QuarkSocPkg/SmmAccessDxe: Set region to UC on SMRAM close

[mirror_edk2.git] / QuarkSocPkg / QuarkNorthCluster / Smm / Dxe / SmmAccessDxe / SmmAccessDriver.c

/** @file\r
This is the driver that publishes the SMM Access Protocol\r
instance for the Tylersburg chipset.\r
\r
Copyright (c) 2013-2019 Intel Corporation.\r
\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "SmmAccessDriver.h"\r
\r
\r
\r
SMM_ACCESS_PRIVATE_DATA  mSmmAccess;\r
\r
VOID\r
SmmAccessOnBoot (\r
  IN EFI_EVENT                          Event,\r
  IN VOID                               *Context\r
);\r
\r
EFI_STATUS\r
EFIAPI\r
SmmAccessDriverEntryPoint (\r
  IN EFI_HANDLE         ImageHandle,\r
  IN EFI_SYSTEM_TABLE   *SystemTable\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Installs an SMM Access Protocol.\r
\r
Arguments:\r
\r
  ImageHandle  -  Handle for the image of this driver.\r
  SystemTable  -  Pointer to the EFI System Table.\r
\r
Returns:\r
\r
  EFI_SUCCESS     -  Protocol successfully started and installed.\r
  EFI_UNSUPPORTED -  Protocol can't be started.\r
  EFI_NOT_FOUND   -  Protocol not found.\r
--*/\r
{\r
\r
  EFI_STATUS                      Status;\r
  EFI_EVENT                       BootEvent;\r
  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;\r
  UINTN                           Index;\r
  EFI_SMRAM_HOB_DESCRIPTOR_BLOCK  *DescriptorBlock;\r
  EFI_HOB_GUID_TYPE               *GuidHob;\r
\r
\r
  //\r
  // Initialize private data\r
  //\r
  ZeroMem (&mSmmAccess, sizeof (mSmmAccess));\r
\r
  Status = gBS->LocateProtocol (\r
                  &gEfiPciRootBridgeIoProtocolGuid,\r
                  NULL,\r
                  (VOID **) &PciRootBridgeIo\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  //\r
  // Build SMM related information\r
  //\r
  mSmmAccess.Signature        = SMM_ACCESS_PRIVATE_DATA_SIGNATURE;\r
  mSmmAccess.Handle           = NULL;\r
  mSmmAccess.PciRootBridgeIo  = PciRootBridgeIo;\r
\r
  //\r
  // Get Hob list\r
  //\r
  GuidHob    = GetFirstGuidHob (&gEfiSmmPeiSmramMemoryReserveGuid);\r
  DescriptorBlock = GET_GUID_HOB_DATA (GuidHob);\r
  ASSERT (DescriptorBlock);\r
\r
\r
  //\r
  // Get CPU Max bus number\r
  //\r
  mSmmAccess.MaxBusNumber         = PCI_BUS_NUMBER_QNC;\r
  for (Index = 0; Index < MAX_CPU_SOCKET; Index++) {\r
    mSmmAccess.SocketPopulated[Index] = TRUE;\r
  }\r
\r
  //\r
  // Use the hob to publish SMRAM capabilities\r
  //\r
  ASSERT (DescriptorBlock->NumberOfSmmReservedRegions <= MAX_SMRAM_RANGES);\r
  for (Index = 0; Index < DescriptorBlock->NumberOfSmmReservedRegions; Index++) {\r
    mSmmAccess.SmramDesc[Index].PhysicalStart = DescriptorBlock->Descriptor[Index].PhysicalStart;\r
    mSmmAccess.SmramDesc[Index].CpuStart      = DescriptorBlock->Descriptor[Index].CpuStart;\r
    mSmmAccess.SmramDesc[Index].PhysicalSize  = DescriptorBlock->Descriptor[Index].PhysicalSize;\r
    mSmmAccess.SmramDesc[Index].RegionState   = DescriptorBlock->Descriptor[Index].RegionState;\r
    DEBUG ((EFI_D_INFO, "SM RAM index[%d] startaddr:%08X Size :%08X\n", Index, mSmmAccess.SmramDesc[Index].CpuStart,\r
      mSmmAccess.SmramDesc[Index].PhysicalSize));\r
  }\r
\r
  mSmmAccess.NumberRegions              = Index;\r
  mSmmAccess.SmmAccess.Open             = Open;\r
  mSmmAccess.SmmAccess.Close            = Close;\r
  mSmmAccess.SmmAccess.Lock             = Lock;\r
  mSmmAccess.SmmAccess.GetCapabilities  = GetCapabilities;\r
  mSmmAccess.SmmAccess.LockState        = FALSE;\r
  mSmmAccess.SmmAccess.OpenState        = FALSE;\r
  mSmmAccess.SMMRegionState             = EFI_SMRAM_CLOSED;\r
\r
  //\r
  // Install our protocol interfaces on the device's handle\r
  //\r
  Status = gBS->InstallMultipleProtocolInterfaces (\r
                &mSmmAccess.Handle,\r
                &gEfiSmmAccess2ProtocolGuid,\r
                &mSmmAccess.SmmAccess,\r
                NULL\r
                );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  DEBUG ((EFI_D_INFO, "SMM  Base: %08X\n", (UINT32)(mSmmAccess.SmramDesc[mSmmAccess.NumberRegions-1].PhysicalStart)));\r
  DEBUG ((EFI_D_INFO, "SMM  Size: %08X\n", (UINT32)(mSmmAccess.SmramDesc[mSmmAccess.NumberRegions-1].PhysicalSize)));\r
\r
  mSmmAccess.TsegSize = (UINT8)(mSmmAccess.SmramDesc[mSmmAccess.NumberRegions-1].PhysicalSize);\r
  //\r
  // T Seg setting done in QPI RC\r
  //\r
\r
  //\r
  // Prior ReadyToBoot, lock CSEG\r
  //\r
  Status = EfiCreateEventReadyToBootEx(\r
           TPL_NOTIFY,\r
           SmmAccessOnBoot,\r
           NULL,\r
           &BootEvent );\r
  ASSERT (!EFI_ERROR (Status));\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
Open (\r
  IN EFI_SMM_ACCESS2_PROTOCOL    *This\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  This routine accepts a request to "open" a region of SMRAM.  The\r
  region could be legacy ABSEG, HSEG, or TSEG near top of physical memory.\r
  The use of "open" means that the memory is visible from all boot-service\r
  and SMM agents.\r
\r
Arguments:\r
\r
  This             -  Pointer to the SMM Access Interface.\r
  DescriptorIndex  -  Region of SMRAM to Open.\r
\r
Returns:\r
\r
  EFI_SUCCESS            -  The region was successfully opened.\r
  EFI_DEVICE_ERROR       -  The region could not be opened because locked by\r
                            chipset.\r
  EFI_INVALID_PARAMETER  -  The descriptor index was out of bounds.\r
\r
--*/\r
{\r
  SMM_ACCESS_PRIVATE_DATA *SmmAccess;\r
\r
  SmmAccess = SMM_ACCESS_PRIVATE_DATA_FROM_THIS (This);\r
\r
  if (mSmmAccess.SMMRegionState & EFI_SMRAM_LOCKED) {\r
    DEBUG ((EFI_D_ERROR, "Cannot open a locked SMRAM region\n"));\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  //\r
  // Open TSEG\r
  //\r
  if (!QNCOpenSmramRegion ()) {\r
    mSmmAccess.SMMRegionState |= EFI_SMRAM_LOCKED;\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  mSmmAccess.SMMRegionState &= ~(EFI_SMRAM_CLOSED | EFI_ALLOCATED);\r
  SyncRegionState2SmramDesc(FALSE, (UINT64)(UINTN)(~(EFI_SMRAM_CLOSED | EFI_ALLOCATED)));\r
  mSmmAccess.SMMRegionState |= EFI_SMRAM_OPEN;\r
  SyncRegionState2SmramDesc(TRUE, EFI_SMRAM_OPEN);\r
  SmmAccess->SmmAccess.OpenState = TRUE;\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
Close (\r
  IN EFI_SMM_ACCESS2_PROTOCOL *This\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  This routine accepts a request to "close" a region of SMRAM.  This is valid for\r
  compatible SMRAM region.\r
\r
Arguments:\r
\r
  This             -  Pointer to the SMM Access Interface.\r
  DescriptorIndex  -  Region of SMRAM to Close.\r
\r
Returns:\r
\r
  EFI_SUCCESS            -  The region was successfully closed.\r
  EFI_DEVICE_ERROR       -  The region could not be closed because locked by\r
                            chipset.\r
  EFI_INVALID_PARAMETER  -  The descriptor index was out of bounds.\r
\r
--*/\r
{\r
  EFI_STATUS              Status;\r
  SMM_ACCESS_PRIVATE_DATA *SmmAccess;\r
  BOOLEAN                 OpenState;\r
  UINTN                   Index;\r
\r
  SmmAccess     = SMM_ACCESS_PRIVATE_DATA_FROM_THIS (This);\r
\r
  if (mSmmAccess.SMMRegionState & EFI_SMRAM_LOCKED) {\r
    //\r
    // Cannot close a "locked" region\r
    //\r
    DEBUG ((EFI_D_WARN, "Cannot close the locked SMRAM Region\n"));\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  if (mSmmAccess.SMMRegionState & EFI_SMRAM_CLOSED) {\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  //\r
  // Reset SMRAM cacheability to UC\r
  //\r
  for (Index = 0; Index < mSmmAccess.NumberRegions; Index++) {\r
    DEBUG ((DEBUG_INFO, "SmmAccess->Close: Set to UC Base=%016lx  Size=%016lx\n", SmmAccess->SmramDesc[Index].CpuStart, SmmAccess->SmramDesc[Index].PhysicalSize));\r
    Status = gDS->SetMemorySpaceAttributes(\r
                    SmmAccess->SmramDesc[Index].CpuStart,\r
                    SmmAccess->SmramDesc[Index].PhysicalSize,\r
                    EFI_MEMORY_UC\r
                    );\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((DEBUG_WARN, "SmmAccess: Failed to reset SMRAM window to EFI_MEMORY_UC\n"));\r
    }\r
  }\r
\r
  //\r
  // Close TSEG\r
  //\r
  if (!QNCCloseSmramRegion ()) {\r
    mSmmAccess.SMMRegionState |= EFI_SMRAM_LOCKED;\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  mSmmAccess.SMMRegionState &= ~EFI_SMRAM_OPEN;\r
  SyncRegionState2SmramDesc(FALSE, (UINT64)(UINTN)(~EFI_SMRAM_OPEN));\r
  mSmmAccess.SMMRegionState |= (EFI_SMRAM_CLOSED | EFI_ALLOCATED);\r
  SyncRegionState2SmramDesc(TRUE, EFI_SMRAM_CLOSED | EFI_ALLOCATED);\r
\r
  //\r
  // Find out if any regions are still open\r
  //\r
  OpenState = FALSE;\r
  for (Index = 0; Index < mSmmAccess.NumberRegions; Index++) {\r
    if ((SmmAccess->SmramDesc[Index].RegionState & EFI_SMRAM_OPEN) == EFI_SMRAM_OPEN) {\r
      OpenState = TRUE;\r
    }\r
  }\r
\r
  SmmAccess->SmmAccess.OpenState = OpenState;\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
Lock (\r
  IN EFI_SMM_ACCESS2_PROTOCOL   *This\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  This routine accepts a request to "lock" SMRAM.  The\r
  region could be legacy AB or TSEG near top of physical memory.\r
  The use of "lock" means that the memory can no longer be opened\r
  to BS state..\r
\r
Arguments:\r
\r
  This             -  Pointer to the SMM Access Interface.\r
  DescriptorIndex  -  Region of SMRAM to Lock.\r
\r
Returns:\r
\r
  EFI_SUCCESS            -  The region was successfully locked.\r
  EFI_DEVICE_ERROR       -  The region could not be locked because at least\r
                            one range is still open.\r
  EFI_INVALID_PARAMETER  -  The descriptor index was out of bounds.\r
\r
--*/\r
{\r
  SMM_ACCESS_PRIVATE_DATA *SmmAccess;\r
\r
  SmmAccess = SMM_ACCESS_PRIVATE_DATA_FROM_THIS (This);\r
\r
  if (SmmAccess->SmmAccess.OpenState) {\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  mSmmAccess.SMMRegionState |= EFI_SMRAM_LOCKED;\r
  SyncRegionState2SmramDesc(TRUE, EFI_SMRAM_LOCKED);\r
  SmmAccess->SmmAccess.LockState                     = TRUE;\r
\r
  //\r
  // Lock TSEG\r
  //\r
  QNCLockSmramRegion ();\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
GetCapabilities (\r
  IN CONST  EFI_SMM_ACCESS2_PROTOCOL *This,\r
  IN OUT UINTN                       *SmramMapSize,\r
  IN OUT EFI_SMRAM_DESCRIPTOR        *SmramMap\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  This routine services a user request to discover the SMRAM\r
  capabilities of this platform.  This will report the possible\r
  ranges that are possible for SMRAM access, based upon the\r
  memory controller capabilities.\r
\r
Arguments:\r
\r
  This          -  Pointer to the SMRAM Access Interface.\r
  SmramMapSize  -  Pointer to the variable containing size of the\r
                   buffer to contain the description information.\r
  SmramMap      -  Buffer containing the data describing the Smram\r
                   region descriptors.\r
Returns:\r
\r
  EFI_BUFFER_TOO_SMALL  -  The user did not provide a sufficient buffer.\r
  EFI_SUCCESS           -  The user provided a sufficiently-sized buffer.\r
\r
--*/\r
{\r
  EFI_STATUS                Status;\r
  SMM_ACCESS_PRIVATE_DATA  *SmmAccess;\r
  UINTN                     BufferSize;\r
\r
  SmmAccess           = SMM_ACCESS_PRIVATE_DATA_FROM_THIS (This);\r
  BufferSize          = SmmAccess->NumberRegions * sizeof (EFI_SMRAM_DESCRIPTOR);\r
\r
  if (*SmramMapSize < BufferSize) {\r
    Status = EFI_BUFFER_TOO_SMALL;\r
  } else {\r
    CopyMem (SmramMap, SmmAccess->SmramDesc, *SmramMapSize);\r
    Status = EFI_SUCCESS;\r
  }\r
  *SmramMapSize = BufferSize;\r
\r
  return Status;\r
}\r
\r
VOID\r
SmmAccessOnBoot (\r
  IN EFI_EVENT                          Event,\r
  IN VOID                               *Context\r
)\r
{\r
\r
}\r
VOID\r
SyncRegionState2SmramDesc(\r
  IN BOOLEAN  OrAnd,\r
  IN UINT64   Value\r
  )\r
{\r
  UINT32 Index;\r
\r
  for (Index = 0; Index < mSmmAccess.NumberRegions; Index++) {\r
    if (OrAnd) {\r
      mSmmAccess.SmramDesc[Index].RegionState |= Value;\r
    } else {\r
      mSmmAccess.SmramDesc[Index].RegionState &= Value;\r
    }\r
  }\r
}\r