diff options
Diffstat (limited to 'IntelFrameworkPkg/Include/Protocol/CpuIo.h')
| -rw-r--r-- | IntelFrameworkPkg/Include/Protocol/CpuIo.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/IntelFrameworkPkg/Include/Protocol/CpuIo.h b/IntelFrameworkPkg/Include/Protocol/CpuIo.h new file mode 100644 index 0000000000..38f910ea94 --- /dev/null +++ b/IntelFrameworkPkg/Include/Protocol/CpuIo.h @@ -0,0 +1,125 @@ +/** @file
+ This code abstracts the CPU IO Protocol
+
+ Copyright (c) 2007, Intel Corporation
+ All rights reserved. This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ Module Name: CpuIO.h
+
+ @par Revision Reference:
+ CPU IO Protocol is defined in Framework of EFI CPU IO Protocol Spec
+ Version 0.9
+
+**/
+
+#ifndef _CPUIO_H_
+#define _CPUIO_H_
+
+#define EFI_CPU_IO_PROTOCOL_GUID \
+ { \
+ 0xB0732526, 0x38C8, 0x4b40, {0x88, 0x77, 0x61, 0xC7, 0xB0, 0x6A, 0xAC, 0x45 } \
+ }
+
+typedef struct _EFI_CPU_IO_PROTOCOL EFI_CPU_IO_PROTOCOL;
+
+//
+// *******************************************************
+// EFI_CPU_IO_PROTOCOL_WIDTH
+// *******************************************************
+//
+typedef enum {
+ EfiCpuIoWidthUint8,
+ EfiCpuIoWidthUint16,
+ EfiCpuIoWidthUint32,
+ EfiCpuIoWidthUint64,
+ EfiCpuIoWidthFifoUint8,
+ EfiCpuIoWidthFifoUint16,
+ EfiCpuIoWidthFifoUint32,
+ EfiCpuIoWidthFifoUint64,
+ EfiCpuIoWidthFillUint8,
+ EfiCpuIoWidthFillUint16,
+ EfiCpuIoWidthFillUint32,
+ EfiCpuIoWidthFillUint64,
+ EfiCpuIoWidthMaximum
+} EFI_CPU_IO_PROTOCOL_WIDTH;
+
+//
+// *******************************************************
+// EFI_CPU_IO_PROTOCOL_IO_MEM
+// *******************************************************
+//
+/**
+ Enables a driver to access memory-mapped registers in the EFI system memory space.
+ Or, Enables a driver to access registers in the EFI CPU I/O space.
+
+ @param This A pointer to the EFI_CPU_IO_PROTOCOL instance.
+ @param Width Signifies the width of the I/O or Memory operation.
+ @param Address The base address of the I/O or Memoryoperation.
+ @param Count The number of I/O or Memory operations to perform.
+ The number of bytes moved is Width size * Count, starting at Address.
+ @param Buffer For read operations, the destination buffer to store the results.
+ For write operations, the source buffer from which to write data.
+
+ @retval EFI_SUCCESS The data was read from or written to the EFI system.
+ @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.
+ @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
+ Or,The address range specified by Address, Width, and Count is not valid for this EFI system.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_CPU_IO_PROTOCOL_IO_MEM) (
+ IN EFI_CPU_IO_PROTOCOL *This,
+ IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN OUT VOID *Buffer
+ );
+
+//
+// *******************************************************
+// EFI_CPU_IO_PROTOCOL_ACCESS
+// *******************************************************
+//
+typedef struct {
+ EFI_CPU_IO_PROTOCOL_IO_MEM Read;
+ EFI_CPU_IO_PROTOCOL_IO_MEM Write;
+} EFI_CPU_IO_PROTOCOL_ACCESS;
+
+//
+// *******************************************************
+// EFI_CPU_IO_PROTOCOL
+// *******************************************************
+//
+/**
+ @par Protocol Description:
+ Provides the basic memory and I/O interfaces that are used to abstract
+ accesses to devices in a system.
+
+ @param Mem.Read
+ Allows reads from memory-mapped I/O space.
+
+ @param Mem.Write
+ Allows writes to memory-mapped I/O space.
+
+ @param Io.Read
+ Allows reads from I/O space.
+
+ @param Io.Write
+ Allows writes to I/O space.
+
+**/
+struct _EFI_CPU_IO_PROTOCOL {
+ EFI_CPU_IO_PROTOCOL_ACCESS Mem;
+ EFI_CPU_IO_PROTOCOL_ACCESS Io;
+};
+
+extern EFI_GUID gEfiCpuIoProtocolGuid;
+
+#endif
|