diff options
Diffstat (limited to 'src/include/ipxe/efi/Protocol/CpuIo.h')
| -rw-r--r-- | src/include/ipxe/efi/Protocol/CpuIo.h | 120 |
1 files changed, 19 insertions, 101 deletions
diff --git a/src/include/ipxe/efi/Protocol/CpuIo.h b/src/include/ipxe/efi/Protocol/CpuIo.h index e3d96106d..532831702 100644 --- a/src/include/ipxe/efi/Protocol/CpuIo.h +++ b/src/include/ipxe/efi/Protocol/CpuIo.h @@ -2,126 +2,44 @@ This code abstracts the CPU IO Protocol which installed by some platform or chipset-specific PEIM that abstracts the processor-visible I/O operations. - Copyright (c) 2007, 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 + Note: This is a runtime protocol and can be used by runtime drivers after ExitBootServices(). + It is different from the PI 1.2 CPU I/O 2 Protocol, which is a boot services only protocol + and may not be used by runtime drivers after ExitBootServices(). - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR> +This program and the accompanying materials are licensed and made available under +the terms and conditions of the BSD License that accompanies this distribution. +The full text of the license may be found at +http://opensource.org/licenses/bsd-license.php. - Module Name: CpuIO.h +THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. @par Revision Reference: CPU IO Protocol is defined in Framework of EFI CPU IO Protocol Spec - Version 0.9 + Version 0.9. **/ #ifndef _CPUIO_H_ #define _CPUIO_H_ -#include <ipxe/efi/PiDxe.h> +#include <ipxe/efi/Protocol/CpuIo2.h> #define EFI_CPU_IO_PROTOCOL_GUID \ { \ 0xB0732526, 0x38C8, 0x4b40, {0x88, 0x77, 0x61, 0xC7, 0xB0, 0x6A, 0xAC, 0x45 } \ } -typedef struct _EFI_CPU_IO_PROTOCOL EFI_CPU_IO_PROTOCOL; - -// -// ******************************************************* -// EFI_CPU_IO_PROTOCOL_WIDTH -// ******************************************************* -// -typedef enum { - EfiCpuIoWidthUint8, - EfiCpuIoWidthUint16, - EfiCpuIoWidthUint32, - EfiCpuIoWidthUint64, - EfiCpuIoWidthFifoUint8, - EfiCpuIoWidthFifoUint16, - EfiCpuIoWidthFifoUint32, - EfiCpuIoWidthFifoUint64, - EfiCpuIoWidthFillUint8, - EfiCpuIoWidthFillUint16, - EfiCpuIoWidthFillUint32, - EfiCpuIoWidthFillUint64, - EfiCpuIoWidthMaximum -} EFI_CPU_IO_PROTOCOL_WIDTH; - -// -// ******************************************************* -// EFI_CPU_IO_PROTOCOL_IO_MEM -// ******************************************************* -// -/** - Enables a driver to access memory-mapped registers in the EFI system memory space. - Or, Enables a driver to access registers in the EFI CPU I/O space. - - @param This A pointer to the EFI_CPU_IO_PROTOCOL instance. - @param Width Signifies the width of the I/O or Memory operation. - @param Address The base address of the I/O or Memoryoperation. - @param Count The number of I/O or Memory operations to perform. - The number of bytes moved is Width size * Count, starting at Address. - @param 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 EFI system. - @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL. - @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width. - Or,The address range specified by Address, Width, and Count is not valid for this EFI system. - -**/ -typedef -EFI_STATUS -(EFIAPI *EFI_CPU_IO_PROTOCOL_IO_MEM)( - IN EFI_CPU_IO_PROTOCOL *This, - IN EFI_CPU_IO_PROTOCOL_WIDTH Width, - IN UINT64 Address, - IN UINTN Count, - IN OUT VOID *Buffer - ); - -// -// ******************************************************* -// EFI_CPU_IO_PROTOCOL_ACCESS -// ******************************************************* // -typedef struct { - EFI_CPU_IO_PROTOCOL_IO_MEM Read; - EFI_CPU_IO_PROTOCOL_IO_MEM Write; -} EFI_CPU_IO_PROTOCOL_ACCESS; - +// Framework CPU IO protocol structure is the same as CPU IO 2 protocol defined in PI 1.2 spec. +// However, there is a significant different between the Framework CPU I/O +// Protocol and the PI 1.2 CPU I/O 2 Protocol. The Framework one is a runtime +// protocol, which means it can be used by runtime drivers after ExitBootServices(). +// The PI one is not runtime safe, so it is a boot services only protocol and may +// not be used by runtime drivers after ExitBootServices(). // -// ******************************************************* -// EFI_CPU_IO_PROTOCOL -// ******************************************************* -// -/** - @par Protocol Description: - Provides the basic memory and I/O interfaces that are used to abstract - accesses to devices in a system. - - @param Mem.Read - Allows reads from memory-mapped I/O space. - - @param Mem.Write - Allows writes to memory-mapped I/O space. - - @param Io.Read - Allows reads from I/O space. - - @param Io.Write - Allows writes to I/O space. - -**/ -struct _EFI_CPU_IO_PROTOCOL { - EFI_CPU_IO_PROTOCOL_ACCESS Mem; - EFI_CPU_IO_PROTOCOL_ACCESS Io; -}; +typedef EFI_CPU_IO2_PROTOCOL EFI_CPU_IO_PROTOCOL; extern EFI_GUID gEfiCpuIoProtocolGuid; |