ArmPkg: Create MpCoreInfo PPI and HOB to describe CPU Cores on a MPCore platform

These info are:
- ClusterId, CoreId
- MailBox Set/Get/Clear address



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12423 6f19259b-4bc3-4df7-8a09-765794883524

ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEb.c

@@ -20,8 +20,33 @@
 #include <Drivers/PL341Dmc.h>
 #include <Drivers/SP804Timer.h>
 
+#include <Ppi/ArmMpCoreInfo.h>
+
 #include <ArmPlatform.h>
 
+ARM_CORE_INFO mRealViewEbMpCoreInfoTable[] = {
+  {
+    // Cluster 0, Core 0
+    0x0, 0x0,
+
+    // MP Core MailBox Set/Get/Clear Addresses and Clear Value
+    (EFI_PHYSICAL_ADDRESS)ARM_EB_SYS_FLAGS_REG,
+    (EFI_PHYSICAL_ADDRESS)ARM_EB_SYS_FLAGS_SET_REG,
+    (EFI_PHYSICAL_ADDRESS)ARM_EB_SYS_FLAGS_CLR_REG,
+    (UINT64)0xFFFFFFFF
+  },
+  {
+    // Cluster 0, Core 1
+    0x0, 0x1,
+
+    // MP Core MailBox Set/Get/Clear Addresses and Clear Value
+    (EFI_PHYSICAL_ADDRESS)ARM_EB_SYS_FLAGS_REG,
+    (EFI_PHYSICAL_ADDRESS)ARM_EB_SYS_FLAGS_SET_REG,
+    (EFI_PHYSICAL_ADDRESS)ARM_EB_SYS_FLAGS_CLR_REG,
+    (UINT64)0xFFFFFFFF
+  }
+};
+
 /**
   Return if Trustzone is supported by your platform
 
@@ -107,13 +132,41 @@ ArmPlatformInitializeSystemMemory (
 {
   // We do not need to initialize the System Memory on RTSM
 }
+
+EFI_STATUS
+PrePeiCoreGetMpCoreInfo (
+  OUT UINTN                   *CoreCount,
+  OUT ARM_CORE_INFO           **ArmCoreTable
+  )
+{
+  if ((MmioRead32 (ARM_EB_SYS_PROCID0_REG) & ARM_EB_SYS_PROC_ID_MASK) == ARM_EB_SYS_PROC_ID_CORTEX_A9) {
+    *CoreCount    = sizeof(mRealViewEbMpCoreInfoTable) / sizeof(ARM_CORE_INFO);
+    *ArmCoreTable = mRealViewEbMpCoreInfoTable;
+    return EFI_SUCCESS;
+  } else {
+    return EFI_UNSUPPORTED;
+  }
+}
+
+// Needs to be declared in the file. Otherwise gArmMpCoreInfoPpiGuid is undefined in the contect of PrePeiCore
+EFI_GUID mArmMpCoreInfoPpiGuid = ARM_MP_CORE_INFO_PPI_GUID;
+ARM_MP_CORE_INFO_PPI mMpCoreInfoPpi = { PrePeiCoreGetMpCoreInfo };
+
+EFI_PEI_PPI_DESCRIPTOR      gPlatformPpiTable[] = {
+  {
+    EFI_PEI_PPI_DESCRIPTOR_PPI,
+    &mArmMpCoreInfoPpiGuid,
+    &mMpCoreInfoPpi
+  }
+};
+
 VOID
 ArmPlatformGetPlatformPpiList (
   OUT UINTN                   *PpiListSize,
   OUT EFI_PEI_PPI_DESCRIPTOR  **PpiList
   )
 {
-  *PpiListSize = 0;
-  *PpiList = NULL;
+  *PpiListSize = sizeof(gPlatformPpiTable);
+  *PpiList = gPlatformPpiTable;
 }