diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/MmCpuIo.h')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/MmCpuIo.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/MmCpuIo.h b/src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/MmCpuIo.h new file mode 100644 index 00000000..f0e7ec6e --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdePkg/Include/Protocol/MmCpuIo.h @@ -0,0 +1,90 @@ +/** @file + MM CPU I/O 2 protocol as defined in the PI 1.5 specification. + + This protocol provides CPU I/O and memory access within MM. + + Copyright (c) 2017, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#ifndef _MM_CPU_IO_H_ +#define _MM_CPU_IO_H_ + +#define EFI_MM_CPU_IO_PROTOCOL_GUID \ + { \ + 0x3242A9D8, 0xCE70, 0x4AA0, { 0x95, 0x5D, 0x5E, 0x7B, 0x14, 0x0D, 0xE4, 0xD2 } \ + } + +typedef struct _EFI_MM_CPU_IO_PROTOCOL EFI_MM_CPU_IO_PROTOCOL; + +/// +/// Width of the MM CPU I/O operations +/// +typedef enum { + MM_IO_UINT8 = 0, + MM_IO_UINT16 = 1, + MM_IO_UINT32 = 2, + MM_IO_UINT64 = 3 +} EFI_MM_IO_WIDTH; + +/** + Provides the basic memory and I/O interfaces used toabstract accesses to devices. + + The I/O operations are carried out exactly as requested. The caller is + responsible for any alignment and I/O width issues that the bus, device, + platform, or type of I/O might require. + + @param[in] This The EFI_MM_CPU_IO_PROTOCOL instance. + @param[in] Width Signifies the width of the I/O operations. + @param[in] Address The base address of the I/O operations. The caller is + responsible for aligning the Address if required. + @param[in] Count The number of I/O operations to perform. + @param[in,out] 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 device. + @retval EFI_UNSUPPORTED The Address is not valid for this system. + @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid. + @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack + of resources. +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_MM_CPU_IO)( + IN CONST EFI_MM_CPU_IO_PROTOCOL *This, + IN EFI_MM_IO_WIDTH Width, + IN UINT64 Address, + IN UINTN Count, + IN OUT VOID *Buffer + ); + +typedef struct { + /// + /// This service provides the various modalities of memory and I/O read. + /// + EFI_MM_CPU_IO Read; + /// + /// This service provides the various modalities of memory and I/O write. + /// + EFI_MM_CPU_IO Write; +} EFI_MM_IO_ACCESS; + +/// +/// MM CPU I/O Protocol provides CPU I/O and memory access within MM. +/// +struct _EFI_MM_CPU_IO_PROTOCOL { + /// + /// Allows reads and writes to memory-mapped I/O space. + /// + EFI_MM_IO_ACCESS Mem; + /// + /// Allows reads and writes to I/O space. + /// + EFI_MM_IO_ACCESS Io; +}; + +extern EFI_GUID gEfiMmCpuIoProtocolGuid; + +#endif |