT32 BitWidth) +{ + UINT32 i; + UINT32 ByteWidth; + ACPI_IO_ADDRESS LastAddress; + const ACPI_PORT_INFO *PortInfo; + + + ACPI_FUNCTION_TRACE (HwValidateIoRequest); + + + /* Supported widths are 8/16/32 */ + + if ((BitWidth != 8) && + (BitWidth != 16) && + (BitWidth != 32)) + { + ACPI_ERROR ((AE_INFO, + "Bad BitWidth parameter: %8.8X", BitWidth)); + return (AE_BAD_PARAMETER); + } + + PortInfo = AcpiProtectedPorts; + ByteWidth = ACPI_DIV_8 (BitWidth); + LastAddress = Address + ByteWidth - 1; + + ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Address %8.8X%8.8X LastAddress %8.8X%8.8X Length %X", + ACPI_FORMAT_UINT64 (Address), ACPI_FORMAT_UINT64 (LastAddress), + ByteWidth)); + + /* Maximum 16-bit address in I/O space */ + + if (LastAddress > ACPI_UINT16_MAX) + { + ACPI_ERROR ((AE_INFO, + "Illegal I/O port address/length above 64K: %8.8X%8.8X/0x%X", + ACPI_FORMAT_UINT64 (Address), ByteWidth)); + return_ACPI_STATUS (AE_LIMIT); + } + + /* Exit if requested address is not within the protected port table */ + + if (Address > AcpiProtectedPorts[ACPI_PORT_INFO_ENTRIES - 1].End) + { + return_ACPI_STATUS (AE_OK); + } + + /* Check request against the list of protected I/O ports */ + + for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, PortInfo++) + { + /* + * Check if the requested address range will write to a reserved + * port. Four cases to consider: + * + * 1) Address range is contained completely in the port address range + * 2) Address range overlaps port range at the port range start + * 3) Address range overlaps port range at the port range end + * 4) Address range completely encompasses the port range + */ + if ((Address <= PortInfo->End) && (LastAddress >= PortInfo->Start)) + { + /* Port illegality may depend on the _OSI calls made by the BIOS */ + + if (AcpiGbl_OsiData >= PortInfo->OsiDependency) + { + ACPI_DEBUG_PRINT ((ACPI_DB_IO, + "Denied AML access to port 0x%8.8X%8.8X/%X (%s 0x%.4X-0x%.4X)", + ACPI_FORMAT_UINT64 (Address), ByteWidth, PortInfo->Name, + PortInfo->Start, PortInfo->End)); + + return_ACPI_STATUS (AE_AML_ILLEGAL_ADDRESS); + } + } + + /* Finished if address range ends before the end of this port */ + + if (LastAddress <= PortInfo->End) + { + break; + } + } + + return_ACPI_STATUS (AE_OK); +} + + +/****************************************************************************** + * + * FUNCTION: AcpiHwReadPort + * + * PARAMETERS: Address Address of I/O port/register to read + * Value Where value is placed + * Width Number of bits + * + * RETURN: Status and value read from port + * + * DESCRIPTION: Read data from an I/O port or register. This is a front-end + * to AcpiOsReadPort that performs validation on both the port + * address and the length. + * + *****************************************************************************/ + +ACPI_STATUS +AcpiHwReadPort ( + ACPI_IO_ADDRESS Address, + UINT32 *Value, + UINT32 Width) +{ + ACPI_STATUS Status; + UINT32 OneByte; + UINT32 i; + + + /* Truncate address to 16 bits if requested */ + + if (AcpiGbl_TruncateIoAddresses) + { + Address &= ACPI_UINT16_MAX; + } + + /* Validate the entire request and perform the I/O */ + + Status = AcpiHwValidateIoRequest (Address, Width); + if (ACPI_SUCCESS (Status)) + { + Status = AcpiOsReadPort (Address, Value, Width); + return (Status); + } + + if (Status != AE_AML_ILLEGAL_ADDRESS) + { + return (Status); + } + + /* + * There has been a protection violation within the request. Fall + * back to byte granularity port I/O and ignore the failing bytes. + * This provides Windows compatibility. + */ + for (i = 0, *Value = 0; i < Width; i += 8) + { + /* Validate and read one byte */ + + if (AcpiHwValidateIoRequest (Address, 8) == AE_OK) + { + Status = AcpiOsReadPort (Address, &OneByte, 8); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + *Value |= (OneByte << i); + } + + Address++; + } + + return (AE_OK); +} + + +/****************************************************************************** + * + * FUNCTION: AcpiHwWritePort + * + * PARAMETERS: Address Address of I/O port/register to write + * Value Value to write + * Width Number of bits + * + * RETURN: Status + * + * DESCRIPTION: Write data to an I/O port or register. This is a front-end + * to AcpiOsWritePort that performs validation on both the port + * address and the length. + * + *****************************************************************************/ + +ACPI_STATUS +AcpiHwWritePort ( + ACPI_IO_ADDRESS Address, + UINT32 Value, + UINT32 Width) +{ + ACPI_STATUS Status; + UINT32 i; + + + /* Truncate address to 16 bits if requested */ + + if (AcpiGbl_TruncateIoAddresses) + { + Address &= ACPI_UINT16_MAX; + } + + /* Validate the entire request and perform the I/O */ + + Status = AcpiHwValidateIoRequest (Address, Width); + if (ACPI_SUCCESS (Status)) + { + Status = AcpiOsWritePort (Address, Value, Width); + return (Status); + } + + if (Status != AE_AML_ILLEGAL_ADDRESS) + { + return (Status); + } + + /* + * There has been a protection violation within the request. Fall + * back to byte granularity port I/O and ignore the failing bytes. + * This provides Windows compatibility. + */ + for (i = 0; i < Width; i += 8) + { + /* Validate and write one byte */ + + if (AcpiHwValidateIoRequest (Address, 8) == AE_OK) + { + Status = AcpiOsWritePort (Address, (Value >> i) & 0xFF, 8); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + } + + Address++; + } + + return (AE_OK); +} |