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https://github.com/CloverHackyColor/CloverBootloader.git
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297 lines
10 KiB
C
297 lines
10 KiB
C
/** @file
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UEFI MemoryAttributesTable support
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Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiDxe.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/DxeServicesTableLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiLib.h>
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#include <Guid/EventGroup.h>
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#include <Guid/MemoryAttributesTable.h>
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#include <Guid/PropertiesTable.h>
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#include "DxeMain.h"
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/**
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This function for GetMemoryMap() with properties table capability.
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It calls original GetMemoryMap() to get the original memory map information. Then
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plus the additional memory map entries for PE Code/Data seperation.
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@param MemoryMapSize A pointer to the size, in bytes, of the
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MemoryMap buffer. On input, this is the size of
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the buffer allocated by the caller. On output,
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it is the size of the buffer returned by the
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firmware if the buffer was large enough, or the
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size of the buffer needed to contain the map if
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the buffer was too small.
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@param MemoryMap A pointer to the buffer in which firmware places
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the current memory map.
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@param MapKey A pointer to the location in which firmware
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returns the key for the current memory map.
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@param DescriptorSize A pointer to the location in which firmware
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returns the size, in bytes, of an individual
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EFI_MEMORY_DESCRIPTOR.
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@param DescriptorVersion A pointer to the location in which firmware
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returns the version number associated with the
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EFI_MEMORY_DESCRIPTOR.
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@retval EFI_SUCCESS The memory map was returned in the MemoryMap
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buffer.
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@retval EFI_BUFFER_TOO_SMALL The MemoryMap buffer was too small. The current
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buffer size needed to hold the memory map is
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returned in MemoryMapSize.
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@retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
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**/
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EFI_STATUS
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EFIAPI
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CoreGetMemoryMapWithSeparatedImageSection (
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IN OUT UINTN *MemoryMapSize,
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IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap,
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OUT UINTN *MapKey,
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OUT UINTN *DescriptorSize,
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OUT UINT32 *DescriptorVersion
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);
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extern EFI_PROPERTIES_TABLE mPropertiesTable;
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EFI_MEMORY_ATTRIBUTES_TABLE *mMemoryAttributesTable = NULL;
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BOOLEAN mMemoryAttributesTableReadyToBoot = FALSE;
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/**
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Install MemoryAttributesTable.
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**/
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VOID
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InstallMemoryAttributesTable (
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VOID
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)
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{
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UINTN MemoryMapSize;
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EFI_MEMORY_DESCRIPTOR *MemoryMap;
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EFI_MEMORY_DESCRIPTOR *MemoryMapStart;
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UINTN MapKey;
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UINTN DescriptorSize;
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UINT32 DescriptorVersion;
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UINTN Index;
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EFI_STATUS Status;
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UINT32 RuntimeEntryCount;
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EFI_MEMORY_ATTRIBUTES_TABLE *MemoryAttributesTable;
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EFI_MEMORY_DESCRIPTOR *MemoryAttributesEntry;
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if (gMemoryMapTerminated) {
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//
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// Directly return after MemoryMap terminated.
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//
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return;
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}
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if ((mPropertiesTable.MemoryProtectionAttribute & EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA) == 0) {
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DEBUG ((EFI_D_VERBOSE, "MemoryProtectionAttribute NON_EXECUTABLE_PE_DATA is not set, "));
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DEBUG ((EFI_D_VERBOSE, "because Runtime Driver Section Alignment is not %dK.\n", RUNTIME_PAGE_ALLOCATION_GRANULARITY >> 10));
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return ;
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}
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if (mMemoryAttributesTable == NULL) {
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//
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// InstallConfigurationTable here to occupy one entry for MemoryAttributesTable
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// before GetMemoryMap below, as InstallConfigurationTable may allocate runtime
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// memory for the new entry.
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//
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Status = gBS->InstallConfigurationTable (&gEfiMemoryAttributesTableGuid, (VOID *) (UINTN) MAX_ADDRESS);
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ASSERT_EFI_ERROR (Status);
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}
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MemoryMapSize = 0;
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MemoryMap = NULL;
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Status = CoreGetMemoryMapWithSeparatedImageSection (
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&MemoryMapSize,
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MemoryMap,
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&MapKey,
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&DescriptorSize,
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&DescriptorVersion
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);
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ASSERT (Status == EFI_BUFFER_TOO_SMALL);
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do {
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MemoryMap = AllocatePool (MemoryMapSize);
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ASSERT (MemoryMap != NULL);
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Status = CoreGetMemoryMapWithSeparatedImageSection (
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&MemoryMapSize,
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MemoryMap,
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&MapKey,
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&DescriptorSize,
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&DescriptorVersion
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);
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if (EFI_ERROR (Status)) {
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FreePool (MemoryMap);
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}
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} while (Status == EFI_BUFFER_TOO_SMALL);
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MemoryMapStart = MemoryMap;
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RuntimeEntryCount = 0;
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for (Index = 0; Index < MemoryMapSize/DescriptorSize; Index++) {
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switch (MemoryMap->Type) {
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case EfiRuntimeServicesCode:
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case EfiRuntimeServicesData:
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RuntimeEntryCount ++;
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break;
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}
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MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, DescriptorSize);
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}
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//
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// Allocate MemoryAttributesTable
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//
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MemoryAttributesTable = AllocatePool (sizeof(EFI_MEMORY_ATTRIBUTES_TABLE) + DescriptorSize * RuntimeEntryCount);
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ASSERT (MemoryAttributesTable != NULL);
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MemoryAttributesTable->Version = EFI_MEMORY_ATTRIBUTES_TABLE_VERSION;
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MemoryAttributesTable->NumberOfEntries = RuntimeEntryCount;
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MemoryAttributesTable->DescriptorSize = (UINT32)DescriptorSize;
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MemoryAttributesTable->Reserved = 0;
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DEBUG ((EFI_D_VERBOSE, "MemoryAttributesTable:\n"));
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DEBUG ((EFI_D_VERBOSE, " Version - 0x%08x\n", MemoryAttributesTable->Version));
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DEBUG ((EFI_D_VERBOSE, " NumberOfEntries - 0x%08x\n", MemoryAttributesTable->NumberOfEntries));
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DEBUG ((EFI_D_VERBOSE, " DescriptorSize - 0x%08x\n", MemoryAttributesTable->DescriptorSize));
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MemoryAttributesEntry = (EFI_MEMORY_DESCRIPTOR *)(MemoryAttributesTable + 1);
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MemoryMap = MemoryMapStart;
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for (Index = 0; Index < MemoryMapSize/DescriptorSize; Index++) {
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switch (MemoryMap->Type) {
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case EfiRuntimeServicesCode:
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case EfiRuntimeServicesData:
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CopyMem (MemoryAttributesEntry, MemoryMap, DescriptorSize);
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MemoryAttributesEntry->Attribute &= (EFI_MEMORY_RO|EFI_MEMORY_XP|EFI_MEMORY_RUNTIME);
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DEBUG ((EFI_D_VERBOSE, "Entry (0x%x)\n", MemoryAttributesEntry));
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DEBUG ((EFI_D_VERBOSE, " Type - 0x%x\n", MemoryAttributesEntry->Type));
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DEBUG ((EFI_D_VERBOSE, " PhysicalStart - 0x%016lx\n", MemoryAttributesEntry->PhysicalStart));
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DEBUG ((EFI_D_VERBOSE, " VirtualStart - 0x%016lx\n", MemoryAttributesEntry->VirtualStart));
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DEBUG ((EFI_D_VERBOSE, " NumberOfPages - 0x%016lx\n", MemoryAttributesEntry->NumberOfPages));
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DEBUG ((EFI_D_VERBOSE, " Attribute - 0x%016lx\n", MemoryAttributesEntry->Attribute));
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MemoryAttributesEntry = NEXT_MEMORY_DESCRIPTOR(MemoryAttributesEntry, DescriptorSize);
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break;
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}
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MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, DescriptorSize);
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}
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MemoryMap = MemoryMapStart;
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FreePool (MemoryMap);
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//
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// Update configuratoin table for MemoryAttributesTable.
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//
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Status = gBS->InstallConfigurationTable (&gEfiMemoryAttributesTableGuid, MemoryAttributesTable);
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ASSERT_EFI_ERROR (Status);
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if (mMemoryAttributesTable != NULL) {
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FreePool (mMemoryAttributesTable);
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}
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mMemoryAttributesTable = MemoryAttributesTable;
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}
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/**
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Install MemoryAttributesTable on memory allocation.
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@param[in] MemoryType EFI memory type.
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**/
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VOID
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InstallMemoryAttributesTableOnMemoryAllocation (
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IN EFI_MEMORY_TYPE MemoryType
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)
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{
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//
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// Install MemoryAttributesTable after ReadyToBoot on runtime memory allocation.
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//
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if (mMemoryAttributesTableReadyToBoot &&
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((MemoryType == EfiRuntimeServicesCode) || (MemoryType == EfiRuntimeServicesData))) {
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InstallMemoryAttributesTable ();
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}
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}
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/**
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Install MemoryAttributesTable on ReadyToBoot.
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@param[in] Event The Event this notify function registered to.
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@param[in] Context Pointer to the context data registered to the Event.
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**/
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VOID
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EFIAPI
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InstallMemoryAttributesTableOnReadyToBoot (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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InstallMemoryAttributesTable ();
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mMemoryAttributesTableReadyToBoot = TRUE;
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}
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/**
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Install initial MemoryAttributesTable on EndOfDxe.
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Then SMM can consume this information.
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@param[in] Event The Event this notify function registered to.
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@param[in] Context Pointer to the context data registered to the Event.
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**/
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VOID
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EFIAPI
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InstallMemoryAttributesTableOnEndOfDxe (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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InstallMemoryAttributesTable ();
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}
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/**
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Initialize MemoryAttrubutesTable support.
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**/
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VOID
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EFIAPI
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CoreInitializeMemoryAttributesTable (
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VOID
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)
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{
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EFI_STATUS Status;
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EFI_EVENT ReadyToBootEvent;
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EFI_EVENT EndOfDxeEvent;
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//
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// Construct the table at ReadyToBoot.
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//
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Status = CoreCreateEventInternal (
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EVT_NOTIFY_SIGNAL,
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TPL_CALLBACK,
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InstallMemoryAttributesTableOnReadyToBoot,
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NULL,
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&gEfiEventReadyToBootGuid,
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&ReadyToBootEvent
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);
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ASSERT_EFI_ERROR (Status);
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//
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// Construct the initial table at EndOfDxe,
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// then SMM can consume this information.
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// Use TPL_NOTIFY here, as such SMM code (TPL_CALLBACK)
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// can run after it.
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//
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Status = CoreCreateEventInternal (
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EVT_NOTIFY_SIGNAL,
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TPL_NOTIFY,
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InstallMemoryAttributesTableOnEndOfDxe,
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NULL,
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&gEfiEndOfDxeEventGroupGuid,
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&EndOfDxeEvent
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);
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ASSERT_EFI_ERROR (Status);
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return ;
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}
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