ArmPkg: Add Universal/Smbios/ProcessorSubClassDxe

ProcessorSubClassDxe provides SMBIOS CPU information using generic
methods combined with calls into OemMiscLib.

Signed-off-by: Rebecca Cran <rebecca@nuviainc.com>
Reviewed-by: Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>

ArmPkg/Universal/Smbios/ProcessorSubClassDxe/SmbiosProcessor.h

@@ -0,0 +1,102 @@
+/** @file
+  SMBIOS Processor Related Functions.
+
+  Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef SMBIOS_PROCESSOR_H_
+#define SMBIOS_PROCESSOR_H_
+
+#include <Uefi.h>
+#include <IndustryStandard/SmBios.h>
+
+/** Returns the maximum cache level implemented by the current CPU.
+
+    @return The maximum cache level implemented.
+**/
+UINT8
+SmbiosProcessorGetMaxCacheLevel (
+  VOID
+  );
+
+/** Returns whether or not the specified cache level has separate I/D caches.
+
+    @param CacheLevel The cache level (L1, L2 etc.).
+
+    @return TRUE if the cache level has separate I/D caches, FALSE otherwise.
+**/
+BOOLEAN
+SmbiosProcessorHasSeparateCaches (
+  UINT8 CacheLevel
+  );
+
+/** Gets the size of the specified cache.
+
+    @param CacheLevel       The cache level (L1, L2 etc.).
+    @param DataCache        Whether the cache is a dedicated data cache.
+    @param UnifiedCache     Whether the cache is a unified cache.
+
+    @return The cache size.
+**/
+UINT64
+SmbiosProcessorGetCacheSize (
+  IN UINT8   CacheLevel,
+  IN BOOLEAN DataCache,
+  IN BOOLEAN UnifiedCache
+  );
+
+/** Gets the associativity of the specified cache.
+
+    @param CacheLevel       The cache level (L1, L2 etc.).
+    @param DataCache        Whether the cache is a dedicated data cache.
+    @param UnifiedCache     Whether the cache is a unified cache.
+
+    @return The cache associativity.
+**/
+UINT32
+SmbiosProcessorGetCacheAssociativity (
+  IN UINT8   CacheLevel,
+  IN BOOLEAN DataCache,
+  IN BOOLEAN UnifiedCache
+  );
+
+/** Returns a value for the Processor ID field that conforms to SMBIOS
+    requirements.
+
+    @return Processor ID.
+**/
+UINT64
+SmbiosGetProcessorId (VOID);
+
+/** Returns the external clock frequency.
+
+    @return The external CPU clock frequency.
+**/
+UINTN
+SmbiosGetExternalClockFrequency (VOID);
+
+/** Returns the SMBIOS ProcessorFamily field value.
+
+    @return The value for the ProcessorFamily field.
+**/
+UINT8
+SmbiosGetProcessorFamily (VOID);
+
+/** Returns the ProcessorFamily2 field value.
+
+    @return The value for the ProcessorFamily2 field.
+**/
+UINT16
+SmbiosGetProcessorFamily2 (VOID);
+
+/** Returns the SMBIOS Processor Characteristics.
+
+    @return Processor Characteristics bitfield.
+**/
+PROCESSOR_CHARACTERISTIC_FLAGS
+SmbiosGetProcessorCharacteristics (VOID);
+
+#endif // SMBIOS_PROCESSOR_H_