ArmPkg: Implement PeiServicesTablePointerLib using TPIDRURW register

This implementation use the Tpidrurw software context register to
store the PEI Services Table Pointer.

The author of this patch is Eugene Cohen (HP).



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11750 6f19259b-4bc3-4df7-8a09-765794883524

4 files changed, 127 insertions, 0 deletions

diff --git a/ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.S b/ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.S
index 62b8682de5..75e1e0b5df 100644
--- a/ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.S
+++ b/ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.S
@@ -52,6 +52,8 @@ GCC_ASM_EXPORT (ArmReadAuxCr)
 GCC_ASM_EXPORT (ArmReadCbar)
 GCC_ASM_EXPORT (ArmInvalidateInstructionAndDataTlb)
 GCC_ASM_EXPORT (ArmReadMpidr)
+GCC_ASM_EXPORT (ArmReadTpidrurw)
+GCC_ASM_EXPORT (ArmWriteTpidrurw)
 
 .set DC_ON, (0x1<<2)
 .set IC_ON, (0x1<<12)
@@ -344,5 +346,13 @@ ASM_PFX(ArmInvalidateInstructionAndDataTlb):
 ASM_PFX(ArmReadMpidr):
   mrc     p15, 0, r0, c0, c0, 5       @ read MPIDR
   bx      lr
+  
+ASM_PFX(ArmReadTpidrurw):
+  mrc     p15, 0, r0, c13, c0, 2    @ read TPIDRURW
+  bx      lr
+
+ASM_PFX(ArmWriteTpidrurw):
+  mcr     p15, 0, r0, c13, c0, 2    @ write TPIDRURW
+  bx      lr
 
 ASM_FUNCTION_REMOVE_IF_UNREFERENCED
diff --git a/ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.asm b/ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.asm
index 269e10bd56..62539efd91 100644
--- a/ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.asm
+++ b/ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.asm
@@ -50,6 +50,8 @@
     EXPORT  ArmReadCbar
     EXPORT  ArmInvalidateInstructionAndDataTlb
     EXPORT  ArmReadMpidr
+    EXPORT  ArmReadTpidrurw
+    EXPORT  ArmWriteTpidrurw
 
     AREA    ArmCacheLib, CODE, READONLY
     PRESERVE8
@@ -343,5 +345,13 @@ ArmReadMpidr
   mrc     p15, 0, r0, c0, c0, 5    ; read MPIDR
   bx      lr
 
+ArmReadTpidrurw
+  mrc     p15, 0, r0, c13, c0, 2    ; read TPIDRURW
+  bx      lr
+
+ArmWriteTpidrurw
+  mcr     p15, 0, r0, c13, c0, 2    ; write TPIDRURW
+  bx      lr
+
   END
 
diff --git a/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c b/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
new file mode 100644
index 0000000000..0b140e4fdc
--- /dev/null
+++ b/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointer.c
@@ -0,0 +1,62 @@
+/** @file

+  PEI Services Table Pointer Library.

+  

+  This library is used for PEIM which does executed from flash device directly but

+  executed in memory.

+

+  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) 2011 Hewlett-Packard 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 <PiPei.h>

+#include <Library/PeiServicesTablePointerLib.h>

+#include <Library/ArmLib.h>

+#include <Library/DebugLib.h>

+

+/**

+  Caches a pointer PEI Services Table. 

+ 

+  Caches the pointer to the PEI Services Table specified by PeiServicesTablePointer 

+  in a platform specific manner.

+  

+  If PeiServicesTablePointer is NULL, then ASSERT().

+  

+  @param    PeiServicesTablePointer   The address of PeiServices pointer.

+**/

+VOID

+EFIAPI

+SetPeiServicesTablePointer (

+  IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer

+  )

+{

+  ArmWriteTpidrurw((UINTN)PeiServicesTablePointer);

+}

+

+/**

+  Retrieves the cached value of the PEI Services Table pointer.

+

+  Returns the cached value of the PEI Services Table pointer in a CPU specific manner 

+  as specified in the CPU binding section of the Platform Initialization Pre-EFI 

+  Initialization Core Interface Specification.

+  

+  If the cached PEI Services Table pointer is NULL, then ASSERT().

+

+  @return  The pointer to PeiServices.

+

+**/

+CONST EFI_PEI_SERVICES **

+EFIAPI

+GetPeiServicesTablePointer (

+  VOID

+  )

+{

+  return (CONST EFI_PEI_SERVICES **)ArmReadTpidrurw();

+}

diff --git a/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf b/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf
new file mode 100644
index 0000000000..297b95d9a5
--- /dev/null
+++ b/ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf
@@ -0,0 +1,45 @@
+## @file

+# Instance of PEI Services Table Pointer Library using global variable for the table pointer.

+#

+# PEI Services Table Pointer Library implementation that retrieves a pointer to the

+#  PEI Services Table from a global variable. Not available to modules that execute from

+#  read-only memory.

+#

+# Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>

+# Copyright (c) 2011 Hewlett-Packard 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                      = PeiServicesTablePointerLib

+  FILE_GUID                      = C3C9C4ED-EB8A-4548-BE1B-ABB0B6F35B1E

+  MODULE_TYPE                    = PEIM

+  VERSION_STRING                 = 1.0

+  LIBRARY_CLASS                  = PeiServicesTablePointerLib|PEIM PEI_CORE SEC

+

+#

+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC (EBC is for build only)

+#

+

+[Sources]

+  PeiServicesTablePointer.c

+

+[Packages]

+  MdePkg/MdePkg.dec

+  ArmPkg/ArmPkg.dec

+

+[LibraryClasses]

+  ArmLib

+  DebugLib

+  

+[Pcd]

+