/****************************************************************************** * * Module Name: amregion - ACPI default Op_region (address space) handlers * $Revision: 44 $ * *****************************************************************************/ /* * Copyright (C) 2000, 2001 R. Byron Moore * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "acpi.h" #include "acinterp.h" #include "amlcode.h" #include "acnamesp.h" #include "achware.h" #include "acevents.h" #define _COMPONENT INTERPRETER MODULE_NAME ("amregion") /******************************************************************************* * * FUNCTION: Acpi_aml_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_aml_system_memory_space_handler ( u32 function, ACPI_PHYSICAL_ADDRESS address, u32 bit_width, u32 *value, void *handler_context, void *region_context) { ACPI_STATUS status = AE_OK; void *logical_addr_ptr = NULL; MEM_HANDLER_CONTEXT *mem_info = region_context; u32 length; /* Validate and translate the bit width */ switch (bit_width) { case 8: length = 1; break; case 16: length = 2; break; case 32: length = 4; break; default: return (AE_AML_OPERAND_VALUE); break; } /* * 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); } mem_info->mapped_length = 0; /* In case of failure below */ /* Create a new mapping starting at the address given */ status = acpi_os_map_memory (address, SYSMEM_REGION_WINDOW_SIZE, (void **) &mem_info->mapped_logical_address); if (ACPI_FAILURE (status)) { return (status); } /* TBD: should these pointers go to 64-bit in all cases ? */ mem_info->mapped_physical_address = address; mem_info->mapped_length = SYSMEM_REGION_WINDOW_SIZE; } /* * Generate a logical pointer corresponding to the address we want to * access */ /* TBD: should these pointers go to 64-bit in all cases ? */ logical_addr_ptr = mem_info->mapped_logical_address + ((ACPI_INTEGER) address - (ACPI_INTEGER) mem_info->mapped_physical_address); /* Perform the memory read or write */ switch (function) { case ADDRESS_SPACE_READ: switch (bit_width) { case 8: *value = (u32)* (u8 *) logical_addr_ptr; break; case 16: MOVE_UNALIGNED16_TO_32 (value, logical_addr_ptr); break; case 32: MOVE_UNALIGNED32_TO_32 (value, logical_addr_ptr); break; } break; case ADDRESS_SPACE_WRITE: switch (bit_width) { case 8: *(u8 *) logical_addr_ptr = (u8) *value; break; case 16: MOVE_UNALIGNED16_TO_16 (logical_addr_ptr, value); break; case 32: MOVE_UNALIGNED32_TO_32 (logical_addr_ptr, value); break; } break; default: status = AE_BAD_PARAMETER; break; } return (status); } /******************************************************************************* * * FUNCTION: Acpi_aml_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_aml_system_io_space_handler ( u32 function, ACPI_PHYSICAL_ADDRESS address, u32 bit_width, u32 *value, void *handler_context, void *region_context) { ACPI_STATUS status = AE_OK; /* Decode the function parameter */ switch (function) { case ADDRESS_SPACE_READ: switch (bit_width) { /* I/O Port width */ case 8: *value = (u32) acpi_os_in8 ((ACPI_IO_ADDRESS) address); break; case 16: *value = (u32) acpi_os_in16 ((ACPI_IO_ADDRESS) address); break; case 32: *value = acpi_os_in32 ((ACPI_IO_ADDRESS) address); break; default: status = AE_AML_OPERAND_VALUE; } break; case ADDRESS_SPACE_WRITE: switch (bit_width) { /* I/O Port width */ case 8: acpi_os_out8 ((ACPI_IO_ADDRESS) address, (u8) *value); break; case 16: acpi_os_out16 ((ACPI_IO_ADDRESS) address, (u16) *value); break; case 32: acpi_os_out32 ((ACPI_IO_ADDRESS) address, *value); break; default: status = AE_AML_OPERAND_VALUE; } break; default: status = AE_BAD_PARAMETER; break; } return (status); } /******************************************************************************* * * FUNCTION: Acpi_aml_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_aml_pci_config_space_handler ( u32 function, ACPI_PHYSICAL_ADDRESS address, u32 bit_width, u32 *value, void *handler_context, void *region_context) { ACPI_STATUS status = AE_OK; u32 pci_bus; u32 dev_func; u8 pci_reg; PCI_HANDLER_CONTEXT *PCIcontext; /* * The arguments to Acpi_os(Read|Write)Pci_cfg(Byte|Word|Dword) are: * * Seg_bus - 0xSSSSBBBB - SSSS is the PCI bus segment * BBBB is the PCI bus number * * Dev_func - 0xDDDDFFFF - DDDD is the PCI device number * FFFF is the PCI device function number * * Reg_num - Config space register must be < 40h * * Value - input value for write, output for read * */ PCIcontext = (PCI_HANDLER_CONTEXT *) region_context; pci_bus = LOWORD(PCIcontext->seg) << 16; pci_bus |= LOWORD(PCIcontext->bus); dev_func = PCIcontext->dev_func; pci_reg = (u8) address; switch (function) { case ADDRESS_SPACE_READ: *value = 0; switch (bit_width) { /* PCI Register width */ case 8: status = acpi_os_read_pci_cfg_byte (pci_bus, dev_func, pci_reg, (u8 *) value); break; case 16: status = acpi_os_read_pci_cfg_word (pci_bus, dev_func, pci_reg, (u16 *) value); break; case 32: status = acpi_os_read_pci_cfg_dword (pci_bus, dev_func, pci_reg, value); break; default: status = AE_AML_OPERAND_VALUE; } /* Switch bit_width */ break; case ADDRESS_SPACE_WRITE: switch (bit_width) { /* PCI Register width */ case 8: status = acpi_os_write_pci_cfg_byte (pci_bus, dev_func, pci_reg, *(u8 *) value); break; case 16: status = acpi_os_write_pci_cfg_word (pci_bus, dev_func, pci_reg, *(u16 *) value); break; case 32: status = acpi_os_write_pci_cfg_dword (pci_bus, dev_func, pci_reg, *value); break; default: status = AE_AML_OPERAND_VALUE; } /* Switch bit_width */ break; default: status = AE_BAD_PARAMETER; break; } return (status); }