mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-25 16:37:42 +01:00
58 lines
2.4 KiB
C
58 lines
2.4 KiB
C
/** @file
|
|
|
|
Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#ifndef _PI_SMM_COMMUNICATION_REGION_TABLE_H_
|
|
#define _PI_SMM_COMMUNICATION_REGION_TABLE_H_
|
|
|
|
#define EDKII_PI_SMM_COMMUNICATION_REGION_TABLE_GUID {\
|
|
0x4e28ca50, 0xd582, 0x44ac, {0xa1, 0x1f, 0xe3, 0xd5, 0x65, 0x26, 0xdb, 0x34} \
|
|
}
|
|
|
|
//
|
|
// This table to declare the generic SMM communication buffer location.
|
|
// If this table is present, it means the SMM communication buffer is restricted to
|
|
// EfiReservedMemoryType, EfiACPIMemoryNVS, or EfiRuntimeServicesData.
|
|
//
|
|
// This table is installed to UEFI configuration table by generic driver
|
|
// or platform driver, at early DXE phase.
|
|
//
|
|
// The EFI_MEMORY_DESCRIPTOR entry must contain at least one entry.
|
|
// The entries must be normal memory region in EfiReservedMemoryType, EfiACPIMemoryNVS,
|
|
// or EfiRuntimeServicesData.
|
|
// If the Entry.Type is EfiConventionalMemory, it means this entry is free to use.
|
|
// If the Entry.Type is other, it means this entry is occupied.
|
|
//
|
|
// Any non-SMM component may put communication data there, then use
|
|
// UEFI defined SMM Communication ACPI Table, or PI defined EFI_SMM_COMMUNICATION_PROTOCOL
|
|
// to communicate with SMI handler. The process is:
|
|
// 1) Find an entry whose type is EfiConventional.
|
|
// 2) Change type to be EfiReservedMemoryType before use.
|
|
// 3) Use it.
|
|
// 4) Restore type be EfiConventional.
|
|
// The step 2) must be performed as an atomic transaction, if there might be conflict during runtime.
|
|
// For example, on IA-32/x64 platforms, this can be done using the CMPXCHG CPU instruction.
|
|
// If there is guarantee on no conflict during boot time, these steps can be skipped.
|
|
// For example, DXE, UEFI driver and UEFI application runs in sequence.
|
|
//
|
|
// For example, FPDT driver can use this communication buffer to get SMM
|
|
// performance data in SMM. Profile driver can use this communication buffer
|
|
// to get SMM profile data in SMM.
|
|
//
|
|
typedef struct {
|
|
UINT32 Version;
|
|
UINT32 NumberOfEntries;
|
|
UINT32 DescriptorSize;
|
|
UINT32 Reserved;
|
|
//EFI_MEMORY_DESCRIPTOR Entry[1];
|
|
} EDKII_PI_SMM_COMMUNICATION_REGION_TABLE;
|
|
|
|
#define EDKII_PI_SMM_COMMUNICATION_REGION_TABLE_VERSION 0x00000001
|
|
|
|
extern EFI_GUID gEdkiiPiSmmCommunicationRegionTableGuid;
|
|
|
|
#endif
|