diff options
Diffstat (limited to 'IntelFrameworkPkg/Include/Protocol/SmmCpuIo.h')
-rw-r--r-- | IntelFrameworkPkg/Include/Protocol/SmmCpuIo.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/IntelFrameworkPkg/Include/Protocol/SmmCpuIo.h b/IntelFrameworkPkg/Include/Protocol/SmmCpuIo.h new file mode 100644 index 0000000..158f216 --- /dev/null +++ b/IntelFrameworkPkg/Include/Protocol/SmmCpuIo.h @@ -0,0 +1,88 @@ +/** @file
+ SMM CPU I/O protocol as defined in the Intel Framework specification.
+
+ This protocol provides CPU I/O and memory access within SMM.
+
+ Copyright (c) 2009 - 2010, 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.
+
+**/
+
+#ifndef _SMM_CPU_IO_H_
+#define _SMM_CPU_IO_H_
+
+#include <Protocol/SmmCpuIo2.h>
+
+#define EFI_SMM_CPU_IO_GUID \
+ { \
+ 0x5f439a0b, 0x45d8, 0x4682, {0xa4, 0xf4, 0xf0, 0x57, 0x6b, 0x51, 0x34, 0x41} \
+ }
+
+typedef struct _EFI_SMM_CPU_IO_INTERFACE EFI_SMM_CPU_IO_INTERFACE;
+
+/**
+ Provides the basic memory and I/O interfaces used to abstract accesses to devices.
+
+ The I/O operations are carried out exactly as requested. The caller is
+ responsible for any alignment and I/O width issues that the bus, device,
+ platform, or type of I/O might require.
+
+ @param[in] This The EFI_SMM_CPU_IO_INTERFACE instance.
+ @param[in] Width Signifies the width of the I/O operations.
+ @param[in] Address The base address of the I/O operations. The caller is
+ responsible for aligning the Address if required.
+ @param[in] Count The number of I/O operations to perform.
+ @param[in,out] 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 device.
+ @retval EFI_UNSUPPORTED The Address is not valid for this system.
+ @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
+ of resources.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SMM_CPU_IO)(
+ IN EFI_SMM_CPU_IO_INTERFACE *This,
+ IN EFI_SMM_IO_WIDTH Width,
+ IN UINT64 Address,
+ IN UINTN Count,
+ IN OUT VOID *Buffer
+ );
+
+typedef struct {
+ ///
+ /// This service provides the various modalities of memory and I/O read.
+ ///
+ EFI_SMM_CPU_IO Read;
+ ///
+ /// This service provides the various modalities of memory and I/O write.
+ ///
+ EFI_SMM_CPU_IO Write;
+} EFI_SMM_IO_ACCESS;
+
+///
+/// SMM CPU I/O Protocol provides CPU I/O and memory access within SMM.
+///
+struct _EFI_SMM_CPU_IO_INTERFACE {
+ ///
+ /// Allows reads and writes to memory-mapped I/O space.
+ ///
+ EFI_SMM_IO_ACCESS Mem;
+ ///
+ /// Allows reads and writes to I/O space.
+ ///
+ EFI_SMM_IO_ACCESS Io;
+};
+
+extern EFI_GUID gEfiSmmCpuIoGuid;
+
+#endif
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