OvmfPkg: Move SEC/PEI Temporary RAM from 0x70000 to 0x810000

Note: The Temporary RAM memory size is being reduced from
      64KB to 32KB. This still appears to be more than
      adequate for OVMF's early PEI phase. We will be adding
      another 32KB range of RAM just above this range for
      use on S3 resume.

The range is declared as part of MEMFD, so it is easier
to identify the memory range.

We also now assign PCDs to the memory range.

The PCDs are used to set the initial SEC/PEI stack in
SEC's assembly code.

The PCDs are also used in the SEC C code to setup
the Temporary RAM PPI.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15147 6f19259b-4bc3-4df7-8a09-765794883524

2 files changed, 68 insertions, 60 deletions

diff --git a/OvmfPkg/Sec/Ia32/SecEntry.S b/OvmfPkg/Sec/Ia32/SecEntry.S
index a1b0c0d0f0..0771a87449 100644
--- a/OvmfPkg/Sec/Ia32/SecEntry.S
+++ b/OvmfPkg/Sec/Ia32/SecEntry.S
@@ -1,55 +1,59 @@
-#      TITLE   SecEntry.asm
-#------------------------------------------------------------------------------
-#*
-#*   Copyright (c) 2006 - 2009, 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.
-#*
-#*    CpuAsm.asm
-#*
-#*   Abstract:
-#*
-#------------------------------------------------------------------------------
-
-
-#include <Base.h>
-
-#EXTERN ASM_PFX(SecCoreStartupWithStack)
-
-#
-# SecCore Entry Point
-#
-# Processor is in flat protected mode
-#
-# @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)
-# @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
-# @param[in]  EBP   Pointer to the start of the Boot Firmware Volume
-#
-# @return     None  This routine does not return
-#
-ASM_GLOBAL ASM_PFX(_ModuleEntryPoint)
-ASM_PFX(_ModuleEntryPoint):
-
-    #
-    # Load temporary stack top at very low memory.  The C code
-    # can reload to a better address.
-    #
-    movl    $BASE_512KB, %eax 
-    movl    %eax, %esp
-    nop
-
-    #
-    # Call into C code
-    #
-    pushl   %eax
-    pushl   %ebp
-    call    ASM_PFX(SecCoreStartupWithStack)
-
-
-#END
-
+#      TITLE   SecEntry.asm

+#------------------------------------------------------------------------------

+#*

+#*   Copyright (c) 2006 - 2013, 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.

+#*

+#*    CpuAsm.asm

+#*

+#*   Abstract:

+#*

+#------------------------------------------------------------------------------

+

+

+#include <Base.h>

+

+#EXTERN ASM_PFX(SecCoreStartupWithStack)

+

+#

+# SecCore Entry Point

+#

+# Processor is in flat protected mode

+#

+# @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)

+# @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor

+# @param[in]  EBP   Pointer to the start of the Boot Firmware Volume

+#

+# @return     None  This routine does not return

+#

+ASM_GLOBAL ASM_PFX(_ModuleEntryPoint)

+ASM_PFX(_ModuleEntryPoint):

+

+    #

+    # Load temporary RAM stack based on PCDs

+    #

+    .set    SEC_TOP_OF_STACK, FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \

+                              FixedPcdGet32 (PcdOvmfSecPeiTempRamSize)

+    movl    $SEC_TOP_OF_STACK, %eax

+    movl    %eax, %esp

+    nop

+

+    #

+    # Setup parameters and call SecCoreStartupWithStack

+    #   [esp]   return address for call

+    #   [esp+4] BootFirmwareVolumePtr

+    #   [esp+8] TopOfCurrentStack

+    #

+    pushl   %eax

+    pushl   %ebp

+    call    ASM_PFX(SecCoreStartupWithStack)

+

+

+#END

+

diff --git a/OvmfPkg/Sec/Ia32/SecEntry.asm b/OvmfPkg/Sec/Ia32/SecEntry.asm
index 4b0e95af48..e9458adc49 100644
--- a/OvmfPkg/Sec/Ia32/SecEntry.asm
+++ b/OvmfPkg/Sec/Ia32/SecEntry.asm
@@ -1,7 +1,7 @@
       TITLE   SecEntry.asm

 ;------------------------------------------------------------------------------

 ;*

-;*   Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>

+;*   Copyright (c) 2006 - 2013, 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

@@ -38,15 +38,19 @@ EXTERN SecCoreStartupWithStack:PROC
 _ModuleEntryPoint PROC PUBLIC

 

     ;

-    ; Load temporary stack top at very low memory.  The C code

-    ; can reload to a better address.

+    ; Load temporary RAM stack based on PCDs

     ;

-    mov     eax, BASE_512KB

+    SEC_TOP_OF_STACK EQU (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \

+                          FixedPcdGet32 (PcdOvmfSecPeiTempRamSize))

+    mov     eax, SEC_TOP_OF_STACK

     mov     esp, eax

     nop

 

     ;

-    ; Call into C code

+    ; Setup parameters and call SecCoreStartupWithStack

+    ;   [esp]   return address for call

+    ;   [esp+4] BootFirmwareVolumePtr

+    ;   [esp+8] TopOfCurrentStack

     ;

     push    eax

     push    ebp