mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-24 11:45:27 +01:00
93 lines
3.8 KiB
C
93 lines
3.8 KiB
C
/** @file
|
|
A driver allocates common SMM communication buffer in EfiReservedMemoryType.
|
|
|
|
This driver allocates common SMM communication buffer in EfiReservedMemoryType,
|
|
then it publishes the information to EFI configuration table with
|
|
gEdkiiPiSmmCommunicationRegionTableGuid.
|
|
Any other driver or application can get the table and know the common
|
|
communication buffer.
|
|
|
|
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include <PiDxe.h>
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
#include <Library/UefiRuntimeServicesTableLib.h>
|
|
#include <Library/BaseLib.h>
|
|
#include <Library/BaseMemoryLib.h>
|
|
#include <Library/MemoryAllocationLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/UefiLib.h>
|
|
#include <Guid/PiSmmCommunicationRegionTable.h>
|
|
|
|
#define DEFAULT_COMMON_PI_SMM_COMMUNIATION_REGION_PAGES 4
|
|
|
|
/**
|
|
Entry Point for SMM communication buffer driver.
|
|
|
|
@param[in] ImageHandle Image handle of this driver.
|
|
@param[in] SystemTable A Pointer to the EFI System Table.
|
|
|
|
@retval EFI_SUCEESS
|
|
@return Others Some error occurs.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
SmmCommunicationBufferEntryPoint (
|
|
IN EFI_HANDLE ImageHandle,
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINT32 DescriptorSize;
|
|
EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *PiSmmCommunicationRegionTable;
|
|
EFI_MEMORY_DESCRIPTOR *Entry;
|
|
|
|
DescriptorSize = sizeof(EFI_MEMORY_DESCRIPTOR);
|
|
//
|
|
// Make sure Size != sizeof(EFI_MEMORY_DESCRIPTOR). This will
|
|
// prevent people from having pointer math bugs in their code.
|
|
// now you have to use *DescriptorSize to make things work.
|
|
//
|
|
DescriptorSize += sizeof(UINT64) - (DescriptorSize % sizeof (UINT64));
|
|
|
|
//
|
|
// Allocate and fill PiSmmCommunicationRegionTable
|
|
//
|
|
PiSmmCommunicationRegionTable = AllocateReservedPool (sizeof(EDKII_PI_SMM_COMMUNICATION_REGION_TABLE) + DescriptorSize);
|
|
ASSERT(PiSmmCommunicationRegionTable != NULL);
|
|
ZeroMem (PiSmmCommunicationRegionTable, sizeof(EDKII_PI_SMM_COMMUNICATION_REGION_TABLE) + DescriptorSize);
|
|
|
|
PiSmmCommunicationRegionTable->Version = EDKII_PI_SMM_COMMUNICATION_REGION_TABLE_VERSION;
|
|
PiSmmCommunicationRegionTable->NumberOfEntries = 1;
|
|
PiSmmCommunicationRegionTable->DescriptorSize = DescriptorSize;
|
|
Entry = (EFI_MEMORY_DESCRIPTOR *)(PiSmmCommunicationRegionTable + 1);
|
|
Entry->Type = EfiConventionalMemory;
|
|
Entry->PhysicalStart = (EFI_PHYSICAL_ADDRESS)(UINTN)AllocateReservedPages (DEFAULT_COMMON_PI_SMM_COMMUNIATION_REGION_PAGES);
|
|
ASSERT(Entry->PhysicalStart != 0);
|
|
Entry->VirtualStart = 0;
|
|
Entry->NumberOfPages = DEFAULT_COMMON_PI_SMM_COMMUNIATION_REGION_PAGES;
|
|
Entry->Attribute = 0;
|
|
|
|
DEBUG ((EFI_D_INFO, "PiSmmCommunicationRegionTable:(0x%x)\n", PiSmmCommunicationRegionTable));
|
|
DEBUG ((EFI_D_INFO, " Version - 0x%x\n", PiSmmCommunicationRegionTable->Version));
|
|
DEBUG ((EFI_D_INFO, " NumberOfEntries - 0x%x\n", PiSmmCommunicationRegionTable->NumberOfEntries));
|
|
DEBUG ((EFI_D_INFO, " DescriptorSize - 0x%x\n", PiSmmCommunicationRegionTable->DescriptorSize));
|
|
DEBUG ((EFI_D_INFO, "Entry:(0x%x)\n", Entry));
|
|
DEBUG ((EFI_D_INFO, " Type - 0x%x\n", Entry->Type));
|
|
DEBUG ((EFI_D_INFO, " PhysicalStart - 0x%lx\n", Entry->PhysicalStart));
|
|
DEBUG ((EFI_D_INFO, " VirtualStart - 0x%lx\n", Entry->VirtualStart));
|
|
DEBUG ((EFI_D_INFO, " NumberOfPages - 0x%lx\n", Entry->NumberOfPages));
|
|
DEBUG ((EFI_D_INFO, " Attribute - 0x%lx\n", Entry->Attribute));
|
|
|
|
//
|
|
// Publish this table, so that other driver can use the buffer.
|
|
//
|
|
Status = gBS->InstallConfigurationTable (&gEdkiiPiSmmCommunicationRegionTableGuid, PiSmmCommunicationRegionTable);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
return Status;
|
|
}
|