[mirror_edk2.git] / IntelFrameworkModulePkg / Include / Protocol / IsaIo.h

/** @file\r
  ISA I/O Protocol is used by ISA device drivers to perform I/O, MMIO and DMA \r
  operations on the ISA controllers they manage.\r
  \r
Copyright (c) 2006 - 2010, Intel Corporation.  All rights reserved<BR>\r
This program and the accompanying materials are licensed and made available under \r
the terms and conditions of the BSD License that accompanies this distribution.  \r
The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php.                                          \r
    \r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#ifndef _EFI_ISA_IO_H_\r
#define _EFI_ISA_IO_H_\r
\r
#include <Protocol/IsaAcpi.h>\r
\r
///\r
/// Global ID for the EFI_ISA_IO_PROTOCOL\r
///\r
#define EFI_ISA_IO_PROTOCOL_GUID \\r
  { \\r
    0x7ee2bd44, 0x3da0, 0x11d4, { 0x9a, 0x38, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } \\r
  }\r
\r
///\r
/// Forward declaration for the EFI_ISA_IO_PROTOCOL.\r
///\r
typedef struct _EFI_ISA_IO_PROTOCOL EFI_ISA_IO_PROTOCOL;\r
\r
///\r
/// Width of EFI_ISA_IO_PROTOCOL I/O Port and MMIO operations.\r
///\r
typedef enum {\r
  EfiIsaIoWidthUint8 = 0,      ///< 8-bit operation.\r
  EfiIsaIoWidthUint16,         ///< 16-bit operation.\r
  EfiIsaIoWidthUint32,         ///< 32-bit operation\r
  EfiIsaIoWidthReserved,\r
  EfiIsaIoWidthFifoUint8,      ///< 8-bit FIFO operation.\r
  EfiIsaIoWidthFifoUint16,     ///< 16-bit FIFO operation.\r
  EfiIsaIoWidthFifoUint32,     ///< 32-bit FIFO operation.\r
  EfiIsaIoWidthFifoReserved,\r
  EfiIsaIoWidthFillUint8,      ///< 8-bit Fill operation.\r
  EfiIsaIoWidthFillUint16,     ///< 16-bit Fill operation.\r
  EfiIsaIoWidthFillUint32,     ///< 32-bit Fill operation.\r
  EfiIsaIoWidthFillReserved,\r
  EfiIsaIoWidthMaximum\r
} EFI_ISA_IO_PROTOCOL_WIDTH;\r
\r
///\r
/// Attributes for the EFI_ISA_IO_PROTOCOL common DMA buffer allocations.\r
///\r
#define EFI_ISA_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE  0x080    ///< Map a memory range so write are combined.\r
#define EFI_ISA_IO_ATTRIBUTE_MEMORY_CACHED         0x800    ///< Map a memory range so all read and write accesses are cached.\r
#define EFI_ISA_IO_ATTRIBUTE_MEMORY_DISABLE        0x1000   ///< Disable a memory range.\r
\r
///\r
/// Channel attribute for EFI_ISA_IO_PROTOCOL slave DMA requests\r
///\r
#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_COMPATIBLE  0x001   ///< Set the speed of the DMA transfer in compatible mode.\r
#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_A           0x002   ///< Not supported.\r
#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_B           0x004   ///< Not supported.\r
#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_C           0x008   ///< Not supported.\r
#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8           0x010   ///< Request 8-bit DMA transfers.  Only available on channels 0..3.\r
#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16          0x020   ///< Request 16-bit DMA transfers.  Only available on channels 4..7.\r
#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE       0x040   ///< Request a single DMA transfer.\r
#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE       0x080   ///< Request multiple DMA transfers until TC (Terminal Count) or EOP (End of Process).\r
#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_AUTO_INITIALIZE   0x100   ///< Automatically reload base and count at the end of the DMA transfer.\r
\r
///\r
/// The DMA opreration type for EFI_ISA_IO_PROTOCOL DMA requests.\r
///\r
typedef enum {\r
  ///\r
  /// A read operation from system memory by a bus master.\r
  ///\r
  EfiIsaIoOperationBusMasterRead,\r
  ///\r
  /// A write operation to system memory by a bus master.\r
  ///\r
  EfiIsaIoOperationBusMasterWrite,\r
  ///\r
  /// Provides both read and write access to system memory by both the processor\r
  /// and a bus master. The buffer is coherent from both the processor's and the \r
  /// bus master's point of view.\r
  ///\r
  EfiIsaIoOperationBusMasterCommonBuffer,\r
  ///\r
  /// A read operation from system memory by a slave device.\r
  ///\r
  EfiIsaIoOperationSlaveRead,\r
  ///\r
  /// A write operation to system memory by a slave master.\r
  ///\r
  EfiIsaIoOperationSlaveWrite,\r
  EfiIsaIoOperationMaximum\r
} EFI_ISA_IO_PROTOCOL_OPERATION;\r
\r
/**\r
  Performs ISA I/O and MMIO Read/Write Cycles\r
\r
  @param[in]      This     A pointer to the EFI_ISA_IO_PROTOCOL instance.  \r
  @param[in]      Width    Specifies the width of the I/O or MMIO operation.\r
  @param[in]      Offset   The offset into the ISA I/O or MMIO space to start the \r
                           operation.  \r
  @param[in]      Count    The number of I/O or MMIO operations to perform.\r
  @param[in, out] Buffer   For read operations, the destination buffer to store \r
                           the results. For write operations, the source buffer to \r
                           write data from. \r
                                 \r
  @retval EFI_SUCCESS             The data was successfully read from or written to the device.\r
  @retval EFI_UNSUPPORTED         The Offset is not valid for this device.\r
  @retval EFI_INVALID_PARAMETER   Width or Count, or both, were invalid.\r
  @retval EFI_OUT_OF_RESOURCES    The request could not be completed due to a lack of resources.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ISA_IO_PROTOCOL_IO_MEM)(\r
  IN     EFI_ISA_IO_PROTOCOL        *This,\r
  IN     EFI_ISA_IO_PROTOCOL_WIDTH  Width,\r
  IN     UINT32                     Offset,\r
  IN     UINTN                      Count,\r
  IN OUT VOID                       *Buffer\r
  );\r
\r
///\r
/// Structure of functions for accessing ISA I/O and MMIO space.\r
///\r
typedef struct {\r
  ///\r
  /// Read from ISA I/O or MMIO space.\r
  ///\r
  EFI_ISA_IO_PROTOCOL_IO_MEM  Read;\r
  ///\r
  /// Write to ISA I/O or MMIO space.\r
  ///\r
  EFI_ISA_IO_PROTOCOL_IO_MEM  Write;\r
} EFI_ISA_IO_PROTOCOL_ACCESS;\r
\r
/**\r
  Copies data from one region of ISA MMIO space to another region of ISA\r
  MMIO space.\r
\r
  @param[in] This         A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
  @param[in] Width        Specifies the width of the MMIO copy operation.\r
  @param[in] DestOffset   The offset of the destination in ISA MMIO space.\r
  @param[in] SrcOffset    The offset of the source in ISA MMIO space.\r
  @param[in] Count        The number tranfers to perform for this copy operation.\r
\r
  @retval EFI_SUCCESS             The data was copied sucessfully.\r
  @retval EFI_UNSUPPORTED         The DestOffset or SrcOffset is not valid for this device.\r
  @retval EFI_INVALID_PARAMETER   Width or Count, or both, were invalid.\r
  @retval EFI_OUT_OF_RESOURCES    The request could not be completed due to a lack of resources.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ISA_IO_PROTOCOL_COPY_MEM)(\r
  IN EFI_ISA_IO_PROTOCOL         *This,\r
  IN EFI_ISA_IO_PROTOCOL_WIDTH   Width,\r
  IN UINT32                      DestOffset,\r
  IN UINT32                      SrcOffset,\r
  IN UINTN                       Count\r
  );\r
\r
/**\r
  Maps a memory region for DMA.\r
\r
  This function returns the device-specific addresses required to access system memory.\r
  This function is used to map system memory for ISA DMA operations.  All ISA DMA \r
  operations must be performed through their mapped addresses, and such mappings must \r
  be freed with EFI_ISA_IO_PROTOCOL.Unmap() after the DMA operation is completed.\r
    \r
  If the DMA operation is a single read or write data transfer through an ISA bus \r
  master, then EfiIsaIoOperationBusMasterRead or EfiIsaIoOperationBusMasterWrite \r
  is used and the range is unmapped to complete the operation. If the DMA operation\r
  is a single read or write data transfer through an ISA slave controller, then \r
  EfiIsaIoOperationSlaveRead or EfiIsaIoOperationSlaveWrite is used and the range \r
  is unmapped to complete the operation.  \r
  \r
  If performing a DMA read operation, all the data must be present in system memory before the Map() is performed.  Similarly, \r
  if performing a DMA write operation, the data must not be accessed in system \r
  memory until EFI_ISA_IO_PROTOCOL.Unmap() is performed.  Bus master operations that \r
  require both read and write access or require multiple host device interactions \r
  within the same mapped region must use EfiIsaIoOperationBusMasterCommonBuffer.  \r
  However, only memory allocated via the EFI_ISA_IO_PROTOCOL.AllocateBuffer() interface \r
  is guaranteed to be able to be mapped for this operation type.  In all mapping \r
  requests the NumberOfBytes returned may be less than originally requested.  It is\r
  the caller's responsibility to make additional requests to complete the entire\r
  transfer.\r
\r
  @param[in]      This                A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
  @param[in]      Operation           Indicates the type of DMA (slave or bus master), \r
                                      and if the DMA operation is going to read or \r
                                      write to system memory. \r
  @param[in]      ChannelNumber       The slave channel number to use for this DMA \r
                                      operation.  If Operation and ChannelAttributes \r
                                      shows that this device performs bus mastering \r
                                      DMA, then this field is ignored.  The legal \r
                                      range for this field is 0..7.\r
  @param[in]      ChannelAttributes   A bitmask of the attributes used to configure\r
                                      the slave DMA channel for this DMA operation.  \r
                                      See EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_* for the\r
                                      legal bit combinations.\r
  @param[in]      HostAddress         The system memory address to map to the device.\r
  @param[in, out] NumberOfBytes       On input the number of bytes to map.  On \r
                                      output the number of bytes that were mapped.\r
  @param[out]     DeviceAddress       The resulting map address for the bus master \r
                                      device to use to access the hosts HostAddress.  \r
  @param[out]     Mapping             A returned value that must be passed to into\r
                                      EFI_ISA_IO_PROTOCOL.Unmap() to free all the the \r
                                      resources associated with this map request.\r
\r
  @retval EFI_SUCCESS             The range was mapped for the returned NumberOfBytes.\r
  @retval EFI_INVALID_PARAMETER   The Operation is undefined.\r
  @retval EFI_INVALID_PARAMETER   The HostAddress is undefined.\r
  @retval EFI_UNSUPPORTED         The HostAddress can not be mapped as a common buffer.\r
  @retval EFI_DEVICE_ERROR        The system hardware could not map the requested address.\r
  @retval EFI_OUT_OF_RESOURCES    The memory pages could not be allocated.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ISA_IO_PROTOCOL_MAP)(\r
  IN     EFI_ISA_IO_PROTOCOL            *This,\r
  IN     EFI_ISA_IO_PROTOCOL_OPERATION  Operation,\r
  IN     UINT8                          ChannelNumber      OPTIONAL,\r
  IN     UINT32                         ChannelAttributes,\r
  IN     VOID                           *HostAddress,\r
  IN OUT UINTN                          *NumberOfBytes,\r
  OUT    EFI_PHYSICAL_ADDRESS           *DeviceAddress,\r
  OUT    VOID                           **Mapping\r
  );\r
\r
/**\r
  Unmaps a memory region that was previously mapped with EFI_ISA_IO_PROTOCOL.Map().\r
\r
  The EFI_ISA_IO_PROTOCOL.Map() operation is completed and any corresponding \r
  resources are released.  If the operation was EfiIsaIoOperationSlaveWrite \r
  or EfiIsaIoOperationBusMasterWrite, the data is committed to system memory.  \r
  Any resources used for the mapping are freed.\r
\r
  @param[in] This           A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
  @param[in] Mapping        The mapping value returned from EFI_ISA_IO_PROTOCOL.Map().\r
\r
  @retval EFI_SUCCESS       The memory region was unmapped.\r
  @retval EFI_DEVICE_ERROR  The data was not committed to the target system memory.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ISA_IO_PROTOCOL_UNMAP)(\r
  IN  EFI_ISA_IO_PROTOCOL  *This,\r
  IN  VOID                 *Mapping\r
  );\r
\r
/**\r
  Allocates pages that are suitable for an EfiIsaIoOperationBusMasterCommonBuffer\r
  mapping.                                                                       \r
\r
  @param[in]  This          A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
  @param[in]  Type          The type allocation to perform. \r
  @param[in]  MemoryType    The type of memory to allocate.\r
  @param[in]  Pages         The number of pages to allocate.\r
  @param[out] HostAddress   A pointer to store the base address of the allocated range.\r
  @param[in]  Attributes    The requested bit mask of attributes for the allocated range.\r
\r
  @retval EFI_SUCCESS             The requested memory pages were allocated.\r
  @retval EFI_INVALID_PARAMETER   Type is invalid.\r
  @retval EFI_INVALID_PARAMETER   MemoryType is invalid.\r
  @retval EFI_INVALID_PARAMETER   HostAddress is NULL.\r
  @retval EFI_UNSUPPORTED         Attributes is unsupported.\r
  @retval EFI_UNSUPPORTED         The memory range specified by HostAddress, Pages,\r
                                  and Type is not available for common buffer use.\r
  @retval EFI_OUT_OF_RESOURCES    The memory pages could not be allocated.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ISA_IO_PROTOCOL_ALLOCATE_BUFFER)(\r
  IN  EFI_ISA_IO_PROTOCOL  *This,\r
  IN  EFI_ALLOCATE_TYPE    Type,\r
  IN  EFI_MEMORY_TYPE      MemoryType,\r
  IN  UINTN                Pages,\r
  OUT VOID                 **HostAddress,\r
  IN  UINT64               Attributes\r
  );\r
\r
/**\r
  Frees a common buffer that was allocated with EFI_ISA_IO_PROTOCOL.AllocateBuffer().\r
\r
  @param[in] This          A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
  @param[in] Pages         The number of pages to free from the previously allocated common buffer.\r
  @param[in] HostAddress   The base address of the previously allocated common buffer.\r
\r
\r
  @retval EFI_SUCCESS             The requested memory pages were freed.\r
  @retval EFI_INVALID_PARAMETER   The memory was not allocated with EFI_ISA_IO.AllocateBufer().\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ISA_IO_PROTOCOL_FREE_BUFFER)(\r
  IN  EFI_ISA_IO_PROTOCOL  *This,\r
  IN  UINTN                Pages,\r
  IN  VOID                 *HostAddress\r
  );\r
\r
/**\r
  Flushes a DMA buffer, which forces all DMA posted write transactions to complete.\r
\r
  @param[in] This   A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
\r
  @retval  EFI_SUCCESS        The DMA buffers were flushed.\r
  @retval  EFI_DEVICE_ERROR   The buffers were not flushed due to a hardware error.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ISA_IO_PROTOCOL_FLUSH)(\r
  IN EFI_ISA_IO_PROTOCOL  *This\r
  );\r
\r
///\r
/// The EFI_ISA_IO_PROTOCOL provides the basic Memory, I/O, and DMA interfaces \r
/// used to abstract accesses to ISA controllers.  There is one EFI_ISA_IO_PROTOCOL \r
/// instance for each ISA controller on a ISA bus. A device driver that wishes \r
/// to manage an ISA controller in a system will have to retrieve the \r
/// ISA_PCI_IO_PROTOCOL instance associated with the ISA controller.\r
///\r
struct _EFI_ISA_IO_PROTOCOL {\r
  EFI_ISA_IO_PROTOCOL_ACCESS           Mem;\r
  EFI_ISA_IO_PROTOCOL_ACCESS           Io;\r
  EFI_ISA_IO_PROTOCOL_COPY_MEM         CopyMem;\r
  EFI_ISA_IO_PROTOCOL_MAP              Map;\r
  EFI_ISA_IO_PROTOCOL_UNMAP            Unmap;\r
  EFI_ISA_IO_PROTOCOL_ALLOCATE_BUFFER  AllocateBuffer;\r
  EFI_ISA_IO_PROTOCOL_FREE_BUFFER      FreeBuffer;\r
  EFI_ISA_IO_PROTOCOL_FLUSH            Flush;\r
  ///\r
  /// The list of I/O , MMIO, DMA, and Interrupt resources associated with the\r
  /// ISA controller abstracted by this instance of the EFI_ISA_IO_PROTOCOL.\r
  ///\r
  EFI_ISA_ACPI_RESOURCE_LIST           *ResourceList;\r
  ///\r
  /// The size, in bytes, of the ROM image.\r
  ///\r
  UINT32                               RomSize;\r
  ///\r
  /// A pointer to the in memory copy of the ROM image. The ISA Bus Driver is responsible \r
  /// for allocating memory for the ROM image, and copying the contents of the ROM to memory\r
  /// during ISA Bus initialization.\r
  /// \r
  VOID                                 *RomImage;\r
};\r
\r
extern EFI_GUID gEfiIsaIoProtocolGuid;\r
\r
#endif\r
Commit	Line	Data
	1	/** @file\r
	2	ISA I/O Protocol is used by ISA device drivers to perform I/O, MMIO and DMA \r
	3	operations on the ISA controllers they manage.\r
	4	\r
	5	Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved<BR>\r
	6	This program and the accompanying materials are licensed and made available under \r
	7	the terms and conditions of the BSD License that accompanies this distribution. \r
	8	The full text of the license may be found at\r
	9	http://opensource.org/licenses/bsd-license.php. \r
	10	\r
	11	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
	12	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	13	\r
	14	**/\r
	15	\r
	16	#ifndef _EFI_ISA_IO_H_\r
	17	#define _EFI_ISA_IO_H_\r
	18	\r
	19	#include <Protocol/IsaAcpi.h>\r
	20	\r
	21	///\r
	22	/// Global ID for the EFI_ISA_IO_PROTOCOL\r
	23	///\r
	24	#define EFI_ISA_IO_PROTOCOL_GUID \\r
	25	{ \\r
	26	0x7ee2bd44, 0x3da0, 0x11d4, { 0x9a, 0x38, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } \\r
	27	}\r
	28	\r
	29	///\r
	30	/// Forward declaration for the EFI_ISA_IO_PROTOCOL.\r
	31	///\r
	32	typedef struct _EFI_ISA_IO_PROTOCOL EFI_ISA_IO_PROTOCOL;\r
	33	\r
	34	///\r
	35	/// Width of EFI_ISA_IO_PROTOCOL I/O Port and MMIO operations.\r
	36	///\r
	37	typedef enum {\r
	38	EfiIsaIoWidthUint8 = 0, ///< 8-bit operation.\r
	39	EfiIsaIoWidthUint16, ///< 16-bit operation.\r
	40	EfiIsaIoWidthUint32, ///< 32-bit operation\r
	41	EfiIsaIoWidthReserved,\r
	42	EfiIsaIoWidthFifoUint8, ///< 8-bit FIFO operation.\r
	43	EfiIsaIoWidthFifoUint16, ///< 16-bit FIFO operation.\r
	44	EfiIsaIoWidthFifoUint32, ///< 32-bit FIFO operation.\r
	45	EfiIsaIoWidthFifoReserved,\r
	46	EfiIsaIoWidthFillUint8, ///< 8-bit Fill operation.\r
	47	EfiIsaIoWidthFillUint16, ///< 16-bit Fill operation.\r
	48	EfiIsaIoWidthFillUint32, ///< 32-bit Fill operation.\r
	49	EfiIsaIoWidthFillReserved,\r
	50	EfiIsaIoWidthMaximum\r
	51	} EFI_ISA_IO_PROTOCOL_WIDTH;\r
	52	\r
	53	///\r
	54	/// Attributes for the EFI_ISA_IO_PROTOCOL common DMA buffer allocations.\r
	55	///\r
	56	#define EFI_ISA_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x080 ///< Map a memory range so write are combined.\r
	57	#define EFI_ISA_IO_ATTRIBUTE_MEMORY_CACHED 0x800 ///< Map a memory range so all read and write accesses are cached.\r
	58	#define EFI_ISA_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000 ///< Disable a memory range.\r
	59	\r
	60	///\r
	61	/// Channel attribute for EFI_ISA_IO_PROTOCOL slave DMA requests\r
	62	///\r
	63	#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_COMPATIBLE 0x001 ///< Set the speed of the DMA transfer in compatible mode.\r
	64	#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_A 0x002 ///< Not supported.\r
	65	#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_B 0x004 ///< Not supported.\r
	66	#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_C 0x008 ///< Not supported.\r
	67	#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8 0x010 ///< Request 8-bit DMA transfers. Only available on channels 0..3.\r
	68	#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16 0x020 ///< Request 16-bit DMA transfers. Only available on channels 4..7.\r
	69	#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE 0x040 ///< Request a single DMA transfer.\r
	70	#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE 0x080 ///< Request multiple DMA transfers until TC (Terminal Count) or EOP (End of Process).\r
	71	#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_AUTO_INITIALIZE 0x100 ///< Automatically reload base and count at the end of the DMA transfer.\r
	72	\r
	73	///\r
	74	/// The DMA opreration type for EFI_ISA_IO_PROTOCOL DMA requests.\r
	75	///\r
	76	typedef enum {\r
	77	///\r
	78	/// A read operation from system memory by a bus master.\r
	79	///\r
	80	EfiIsaIoOperationBusMasterRead,\r
	81	///\r
	82	/// A write operation to system memory by a bus master.\r
	83	///\r
	84	EfiIsaIoOperationBusMasterWrite,\r
	85	///\r
	86	/// Provides both read and write access to system memory by both the processor\r
	87	/// and a bus master. The buffer is coherent from both the processor's and the \r
	88	/// bus master's point of view.\r
	89	///\r
	90	EfiIsaIoOperationBusMasterCommonBuffer,\r
	91	///\r
	92	/// A read operation from system memory by a slave device.\r
	93	///\r
	94	EfiIsaIoOperationSlaveRead,\r
	95	///\r
	96	/// A write operation to system memory by a slave master.\r
	97	///\r
	98	EfiIsaIoOperationSlaveWrite,\r
	99	EfiIsaIoOperationMaximum\r
	100	} EFI_ISA_IO_PROTOCOL_OPERATION;\r
	101	\r
	102	/**\r
	103	Performs ISA I/O and MMIO Read/Write Cycles\r
	104	\r
	105	@param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance. \r
	106	@param[in] Width Specifies the width of the I/O or MMIO operation.\r
	107	@param[in] Offset The offset into the ISA I/O or MMIO space to start the \r
	108	operation. \r
	109	@param[in] Count The number of I/O or MMIO operations to perform.\r
	110	@param[in, out] Buffer For read operations, the destination buffer to store \r
	111	the results. For write operations, the source buffer to \r
	112	write data from. \r
	113	\r
	114	@retval EFI_SUCCESS The data was successfully read from or written to the device.\r
	115	@retval EFI_UNSUPPORTED The Offset is not valid for this device.\r
	116	@retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r
	117	@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r
	118	\r
	119	**/\r
	120	typedef\r
	121	EFI_STATUS\r
	122	(EFIAPI *EFI_ISA_IO_PROTOCOL_IO_MEM)(\r
	123	IN EFI_ISA_IO_PROTOCOL *This,\r
	124	IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r
	125	IN UINT32 Offset,\r
	126	IN UINTN Count,\r
	127	IN OUT VOID *Buffer\r
	128	);\r
	129	\r
	130	///\r
	131	/// Structure of functions for accessing ISA I/O and MMIO space.\r
	132	///\r
	133	typedef struct {\r
	134	///\r
	135	/// Read from ISA I/O or MMIO space.\r
	136	///\r
	137	EFI_ISA_IO_PROTOCOL_IO_MEM Read;\r
	138	///\r
	139	/// Write to ISA I/O or MMIO space.\r
	140	///\r
	141	EFI_ISA_IO_PROTOCOL_IO_MEM Write;\r
	142	} EFI_ISA_IO_PROTOCOL_ACCESS;\r
	143	\r
	144	/**\r
	145	Copies data from one region of ISA MMIO space to another region of ISA\r
	146	MMIO space.\r
	147	\r
	148	@param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
	149	@param[in] Width Specifies the width of the MMIO copy operation.\r
	150	@param[in] DestOffset The offset of the destination in ISA MMIO space.\r
	151	@param[in] SrcOffset The offset of the source in ISA MMIO space.\r
	152	@param[in] Count The number tranfers to perform for this copy operation.\r
	153	\r
	154	@retval EFI_SUCCESS The data was copied sucessfully.\r
	155	@retval EFI_UNSUPPORTED The DestOffset or SrcOffset is not valid for this device.\r
	156	@retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r
	157	@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r
	158	\r
	159	**/\r
	160	typedef\r
	161	EFI_STATUS\r
	162	(EFIAPI *EFI_ISA_IO_PROTOCOL_COPY_MEM)(\r
	163	IN EFI_ISA_IO_PROTOCOL *This,\r
	164	IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r
	165	IN UINT32 DestOffset,\r
	166	IN UINT32 SrcOffset,\r
	167	IN UINTN Count\r
	168	);\r
	169	\r
	170	/**\r
	171	Maps a memory region for DMA.\r
	172	\r
	173	This function returns the device-specific addresses required to access system memory.\r
	174	This function is used to map system memory for ISA DMA operations. All ISA DMA \r
	175	operations must be performed through their mapped addresses, and such mappings must \r
	176	be freed with EFI_ISA_IO_PROTOCOL.Unmap() after the DMA operation is completed.\r
	177	\r
	178	If the DMA operation is a single read or write data transfer through an ISA bus \r
	179	master, then EfiIsaIoOperationBusMasterRead or EfiIsaIoOperationBusMasterWrite \r
	180	is used and the range is unmapped to complete the operation. If the DMA operation\r
	181	is a single read or write data transfer through an ISA slave controller, then \r
	182	EfiIsaIoOperationSlaveRead or EfiIsaIoOperationSlaveWrite is used and the range \r
	183	is unmapped to complete the operation. \r
	184	\r
	185	If performing a DMA read operation, all the data must be present in system memory before the Map() is performed. Similarly, \r
	186	if performing a DMA write operation, the data must not be accessed in system \r
	187	memory until EFI_ISA_IO_PROTOCOL.Unmap() is performed. Bus master operations that \r
	188	require both read and write access or require multiple host device interactions \r
	189	within the same mapped region must use EfiIsaIoOperationBusMasterCommonBuffer. \r
	190	However, only memory allocated via the EFI_ISA_IO_PROTOCOL.AllocateBuffer() interface \r
	191	is guaranteed to be able to be mapped for this operation type. In all mapping \r
	192	requests the NumberOfBytes returned may be less than originally requested. It is\r
	193	the caller's responsibility to make additional requests to complete the entire\r
	194	transfer.\r
	195	\r
	196	@param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
	197	@param[in] Operation Indicates the type of DMA (slave or bus master), \r
	198	and if the DMA operation is going to read or \r
	199	write to system memory. \r
	200	@param[in] ChannelNumber The slave channel number to use for this DMA \r
	201	operation. If Operation and ChannelAttributes \r
	202	shows that this device performs bus mastering \r
	203	DMA, then this field is ignored. The legal \r
	204	range for this field is 0..7.\r
	205	@param[in] ChannelAttributes A bitmask of the attributes used to configure\r
	206	the slave DMA channel for this DMA operation. \r
	207	See EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_* for the\r
	208	legal bit combinations.\r
	209	@param[in] HostAddress The system memory address to map to the device.\r
	210	@param[in, out] NumberOfBytes On input the number of bytes to map. On \r
	211	output the number of bytes that were mapped.\r
	212	@param[out] DeviceAddress The resulting map address for the bus master \r
	213	device to use to access the hosts HostAddress. \r
	214	@param[out] Mapping A returned value that must be passed to into\r
	215	EFI_ISA_IO_PROTOCOL.Unmap() to free all the the \r
	216	resources associated with this map request.\r
	217	\r
	218	@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r
	219	@retval EFI_INVALID_PARAMETER The Operation is undefined.\r
	220	@retval EFI_INVALID_PARAMETER The HostAddress is undefined.\r
	221	@retval EFI_UNSUPPORTED The HostAddress can not be mapped as a common buffer.\r
	222	@retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r
	223	@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r
	224	\r
	225	**/\r
	226	typedef\r
	227	EFI_STATUS\r
	228	(EFIAPI *EFI_ISA_IO_PROTOCOL_MAP)(\r
	229	IN EFI_ISA_IO_PROTOCOL *This,\r
	230	IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,\r
	231	IN UINT8 ChannelNumber OPTIONAL,\r
	232	IN UINT32 ChannelAttributes,\r
	233	IN VOID *HostAddress,\r
	234	IN OUT UINTN *NumberOfBytes,\r
	235	OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r
	236	OUT VOID **Mapping\r
	237	);\r
	238	\r
	239	/**\r
	240	Unmaps a memory region that was previously mapped with EFI_ISA_IO_PROTOCOL.Map().\r
	241	\r
	242	The EFI_ISA_IO_PROTOCOL.Map() operation is completed and any corresponding \r
	243	resources are released. If the operation was EfiIsaIoOperationSlaveWrite \r
	244	or EfiIsaIoOperationBusMasterWrite, the data is committed to system memory. \r
	245	Any resources used for the mapping are freed.\r
	246	\r
	247	@param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
	248	@param[in] Mapping The mapping value returned from EFI_ISA_IO_PROTOCOL.Map().\r
	249	\r
	250	@retval EFI_SUCCESS The memory region was unmapped.\r
	251	@retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\r
	252	**/\r
	253	typedef\r
	254	EFI_STATUS\r
	255	(EFIAPI *EFI_ISA_IO_PROTOCOL_UNMAP)(\r
	256	IN EFI_ISA_IO_PROTOCOL *This,\r
	257	IN VOID *Mapping\r
	258	);\r
	259	\r
	260	/**\r
	261	Allocates pages that are suitable for an EfiIsaIoOperationBusMasterCommonBuffer\r
	262	mapping. \r
	263	\r
	264	@param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
	265	@param[in] Type The type allocation to perform. \r
	266	@param[in] MemoryType The type of memory to allocate.\r
	267	@param[in] Pages The number of pages to allocate.\r
	268	@param[out] HostAddress A pointer to store the base address of the allocated range.\r
	269	@param[in] Attributes The requested bit mask of attributes for the allocated range.\r
	270	\r
	271	@retval EFI_SUCCESS The requested memory pages were allocated.\r
	272	@retval EFI_INVALID_PARAMETER Type is invalid.\r
	273	@retval EFI_INVALID_PARAMETER MemoryType is invalid.\r
	274	@retval EFI_INVALID_PARAMETER HostAddress is NULL.\r
	275	@retval EFI_UNSUPPORTED Attributes is unsupported.\r
	276	@retval EFI_UNSUPPORTED The memory range specified by HostAddress, Pages,\r
	277	and Type is not available for common buffer use.\r
	278	@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r
	279	\r
	280	**/\r
	281	typedef\r
	282	EFI_STATUS\r
	283	(EFIAPI *EFI_ISA_IO_PROTOCOL_ALLOCATE_BUFFER)(\r
	284	IN EFI_ISA_IO_PROTOCOL *This,\r
	285	IN EFI_ALLOCATE_TYPE Type,\r
	286	IN EFI_MEMORY_TYPE MemoryType,\r
	287	IN UINTN Pages,\r
	288	OUT VOID **HostAddress,\r
	289	IN UINT64 Attributes\r
	290	);\r
	291	\r
	292	/**\r
	293	Frees a common buffer that was allocated with EFI_ISA_IO_PROTOCOL.AllocateBuffer().\r
	294	\r
	295	@param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
	296	@param[in] Pages The number of pages to free from the previously allocated common buffer.\r
	297	@param[in] HostAddress The base address of the previously allocated common buffer.\r
	298	\r
	299	\r
	300	@retval EFI_SUCCESS The requested memory pages were freed.\r
	301	@retval EFI_INVALID_PARAMETER The memory was not allocated with EFI_ISA_IO.AllocateBufer().\r
	302	\r
	303	**/\r
	304	typedef\r
	305	EFI_STATUS\r
	306	(EFIAPI *EFI_ISA_IO_PROTOCOL_FREE_BUFFER)(\r
	307	IN EFI_ISA_IO_PROTOCOL *This,\r
	308	IN UINTN Pages,\r
	309	IN VOID *HostAddress\r
	310	);\r
	311	\r
	312	/**\r
	313	Flushes a DMA buffer, which forces all DMA posted write transactions to complete.\r
	314	\r
	315	@param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
	316	\r
	317	@retval EFI_SUCCESS The DMA buffers were flushed.\r
	318	@retval EFI_DEVICE_ERROR The buffers were not flushed due to a hardware error.\r
	319	\r
	320	**/\r
	321	typedef\r
	322	EFI_STATUS\r
	323	(EFIAPI *EFI_ISA_IO_PROTOCOL_FLUSH)(\r
	324	IN EFI_ISA_IO_PROTOCOL *This\r
	325	);\r
	326	\r
	327	///\r
	328	/// The EFI_ISA_IO_PROTOCOL provides the basic Memory, I/O, and DMA interfaces \r
	329	/// used to abstract accesses to ISA controllers. There is one EFI_ISA_IO_PROTOCOL \r
	330	/// instance for each ISA controller on a ISA bus. A device driver that wishes \r
	331	/// to manage an ISA controller in a system will have to retrieve the \r
	332	/// ISA_PCI_IO_PROTOCOL instance associated with the ISA controller.\r
	333	///\r
	334	struct _EFI_ISA_IO_PROTOCOL {\r
	335	EFI_ISA_IO_PROTOCOL_ACCESS Mem;\r
	336	EFI_ISA_IO_PROTOCOL_ACCESS Io;\r
	337	EFI_ISA_IO_PROTOCOL_COPY_MEM CopyMem;\r
	338	EFI_ISA_IO_PROTOCOL_MAP Map;\r
	339	EFI_ISA_IO_PROTOCOL_UNMAP Unmap;\r
	340	EFI_ISA_IO_PROTOCOL_ALLOCATE_BUFFER AllocateBuffer;\r
	341	EFI_ISA_IO_PROTOCOL_FREE_BUFFER FreeBuffer;\r
	342	EFI_ISA_IO_PROTOCOL_FLUSH Flush;\r
	343	///\r
	344	/// The list of I/O , MMIO, DMA, and Interrupt resources associated with the\r
	345	/// ISA controller abstracted by this instance of the EFI_ISA_IO_PROTOCOL.\r
	346	///\r
	347	EFI_ISA_ACPI_RESOURCE_LIST *ResourceList;\r
	348	///\r
	349	/// The size, in bytes, of the ROM image.\r
	350	///\r
	351	UINT32 RomSize;\r
	352	///\r
	353	/// A pointer to the in memory copy of the ROM image. The ISA Bus Driver is responsible \r
	354	/// for allocating memory for the ROM image, and copying the contents of the ROM to memory\r
	355	/// during ISA Bus initialization.\r
	356	/// \r
	357	VOID *RomImage;\r
	358	};\r
	359	\r
	360	extern EFI_GUID gEfiIsaIoProtocolGuid;\r
	361	\r
	362	#endif\r