/** @file\r
\r
-Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
\r
-This program and the accompanying materials\r
-are licensed and made available under the terms and conditions\r
-of the BSD License which accompanies this distribution. The\r
-full text of the license may be found at\r
-http://opensource.org/licenses/bsd-license.php\r
-\r
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
EFI_PHYSICAL_ADDRESS mReserveSmbiosEntryPoint = 0;\r
EFI_PHYSICAL_ADDRESS mStructureTableAddress = 0;\r
UINTN mStructureTablePages = 0;\r
+BOOLEAN mEndOfDxe = FALSE;\r
\r
/**\r
- Do an AllocatePages () of type AllocateMaxAddress for EfiBootServicesCode\r
- memory.\r
+ Allocate memory for legacy usage. The memory is executable.\r
\r
- @param AllocateType Allocated Legacy Memory Type\r
+ @param AllocateType The type of allocation to perform.\r
+ @param MemoryType The type of memory to allocate.\r
@param StartPageAddress Start address of range\r
@param Pages Number of pages to allocate\r
@param Result Result of allocation\r
\r
- @retval EFI_SUCCESS Legacy16 code loaded\r
- @retval Other No protocol installed, unload driver.\r
+ @retval EFI_SUCCESS Legacy memory is allocated successfully.\r
+ @retval Other Legacy memory is not allocated.\r
\r
**/\r
EFI_STATUS\r
AllocateLegacyMemory (\r
IN EFI_ALLOCATE_TYPE AllocateType,\r
+ IN EFI_MEMORY_TYPE MemoryType,\r
IN EFI_PHYSICAL_ADDRESS StartPageAddress,\r
IN UINTN Pages,\r
OUT EFI_PHYSICAL_ADDRESS *Result\r
)\r
{\r
- EFI_STATUS Status;\r
- EFI_PHYSICAL_ADDRESS MemPage;\r
+ EFI_STATUS Status;\r
+ EFI_PHYSICAL_ADDRESS MemPage;\r
+ EFI_GCD_MEMORY_SPACE_DESCRIPTOR MemDesc;\r
\r
//\r
// Allocate Pages of memory less <= StartPageAddress\r
MemPage = (EFI_PHYSICAL_ADDRESS) (UINTN) StartPageAddress;\r
Status = gBS->AllocatePages (\r
AllocateType,\r
- EfiBootServicesCode,\r
+ MemoryType,\r
Pages,\r
&MemPage\r
);\r
// Do not ASSERT on Status error but let caller decide since some cases\r
// memory is already taken but that is ok.\r
//\r
+ if (!EFI_ERROR (Status)) {\r
+ if (MemoryType != EfiBootServicesCode) {\r
+ //\r
+ // Make sure that the buffer can be used to store code.\r
+ //\r
+ Status = gDS->GetMemorySpaceDescriptor (MemPage, &MemDesc);\r
+ if (!EFI_ERROR (Status) && (MemDesc.Attributes & EFI_MEMORY_XP) != 0) {\r
+ Status = gDS->SetMemorySpaceAttributes (\r
+ MemPage,\r
+ EFI_PAGES_TO_SIZE (Pages),\r
+ MemDesc.Attributes & (~EFI_MEMORY_XP)\r
+ );\r
+ }\r
+ if (EFI_ERROR (Status)) {\r
+ gBS->FreePages (MemPage, Pages);\r
+ }\r
+ }\r
+ }\r
+\r
if (!EFI_ERROR (Status)) {\r
*Result = (EFI_PHYSICAL_ADDRESS) (UINTN) MemPage;\r
}\r
- //\r
- // If reach here the status = EFI_SUCCESS\r
- //\r
+\r
return Status;\r
}\r
\r
if (EFI_ERROR (Status)) {\r
//\r
// Bugbug: need to figure out whether C/D/E/F segment should be marked as reserved memory.\r
- // \r
+ //\r
DEBUG ((DEBUG_ERROR, "Failed to allocate the C/D/E/F segment Status = %r", Status));\r
}\r
}\r
Private->Legacy8259->GetMask(Private->Legacy8259, &OldMask, NULL, NULL, NULL);\r
NewMask = 0xFFFF;\r
Private->Legacy8259->SetMask(Private->Legacy8259, &NewMask, NULL, NULL, NULL);\r
- \r
+\r
//\r
// Call into Legacy16 code to do an INIT\r
//\r
// Restore original legacy interrupt mask value\r
//\r
Private->Legacy8259->SetMask(Private->Legacy8259, &OldMask, NULL, NULL, NULL);\r
- \r
+\r
if (Regs.X.AX != 0) {\r
return EFI_DEVICE_ERROR;\r
}\r
UINT16 PciInterfaceVersion;\r
\r
PciInterfaceVersion = 0;\r
- \r
+\r
Reg.X.AX = 0xB101;\r
Reg.E.EDI = 0;\r
\r
{\r
EFI_STATUS Status;\r
SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure;\r
- \r
+\r
//\r
// Get SMBIOS table from EFI configuration table\r
//\r
if ((EFI_ERROR (Status)) || (mRuntimeSmbiosEntryPoint == NULL)) {\r
return;\r
}\r
- \r
+\r
EntryPointStructure = (SMBIOS_TABLE_ENTRY_POINT *) mRuntimeSmbiosEntryPoint;\r
\r
//\r
}\r
DEBUG ((EFI_D_INFO, "Allocate memory for Smbios Entry Point Structure\n"));\r
}\r
- \r
- if ((mStructureTableAddress != 0) && \r
+\r
+ if ((mStructureTableAddress != 0) &&\r
(mStructureTablePages < EFI_SIZE_TO_PAGES ((UINT32)EntryPointStructure->TableLength))) {\r
//\r
// If original buffer is not enough for the new SMBIOS table, free original buffer and re-allocate\r
mStructureTablePages = 0;\r
DEBUG ((EFI_D_INFO, "Original size is not enough. Re-allocate the memory.\n"));\r
}\r
- \r
+\r
if (mStructureTableAddress == 0) {\r
//\r
// Allocate reserved memory below 4GB.\r
);\r
if (EFI_ERROR (Status)) {\r
gBS->FreePages (\r
- mReserveSmbiosEntryPoint, \r
+ mReserveSmbiosEntryPoint,\r
EFI_SIZE_TO_PAGES ((UINTN) (EntryPointStructure->EntryPointLength))\r
);\r
mReserveSmbiosEntryPoint = 0;\r
}\r
}\r
\r
+/**\r
+ Callback function to toggle EndOfDxe status. NULL pointer detection needs\r
+ this status to decide if it's necessary to change attributes of page 0.\r
+\r
+ @param Event Event whose notification function is being invoked.\r
+ @param Context The pointer to the notification function's context,\r
+ which is implementation-dependent.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+ToggleEndOfDxeStatus (\r
+ IN EFI_EVENT Event,\r
+ IN VOID *Context\r
+ )\r
+{\r
+ mEndOfDxe = TRUE;\r
+ return;\r
+}\r
+\r
/**\r
Install Driver to produce Legacy BIOS protocol.\r
\r
UINT64 Length;\r
UINT8 *SecureBoot;\r
EFI_EVENT InstallSmbiosEvent;\r
+ EFI_EVENT EndOfDxeEvent;\r
\r
//\r
// Load this driver's image to memory\r
FreePool (SecureBoot);\r
return EFI_SECURITY_VIOLATION;\r
}\r
- \r
+\r
if (SecureBoot != NULL) {\r
FreePool (SecureBoot);\r
}\r
//\r
AllocateLegacyMemory (\r
AllocateAddress,\r
+ EfiReservedMemoryType,\r
0,\r
1,\r
&MemoryAddress\r
// Initialize region from 0x0000 to 4k. This initializes interrupt vector\r
// range.\r
//\r
- gBS->SetMem ((VOID *) ClearPtr, 0x400, INITIAL_VALUE_BELOW_1K);\r
- ZeroMem ((VOID *) ((UINTN)ClearPtr + 0x400), 0xC00);\r
+ ACCESS_PAGE0_CODE (\r
+ gBS->SetMem ((VOID *) ClearPtr, 0x400, INITIAL_VALUE_BELOW_1K);\r
+ ZeroMem ((VOID *) ((UINTN)ClearPtr + 0x400), 0xC00);\r
+ );\r
\r
//\r
// Allocate pages for OPROM usage\r
\r
Status = AllocateLegacyMemory (\r
AllocateAddress,\r
+ EfiReservedMemoryType,\r
CONVENTIONAL_MEMORY_TOP - MemorySize,\r
EFI_SIZE_TO_PAGES (MemorySize),\r
&MemoryAddress\r
for (MemStart = MemoryAddress; MemStart < MemoryAddress + MemorySize; MemStart += 0x1000) {\r
Status = AllocateLegacyMemory (\r
AllocateAddress,\r
+ EfiBootServicesCode,\r
MemStart,\r
1,\r
&StartAddress\r
// Allocate low PMM memory and zero it out\r
//\r
MemorySize = PcdGet32 (PcdLowPmmMemorySize);\r
- ASSERT ((MemorySize & 0xFFF) == 0); \r
+ ASSERT ((MemorySize & 0xFFF) == 0);\r
Status = AllocateLegacyMemory (\r
AllocateMaxAddress,\r
+ EfiBootServicesCode,\r
CONVENTIONAL_MEMORY_TOP,\r
EFI_SIZE_TO_PAGES (MemorySize),\r
&MemoryAddressUnder1MB\r
//\r
Status = AllocateLegacyMemory (\r
AllocateMaxAddress,\r
+ EfiReservedMemoryType,\r
CONVENTIONAL_MEMORY_TOP,\r
(sizeof (LOW_MEMORY_THUNK) / EFI_PAGE_SIZE) + 2,\r
&MemoryAddress\r
ASSERT ((MemorySize & 0xFFF) == 0);\r
//\r
// Allocate high PMM Memory under 16 MB\r
- // \r
+ //\r
Status = AllocateLegacyMemory (\r
AllocateMaxAddress,\r
+ EfiBootServicesCode,\r
0x1000000,\r
EFI_SIZE_TO_PAGES (MemorySize),\r
&MemoryAddress\r
if (EFI_ERROR (Status)) {\r
//\r
// If it fails, allocate high PMM Memory under 4GB\r
- // \r
+ //\r
Status = AllocateLegacyMemory (\r
AllocateMaxAddress,\r
+ EfiBootServicesCode,\r
0xFFFFFFFF,\r
EFI_SIZE_TO_PAGES (MemorySize),\r
&MemoryAddress\r
- ); \r
+ );\r
}\r
if (!EFI_ERROR (Status)) {\r
EfiToLegacy16InitTable->HiPmmMemory = (UINT32) (EFI_PHYSICAL_ADDRESS) (UINTN) MemoryAddress;\r
EfiToLegacy16InitTable->HiPmmMemorySizeInBytes = MemorySize;\r
- } \r
+ }\r
\r
//\r
// ShutdownAPs();\r
//\r
// Save Unexpected interrupt vector so can restore it just prior to boot\r
//\r
- BaseVectorMaster = (UINT32 *) (sizeof (UINT32) * PROTECTED_MODE_BASE_VECTOR_MASTER);\r
- Private->BiosUnexpectedInt = BaseVectorMaster[0];\r
- IntRedirCode = (UINT32) (UINTN) Private->IntThunk->InterruptRedirectionCode;\r
- for (Index = 0; Index < 8; Index++) {\r
- BaseVectorMaster[Index] = (EFI_SEGMENT (IntRedirCode + Index * 4) << 16) | EFI_OFFSET (IntRedirCode + Index * 4);\r
- }\r
+ ACCESS_PAGE0_CODE (\r
+ BaseVectorMaster = (UINT32 *) (sizeof (UINT32) * PROTECTED_MODE_BASE_VECTOR_MASTER);\r
+ Private->BiosUnexpectedInt = BaseVectorMaster[0];\r
+ IntRedirCode = (UINT32) (UINTN) Private->IntThunk->InterruptRedirectionCode;\r
+ for (Index = 0; Index < 8; Index++) {\r
+ BaseVectorMaster[Index] = (EFI_SEGMENT (IntRedirCode + Index * 4) << 16) | EFI_OFFSET (IntRedirCode + Index * 4);\r
+ }\r
+ );\r
+\r
//\r
// Save EFI value\r
//\r
Private->ThunkSeg = (UINT16) (EFI_SEGMENT (IntRedirCode));\r
- \r
+\r
//\r
// Allocate reserved memory for SMBIOS table used in legacy boot if SMBIOS table exists\r
//\r
&gEfiSmbiosTableGuid,\r
&InstallSmbiosEvent\r
);\r
- ASSERT_EFI_ERROR (Status); \r
+ ASSERT_EFI_ERROR (Status);\r
+\r
+ //\r
+ // Create callback to update status of EndOfDxe, which is needed by NULL\r
+ // pointer detection\r
+ //\r
+ Status = gBS->CreateEventEx (\r
+ EVT_NOTIFY_SIGNAL,\r
+ TPL_NOTIFY,\r
+ ToggleEndOfDxeStatus,\r
+ NULL,\r
+ &gEfiEndOfDxeEventGroupGuid,\r
+ &EndOfDxeEvent\r
+ );\r
+ ASSERT_EFI_ERROR (Status);\r
\r
//\r
// Make a new handle and install the protocol\r
&Private->LegacyBios\r
);\r
Private->Csm16PciInterfaceVersion = GetPciInterfaceVersion (Private);\r
- \r
- DEBUG ((EFI_D_INFO, "CSM16 PCI BIOS Interface Version: %02x.%02x\n", \r
- (UINT8) (Private->Csm16PciInterfaceVersion >> 8), \r
+\r
+ DEBUG ((EFI_D_INFO, "CSM16 PCI BIOS Interface Version: %02x.%02x\n",\r
+ (UINT8) (Private->Csm16PciInterfaceVersion >> 8),\r
(UINT8) Private->Csm16PciInterfaceVersion\r
));\r
ASSERT (Private->Csm16PciInterfaceVersion != 0);\r
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