diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/ArmPkg/Library/StandaloneMmMmuLib | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/ArmPkg/Library/StandaloneMmMmuLib')
| -rw-r--r-- | roms/edk2/ArmPkg/Library/StandaloneMmMmuLib/AArch64/ArmMmuStandaloneMmLib.c | 179 | ||||
| -rw-r--r-- | roms/edk2/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf | 31 |
2 files changed, 210 insertions, 0 deletions
diff --git a/roms/edk2/ArmPkg/Library/StandaloneMmMmuLib/AArch64/ArmMmuStandaloneMmLib.c b/roms/edk2/ArmPkg/Library/StandaloneMmMmuLib/AArch64/ArmMmuStandaloneMmLib.c new file mode 100644 index 000000000..3806490f7 --- /dev/null +++ b/roms/edk2/ArmPkg/Library/StandaloneMmMmuLib/AArch64/ArmMmuStandaloneMmLib.c @@ -0,0 +1,179 @@ +/** @file
+* File managing the MMU for ARMv8 architecture in S-EL0
+*
+* Copyright (c) 2017 - 2018, ARM Limited. All rights reserved.
+*
+* SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+
+#include <Uefi.h>
+#include <IndustryStandard/ArmMmSvc.h>
+
+#include <Library/ArmLib.h>
+#include <Library/ArmMmuLib.h>
+#include <Library/ArmSvcLib.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+
+STATIC
+EFI_STATUS
+GetMemoryPermissions (
+ IN EFI_PHYSICAL_ADDRESS BaseAddress,
+ OUT UINT32 *MemoryAttributes
+ )
+{
+ ARM_SVC_ARGS GetMemoryPermissionsSvcArgs = {0};
+
+ GetMemoryPermissionsSvcArgs.Arg0 = ARM_SVC_ID_SP_GET_MEM_ATTRIBUTES_AARCH64;
+ GetMemoryPermissionsSvcArgs.Arg1 = BaseAddress;
+ GetMemoryPermissionsSvcArgs.Arg2 = 0;
+ GetMemoryPermissionsSvcArgs.Arg3 = 0;
+
+ ArmCallSvc (&GetMemoryPermissionsSvcArgs);
+ if (GetMemoryPermissionsSvcArgs.Arg0 == ARM_SVC_SPM_RET_INVALID_PARAMS) {
+ *MemoryAttributes = 0;
+ return EFI_INVALID_PARAMETER;
+ }
+
+ *MemoryAttributes = GetMemoryPermissionsSvcArgs.Arg0;
+ return EFI_SUCCESS;
+}
+
+STATIC
+EFI_STATUS
+RequestMemoryPermissionChange (
+ IN EFI_PHYSICAL_ADDRESS BaseAddress,
+ IN UINT64 Length,
+ IN UINTN Permissions
+ )
+{
+ EFI_STATUS Status;
+ ARM_SVC_ARGS ChangeMemoryPermissionsSvcArgs = {0};
+
+ ChangeMemoryPermissionsSvcArgs.Arg0 = ARM_SVC_ID_SP_SET_MEM_ATTRIBUTES_AARCH64;
+ ChangeMemoryPermissionsSvcArgs.Arg1 = BaseAddress;
+ ChangeMemoryPermissionsSvcArgs.Arg2 = EFI_SIZE_TO_PAGES(Length);
+ ChangeMemoryPermissionsSvcArgs.Arg3 = Permissions;
+
+ ArmCallSvc (&ChangeMemoryPermissionsSvcArgs);
+
+ Status = ChangeMemoryPermissionsSvcArgs.Arg0;
+
+ switch (Status) {
+ case ARM_SVC_SPM_RET_SUCCESS:
+ Status = EFI_SUCCESS;
+ break;
+
+ case ARM_SVC_SPM_RET_NOT_SUPPORTED:
+ Status = EFI_UNSUPPORTED;
+ break;
+
+ case ARM_SVC_SPM_RET_INVALID_PARAMS:
+ Status = EFI_INVALID_PARAMETER;
+ break;
+
+ case ARM_SVC_SPM_RET_DENIED:
+ Status = EFI_ACCESS_DENIED;
+ break;
+
+ case ARM_SVC_SPM_RET_NO_MEMORY:
+ Status = EFI_BAD_BUFFER_SIZE;
+ break;
+
+ default:
+ Status = EFI_ACCESS_DENIED;
+ ASSERT (0);
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+ArmSetMemoryRegionNoExec (
+ IN EFI_PHYSICAL_ADDRESS BaseAddress,
+ IN UINT64 Length
+ )
+{
+ EFI_STATUS Status;
+ UINT32 MemoryAttributes;
+ UINT32 CodePermission;
+
+ Status = GetMemoryPermissions (BaseAddress, &MemoryAttributes);
+ if (Status != EFI_INVALID_PARAMETER) {
+ CodePermission = SET_MEM_ATTR_CODE_PERM_XN << SET_MEM_ATTR_CODE_PERM_SHIFT;
+ return RequestMemoryPermissionChange (
+ BaseAddress,
+ Length,
+ MemoryAttributes | CodePermission
+ );
+ }
+ return EFI_INVALID_PARAMETER;
+}
+
+EFI_STATUS
+ArmClearMemoryRegionNoExec (
+ IN EFI_PHYSICAL_ADDRESS BaseAddress,
+ IN UINT64 Length
+ )
+{
+ EFI_STATUS Status;
+ UINT32 MemoryAttributes;
+ UINT32 CodePermission;
+
+ Status = GetMemoryPermissions (BaseAddress, &MemoryAttributes);
+ if (Status != EFI_INVALID_PARAMETER) {
+ CodePermission = SET_MEM_ATTR_CODE_PERM_XN << SET_MEM_ATTR_CODE_PERM_SHIFT;
+ return RequestMemoryPermissionChange (
+ BaseAddress,
+ Length,
+ MemoryAttributes & ~CodePermission
+ );
+ }
+ return EFI_INVALID_PARAMETER;
+}
+
+EFI_STATUS
+ArmSetMemoryRegionReadOnly (
+ IN EFI_PHYSICAL_ADDRESS BaseAddress,
+ IN UINT64 Length
+ )
+{
+ EFI_STATUS Status;
+ UINT32 MemoryAttributes;
+ UINT32 DataPermission;
+
+ Status = GetMemoryPermissions (BaseAddress, &MemoryAttributes);
+ if (Status != EFI_INVALID_PARAMETER) {
+ DataPermission = SET_MEM_ATTR_DATA_PERM_RO << SET_MEM_ATTR_DATA_PERM_SHIFT;
+ return RequestMemoryPermissionChange (
+ BaseAddress,
+ Length,
+ MemoryAttributes | DataPermission
+ );
+ }
+ return EFI_INVALID_PARAMETER;
+}
+
+EFI_STATUS
+ArmClearMemoryRegionReadOnly (
+ IN EFI_PHYSICAL_ADDRESS BaseAddress,
+ IN UINT64 Length
+ )
+{
+ EFI_STATUS Status;
+ UINT32 MemoryAttributes;
+ UINT32 PermissionRequest;
+
+ Status = GetMemoryPermissions (BaseAddress, &MemoryAttributes);
+ if (Status != EFI_INVALID_PARAMETER) {
+ PermissionRequest = SET_MEM_ATTR_MAKE_PERM_REQUEST (SET_MEM_ATTR_DATA_PERM_RW,
+ MemoryAttributes);
+ return RequestMemoryPermissionChange (
+ BaseAddress,
+ Length,
+ PermissionRequest
+ );
+ }
+ return EFI_INVALID_PARAMETER;
+}
diff --git a/roms/edk2/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf b/roms/edk2/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf new file mode 100644 index 000000000..85973687f --- /dev/null +++ b/roms/edk2/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf @@ -0,0 +1,31 @@ +#/** @file
+#
+# Copyright (c) 2017 - 2018, ARM Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x0001001A
+ BASE_NAME = ArmMmuStandaloneMmCoreLib
+ FILE_GUID = da8f0232-fb14-42f0-922c-63104d2c70bd
+ MODULE_TYPE = MM_CORE_STANDALONE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = StandaloneMmMmuLib
+ PI_SPECIFICATION_VERSION = 0x00010032
+
+[Sources.AARCH64]
+ AArch64/ArmMmuStandaloneMmLib.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ ArmLib
+ CacheMaintenanceLib
+ MemoryAllocationLib
+
+
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