--- /dev/null
+/** @file\r
+ SMM CPU I/O protocol as defined in the Intel Framework specification.\r
+\r
+ This protocol provides CPU I/O and memory access within SMM.\r
+\r
+ Copyright (c) 2009 - 2010, 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 _SMM_CPU_IO_H_\r
+#define _SMM_CPU_IO_H_\r
+\r
+#include <Protocol/SmmCpuIo2.h>\r
+\r
+#define EFI_SMM_CPU_IO_GUID \\r
+ { \\r
+ 0x5f439a0b, 0x45d8, 0x4682, {0xa4, 0xf4, 0xf0, 0x57, 0x6b, 0x51, 0x34, 0x41} \\r
+ }\r
+\r
+typedef struct _EFI_SMM_CPU_IO_INTERFACE EFI_SMM_CPU_IO_INTERFACE;\r
+\r
+/**\r
+ Provides the basic memory and I/O interfaces used to abstract accesses to devices.\r
+\r
+ The I/O operations are carried out exactly as requested. The caller is \r
+ responsible for any alignment and I/O width issues that the bus, device, \r
+ platform, or type of I/O might require.\r
+\r
+ @param[in] This The EFI_SMM_CPU_IO_INTERFACE instance.\r
+ @param[in] Width Signifies the width of the I/O operations.\r
+ @param[in] Address The base address of the I/O operations. The caller is \r
+ responsible for aligning the Address if required. \r
+ @param[in] Count The number of I/O 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 \r
+ from which to write data.\r
+\r
+ @retval EFI_SUCCESS The data was read from or written to the device.\r
+ @retval EFI_UNSUPPORTED The Address is not valid for this system.\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\r
+ of resources.\r
+**/\r
+typedef\r
+EFI_STATUS\r
+(EFIAPI *EFI_SMM_CPU_IO)(\r
+ IN EFI_SMM_CPU_IO_INTERFACE *This,\r
+ IN EFI_SMM_IO_WIDTH Width,\r
+ IN UINT64 Address,\r
+ IN UINTN Count,\r
+ IN OUT VOID *Buffer\r
+ );\r
+\r
+typedef struct {\r
+ ///\r
+ /// This service provides the various modalities of memory and I/O read.\r
+ ///\r
+ EFI_SMM_CPU_IO Read;\r
+ ///\r
+ /// This service provides the various modalities of memory and I/O write.\r
+ ///\r
+ EFI_SMM_CPU_IO Write;\r
+} EFI_SMM_IO_ACCESS;\r
+\r
+///\r
+/// SMM CPU I/O Protocol provides CPU I/O and memory access within SMM.\r
+///\r
+struct _EFI_SMM_CPU_IO_INTERFACE {\r
+ ///\r
+ /// Allows reads and writes to memory-mapped I/O space.\r
+ ///\r
+ EFI_SMM_IO_ACCESS Mem;\r
+ ///\r
+ /// Allows reads and writes to I/O space.\r
+ ///\r
+ EFI_SMM_IO_ACCESS Io;\r
+};\r
+\r
+extern EFI_GUID gEfiSmmCpuIoGuid;\r
+\r
+#endif\r