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MdeModulePkg: Add new driver to publish EDKII_PI_SMM_COMMUNICATION_REGION_TABLE.

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Add a driver to publish EDKII_PI_SMM_COMMUNICATION_REGION_TABLE, so that
other DXE driver can consume this table directly. NOTE: This is sample driver.
A platform may uses its own way to define default SMM communication buffer
region and publish information in its own
EDKII_PI_SMM_COMMUNICATION_REGION_TABLE.

This is designed to meet Microsoft WSMT table definition on FIXED_COMM_BUFFERS
requirement.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Feng, Tian <feng.tian@intel.com>
This commit is contained in:
Jiewen Yao
2016-04-22 15:04:45 +08:00
parent 1e01ea240e
commit 6e4e6ffda4
5 changed files with 204 additions and 0 deletions
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99
MdeModulePkg/Universal/SmmCommunicationBufferDxe/SmmCommunicationBufferDxe.c Normal file
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/** @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>
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
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#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 <Library/PcdLib.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;
}