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, 61 insertions, 58 deletions

diff --git a/OvmfPkg/Sec/X64/SecEntry.S b/OvmfPkg/Sec/X64/SecEntry.S
index de0859bcfb..37354d9f3c 100644
--- a/OvmfPkg/Sec/X64/SecEntry.S
+++ b/OvmfPkg/Sec/X64/SecEntry.S
@@ -1,54 +1,56 @@
-#      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]  RAX   Initial value of the EAX register (BIST: Built-in Self Test)
-# @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
-# @param[in]  RBP   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.
-    #
-    movq    $BASE_512KB, %rsp 
-    nop
-
-    #
-    # Setup parameters and call SecCoreStartupWithStack
-    #   rcx: BootFirmwareVolumePtr
-    #   rdx: TopOfCurrentStack
-    #
-    movq    %rbp, %rcx
-    movq    %rsp, %rdx
-    subq    $0x20, %rsp
-    call    ASM_PFX(SecCoreStartupWithStack)
-
+#      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]  RAX   Initial value of the EAX register (BIST: Built-in Self Test)

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

+# @param[in]  RBP   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.

+    #

+    .set    SEC_TOP_OF_STACK, FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \

+                              FixedPcdGet32 (PcdOvmfSecPeiTempRamSize)

+    movq    $SEC_TOP_OF_STACK, %rsp 

+    nop

+

+    #

+    # Setup parameters and call SecCoreStartupWithStack

+    #   rcx: BootFirmwareVolumePtr

+    #   rdx: TopOfCurrentStack

+    #

+    movq    %rbp, %rcx

+    movq    %rsp, %rdx

+    subq    $0x20, %rsp

+    call    ASM_PFX(SecCoreStartupWithStack)

+

diff --git a/OvmfPkg/Sec/X64/SecEntry.asm b/OvmfPkg/Sec/X64/SecEntry.asm
index 55f5eabbfd..4135208a3a 100644
--- a/OvmfPkg/Sec/X64/SecEntry.asm
+++ b/OvmfPkg/Sec/X64/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

@@ -36,10 +36,11 @@ 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     rsp, BASE_512KB

+    SEC_TOP_OF_STACK EQU (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \

+                          FixedPcdGet32 (PcdOvmfSecPeiTempRamSize))

+    mov     rsp, SEC_TOP_OF_STACK

     nop

 

     ;