545 lines
14 KiB
C
545 lines
14 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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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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* Copyright (C) 2000 - 2023, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "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(u32 function,
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acpi_physical_address address,
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u32 bit_width,
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u64 *value,
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void *handler_context, 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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struct acpi_mem_mapping *mm = mem_info->cur_mm;
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u32 length;
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acpi_size map_length;
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acpi_size page_boundary_map_length;
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#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
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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_ERROR((AE_INFO, "Invalid SystemMemory width %u",
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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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#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
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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((u64) 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 (!mm || (address < mm->physical_address) ||
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((u64) address + length > (u64) mm->physical_address + mm->length)) {
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/*
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* The request cannot be resolved by the current memory mapping.
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*
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* Look for an existing saved mapping covering the address range
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* at hand. If found, save it as the current one and carry out
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* the access.
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*/
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for (mm = mem_info->first_mm; mm; mm = mm->next_mm) {
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if (mm == mem_info->cur_mm)
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continue;
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if (address < mm->physical_address)
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continue;
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if ((u64) address + length >
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(u64) mm->physical_address + mm->length)
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continue;
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mem_info->cur_mm = mm;
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goto access;
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}
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/* Create a new mappings list entry */
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mm = ACPI_ALLOCATE_ZEROED(sizeof(*mm));
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if (!mm) {
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ACPI_ERROR((AE_INFO,
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"Unable to save memory mapping at 0x%8.8X%8.8X, size %u",
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ACPI_FORMAT_UINT64(address), length));
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/*
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* October 2009: Attempt to map from the requested address to the
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* end of the region. However, we will never map more than one
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* page, nor will we cross a page boundary.
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*/
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map_length = (acpi_size)
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((mem_info->address + mem_info->length) - address);
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/*
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* If mapping the entire remaining portion of the region will cross
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* a page boundary, just map up to the page boundary, do not cross.
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* On some systems, crossing a page boundary while mapping regions
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* can cause warnings if the pages have different attributes
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* due to resource management.
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*
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* This has the added benefit of constraining a single mapping to
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* one page, which is similar to the original code that used a 4k
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* maximum window.
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*/
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page_boundary_map_length = (acpi_size)
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(ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address);
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if (page_boundary_map_length == 0) {
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page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
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}
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if (map_length > page_boundary_map_length) {
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map_length = page_boundary_map_length;
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}
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/* Create a new mapping starting at the address given */
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logical_addr_ptr = acpi_os_map_memory(address, map_length);
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if (!logical_addr_ptr) {
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ACPI_ERROR((AE_INFO,
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"Could not map memory at 0x%8.8X%8.8X, size %u",
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ACPI_FORMAT_UINT64(address),
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(u32)map_length));
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ACPI_FREE(mm);
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Save the physical address and mapping size */
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mm->logical_address = logical_addr_ptr;
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mm->physical_address = address;
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mm->length = map_length;
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/*
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* Add the new entry to the mappigs list and save it as the
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* current mapping.
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*/
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mm->next_mm = mem_info->first_mm;
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mem_info->first_mm = mm;
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mem_info->cur_mm = mm;
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}
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access:
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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 = mm->logical_address +
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((u64) address - (u64) mm->physical_address);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
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bit_width, function, 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 = (u64)ACPI_GET8(logical_addr_ptr);
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break;
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case 16:
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*value = (u64)ACPI_GET16(logical_addr_ptr);
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break;
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case 32:
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*value = (u64)ACPI_GET32(logical_addr_ptr);
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break;
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case 64:
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*value = (u64)ACPI_GET64(logical_addr_ptr);
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break;
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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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ACPI_SET8(logical_addr_ptr, *value);
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break;
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case 16:
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ACPI_SET16(logical_addr_ptr, *value);
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break;
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case 32:
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ACPI_SET32(logical_addr_ptr, *value);
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break;
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case 64:
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ACPI_SET64(logical_addr_ptr, *value);
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break;
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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(u32 function,
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acpi_physical_address address,
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u32 bit_width,
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u64 *value,
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void *handler_context, 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 (width %u) R/W %u Address=%8.8X%8.8X\n",
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bit_width, function, 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_hw_read_port((acpi_io_address)address,
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&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_hw_write_port((acpi_io_address)address,
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(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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#ifdef ACPI_PCI_CONFIGURED
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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(u32 function,
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acpi_physical_address address,
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u32 bit_width,
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u64 *value,
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void *handler_context, 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 %u (%u) Seg(%04x) Bus(%04x) "
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"Dev(%04x) Func(%04x) Reg(%04x)\n",
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function, bit_width, pci_id->segment, pci_id->bus,
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pci_id->device, 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 =
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acpi_os_read_pci_configuration(pci_id, pci_register, value,
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bit_width);
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break;
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case ACPI_WRITE:
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status =
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acpi_os_write_pci_configuration(pci_id, pci_register,
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*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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#endif
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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(u32 function,
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acpi_physical_address address,
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u32 bit_width,
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u64 *value,
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void *handler_context, 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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#ifdef ACPI_PCI_CONFIGURED
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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(u32 function,
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acpi_physical_address address,
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u32 bit_width,
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u64 *value,
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void *handler_context, 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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#endif
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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(u32 function,
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acpi_physical_address address,
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u32 bit_width,
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u64 *value,
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void *handler_context, void *region_context)
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{
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struct acpi_data_table_mapping *mapping;
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char *pointer;
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ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
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mapping = (struct acpi_data_table_mapping *) region_context;
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pointer = ACPI_CAST_PTR(char, mapping->pointer) +
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(address - ACPI_PTR_TO_PHYSADDR(mapping->pointer));
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/*
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* Perform the memory read or write. The bit_width was already
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* validated.
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*/
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switch (function) {
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case ACPI_READ:
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memcpy(ACPI_CAST_PTR(char, value), pointer,
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ACPI_DIV_8(bit_width));
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break;
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case ACPI_WRITE:
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memcpy(pointer, ACPI_CAST_PTR(char, value),
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ACPI_DIV_8(bit_width));
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break;
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default:
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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return_ACPI_STATUS(AE_OK);
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}
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