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/** @file
UEFI MemoryAttributesTable support
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <PiDxe.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Guid/EventGroup.h>
#include <Guid/MemoryAttributesTable.h>
#include <Guid/PropertiesTable.h>
#include "DxeMain.h"
/**
This function for GetMemoryMap() with properties table capability.
It calls original GetMemoryMap() to get the original memory map information. Then
plus the additional memory map entries for PE Code/Data seperation.
@param MemoryMapSize A pointer to the size, in bytes, of the
MemoryMap buffer. On input, this is the size of
the buffer allocated by the caller. On output,
it is the size of the buffer returned by the
firmware if the buffer was large enough, or the
size of the buffer needed to contain the map if
the buffer was too small.
@param MemoryMap A pointer to the buffer in which firmware places
the current memory map.
@param MapKey A pointer to the location in which firmware
returns the key for the current memory map.
@param DescriptorSize A pointer to the location in which firmware
returns the size, in bytes, of an individual
EFI_MEMORY_DESCRIPTOR.
@param DescriptorVersion A pointer to the location in which firmware
returns the version number associated with the
EFI_MEMORY_DESCRIPTOR.
@retval EFI_SUCCESS The memory map was returned in the MemoryMap
buffer.
@retval EFI_BUFFER_TOO_SMALL The MemoryMap buffer was too small. The current
buffer size needed to hold the memory map is
returned in MemoryMapSize.
@retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
**/
EFI_STATUS
EFIAPI
CoreGetMemoryMapWithSeparatedImageSection (
IN OUT UINTN *MemoryMapSize,
IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap,
OUT UINTN *MapKey,
OUT UINTN *DescriptorSize,
OUT UINT32 *DescriptorVersion
);
extern EFI_PROPERTIES_TABLE mPropertiesTable;
EFI_MEMORY_ATTRIBUTES_TABLE *mMemoryAttributesTable = NULL;
BOOLEAN mMemoryAttributesTableReadyToBoot = FALSE;
/**
Install MemoryAttributesTable.
**/
VOID
InstallMemoryAttributesTable (
VOID
)
{
UINTN MemoryMapSize;
EFI_MEMORY_DESCRIPTOR *MemoryMap;
EFI_MEMORY_DESCRIPTOR *MemoryMapStart;
UINTN MapKey;
UINTN DescriptorSize;
UINT32 DescriptorVersion;
UINTN Index;
EFI_STATUS Status;
UINT32 RuntimeEntryCount;
EFI_MEMORY_ATTRIBUTES_TABLE *MemoryAttributesTable;
EFI_MEMORY_DESCRIPTOR *MemoryAttributesEntry;
if (gMemoryMapTerminated) {
//
// Directly return after MemoryMap terminated.
//
return;
}
if ((mPropertiesTable.MemoryProtectionAttribute & EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA) == 0) {
DEBUG ((EFI_D_VERBOSE, "MemoryProtectionAttribute NON_EXECUTABLE_PE_DATA is not set, "));
DEBUG ((EFI_D_VERBOSE, "because Runtime Driver Section Alignment is not %dK.\n", RUNTIME_PAGE_ALLOCATION_GRANULARITY >> 10));
return ;
}
if (mMemoryAttributesTable == NULL) {
//
// InstallConfigurationTable here to occupy one entry for MemoryAttributesTable
// before GetMemoryMap below, as InstallConfigurationTable may allocate runtime
// memory for the new entry.
//
Status = gBS->InstallConfigurationTable (&gEfiMemoryAttributesTableGuid, (VOID *) (UINTN) MAX_ADDRESS);
ASSERT_EFI_ERROR (Status);
}
MemoryMapSize = 0;
MemoryMap = NULL;
Status = CoreGetMemoryMapWithSeparatedImageSection (
&MemoryMapSize,
MemoryMap,
&MapKey,
&DescriptorSize,
&DescriptorVersion
);
ASSERT (Status == EFI_BUFFER_TOO_SMALL);
do {
MemoryMap = AllocatePool (MemoryMapSize);
ASSERT (MemoryMap != NULL);
Status = CoreGetMemoryMapWithSeparatedImageSection (
&MemoryMapSize,
MemoryMap,
&MapKey,
&DescriptorSize,
&DescriptorVersion
);
if (EFI_ERROR (Status)) {
FreePool (MemoryMap);
}
} while (Status == EFI_BUFFER_TOO_SMALL);
MemoryMapStart = MemoryMap;
RuntimeEntryCount = 0;
for (Index = 0; Index < MemoryMapSize/DescriptorSize; Index++) {
switch (MemoryMap->Type) {
case EfiRuntimeServicesCode:
case EfiRuntimeServicesData:
RuntimeEntryCount ++;
break;
}
MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, DescriptorSize);
}
//
// Allocate MemoryAttributesTable
//
MemoryAttributesTable = AllocatePool (sizeof(EFI_MEMORY_ATTRIBUTES_TABLE) + DescriptorSize * RuntimeEntryCount);
ASSERT (MemoryAttributesTable != NULL);
MemoryAttributesTable->Version = EFI_MEMORY_ATTRIBUTES_TABLE_VERSION;
MemoryAttributesTable->NumberOfEntries = RuntimeEntryCount;
MemoryAttributesTable->DescriptorSize = (UINT32)DescriptorSize;
MemoryAttributesTable->Reserved = 0;
DEBUG ((EFI_D_VERBOSE, "MemoryAttributesTable:\n"));
DEBUG ((EFI_D_VERBOSE, " Version - 0x%08x\n", MemoryAttributesTable->Version));
DEBUG ((EFI_D_VERBOSE, " NumberOfEntries - 0x%08x\n", MemoryAttributesTable->NumberOfEntries));
DEBUG ((EFI_D_VERBOSE, " DescriptorSize - 0x%08x\n", MemoryAttributesTable->DescriptorSize));
MemoryAttributesEntry = (EFI_MEMORY_DESCRIPTOR *)(MemoryAttributesTable + 1);
MemoryMap = MemoryMapStart;
for (Index = 0; Index < MemoryMapSize/DescriptorSize; Index++) {
switch (MemoryMap->Type) {
case EfiRuntimeServicesCode:
case EfiRuntimeServicesData:
CopyMem (MemoryAttributesEntry, MemoryMap, DescriptorSize);
MemoryAttributesEntry->Attribute &= (EFI_MEMORY_RO|EFI_MEMORY_XP|EFI_MEMORY_RUNTIME);
DEBUG ((EFI_D_VERBOSE, "Entry (0x%x)\n", MemoryAttributesEntry));
DEBUG ((EFI_D_VERBOSE, " Type - 0x%x\n", MemoryAttributesEntry->Type));
DEBUG ((EFI_D_VERBOSE, " PhysicalStart - 0x%016lx\n", MemoryAttributesEntry->PhysicalStart));
DEBUG ((EFI_D_VERBOSE, " VirtualStart - 0x%016lx\n", MemoryAttributesEntry->VirtualStart));
DEBUG ((EFI_D_VERBOSE, " NumberOfPages - 0x%016lx\n", MemoryAttributesEntry->NumberOfPages));
DEBUG ((EFI_D_VERBOSE, " Attribute - 0x%016lx\n", MemoryAttributesEntry->Attribute));
MemoryAttributesEntry = NEXT_MEMORY_DESCRIPTOR(MemoryAttributesEntry, DescriptorSize);
break;
}
MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, DescriptorSize);
}
MemoryMap = MemoryMapStart;
FreePool (MemoryMap);
//
// Update configuratoin table for MemoryAttributesTable.
//
Status = gBS->InstallConfigurationTable (&gEfiMemoryAttributesTableGuid, MemoryAttributesTable);
ASSERT_EFI_ERROR (Status);
if (mMemoryAttributesTable != NULL) {
FreePool (mMemoryAttributesTable);
}
mMemoryAttributesTable = MemoryAttributesTable;
}
/**
Install MemoryAttributesTable on memory allocation.
@param[in] MemoryType EFI memory type.
**/
VOID
InstallMemoryAttributesTableOnMemoryAllocation (
IN EFI_MEMORY_TYPE MemoryType
)
{
//
// Install MemoryAttributesTable after ReadyToBoot on runtime memory allocation.
//
if (mMemoryAttributesTableReadyToBoot &&
((MemoryType == EfiRuntimeServicesCode) || (MemoryType == EfiRuntimeServicesData))) {
InstallMemoryAttributesTable ();
}
}
/**
Install MemoryAttributesTable on ReadyToBoot.
@param[in] Event The Event this notify function registered to.
@param[in] Context Pointer to the context data registered to the Event.
**/
VOID
EFIAPI
InstallMemoryAttributesTableOnReadyToBoot (
IN EFI_EVENT Event,
IN VOID *Context
)
{
InstallMemoryAttributesTable ();
mMemoryAttributesTableReadyToBoot = TRUE;
}
/**
Initialize MemoryAttrubutesTable support.
**/
VOID
EFIAPI
CoreInitializeMemoryAttributesTable (
VOID
)
{
EFI_STATUS Status;
EFI_EVENT ReadyToBootEvent;
//
// Construct the table at ReadyToBoot.
//
Status = CoreCreateEventInternal (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK - 1,
InstallMemoryAttributesTableOnReadyToBoot,
NULL,
&gEfiEventReadyToBootGuid,
&ReadyToBootEvent
);
ASSERT_EFI_ERROR (Status);
return ;
}
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