StandaloneMmPkg: StandaloneMmMemLib: Extends support for X64 architecture

[mirror_edk2.git] / StandaloneMmPkg / Library / StandaloneMmMemLib / X86StandaloneMmMemLibInternal.c

diff --git a/StandaloneMmPkg/Library/StandaloneMmMemLib/X86StandaloneMmMemLibInternal.c b/StandaloneMmPkg/Library/StandaloneMmMemLib/X86StandaloneMmMemLibInternal.c
new file mode 100644 (file)
index 0000000..1a97854
--- /dev/null
+++ b/StandaloneMmPkg/Library/StandaloneMmMemLib/X86StandaloneMmMemLibInternal.c
@@ -0,0 +1,155 @@
+/** @file\r
+  Internal ARCH Specific file of MM memory check library.\r
+\r
+  MM memory check library implementation. This library consumes MM_ACCESS_PROTOCOL\r
+  to get MMRAM information. In order to use this library instance, the platform should produce\r
+  all MMRAM range via MM_ACCESS_PROTOCOL, including the range for firmware (like MM Core\r
+  and MM driver) and/or specific dedicated hardware.\r
+\r
+  Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>\r
+  Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.<BR>\r
+  Copyright (c) Microsoft Corporation.\r
+\r
+  SPDX-License-Identifier: BSD-2-Clause-Patent\r
+\r
+**/\r
+#include <PiMm.h>\r
+#include <Library/BaseLib.h>\r
+#include <Library/BaseMemoryLib.h>\r
+#include <Library/MemoryAllocationLib.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/HobLib.h>\r
+\r
+#include <Guid/MmCoreData.h>\r
+#include <Guid/MmramMemoryReserve.h>\r
+\r
+//\r
+// Maximum support address used to check input buffer\r
+//\r
+extern EFI_PHYSICAL_ADDRESS  mMmMemLibInternalMaximumSupportAddress;\r
+extern EFI_MMRAM_DESCRIPTOR *mMmMemLibInternalMmramRanges;\r
+extern UINTN                 mMmMemLibInternalMmramCount;\r
+\r
+/**\r
+  Calculate and save the maximum support address.\r
+\r
+**/\r
+VOID\r
+MmMemLibInternalCalculateMaximumSupportAddress (\r
+  VOID\r
+  )\r
+{\r
+  VOID         *Hob;\r
+  UINT32       RegEax;\r
+  UINT8        PhysicalAddressBits;\r
+\r
+  //\r
+  // Get physical address bits supported.\r
+  //\r
+  Hob = GetFirstHob (EFI_HOB_TYPE_CPU);\r
+  if (Hob != NULL) {\r
+    PhysicalAddressBits = ((EFI_HOB_CPU *) Hob)->SizeOfMemorySpace;\r
+  } else {\r
+    AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);\r
+    if (RegEax >= 0x80000008) {\r
+      AsmCpuid (0x80000008, &RegEax, NULL, NULL, NULL);\r
+      PhysicalAddressBits = (UINT8) RegEax;\r
+    } else {\r
+      PhysicalAddressBits = 36;\r
+    }\r
+  }\r
+  //\r
+  // IA-32e paging translates 48-bit linear addresses to 52-bit physical addresses.\r
+  //\r
+  ASSERT (PhysicalAddressBits <= 52);\r
+  if (PhysicalAddressBits > 48) {\r
+    PhysicalAddressBits = 48;\r
+  }\r
+\r
+  //\r
+  // Save the maximum support address in one global variable\r
+  //\r
+  mMmMemLibInternalMaximumSupportAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)(LShiftU64 (1, PhysicalAddressBits) - 1);\r
+  DEBUG ((DEBUG_INFO, "mMmMemLibInternalMaximumSupportAddress = 0x%lx\n", mMmMemLibInternalMaximumSupportAddress));\r
+}\r
+\r
+/**\r
+  Initialize cached Mmram Ranges from HOB.\r
+\r
+  @retval EFI_UNSUPPORTED   The routine is unable to extract MMRAM information.\r
+  @retval EFI_SUCCESS       MmRanges are populated successfully.\r
+\r
+**/\r
+EFI_STATUS\r
+MmMemLibInternalPopulateMmramRanges (\r
+  VOID\r
+  )\r
+{\r
+  VOID                            *HobStart;\r
+  EFI_HOB_GUID_TYPE               *GuidHob;\r
+  MM_CORE_DATA_HOB_DATA           *DataInHob;\r
+  MM_CORE_PRIVATE_DATA            *MmCorePrivateData;\r
+  EFI_HOB_GUID_TYPE               *MmramRangesHob;\r
+  EFI_MMRAM_HOB_DESCRIPTOR_BLOCK  *MmramRangesHobData;\r
+  EFI_MMRAM_DESCRIPTOR            *MmramDescriptors;\r
+\r
+  HobStart = GetHobList ();\r
+  DEBUG ((DEBUG_INFO, "%a - 0x%x\n", __FUNCTION__, HobStart));\r
+\r
+  //\r
+  // Extract MM Core Private context from the Hob. If absent search for\r
+  // a Hob containing the MMRAM ranges\r
+  //\r
+  GuidHob = GetNextGuidHob (&gMmCoreDataHobGuid, HobStart);\r
+  if (GuidHob == NULL) {\r
+    MmramRangesHob = GetFirstGuidHob (&gEfiMmPeiMmramMemoryReserveGuid);\r
+    if (MmramRangesHob == NULL) {\r
+      return EFI_UNSUPPORTED;\r
+    }\r
+\r
+    MmramRangesHobData = GET_GUID_HOB_DATA (MmramRangesHob);\r
+    if (MmramRangesHobData == NULL || MmramRangesHobData->Descriptor == NULL) {\r
+      return EFI_UNSUPPORTED;\r
+    }\r
+\r
+    mMmMemLibInternalMmramCount = MmramRangesHobData->NumberOfMmReservedRegions;\r
+    MmramDescriptors = MmramRangesHobData->Descriptor;\r
+  } else {\r
+    DataInHob = GET_GUID_HOB_DATA (GuidHob);\r
+    if (DataInHob == NULL) {\r
+      return EFI_UNSUPPORTED;\r
+    }\r
+\r
+    MmCorePrivateData = (MM_CORE_PRIVATE_DATA *) (UINTN) DataInHob->Address;\r
+    if (MmCorePrivateData == NULL || MmCorePrivateData->MmramRanges == 0) {\r
+      return EFI_UNSUPPORTED;\r
+    }\r
+\r
+    mMmMemLibInternalMmramCount = (UINTN) MmCorePrivateData->MmramRangeCount;\r
+    MmramDescriptors = (EFI_MMRAM_DESCRIPTOR *) (UINTN) MmCorePrivateData->MmramRanges;\r
+  }\r
+\r
+  mMmMemLibInternalMmramRanges = AllocatePool (mMmMemLibInternalMmramCount * sizeof (EFI_MMRAM_DESCRIPTOR));\r
+  if (mMmMemLibInternalMmramRanges) {\r
+    CopyMem (mMmMemLibInternalMmramRanges,\r
+             MmramDescriptors,\r
+             mMmMemLibInternalMmramCount * sizeof (EFI_MMRAM_DESCRIPTOR));\r
+  }\r
+\r
+  return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+  Deinitialize cached Mmram Ranges.\r
+\r
+**/\r
+VOID\r
+MmMemLibInternalFreeMmramRanges (\r
+  VOID\r
+  )\r
+{\r
+  if (mMmMemLibInternalMmramRanges != NULL) {\r
+    FreePool (mMmMemLibInternalMmramRanges);\r
+  }\r
+}\r
+\r