Adds ARM implementation of EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI.
Cc: Andrew Fish <[email protected]>
Cc: Ray Ni <[email protected]>
Cc: Michael D Kinney <[email protected]>
Cc: Chasel Chiu <[email protected]>
Signed-off-by: Nate DeSimone <[email protected]>
---
EmulatorPkg/Sec/Arm/SwitchRam.S | 32 ++++++++++++++++++
EmulatorPkg/Sec/Arm/TempRam.c | 58 +++++++++++++++++++++++++++++++++
EmulatorPkg/Sec/Sec.inf | 9 ++++-
3 files changed, 98 insertions(+), 1 deletion(-)
create mode 100644 EmulatorPkg/Sec/Arm/SwitchRam.S
create mode 100644 EmulatorPkg/Sec/Arm/TempRam.c
diff --git a/EmulatorPkg/Sec/Arm/SwitchRam.S b/EmulatorPkg/Sec/Arm/SwitchRam.S
new file mode 100644
index 0000000000..d64772b8ed
--- /dev/null
+++ b/EmulatorPkg/Sec/Arm/SwitchRam.S
@@ -0,0 +1,32 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#------------------------------------------------------------------------------
+
+#include <AsmMacroIoLib.h>
+
+#/**
+# This allows the caller to switch the stack and return
+#
+# @param StackDelta Signed amount by which to modify the stack pointer
+#
+# @return Nothing. Goes to the Entry Point passing in the new parameters
+#
+#**/
+#VOID
+#EFIAPI
+#SecSwitchStack (
+# VOID *StackDelta
+# )#
+#
+ASM_FUNC(SecSwitchStack)
+ mov R1, R13
+ add R1, R0, R1
+ mov R13, R1
+ bx LR
+
+
+
diff --git a/EmulatorPkg/Sec/Arm/TempRam.c b/EmulatorPkg/Sec/Arm/TempRam.c
new file mode 100644
index 0000000000..0a6b215591
--- /dev/null
+++ b/EmulatorPkg/Sec/Arm/TempRam.c
@@ -0,0 +1,58 @@
+/*++ @file
+ Temp RAM PPI
+
+ Copyright (c) 2011, Apple Inc. All rights reserved.<BR>
+ Copyright (c) 2023, Intel Corporation. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiPei.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+
+#include <Ppi/TemporaryRamSupport.h>
+
+VOID
+SecSwitchStack (
+ INTN StackDelta
+ );
+
+EFI_STATUS
+EFIAPI
+SecTemporaryRamSupport (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,
+ IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,
+ IN UINTN CopySize
+ )
+{
+ //
+ // Migrate the whole temporary memory to permanent memory.
+ //
+ CopyMem (
+ (VOID *)(UINTN)PermanentMemoryBase,
+ (VOID *)(UINTN)TemporaryMemoryBase,
+ CopySize
+ );
+
+ //
+ // SecSwitchStack function must be invoked after the memory migration
+ // immediately, also we need fixup the stack change caused by new call into
+ // permanent memory.
+ //
+ SecSwitchStack ((UINTN)(PermanentMemoryBase - TemporaryMemoryBase));
+
+ //
+ // We need *not* fix the return address because currently,
+ // The PeiCore is executed in flash.
+ //
+
+ //
+ // Simulate to invalid temporary memory, terminate temporary memory
+ //
+ // ZeroMem ((VOID*)(UINTN)TemporaryMemoryBase, CopySize);
+
+ return EFI_SUCCESS;
+}
diff --git a/EmulatorPkg/Sec/Sec.inf b/EmulatorPkg/Sec/Sec.inf
index 2f9e3d4780..264666f544 100644
--- a/EmulatorPkg/Sec/Sec.inf
+++ b/EmulatorPkg/Sec/Sec.inf
@@ -3,7 +3,7 @@
#
# Main executable file of Unix Emulator that loads PEI core after
initialization finished.
# Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>
-# Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2012 - 2023, Intel Corporation. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -30,10 +30,17 @@
Ia32/SwitchRam.asm
Ia32/SwitchRam.S
+[Sources.ARM]
+ Arm/TempRam.c
+ Arm/SwitchRam.S
+
[Packages]
MdePkg/MdePkg.dec
EmulatorPkg/EmulatorPkg.dec
+[Packages.ARM]
+ ArmPkg/ArmPkg.dec
+
[LibraryClasses]
DebugLib
PeCoffGetEntryPointLib
--
2.30.2
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