Support functions for managing debug image info table when loading and unloading\r
images.\r
\r
-Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r
-All rights reserved. This program and the accompanying materials\r
-are licensed and made available under the terms and conditions of the BSD License\r
-which accompanies this distribution. The 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
+Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
+SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
NULL // EFI_DEBUG_IMAGE_INFO *EfiDebugImageInfoTable;\r
};\r
\r
-EFI_SYSTEM_TABLE_POINTER *mDebugTable = NULL;\r
+UINTN mMaxTableEntries = 0;\r
\r
+EFI_SYSTEM_TABLE_POINTER *mDebugTable = NULL;\r
\r
+#define EFI_DEBUG_TABLE_ENTRY_SIZE (sizeof (VOID *))\r
\r
/**\r
Creates and initializes the DebugImageInfo Table. Also creates the configuration\r
table and registers it into the system table.\r
\r
- Note:\r
- This function allocates memory, frees it, and then allocates memory at an\r
- address within the initial allocation. Since this function is called early\r
- in DXE core initialization (before drivers are dispatched), this should not\r
- be a problem.\r
-\r
**/\r
VOID\r
CoreInitializeDebugImageInfoTable (\r
VOID\r
)\r
{\r
- EFI_STATUS Status;\r
- EFI_PHYSICAL_ADDRESS Mem;\r
- UINTN NumberOfPages;\r
+ EFI_STATUS Status;\r
+ UINTN Pages;\r
+ EFI_PHYSICAL_ADDRESS Memory;\r
+ UINTN AlignedMemory;\r
+ UINTN AlignmentMask;\r
+ UINTN UnalignedPages;\r
+ UINTN RealPages;\r
\r
//\r
- // Allocate boot services memory for the structure. It's required to be aligned on\r
- // a 4M boundary, so allocate a 4M block (plus what we require), free it up, calculate\r
- // a 4M aligned address within the memory we just freed, and then allocate memory at that\r
- // address for our initial structure.\r
+ // Allocate 4M aligned page for the structure and fill in the data.\r
+ // Ideally we would update the CRC now as well, but the service may not yet be available.\r
+ // See comments in the CoreUpdateDebugTableCrc32() function below for details.\r
//\r
- NumberOfPages = FOUR_MEG_PAGES + EFI_SIZE_TO_PAGES(sizeof (EFI_SYSTEM_TABLE_POINTER));\r
+ Pages = EFI_SIZE_TO_PAGES (sizeof (EFI_SYSTEM_TABLE_POINTER));\r
+ AlignmentMask = SIZE_4MB - 1;\r
+ RealPages = Pages + EFI_SIZE_TO_PAGES (SIZE_4MB);\r
\r
- Status = CoreAllocatePages (AllocateAnyPages, EfiBootServicesData, NumberOfPages , &Mem);\r
- ASSERT_EFI_ERROR (Status);\r
- if (EFI_ERROR(Status)) {\r
- return;\r
+ //\r
+ // Attempt to allocate memory below PcdMaxEfiSystemTablePointerAddress\r
+ // If PcdMaxEfiSystemTablePointerAddress is 0, then allocate memory below\r
+ // MAX_ADDRESS\r
+ //\r
+ Memory = PcdGet64 (PcdMaxEfiSystemTablePointerAddress);\r
+ if (Memory == 0) {\r
+ Memory = MAX_ADDRESS;\r
}\r
- Status = CoreFreePages (Mem, NumberOfPages);\r
- ASSERT_EFI_ERROR (Status);\r
- if (EFI_ERROR(Status)) {\r
- return;\r
+ Status = CoreAllocatePages (\r
+ AllocateMaxAddress,\r
+ EfiBootServicesData,\r
+ RealPages,\r
+ &Memory\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ if (PcdGet64 (PcdMaxEfiSystemTablePointerAddress) != 0) {\r
+ DEBUG ((EFI_D_INFO, "Allocate memory for EFI_SYSTEM_TABLE_POINTER below PcdMaxEfiSystemTablePointerAddress failed. \\r
+ Retry to allocate memroy as close to the top of memory as feasible.\n"));\r
+ }\r
+ //\r
+ // If the initial memory allocation fails, then reattempt allocation\r
+ // as close to the top of memory as feasible.\r
+ //\r
+ Status = CoreAllocatePages (\r
+ AllocateAnyPages,\r
+ EfiBootServicesData,\r
+ RealPages,\r
+ &Memory\r
+ );\r
+ ASSERT_EFI_ERROR (Status);\r
+ if (EFI_ERROR (Status)) {\r
+ return;\r
+ }\r
}\r
+\r
//\r
- // Now get a 4M aligned address within the memory range we were given.\r
- // Then allocate memory at that address\r
+ // Free overallocated pages\r
//\r
- Mem = (Mem + FOUR_MEG_MASK) & (~FOUR_MEG_MASK);\r
-\r
- Status = CoreAllocatePages (AllocateAddress, EfiBootServicesData, NumberOfPages - FOUR_MEG_PAGES, &Mem);\r
- ASSERT_EFI_ERROR (Status);\r
- if (EFI_ERROR(Status)) {\r
- return;\r
+ AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;\r
+ UnalignedPages = EFI_SIZE_TO_PAGES (AlignedMemory - (UINTN)Memory);\r
+ if (UnalignedPages > 0) {\r
+ //\r
+ // Free first unaligned page(s).\r
+ //\r
+ Status = CoreFreePages (Memory, UnalignedPages);\r
+ ASSERT_EFI_ERROR (Status);\r
}\r
+ Memory = AlignedMemory + EFI_PAGES_TO_SIZE (Pages);\r
+ UnalignedPages = RealPages - Pages - UnalignedPages;\r
+ if (UnalignedPages > 0) {\r
+ //\r
+ // Free last unaligned page(s).\r
+ //\r
+ Status = CoreFreePages (Memory, UnalignedPages);\r
+ ASSERT_EFI_ERROR (Status);\r
+ }\r
+\r
//\r
- // We now have a 4M aligned page allocated, so fill in the data structure.\r
- // Ideally we would update the CRC now as well, but the service may not yet be available.\r
- // See comments in the CoreUpdateDebugTableCrc32() function below for details.\r
+ // Set mDebugTable to the 4MB aligned allocated pages\r
+ //\r
+ mDebugTable = (EFI_SYSTEM_TABLE_POINTER *)(AlignedMemory);\r
+ ASSERT (mDebugTable != NULL);\r
+\r
//\r
- mDebugTable = (EFI_SYSTEM_TABLE_POINTER *)(UINTN)Mem;\r
- mDebugTable->Signature = EFI_SYSTEM_TABLE_SIGNATURE;\r
+ // Initialize EFI_SYSTEM_TABLE_POINTER structure\r
+ //\r
+ mDebugTable->Signature = EFI_SYSTEM_TABLE_SIGNATURE;\r
mDebugTable->EfiSystemTableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) gDxeCoreST;\r
- mDebugTable->Crc32 = 0;\r
+ mDebugTable->Crc32 = 0;\r
+\r
+ //\r
+ // Install the EFI_SYSTEM_TABLE_POINTER structure in the EFI System\r
+ // Configuration Table\r
+ //\r
Status = CoreInstallConfigurationTable (&gEfiDebugImageInfoTableGuid, &mDebugInfoTableHeader);\r
ASSERT_EFI_ERROR (Status);\r
}\r
EFI_DEBUG_IMAGE_INFO *Table;\r
EFI_DEBUG_IMAGE_INFO *NewTable;\r
UINTN Index;\r
- UINTN MaxTableIndex;\r
UINTN TableSize;\r
\r
//\r
mDebugInfoTableHeader.UpdateStatus |= EFI_DEBUG_IMAGE_INFO_UPDATE_IN_PROGRESS;\r
\r
Table = mDebugInfoTableHeader.EfiDebugImageInfoTable;\r
- MaxTableIndex = mDebugInfoTableHeader.TableSize;\r
\r
- for (Index = 0; Index < MaxTableIndex; Index++) {\r
- if (Table[Index].NormalImage == NULL) {\r
- //\r
- // We have found a free entry so exit the loop\r
- //\r
- break;\r
+ if (mDebugInfoTableHeader.TableSize < mMaxTableEntries) {\r
+ //\r
+ // We still have empty entires in the Table, find the first empty entry.\r
+ //\r
+ Index = 0;\r
+ while (Table[Index].NormalImage != NULL) {\r
+ Index++;\r
}\r
- }\r
- if (Index == MaxTableIndex) {\r
+ //\r
+ // There must be an empty entry in the in the table.\r
+ //\r
+ ASSERT (Index < mMaxTableEntries);\r
+ } else {\r
//\r
// Table is full, so re-allocate another page for a larger table...\r
//\r
- TableSize = MaxTableIndex * EFI_DEBUG_TABLE_ENTRY_SIZE;\r
+ TableSize = mMaxTableEntries * EFI_DEBUG_TABLE_ENTRY_SIZE;\r
NewTable = AllocateZeroPool (TableSize + EFI_PAGE_SIZE);\r
if (NewTable == NULL) {\r
mDebugInfoTableHeader.UpdateStatus &= ~EFI_DEBUG_IMAGE_INFO_UPDATE_IN_PROGRESS;\r
//\r
Table = NewTable;\r
mDebugInfoTableHeader.EfiDebugImageInfoTable = NewTable;\r
- mDebugInfoTableHeader.TableSize += EFI_PAGE_SIZE / EFI_DEBUG_TABLE_ENTRY_SIZE;\r
+ //\r
+ // Enlarge the max table entries and set the first empty entry index to\r
+ // be the original max table entries.\r
+ //\r
+ Index = mMaxTableEntries;\r
+ mMaxTableEntries += EFI_PAGE_SIZE / EFI_DEBUG_TABLE_ENTRY_SIZE;\r
}\r
+\r
//\r
// Allocate data for new entry\r
//\r
Table[Index].NormalImage->ImageInfoType = (UINT32) ImageInfoType;\r
Table[Index].NormalImage->LoadedImageProtocolInstance = LoadedImage;\r
Table[Index].NormalImage->ImageHandle = ImageHandle;\r
+ //\r
+ // Increase the number of EFI_DEBUG_IMAGE_INFO elements and set the mDebugInfoTable in modified status.\r
+ //\r
+ mDebugInfoTableHeader.TableSize++;\r
+ mDebugInfoTableHeader.UpdateStatus |= EFI_DEBUG_IMAGE_INFO_TABLE_MODIFIED;\r
}\r
mDebugInfoTableHeader.UpdateStatus &= ~EFI_DEBUG_IMAGE_INFO_UPDATE_IN_PROGRESS;\r
}\r
\r
Table = mDebugInfoTableHeader.EfiDebugImageInfoTable;\r
\r
- for (Index = 0; Index < mDebugInfoTableHeader.TableSize; Index++) {\r
+ for (Index = 0; Index < mMaxTableEntries; Index++) {\r
if (Table[Index].NormalImage != NULL && Table[Index].NormalImage->ImageHandle == ImageHandle) {\r
//\r
// Found a match. Free up the record, then NULL the pointer to indicate the slot\r
//\r
CoreFreePool (Table[Index].NormalImage);\r
Table[Index].NormalImage = NULL;\r
+ //\r
+ // Decrease the number of EFI_DEBUG_IMAGE_INFO elements and set the mDebugInfoTable in modified status.\r
+ //\r
+ mDebugInfoTableHeader.TableSize--;\r
+ mDebugInfoTableHeader.UpdateStatus |= EFI_DEBUG_IMAGE_INFO_TABLE_MODIFIED;\r
break;\r
}\r
}\r
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