+/**\r
+ Memory-based read services.\r
+ \r
+ This function is to perform the Memory Access Read service based on installed \r
+ instance of the EFI_PEI_CPU_IO_PPI. \r
+ If the EFI_PEI_CPU_IO_PPI is not installed by platform/chipset PEIM, then \r
+ return EFI_NOT_YET_AVAILABLE. \r
+ \r
+ @param PeiServices An indirect pointer to the PEI Services Table\r
+ published by the PEI Foundation.\r
+ @param This Pointer to local data for the interface.\r
+ @param Width The width of the access. Enumerated in bytes.\r
+ @param Address The physical address of the access.\r
+ @param Count The number of accesses to perform.\r
+ @param Buffer A pointer to the buffer of data.\r
+\r
+ @retval EFI_SUCCESS The function completed successfully.\r
+ @retval EFI_NOT_YET_AVAILABLE The service has not been installed. \r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+PeiDefaultMemRead (\r
+ IN CONST EFI_PEI_SERVICES **PeiServices,\r
+ IN CONST EFI_PEI_CPU_IO_PPI *This,\r
+ IN EFI_PEI_CPU_IO_PPI_WIDTH Width,\r
+ IN UINT64 Address,\r
+ IN UINTN Count,\r
+ IN OUT VOID *Buffer\r
+ );\r
+ \r
+/**\r
+ Memory-based write services.\r
+ \r
+ This function is to perform the Memory Access Write service based on installed \r
+ instance of the EFI_PEI_CPU_IO_PPI. \r
+ If the EFI_PEI_CPU_IO_PPI is not installed by platform/chipset PEIM, then \r
+ return EFI_NOT_YET_AVAILABLE. \r
+ \r
+ @param PeiServices An indirect pointer to the PEI Services Table\r
+ published by the PEI Foundation.\r
+ @param This Pointer to local data for the interface.\r
+ @param Width The width of the access. Enumerated in bytes.\r
+ @param Address The physical address of the access.\r
+ @param Count The number of accesses to perform.\r
+ @param Buffer A pointer to the buffer of data.\r
+\r
+ @retval EFI_SUCCESS The function completed successfully.\r
+ @retval EFI_NOT_YET_AVAILABLE The service has not been installed. \r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+PeiDefaultMemWrite (\r
+ IN CONST EFI_PEI_SERVICES **PeiServices,\r
+ IN CONST EFI_PEI_CPU_IO_PPI *This,\r
+ IN EFI_PEI_CPU_IO_PPI_WIDTH Width,\r
+ IN UINT64 Address,\r
+ IN UINTN Count,\r
+ IN OUT VOID *Buffer\r
+ );\r
+ \r
+/**\r
+ IO-based read services.\r
+ \r
+ This function is to perform the IO-base read service for the EFI_PEI_CPU_IO_PPI.\r
+ If the EFI_PEI_CPU_IO_PPI is not installed by platform/chipset PEIM, then \r
+ return EFI_NOT_YET_AVAILABLE. \r
+ \r
+ @param PeiServices An indirect pointer to the PEI Services Table\r
+ published by the PEI Foundation.\r
+ @param This Pointer to local data for the interface.\r
+ @param Width The width of the access. Enumerated in bytes.\r
+ @param Address The physical address of the access.\r
+ @param Count The number of accesses to perform.\r
+ @param Buffer A pointer to the buffer of data.\r
+\r
+ @retval EFI_SUCCESS The function completed successfully.\r
+ @retval EFI_NOT_YET_AVAILABLE The service has not been installed.\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+PeiDefaultIoRead (\r
+ IN CONST EFI_PEI_SERVICES **PeiServices,\r
+ IN CONST EFI_PEI_CPU_IO_PPI *This,\r
+ IN EFI_PEI_CPU_IO_PPI_WIDTH Width,\r
+ IN UINT64 Address,\r
+ IN UINTN Count,\r
+ IN OUT VOID *Buffer\r
+ );\r
+ \r
+/**\r
+ IO-based write services.\r
+ \r
+ This function is to perform the IO-base write service for the EFI_PEI_CPU_IO_PPI.\r
+ If the EFI_PEI_CPU_IO_PPI is not installed by platform/chipset PEIM, then \r
+ return EFI_NOT_YET_AVAILABLE. \r
+ \r
+ @param PeiServices An indirect pointer to the PEI Services Table\r
+ published by the PEI Foundation.\r
+ @param This Pointer to local data for the interface.\r
+ @param Width The width of the access. Enumerated in bytes.\r
+ @param Address The physical address of the access.\r
+ @param Count The number of accesses to perform.\r
+ @param Buffer A pointer to the buffer of data.\r
+\r
+ @retval EFI_SUCCESS The function completed successfully.\r
+ @retval EFI_NOT_YET_AVAILABLE The service has not been installed.\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+PeiDefaultIoWrite (\r
+ IN CONST EFI_PEI_SERVICES **PeiServices,\r
+ IN CONST EFI_PEI_CPU_IO_PPI *This,\r
+ IN EFI_PEI_CPU_IO_PPI_WIDTH Width,\r
+ IN UINT64 Address,\r
+ IN UINTN Count,\r
+ IN OUT VOID *Buffer\r
+ );\r
+ \r
+/**\r
+ 8-bit I/O read operations.\r
+ \r
+ If the EFI_PEI_CPU_IO_PPI is not installed by platform/chipset PEIM, then \r
+ return 0.\r
+ \r
+ @param PeiServices An indirect pointer to the PEI Services Table published by the PEI Foundation.\r
+ @param This Pointer to local data for the interface.\r
+ @param Address The physical address of the access.\r