static ACPI_STATUS AcpiNsInitOneObject ( ACPI_HANDLE ObjHandle, UINT32 Level, void *Context, void **ReturnValue) { ACPI_OBJECT_TYPE Type; ACPI_STATUS Status = AE_OK; ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context; ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; ACPI_OPERAND_OBJECT *ObjDesc; ACPI_FUNCTION_NAME (NsInitOneObject); Info->ObjectCount++; /* And even then, we are only interested in a few object types */ Type = AcpiNsGetType (ObjHandle); ObjDesc = AcpiNsGetAttachedObject (Node); if (!ObjDesc) { return (AE_OK); } /* Increment counters for object types we are looking for */ switch (Type) { case ACPI_TYPE_REGION: Info->OpRegionCount++; break; case ACPI_TYPE_BUFFER_FIELD: Info->FieldCount++; break; case ACPI_TYPE_LOCAL_BANK_FIELD: Info->FieldCount++; break; case ACPI_TYPE_BUFFER: Info->BufferCount++; break; case ACPI_TYPE_PACKAGE: Info->PackageCount++; break; default: /* No init required, just exit now */ return (AE_OK); } /* If the object is already initialized, nothing else to do */ if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID) { return (AE_OK); } /* Must lock the interpreter before executing AML code */ AcpiExEnterInterpreter (); /* * Each of these types can contain executable AML code within the * declaration. */ switch (Type) { case ACPI_TYPE_REGION: Info->OpRegionInit++; Status = AcpiDsGetRegionArguments (ObjDesc); break; case ACPI_TYPE_BUFFER_FIELD: Info->FieldInit++; Status = AcpiDsGetBufferFieldArguments (ObjDesc); break; case ACPI_TYPE_LOCAL_BANK_FIELD: Info->FieldInit++; Status = AcpiDsGetBankFieldArguments (ObjDesc); break; case ACPI_TYPE_BUFFER: Info->BufferInit++; Status = AcpiDsGetBufferArguments (ObjDesc); break; case ACPI_TYPE_PACKAGE: Info->PackageInit++; Status = AcpiDsGetPackageArguments (ObjDesc); break; default: /* No other types can get here */ break; } if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "Could not execute arguments for [%4.4s] (%s)", AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type))); } /* * We ignore errors from above, and always return OK, since we don't want * to abort the walk on any single error. */ AcpiExExitInterpreter (); return (AE_OK); }
static ACPI_STATUS AcpiExFieldDatumIo ( ACPI_OPERAND_OBJECT *ObjDesc, UINT32 FieldDatumByteOffset, UINT64 *Value, UINT32 ReadWrite) { ACPI_STATUS Status; UINT64 LocalValue; ACPI_FUNCTION_TRACE_U32 (ExFieldDatumIo, FieldDatumByteOffset); if (ReadWrite == ACPI_READ) { if (!Value) { LocalValue = 0; /* To support reads without saving return value */ Value = &LocalValue; } /* Clear the entire return buffer first, [Very Important!] */ *Value = 0; } /* * The four types of fields are: * * BufferField - Read/write from/to a Buffer * RegionField - Read/write from/to a Operation Region. * BankField - Write to a Bank Register, then read/write from/to an * OperationRegion * IndexField - Write to an Index Register, then read/write from/to a * Data Register */ switch (ObjDesc->Common.Type) { case ACPI_TYPE_BUFFER_FIELD: /* * If the BufferField arguments have not been previously evaluated, * evaluate them now and save the results. */ if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) { Status = AcpiDsGetBufferFieldArguments (ObjDesc); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } if (ReadWrite == ACPI_READ) { /* * Copy the data from the source buffer. * Length is the field width in bytes. */ memcpy (Value, (ObjDesc->BufferField.BufferObj)->Buffer.Pointer + ObjDesc->BufferField.BaseByteOffset + FieldDatumByteOffset, ObjDesc->CommonField.AccessByteWidth); } else { /* * Copy the data to the target buffer. * Length is the field width in bytes. */ memcpy ((ObjDesc->BufferField.BufferObj)->Buffer.Pointer + ObjDesc->BufferField.BaseByteOffset + FieldDatumByteOffset, Value, ObjDesc->CommonField.AccessByteWidth); } Status = AE_OK; break; case ACPI_TYPE_LOCAL_BANK_FIELD: /* * Ensure that the BankValue is not beyond the capacity of * the register */ if (AcpiExRegisterOverflow (ObjDesc->BankField.BankObj, (UINT64) ObjDesc->BankField.Value)) { return_ACPI_STATUS (AE_AML_REGISTER_LIMIT); } /* * For BankFields, we must write the BankValue to the BankRegister * (itself a RegionField) before we can access the data. */ Status = AcpiExInsertIntoField (ObjDesc->BankField.BankObj, &ObjDesc->BankField.Value, sizeof (ObjDesc->BankField.Value)); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* * Now that the Bank has been selected, fall through to the * RegionField case and write the datum to the Operation Region */ /*lint -fallthrough */ case ACPI_TYPE_LOCAL_REGION_FIELD: /* * For simple RegionFields, we just directly access the owning * Operation Region. */ Status = AcpiExAccessRegion (ObjDesc, FieldDatumByteOffset, Value, ReadWrite); break; case ACPI_TYPE_LOCAL_INDEX_FIELD: /* * Ensure that the IndexValue is not beyond the capacity of * the register */ if (AcpiExRegisterOverflow (ObjDesc->IndexField.IndexObj, (UINT64) ObjDesc->IndexField.Value)) { return_ACPI_STATUS (AE_AML_REGISTER_LIMIT); } /* Write the index value to the IndexRegister (itself a RegionField) */ FieldDatumByteOffset += ObjDesc->IndexField.Value; ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Write to Index Register: Value %8.8X\n", FieldDatumByteOffset)); Status = AcpiExInsertIntoField (ObjDesc->IndexField.IndexObj, &FieldDatumByteOffset, sizeof (FieldDatumByteOffset)); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } if (ReadWrite == ACPI_READ) { /* Read the datum from the DataRegister */ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Read from Data Register\n")); Status = AcpiExExtractFromField (ObjDesc->IndexField.DataObj, Value, sizeof (UINT64)); } else { /* Write the datum to the DataRegister */ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Write to Data Register: Value %8.8X%8.8X\n", ACPI_FORMAT_UINT64 (*Value))); Status = AcpiExInsertIntoField (ObjDesc->IndexField.DataObj, Value, sizeof (UINT64)); } break; default: ACPI_ERROR ((AE_INFO, "Wrong object type in field I/O %u", ObjDesc->Common.Type)); Status = AE_AML_INTERNAL; break; } if (ACPI_SUCCESS (Status)) { if (ReadWrite == ACPI_READ) { ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Value Read %8.8X%8.8X, Width %u\n", ACPI_FORMAT_UINT64 (*Value), ObjDesc->CommonField.AccessByteWidth)); } else { ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Value Written %8.8X%8.8X, Width %u\n", ACPI_FORMAT_UINT64 (*Value), ObjDesc->CommonField.AccessByteWidth)); } } return_ACPI_STATUS (Status); }
ACPI_STATUS AcpiExGetBufferFieldValue ( ACPI_OPERAND_OBJECT *ObjDesc, ACPI_OPERAND_OBJECT *ResultDesc) { ACPI_STATUS Status; UINT32 Mask; UINT8 *Location; FUNCTION_TRACE ("ExGetBufferFieldValue"); /* * Parameter validation */ if (!ObjDesc) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null field pointer\n")); return_ACPI_STATUS (AE_AML_NO_OPERAND); } if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) { Status = AcpiDsGetBufferFieldArguments (ObjDesc); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } if (!ObjDesc->BufferField.BufferObj) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null container pointer\n")); return_ACPI_STATUS (AE_AML_INTERNAL); } if (ACPI_TYPE_BUFFER != ObjDesc->BufferField.BufferObj->Common.Type) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - container is not a Buffer\n")); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } if (!ResultDesc) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null result pointer\n")); return_ACPI_STATUS (AE_AML_INTERNAL); } /* Field location is (base of buffer) + (byte offset) */ Location = ObjDesc->BufferField.BufferObj->Buffer.Pointer + ObjDesc->BufferField.BaseByteOffset; /* * Construct Mask with as many 1 bits as the field width * * NOTE: Only the bottom 5 bits are valid for a shift operation, so * special care must be taken for any shift greater than 31 bits. * * TBD: [Unhandled] Fields greater than 32 bits will not work. */ if (ObjDesc->BufferField.BitLength < 32) { Mask = ((UINT32) 1 << ObjDesc->BufferField.BitLength) - (UINT32) 1; } else { Mask = ACPI_UINT32_MAX; } ResultDesc->Integer.Type = (UINT8) ACPI_TYPE_INTEGER; /* Get the 32 bit value at the location */ MOVE_UNALIGNED32_TO_32 (&ResultDesc->Integer.Value, Location); /* * Shift the 32-bit word containing the field, and mask off the * resulting value */ ResultDesc->Integer.Value = (ResultDesc->Integer.Value >> ObjDesc->BufferField.StartFieldBitOffset) & Mask; ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "** Read from buffer %p byte %ld bit %d width %d addr %p mask %08lx val %08lx\n", ObjDesc->BufferField.BufferObj->Buffer.Pointer, ObjDesc->BufferField.BaseByteOffset, ObjDesc->BufferField.StartFieldBitOffset, ObjDesc->BufferField.BitLength, Location, Mask, ResultDesc->Integer.Value)); return_ACPI_STATUS (AE_OK); }
ACPI_STATUS AcpiExReadDataFromField ( ACPI_WALK_STATE *WalkState, ACPI_OPERAND_OBJECT *ObjDesc, ACPI_OPERAND_OBJECT **RetBufferDesc) { ACPI_STATUS Status; ACPI_OPERAND_OBJECT *BufferDesc; ACPI_SIZE Length; void *Buffer; UINT32 Function; ACPI_FUNCTION_TRACE_PTR (ExReadDataFromField, ObjDesc); /* Parameter validation */ if (!ObjDesc) { return_ACPI_STATUS (AE_AML_NO_OPERAND); } if (!RetBufferDesc) { return_ACPI_STATUS (AE_BAD_PARAMETER); } if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD) { /* * If the BufferField arguments have not been previously evaluated, * evaluate them now and save the results. */ if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) { Status = AcpiDsGetBufferFieldArguments (ObjDesc); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } } else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS || ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS || ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI)) { /* * This is an SMBus, GSBus or IPMI read. We must create a buffer to hold * the data and then directly access the region handler. * * Note: SMBus and GSBus protocol value is passed in upper 16-bits of Function */ if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS) { Length = ACPI_SMBUS_BUFFER_SIZE; Function = ACPI_READ | (ObjDesc->Field.Attribute << 16); } else if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS) { Length = ACPI_GSBUS_BUFFER_SIZE; Function = ACPI_READ | (ObjDesc->Field.Attribute << 16); } else /* IPMI */ { Length = ACPI_IPMI_BUFFER_SIZE; Function = ACPI_READ; } BufferDesc = AcpiUtCreateBufferObject (Length); if (!BufferDesc) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* Call the region handler for the read */ Status = AcpiExAccessRegion (ObjDesc, 0, ACPI_CAST_PTR (UINT64, BufferDesc->Buffer.Pointer), Function); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); goto Exit; } /* * Allocate a buffer for the contents of the field. * * If the field is larger than the current integer width, create * a BUFFER to hold it. Otherwise, use an INTEGER. This allows * the use of arithmetic operators on the returned value if the * field size is equal or smaller than an Integer. * * Note: Field.length is in bits. */ Length = (ACPI_SIZE) ACPI_ROUND_BITS_UP_TO_BYTES (ObjDesc->Field.BitLength); if (Length > AcpiGbl_IntegerByteWidth) { /* Field is too large for an Integer, create a Buffer instead */ BufferDesc = AcpiUtCreateBufferObject (Length); if (!BufferDesc) { return_ACPI_STATUS (AE_NO_MEMORY); } Buffer = BufferDesc->Buffer.Pointer; } else { /* Field will fit within an Integer (normal case) */ BufferDesc = AcpiUtCreateIntegerObject ((UINT64) 0); if (!BufferDesc) { return_ACPI_STATUS (AE_NO_MEMORY); } Length = AcpiGbl_IntegerByteWidth; Buffer = &BufferDesc->Integer.Value; } ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "FieldRead [TO]: Obj %p, Type %X, Buf %p, ByteLen %X\n", ObjDesc, ObjDesc->Common.Type, Buffer, (UINT32) Length)); ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "FieldRead [FROM]: BitLen %X, BitOff %X, ByteOff %X\n", ObjDesc->CommonField.BitLength, ObjDesc->CommonField.StartFieldBitOffset, ObjDesc->CommonField.BaseByteOffset)); /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* Read from the field */ Status = AcpiExExtractFromField (ObjDesc, Buffer, (UINT32) Length); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); Exit: if (ACPI_FAILURE (Status)) { AcpiUtRemoveReference (BufferDesc); } else { *RetBufferDesc = BufferDesc; } return_ACPI_STATUS (Status); }
ACPI_STATUS AcpiExWriteDataToField ( ACPI_OPERAND_OBJECT *SourceDesc, ACPI_OPERAND_OBJECT *ObjDesc, ACPI_OPERAND_OBJECT **ResultDesc) { ACPI_STATUS Status; UINT32 Length; void *Buffer; ACPI_OPERAND_OBJECT *BufferDesc; UINT32 Function; ACPI_FUNCTION_TRACE_PTR (ExWriteDataToField, ObjDesc); /* Parameter validation */ if (!SourceDesc || !ObjDesc) { return_ACPI_STATUS (AE_AML_NO_OPERAND); } if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD) { /* * If the BufferField arguments have not been previously evaluated, * evaluate them now and save the results. */ if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) { Status = AcpiDsGetBufferFieldArguments (ObjDesc); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } } else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS || ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS || ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI)) { /* * This is an SMBus, GSBus or IPMI write. We will bypass the entire field * mechanism and handoff the buffer directly to the handler. For * these address spaces, the buffer is bi-directional; on a write, * return data is returned in the same buffer. * * Source must be a buffer of sufficient size: * ACPI_SMBUS_BUFFER_SIZE, ACPI_GSBUS_BUFFER_SIZE, or ACPI_IPMI_BUFFER_SIZE. * * Note: SMBus and GSBus protocol type is passed in upper 16-bits of Function */ if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER) { ACPI_ERROR ((AE_INFO, "SMBus/IPMI/GenericSerialBus write requires Buffer, found type %s", AcpiUtGetObjectTypeName (SourceDesc))); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS) { Length = ACPI_SMBUS_BUFFER_SIZE; Function = ACPI_WRITE | (ObjDesc->Field.Attribute << 16); } else if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS) { Length = ACPI_GSBUS_BUFFER_SIZE; Function = ACPI_WRITE | (ObjDesc->Field.Attribute << 16); } else /* IPMI */ { Length = ACPI_IPMI_BUFFER_SIZE; Function = ACPI_WRITE; } if (SourceDesc->Buffer.Length < Length) { ACPI_ERROR ((AE_INFO, "SMBus/IPMI/GenericSerialBus write requires Buffer of length %u, found length %u", Length, SourceDesc->Buffer.Length)); return_ACPI_STATUS (AE_AML_BUFFER_LIMIT); } /* Create the bi-directional buffer */ BufferDesc = AcpiUtCreateBufferObject (Length); if (!BufferDesc) { return_ACPI_STATUS (AE_NO_MEMORY); } Buffer = BufferDesc->Buffer.Pointer; ACPI_MEMCPY (Buffer, SourceDesc->Buffer.Pointer, Length); /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* * Perform the write (returns status and perhaps data in the * same buffer) */ Status = AcpiExAccessRegion (ObjDesc, 0, (UINT64 *) Buffer, Function); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); *ResultDesc = BufferDesc; return_ACPI_STATUS (Status); } /* Get a pointer to the data to be written */ switch (SourceDesc->Common.Type) { case ACPI_TYPE_INTEGER: Buffer = &SourceDesc->Integer.Value; Length = sizeof (SourceDesc->Integer.Value); break; case ACPI_TYPE_BUFFER: Buffer = SourceDesc->Buffer.Pointer; Length = SourceDesc->Buffer.Length; break; case ACPI_TYPE_STRING: Buffer = SourceDesc->String.Pointer; Length = SourceDesc->String.Length; break; default: return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n", SourceDesc, AcpiUtGetTypeName (SourceDesc->Common.Type), SourceDesc->Common.Type, Buffer, Length)); ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n", ObjDesc, AcpiUtGetTypeName (ObjDesc->Common.Type), ObjDesc->Common.Type, ObjDesc->CommonField.BitLength, ObjDesc->CommonField.StartFieldBitOffset, ObjDesc->CommonField.BaseByteOffset)); /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* Write to the field */ Status = AcpiExInsertIntoField (ObjDesc, Buffer, Length); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); return_ACPI_STATUS (Status); }
ACPI_STATUS AcpiExWriteDataToField ( ACPI_OPERAND_OBJECT *SourceDesc, ACPI_OPERAND_OBJECT *ObjDesc, ACPI_OPERAND_OBJECT **ResultDesc) { ACPI_STATUS Status; UINT32 Length; void *Buffer; ACPI_OPERAND_OBJECT *BufferDesc; UINT32 Function; UINT16 AccessorType; ACPI_FUNCTION_TRACE_PTR (ExWriteDataToField, ObjDesc); /* Parameter validation */ if (!SourceDesc || !ObjDesc) { return_ACPI_STATUS (AE_AML_NO_OPERAND); } if (ObjDesc->Common.Type == ACPI_TYPE_BUFFER_FIELD) { /* * If the BufferField arguments have not been previously evaluated, * evaluate them now and save the results. */ if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) { Status = AcpiDsGetBufferFieldArguments (ObjDesc); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } } else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS || ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS || ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_IPMI)) { /* * This is an SMBus, GSBus or IPMI write. We will bypass the entire * field mechanism and handoff the buffer directly to the handler. * For these address spaces, the buffer is bi-directional; on a * write, return data is returned in the same buffer. * * Source must be a buffer of sufficient size: * ACPI_SMBUS_BUFFER_SIZE, ACPI_GSBUS_BUFFER_SIZE, or * ACPI_IPMI_BUFFER_SIZE. * * Note: SMBus and GSBus protocol type is passed in upper 16-bits * of Function */ if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER) { ACPI_ERROR ((AE_INFO, "SMBus/IPMI/GenericSerialBus write requires " "Buffer, found type %s", AcpiUtGetObjectTypeName (SourceDesc))); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS) { Length = ACPI_SMBUS_BUFFER_SIZE; Function = ACPI_WRITE | (ObjDesc->Field.Attribute << 16); } else if (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS) { AccessorType = ObjDesc->Field.Attribute; Length = AcpiExGetSerialAccessLength ( AccessorType, ObjDesc->Field.AccessLength); /* * Add additional 2 bytes for the GenericSerialBus data buffer: * * Status; (Byte 0 of the data buffer) * Length; (Byte 1 of the data buffer) * Data[x-1]: (Bytes 2-x of the arbitrary length data buffer) */ Length += 2; Function = ACPI_WRITE | (AccessorType << 16); } else /* IPMI */ { Length = ACPI_IPMI_BUFFER_SIZE; Function = ACPI_WRITE; } if (SourceDesc->Buffer.Length < Length) { ACPI_ERROR ((AE_INFO, "SMBus/IPMI/GenericSerialBus write requires " "Buffer of length %u, found length %u", Length, SourceDesc->Buffer.Length)); return_ACPI_STATUS (AE_AML_BUFFER_LIMIT); } /* Create the bi-directional buffer */ BufferDesc = AcpiUtCreateBufferObject (Length); if (!BufferDesc) { return_ACPI_STATUS (AE_NO_MEMORY); } Buffer = BufferDesc->Buffer.Pointer; memcpy (Buffer, SourceDesc->Buffer.Pointer, Length); /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* * Perform the write (returns status and perhaps data in the * same buffer) */ Status = AcpiExAccessRegion ( ObjDesc, 0, (UINT64 *) Buffer, Function); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); *ResultDesc = BufferDesc; return_ACPI_STATUS (Status); } else if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REGION_FIELD) && (ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GPIO)) { /* * For GPIO (GeneralPurposeIo), we will bypass the entire field * mechanism and handoff the bit address and bit width directly to * the handler. The Address will be the bit offset * from the previous Connection() operator, making it effectively a * pin number index. The BitLength is the length of the field, which * is thus the number of pins. */ if (SourceDesc->Common.Type != ACPI_TYPE_INTEGER) { return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "GPIO FieldWrite [FROM]: (%s:%X), Val %.8X [TO]: Pin %u Bits %u\n", AcpiUtGetTypeName (SourceDesc->Common.Type), SourceDesc->Common.Type, (UINT32) SourceDesc->Integer.Value, ObjDesc->Field.PinNumberIndex, ObjDesc->Field.BitLength)); Buffer = &SourceDesc->Integer.Value; /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* Perform the write */ Status = AcpiExAccessRegion ( ObjDesc, 0, (UINT64 *) Buffer, ACPI_WRITE); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); return_ACPI_STATUS (Status); } /* Get a pointer to the data to be written */ switch (SourceDesc->Common.Type) { case ACPI_TYPE_INTEGER: Buffer = &SourceDesc->Integer.Value; Length = sizeof (SourceDesc->Integer.Value); break; case ACPI_TYPE_BUFFER: Buffer = SourceDesc->Buffer.Pointer; Length = SourceDesc->Buffer.Length; break; case ACPI_TYPE_STRING: Buffer = SourceDesc->String.Pointer; Length = SourceDesc->String.Length; break; default: return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n", SourceDesc, AcpiUtGetTypeName (SourceDesc->Common.Type), SourceDesc->Common.Type, Buffer, Length)); ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n", ObjDesc, AcpiUtGetTypeName (ObjDesc->Common.Type), ObjDesc->Common.Type, ObjDesc->CommonField.BitLength, ObjDesc->CommonField.StartFieldBitOffset, ObjDesc->CommonField.BaseByteOffset)); /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* Write to the field */ Status = AcpiExInsertIntoField (ObjDesc, Buffer, Length); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); return_ACPI_STATUS (Status); }