1 files changed, 104 insertions, 0 deletions
diff --git a/roms/edk2/OvmfPkg/SmmAccess/SmramInternal.h b/roms/edk2/OvmfPkg/SmmAccess/SmramInternal.h
new file mode 100644
index 000000000..a4d8827ad
--- /dev/null
+++ b/roms/edk2/OvmfPkg/SmmAccess/SmramInternal.h
@@ -0,0 +1,104 @@
+/** @file
+
+  Functions and types shared by the SMM accessor PEI and DXE modules.
+
+  Copyright (C) 2015, Red Hat, Inc.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Pi/PiMultiPhase.h>
+
+//
+// We'll have two SMRAM ranges.
+//
+// The first is a tiny one that hosts an SMM_S3_RESUME_STATE object, to be
+// filled in by the CPU SMM driver during normal boot, for the PEI instance of
+// the LockBox library (which will rely on the object during S3 resume).
+//
+// The other SMRAM range is the main one, for the SMM core and the SMM drivers.
+//
+typedef enum {
+  DescIdxSmmS3ResumeState = 0,
+  DescIdxMain             = 1,
+  DescIdxCount            = 2
+} DESCRIPTOR_INDEX;
+
+//
+// The value of PcdQ35TsegMbytes is saved into this variable at module startup.
+//
+extern UINT16 mQ35TsegMbytes;
+
+/**
+  Save PcdQ35TsegMbytes into mQ35TsegMbytes.
+**/
+VOID
+InitQ35TsegMbytes (
+  VOID
+  );
+
+/**
+  Save PcdQ35SmramAtDefaultSmbase into mQ35SmramAtDefaultSmbase.
+**/
+VOID
+InitQ35SmramAtDefaultSmbase (
+  VOID
+  );
+
+/**
+  Read the MCH_SMRAM and ESMRAMC registers, and update the LockState and
+  OpenState fields in the PEI_SMM_ACCESS_PPI / EFI_SMM_ACCESS2_PROTOCOL object,
+  from the D_LCK and T_EN bits.
+
+  PEI_SMM_ACCESS_PPI and EFI_SMM_ACCESS2_PROTOCOL member functions can rely on
+  the LockState and OpenState fields being up-to-date on entry, and they need
+  to restore the same invariant on exit, if they touch the bits in question.
+
+  @param[out] LockState  Reflects the D_LCK bit on output; TRUE iff SMRAM is
+                         locked.
+  @param[out] OpenState  Reflects the inverse of the T_EN bit on output; TRUE
+                         iff SMRAM is open.
+**/
+VOID
+GetStates (
+  OUT BOOLEAN *LockState,
+  OUT BOOLEAN *OpenState
+  );
+
+//
+// The functions below follow the PEI_SMM_ACCESS_PPI and
+// EFI_SMM_ACCESS2_PROTOCOL member declarations. The PeiServices and This
+// pointers are removed (TSEG doesn't depend on them), and so is the
+// DescriptorIndex parameter (TSEG doesn't support range-wise locking).
+//
+// The LockState and OpenState members that are common to both
+// PEI_SMM_ACCESS_PPI and EFI_SMM_ACCESS2_PROTOCOL are taken and updated in
+// isolation from the rest of the (non-shared) members.
+//
+
+EFI_STATUS
+SmramAccessOpen (
+  OUT BOOLEAN *LockState,
+  OUT BOOLEAN *OpenState
+  );
+
+EFI_STATUS
+SmramAccessClose (
+  OUT BOOLEAN *LockState,
+  OUT BOOLEAN *OpenState
+  );
+
+EFI_STATUS
+SmramAccessLock (
+  OUT    BOOLEAN *LockState,
+  IN OUT BOOLEAN *OpenState
+  );
+
+EFI_STATUS
+SmramAccessGetCapabilities (
+  IN BOOLEAN                  LockState,
+  IN BOOLEAN                  OpenState,
+  IN OUT UINTN                *SmramMapSize,
+  IN OUT EFI_SMRAM_DESCRIPTOR *SmramMap
+  );