529 lines
16 KiB
C
529 lines
16 KiB
C
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/******************************************************************************
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*
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* Module Name: exregion - ACPI default op_region (address space) handlers
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exregion")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_system_memory_space_handler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* bit_width - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* handler_context - Pointer to Handler's context
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* region_context - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the System Memory address space (Op Region)
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*
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******************************************************************************/
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acpi_status
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acpi_ex_system_memory_space_handler (
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u32 function,
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acpi_physical_address address,
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u32 bit_width,
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acpi_integer *value,
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void *handler_context,
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void *region_context)
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{
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acpi_status status = AE_OK;
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void *logical_addr_ptr = NULL;
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struct acpi_mem_space_context *mem_info = region_context;
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u32 length;
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acpi_size window_size;
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#ifndef ACPI_MISALIGNED_TRANSFERS
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u32 remainder;
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#endif
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ACPI_FUNCTION_TRACE ("ex_system_memory_space_handler");
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/* Validate and translate the bit width */
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switch (bit_width) {
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case 8:
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length = 1;
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break;
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case 16:
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length = 2;
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break;
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case 32:
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length = 4;
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break;
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case 64:
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length = 8;
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break;
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid system_memory width %d\n",
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bit_width));
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return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
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}
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#ifndef ACPI_MISALIGNED_TRANSFERS
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/*
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* Hardware does not support non-aligned data transfers, we must verify
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* the request.
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*/
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(void) acpi_ut_short_divide ((acpi_integer) address, length, NULL, &remainder);
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if (remainder != 0) {
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return_ACPI_STATUS (AE_AML_ALIGNMENT);
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}
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#endif
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/*
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* Does the request fit into the cached memory mapping?
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* Is 1) Address below the current mapping? OR
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* 2) Address beyond the current mapping?
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*/
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if ((address < mem_info->mapped_physical_address) ||
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(((acpi_integer) address + length) >
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((acpi_integer) mem_info->mapped_physical_address + mem_info->mapped_length))) {
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/*
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* The request cannot be resolved by the current memory mapping;
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* Delete the existing mapping and create a new one.
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*/
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if (mem_info->mapped_length) {
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/* Valid mapping, delete it */
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acpi_os_unmap_memory (mem_info->mapped_logical_address,
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mem_info->mapped_length);
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}
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/*
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* Don't attempt to map memory beyond the end of the region, and
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* constrain the maximum mapping size to something reasonable.
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*/
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window_size = (acpi_size) ((mem_info->address + mem_info->length) - address);
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if (window_size > ACPI_SYSMEM_REGION_WINDOW_SIZE) {
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window_size = ACPI_SYSMEM_REGION_WINDOW_SIZE;
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}
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/* Create a new mapping starting at the address given */
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status = acpi_os_map_memory (address, window_size,
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(void **) &mem_info->mapped_logical_address);
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if (ACPI_FAILURE (status)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not map memory at %8.8X%8.8X, size %X\n",
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ACPI_FORMAT_UINT64 (address), (u32) window_size));
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mem_info->mapped_length = 0;
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return_ACPI_STATUS (status);
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}
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/* Save the physical address and mapping size */
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mem_info->mapped_physical_address = address;
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mem_info->mapped_length = window_size;
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}
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/*
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* Generate a logical pointer corresponding to the address we want to
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* access
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*/
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logical_addr_ptr = mem_info->mapped_logical_address +
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((acpi_integer) address - (acpi_integer) mem_info->mapped_physical_address);
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"system_memory %d (%d width) Address=%8.8X%8.8X\n", function, bit_width,
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ACPI_FORMAT_UINT64 (address)));
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/*
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* Perform the memory read or write
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*
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* Note: For machines that do not support non-aligned transfers, the target
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* address was checked for alignment above. We do not attempt to break the
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* transfer up into smaller (byte-size) chunks because the AML specifically
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* asked for a transfer width that the hardware may require.
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*/
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switch (function) {
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case ACPI_READ:
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*value = 0;
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switch (bit_width) {
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case 8:
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*value = (acpi_integer) *((u8 *) logical_addr_ptr);
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break;
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case 16:
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*value = (acpi_integer) *((u16 *) logical_addr_ptr);
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break;
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case 32:
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*value = (acpi_integer) *((u32 *) logical_addr_ptr);
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break;
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#if ACPI_MACHINE_WIDTH != 16
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case 64:
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*value = (acpi_integer) *((u64 *) logical_addr_ptr);
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break;
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#endif
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default:
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/* bit_width was already validated */
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break;
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}
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break;
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case ACPI_WRITE:
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switch (bit_width) {
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case 8:
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*(u8 *) logical_addr_ptr = (u8) *value;
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break;
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case 16:
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*(u16 *) logical_addr_ptr = (u16) *value;
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break;
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case 32:
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*(u32 *) logical_addr_ptr = (u32) *value;
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break;
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#if ACPI_MACHINE_WIDTH != 16
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case 64:
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*(u64 *) logical_addr_ptr = (u64) *value;
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break;
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#endif
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default:
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/* bit_width was already validated */
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break;
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}
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break;
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default:
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status = AE_BAD_PARAMETER;
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break;
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}
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_system_io_space_handler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* bit_width - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* handler_context - Pointer to Handler's context
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* region_context - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the System IO address space (Op Region)
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*
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******************************************************************************/
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acpi_status
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acpi_ex_system_io_space_handler (
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u32 function,
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acpi_physical_address address,
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u32 bit_width,
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acpi_integer *value,
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void *handler_context,
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void *region_context)
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{
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acpi_status status = AE_OK;
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u32 value32;
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ACPI_FUNCTION_TRACE ("ex_system_io_space_handler");
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"system_iO %d (%d width) Address=%8.8X%8.8X\n", function, bit_width,
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ACPI_FORMAT_UINT64 (address)));
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/* Decode the function parameter */
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switch (function) {
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case ACPI_READ:
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status = acpi_os_read_port ((acpi_io_address) address, &value32, bit_width);
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*value = value32;
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break;
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case ACPI_WRITE:
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status = acpi_os_write_port ((acpi_io_address) address, (u32) *value, bit_width);
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break;
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default:
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status = AE_BAD_PARAMETER;
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break;
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}
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_pci_config_space_handler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* bit_width - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* handler_context - Pointer to Handler's context
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* region_context - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the PCI Config address space (Op Region)
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*
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******************************************************************************/
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acpi_status
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acpi_ex_pci_config_space_handler (
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u32 function,
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acpi_physical_address address,
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u32 bit_width,
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acpi_integer *value,
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void *handler_context,
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void *region_context)
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{
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acpi_status status = AE_OK;
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struct acpi_pci_id *pci_id;
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u16 pci_register;
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ACPI_FUNCTION_TRACE ("ex_pci_config_space_handler");
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/*
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* The arguments to acpi_os(Read|Write)pci_configuration are:
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*
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* pci_segment is the PCI bus segment range 0-31
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* pci_bus is the PCI bus number range 0-255
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* pci_device is the PCI device number range 0-31
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* pci_function is the PCI device function number
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* pci_register is the Config space register range 0-255 bytes
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*
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* Value - input value for write, output address for read
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*
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*/
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pci_id = (struct acpi_pci_id *) region_context;
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pci_register = (u16) (u32) address;
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"pci_config %d (%d) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
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function, bit_width, pci_id->segment, pci_id->bus, pci_id->device,
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pci_id->function, pci_register));
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switch (function) {
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case ACPI_READ:
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*value = 0;
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status = acpi_os_read_pci_configuration (pci_id, pci_register, value, bit_width);
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break;
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case ACPI_WRITE:
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status = acpi_os_write_pci_configuration (pci_id, pci_register, *value, bit_width);
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break;
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default:
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status = AE_BAD_PARAMETER;
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break;
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}
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_cmos_space_handler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* bit_width - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* handler_context - Pointer to Handler's context
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* region_context - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the CMOS address space (Op Region)
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*
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******************************************************************************/
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acpi_status
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acpi_ex_cmos_space_handler (
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u32 function,
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acpi_physical_address address,
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u32 bit_width,
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acpi_integer *value,
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void *handler_context,
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void *region_context)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE ("ex_cmos_space_handler");
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_pci_bar_space_handler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* bit_width - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* handler_context - Pointer to Handler's context
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* region_context - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
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*
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******************************************************************************/
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acpi_status
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acpi_ex_pci_bar_space_handler (
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u32 function,
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acpi_physical_address address,
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u32 bit_width,
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acpi_integer *value,
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void *handler_context,
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void *region_context)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE ("ex_pci_bar_space_handler");
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_data_table_space_handler
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*
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* PARAMETERS: Function - Read or Write operation
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* Address - Where in the space to read or write
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* bit_width - Field width in bits (8, 16, or 32)
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* Value - Pointer to in or out value
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* handler_context - Pointer to Handler's context
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* region_context - Pointer to context specific to the
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* accessed region
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*
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* RETURN: Status
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*
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* DESCRIPTION: Handler for the Data Table address space (Op Region)
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*
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******************************************************************************/
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acpi_status
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acpi_ex_data_table_space_handler (
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u32 function,
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acpi_physical_address address,
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u32 bit_width,
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acpi_integer *value,
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void *handler_context,
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void *region_context)
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{
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acpi_status status = AE_OK;
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u32 byte_width = ACPI_DIV_8 (bit_width);
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u32 i;
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char *logical_addr_ptr;
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ACPI_FUNCTION_TRACE ("ex_data_table_space_handler");
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logical_addr_ptr = ACPI_PHYSADDR_TO_PTR (address);
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/* Perform the memory read or write */
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switch (function) {
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case ACPI_READ:
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for (i = 0; i < byte_width; i++) {
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((char *) value) [i] = logical_addr_ptr[i];
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}
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break;
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case ACPI_WRITE:
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default:
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return_ACPI_STATUS (AE_SUPPORT);
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}
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return_ACPI_STATUS (status);
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}
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