329 строки
10 KiB
C
329 строки
10 KiB
C
/******************************************************************************
|
|
*
|
|
* 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/acpi.h>
|
|
#include "accommon.h"
|
|
|
|
#define _COMPONENT ACPI_HARDWARE
|
|
ACPI_MODULE_NAME("hwvalid")
|
|
|
|
/* Local prototypes */
|
|
static acpi_status
|
|
acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width);
|
|
|
|
/*
|
|
* 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 win_XP 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 struct acpi_port_info acpi_protected_ports[] = {
|
|
{"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 (acpi_protected_ports)
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_validate_io_request
|
|
*
|
|
* PARAMETERS: Address Address of I/O port/register
|
|
* bit_width 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
|
|
acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
|
|
{
|
|
u32 i;
|
|
u32 byte_width;
|
|
acpi_io_address last_address;
|
|
const struct acpi_port_info *port_info;
|
|
|
|
ACPI_FUNCTION_TRACE(hw_validate_io_request);
|
|
|
|
/* Supported widths are 8/16/32 */
|
|
|
|
if ((bit_width != 8) && (bit_width != 16) && (bit_width != 32)) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Bad BitWidth parameter: %8.8X", bit_width));
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
port_info = acpi_protected_ports;
|
|
byte_width = ACPI_DIV_8(bit_width);
|
|
last_address = address + byte_width - 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(last_address), byte_width));
|
|
|
|
/* Maximum 16-bit address in I/O space */
|
|
|
|
if (last_address > 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), byte_width));
|
|
return_ACPI_STATUS(AE_LIMIT);
|
|
}
|
|
|
|
/* Exit if requested address is not within the protected port table */
|
|
|
|
if (address > acpi_protected_ports[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++, port_info++) {
|
|
/*
|
|
* 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 <= port_info->end)
|
|
&& (last_address >= port_info->start)) {
|
|
|
|
/* Port illegality may depend on the _OSI calls made by the BIOS */
|
|
|
|
if (acpi_gbl_osi_data >= port_info->osi_dependency) {
|
|
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),
|
|
byte_width, port_info->name,
|
|
port_info->start,
|
|
port_info->end));
|
|
|
|
return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS);
|
|
}
|
|
}
|
|
|
|
/* Finished if address range ends before the end of this port */
|
|
|
|
if (last_address <= port_info->end) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_read_port
|
|
*
|
|
* 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 acpi_os_read_port that performs validation on both the port
|
|
* address and the length.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width)
|
|
{
|
|
acpi_status status;
|
|
u32 one_byte;
|
|
u32 i;
|
|
|
|
/* Truncate address to 16 bits if requested */
|
|
|
|
if (acpi_gbl_truncate_io_addresses) {
|
|
address &= ACPI_UINT16_MAX;
|
|
}
|
|
|
|
/* Validate the entire request and perform the I/O */
|
|
|
|
status = acpi_hw_validate_io_request(address, width);
|
|
if (ACPI_SUCCESS(status)) {
|
|
status = acpi_os_read_port(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 (acpi_hw_validate_io_request(address, 8) == AE_OK) {
|
|
status = acpi_os_read_port(address, &one_byte, 8);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
*value |= (one_byte << i);
|
|
}
|
|
|
|
address++;
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_write_port
|
|
*
|
|
* 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 acpi_os_write_port that performs validation on both the port
|
|
* address and the length.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width)
|
|
{
|
|
acpi_status status;
|
|
u32 i;
|
|
|
|
/* Truncate address to 16 bits if requested */
|
|
|
|
if (acpi_gbl_truncate_io_addresses) {
|
|
address &= ACPI_UINT16_MAX;
|
|
}
|
|
|
|
/* Validate the entire request and perform the I/O */
|
|
|
|
status = acpi_hw_validate_io_request(address, width);
|
|
if (ACPI_SUCCESS(status)) {
|
|
status = acpi_os_write_port(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 (acpi_hw_validate_io_request(address, 8) == AE_OK) {
|
|
status =
|
|
acpi_os_write_port(address, (value >> i) & 0xFF, 8);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
address++;
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|