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47 lines
1.9 KiB
C
47 lines
1.9 KiB
C
/** @file
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This code abstracts the CPU IO Protocol which installed by some platform or chipset-specific
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PEIM that abstracts the processor-visible I/O operations.
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Note: This is a runtime protocol and can be used by runtime drivers after ExitBootServices().
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It is different from the PI 1.2 CPU I/O 2 Protocol, which is a boot services only protocol
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and may not be used by runtime drivers after ExitBootServices().
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Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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@par Revision Reference:
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CPU IO Protocol is defined in Framework of EFI CPU IO Protocol Spec
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Version 0.9.
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**/
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#ifndef _CPUIO_H_
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#define _CPUIO_H_
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#include <Protocol/CpuIo2.h>
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#define EFI_CPU_IO_PROTOCOL_GUID \
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{ \
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0xB0732526, 0x38C8, 0x4b40, {0x88, 0x77, 0x61, 0xC7, 0xB0, 0x6A, 0xAC, 0x45 } \
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}
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//
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// Framework CPU IO protocol structure is the same as CPU IO 2 protocol defined in PI 1.2 spec.
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// However, there is a significant different between the Framework CPU I/O
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// Protocol and the PI 1.2 CPU I/O 2 Protocol. The Framework one is a runtime
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// protocol, which means it can be used by runtime drivers after ExitBootServices().
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// The PI one is not runtime safe, so it is a boot services only protocol and may
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// not be used by runtime drivers after ExitBootServices().
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//
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typedef EFI_CPU_IO2_PROTOCOL EFI_CPU_IO_PROTOCOL;
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extern EFI_GUID gEfiCpuIoProtocolGuid;
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#endif
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