[edk2-devel] [PATCH v1 04/15] StandaloneMmPkg: StandaloneMmMemLib: Extends support for X64 architecture
Kun Qin
kun.q at outlook.com
Fri Dec 18 18:50:00 UTC 2020
This change extends StandaloneMmMemLib library to support X64
architecture. The implementation is ported from MdePkg/Library/SmmMemLib.
Cc: Ard Biesheuvel <ard.biesheuvel at arm.com>
Cc: Sami Mujawar <sami.mujawar at arm.com>
Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Supreeth Venkatesh <supreeth.venkatesh at arm.com>
Signed-off-by: Kun Qin <kun.q at outlook.com>
---
StandaloneMmPkg/Library/StandaloneMmMemLib/X64/StandaloneMmMemLibInternal.c | 67 ++++++++++++++++++++
StandaloneMmPkg/Library/StandaloneMmMemLib/StandaloneMmMemLib.inf | 6 +-
2 files changed, 72 insertions(+), 1 deletion(-)
diff --git a/StandaloneMmPkg/Library/StandaloneMmMemLib/X64/StandaloneMmMemLibInternal.c b/StandaloneMmPkg/Library/StandaloneMmMemLib/X64/StandaloneMmMemLibInternal.c
new file mode 100644
index 000000000000..c5e21c583f44
--- /dev/null
+++ b/StandaloneMmPkg/Library/StandaloneMmMemLib/X64/StandaloneMmMemLibInternal.c
@@ -0,0 +1,67 @@
+/** @file
+ Internal ARCH Specific file of MM memory check library.
+
+ MM memory check library implementation. This library consumes MM_ACCESS_PROTOCOL
+ to get MMRAM information. In order to use this library instance, the platform should produce
+ all MMRAM range via MM_ACCESS_PROTOCOL, including the range for firmware (like MM Core
+ and MM driver) and/or specific dedicated hardware.
+
+ Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+//
+// Maximum support address used to check input buffer
+//
+extern EFI_PHYSICAL_ADDRESS mMmMemLibInternalMaximumSupportAddress;
+
+/**
+ Calculate and save the maximum support address.
+
+**/
+VOID
+MmMemLibInternalCalculateMaximumSupportAddress (
+ 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
+ //
+ mMmMemLibInternalMaximumSupportAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)(LShiftU64 (1, PhysicalAddressBits) - 1);
+ DEBUG ((DEBUG_INFO, "mMmMemLibInternalMaximumSupportAddress = 0x%lx\n", mMmMemLibInternalMaximumSupportAddress));
+}
+
+
diff --git a/StandaloneMmPkg/Library/StandaloneMmMemLib/StandaloneMmMemLib.inf b/StandaloneMmPkg/Library/StandaloneMmMemLib/StandaloneMmMemLib.inf
index 49da02e54e6d..65ad0a48905c 100644
--- a/StandaloneMmPkg/Library/StandaloneMmMemLib/StandaloneMmMemLib.inf
+++ b/StandaloneMmPkg/Library/StandaloneMmMemLib/StandaloneMmMemLib.inf
@@ -26,12 +26,15 @@ [Defines]
#
# The following information is for reference only and not required by the build tools.
#
-# VALID_ARCHITECTURES = AARCH64
+# VALID_ARCHITECTURES = X64 AARCH64
#
[Sources.Common]
StandaloneMmMemLib.c
+[Sources.X64]
+ X64/StandaloneMmMemLibInternal.c
+
[Sources.AARCH64]
AArch64/StandaloneMmMemLibInternal.c
@@ -42,3 +45,4 @@ [Packages]
[LibraryClasses]
BaseMemoryLib
DebugLib
+ HobLib
--
2.28.0.windows.1
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