ArmPlatformPkg: Replaced 'ArmPlatformTrustzoneSupported' by the fixed Pcd gArmTokenSpaceGuid.PcdTrustzoneSupport

This change does not make possible to disable Trustzone from the firmware.
The firmware has to be built for Trustzone support enabled or disabled.

The memory page table are now defined as 'Normal Memory' in any case.
Except for RTSM Device Memory which as to be Secure Device Memory due
to a RTSM bug.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12452 6f19259b-4bc3-4df7-8a09-765794883524

ArmPkg/ArmPkg.dec

@@ -68,6 +68,8 @@
   gArmTokenSpaceGuid.PcdEfiUncachedMemoryToStronglyOrdered|FALSE|BOOLEAN|0x00000025
 
 [PcdsFixedAtBuild.common]
+  gArmTokenSpaceGuid.PcdTrustzoneSupport|FALSE|BOOLEAN|0x00000006
+
   # This PCD should be a FeaturePcd. But we used this PCD as an '#if' in an ASM file.
   # Using a FeaturePcd make a '(BOOLEAN) casting for its value which is not understood by the preprocessor.
   gArmTokenSpaceGuid.PcdVFPEnabled|0|UINT32|0x00000024

ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEb.c

@@ -47,26 +47,6 @@ ARM_CORE_INFO mRealViewEbMpCoreInfoTable[] = {
   }
 };
 
-/**
-  Return if Trustzone is supported by your platform
-
-  A non-zero value must be returned if you want to support a Secure World on your platform.
-  ArmPlatformTrustzoneInit() will later set up the secure regions.
-  This function can return 0 even if Trustzone is supported by your processor. In this case,
-  the platform will continue to run in Secure World.
-
-  @return   A non-zero value if Trustzone supported.
-
-**/
-UINTN
-ArmPlatformTrustzoneSupported (
-  VOID
-  )
-{
-  // There is no Trustzone controllers (TZPC & TZASC) and no Secure Memory on RTSM
-  return FALSE;
-}
-
 /**
   Remap the memory at 0x0
 

ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbMem.c

@@ -25,8 +25,6 @@
 // DDR attributes
 #define DDR_ATTRIBUTES_CACHED           ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
 #define DDR_ATTRIBUTES_UNCACHED         ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
-#define DDR_ATTRIBUTES_SECURE_CACHED    ARM_MEMORY_REGION_ATTRIBUTE_SECURE_WRITE_BACK
-#define DDR_ATTRIBUTES_SECURE_UNCACHED  ARM_MEMORY_REGION_ATTRIBUTE_SECURE_UNCACHED_UNBUFFERED
 
 /**
   Return the Virtual Memory Map of your platform
@@ -44,7 +42,6 @@ ArmPlatformGetVirtualMemoryMap (
   )
 {
   UINT32                        CacheAttributes;
-  BOOLEAN                       bTrustzoneSupport = FALSE;
   UINTN                         Index = 0;
   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
 
@@ -56,9 +53,9 @@ ArmPlatformGetVirtualMemoryMap (
   }
 
   if (FeaturePcdGet(PcdCacheEnable) == TRUE) {
-    CacheAttributes = (bTrustzoneSupport ? DDR_ATTRIBUTES_CACHED : DDR_ATTRIBUTES_SECURE_CACHED);
+    CacheAttributes = DDR_ATTRIBUTES_CACHED;
   } else {
-    CacheAttributes = (bTrustzoneSupport ? DDR_ATTRIBUTES_UNCACHED : DDR_ATTRIBUTES_SECURE_UNCACHED);
+    CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
   }
 
   // ReMap (Either NOR Flash or DRAM)
@@ -77,13 +74,13 @@ ArmPlatformGetVirtualMemoryMap (
   VirtualMemoryTable[++Index].PhysicalBase = ARM_EB_SMB_MB_ON_CHIP_PERIPH_BASE;
   VirtualMemoryTable[Index].VirtualBase  = ARM_EB_SMB_MB_ON_CHIP_PERIPH_BASE;
   VirtualMemoryTable[Index].Length       = ARM_EB_SMB_MB_ON_CHIP_PERIPH_SZ;
-  VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+  VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE;
 
   // SMB CS0-CS1 - NOR Flash 1 & 2
   VirtualMemoryTable[++Index].PhysicalBase = ARM_EB_SMB_NOR_BASE;
   VirtualMemoryTable[Index].VirtualBase  = ARM_EB_SMB_NOR_BASE;
   VirtualMemoryTable[Index].Length       = ARM_EB_SMB_NOR_SZ + ARM_EB_SMB_DOC_SZ;
-  VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+  VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE;
 
   // SMB CS2 - SRAM
   VirtualMemoryTable[++Index].PhysicalBase = ARM_EB_SMB_SRAM_BASE;
@@ -95,14 +92,14 @@ ArmPlatformGetVirtualMemoryMap (
   VirtualMemoryTable[++Index].PhysicalBase = ARM_EB_SMB_PERIPH_BASE;
   VirtualMemoryTable[Index].VirtualBase  = ARM_EB_SMB_PERIPH_BASE;
   VirtualMemoryTable[Index].Length       = ARM_EB_SMB_PERIPH_SZ;
-  VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+  VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE;
 
   // If a Logic Tile is connected to The ARM Versatile Express Motherboard
   if (MmioRead32(ARM_EB_SYS_PROCID1_REG) != 0) {
       VirtualMemoryTable[++Index].PhysicalBase = ARM_EB_LOGIC_TILE_BASE;
       VirtualMemoryTable[Index].VirtualBase  = ARM_EB_LOGIC_TILE_BASE;
       VirtualMemoryTable[Index].Length       = ARM_EB_LOGIC_TILE_SZ;
-      VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+      VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE;
 
       ASSERT((Index + 1) == (MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS + 1));
   } else {

ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/ArmVExpressSecLib.inf

@@ -49,4 +49,6 @@
   gArmPlatformTokenSpaceGuid.PcdNorFlashRemapping
 
 [FixedPcd]
+  gArmTokenSpaceGuid.PcdTrustzoneSupport
+
   gArmTokenSpaceGuid.PcdL2x0ControllerBase

ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4.c

@@ -105,25 +105,6 @@ PL341_DMC_CONFIG DDRTimings = {
   .ExtModeReg = DDR_EMR_RTT_50R | (DDR_EMR_ODS_VAL << DDR_EMR_ODS_MASK),
 };
 
-/**
-  Return if Trustzone is supported by your platform
-
-  A non-zero value must be returned if you want to support a Secure World on your platform.
-  ArmVExpressTrustzoneInit() will later set up the secure regions.
-  This function can return 0 even if Trustzone is supported by your processor. In this case,
-  the platform will continue to run in Secure World.
-
-  @return   A non-zero value if Trustzone supported.
-
-**/
-UINTN
-ArmPlatformTrustzoneSupported (
-  VOID
-  )
-{
-  return (MmioRead32(ARM_VE_SYS_CFGRW1_REG) & ARM_VE_CFGRW1_TZASC_EN_BIT_MASK);
-}
-
 /**
   Return the current Boot Mode
 
@@ -137,7 +118,11 @@ ArmPlatformGetBootMode (
   VOID
   )
 {
+  if (MmioRead32(ARM_VE_SYS_FLAGS_NV_REG) == 0) {
     return BOOT_WITH_FULL_CONFIGURATION;
+  } else {
+    return BOOT_ON_S2_RESUME;
+  }
 }
 
 /**

ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Mem.c

@@ -26,8 +26,6 @@
 // DDR attributes
 #define DDR_ATTRIBUTES_CACHED           ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
 #define DDR_ATTRIBUTES_UNCACHED         ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
-#define DDR_ATTRIBUTES_SECURE_CACHED    ARM_MEMORY_REGION_ATTRIBUTE_SECURE_WRITE_BACK
-#define DDR_ATTRIBUTES_SECURE_UNCACHED  ARM_MEMORY_REGION_ATTRIBUTE_SECURE_UNCACHED_UNBUFFERED
 
 /**
   Return the Virtual Memory Map of your platform
@@ -45,7 +43,6 @@ ArmPlatformGetVirtualMemoryMap (
   )
 {
   ARM_MEMORY_REGION_ATTRIBUTES  CacheAttributes;
-  BOOLEAN                       bTrustzoneSupport;
   UINTN                         Index = 0;
   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
 
@@ -56,34 +53,17 @@ ArmPlatformGetVirtualMemoryMap (
       return;
   }
 
-  // Check if SMC TZASC is enabled. If Trustzone not enabled then all the entries remain in Secure World.
-  // As this value can be changed in the Board Configuration file, the UEFI firmware needs to work for both case
-  if (ArmPlatformTrustzoneSupported ()) {
-    bTrustzoneSupport = TRUE;
-  } else {
-      bTrustzoneSupport = FALSE;
-  }
-
   if (FeaturePcdGet(PcdCacheEnable) == TRUE) {
-      CacheAttributes = (bTrustzoneSupport ? DDR_ATTRIBUTES_CACHED : DDR_ATTRIBUTES_SECURE_CACHED);
+      CacheAttributes = DDR_ATTRIBUTES_CACHED;
   } else {
-      CacheAttributes = (bTrustzoneSupport ? DDR_ATTRIBUTES_UNCACHED : DDR_ATTRIBUTES_SECURE_UNCACHED);
+      CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
   }
 
+  if (FeaturePcdGet(PcdNorFlashRemapping) == FALSE) {
     // ReMap (Either NOR Flash or DRAM)
     VirtualMemoryTable[Index].PhysicalBase = ARM_VE_REMAP_BASE;
     VirtualMemoryTable[Index].VirtualBase  = ARM_VE_REMAP_BASE;
     VirtualMemoryTable[Index].Length       = ARM_VE_REMAP_SZ;
-
-  if (FeaturePcdGet(PcdNorFlashRemapping)) {
-    // Map the NOR Flash as Secure Memory
-    if (FeaturePcdGet(PcdCacheEnable) == TRUE) {
-      VirtualMemoryTable[Index].Attributes   = DDR_ATTRIBUTES_SECURE_CACHED;
-    } else {
-      VirtualMemoryTable[Index].Attributes   = DDR_ATTRIBUTES_SECURE_UNCACHED;
-    }
-  } else {
-    // DRAM mapping
     VirtualMemoryTable[Index].Attributes   = CacheAttributes;
   }
 
@@ -97,13 +77,13 @@ ArmPlatformGetVirtualMemoryMap (
   VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_SMB_MB_ON_CHIP_PERIPH_BASE;
   VirtualMemoryTable[Index].VirtualBase  = ARM_VE_SMB_MB_ON_CHIP_PERIPH_BASE;
   VirtualMemoryTable[Index].Length       = ARM_VE_SMB_MB_ON_CHIP_PERIPH_SZ;
-  VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+  VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
 
   // SMB CS0-CS1 - NOR Flash 1 & 2
   VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_SMB_NOR0_BASE;
   VirtualMemoryTable[Index].VirtualBase  = ARM_VE_SMB_NOR0_BASE;
   VirtualMemoryTable[Index].Length       = ARM_VE_SMB_NOR0_SZ + ARM_VE_SMB_NOR1_SZ;
-  VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+  VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
 
   // SMB CS2 - SRAM
   VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_SMB_SRAM_BASE;
@@ -115,14 +95,14 @@ ArmPlatformGetVirtualMemoryMap (
   VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_SMB_PERIPH_BASE;
   VirtualMemoryTable[Index].VirtualBase  = ARM_VE_SMB_PERIPH_BASE;
   VirtualMemoryTable[Index].Length       = ARM_VE_SMB_PERIPH_SZ;
-  VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+  VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
 
   // If a Logic Tile is connected to The ARM Versatile Express Motherboard
   if (MmioRead32(ARM_VE_SYS_PROCID1_REG) != 0) {
       VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_EXT_AXI_BASE;
       VirtualMemoryTable[Index].VirtualBase  = ARM_VE_EXT_AXI_BASE;
       VirtualMemoryTable[Index].Length       = ARM_VE_EXT_AXI_SZ;
-      VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+      VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
 
       ASSERT((Index + 1) == (MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS + 1));
   } else {

ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibCTA9x4/CTA9x4Sec.c

@@ -39,6 +39,12 @@ ArmPlatformTrustzoneInit (
   // Setup TZ Protection Controller
   //
 
+  if (MmioRead32(ARM_VE_SYS_CFGRW1_REG) & ARM_VE_CFGRW1_TZASC_EN_BIT_MASK) {
+    ASSERT (PcdGetBool (PcdTrustzoneSupport) == TRUE);
+  } else {
+    ASSERT (PcdGetBool (PcdTrustzoneSupport) == FALSE);
+  }
+
   // Set Non Secure access for all devices
   TZPCSetDecProtBits(ARM_VE_TZPC_BASE, TZPC_DECPROT_0, 0xFFFFFFFF);
   TZPCSetDecProtBits(ARM_VE_TZPC_BASE, TZPC_DECPROT_1, 0xFFFFFFFF);

ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/RTSM.c

@@ -23,6 +23,11 @@
 
 #include <ArmPlatform.h>
 
+UINTN
+ArmGetCpuCountPerCluster (
+  VOID
+  );
+
 ARM_CORE_INFO mVersatileExpressMpCoreInfoTable[] = {
   {
     // Cluster 0, Core 0
@@ -66,26 +71,6 @@ ARM_CORE_INFO mVersatileExpressMpCoreInfoTable[] = {
   }
 };
 
-/**
-  Return if Trustzone is supported by your platform
-
-  A non-zero value must be returned if you want to support a Secure World on your platform.
-  ArmVExpressTrustzoneInit() will later set up the secure regions.
-  This function can return 0 even if Trustzone is supported by your processor. In this case,
-  the platform will continue to run in Secure World.
-
-  @return   A non-zero value if Trustzone supported.
-
-**/
-UINTN
-ArmPlatformTrustzoneSupported (
-  VOID
-  )
-{
-  // Not supported yet but model does have Secure SRAM (but no TZPC/TZASC) so we could support it
-  return FALSE;
-}
-
 /**
   Return the current Boot Mode
 

ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/RTSMMem.c

@@ -25,8 +25,6 @@
 // DDR attributes
 #define DDR_ATTRIBUTES_CACHED           ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
 #define DDR_ATTRIBUTES_UNCACHED         ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
-#define DDR_ATTRIBUTES_SECURE_CACHED    ARM_MEMORY_REGION_ATTRIBUTE_SECURE_WRITE_BACK
-#define DDR_ATTRIBUTES_SECURE_UNCACHED  ARM_MEMORY_REGION_ATTRIBUTE_SECURE_UNCACHED_UNBUFFERED
 
 /**
   Return the Virtual Memory Map of your platform
@@ -44,7 +42,6 @@ ArmPlatformGetVirtualMemoryMap (
   )
 {
   ARM_MEMORY_REGION_ATTRIBUTES  CacheAttributes;
-  BOOLEAN                       bTrustzoneSupport;
   UINTN                         Index = 0;
   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
 
@@ -55,18 +52,10 @@ ArmPlatformGetVirtualMemoryMap (
       return;
   }
 
-  // Check if SMC TZASC is enabled. If Trustzone not enabled then all the entries remain in Secure World.
-  // As this value can be changed in the Board Configuration file, the UEFI firmware needs to work for both case
-  if (ArmPlatformTrustzoneSupported ()) {
-    bTrustzoneSupport = TRUE;
-  } else {
-      bTrustzoneSupport = FALSE;
-  }
-
   if (FeaturePcdGet(PcdCacheEnable) == TRUE) {
-      CacheAttributes = (bTrustzoneSupport ? DDR_ATTRIBUTES_CACHED : DDR_ATTRIBUTES_SECURE_CACHED);
+      CacheAttributes = DDR_ATTRIBUTES_CACHED;
   } else {
-      CacheAttributes = (bTrustzoneSupport ? DDR_ATTRIBUTES_UNCACHED : DDR_ATTRIBUTES_SECURE_UNCACHED);
+      CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
   }
 
   // ReMap (Either NOR Flash or DRAM)
@@ -74,12 +63,12 @@ ArmPlatformGetVirtualMemoryMap (
   VirtualMemoryTable[Index].VirtualBase  = ARM_VE_REMAP_BASE;
   VirtualMemoryTable[Index].Length       = ARM_VE_REMAP_SZ;
 
-  if (FeaturePcdGet(PcdNorFlashRemapping)) {
+  if (FeaturePcdGet(PcdNorFlashRemapping) == FALSE) {
     // Map the NOR Flash as Secure Memory
     if (FeaturePcdGet(PcdCacheEnable) == TRUE) {
-      VirtualMemoryTable[Index].Attributes   = DDR_ATTRIBUTES_SECURE_CACHED;
+      VirtualMemoryTable[Index].Attributes   = DDR_ATTRIBUTES_CACHED;
     } else {
-      VirtualMemoryTable[Index].Attributes   = DDR_ATTRIBUTES_SECURE_UNCACHED;
+      VirtualMemoryTable[Index].Attributes   = DDR_ATTRIBUTES_UNCACHED;
     }
   } else {
     // DRAM mapping
@@ -96,13 +85,13 @@ ArmPlatformGetVirtualMemoryMap (
   VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_ON_CHIP_PERIPH_BASE;
   VirtualMemoryTable[Index].VirtualBase  = ARM_VE_ON_CHIP_PERIPH_BASE;
   VirtualMemoryTable[Index].Length       = ARM_VE_ON_CHIP_PERIPH_SZ;
-  VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+  VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE;
 
   // SMB CS0-CS1 - NOR Flash 1 & 2
   VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_SMB_NOR0_BASE;
   VirtualMemoryTable[Index].VirtualBase  = ARM_VE_SMB_NOR0_BASE;
   VirtualMemoryTable[Index].Length       = ARM_VE_SMB_NOR0_SZ + ARM_VE_SMB_NOR1_SZ;
-  VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+  VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE;
 
   // SMB CS2 - SRAM
   VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_SMB_SRAM_BASE;
@@ -114,7 +103,7 @@ ArmPlatformGetVirtualMemoryMap (
   VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_SMB_PERIPH_BASE;
   VirtualMemoryTable[Index].VirtualBase  = ARM_VE_SMB_PERIPH_BASE;
   VirtualMemoryTable[Index].Length       = 2 * ARM_VE_SMB_PERIPH_SZ;
-  VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+  VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE;
 
 //TODO:This should be enabled for final release. Right now, ARM VE RTSM crashes.
 //  // If a Logic Tile is connected to The ARM Versatile Express Motherboard
@@ -122,7 +111,7 @@ ArmPlatformGetVirtualMemoryMap (
 //      VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_EXT_AXI_BASE;
 //      VirtualMemoryTable[Index].VirtualBase  = ARM_VE_EXT_AXI_BASE;
 //      VirtualMemoryTable[Index].Length       = ARM_VE_EXT_AXI_SZ;
-//      VirtualMemoryTable[Index].Attributes   = (bTrustzoneSupport ? ARM_MEMORY_REGION_ATTRIBUTE_DEVICE : ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE);
+//      VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_SECURE_DEVICE;
 //
 //      ASSERT((Index + 1) == (MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS + 1));
 //  } else {

ArmPlatformPkg/Include/Library/ArmPlatformLib.h

@@ -143,22 +143,6 @@ ArmPlatformBootRemapping (
   VOID
   );
 
-/**
-  Return if Trustzone is supported by your platform
-
-  A non-zero value must be returned if you want to support a Secure World on your platform.
-  ArmPlatformTrustzoneInit() will later set up the secure regions.
-  This function can return 0 even if Trustzone is supported by your processor. In this case,
-  the platform will continue to run in Secure World.
-
-  @return   A non-zero value if Trustzone supported.
-
-**/
-UINTN
-ArmPlatformTrustzoneSupported (
-  VOID
-  );
-
 /**
   Initialize the Secure peripherals and memory regions
 

ArmPlatformPkg/Sec/Sec.c

@@ -103,7 +103,7 @@ CEntryPoint (
   }
 
   // Test if Trustzone is supported on this platform
-  if (ArmPlatformTrustzoneSupported ()) {
+  if (FixedPcdGetBool (PcdTrustzoneSupport)) {
     // Ensure the Monitor Stack Base & Size have been set
     ASSERT(PcdGet32(PcdCPUCoresSecMonStackBase) != 0);
     ASSERT(PcdGet32(PcdCPUCoreSecMonStackSize) != 0);

ArmPlatformPkg/Sec/Sec.inf

@@ -51,6 +51,7 @@
   gArmPlatformTokenSpaceGuid.PcdSystemMemoryInitializeInSec
   
 [FixedPcd]
+  gArmTokenSpaceGuid.PcdTrustzoneSupport
   gArmTokenSpaceGuid.PcdVFPEnabled
   
   gArmTokenSpaceGuid.PcdArmPrimaryCoreMask