/** @file\r
- EFI ISA I/O Protocol\r
+ ISA I/O Protocol is used to perform ISA device Io/Mem operations.\r
\r
-Copyright (c) 2006 - 2007, Intel Corporation \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
#include <Protocol/IsaAcpi.h>\r
\r
//\r
-// Global ID for the ISA I/O Protocol\r
+// Global GUID for the ISA I/O Protocol\r
//\r
-\r
#define EFI_ISA_IO_PROTOCOL_GUID \\r
{ 0x7ee2bd44, 0x3da0, 0x11d4, { 0x9a, 0x38, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } }\r
\r
typedef struct _EFI_ISA_IO_PROTOCOL EFI_ISA_IO_PROTOCOL;\r
\r
//\r
-// Prototypes for the ISA I/O Protocol\r
+// Width of ISA Io/Mem operation\r
//\r
-\r
typedef enum {\r
EfiIsaIoWidthUint8,\r
EfiIsaIoWidthUint16,\r
//\r
// Attributes for common 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
+#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
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
+ @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
+ @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
EFI_ISA_IO_PROTOCOL_IO_MEM Write;\r
} EFI_ISA_IO_PROTOCOL_ACCESS;\r
\r
+/**\r
+ Performs an ISA I/O Copy Memory \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
+\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 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
+\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_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
OUT VOID **Mapping\r
);\r
\r
+/**\r
+ Unmaps a memory region for DMA\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
+\r
+ @retval EFI_SUCCESS The range was unmapped.\r
+ @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\r
+\r
+**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_ISA_IO_PROTOCOL_UNMAP) (\r
IN VOID *Mapping\r
);\r
\r
+/**\r
+ Allocates a common buffer for DMA\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
+\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_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 UINT64 Attributes\r
);\r
\r
+/**\r
+ Frees a common buffer \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
+\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 VOID *HostAddress\r
);\r
\r
+/**\r
+ Flushes a DMA buffer\r
+\r
+ @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r
+\r
+ @retval EFI_SUCCESS The 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
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