static acpi_status acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width) { u32 i; u32 byte_width; acpi_io_address last_address; const struct acpi_port_info *port_info; ACPI_FUNCTION_TRACE(hw_validate_io_request); /* Supported widths are 8/16/32 */ if ((bit_width != 8) && (bit_width != 16) && (bit_width != 32)) { ACPI_ERROR((AE_INFO, "Bad BitWidth parameter: %8.8X", bit_width)); return AE_BAD_PARAMETER; } port_info = acpi_protected_ports; byte_width = ACPI_DIV_8(bit_width); last_address = address + byte_width - 1; ACPI_DEBUG_PRINT((ACPI_DB_IO, "Address %p LastAddress %p Length %X", ACPI_CAST_PTR(void, address), ACPI_CAST_PTR(void, last_address), byte_width)); /* Maximum 16-bit address in I/O space */ if (last_address > ACPI_UINT16_MAX) { ACPI_ERROR((AE_INFO, "Illegal I/O port address/length above 64K: %p/0x%X", ACPI_CAST_PTR(void, address), byte_width)); return_ACPI_STATUS(AE_LIMIT); }
static ACPI_NAMESPACE_NODE * AcpiDmGetResourceNode ( ACPI_NAMESPACE_NODE *BufferNode, UINT32 BitIndex) { ACPI_NAMESPACE_NODE *Node; UINT32 ByteIndex = ACPI_DIV_8 (BitIndex); /* * Child list contains an entry for each resource descriptor. Find * the descriptor that corresponds to the Index. * * If there are no children, this is not a resource template */ Node = BufferNode->Child; while (Node) { /* * Check if the Index falls within this resource. * * Value contains the resource offset, Object contains the resource * length (both in bytes) */ if ((ByteIndex >= Node->Value) && (ByteIndex < (Node->Value + Node->Length))) { return (Node); } Node = Node->Peer; } return (NULL); }
acpi_status acpi_ex_prep_common_field_object(union acpi_operand_object *obj_desc, u8 field_flags, u8 field_attribute, u32 field_bit_position, u32 field_bit_length) { u32 access_bit_width; u32 byte_alignment; u32 nearest_byte_address; ACPI_FUNCTION_TRACE(ex_prep_common_field_object); obj_desc->common_field.field_flags = field_flags; obj_desc->common_field.attribute = field_attribute; obj_desc->common_field.bit_length = field_bit_length; access_bit_width = acpi_ex_decode_field_access(obj_desc, field_flags, &byte_alignment); if (!access_bit_width) { return_ACPI_STATUS(AE_AML_OPERAND_VALUE); } obj_desc->common_field.access_byte_width = (u8) ACPI_DIV_8(access_bit_width); obj_desc->common_field.access_bit_width = (u8) access_bit_width; nearest_byte_address = ACPI_ROUND_BITS_DOWN_TO_BYTES(field_bit_position); obj_desc->common_field.base_byte_offset = (u32) ACPI_ROUND_DOWN(nearest_byte_address, byte_alignment); obj_desc->common_field.start_field_bit_offset = (u8) (field_bit_position - ACPI_MUL_8(obj_desc->common_field.base_byte_offset)); if ((obj_desc->common_field.start_field_bit_offset + field_bit_length) <= (u16) access_bit_width) { obj_desc->common.flags |= AOPOBJ_SINGLE_DATUM; } return_ACPI_STATUS(AE_OK); }
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); }
acpi_status acpi_ex_prep_common_field_object(union acpi_operand_object *obj_desc, u8 field_flags, u8 field_attribute, u32 field_bit_position, u32 field_bit_length) { u32 access_bit_width; u32 byte_alignment; u32 nearest_byte_address; ACPI_FUNCTION_TRACE(ex_prep_common_field_object); /* * Note: the structure being initialized is the * ACPI_COMMON_FIELD_INFO; No structure fields outside of the common * area are initialized by this procedure. */ obj_desc->common_field.field_flags = field_flags; obj_desc->common_field.attribute = field_attribute; obj_desc->common_field.bit_length = field_bit_length; /* * Decode the access type so we can compute offsets. The access type gives * two pieces of information - the width of each field access and the * necessary byte_alignment (address granularity) of the access. * * For any_acc, the access_bit_width is the largest width that is both * necessary and possible in an attempt to access the whole field in one * I/O operation. However, for any_acc, the byte_alignment is always one * byte. * * For all Buffer Fields, the byte_alignment is always one byte. * * For all other access types (Byte, Word, Dword, Qword), the Bitwidth is * the same (equivalent) as the byte_alignment. */ access_bit_width = acpi_ex_decode_field_access(obj_desc, field_flags, &byte_alignment); if (!access_bit_width) { return_ACPI_STATUS(AE_AML_OPERAND_VALUE); } /* Setup width (access granularity) fields */ obj_desc->common_field.access_byte_width = (u8) ACPI_DIV_8(access_bit_width); /* 1, 2, 4, 8 */ obj_desc->common_field.access_bit_width = (u8) access_bit_width; /* * base_byte_offset is the address of the start of the field within the * region. It is the byte address of the first *datum* (field-width data * unit) of the field. (i.e., the first datum that contains at least the * first *bit* of the field.) * * Note: byte_alignment is always either equal to the access_bit_width or 8 * (Byte access), and it defines the addressing granularity of the parent * region or buffer. */ nearest_byte_address = ACPI_ROUND_BITS_DOWN_TO_BYTES(field_bit_position); obj_desc->common_field.base_byte_offset = (u32) ACPI_ROUND_DOWN(nearest_byte_address, byte_alignment); /* * start_field_bit_offset is the offset of the first bit of the field within * a field datum. */ obj_desc->common_field.start_field_bit_offset = (u8) (field_bit_position - ACPI_MUL_8(obj_desc->common_field.base_byte_offset)); return_ACPI_STATUS(AE_OK); }
static u32 acpi_ex_generate_access(u32 field_bit_offset, u32 field_bit_length, u32 region_length) { u32 field_byte_length; u32 field_byte_offset; u32 field_byte_end_offset; u32 access_byte_width; u32 field_start_offset; u32 field_end_offset; u32 minimum_access_width = 0xFFFFFFFF; u32 minimum_accesses = 0xFFFFFFFF; u32 accesses; ACPI_FUNCTION_TRACE(ex_generate_access); /* */ field_byte_offset = ACPI_DIV_8(ACPI_ROUND_DOWN(field_bit_offset, 8)); field_byte_end_offset = ACPI_DIV_8(ACPI_ROUND_UP(field_bit_length + field_bit_offset, 8)); field_byte_length = field_byte_end_offset - field_byte_offset; ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Bit length %u, Bit offset %u\n", field_bit_length, field_bit_offset)); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Byte Length %u, Byte Offset %u, End Offset %u\n", field_byte_length, field_byte_offset, field_byte_end_offset)); /* */ for (access_byte_width = 1; access_byte_width <= 8; access_byte_width <<= 1) { /* */ if (ACPI_ROUND_UP(field_byte_end_offset, access_byte_width) <= region_length) { field_start_offset = ACPI_ROUND_DOWN(field_byte_offset, access_byte_width) / access_byte_width; field_end_offset = ACPI_ROUND_UP((field_byte_length + field_byte_offset), access_byte_width) / access_byte_width; accesses = field_end_offset - field_start_offset; ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "AccessWidth %u end is within region\n", access_byte_width)); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Field Start %u, Field End %u -- requires %u accesses\n", field_start_offset, field_end_offset, accesses)); /* */ if (accesses <= 1) { ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Entire field can be accessed with one operation of size %u\n", access_byte_width)); return_VALUE(access_byte_width); } /* */ if (accesses < minimum_accesses) { minimum_accesses = accesses; minimum_access_width = access_byte_width; } } else { ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "AccessWidth %u end is NOT within region\n", access_byte_width)); if (access_byte_width == 1) { ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Field goes beyond end-of-region!\n")); /* */ return_VALUE(0); } /* */ ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Backing off to previous optimal access width of %u\n", minimum_access_width)); return_VALUE(minimum_access_width); } } /* */ ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Cannot access field in one operation, using width 8\n")); return_VALUE(8); }
acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info) { union acpi_operand_object *obj_desc; union acpi_operand_object *second_desc = NULL; acpi_status status; u32 access_byte_width; u32 type; ACPI_FUNCTION_TRACE(ex_prep_field_value); /* */ if (info->field_type != ACPI_TYPE_LOCAL_INDEX_FIELD) { if (!info->region_node) { ACPI_ERROR((AE_INFO, "Null RegionNode")); return_ACPI_STATUS(AE_AML_NO_OPERAND); } type = acpi_ns_get_type(info->region_node); if (type != ACPI_TYPE_REGION) { ACPI_ERROR((AE_INFO, "Needed Region, found type 0x%X (%s)", type, acpi_ut_get_type_name(type))); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } } /* */ obj_desc = acpi_ut_create_internal_object(info->field_type); if (!obj_desc) { return_ACPI_STATUS(AE_NO_MEMORY); } /* */ obj_desc->common_field.node = info->field_node; status = acpi_ex_prep_common_field_object(obj_desc, info->field_flags, info->attribute, info->field_bit_position, info->field_bit_length); if (ACPI_FAILURE(status)) { acpi_ut_delete_object_desc(obj_desc); return_ACPI_STATUS(status); } /* */ switch (info->field_type) { case ACPI_TYPE_LOCAL_REGION_FIELD: obj_desc->field.region_obj = acpi_ns_get_attached_object(info->region_node); /* */ obj_desc->field.access_length = info->access_length; if (info->connection_node) { second_desc = info->connection_node->object; if (!(second_desc->common.flags & AOPOBJ_DATA_VALID)) { status = acpi_ds_get_buffer_arguments(second_desc); if (ACPI_FAILURE(status)) { acpi_ut_delete_object_desc(obj_desc); return_ACPI_STATUS(status); } } obj_desc->field.resource_buffer = second_desc->buffer.pointer; obj_desc->field.resource_length = (u16)second_desc->buffer.length; } else if (info->resource_buffer) { obj_desc->field.resource_buffer = info->resource_buffer; obj_desc->field.resource_length = info->resource_length; } /* */ if ((obj_desc->field.region_obj->region.space_id == ACPI_ADR_SPACE_EC) && (obj_desc->common_field.bit_length > 8)) { access_byte_width = ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field. bit_length); /* */ if (access_byte_width < 256) { obj_desc->common_field.access_byte_width = (u8)access_byte_width; } } /* */ acpi_ut_add_reference(obj_desc->field.region_obj); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "RegionField: BitOff %X, Off %X, Gran %X, Region %p\n", obj_desc->field.start_field_bit_offset, obj_desc->field.base_byte_offset, obj_desc->field.access_byte_width, obj_desc->field.region_obj)); break; case ACPI_TYPE_LOCAL_BANK_FIELD: obj_desc->bank_field.value = info->bank_value; obj_desc->bank_field.region_obj = acpi_ns_get_attached_object(info->region_node); obj_desc->bank_field.bank_obj = acpi_ns_get_attached_object(info->register_node); /* */ acpi_ut_add_reference(obj_desc->bank_field.region_obj); acpi_ut_add_reference(obj_desc->bank_field.bank_obj); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Bank Field: BitOff %X, Off %X, Gran %X, Region %p, BankReg %p\n", obj_desc->bank_field.start_field_bit_offset, obj_desc->bank_field.base_byte_offset, obj_desc->field.access_byte_width, obj_desc->bank_field.region_obj, obj_desc->bank_field.bank_obj)); /* */ second_desc = obj_desc->common.next_object; second_desc->extra.aml_start = ACPI_CAST_PTR(union acpi_parse_object, info->data_register_node)->named.data; second_desc->extra.aml_length = ACPI_CAST_PTR(union acpi_parse_object, info->data_register_node)->named.length; break; case ACPI_TYPE_LOCAL_INDEX_FIELD: /* */ obj_desc->index_field.index_obj = acpi_ns_get_attached_object(info->register_node); obj_desc->index_field.data_obj = acpi_ns_get_attached_object(info->data_register_node); if (!obj_desc->index_field.data_obj || !obj_desc->index_field.index_obj) { ACPI_ERROR((AE_INFO, "Null Index Object during field prep")); acpi_ut_delete_object_desc(obj_desc); return_ACPI_STATUS(AE_AML_INTERNAL); } /* */ acpi_ut_add_reference(obj_desc->index_field.data_obj); acpi_ut_add_reference(obj_desc->index_field.index_obj); /* */ obj_desc->index_field.value = (u32) ACPI_ROUND_DOWN(ACPI_DIV_8(info->field_bit_position), obj_desc->index_field. access_byte_width); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "IndexField: BitOff %X, Off %X, Value %X, Gran %X, Index %p, Data %p\n", obj_desc->index_field.start_field_bit_offset, obj_desc->index_field.base_byte_offset, obj_desc->index_field.value, obj_desc->field.access_byte_width, obj_desc->index_field.index_obj, obj_desc->index_field.data_obj)); break; default: /* */ break; } /* */ status = acpi_ns_attach_object(info->field_node, obj_desc, acpi_ns_get_type(info->field_node)); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Set NamedObj %p [%4.4s], ObjDesc %p\n", info->field_node, acpi_ut_get_node_name(info->field_node), obj_desc)); /* */ acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status); }
ACPI_STATUS AcpiExPrepFieldValue ( ACPI_CREATE_FIELD_INFO *Info) { ACPI_OPERAND_OBJECT *ObjDesc; ACPI_OPERAND_OBJECT *SecondDesc = NULL; ACPI_STATUS Status; UINT32 AccessByteWidth; UINT32 Type; ACPI_FUNCTION_TRACE (ExPrepFieldValue); /* Parameter validation */ if (Info->FieldType != ACPI_TYPE_LOCAL_INDEX_FIELD) { if (!Info->RegionNode) { ACPI_ERROR ((AE_INFO, "Null RegionNode")); return_ACPI_STATUS (AE_AML_NO_OPERAND); } Type = AcpiNsGetType (Info->RegionNode); if (Type != ACPI_TYPE_REGION) { ACPI_ERROR ((AE_INFO, "Needed Region, found type 0x%X (%s)", Type, AcpiUtGetTypeName (Type))); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } } /* Allocate a new field object */ ObjDesc = AcpiUtCreateInternalObject (Info->FieldType); if (!ObjDesc) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Initialize areas of the object that are common to all fields */ ObjDesc->CommonField.Node = Info->FieldNode; Status = AcpiExPrepCommonFieldObject (ObjDesc, Info->FieldFlags, Info->Attribute, Info->FieldBitPosition, Info->FieldBitLength); if (ACPI_FAILURE (Status)) { AcpiUtDeleteObjectDesc (ObjDesc); return_ACPI_STATUS (Status); } /* Initialize areas of the object that are specific to the field type */ switch (Info->FieldType) { case ACPI_TYPE_LOCAL_REGION_FIELD: ObjDesc->Field.RegionObj = AcpiNsGetAttachedObject (Info->RegionNode); /* Fields specific to GenericSerialBus fields */ ObjDesc->Field.AccessLength = Info->AccessLength; if (Info->ConnectionNode) { SecondDesc = Info->ConnectionNode->Object; if (!(SecondDesc->Common.Flags & AOPOBJ_DATA_VALID)) { Status = AcpiDsGetBufferArguments (SecondDesc); if (ACPI_FAILURE (Status)) { AcpiUtDeleteObjectDesc (ObjDesc); return_ACPI_STATUS (Status); } } ObjDesc->Field.ResourceBuffer = SecondDesc->Buffer.Pointer; ObjDesc->Field.ResourceLength = (UINT16) SecondDesc->Buffer.Length; } else if (Info->ResourceBuffer) { ObjDesc->Field.ResourceBuffer = Info->ResourceBuffer; ObjDesc->Field.ResourceLength = Info->ResourceLength; } /* Allow full data read from EC address space */ if ((ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_EC) && (ObjDesc->CommonField.BitLength > 8)) { AccessByteWidth = ACPI_ROUND_BITS_UP_TO_BYTES ( ObjDesc->CommonField.BitLength); /* Maximum byte width supported is 255 */ if (AccessByteWidth < 256) { ObjDesc->CommonField.AccessByteWidth = (UINT8) AccessByteWidth; } } /* An additional reference for the container */ AcpiUtAddReference (ObjDesc->Field.RegionObj); ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "RegionField: BitOff %X, Off %X, Gran %X, Region %p\n", ObjDesc->Field.StartFieldBitOffset, ObjDesc->Field.BaseByteOffset, ObjDesc->Field.AccessByteWidth, ObjDesc->Field.RegionObj)); break; case ACPI_TYPE_LOCAL_BANK_FIELD: ObjDesc->BankField.Value = Info->BankValue; ObjDesc->BankField.RegionObj = AcpiNsGetAttachedObject (Info->RegionNode); ObjDesc->BankField.BankObj = AcpiNsGetAttachedObject (Info->RegisterNode); /* An additional reference for the attached objects */ AcpiUtAddReference (ObjDesc->BankField.RegionObj); AcpiUtAddReference (ObjDesc->BankField.BankObj); ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Bank Field: BitOff %X, Off %X, Gran %X, Region %p, BankReg %p\n", ObjDesc->BankField.StartFieldBitOffset, ObjDesc->BankField.BaseByteOffset, ObjDesc->Field.AccessByteWidth, ObjDesc->BankField.RegionObj, ObjDesc->BankField.BankObj)); /* * Remember location in AML stream of the field unit * opcode and operands -- since the BankValue * operands must be evaluated. */ SecondDesc = ObjDesc->Common.NextObject; SecondDesc->Extra.AmlStart = ACPI_CAST_PTR (ACPI_PARSE_OBJECT, Info->DataRegisterNode)->Named.Data; SecondDesc->Extra.AmlLength = ACPI_CAST_PTR (ACPI_PARSE_OBJECT, Info->DataRegisterNode)->Named.Length; break; case ACPI_TYPE_LOCAL_INDEX_FIELD: /* Get the Index and Data registers */ ObjDesc->IndexField.IndexObj = AcpiNsGetAttachedObject (Info->RegisterNode); ObjDesc->IndexField.DataObj = AcpiNsGetAttachedObject (Info->DataRegisterNode); if (!ObjDesc->IndexField.DataObj || !ObjDesc->IndexField.IndexObj) { ACPI_ERROR ((AE_INFO, "Null Index Object during field prep")); AcpiUtDeleteObjectDesc (ObjDesc); return_ACPI_STATUS (AE_AML_INTERNAL); } /* An additional reference for the attached objects */ AcpiUtAddReference (ObjDesc->IndexField.DataObj); AcpiUtAddReference (ObjDesc->IndexField.IndexObj); /* * April 2006: Changed to match MS behavior * * The value written to the Index register is the byte offset of the * target field in units of the granularity of the IndexField * * Previously, the value was calculated as an index in terms of the * width of the Data register, as below: * * ObjDesc->IndexField.Value = (UINT32) * (Info->FieldBitPosition / ACPI_MUL_8 ( * ObjDesc->Field.AccessByteWidth)); * * February 2006: Tried value as a byte offset: * ObjDesc->IndexField.Value = (UINT32) * ACPI_DIV_8 (Info->FieldBitPosition); */ ObjDesc->IndexField.Value = (UINT32) ACPI_ROUND_DOWN ( ACPI_DIV_8 (Info->FieldBitPosition), ObjDesc->IndexField.AccessByteWidth); ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "IndexField: BitOff %X, Off %X, Value %X, Gran %X, Index %p, Data %p\n", ObjDesc->IndexField.StartFieldBitOffset, ObjDesc->IndexField.BaseByteOffset, ObjDesc->IndexField.Value, ObjDesc->Field.AccessByteWidth, ObjDesc->IndexField.IndexObj, ObjDesc->IndexField.DataObj)); break; default: /* No other types should get here */ break; } /* * Store the constructed descriptor (ObjDesc) into the parent Node, * preserving the current type of that NamedObj. */ Status = AcpiNsAttachObject (Info->FieldNode, ObjDesc, AcpiNsGetType (Info->FieldNode)); ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Set NamedObj %p [%4.4s], ObjDesc %p\n", Info->FieldNode, AcpiUtGetNodeName (Info->FieldNode), ObjDesc)); /* Remove local reference to the object */ AcpiUtRemoveReference (ObjDesc); return_ACPI_STATUS (Status); }
ACPI_STATUS AcpiExPrepCommonFieldObject ( ACPI_OPERAND_OBJECT *ObjDesc, UINT8 FieldFlags, UINT8 FieldAttribute, UINT32 FieldBitPosition, UINT32 FieldBitLength) { UINT32 AccessBitWidth; UINT32 ByteAlignment; UINT32 NearestByteAddress; ACPI_FUNCTION_TRACE (ExPrepCommonFieldObject); /* * Note: the structure being initialized is the * ACPI_COMMON_FIELD_INFO; No structure fields outside of the common * area are initialized by this procedure. */ ObjDesc->CommonField.FieldFlags = FieldFlags; ObjDesc->CommonField.Attribute = FieldAttribute; ObjDesc->CommonField.BitLength = FieldBitLength; /* * Decode the access type so we can compute offsets. The access type gives * two pieces of information - the width of each field access and the * necessary ByteAlignment (address granularity) of the access. * * For AnyAcc, the AccessBitWidth is the largest width that is both * necessary and possible in an attempt to access the whole field in one * I/O operation. However, for AnyAcc, the ByteAlignment is always one * byte. * * For all Buffer Fields, the ByteAlignment is always one byte. * * For all other access types (Byte, Word, Dword, Qword), the Bitwidth is * the same (equivalent) as the ByteAlignment. */ AccessBitWidth = AcpiExDecodeFieldAccess (ObjDesc, FieldFlags, &ByteAlignment); if (!AccessBitWidth) { return_ACPI_STATUS (AE_AML_OPERAND_VALUE); } /* Setup width (access granularity) fields (values are: 1, 2, 4, 8) */ ObjDesc->CommonField.AccessByteWidth = (UINT8) ACPI_DIV_8 (AccessBitWidth); /* * BaseByteOffset is the address of the start of the field within the * region. It is the byte address of the first *datum* (field-width data * unit) of the field. (i.e., the first datum that contains at least the * first *bit* of the field.) * * Note: ByteAlignment is always either equal to the AccessBitWidth or 8 * (Byte access), and it defines the addressing granularity of the parent * region or buffer. */ NearestByteAddress = ACPI_ROUND_BITS_DOWN_TO_BYTES (FieldBitPosition); ObjDesc->CommonField.BaseByteOffset = (UINT32) ACPI_ROUND_DOWN (NearestByteAddress, ByteAlignment); /* * StartFieldBitOffset is the offset of the first bit of the field within * a field datum. */ ObjDesc->CommonField.StartFieldBitOffset = (UINT8) (FieldBitPosition - ACPI_MUL_8 (ObjDesc->CommonField.BaseByteOffset)); return_ACPI_STATUS (AE_OK); }
acpi_status acpi_ex_prep_common_field_object ( union acpi_operand_object *obj_desc, u8 field_flags, u8 field_attribute, u32 field_bit_position, u32 field_bit_length) { u32 access_bit_width; u32 byte_alignment; u32 nearest_byte_address; ACPI_FUNCTION_TRACE ("ex_prep_common_field_object"); /* * Note: the structure being initialized is the * ACPI_COMMON_FIELD_INFO; No structure fields outside of the common * area are initialized by this procedure. */ obj_desc->common_field.field_flags = field_flags; obj_desc->common_field.attribute = field_attribute; obj_desc->common_field.bit_length = field_bit_length; /* * Decode the access type so we can compute offsets. The access type gives * two pieces of information - the width of each field access and the * necessary byte_alignment (address granularity) of the access. * * For any_acc, the access_bit_width is the largest width that is both * necessary and possible in an attempt to access the whole field in one * I/O operation. However, for any_acc, the byte_alignment is always one * byte. * * For all Buffer Fields, the byte_alignment is always one byte. * * For all other access types (Byte, Word, Dword, Qword), the Bitwidth is * the same (equivalent) as the byte_alignment. */ access_bit_width = acpi_ex_decode_field_access (obj_desc, field_flags, &byte_alignment); if (!access_bit_width) { return_ACPI_STATUS (AE_AML_OPERAND_VALUE); } /* Setup width (access granularity) fields */ obj_desc->common_field.access_byte_width = (u8) ACPI_DIV_8 (access_bit_width); /* 1, 2, 4, 8 */ /* * base_byte_offset is the address of the start of the field within the * region. It is the byte address of the first *datum* (field-width data * unit) of the field. (i.e., the first datum that contains at least the * first *bit* of the field.) * * Note: byte_alignment is always either equal to the access_bit_width or 8 * (Byte access), and it defines the addressing granularity of the parent * region or buffer. */ nearest_byte_address = ACPI_ROUND_BITS_DOWN_TO_BYTES (field_bit_position); obj_desc->common_field.base_byte_offset = ACPI_ROUND_DOWN (nearest_byte_address, byte_alignment); /* * start_field_bit_offset is the offset of the first bit of the field within * a field datum. */ obj_desc->common_field.start_field_bit_offset = (u8) (field_bit_position - ACPI_MUL_8 (obj_desc->common_field.base_byte_offset)); /* * Valid bits -- the number of bits that compose a partial datum, * 1) At the end of the field within the region (arbitrary starting bit * offset) * 2) At the end of a buffer used to contain the field (starting offset * always zero) */ obj_desc->common_field.end_field_valid_bits = (u8) ((obj_desc->common_field.start_field_bit_offset + field_bit_length) % access_bit_width); /* start_buffer_bit_offset always = 0 */ obj_desc->common_field.end_buffer_valid_bits = (u8) (field_bit_length % access_bit_width); /* * datum_valid_bits is the number of valid field bits in the first * field datum. */ obj_desc->common_field.datum_valid_bits = (u8) (access_bit_width - obj_desc->common_field.start_field_bit_offset); /* * Does the entire field fit within a single field access element? (datum) * (i.e., without crossing a datum boundary) */ if ((obj_desc->common_field.start_field_bit_offset + field_bit_length) <= (u16) access_bit_width) { obj_desc->common.flags |= AOPOBJ_SINGLE_DATUM; } return_ACPI_STATUS (AE_OK); }
static ACPI_STATUS XfNamespaceLocateBegin ( ACPI_PARSE_OBJECT *Op, UINT32 Level, void *Context) { ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; ACPI_NAMESPACE_NODE *Node; ACPI_STATUS Status; ACPI_OBJECT_TYPE ObjectType; char *Path; UINT8 PassedArgs; ACPI_PARSE_OBJECT *NextOp; ACPI_PARSE_OBJECT *OwningOp; ACPI_PARSE_OBJECT *SpaceIdOp; UINT32 MinimumLength; UINT32 Offset; UINT32 FieldBitLength; UINT32 TagBitLength; UINT8 Message = 0; const ACPI_OPCODE_INFO *OpInfo; UINT32 Flags; ASL_METHOD_LOCAL *MethodLocals = NULL; ASL_METHOD_LOCAL *MethodArgs = NULL; int RegisterNumber; UINT32 i; ACPI_FUNCTION_TRACE_PTR (XfNamespaceLocateBegin, Op); if ((Op->Asl.AmlOpcode == AML_METHOD_OP) && Op->Asl.Node) { Node = Op->Asl.Node; /* Support for method LocalX/ArgX analysis */ if (!Node->MethodLocals) { /* Create local/arg info blocks */ MethodLocals = UtLocalCalloc ( sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_LOCALS); Node->MethodLocals = MethodLocals; MethodArgs = UtLocalCalloc ( sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_ARGS); Node->MethodArgs = MethodArgs; /* * Get the method argument count * First, get the name node */ NextOp = Op->Asl.Child; /* Get the NumArguments node */ NextOp = NextOp->Asl.Next; Node->ArgCount = (UINT8) (((UINT8) NextOp->Asl.Value.Integer) & 0x07); /* We will track all possible ArgXs */ for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) { if (i < Node->ArgCount) { /* Real Args are always "initialized" */ MethodArgs[i].Flags = ASL_ARG_INITIALIZED; } else { /* Other ArgXs can be used as locals */ MethodArgs[i].Flags = ASL_ARG_IS_LOCAL; } MethodArgs[i].Op = Op; } } } /* * If this node is the actual declaration of a name * [such as the XXXX name in "Method (XXXX)"], * we are not interested in it here. We only care about names that are * references to other objects within the namespace and the parent objects * of name declarations */ if (Op->Asl.CompileFlags & OP_IS_NAME_DECLARATION) { return_ACPI_STATUS (AE_OK); } OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); /* Check method LocalX variables */ if (OpInfo->Type == AML_TYPE_LOCAL_VARIABLE) { /* Find parent method Op */ NextOp = XfGetParentMethod (Op); if (!NextOp) { return_ACPI_STATUS (AE_OK); } /* Get method node */ Node = NextOp->Asl.Node; RegisterNumber = Op->Asl.AmlOpcode & 0x0007; /* 0x60 through 0x67 */ MethodLocals = Node->MethodLocals; if (Op->Asl.CompileFlags & OP_IS_TARGET) { /* Local is being initialized */ MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_INITIALIZED; MethodLocals[RegisterNumber].Op = Op; return_ACPI_STATUS (AE_OK); } /* Mark this Local as referenced */ MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_REFERENCED; MethodLocals[RegisterNumber].Op = Op; return_ACPI_STATUS (AE_OK); } /* Check method ArgX variables */ if (OpInfo->Type == AML_TYPE_METHOD_ARGUMENT) { /* Find parent method Op */ NextOp = XfGetParentMethod (Op); if (!NextOp) { return_ACPI_STATUS (AE_OK); } /* Get method node */ Node = NextOp->Asl.Node; /* Get Arg # */ RegisterNumber = Op->Asl.AmlOpcode - AML_ARG0; /* 0x68 through 0x6F */ MethodArgs = Node->MethodArgs; /* Mark this Arg as referenced */ MethodArgs[RegisterNumber].Flags |= ASL_ARG_REFERENCED; MethodArgs[RegisterNumber].Op = Op; if (Op->Asl.CompileFlags & OP_IS_TARGET) { /* Arg is being initialized */ MethodArgs[RegisterNumber].Flags |= ASL_ARG_INITIALIZED; } return_ACPI_STATUS (AE_OK); } /* * After method ArgX and LocalX, we are only interested in opcodes * that have an associated name */ if ((!(OpInfo->Flags & AML_NAMED)) && (!(OpInfo->Flags & AML_CREATE)) && (Op->Asl.ParseOpcode != PARSEOP_NAMESTRING) && (Op->Asl.ParseOpcode != PARSEOP_NAMESEG) && (Op->Asl.ParseOpcode != PARSEOP_METHODCALL) && (Op->Asl.ParseOpcode != PARSEOP_EXTERNAL)) { return_ACPI_STATUS (AE_OK); } /* * One special case: CondRefOf operator - we don't care if the name exists * or not at this point, just ignore it, the point of the operator is to * determine if the name exists at runtime. */ if ((Op->Asl.Parent) && (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)) { return_ACPI_STATUS (AE_OK); } /* * We must enable the "search-to-root" for single NameSegs, but * we have to be very careful about opening up scopes */ Flags = ACPI_NS_SEARCH_PARENT; if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || (Op->Asl.ParseOpcode == PARSEOP_METHODCALL) || (Op->Asl.ParseOpcode == PARSEOP_EXTERNAL)) { /* * These are name references, do not push the scope stack * for them. */ Flags |= ACPI_NS_DONT_OPEN_SCOPE; } /* Get the NamePath from the appropriate place */ if (OpInfo->Flags & AML_NAMED) { /* For nearly all NAMED operators, the name reference is the first child */ Path = Op->Asl.Child->Asl.Value.String; if (Op->Asl.AmlOpcode == AML_ALIAS_OP) { /* * ALIAS is the only oddball opcode, the name declaration * (alias name) is the second operand */ Path = Op->Asl.Child->Asl.Next->Asl.Value.String; } } else if (OpInfo->Flags & AML_CREATE) { /* Name must appear as the last parameter */ NextOp = Op->Asl.Child; while (!(NextOp->Asl.CompileFlags & OP_IS_NAME_DECLARATION)) { NextOp = NextOp->Asl.Next; } Path = NextOp->Asl.Value.String; } else { Path = Op->Asl.Value.String; } ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Type=%s\n", AcpiUtGetTypeName (ObjectType))); /* * Lookup the name in the namespace. Name must exist at this point, or it * is an invalid reference. * * The namespace is also used as a lookup table for references to resource * descriptors and the fields within them. */ AslGbl_NsLookupCount++; Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType, ACPI_IMODE_EXECUTE, Flags, WalkState, &Node); if (ACPI_FAILURE (Status)) { if (Status == AE_NOT_FOUND) { /* * We didn't find the name reference by path -- we can qualify this * a little better before we print an error message */ if (strlen (Path) == ACPI_NAME_SIZE) { /* A simple, one-segment ACPI name */ if (XfObjectExists (Path)) { /* * There exists such a name, but we couldn't get to it * from this scope */ AslError (ASL_ERROR, ASL_MSG_NOT_REACHABLE, Op, Op->Asl.ExternalName); } else { /* The name doesn't exist, period */ AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op, Op->Asl.ExternalName); } } else { /* The NamePath contains multiple NameSegs */ if ((OpInfo->Flags & AML_CREATE) || (OpInfo->ObjectType == ACPI_TYPE_LOCAL_ALIAS)) { /* * The new name is the last parameter. For the * CreateXXXXField and Alias operators */ NextOp = Op->Asl.Child; while (!(NextOp->Asl.CompileFlags & OP_IS_NAME_DECLARATION)) { NextOp = NextOp->Asl.Next; } AslError (ASL_ERROR, ASL_MSG_PREFIX_NOT_EXIST, NextOp, NextOp->Asl.ExternalName); } else if (OpInfo->Flags & AML_NAMED) { /* The new name is the first parameter */ AslError (ASL_ERROR, ASL_MSG_PREFIX_NOT_EXIST, Op, Op->Asl.ExternalName); } else if (Path[0] == AML_ROOT_PREFIX) { /* Full namepath from root, the object does not exist */ AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op, Op->Asl.ExternalName); } else { /* * Generic "not found" error. Cannot determine whether it * doesn't exist or just can't be reached. However, we * can differentiate between a NameSeg vs. NamePath. */ if (strlen (Op->Asl.ExternalName) == ACPI_NAME_SIZE) { AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op, Op->Asl.ExternalName); } else { AslError (ASL_ERROR, ASL_MSG_NAMEPATH_NOT_EXIST, Op, Op->Asl.ExternalName); } } } Status = AE_OK; } return_ACPI_STATUS (Status); } /* Check for an attempt to access an object in another method */ if (!XfValidateCrossReference (Op, OpInfo, Node)) { AslError (ASL_ERROR, ASL_MSG_TEMPORARY_OBJECT, Op, Op->Asl.ExternalName); return_ACPI_STATUS (Status); } /* Object was found above, check for an illegal forward reference */ if (Op->Asl.CompileFlags & OP_NOT_FOUND_DURING_LOAD) { /* * During the load phase, this Op was flagged as a possible * illegal forward reference * * Note: Allow "forward references" from within a method to an * object that is not within any method (module-level code) */ if (!WalkState->ScopeInfo || (UtGetParentMethod (Node) && !UtNodeIsDescendantOf (WalkState->ScopeInfo->Scope.Node, UtGetParentMethod (Node)))) { AslError (ASL_ERROR, ASL_MSG_ILLEGAL_FORWARD_REF, Op, Op->Asl.ExternalName); } } /* Check for a reference vs. name declaration */ if (!(OpInfo->Flags & AML_NAMED) && !(OpInfo->Flags & AML_CREATE)) { /* This node has been referenced, mark it for reference check */ Node->Flags |= ANOBJ_IS_REFERENCED; } /* Attempt to optimize the NamePath */ OptOptimizeNamePath (Op, OpInfo->Flags, WalkState, Path, Node); /* * 1) Dereference an alias (A name reference that is an alias) * Aliases are not nested, the alias always points to the final object */ if ((Op->Asl.ParseOpcode != PARSEOP_ALIAS) && (Node->Type == ACPI_TYPE_LOCAL_ALIAS)) { /* This node points back to the original PARSEOP_ALIAS */ NextOp = Node->Op; /* The first child is the alias target op */ NextOp = NextOp->Asl.Child; /* That in turn points back to original target alias node */ if (NextOp->Asl.Node) { Node = NextOp->Asl.Node; } /* Else - forward reference to alias, will be resolved later */ } /* 2) Check for a reference to a resource descriptor */ if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) || (Node->Type == ACPI_TYPE_LOCAL_RESOURCE)) { /* * This was a reference to a field within a resource descriptor. * Extract the associated field offset (either a bit or byte * offset depending on the field type) and change the named * reference into an integer for AML code generation */ Offset = Node->Value; TagBitLength = Node->Length; /* * If a field is being created, generate the length (in bits) of * the field. Note: Opcodes other than CreateXxxField and Index * can come through here. For other opcodes, we just need to * convert the resource tag reference to an integer offset. */ switch (Op->Asl.Parent->Asl.AmlOpcode) { case AML_CREATE_FIELD_OP: /* Variable "Length" field, in bits */ /* * We know the length operand is an integer constant because * we know that it contains a reference to a resource * descriptor tag. */ FieldBitLength = (UINT32) Op->Asl.Next->Asl.Value.Integer; break; case AML_CREATE_BIT_FIELD_OP: FieldBitLength = 1; break; case AML_CREATE_BYTE_FIELD_OP: case AML_INDEX_OP: FieldBitLength = 8; break; case AML_CREATE_WORD_FIELD_OP: FieldBitLength = 16; break; case AML_CREATE_DWORD_FIELD_OP: FieldBitLength = 32; break; case AML_CREATE_QWORD_FIELD_OP: FieldBitLength = 64; break; default: FieldBitLength = 0; break; } /* Check the field length against the length of the resource tag */ if (FieldBitLength) { if (TagBitLength < FieldBitLength) { Message = ASL_MSG_TAG_SMALLER; } else if (TagBitLength > FieldBitLength) { Message = ASL_MSG_TAG_LARGER; } if (Message) { sprintf (AslGbl_MsgBuffer, "Size mismatch, Tag: %u bit%s, Field: %u bit%s", TagBitLength, (TagBitLength > 1) ? "s" : "", FieldBitLength, (FieldBitLength > 1) ? "s" : ""); AslError (ASL_WARNING, Message, Op, AslGbl_MsgBuffer); } } /* Convert the BitOffset to a ByteOffset for certain opcodes */ switch (Op->Asl.Parent->Asl.AmlOpcode) { case AML_CREATE_BYTE_FIELD_OP: case AML_CREATE_WORD_FIELD_OP: case AML_CREATE_DWORD_FIELD_OP: case AML_CREATE_QWORD_FIELD_OP: case AML_INDEX_OP: Offset = ACPI_DIV_8 (Offset); break; default: break; } /* Now convert this node to an integer whose value is the field offset */ Op->Asl.AmlLength = 0; Op->Asl.ParseOpcode = PARSEOP_INTEGER; Op->Asl.Value.Integer = (UINT64) Offset; Op->Asl.CompileFlags |= OP_IS_RESOURCE_FIELD; OpcGenerateAmlOpcode (Op); } /* 3) Check for a method invocation */ else if ((((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG)) && (Node->Type == ACPI_TYPE_METHOD) && (Op->Asl.Parent) && (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_METHOD)) || (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)) { /* * A reference to a method within one of these opcodes is not an * invocation of the method, it is simply a reference to the method. * * September 2016: Removed DeRefOf from this list */ if ((Op->Asl.Parent) && ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_REFOF) || (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_PACKAGE) || (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)|| (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_OBJECTTYPE))) { return_ACPI_STATUS (AE_OK); } /* * There are two types of method invocation: * 1) Invocation with arguments -- the parser recognizes this * as a METHODCALL. * 2) Invocation with no arguments --the parser cannot determine that * this is a method invocation, therefore we have to figure it out * here. */ if (Node->Type != ACPI_TYPE_METHOD) { sprintf (AslGbl_MsgBuffer, "%s is a %s", Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type)); AslError (ASL_ERROR, ASL_MSG_NOT_METHOD, Op, AslGbl_MsgBuffer); return_ACPI_STATUS (AE_OK); } /* Save the method node in the caller's op */ Op->Asl.Node = Node; if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF) { return_ACPI_STATUS (AE_OK); } /* * This is a method invocation, with or without arguments. * Count the number of arguments, each appears as a child * under the parent node */ Op->Asl.ParseOpcode = PARSEOP_METHODCALL; UtSetParseOpName (Op); PassedArgs = 0; NextOp = Op->Asl.Child; while (NextOp) { PassedArgs++; NextOp = NextOp->Asl.Next; } if (Node->Value != ASL_EXTERNAL_METHOD && Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_EXTERNAL) { /* * Check the parsed arguments with the number expected by the * method declaration itself */ if (PassedArgs != Node->Value) { sprintf (AslGbl_MsgBuffer, "%s requires %u", Op->Asl.ExternalName, Node->Value); if (PassedArgs < Node->Value) { AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_LO, Op, AslGbl_MsgBuffer); } else { AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_HI, Op, AslGbl_MsgBuffer); } } } } /* 4) Check for an ASL Field definition */ else if ((Op->Asl.Parent) && ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_FIELD) || (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_BANKFIELD))) { /* * Offset checking for fields. If the parent operation region has a * constant length (known at compile time), we can check fields * defined in that region against the region length. This will catch * fields and field units that cannot possibly fit within the region. * * Note: Index fields do not directly reference an operation region, * thus they are not included in this check. */ if (Op == Op->Asl.Parent->Asl.Child) { /* * This is the first child of the field node, which is * the name of the region. Get the parse node for the * region -- which contains the length of the region. */ OwningOp = Node->Op; Op->Asl.Parent->Asl.ExtraValue = ACPI_MUL_8 ((UINT32) OwningOp->Asl.Value.Integer); /* Examine the field access width */ switch ((UINT8) Op->Asl.Parent->Asl.Value.Integer) { case AML_FIELD_ACCESS_ANY: case AML_FIELD_ACCESS_BYTE: case AML_FIELD_ACCESS_BUFFER: default: MinimumLength = 1; break; case AML_FIELD_ACCESS_WORD: MinimumLength = 2; break; case AML_FIELD_ACCESS_DWORD: MinimumLength = 4; break; case AML_FIELD_ACCESS_QWORD: MinimumLength = 8; break; } /* * Is the region at least as big as the access width? * Note: DataTableRegions have 0 length */ if (((UINT32) OwningOp->Asl.Value.Integer) && ((UINT32) OwningOp->Asl.Value.Integer < MinimumLength)) { AslError (ASL_ERROR, ASL_MSG_FIELD_ACCESS_WIDTH, Op, NULL); } /* * Check EC/CMOS/SMBUS fields to make sure that the correct * access type is used (BYTE for EC/CMOS, BUFFER for SMBUS) */ SpaceIdOp = OwningOp->Asl.Child->Asl.Next; switch ((UINT32) SpaceIdOp->Asl.Value.Integer) { case ACPI_ADR_SPACE_EC: case ACPI_ADR_SPACE_CMOS: case ACPI_ADR_SPACE_GPIO: if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != AML_FIELD_ACCESS_BYTE) { AslError (ASL_ERROR, ASL_MSG_REGION_BYTE_ACCESS, Op, NULL); } break; case ACPI_ADR_SPACE_SMBUS: case ACPI_ADR_SPACE_IPMI: case ACPI_ADR_SPACE_GSBUS: if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != AML_FIELD_ACCESS_BUFFER) { AslError (ASL_ERROR, ASL_MSG_REGION_BUFFER_ACCESS, Op, NULL); } break; default: /* Nothing to do for other address spaces */ break; } } else { /* * This is one element of the field list. Check to make sure * that it does not go beyond the end of the parent operation region. * * In the code below: * Op->Asl.Parent->Asl.ExtraValue - Region Length (bits) * Op->Asl.ExtraValue - Field start offset (bits) * Op->Asl.Child->Asl.Value.Integer32 - Field length (bits) * Op->Asl.Child->Asl.ExtraValue - Field access width (bits) */ if (Op->Asl.Parent->Asl.ExtraValue && Op->Asl.Child) { XfCheckFieldRange (Op, Op->Asl.Parent->Asl.ExtraValue, Op->Asl.ExtraValue, (UINT32) Op->Asl.Child->Asl.Value.Integer, Op->Asl.Child->Asl.ExtraValue); } } } /* 5) Check for a connection object */ #if 0 else if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONNECTION) { return_ACPI_STATUS (Status); } #endif Op->Asl.Node = Node; return_ACPI_STATUS (Status); }
acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg) { u64 address; u8 access_width; u32 bit_width; u8 bit_offset; u64 value64; u32 new_value32, old_value32; u8 index; acpi_status status; ACPI_FUNCTION_NAME(hw_write); /* Validate contents of the GAS register */ status = acpi_hw_validate_register(reg, 32, &address); if (ACPI_FAILURE(status)) { return (status); } /* Convert access_width into number of bits based */ access_width = acpi_hw_get_access_bit_width(reg, 32); bit_width = reg->bit_offset + reg->bit_width; bit_offset = reg->bit_offset; /* * Two address spaces supported: Memory or IO. PCI_Config is * not supported here because the GAS structure is insufficient */ index = 0; while (bit_width) { /* * Use offset style bit reads because "Index * AccessWidth" is * ensured to be less than 32-bits by acpi_hw_validate_register(). */ new_value32 = ACPI_GET_BITS(&value, index * access_width, ACPI_MASK_BITS_ABOVE_32 (access_width)); if (bit_offset >= access_width) { bit_offset -= access_width; } else { /* * Use offset style bit masks because access_width is ensured * to be less than 32-bits by acpi_hw_validate_register() and * bit_offset/bit_width is less than access_width here. */ if (bit_offset) { new_value32 &= ACPI_MASK_BITS_BELOW(bit_offset); } if (bit_width < access_width) { new_value32 &= ACPI_MASK_BITS_ABOVE(bit_width); } if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { if (bit_offset || bit_width < access_width) { /* * Read old values in order not to modify the bits that * are beyond the register bit_width/bit_offset setting. */ status = acpi_os_read_memory((acpi_physical_address) address + index * ACPI_DIV_8 (access_width), &value64, access_width); old_value32 = (u32)value64; /* * Use offset style bit masks because access_width is * ensured to be less than 32-bits by * acpi_hw_validate_register() and bit_offset/bit_width is * less than access_width here. */ if (bit_offset) { old_value32 &= ACPI_MASK_BITS_ABOVE (bit_offset); bit_offset = 0; } if (bit_width < access_width) { old_value32 &= ACPI_MASK_BITS_BELOW (bit_width); } new_value32 |= old_value32; } value64 = (u64)new_value32; status = acpi_os_write_memory((acpi_physical_address) address + index * ACPI_DIV_8 (access_width), value64, access_width); } else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ if (bit_offset || bit_width < access_width) { /* * Read old values in order not to modify the bits that * are beyond the register bit_width/bit_offset setting. */ status = acpi_hw_read_port((acpi_io_address) address + index * ACPI_DIV_8 (access_width), &old_value32, access_width); /* * Use offset style bit masks because access_width is * ensured to be less than 32-bits by * acpi_hw_validate_register() and bit_offset/bit_width is * less than access_width here. */ if (bit_offset) { old_value32 &= ACPI_MASK_BITS_ABOVE (bit_offset); bit_offset = 0; } if (bit_width < access_width) { old_value32 &= ACPI_MASK_BITS_BELOW (bit_width); } new_value32 |= old_value32; } status = acpi_hw_write_port((acpi_io_address) address + index * ACPI_DIV_8 (access_width), new_value32, access_width); } } /* * Index * access_width is ensured to be less than 32-bits by * acpi_hw_validate_register(). */ bit_width -= bit_width > access_width ? access_width : bit_width; index++; } ACPI_DEBUG_PRINT((ACPI_DB_IO, "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n", value, access_width, ACPI_FORMAT_UINT64(address), acpi_ut_get_region_name(reg->space_id))); return (status); }
acpi_status acpi_hw_write(u64 value, struct acpi_generic_address *reg) { u64 address; u8 access_width; u32 bit_width; u8 bit_offset; u64 value64; u8 index; acpi_status status; ACPI_FUNCTION_NAME(hw_write); /* Validate contents of the GAS register */ status = acpi_hw_validate_register(reg, 64, &address); if (ACPI_FAILURE(status)) { return (status); } /* Convert access_width into number of bits based */ access_width = acpi_hw_get_access_bit_width(address, reg, 64); bit_width = reg->bit_offset + reg->bit_width; bit_offset = reg->bit_offset; /* * Two address spaces supported: Memory or IO. PCI_Config is * not supported here because the GAS structure is insufficient */ index = 0; while (bit_width) { /* * Use offset style bit reads because "Index * AccessWidth" is * ensured to be less than 64-bits by acpi_hw_validate_register(). */ value64 = ACPI_GET_BITS(&value, index * access_width, ACPI_MASK_BITS_ABOVE_64(access_width)); if (bit_offset >= access_width) { bit_offset -= access_width; } else { if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { status = acpi_os_write_memory((acpi_physical_address) address + index * ACPI_DIV_8 (access_width), value64, access_width); } else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ status = acpi_hw_write_port((acpi_io_address) address + index * ACPI_DIV_8 (access_width), (u32)value64, access_width); } } /* * Index * access_width is ensured to be less than 32-bits by * acpi_hw_validate_register(). */ bit_width -= bit_width > access_width ? access_width : bit_width; index++; } ACPI_DEBUG_PRINT((ACPI_DB_IO, "Wrote: %8.8X%8.8X width %2d to %8.8X%8.8X (%s)\n", ACPI_FORMAT_UINT64(value), access_width, ACPI_FORMAT_UINT64(address), acpi_ut_get_region_name(reg->space_id))); return (status); }
static ACPI_STATUS AcpiHwValidateIoRequest ( ACPI_IO_ADDRESS Address, UINT32 BitWidth) { UINT32 i; UINT32 ByteWidth; ACPI_IO_ADDRESS LastAddress; const ACPI_PORT_INFO *PortInfo; ACPI_FUNCTION_TRACE (HwValidateIoRequest); /* Supported widths are 8/16/32 */ if ((BitWidth != 8) && (BitWidth != 16) && (BitWidth != 32)) { ACPI_ERROR ((AE_INFO, "Bad BitWidth parameter: %8.8X", BitWidth)); return (AE_BAD_PARAMETER); } PortInfo = AcpiProtectedPorts; ByteWidth = ACPI_DIV_8 (BitWidth); LastAddress = Address + ByteWidth - 1; ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Address %8.8X%8.8X LastAddress %8.8X%8.8X Length %X", ACPI_FORMAT_UINT64 (Address), ACPI_FORMAT_UINT64 (LastAddress), ByteWidth)); /* Maximum 16-bit address in I/O space */ if (LastAddress > ACPI_UINT16_MAX) { ACPI_ERROR ((AE_INFO, "Illegal I/O port address/length above 64K: %8.8X%8.8X/0x%X", ACPI_FORMAT_UINT64 (Address), ByteWidth)); return_ACPI_STATUS (AE_LIMIT); } /* Exit if requested address is not within the protected port table */ if (Address > AcpiProtectedPorts[ACPI_PORT_INFO_ENTRIES - 1].End) { return_ACPI_STATUS (AE_OK); } /* Check request against the list of protected I/O ports */ for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, PortInfo++) { /* * Check if the requested address range will write to a reserved * port. Four cases to consider: * * 1) Address range is contained completely in the port address range * 2) Address range overlaps port range at the port range start * 3) Address range overlaps port range at the port range end * 4) Address range completely encompasses the port range */ if ((Address <= PortInfo->End) && (LastAddress >= PortInfo->Start)) { /* Port illegality may depend on the _OSI calls made by the BIOS */ if (AcpiGbl_OsiData >= PortInfo->OsiDependency) { ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Denied AML access to port 0x%8.8X%8.8X/%X (%s 0x%.4X-0x%.4X)", ACPI_FORMAT_UINT64 (Address), ByteWidth, PortInfo->Name, PortInfo->Start, PortInfo->End)); return_ACPI_STATUS (AE_AML_ILLEGAL_ADDRESS); } } /* Finished if address range ends before the end of this port */ if (LastAddress <= PortInfo->End) { break; } } return_ACPI_STATUS (AE_OK); }
ACPI_STATUS AcpiHwWrite ( UINT32 Value, ACPI_GENERIC_ADDRESS *Reg) { UINT64 Address; UINT8 AccessWidth; UINT32 BitWidth; UINT8 BitOffset; UINT64 Value64; UINT32 NewValue32, OldValue32; UINT8 Index; ACPI_STATUS Status; ACPI_FUNCTION_NAME (HwWrite); /* Validate contents of the GAS register */ Status = AcpiHwValidateRegister (Reg, 32, &Address); if (ACPI_FAILURE (Status)) { return (Status); } /* Convert AccessWidth into number of bits based */ AccessWidth = Reg->AccessWidth ? Reg->AccessWidth : 1; AccessWidth = 1 << (AccessWidth + 2); BitWidth = ACPI_ROUND_UP (Reg->BitOffset + Reg->BitWidth, AccessWidth); BitOffset = Reg->BitOffset; /* * Two address spaces supported: Memory or IO. PCI_Config is * not supported here because the GAS structure is insufficient */ Index = 0; while (BitWidth) { NewValue32 = ACPI_GET_BITS (&Value, (Index * AccessWidth), ((1 << AccessWidth) - 1)); if (BitOffset > AccessWidth) { BitOffset -= AccessWidth; } else { if (BitOffset) { NewValue32 &= ACPI_MASK_BITS_BELOW (BitOffset); } if (BitWidth < AccessWidth) { NewValue32 &= ACPI_MASK_BITS_ABOVE (BitWidth); } if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY) { if (BitOffset || BitWidth < AccessWidth) { /* * Read old values in order not to modify the bits that * are beyond the register BitWidth/BitOffset setting. */ Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS) Address + Index * ACPI_DIV_8 (AccessWidth), &Value64, AccessWidth); OldValue32 = (UINT32) Value64; if (BitOffset) { OldValue32 &= ACPI_MASK_BITS_ABOVE (BitOffset + 1); BitOffset = 0; } if (BitWidth < AccessWidth) { OldValue32 &= ACPI_MASK_BITS_BELOW (BitWidth - 1); } NewValue32 |= OldValue32; } Value64 = (UINT64) NewValue32; Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS) Address + Index * ACPI_DIV_8 (AccessWidth), Value64, AccessWidth); } else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ { if (BitOffset || BitWidth < AccessWidth) { /* * Read old values in order not to modify the bits that * are beyond the register BitWidth/BitOffset setting. */ Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address + Index * ACPI_DIV_8 (AccessWidth), &OldValue32, AccessWidth); if (BitOffset) { OldValue32 &= ACPI_MASK_BITS_ABOVE (BitOffset + 1); BitOffset = 0; } if (BitWidth < AccessWidth) { OldValue32 &= ACPI_MASK_BITS_BELOW (BitWidth - 1); } NewValue32 |= OldValue32; } Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address + Index * ACPI_DIV_8 (AccessWidth), NewValue32, AccessWidth); } } BitWidth -= BitWidth > AccessWidth ? AccessWidth : BitWidth; Index++; } ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n", Value, AccessWidth, ACPI_FORMAT_UINT64 (Address), AcpiUtGetRegionName (Reg->SpaceId))); return (Status); }
ACPI_STATUS AcpiHwRead ( UINT32 *Value, ACPI_GENERIC_ADDRESS *Reg) { UINT64 Address; UINT8 AccessWidth; UINT32 BitWidth; UINT8 BitOffset; UINT64 Value64; UINT32 Value32; UINT8 Index; ACPI_STATUS Status; ACPI_FUNCTION_NAME (HwRead); /* Validate contents of the GAS register */ Status = AcpiHwValidateRegister (Reg, 32, &Address); if (ACPI_FAILURE (Status)) { return (Status); } /* * Initialize entire 32-bit return value to zero, convert AccessWidth * into number of bits based */ *Value = 0; AccessWidth = Reg->AccessWidth ? Reg->AccessWidth : 1; AccessWidth = 1 << (AccessWidth + 2); BitWidth = ACPI_ROUND_UP (Reg->BitOffset + Reg->BitWidth, AccessWidth); BitOffset = Reg->BitOffset; /* * Two address spaces supported: Memory or IO. PCI_Config is * not supported here because the GAS structure is insufficient */ Index = 0; while (BitWidth) { if (BitOffset > AccessWidth) { Value32 = 0; BitOffset -= AccessWidth; } else { if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY) { Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS) Address + Index * ACPI_DIV_8 (AccessWidth), &Value64, AccessWidth); Value32 = (UINT32) Value64; } else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ { Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address + Index * ACPI_DIV_8 (AccessWidth), &Value32, AccessWidth); } if (BitOffset) { Value32 &= ACPI_MASK_BITS_BELOW (BitOffset); BitOffset = 0; } if (BitWidth < AccessWidth) { Value32 &= ACPI_MASK_BITS_ABOVE (BitWidth); } } ACPI_SET_BITS (Value, Index * AccessWidth, ((1 << AccessWidth) - 1), Value32); BitWidth -= BitWidth > AccessWidth ? AccessWidth : BitWidth; Index++; } ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n", *Value, AccessWidth, ACPI_FORMAT_UINT64 (Address), AcpiUtGetRegionName (Reg->SpaceId))); return (Status); }
acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info) { union acpi_operand_object *obj_desc; union acpi_operand_object *second_desc = NULL; u32 type; acpi_status status; ACPI_FUNCTION_TRACE(ex_prep_field_value); /* Parameter validation */ if (info->field_type != ACPI_TYPE_LOCAL_INDEX_FIELD) { if (!info->region_node) { ACPI_ERROR((AE_INFO, "Null RegionNode")); return_ACPI_STATUS(AE_AML_NO_OPERAND); } type = acpi_ns_get_type(info->region_node); if (type != ACPI_TYPE_REGION) { ACPI_ERROR((AE_INFO, "Needed Region, found type 0x%X (%s)", type, acpi_ut_get_type_name(type))); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } } /* Allocate a new field object */ obj_desc = acpi_ut_create_internal_object(info->field_type); if (!obj_desc) { return_ACPI_STATUS(AE_NO_MEMORY); } /* Initialize areas of the object that are common to all fields */ obj_desc->common_field.node = info->field_node; status = acpi_ex_prep_common_field_object(obj_desc, info->field_flags, info->attribute, info->field_bit_position, info->field_bit_length); if (ACPI_FAILURE(status)) { acpi_ut_delete_object_desc(obj_desc); return_ACPI_STATUS(status); } /* Initialize areas of the object that are specific to the field type */ switch (info->field_type) { case ACPI_TYPE_LOCAL_REGION_FIELD: obj_desc->field.region_obj = acpi_ns_get_attached_object(info->region_node); /* An additional reference for the container */ acpi_ut_add_reference(obj_desc->field.region_obj); /* allow full data read from EC address space */ if (obj_desc->field.region_obj->region.space_id == ACPI_ADR_SPACE_EC) { if (obj_desc->common_field.bit_length > 8) { unsigned width = ACPI_ROUND_BITS_UP_TO_BYTES( obj_desc->common_field.bit_length); // access_bit_width is u8, don't overflow it if (width > 8) width = 8; obj_desc->common_field.access_byte_width = width; obj_desc->common_field.access_bit_width = 8 * width; } } ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "RegionField: BitOff %X, Off %X, Gran %X, Region %p\n", obj_desc->field.start_field_bit_offset, obj_desc->field.base_byte_offset, obj_desc->field.access_byte_width, obj_desc->field.region_obj)); break; case ACPI_TYPE_LOCAL_BANK_FIELD: obj_desc->bank_field.value = info->bank_value; obj_desc->bank_field.region_obj = acpi_ns_get_attached_object(info->region_node); obj_desc->bank_field.bank_obj = acpi_ns_get_attached_object(info->register_node); /* An additional reference for the attached objects */ acpi_ut_add_reference(obj_desc->bank_field.region_obj); acpi_ut_add_reference(obj_desc->bank_field.bank_obj); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Bank Field: BitOff %X, Off %X, Gran %X, Region %p, BankReg %p\n", obj_desc->bank_field.start_field_bit_offset, obj_desc->bank_field.base_byte_offset, obj_desc->field.access_byte_width, obj_desc->bank_field.region_obj, obj_desc->bank_field.bank_obj)); /* * Remember location in AML stream of the field unit * opcode and operands -- since the bank_value * operands must be evaluated. */ second_desc = obj_desc->common.next_object; second_desc->extra.aml_start = ACPI_CAST_PTR(union acpi_parse_object, info->data_register_node)->named.data; second_desc->extra.aml_length = ACPI_CAST_PTR(union acpi_parse_object, info->data_register_node)->named.length; break; case ACPI_TYPE_LOCAL_INDEX_FIELD: /* Get the Index and Data registers */ obj_desc->index_field.index_obj = acpi_ns_get_attached_object(info->register_node); obj_desc->index_field.data_obj = acpi_ns_get_attached_object(info->data_register_node); if (!obj_desc->index_field.data_obj || !obj_desc->index_field.index_obj) { ACPI_ERROR((AE_INFO, "Null Index Object during field prep")); acpi_ut_delete_object_desc(obj_desc); return_ACPI_STATUS(AE_AML_INTERNAL); } /* An additional reference for the attached objects */ acpi_ut_add_reference(obj_desc->index_field.data_obj); acpi_ut_add_reference(obj_desc->index_field.index_obj); /* * April 2006: Changed to match MS behavior * * The value written to the Index register is the byte offset of the * target field in units of the granularity of the index_field * * Previously, the value was calculated as an index in terms of the * width of the Data register, as below: * * obj_desc->index_field.Value = (u32) * (Info->field_bit_position / ACPI_MUL_8 ( * obj_desc->Field.access_byte_width)); * * February 2006: Tried value as a byte offset: * obj_desc->index_field.Value = (u32) * ACPI_DIV_8 (Info->field_bit_position); */ obj_desc->index_field.value = (u32) ACPI_ROUND_DOWN(ACPI_DIV_8(info->field_bit_position), obj_desc->index_field. access_byte_width); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "IndexField: BitOff %X, Off %X, Value %X, Gran %X, Index %p, Data %p\n", obj_desc->index_field.start_field_bit_offset, obj_desc->index_field.base_byte_offset, obj_desc->index_field.value, obj_desc->field.access_byte_width, obj_desc->index_field.index_obj, obj_desc->index_field.data_obj)); break; default: /* No other types should get here */ break; } /* * Store the constructed descriptor (obj_desc) into the parent Node, * preserving the current type of that named_obj. */ status = acpi_ns_attach_object(info->field_node, obj_desc, acpi_ns_get_type(info->field_node)); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Set NamedObj %p [%4.4s], ObjDesc %p\n", info->field_node, acpi_ut_get_node_name(info->field_node), obj_desc)); /* Remove local reference to the object */ acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status); }
acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg) { u64 address; u8 access_width; u32 bit_width; u8 bit_offset; u64 value64; u32 value32; u8 index; acpi_status status; ACPI_FUNCTION_NAME(hw_read); /* Validate contents of the GAS register */ status = acpi_hw_validate_register(reg, 32, &address); if (ACPI_FAILURE(status)) { return (status); } /* * Initialize entire 32-bit return value to zero, convert access_width * into number of bits based */ *value = 0; access_width = acpi_hw_get_access_bit_width(reg, 32); bit_width = reg->bit_offset + reg->bit_width; bit_offset = reg->bit_offset; /* * Two address spaces supported: Memory or IO. PCI_Config is * not supported here because the GAS structure is insufficient */ index = 0; while (bit_width) { if (bit_offset >= access_width) { value32 = 0; bit_offset -= access_width; } else { if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { status = acpi_os_read_memory((acpi_physical_address) address + index * ACPI_DIV_8 (access_width), &value64, access_width); value32 = (u32)value64; } else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ status = acpi_hw_read_port((acpi_io_address) address + index * ACPI_DIV_8 (access_width), &value32, access_width); } /* * Use offset style bit masks because: * bit_offset < access_width/bit_width < access_width, and * access_width is ensured to be less than 32-bits by * acpi_hw_validate_register(). */ if (bit_offset) { value32 &= ACPI_MASK_BITS_BELOW(bit_offset); bit_offset = 0; } if (bit_width < access_width) { value32 &= ACPI_MASK_BITS_ABOVE(bit_width); } } /* * Use offset style bit writes because "Index * AccessWidth" is * ensured to be less than 32-bits by acpi_hw_validate_register(). */ ACPI_SET_BITS(value, index * access_width, ACPI_MASK_BITS_ABOVE_32(access_width), value32); bit_width -= bit_width > access_width ? access_width : bit_width; index++; } ACPI_DEBUG_PRINT((ACPI_DB_IO, "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n", *value, access_width, ACPI_FORMAT_UINT64(address), acpi_ut_get_region_name(reg->space_id))); return (status); }
static u32 acpi_ex_generate_access(u32 field_bit_offset, u32 field_bit_length, u32 region_length) { u32 field_byte_length; u32 field_byte_offset; u32 field_byte_end_offset; u32 access_byte_width; u32 field_start_offset; u32 field_end_offset; u32 minimum_access_width = 0xFFFFFFFF; u32 minimum_accesses = 0xFFFFFFFF; u32 accesses; ACPI_FUNCTION_TRACE(ex_generate_access); /* Round Field start offset and length to "minimal" byte boundaries */ field_byte_offset = ACPI_DIV_8(ACPI_ROUND_DOWN(field_bit_offset, 8)); field_byte_end_offset = ACPI_DIV_8(ACPI_ROUND_UP(field_bit_length + field_bit_offset, 8)); field_byte_length = field_byte_end_offset - field_byte_offset; ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Bit length %u, Bit offset %u\n", field_bit_length, field_bit_offset)); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Byte Length %u, Byte Offset %u, End Offset %u\n", field_byte_length, field_byte_offset, field_byte_end_offset)); /* * Iterative search for the maximum access width that is both aligned * and does not go beyond the end of the region * * Start at byte_acc and work upwards to qword_acc max. (1,2,4,8 bytes) */ for (access_byte_width = 1; access_byte_width <= 8; access_byte_width <<= 1) { /* * 1) Round end offset up to next access boundary and make sure that * this does not go beyond the end of the parent region. * 2) When the Access width is greater than the field_byte_length, we * are done. (This does not optimize for the perfectly aligned * case yet). */ if (ACPI_ROUND_UP(field_byte_end_offset, access_byte_width) <= region_length) { field_start_offset = ACPI_ROUND_DOWN(field_byte_offset, access_byte_width) / access_byte_width; field_end_offset = ACPI_ROUND_UP((field_byte_length + field_byte_offset), access_byte_width) / access_byte_width; accesses = field_end_offset - field_start_offset; ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "AccessWidth %u end is within region\n", access_byte_width)); ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Field Start %u, Field End %u -- requires %u accesses\n", field_start_offset, field_end_offset, accesses)); /* Single access is optimal */ if (accesses <= 1) { ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Entire field can be accessed with one operation of size %u\n", access_byte_width)); return_VALUE(access_byte_width); } /* * Fits in the region, but requires more than one read/write. * try the next wider access on next iteration */ if (accesses < minimum_accesses) { minimum_accesses = accesses; minimum_access_width = access_byte_width; } } else { ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "AccessWidth %u end is NOT within region\n", access_byte_width)); if (access_byte_width == 1) { ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Field goes beyond end-of-region!\n")); /* Field does not fit in the region at all */ return_VALUE(0); } /* * This width goes beyond the end-of-region, back off to * previous access */ ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Backing off to previous optimal access width of %u\n", minimum_access_width)); return_VALUE(minimum_access_width); } } /* * Could not read/write field with one operation, * just use max access width */ ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, "Cannot access field in one operation, using width 8\n")); return_VALUE(8); }
static UINT32 AcpiExGenerateAccess ( UINT32 FieldBitOffset, UINT32 FieldBitLength, UINT32 RegionLength) { UINT32 FieldByteLength; UINT32 FieldByteOffset; UINT32 FieldByteEndOffset; UINT32 AccessByteWidth; UINT32 FieldStartOffset; UINT32 FieldEndOffset; UINT32 MinimumAccessWidth = 0xFFFFFFFF; UINT32 MinimumAccesses = 0xFFFFFFFF; UINT32 Accesses; ACPI_FUNCTION_TRACE (ExGenerateAccess); /* Round Field start offset and length to "minimal" byte boundaries */ FieldByteOffset = ACPI_DIV_8 (ACPI_ROUND_DOWN (FieldBitOffset, 8)); FieldByteEndOffset = ACPI_DIV_8 (ACPI_ROUND_UP (FieldBitLength + FieldBitOffset, 8)); FieldByteLength = FieldByteEndOffset - FieldByteOffset; ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Bit length %u, Bit offset %u\n", FieldBitLength, FieldBitOffset)); ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Byte Length %u, Byte Offset %u, End Offset %u\n", FieldByteLength, FieldByteOffset, FieldByteEndOffset)); /* * Iterative search for the maximum access width that is both aligned * and does not go beyond the end of the region * * Start at ByteAcc and work upwards to QwordAcc max. (1,2,4,8 bytes) */ for (AccessByteWidth = 1; AccessByteWidth <= 8; AccessByteWidth <<= 1) { /* * 1) Round end offset up to next access boundary and make sure that * this does not go beyond the end of the parent region. * 2) When the Access width is greater than the FieldByteLength, we * are done. (This does not optimize for the perfectly aligned * case yet). */ if (ACPI_ROUND_UP (FieldByteEndOffset, AccessByteWidth) <= RegionLength) { FieldStartOffset = ACPI_ROUND_DOWN (FieldByteOffset, AccessByteWidth) / AccessByteWidth; FieldEndOffset = ACPI_ROUND_UP ((FieldByteLength + FieldByteOffset), AccessByteWidth) / AccessByteWidth; Accesses = FieldEndOffset - FieldStartOffset; ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "AccessWidth %u end is within region\n", AccessByteWidth)); ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Field Start %u, Field End %u -- requires %u accesses\n", FieldStartOffset, FieldEndOffset, Accesses)); /* Single access is optimal */ if (Accesses <= 1) { ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Entire field can be accessed with one operation of size %u\n", AccessByteWidth)); return_VALUE (AccessByteWidth); } /* * Fits in the region, but requires more than one read/write. * try the next wider access on next iteration */ if (Accesses < MinimumAccesses) { MinimumAccesses = Accesses; MinimumAccessWidth = AccessByteWidth; } } else { ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "AccessWidth %u end is NOT within region\n", AccessByteWidth)); if (AccessByteWidth == 1) { ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Field goes beyond end-of-region!\n")); /* Field does not fit in the region at all */ return_VALUE (0); } /* * This width goes beyond the end-of-region, back off to * previous access */ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Backing off to previous optimal access width of %u\n", MinimumAccessWidth)); return_VALUE (MinimumAccessWidth); } } /* * Could not read/write field with one operation, * just use max access width */ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Cannot access field in one operation, using width 8\n")); return_VALUE (8); }
static acpi_status acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width) { u32 i; u32 byte_width; acpi_io_address last_address; const struct acpi_port_info *port_info; ACPI_FUNCTION_TRACE(hw_validate_io_request); /* Supported widths are 8/16/32 */ if ((bit_width != 8) && (bit_width != 16) && (bit_width != 32)) { ACPI_ERROR((AE_INFO, "Bad BitWidth parameter: %8.8X", bit_width)); return (AE_BAD_PARAMETER); } port_info = acpi_protected_ports; byte_width = ACPI_DIV_8(bit_width); last_address = address + byte_width - 1; ACPI_DEBUG_PRINT((ACPI_DB_IO, "Address %8.8X%8.8X LastAddress %8.8X%8.8X Length %X", ACPI_FORMAT_UINT64(address), ACPI_FORMAT_UINT64(last_address), byte_width)); /* Maximum 16-bit address in I/O space */ if (last_address > ACPI_UINT16_MAX) { ACPI_ERROR((AE_INFO, "Illegal I/O port address/length above 64K: %8.8X%8.8X/0x%X", ACPI_FORMAT_UINT64(address), byte_width)); return_ACPI_STATUS(AE_LIMIT); } /* Exit if requested address is not within the protected port table */ if (address > acpi_protected_ports[ACPI_PORT_INFO_ENTRIES - 1].end) { return_ACPI_STATUS(AE_OK); } /* Check request against the list of protected I/O ports */ for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, port_info++) { /* * Check if the requested address range will write to a reserved * port. Four cases to consider: * * 1) Address range is contained completely in the port address range * 2) Address range overlaps port range at the port range start * 3) Address range overlaps port range at the port range end * 4) Address range completely encompasses the port range */ if ((address <= port_info->end) && (last_address >= port_info->start)) { /* Port illegality may depend on the _OSI calls made by the BIOS */ if (acpi_gbl_osi_data >= port_info->osi_dependency) { ACPI_DEBUG_PRINT((ACPI_DB_IO, "Denied AML access to port 0x%8.8X%8.8X/%X (%s 0x%.4X-0x%.4X)", ACPI_FORMAT_UINT64(address), byte_width, port_info->name, port_info->start, port_info->end)); return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS); } } /* Finished if address range ends before the end of this port */ if (last_address <= port_info->end) { break; } } return_ACPI_STATUS(AE_OK); }
ACPI_STATUS AcpiHwWrite ( UINT64 Value, ACPI_GENERIC_ADDRESS *Reg) { UINT64 Address; UINT8 AccessWidth; UINT32 BitWidth; UINT8 BitOffset; UINT64 Value64; UINT8 Index; ACPI_STATUS Status; ACPI_FUNCTION_NAME (HwWrite); /* Validate contents of the GAS register */ Status = AcpiHwValidateRegister (Reg, 64, &Address); if (ACPI_FAILURE (Status)) { return (Status); } /* Convert AccessWidth into number of bits based */ AccessWidth = AcpiHwGetAccessBitWidth (Address, Reg, 64); BitWidth = Reg->BitOffset + Reg->BitWidth; BitOffset = Reg->BitOffset; /* * Two address spaces supported: Memory or IO. PCI_Config is * not supported here because the GAS structure is insufficient */ Index = 0; while (BitWidth) { /* * Use offset style bit reads because "Index * AccessWidth" is * ensured to be less than 64-bits by AcpiHwValidateRegister(). */ Value64 = ACPI_GET_BITS (&Value, Index * AccessWidth, ACPI_MASK_BITS_ABOVE_64 (AccessWidth)); if (BitOffset >= AccessWidth) { BitOffset -= AccessWidth; } else { if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY) { Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS) Address + Index * ACPI_DIV_8 (AccessWidth), Value64, AccessWidth); } else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */ { Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address + Index * ACPI_DIV_8 (AccessWidth), (UINT32) Value64, AccessWidth); } } /* * Index * AccessWidth is ensured to be less than 32-bits by * AcpiHwValidateRegister(). */ BitWidth -= BitWidth > AccessWidth ? AccessWidth : BitWidth; Index++; } ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Wrote: %8.8X%8.8X width %2d to %8.8X%8.8X (%s)\n", ACPI_FORMAT_UINT64 (Value), AccessWidth, ACPI_FORMAT_UINT64 (Address), AcpiUtGetRegionName (Reg->SpaceId))); return (Status); }