From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
 .../BaseFspSwitchStackLib.inf                      | 33 +++++++++++
 .../BaseFspSwitchStackLib/FspSwitchStackLib.c      | 36 ++++++++++++
 .../Library/BaseFspSwitchStackLib/Ia32/Stack.nasm  | 68 ++++++++++++++++++++++
 3 files changed, 137 insertions(+)
 create mode 100644 roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/BaseFspSwitchStackLib.inf
 create mode 100644 roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/FspSwitchStackLib.c
 create mode 100644 roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/Ia32/Stack.nasm

(limited to 'roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib')

diff --git a/roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/BaseFspSwitchStackLib.inf b/roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/BaseFspSwitchStackLib.inf
new file mode 100644
index 000000000..3dcf3b959
--- /dev/null
+++ b/roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/BaseFspSwitchStackLib.inf
@@ -0,0 +1,33 @@
+## @file
+#  Instance of BaseFspSwitchStackLib
+#
+#  Copyright (c) 2014 - 2016, Intel Corporation. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[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.nasm
+
+[Packages]
+  MdePkg/MdePkg.dec
+  IntelFsp2Pkg/IntelFsp2Pkg.dec
+
+[LibraryClasses]
+  BaseLib
+  IoLib
+
+
+
diff --git a/roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/FspSwitchStackLib.c b/roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/FspSwitchStackLib.c
new file mode 100644
index 000000000..fd553db62
--- /dev/null
+++ b/roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/FspSwitchStackLib.c
@@ -0,0 +1,36 @@
+/** @file
+
+  Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#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/roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/Ia32/Stack.nasm b/roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/Ia32/Stack.nasm
new file mode 100644
index 000000000..659990190
--- /dev/null
+++ b/roms/edk2/IntelFsp2Pkg/Library/BaseFspSwitchStackLib/Ia32/Stack.nasm
@@ -0,0 +1,68 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2016 - 2019, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Abstract:
+;
+;   Switch the stack from temporary memory to permanent memory.
+;
+;------------------------------------------------------------------------------
+
+    SECTION .text
+
+extern ASM_PFX(SwapStack)
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; Pei2LoaderSwitchStack (
+;   VOID
+;   )
+;------------------------------------------------------------------------------
+global ASM_PFX(Pei2LoaderSwitchStack)
+ASM_PFX(Pei2LoaderSwitchStack):
+    xor     eax, eax
+    jmp     ASM_PFX(FspSwitchStack)
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; Loader2PeiSwitchStack (
+;   VOID
+;   )
+;------------------------------------------------------------------------------
+global ASM_PFX(Loader2PeiSwitchStack)
+ASM_PFX(Loader2PeiSwitchStack):
+    jmp     ASM_PFX(FspSwitchStack)
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; FspSwitchStack (
+;   VOID
+;   )
+;------------------------------------------------------------------------------
+global ASM_PFX(FspSwitchStack)
+ASM_PFX(FspSwitchStack):
+    ; Save current contexts
+    push    eax
+    pushfd
+    cli
+    pushad
+    sub     esp, 8
+    sidt    [esp]
+
+    ; Load new stack
+    push    esp
+    call    ASM_PFX(SwapStack)
+    mov     esp, eax
+
+    ; Restore previous contexts
+    lidt    [esp]
+    add     esp, 8
+    popad
+    popfd
+    add     esp, 4
+    ret
+
-- 
cgit 1.2.3-korg