/** @file\r
This code abstracts the CPU IO Protocol which installed by some platform or chipset-specific \r
- PEIM that abstracts the processor-visible I/O operations.\r
+ PEIM that abstracts the processor-visible I/O operations. \r
+ \r
+ Note: This is a runtime protocol and can be used by runtime drivers after ExitBootServices().\r
+ It is different from the PI 1.2 CPU I/O 2 Protocol, which is a boot services only protocol\r
+ and may not be used by runtime drivers after ExitBootServices().\r
\r
- Copyright (c) 2007, Intel Corporation\r
+ Copyright (c) 2007 - 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
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
- Module Name: CpuIO.h\r
-\r
@par Revision Reference:\r
CPU IO Protocol is defined in Framework of EFI CPU IO Protocol Spec\r
Version 0.9\r
#ifndef _CPUIO_H_\r
#define _CPUIO_H_\r
\r
-#include <PiDxe.h>\r
+#include <Protocol/CpuIo2.h>\r
\r
#define EFI_CPU_IO_PROTOCOL_GUID \\r
{ \\r
0xB0732526, 0x38C8, 0x4b40, {0x88, 0x77, 0x61, 0xC7, 0xB0, 0x6A, 0xAC, 0x45 } \\r
}\r
\r
-typedef struct _EFI_CPU_IO_PROTOCOL EFI_CPU_IO_PROTOCOL;\r
-\r
-//\r
-// *******************************************************\r
-// EFI_CPU_IO_PROTOCOL_WIDTH\r
-// *******************************************************\r
-//\r
-typedef enum {\r
- EfiCpuIoWidthUint8,\r
- EfiCpuIoWidthUint16,\r
- EfiCpuIoWidthUint32,\r
- EfiCpuIoWidthUint64,\r
- EfiCpuIoWidthFifoUint8,\r
- EfiCpuIoWidthFifoUint16,\r
- EfiCpuIoWidthFifoUint32,\r
- EfiCpuIoWidthFifoUint64,\r
- EfiCpuIoWidthFillUint8,\r
- EfiCpuIoWidthFillUint16,\r
- EfiCpuIoWidthFillUint32,\r
- EfiCpuIoWidthFillUint64,\r
- EfiCpuIoWidthMaximum\r
-} EFI_CPU_IO_PROTOCOL_WIDTH;\r
-\r
-//\r
-// *******************************************************\r
-// EFI_CPU_IO_PROTOCOL_IO_MEM\r
-// *******************************************************\r
-//\r
-/**\r
- Enables a driver to access memory-mapped registers in the EFI system memory space.\r
- Or, Enables a driver to access registers in the EFI CPU I/O space.\r
-\r
- @param This A pointer to the EFI_CPU_IO_PROTOCOL instance.\r
- @param Width Signifies the width of the I/O or Memory operation.\r
- @param Address The base address of the I/O or Memoryoperation.\r
- @param Count The number of I/O or Memory operations to perform.\r
- The number of bytes moved is Width size * Count, starting at Address.\r
- @param Buffer For read operations, the destination buffer to store the results.\r
- For write operations, the source buffer from which to write data.\r
-\r
- @retval EFI_SUCCESS The data was read from or written to the EFI system.\r
- @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.\r
- @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.\r
- Or,The address range specified by Address, Width, and Count is not valid for this EFI system.\r
-\r
-**/\r
-typedef\r
-EFI_STATUS\r
-(EFIAPI *EFI_CPU_IO_PROTOCOL_IO_MEM)(\r
- IN EFI_CPU_IO_PROTOCOL *This,\r
- IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r
- IN UINT64 Address,\r
- IN UINTN Count,\r
- IN OUT VOID *Buffer\r
- );\r
-\r
-//\r
-// *******************************************************\r
-// EFI_CPU_IO_PROTOCOL_ACCESS\r
-// *******************************************************\r
-//\r
-typedef struct {\r
- EFI_CPU_IO_PROTOCOL_IO_MEM Read;\r
- EFI_CPU_IO_PROTOCOL_IO_MEM Write;\r
-} EFI_CPU_IO_PROTOCOL_ACCESS;\r
-\r
-//\r
-// *******************************************************\r
-// EFI_CPU_IO_PROTOCOL\r
-// *******************************************************\r
//\r
-/**\r
- Provides the basic memory and I/O interfaces that are used to abstract\r
- accesses to devices in a system.\r
-\r
- @param Mem.Read\r
- Allows reads from memory-mapped I/O space.\r
-\r
- @param Mem.Write\r
- Allows writes to memory-mapped I/O space.\r
-\r
- @param Io.Read\r
- Allows reads from I/O space.\r
-\r
- @param Io.Write\r
- Allows writes to I/O space.\r
-\r
-**/\r
-struct _EFI_CPU_IO_PROTOCOL {\r
- EFI_CPU_IO_PROTOCOL_ACCESS Mem;\r
- EFI_CPU_IO_PROTOCOL_ACCESS Io;\r
-};\r
+// Framework CPU IO protocol structure is the same as CPU IO 2 protocol defined in PI 1.2 spec. \r
+// However, there is a significant different between the Framework CPU I/O\r
+// Protocol and the PI 1.2 CPU I/O 2 Protocol. The Framework one is a runtime\r
+// protocol, which means it can be used by runtime drivers after ExitBootServices().\r
+// The PI one is not runtime safe, so it is a boot services only protocol and may\r
+// not be used by runtime drivers after ExitBootServices().\r
+// \r
+typedef EFI_CPU_IO2_PROTOCOL EFI_CPU_IO_PROTOCOL;\r
\r
extern EFI_GUID gEfiCpuIoProtocolGuid;\r
\r
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