| // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
| /****************************************************************************** |
| * |
| * Module Name: exregion - ACPI default op_region (address space) handlers |
| * |
| * Copyright (C) 2000 - 2018, Intel Corp. |
| * |
| *****************************************************************************/ |
| |
| #include <acpi/acpi.h> |
| #include "accommon.h" |
| #include "acinterp.h" |
| |
| #define _COMPONENT ACPI_EXECUTER |
| ACPI_MODULE_NAME("exregion") |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_ex_system_memory_space_handler |
| * |
| * PARAMETERS: function - Read or Write operation |
| * address - Where in the space to read or write |
| * bit_width - Field width in bits (8, 16, or 32) |
| * value - Pointer to in or out value |
| * handler_context - Pointer to Handler's context |
| * region_context - Pointer to context specific to the |
| * accessed region |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Handler for the System Memory address space (Op Region) |
| * |
| ******************************************************************************/ |
| acpi_status |
| acpi_ex_system_memory_space_handler(u32 function, |
| acpi_physical_address address, |
| u32 bit_width, |
| u64 *value, |
| void *handler_context, void *region_context) |
| { |
| acpi_status status = AE_OK; |
| void *logical_addr_ptr = NULL; |
| struct acpi_mem_space_context *mem_info = region_context; |
| u32 length; |
| acpi_size map_length; |
| acpi_size page_boundary_map_length; |
| #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED |
| u32 remainder; |
| #endif |
| |
| ACPI_FUNCTION_TRACE(ex_system_memory_space_handler); |
| |
| /* Validate and translate the bit width */ |
| |
| switch (bit_width) { |
| case 8: |
| |
| length = 1; |
| break; |
| |
| case 16: |
| |
| length = 2; |
| break; |
| |
| case 32: |
| |
| length = 4; |
| break; |
| |
| case 64: |
| |
| length = 8; |
| break; |
| |
| default: |
| |
| ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u", |
| bit_width)); |
| return_ACPI_STATUS(AE_AML_OPERAND_VALUE); |
| } |
| |
| #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED |
| /* |
| * Hardware does not support non-aligned data transfers, we must verify |
| * the request. |
| */ |
| (void)acpi_ut_short_divide((u64) address, length, NULL, &remainder); |
| if (remainder != 0) { |
| return_ACPI_STATUS(AE_AML_ALIGNMENT); |
| } |
| #endif |
| |
| /* |
| * Does the request fit into the cached memory mapping? |
| * Is 1) Address below the current mapping? OR |
| * 2) Address beyond the current mapping? |
| */ |
| if ((address < mem_info->mapped_physical_address) || |
| (((u64) address + length) > ((u64) |
| mem_info->mapped_physical_address + |
| mem_info->mapped_length))) { |
| /* |
| * The request cannot be resolved by the current memory mapping; |
| * Delete the existing mapping and create a new one. |
| */ |
| if (mem_info->mapped_length) { |
| |
| /* Valid mapping, delete it */ |
| |
| acpi_os_unmap_memory(mem_info->mapped_logical_address, |
| mem_info->mapped_length); |
| } |
| |
| /* |
| * October 2009: Attempt to map from the requested address to the |
| * end of the region. However, we will never map more than one |
| * page, nor will we cross a page boundary. |
| */ |
| map_length = (acpi_size) |
| ((mem_info->address + mem_info->length) - address); |
| |
| /* |
| * If mapping the entire remaining portion of the region will cross |
| * a page boundary, just map up to the page boundary, do not cross. |
| * On some systems, crossing a page boundary while mapping regions |
| * can cause warnings if the pages have different attributes |
| * due to resource management. |
| * |
| * This has the added benefit of constraining a single mapping to |
| * one page, which is similar to the original code that used a 4k |
| * maximum window. |
| */ |
| page_boundary_map_length = (acpi_size) |
| (ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address); |
| if (page_boundary_map_length == 0) { |
| page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE; |
| } |
| |
| if (map_length > page_boundary_map_length) { |
| map_length = page_boundary_map_length; |
| } |
| |
| /* Create a new mapping starting at the address given */ |
| |
| mem_info->mapped_logical_address = |
| acpi_os_map_memory(address, map_length); |
| if (!mem_info->mapped_logical_address) { |
| ACPI_ERROR((AE_INFO, |
| "Could not map memory at 0x%8.8X%8.8X, size %u", |
| ACPI_FORMAT_UINT64(address), |
| (u32)map_length)); |
| mem_info->mapped_length = 0; |
| return_ACPI_STATUS(AE_NO_MEMORY); |
| } |
| |
| /* Save the physical address and mapping size */ |
| |
| mem_info->mapped_physical_address = address; |
| mem_info->mapped_length = map_length; |
| } |
| |
| /* |
| * Generate a logical pointer corresponding to the address we want to |
| * access |
| */ |
| logical_addr_ptr = mem_info->mapped_logical_address + |
| ((u64) address - (u64) mem_info->mapped_physical_address); |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n", |
| bit_width, function, ACPI_FORMAT_UINT64(address))); |
| |
| /* |
| * Perform the memory read or write |
| * |
| * Note: For machines that do not support non-aligned transfers, the target |
| * address was checked for alignment above. We do not attempt to break the |
| * transfer up into smaller (byte-size) chunks because the AML specifically |
| * asked for a transfer width that the hardware may require. |
| */ |
| switch (function) { |
| case ACPI_READ: |
| |
| *value = 0; |
| switch (bit_width) { |
| case 8: |
| |
| *value = (u64)ACPI_GET8(logical_addr_ptr); |
| break; |
| |
| case 16: |
| |
| *value = (u64)ACPI_GET16(logical_addr_ptr); |
| break; |
| |
| case 32: |
| |
| *value = (u64)ACPI_GET32(logical_addr_ptr); |
| break; |
| |
| case 64: |
| |
| *value = (u64)ACPI_GET64(logical_addr_ptr); |
| break; |
| |
| default: |
| |
| /* bit_width was already validated */ |
| |
| break; |
| } |
| break; |
| |
| case ACPI_WRITE: |
| |
| switch (bit_width) { |
| case 8: |
| |
| ACPI_SET8(logical_addr_ptr, *value); |
| break; |
| |
| case 16: |
| |
| ACPI_SET16(logical_addr_ptr, *value); |
| break; |
| |
| case 32: |
| |
| ACPI_SET32(logical_addr_ptr, *value); |
| break; |
| |
| case 64: |
| |
| ACPI_SET64(logical_addr_ptr, *value); |
| break; |
| |
| default: |
| |
| /* bit_width was already validated */ |
| |
| break; |
| } |
| break; |
| |
| default: |
| |
| status = AE_BAD_PARAMETER; |
| break; |
| } |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_ex_system_io_space_handler |
| * |
| * PARAMETERS: function - Read or Write operation |
| * address - Where in the space to read or write |
| * bit_width - Field width in bits (8, 16, or 32) |
| * value - Pointer to in or out value |
| * handler_context - Pointer to Handler's context |
| * region_context - Pointer to context specific to the |
| * accessed region |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Handler for the System IO address space (Op Region) |
| * |
| ******************************************************************************/ |
| |
| acpi_status |
| acpi_ex_system_io_space_handler(u32 function, |
| acpi_physical_address address, |
| u32 bit_width, |
| u64 *value, |
| void *handler_context, void *region_context) |
| { |
| acpi_status status = AE_OK; |
| u32 value32; |
| |
| ACPI_FUNCTION_TRACE(ex_system_io_space_handler); |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n", |
| bit_width, function, ACPI_FORMAT_UINT64(address))); |
| |
| /* Decode the function parameter */ |
| |
| switch (function) { |
| case ACPI_READ: |
| |
| status = acpi_hw_read_port((acpi_io_address)address, |
| &value32, bit_width); |
| *value = value32; |
| break; |
| |
| case ACPI_WRITE: |
| |
| status = acpi_hw_write_port((acpi_io_address)address, |
| (u32)*value, bit_width); |
| break; |
| |
| default: |
| |
| status = AE_BAD_PARAMETER; |
| break; |
| } |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| #ifdef ACPI_PCI_CONFIGURED |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_ex_pci_config_space_handler |
| * |
| * PARAMETERS: function - Read or Write operation |
| * address - Where in the space to read or write |
| * bit_width - Field width in bits (8, 16, or 32) |
| * value - Pointer to in or out value |
| * handler_context - Pointer to Handler's context |
| * region_context - Pointer to context specific to the |
| * accessed region |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Handler for the PCI Config address space (Op Region) |
| * |
| ******************************************************************************/ |
| |
| acpi_status |
| acpi_ex_pci_config_space_handler(u32 function, |
| acpi_physical_address address, |
| u32 bit_width, |
| u64 *value, |
| void *handler_context, void *region_context) |
| { |
| acpi_status status = AE_OK; |
| struct acpi_pci_id *pci_id; |
| u16 pci_register; |
| |
| ACPI_FUNCTION_TRACE(ex_pci_config_space_handler); |
| |
| /* |
| * The arguments to acpi_os(Read|Write)pci_configuration are: |
| * |
| * pci_segment is the PCI bus segment range 0-31 |
| * pci_bus is the PCI bus number range 0-255 |
| * pci_device is the PCI device number range 0-31 |
| * pci_function is the PCI device function number |
| * pci_register is the Config space register range 0-255 bytes |
| * |
| * value - input value for write, output address for read |
| * |
| */ |
| pci_id = (struct acpi_pci_id *)region_context; |
| pci_register = (u16) (u32) address; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Pci-Config %u (%u) Seg(%04x) Bus(%04x) " |
| "Dev(%04x) Func(%04x) Reg(%04x)\n", |
| function, bit_width, pci_id->segment, pci_id->bus, |
| pci_id->device, pci_id->function, pci_register)); |
| |
| switch (function) { |
| case ACPI_READ: |
| |
| *value = 0; |
| status = |
| acpi_os_read_pci_configuration(pci_id, pci_register, value, |
| bit_width); |
| break; |
| |
| case ACPI_WRITE: |
| |
| status = |
| acpi_os_write_pci_configuration(pci_id, pci_register, |
| *value, bit_width); |
| break; |
| |
| default: |
| |
| status = AE_BAD_PARAMETER; |
| break; |
| } |
| |
| return_ACPI_STATUS(status); |
| } |
| #endif |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_ex_cmos_space_handler |
| * |
| * PARAMETERS: function - Read or Write operation |
| * address - Where in the space to read or write |
| * bit_width - Field width in bits (8, 16, or 32) |
| * value - Pointer to in or out value |
| * handler_context - Pointer to Handler's context |
| * region_context - Pointer to context specific to the |
| * accessed region |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Handler for the CMOS address space (Op Region) |
| * |
| ******************************************************************************/ |
| |
| acpi_status |
| acpi_ex_cmos_space_handler(u32 function, |
| acpi_physical_address address, |
| u32 bit_width, |
| u64 *value, |
| void *handler_context, void *region_context) |
| { |
| acpi_status status = AE_OK; |
| |
| ACPI_FUNCTION_TRACE(ex_cmos_space_handler); |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| #ifdef ACPI_PCI_CONFIGURED |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_ex_pci_bar_space_handler |
| * |
| * PARAMETERS: function - Read or Write operation |
| * address - Where in the space to read or write |
| * bit_width - Field width in bits (8, 16, or 32) |
| * value - Pointer to in or out value |
| * handler_context - Pointer to Handler's context |
| * region_context - Pointer to context specific to the |
| * accessed region |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Handler for the PCI bar_target address space (Op Region) |
| * |
| ******************************************************************************/ |
| |
| acpi_status |
| acpi_ex_pci_bar_space_handler(u32 function, |
| acpi_physical_address address, |
| u32 bit_width, |
| u64 *value, |
| void *handler_context, void *region_context) |
| { |
| acpi_status status = AE_OK; |
| |
| ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler); |
| |
| return_ACPI_STATUS(status); |
| } |
| #endif |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_ex_data_table_space_handler |
| * |
| * PARAMETERS: function - Read or Write operation |
| * address - Where in the space to read or write |
| * bit_width - Field width in bits (8, 16, or 32) |
| * value - Pointer to in or out value |
| * handler_context - Pointer to Handler's context |
| * region_context - Pointer to context specific to the |
| * accessed region |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Handler for the Data Table address space (Op Region) |
| * |
| ******************************************************************************/ |
| |
| acpi_status |
| acpi_ex_data_table_space_handler(u32 function, |
| acpi_physical_address address, |
| u32 bit_width, |
| u64 *value, |
| void *handler_context, void *region_context) |
| { |
| ACPI_FUNCTION_TRACE(ex_data_table_space_handler); |
| |
| /* |
| * Perform the memory read or write. The bit_width was already |
| * validated. |
| */ |
| switch (function) { |
| case ACPI_READ: |
| |
| memcpy(ACPI_CAST_PTR(char, value), |
| ACPI_PHYSADDR_TO_PTR(address), ACPI_DIV_8(bit_width)); |
| break; |
| |
| case ACPI_WRITE: |
| |
| memcpy(ACPI_PHYSADDR_TO_PTR(address), |
| ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width)); |
| break; |
| |
| default: |
| |
| return_ACPI_STATUS(AE_BAD_PARAMETER); |
| } |
| |
| return_ACPI_STATUS(AE_OK); |
| } |
