| |
| /****************************************************************************** |
| * |
| * Module Name: exregion - ACPI default op_region (address space) handlers |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2005, R. Byron Moore |
| * 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 <acpi/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, |
| acpi_integer * 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 window_size; |
| #ifndef ACPI_MISALIGNED_TRANSFERS |
| 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_DEBUG_PRINT((ACPI_DB_ERROR, |
| "Invalid system_memory width %d\n", |
| bit_width)); |
| return_ACPI_STATUS(AE_AML_OPERAND_VALUE); |
| } |
| |
| #ifndef ACPI_MISALIGNED_TRANSFERS |
| /* |
| * Hardware does not support non-aligned data transfers, we must verify |
| * the request. |
| */ |
| (void)acpi_ut_short_divide((acpi_integer) 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) || |
| (((acpi_integer) address + length) > ((acpi_integer) |
| 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); |
| } |
| |
| /* |
| * Don't attempt to map memory beyond the end of the region, and |
| * constrain the maximum mapping size to something reasonable. |
| */ |
| window_size = (acpi_size) |
| ((mem_info->address + mem_info->length) - address); |
| |
| if (window_size > ACPI_SYSMEM_REGION_WINDOW_SIZE) { |
| window_size = ACPI_SYSMEM_REGION_WINDOW_SIZE; |
| } |
| |
| /* Create a new mapping starting at the address given */ |
| |
| status = acpi_os_map_memory(address, window_size, |
| (void **)&mem_info-> |
| mapped_logical_address); |
| if (ACPI_FAILURE(status)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "Could not map memory at %8.8X%8.8X, size %X\n", |
| ACPI_FORMAT_UINT64(address), |
| (u32) window_size)); |
| mem_info->mapped_length = 0; |
| return_ACPI_STATUS(status); |
| } |
| |
| /* Save the physical address and mapping size */ |
| |
| mem_info->mapped_physical_address = address; |
| mem_info->mapped_length = window_size; |
| } |
| |
| /* |
| * Generate a logical pointer corresponding to the address we want to |
| * access |
| */ |
| logical_addr_ptr = mem_info->mapped_logical_address + |
| ((acpi_integer) address - |
| (acpi_integer) mem_info->mapped_physical_address); |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "system_memory %d (%d width) Address=%8.8X%8.8X\n", |
| function, bit_width, 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 = (acpi_integer) * ((u8 *) logical_addr_ptr); |
| break; |
| |
| case 16: |
| *value = (acpi_integer) * ((u16 *) logical_addr_ptr); |
| break; |
| |
| case 32: |
| *value = (acpi_integer) * ((u32 *) logical_addr_ptr); |
| break; |
| |
| #if ACPI_MACHINE_WIDTH != 16 |
| case 64: |
| *value = (acpi_integer) * ((u64 *) logical_addr_ptr); |
| break; |
| #endif |
| default: |
| /* bit_width was already validated */ |
| break; |
| } |
| break; |
| |
| case ACPI_WRITE: |
| |
| switch (bit_width) { |
| case 8: |
| *(u8 *) logical_addr_ptr = (u8) * value; |
| break; |
| |
| case 16: |
| *(u16 *) logical_addr_ptr = (u16) * value; |
| break; |
| |
| case 32: |
| *(u32 *) logical_addr_ptr = (u32) * value; |
| break; |
| |
| #if ACPI_MACHINE_WIDTH != 16 |
| case 64: |
| *(u64 *) logical_addr_ptr = (u64) * value; |
| break; |
| #endif |
| |
| 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, |
| acpi_integer * 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 %d (%d width) Address=%8.8X%8.8X\n", |
| function, bit_width, ACPI_FORMAT_UINT64(address))); |
| |
| /* Decode the function parameter */ |
| |
| switch (function) { |
| case ACPI_READ: |
| |
| status = acpi_os_read_port((acpi_io_address) address, |
| &value32, bit_width); |
| *value = value32; |
| break; |
| |
| case ACPI_WRITE: |
| |
| status = acpi_os_write_port((acpi_io_address) address, |
| (u32) * value, bit_width); |
| break; |
| |
| default: |
| status = AE_BAD_PARAMETER; |
| break; |
| } |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| /******************************************************************************* |
| * |
| * 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, |
| acpi_integer * 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 %d (%d) 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); |
| } |
| |
| /******************************************************************************* |
| * |
| * 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, |
| acpi_integer * value, |
| void *handler_context, void *region_context) |
| { |
| acpi_status status = AE_OK; |
| |
| ACPI_FUNCTION_TRACE("ex_cmos_space_handler"); |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| /******************************************************************************* |
| * |
| * 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, |
| acpi_integer * value, |
| void *handler_context, void *region_context) |
| { |
| acpi_status status = AE_OK; |
| |
| ACPI_FUNCTION_TRACE("ex_pci_bar_space_handler"); |
| |
| return_ACPI_STATUS(status); |
| } |
| |
| /******************************************************************************* |
| * |
| * 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, |
| acpi_integer * value, |
| void *handler_context, void *region_context) |
| { |
| acpi_status status = AE_OK; |
| u32 byte_width = ACPI_DIV_8(bit_width); |
| u32 i; |
| char *logical_addr_ptr; |
| |
| ACPI_FUNCTION_TRACE("ex_data_table_space_handler"); |
| |
| logical_addr_ptr = ACPI_PHYSADDR_TO_PTR(address); |
| |
| /* Perform the memory read or write */ |
| |
| switch (function) { |
| case ACPI_READ: |
| |
| for (i = 0; i < byte_width; i++) { |
| ((char *)value)[i] = logical_addr_ptr[i]; |
| } |
| break; |
| |
| case ACPI_WRITE: |
| default: |
| |
| return_ACPI_STATUS(AE_SUPPORT); |
| } |
| |
| return_ACPI_STATUS(status); |
| } |
