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/** @file
SC Init Smm module for SC specific SMI handlers.
Copyright (c) 2013 - 2017, 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 "ScInitSmm.h"
#include <Library/MemoryAllocationLib.h>
GLOBAL_REMOVE_IF_UNREFERENCED EFI_SMM_SW_DISPATCH2_PROTOCOL *mSwDispatch;
GLOBAL_REMOVE_IF_UNREFERENCED EFI_SMM_SX_DISPATCH2_PROTOCOL *mSxDispatch;
GLOBAL_REMOVE_IF_UNREFERENCED SC_NVS_AREA *mScNvsArea;
GLOBAL_REMOVE_IF_UNREFERENCED UINT16 mAcpiBaseAddr;
GLOBAL_REMOVE_IF_UNREFERENCED SC_POLICY_HOB *mScPolicy;
GLOBAL_REMOVE_IF_UNREFERENCED SC_PCIE_CONFIG *mPcieRpConfig;
//
// The reserved MMIO range to be used in Sx handler
//
GLOBAL_REMOVE_IF_UNREFERENCED EFI_PHYSICAL_ADDRESS mResvMmioBaseAddr;
GLOBAL_REMOVE_IF_UNREFERENCED UINTN mResvMmioSize;
/**
PCH Sx entry SMI handler.
@param[in] Handle Handle of the callback
@param[in] Context The dispatch context
@param[in, out] CommBuffer A pointer to a collection of data in memory that will
be conveyed from a non-SMM environment into an SMM environment.
@param[in, out] CommBufferSize The size of the CommBuffer.
@retval EFI_SUCCESS
**/
EFI_STATUS
EFIAPI
PchSxHandler (
IN EFI_HANDLE Handle,
IN CONST VOID *Context OPTIONAL,
IN OUT VOID *CommBuffer OPTIONAL,
IN OUT UINTN *CommBufferSize OPTIONAL
)
{
return EFI_SUCCESS;
}
/**
Initialize PCH Sx entry SMI handler.
@param[in] ImageHandle Handle for the image of this driver
@retval None
**/
VOID
InitializeSxHandler (
IN EFI_HANDLE ImageHandle
)
{
EFI_SMM_SX_REGISTER_CONTEXT SxDispatchContext;
EFI_HANDLE SxDispatchHandle;
EFI_SLEEP_TYPE SxType;
EFI_STATUS Status;
DEBUG ((DEBUG_INFO, "InitializeSxHandler() Start\n"));
//
// Register the callback for S3/S4/S5 entry
//
SxDispatchContext.Phase = SxEntry;
for (SxType = SxS3; SxType <= SxS5; SxType++) {
SxDispatchContext.Type = SxType;
Status = mSxDispatch->Register (
mSxDispatch,
PchSxHandler,
&SxDispatchContext,
&SxDispatchHandle
);
ASSERT_EFI_ERROR (Status);
}
DEBUG ((DEBUG_INFO, "InitializeSxHandler() End\n"));
}
/**
Initializes the PCH SMM handler for for PCIE hot plug support
<b>PchInit SMM Module Entry Point</b>\n
- <b>Introduction</b>\n
The PchInitSmm module is a SMM driver that initializes the Intel Platform Controller Hub
SMM requirements and services. It consumes the PCH_POLICY_PROTOCOL for expected
configurations per policy.
- <b>Details</b>\n
This module provides SMI handlers to services PCIE HotPlug SMI, LinkActive SMI, and LinkEq SMI.
And also provides port 0x61 emulation support, GPIO Sx isolation requirement, and register BIOS WP
handler to process BIOSWP status.
- @pre
- @link _EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL @endlink
- This is to ensure that PCI MMIO and IO resource has been prepared and available for this driver to allocate.
- EFI_SMM_BASE2_PROTOCOL
- @link _EFI_SMM_IO_TRAP_DISPATCH2_PROTOCOL EFI_SMM_IO_TRAP_DISPATCH2_PROTOCOL @endlink
- @link _EFI_SMM_SX_DISPATCH2_PROTOCOL EFI_SMM_SX_DISPATCH2_PROTOCOL @endlink
- @link _EFI_SMM_CPU_PROTOCOL EFI_SMM_CPU_PROTOCOL @endlink
- @link _PCH_SMI_DISPATCH_PROTOCOL PCH_SMI_DISPATCH_PROTOCOL @endlink
- @link _PCH_PCIE_SMI_DISPATCH_PROTOCOL PCH_PCIE_SMI_DISPATCH_PROTOCOL @endlink
- @link _PCH_TCO_SMI_DISPATCH_PROTOCOL PCH_TCO_SMI_DISPATCH_PROTOCOL @endlink
- @link _PCH_ESPI_SMI_DISPATCH_PROTOCOL PCH_ESPI_SMI_DISPATCH_PROTOCOL @endlink
- SC_NVS_AREA_PROTOCOL
- @link PeiDxeSmmPchPlatformLib.h PeiDxeSmmPchPlatformLib @endlink library
- @link PeiDxeSmmPchPciExpressHelpersLib.h PchPciExpressHelpersLib @endlink library
- <b>References</b>\n
@link _PCH_POLICY PCH_POLICY_PROTOCOL @endlink.
- <b>Integration Checklists</b>\n
- Verify prerequisites are met. Porting Recommendations.
- No modification of this module should be necessary
- Any modification of this module should follow the PCH BIOS Specification and EDS
@param[in] ImageHandle Handle for the image of this driver
@param[in] SystemTable Pointer to the EFI System Table
@retval EFI_SUCCESS PCH SMM handler was installed
**/
EFI_STATUS
EFIAPI
ScInitSmmEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_PEI_HOB_POINTERS HobPtr;
SC_PCIE_CONFIG *PcieRpConfig;
DEBUG ((DEBUG_INFO, "ScInitSmmEntryPoint()\n"));
//
// Locate the SMM SW dispatch protocol
//
Status = gSmst->SmmLocateProtocol (
&gEfiSmmSwDispatch2ProtocolGuid,
NULL,
(VOID **) &mSwDispatch
);
ASSERT_EFI_ERROR (Status);
Status = gSmst->SmmLocateProtocol (
&gEfiSmmSxDispatch2ProtocolGuid,
NULL,
(VOID**) &mSxDispatch
);
ASSERT_EFI_ERROR (Status);
//
// Get Sc Policy Hob
//
HobPtr.Guid = GetFirstGuidHob (&gScPolicyHobGuid);
ASSERT (HobPtr.Guid != NULL);
mScPolicy = (SC_POLICY_HOB *) GET_GUID_HOB_DATA (HobPtr.Guid);
Status = GetConfigBlock ((VOID *) mScPolicy, &gPcieRpConfigGuid, (VOID *) &PcieRpConfig);
ASSERT_EFI_ERROR (Status);
mPcieRpConfig = AllocatePool(sizeof (SC_PCIE_CONFIG));
if (mPcieRpConfig != NULL) {
CopyMem (mPcieRpConfig, PcieRpConfig, sizeof (SC_PCIE_CONFIG));
}
InitializeSxHandler (ImageHandle);
Status = InitializeScPcieSmm (ImageHandle, SystemTable);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
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