ArmPkg/Universal/Smbios/ProcessorSubClassDxe/SmbiosProcessorAArch64.c

   1 /** @file
   2   Functions for AARCH64 processor information
   3
   4   Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
   5
   6   SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include <Uefi.h>
  11 #include <IndustryStandard/ArmCache.h>
  12 #include <Library/ArmLib.h>
  13
  14 #include "SmbiosProcessor.h"
  15
  16 /** Gets the size of the specified cache.
  17
  18     @param CacheLevel       The cache level (L1, L2 etc.).
  19     @param DataCache        Whether the cache is a dedicated data cache.
  20     @param UnifiedCache     Whether the cache is a unified cache.
  21
  22     @return The cache size.
  23 **/
  24 UINT64
  25 SmbiosProcessorGetCacheSize (
  26   IN UINT8    CacheLevel,
  27   IN BOOLEAN  DataCache,
  28   IN BOOLEAN  UnifiedCache
  29   )
  30 {
  31   CCSIDR_DATA  Ccsidr;
  32   CSSELR_DATA  Csselr;
  33   BOOLEAN      CcidxSupported;
  34   UINT64       CacheSize;
  35
  36   Csselr.Data       = 0;
  37   Csselr.Bits.Level = CacheLevel - 1;
  38   Csselr.Bits.InD   = (!DataCache && !UnifiedCache);
  39
  40   Ccsidr.Data = ReadCCSIDR (Csselr.Data);
  41
  42   CcidxSupported = ArmHasCcidx ();
  43
  44   if (CcidxSupported) {
  45     CacheSize = (1 << (Ccsidr.BitsCcidxAA64.LineSize + 4)) *
  46                 (Ccsidr.BitsCcidxAA64.Associativity + 1) *
  47                 (Ccsidr.BitsCcidxAA64.NumSets + 1);
  48   } else {
  49     CacheSize = (1 << (Ccsidr.BitsNonCcidx.LineSize + 4)) *
  50                 (Ccsidr.BitsNonCcidx.Associativity + 1) *
  51                 (Ccsidr.BitsNonCcidx.NumSets + 1);
  52   }
  53
  54   return CacheSize;
  55 }
  56
  57 /** Gets the associativity of the specified cache.
  58
  59     @param CacheLevel       The cache level (L1, L2 etc.).
  60     @param DataCache        Whether the cache is a dedicated data cache.
  61     @param UnifiedCache     Whether the cache is a unified cache.
  62
  63     @return The cache associativity.
  64 **/
  65 UINT32
  66 SmbiosProcessorGetCacheAssociativity (
  67   IN UINT8    CacheLevel,
  68   IN BOOLEAN  DataCache,
  69   IN BOOLEAN  UnifiedCache
  70   )
  71 {
  72   CCSIDR_DATA  Ccsidr;
  73   CSSELR_DATA  Csselr;
  74   BOOLEAN      CcidxSupported;
  75   UINT32       Associativity;
  76
  77   Csselr.Data       = 0;
  78   Csselr.Bits.Level = CacheLevel - 1;
  79   Csselr.Bits.InD   = (!DataCache && !UnifiedCache);
  80
  81   Ccsidr.Data = ReadCCSIDR (Csselr.Data);
  82
  83   CcidxSupported = ArmHasCcidx ();
  84
  85   if (CcidxSupported) {
  86     Associativity = Ccsidr.BitsCcidxAA64.Associativity + 1;
  87   } else {
  88     Associativity = Ccsidr.BitsNonCcidx.Associativity + 1;
  89   }
  90
  91   return Associativity;
  92 }