/*++ @file
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Temp RAM PPI
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Copyright (c) 2011, Apple Inc. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiPei.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Ppi/TemporaryRamSupport.h>
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VOID
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EFIAPI
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SecSwitchStack (
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UINT32 TemporaryMemoryBase,
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UINT32 PermenentMemoryBase
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);
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EFI_STATUS
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EFIAPI
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SecTemporaryRamSupport (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,
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IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,
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IN UINTN CopySize
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)
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{
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//
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// Migrate the whole temporary memory to permanent memory.
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//
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CopyMem (
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(VOID*)(UINTN)PermanentMemoryBase,
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(VOID*)(UINTN)TemporaryMemoryBase,
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CopySize
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);
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//
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// SecSwitchStack function must be invoked after the memory migration
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// immediately, also we need fixup the stack change caused by new call into
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// permanent memory.
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//
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SecSwitchStack ((UINT32) TemporaryMemoryBase, (UINT32) PermanentMemoryBase);
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//
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// We need *not* fix the return address because currently,
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// The PeiCore is executed in flash.
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//
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//
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// Simulate to invalid temporary memory, terminate temporary memory
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//
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//ZeroMem ((VOID*)(UINTN)TemporaryMemoryBase, CopySize);
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return EFI_SUCCESS;
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}
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