diff options
Diffstat (limited to 'IntelFsp2Pkg/Library/BaseFspSwitchStackLib')
4 files changed, 240 insertions, 0 deletions
diff --git a/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/BaseFspSwitchStackLib.inf b/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/BaseFspSwitchStackLib.inf new file mode 100644 index 0000000000..bbeeb744ff --- /dev/null +++ b/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/BaseFspSwitchStackLib.inf @@ -0,0 +1,43 @@ +## @file
+# Instance of BaseFspSwitchStackLib
+#
+# Copyright (c) 2014 - 2015, 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.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = BaseFspSwitchStackLib
+ FILE_GUID = 68E79161-F7CE-4A61-8C72-F4DF6FF35CAA
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = FspSwitchStackLib
+
+[Sources.IA32]
+ FspSwitchStackLib.c
+
+[Sources.IA32]
+ Ia32/Stack.asm | MSFT
+ Ia32/Stack.s | GCC
+
+[Packages]
+ MdePkg/MdePkg.dec
+ IntelFsp2Pkg/IntelFsp2Pkg.dec
+
+[LibraryClasses]
+ BaseLib
+ IoLib
+
+[FixedPcd]
+ gIntelFsp2PkgTokenSpaceGuid.PcdFspMaxPatchEntry ## CONSUMES
+ gIntelFsp2PkgTokenSpaceGuid.PcdFspMaxPerfEntry ## CONSUMES
+
+
+
diff --git a/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/FspSwitchStackLib.c b/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/FspSwitchStackLib.c new file mode 100644 index 0000000000..42a57a27c0 --- /dev/null +++ b/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/FspSwitchStackLib.c @@ -0,0 +1,42 @@ +/** @file
+
+ Copyright (c) 2014, 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 <Base.h>
+#include <Library/BaseLib.h>
+#include <Library/FspCommonLib.h>
+
+/**
+
+ Switch the current stack to the previous saved stack.
+
+ @param[in] NewStack The new stack to be switched.
+
+ @return OldStack After switching to the saved stack,
+ this value will be saved in eax before returning.
+
+
+**/
+UINT32
+SwapStack (
+ IN UINT32 NewStack
+ )
+{
+ FSP_GLOBAL_DATA *FspData;
+ UINT32 OldStack;
+
+ FspData = GetFspGlobalDataPointer ();
+ OldStack = FspData->CoreStack;
+ FspData->CoreStack = NewStack;
+ return OldStack;
+}
+
diff --git a/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/Ia32/Stack.asm b/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/Ia32/Stack.asm new file mode 100644 index 0000000000..1efab52059 --- /dev/null +++ b/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/Ia32/Stack.asm @@ -0,0 +1,77 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2014 - 2015, 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.
+;
+; Abstract:
+;
+; Switch the stack from temporary memory to permenent memory.
+;
+;------------------------------------------------------------------------------
+
+ .586p
+ .model flat,C
+ .code
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; Pei2LoaderSwitchStack (
+; VOID
+; )
+;------------------------------------------------------------------------------
+EXTERNDEF C MeasurePoint:PROC
+Pei2LoaderSwitchStack PROC C PUBLIC
+ xor eax, eax
+ jmp FspSwitchStack
+Pei2LoaderSwitchStack ENDP
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; Loader2PeiSwitchStack (
+; VOID
+; )
+;------------------------------------------------------------------------------
+Loader2PeiSwitchStack PROC C PUBLIC
+ jmp FspSwitchStack
+Loader2PeiSwitchStack ENDP
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; FspSwitchStack (
+; VOID
+; )
+;------------------------------------------------------------------------------
+EXTERNDEF C SwapStack:PROC
+FspSwitchStack PROC C PUBLIC
+ ; Save current contexts
+ push eax
+ pushfd
+ cli
+ pushad
+ sub esp, 8
+ sidt fword ptr [esp]
+
+ ; Load new stack
+ push esp
+ call SwapStack
+ mov esp, eax
+
+ ; Restore previous contexts
+ lidt fword ptr [esp]
+ add esp, 8
+ popad
+ popfd
+ add esp, 4
+ ret
+FspSwitchStack ENDP
+
+ END
diff --git a/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/Ia32/Stack.s b/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/Ia32/Stack.s new file mode 100644 index 0000000000..a21a5b6c61 --- /dev/null +++ b/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/Ia32/Stack.s @@ -0,0 +1,78 @@ +#------------------------------------------------------------------------------
+#
+# Copyright (c) 2014 - 2015, 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.
+#
+# Abstract:
+#
+# Switch the stack from temporary memory to permenent memory.
+#
+#------------------------------------------------------------------------------
+
+
+#------------------------------------------------------------------------------
+# UINT32
+# EFIAPI
+# Pei2LoaderSwitchStack (
+# VOID
+# )
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(Pei2LoaderSwitchStack)
+ASM_PFX(Pei2LoaderSwitchStack):
+ xorl %eax, %eax
+ jmp ASM_PFX(FspSwitchStack)
+
+#------------------------------------------------------------------------------
+# UINT32
+# EFIAPI
+# Loader2PeiSwitchStack (
+# VOID
+# )
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(Loader2PeiSwitchStack)
+ASM_PFX(Loader2PeiSwitchStack):
+ jmp ASM_PFX(FspSwitchStack)
+
+#------------------------------------------------------------------------------
+# UINT32
+# EFIAPI
+# FspSwitchStack (
+# VOID
+# )
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(FspSwitchStack)
+ASM_PFX(FspSwitchStack):
+ #
+ #Save current contexts
+ #
+ push %eax
+ pushf
+ cli
+ pusha
+ sub $0x08, %esp
+ sidt (%esp)
+
+ #
+ # Load new stack
+ #
+ push %esp
+ call ASM_PFX(SwapStack)
+ movl %eax, %esp
+
+ #
+ # Restore previous contexts
+ #
+ lidt (%esp)
+ add $0x08,%esp
+ popa
+ popf
+ add $0x04,%esp
+ ret
+
+
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