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Clean up SEC implementation for Ovmf.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10770 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
mdkinney
2010-08-03 07:41:54 +00:00
parent b43619d0cd
commit 42a83e80f3
14 changed files with 702 additions and 939 deletions
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4
OvmfPkg/Sec/X64/SecEntry.S
View File

@@ -17,7 +17,7 @@
#------------------------------------------------------------------------------
#include "SecMain.h"
#include <Base.h>
#EXTERN ASM_PFX(SecCoreStartupWithStack)
@@ -39,7 +39,7 @@ ASM_PFX(_ModuleEntryPoint):
# Load temporary stack top at very low memory. The C code
# can reload to a better address.
#
movq $INITIAL_TOP_OF_STACK, %rsp
movq $BASE_512KB, %rsp
nop
#

4
OvmfPkg/Sec/X64/SecEntry.asm
View File

@@ -16,7 +16,7 @@
;*
;------------------------------------------------------------------------------
#include "SecMain.h"
#include <Base.h>
.code
@@ -39,7 +39,7 @@ _ModuleEntryPoint PROC PUBLIC
; Load temporary stack top at very low memory. The C code
; can reload to a better address.
;
mov rsp, INITIAL_TOP_OF_STACK
mov rsp, BASE_512KB
nop
;

165
OvmfPkg/Sec/X64/SwitchStack.c
View File

@@ -1,165 +0,0 @@
/** @file
Switch Stack functions.
Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
//
// Include common header file for this module.
//
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/PeiServicesLib.h>
//
// Type define for PEI Core Entry Point function
//
typedef
VOID
(EFIAPI *PEI_CORE_ENTRY_POINT)(
IN CONST EFI_SEC_PEI_HAND_OFF *SecCoreData,
IN CONST EFI_PEI_PPI_DESCRIPTOR *PpiList,
IN VOID *Data
)
;
/**
Transfers control to a function starting with a new stack.
Transfers control to the function specified by EntryPoint using the new stack
specified by NewStack and passing in the parameters specified by Context1 and
Context2. Context1 and Context2 are optional and may be NULL. The function
EntryPoint must never return.
If EntryPoint is NULL, then ASSERT().
If NewStack is NULL, then ASSERT().
@param EntryPoint A pointer to function to call with the new stack.
@param Context1 A pointer to the context to pass into the EntryPoint
function.
@param Context2 A pointer to the context to pass into the EntryPoint
function.
@param NewStack A pointer to the new stack to use for the EntryPoint
function.
@param NewBsp A pointer to the new BSP for the EntryPoint on IPF. It's
Reserved on other architectures.
**/
VOID
EFIAPI
PeiSwitchStacks (
IN SWITCH_STACK_ENTRY_POINT EntryPoint,
IN VOID *Context1, OPTIONAL
IN VOID *Context2, OPTIONAL
IN VOID *Context3, OPTIONAL
IN VOID *OldTopOfStack,
IN VOID *NewStack
)
{
BASE_LIBRARY_JUMP_BUFFER JumpBuffer;
UINTN SizeOfStackUsed;
UINTN SetJumpFlag;
ASSERT (EntryPoint != NULL);
ASSERT (NewStack != NULL);
SetJumpFlag = SetJump (&JumpBuffer);
//
// The initial call to SetJump() must always return 0.
// Subsequent calls to LongJump() may cause a non-zero value to be returned by SetJump().
//
if (SetJumpFlag == 0) {
//
// Stack should be aligned with CPU_STACK_ALIGNMENT
//
ASSERT (((UINTN)NewStack & (CPU_STACK_ALIGNMENT - 1)) == 0);
//JumpBuffer.Rip = (UINTN)EntryPoint;
SizeOfStackUsed = (UINTN)OldTopOfStack - JumpBuffer.Rsp;
JumpBuffer.Rsp = (UINTN)NewStack - SizeOfStackUsed;
MemoryFence ();
CopyMem (
(VOID*) ((UINTN)NewStack - SizeOfStackUsed),
(VOID*) ((UINTN)OldTopOfStack - SizeOfStackUsed),
SizeOfStackUsed
);
LongJump (&JumpBuffer, (UINTN)-1);
} else {
(*(PEI_CORE_ENTRY_POINT)(EntryPoint)) (
(EFI_SEC_PEI_HAND_OFF *) Context1,
(EFI_PEI_PPI_DESCRIPTOR *) Context2,
Context3
);
}
//
// InternalSwitchStack () will never return
//
ASSERT (FALSE);
}
/**
Transfers control to a function starting with a new stack.
Transfers control to the function specified by EntryPoint using the new stack
specified by NewStack and passing in the parameters specified by Context1 and
Context2. Context1 and Context2 are optional and may be NULL. The function
EntryPoint must never return.
If EntryPoint is NULL, then ASSERT().
If NewStack is NULL, then ASSERT().
@param EntryPoint A pointer to function to call with the new stack.
@param Context1 A pointer to the context to pass into the EntryPoint
function.
@param Context2 A pointer to the context to pass into the EntryPoint
function.
@param NewStack A pointer to the new stack to use for the EntryPoint
function.
@param NewBsp A pointer to the new BSP for the EntryPoint on IPF. It's
Reserved on other architectures.
**/
VOID
EFIAPI
SecSwitchStack (
IN UINTN TemporaryMemoryBase,
IN UINTN PermanentMemoryBase,
IN UINTN CopySize
)
{
BASE_LIBRARY_JUMP_BUFFER JumpBuffer;
UINTN SetJumpFlag;
ASSERT ((VOID*)TemporaryMemoryBase != NULL);
ASSERT ((VOID*)PermanentMemoryBase != NULL);
SetJumpFlag = SetJump (&JumpBuffer);
//
// The initial call to SetJump() must always return 0.
// Subsequent calls to LongJump() may cause a non-zero value to be returned by SetJump().
//
if (SetJumpFlag == 0) {
DEBUG ((EFI_D_ERROR, "SecSwitchStack+%d: Rsp: 0x%xL\n", __LINE__, JumpBuffer.Rsp));
JumpBuffer.Rsp =
(INTN)JumpBuffer.Rsp -
(INTN)TemporaryMemoryBase +
(INTN)PermanentMemoryBase;
MemoryFence ();
CopyMem((VOID*)PermanentMemoryBase, (VOID*)TemporaryMemoryBase, CopySize);
LongJump (&JumpBuffer, (UINTN)-1);
}
}