diff options
Diffstat (limited to 'MdePkg/Library/SmmMemLib/SmmMemLib.c')
| -rw-r--r-- | MdePkg/Library/SmmMemLib/SmmMemLib.c | 343 |
1 files changed, 0 insertions, 343 deletions
diff --git a/MdePkg/Library/SmmMemLib/SmmMemLib.c b/MdePkg/Library/SmmMemLib/SmmMemLib.c deleted file mode 100644 index 420c5a755f..0000000000 --- a/MdePkg/Library/SmmMemLib/SmmMemLib.c +++ /dev/null @@ -1,343 +0,0 @@ -/** @file
- Instance of SMM memory check library.
-
- SMM memory check library library implementation. This library consumes SMM_ACCESS2_PROTOCOL
- to get SMRAM information. In order to use this library instance, the platform should produce
- all SMRAM range via SMM_ACCESS2_PROTOCOL, including the range for firmware (like SMM Core
- and SMM driver) and/or specific dedicated hardware.
-
- Copyright (c) 2015, 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 <PiSmm.h>
-
-#include <Library/BaseLib.h>
-#include <Library/BaseMemoryLib.h>
-#include <Library/DebugLib.h>
-#include <Library/MemoryAllocationLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/SmmServicesTableLib.h>
-#include <Library/HobLib.h>
-#include <Protocol/SmmAccess2.h>
-
-EFI_SMRAM_DESCRIPTOR *mSmmMemLibInternalSmramRanges;
-UINTN mSmmMemLibInternalSmramCount;
-
-//
-// Maximum support address used to check input buffer
-//
-EFI_PHYSICAL_ADDRESS mSmmMemLibInternalMaximumSupportAddress = 0;
-
-/**
- Calculate and save the maximum support address.
-
-**/
-VOID
-SmmMemLibInternalCalculateMaximumSupportAddress (
- VOID
- )
-{
- VOID *Hob;
- UINT32 RegEax;
- UINT8 PhysicalAddressBits;
-
- //
- // Get physical address bits supported.
- //
- Hob = GetFirstHob (EFI_HOB_TYPE_CPU);
- if (Hob != NULL) {
- PhysicalAddressBits = ((EFI_HOB_CPU *) Hob)->SizeOfMemorySpace;
- } else {
- AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);
- if (RegEax >= 0x80000008) {
- AsmCpuid (0x80000008, &RegEax, NULL, NULL, NULL);
- PhysicalAddressBits = (UINT8) RegEax;
- } else {
- PhysicalAddressBits = 36;
- }
- }
- //
- // IA-32e paging translates 48-bit linear addresses to 52-bit physical addresses.
- //
- ASSERT (PhysicalAddressBits <= 52);
- if (PhysicalAddressBits > 48) {
- PhysicalAddressBits = 48;
- }
-
- //
- // Save the maximum support address in one global variable
- //
- mSmmMemLibInternalMaximumSupportAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)(LShiftU64 (1, PhysicalAddressBits) - 1);
- DEBUG ((EFI_D_INFO, "mSmmMemLibInternalMaximumSupportAddress = 0x%lx\n", mSmmMemLibInternalMaximumSupportAddress));
-}
-
-/**
- This function check if the buffer is valid per processor architecture and not overlap with SMRAM.
-
- @param Buffer The buffer start address to be checked.
- @param Length The buffer length to be checked.
-
- @retval TRUE This buffer is valid per processor architecture and not overlap with SMRAM.
- @retval FALSE This buffer is not valid per processor architecture or overlap with SMRAM.
-**/
-BOOLEAN
-EFIAPI
-SmmIsBufferOutsideSmmValid (
- IN EFI_PHYSICAL_ADDRESS Buffer,
- IN UINT64 Length
- )
-{
- UINTN Index;
-
- //
- // Check override.
- // NOTE: (B:0->L:4G) is invalid for IA32, but (B:1->L:4G-1)/(B:4G-1->L:1) is valid.
- //
- if ((Length > mSmmMemLibInternalMaximumSupportAddress) ||
- (Buffer > mSmmMemLibInternalMaximumSupportAddress) ||
- ((Length != 0) && (Buffer > (mSmmMemLibInternalMaximumSupportAddress - (Length - 1)))) ) {
- //
- // Overflow happen
- //
- DEBUG ((
- EFI_D_ERROR,
- "SmmIsBufferOutsideSmmValid: Overflow: Buffer (0x%lx) - Length (0x%lx), MaximumSupportAddress (0x%lx)\n",
- Buffer,
- Length,
- mSmmMemLibInternalMaximumSupportAddress
- ));
- return FALSE;
- }
-
- for (Index = 0; Index < mSmmMemLibInternalSmramCount; Index ++) {
- if (((Buffer >= mSmmMemLibInternalSmramRanges[Index].CpuStart) && (Buffer < mSmmMemLibInternalSmramRanges[Index].CpuStart + mSmmMemLibInternalSmramRanges[Index].PhysicalSize)) ||
- ((mSmmMemLibInternalSmramRanges[Index].CpuStart >= Buffer) && (mSmmMemLibInternalSmramRanges[Index].CpuStart < Buffer + Length))) {
- DEBUG ((
- EFI_D_ERROR,
- "SmmIsBufferOutsideSmmValid: Overlap: Buffer (0x%lx) - Length (0x%lx), ",
- Buffer,
- Length
- ));
- DEBUG ((
- EFI_D_ERROR,
- "CpuStart (0x%lx) - PhysicalSize (0x%lx)\n",
- mSmmMemLibInternalSmramRanges[Index].CpuStart,
- mSmmMemLibInternalSmramRanges[Index].PhysicalSize
- ));
- return FALSE;
- }
- }
-
- return TRUE;
-}
-
-/**
- Copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
-
- This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
- It checks if source buffer is valid per processor architecture and not overlap with SMRAM.
- If the check passes, it copies memory and returns EFI_SUCCESS.
- If the check fails, it return EFI_SECURITY_VIOLATION.
- The implementation must be reentrant.
-
- @param DestinationBuffer The pointer to the destination buffer of the memory copy.
- @param SourceBuffer The pointer to the source buffer of the memory copy.
- @param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
-
- @retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per processor architecture or overlap with SMRAM.
- @retval EFI_SUCCESS Memory is copied.
-
-**/
-EFI_STATUS
-EFIAPI
-SmmCopyMemToSmram (
- OUT VOID *DestinationBuffer,
- IN CONST VOID *SourceBuffer,
- IN UINTN Length
- )
-{
- if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)SourceBuffer, Length)) {
- DEBUG ((EFI_D_ERROR, "SmmCopyMemToSmram: Security Violation: Source (0x%x), Length (0x%x)\n", SourceBuffer, Length));
- return EFI_SECURITY_VIOLATION;
- }
- CopyMem (DestinationBuffer, SourceBuffer, Length);
- return EFI_SUCCESS;
-}
-
-/**
- Copies a source buffer (SMRAM) to a destination buffer (NON-SMRAM).
-
- This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
- It checks if destination buffer is valid per processor architecture and not overlap with SMRAM.
- If the check passes, it copies memory and returns EFI_SUCCESS.
- If the check fails, it returns EFI_SECURITY_VIOLATION.
- The implementation must be reentrant.
-
- @param DestinationBuffer The pointer to the destination buffer of the memory copy.
- @param SourceBuffer The pointer to the source buffer of the memory copy.
- @param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
-
- @retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per processor architecture or overlap with SMRAM.
- @retval EFI_SUCCESS Memory is copied.
-
-**/
-EFI_STATUS
-EFIAPI
-SmmCopyMemFromSmram (
- OUT VOID *DestinationBuffer,
- IN CONST VOID *SourceBuffer,
- IN UINTN Length
- )
-{
- if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)DestinationBuffer, Length)) {
- DEBUG ((EFI_D_ERROR, "SmmCopyMemFromSmram: Security Violation: Destination (0x%x), Length (0x%x)\n", DestinationBuffer, Length));
- return EFI_SECURITY_VIOLATION;
- }
- CopyMem (DestinationBuffer, SourceBuffer, Length);
- return EFI_SUCCESS;
-}
-
-/**
- Copies a source buffer (NON-SMRAM) to a destination buffer (NON-SMRAM).
-
- This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
- It checks if source buffer and destination buffer are valid per processor architecture and not overlap with SMRAM.
- If the check passes, it copies memory and returns EFI_SUCCESS.
- If the check fails, it returns EFI_SECURITY_VIOLATION.
- The implementation must be reentrant, and it must handle the case where source buffer overlaps destination buffer.
-
- @param DestinationBuffer The pointer to the destination buffer of the memory copy.
- @param SourceBuffer The pointer to the source buffer of the memory copy.
- @param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
-
- @retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per processor architecture or overlap with SMRAM.
- @retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per processor architecture or overlap with SMRAM.
- @retval EFI_SUCCESS Memory is copied.
-
-**/
-EFI_STATUS
-EFIAPI
-SmmCopyMem (
- OUT VOID *DestinationBuffer,
- IN CONST VOID *SourceBuffer,
- IN UINTN Length
- )
-{
- if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)DestinationBuffer, Length)) {
- DEBUG ((EFI_D_ERROR, "SmmCopyMem: Security Violation: Destination (0x%x), Length (0x%x)\n", DestinationBuffer, Length));
- return EFI_SECURITY_VIOLATION;
- }
- if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)SourceBuffer, Length)) {
- DEBUG ((EFI_D_ERROR, "SmmCopyMem: Security Violation: Source (0x%x), Length (0x%x)\n", SourceBuffer, Length));
- return EFI_SECURITY_VIOLATION;
- }
- CopyMem (DestinationBuffer, SourceBuffer, Length);
- return EFI_SUCCESS;
-}
-
-/**
- Fills a target buffer (NON-SMRAM) with a byte value.
-
- This function fills a target buffer (non-SMRAM) with a byte value.
- It checks if target buffer is valid per processor architecture and not overlap with SMRAM.
- If the check passes, it fills memory and returns EFI_SUCCESS.
- If the check fails, it returns EFI_SECURITY_VIOLATION.
-
- @param Buffer The memory to set.
- @param Length The number of bytes to set.
- @param Value The value with which to fill Length bytes of Buffer.
-
- @retval EFI_SECURITY_VIOLATION The Buffer is invalid per processor architecture or overlap with SMRAM.
- @retval EFI_SUCCESS Memory is set.
-
-**/
-EFI_STATUS
-EFIAPI
-SmmSetMem (
- OUT VOID *Buffer,
- IN UINTN Length,
- IN UINT8 Value
- )
-{
- if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)Buffer, Length)) {
- DEBUG ((EFI_D_ERROR, "SmmSetMem: Security Violation: Source (0x%x), Length (0x%x)\n", Buffer, Length));
- return EFI_SECURITY_VIOLATION;
- }
- SetMem (Buffer, Length, Value);
- return EFI_SUCCESS;
-}
-
-/**
- The constructor function initializes the Smm Mem library
-
- @param ImageHandle The firmware allocated handle for the EFI image.
- @param SystemTable A pointer to the EFI System Table.
-
- @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
-
-**/
-EFI_STATUS
-EFIAPI
-SmmMemLibConstructor (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-{
- EFI_STATUS Status;
- EFI_SMM_ACCESS2_PROTOCOL *SmmAccess;
- UINTN Size;
-
- //
- // Get SMRAM information
- //
- Status = gBS->LocateProtocol (&gEfiSmmAccess2ProtocolGuid, NULL, (VOID **)&SmmAccess);
- ASSERT_EFI_ERROR (Status);
-
- Size = 0;
- Status = SmmAccess->GetCapabilities (SmmAccess, &Size, NULL);
- ASSERT (Status == EFI_BUFFER_TOO_SMALL);
-
- mSmmMemLibInternalSmramRanges = AllocatePool (Size);
- ASSERT (mSmmMemLibInternalSmramRanges != NULL);
-
- Status = SmmAccess->GetCapabilities (SmmAccess, &Size, mSmmMemLibInternalSmramRanges);
- ASSERT_EFI_ERROR (Status);
-
- mSmmMemLibInternalSmramCount = Size / sizeof (EFI_SMRAM_DESCRIPTOR);
-
- //
- // Calculate and save maximum support address
- //
- SmmMemLibInternalCalculateMaximumSupportAddress ();
-
- return EFI_SUCCESS;
-}
-
-/**
- The destructor function frees resource used in the Smm Mem library
-
- @param[in] ImageHandle The firmware allocated handle for the EFI image.
- @param[in] SystemTable A pointer to the EFI System Table.
-
- @retval EFI_SUCCESS The deconstructor always returns EFI_SUCCESS.
-**/
-EFI_STATUS
-EFIAPI
-SmmMemLibDestructor (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-{
- FreePool (mSmmMemLibInternalSmramRanges);
-
- return EFI_SUCCESS;
-}
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