/** @file\r
- ISA I/O Protocol is used to perform ISA device Io/Mem operations.\r
-\r
-Copyright (c) 2006 - 2009, Intel Corporation \r
-All rights reserved. This program and the accompanying materials \r
-are licensed and made available under the terms and conditions of the BSD License \r
-which accompanies this distribution. 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
+ 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 - 2009, Intel Corporation\r
+ All rights reserved. This program and the accompanying materials\r
+ are licensed and made available under the terms and conditions of the BSD License\r
+ which accompanies this distribution. 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
-\r
#include <Protocol/IsaAcpi.h>\r
\r
-//\r
-// Global GUID for the ISA I/O Protocol\r
-//\r
+///\r
+/// Global ID for the EFI_ISA_IO_PROTOCOL\r
+///\r
#define EFI_ISA_IO_PROTOCOL_GUID \\r
- { 0x7ee2bd44, 0x3da0, 0x11d4, { 0x9a, 0x38, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } }\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 ISA Io/Mem operation\r
-//\r
+///\r
+/// Width of EFI_ISA_IO_PROTOCOL I/O Port and MMIO operations\r
+///\r
typedef enum {\r
- EfiIsaIoWidthUint8,\r
- EfiIsaIoWidthUint16,\r
- EfiIsaIoWidthUint32,\r
+ EfiIsaIoWidthUint8 = 0, ///< 8-bit operation\r
+ EfiIsaIoWidthUint16, ///< 16-bit operation\r
+ EfiIsaIoWidthUint32, ///< 32-bit operation\r
EfiIsaIoWidthReserved,\r
- EfiIsaIoWidthFifoUint8,\r
- EfiIsaIoWidthFifoUint16,\r
- EfiIsaIoWidthFifoUint32,\r
+ EfiIsaIoWidthFifoUint8, ///< 8-bit FIFO operation\r
+ EfiIsaIoWidthFifoUint16, ///< 16-bit FIFO operation\r
+ EfiIsaIoWidthFifoUint32, ///< 32-bit FIFO operation\r
EfiIsaIoWidthFifoReserved,\r
- EfiIsaIoWidthFillUint8,\r
- EfiIsaIoWidthFillUint16,\r
- EfiIsaIoWidthFillUint32,\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 common buffer allocations\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 r/w accesses are cached\r
#define EFI_ISA_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000 ///< Disable a memory range \r
\r
-//\r
-// Channel attribute for DMA operations\r
-//\r
-#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_COMPATIBLE 0x001\r
-#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_A 0x002\r
-#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_B 0x004\r
-#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_C 0x008\r
-#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8 0x010\r
-#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16 0x020\r
-#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE 0x040\r
-#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE 0x080\r
-#define EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_AUTO_INITIALIZE 0x100\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 an ISA Io/Memory Read/Write Cycle\r
-\r
- @param This A pointer to the EFI_ISA_IO_PROTOCOL instance. \r
- @param Width Signifies the width of the Io/Memory operation.\r
- @param Offset The offset in ISA Io/Memory space to start the Io/Memory operation. \r
- @param Count The number of Io/Memory operations to perform.\r
- @param Buffer [OUT] The destination buffer to store the results.\r
- [IN] The source buffer to write data to the device.\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 read from / written to the device sucessfully.\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
**/\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
+(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
- Performs an ISA I/O Copy Memory \r
+ Copies data from one region of ISA MMIO space to another region of ISA\r
+ MMIO space.\r
\r
- @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
- @param Width Signifies the width of the memory copy operation.\r
- @param DestOffset The offset of the destination \r
- @param SrcOffset The offset of the source\r
- @param Count The number of memory copy operations to perform\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
**/\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
+(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
- @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
- @param Operation Indicates the type of DMA (slave or bus master), and if \r
- the DMA operation is going to read or write to system memory. \r
- @param ChannelNumber The slave channel number to use for this DMA operation. \r
- If Operation and ChannelAttributes shows that this device \r
- performs bus mastering DMA, then this field is ignored. \r
- The legal range for this field is 0..7. \r
- @param ChannelAttributes The attributes of the DMA channel to use for this DMA operation\r
- @param HostAddress The system memory address to map to the device. \r
- @param NumberOfBytes On input the number of bytes to map. On output the number \r
- of bytes that were mapped.\r
- @param DeviceAddress The resulting map address for the bus master device to use \r
- to access the hosts HostAddress. \r
- @param Mapping A resulting value to pass to EFI_ISA_IO.Unmap().\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
+ 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. If performing a DMA read operation, all \r
+ 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
+ are 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 or HostAddress is undefined.\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
typedef\r
EFI_STATUS\r
-(EFIAPI *EFI_ISA_IO_PROTOCOL_MAP) (\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
);\r
\r
/**\r
- Unmaps a memory region for DMA\r
+ Unmaps a memory region that was previously mapped with EFI_ISA_IO_PROTOCOL.Map()\r
\r
- @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
- @param Mapping The mapping value returned from EFI_ISA_IO.Map().\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
- @retval EFI_SUCCESS The range was unmapped.\r
- @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\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
+(EFIAPI *EFI_ISA_IO_PROTOCOL_UNMAP)(\r
+ IN EFI_ISA_IO_PROTOCOL *This,\r
+ IN VOID *Mapping\r
);\r
\r
/**\r
- Allocates a common buffer for DMA\r
+ Allocates pages that are suitable for an EfiIsaIoOperationBusMasterCommonBuffer\r
+ mapping. \r
\r
- @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
- @param Type The type allocation to perform.\r
- @param MemoryType The type of memory to allocate.\r
- @param Pages The number of pages to allocate.\r
- @param HostAddress A pointer to store the base address of the allocated range.\r
- @param Attributes The requested bit mask of attributes for the allocated range.\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 or MemoryType is invalid or HostAddress is NULL\r
- @retval EFI_UNSUPPORTED Attributes is unsupported or the memory range specified \r
- by HostAddress, Pages, and Type is not available for common buffer use.\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
+(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 \r
+ Frees a common buffer that was allocated with EFI_ISA_IO_PROTOCOL.AllocateBuffer()\r
\r
- @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
- @param Pages The number of pages to free.\r
- @param HostAddress The base address of the allocated range.\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
**/\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
+(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\r
+ Flushes a DMA buffer. This forces all DMA posted write transactions to complete.\r
\r
- @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
+ @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
\r
- @retval EFI_SUCCESS The buffers were flushed.\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
+(EFIAPI *EFI_ISA_IO_PROTOCOL_FLUSH)(\r
+ IN EFI_ISA_IO_PROTOCOL *This\r
);\r
\r
-//\r
-// Interface structure for the ISA I/O Protocol\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 that is 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_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
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