ArmPkg/Universal/Smbios/ProcessorSubClassDxe/SmbiosProcessorArm.c

   1 /** @file
   2   Functions for ARM 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   CCSIDR2_DATA  Ccsidr2;
  33   CSSELR_DATA   Csselr;
  34   BOOLEAN       CcidxSupported;
  35   UINT64        CacheSize;
  36
  37   // Read the CCSIDR register to get the cache architecture
  38   Csselr.Data       = 0;
  39   Csselr.Bits.Level = CacheLevel - 1;
  40   Csselr.Bits.InD   = (!DataCache && !UnifiedCache);
  41
  42   Ccsidr.Data = ReadCCSIDR (Csselr.Data);
  43
  44   CcidxSupported = ArmHasCcidx ();
  45
  46   if (CcidxSupported) {
  47     Ccsidr2.Data = ReadCCSIDR2 (Csselr.Data);
  48     CacheSize    = (1 << (Ccsidr.BitsCcidxAA32.LineSize + 4)) *
  49                    (Ccsidr.BitsCcidxAA32.Associativity + 1) *
  50                    (Ccsidr2.Bits.NumSets + 1);
  51   } else {
  52     CacheSize = (1 << (Ccsidr.BitsNonCcidx.LineSize + 4)) *
  53                 (Ccsidr.BitsNonCcidx.Associativity + 1) *
  54                 (Ccsidr.BitsNonCcidx.NumSets + 1);
  55   }
  56
  57   return CacheSize;
  58 }
  59
  60 /** Gets the associativity of the specified cache.
  61
  62     @param CacheLevel       The cache level (L1, L2 etc.).
  63     @param DataCache        Whether the cache is a dedicated data cache.
  64     @param UnifiedCache     Whether the cache is a unified cache.
  65
  66     @return The cache associativity.
  67 **/
  68 UINT32
  69 SmbiosProcessorGetCacheAssociativity (
  70   IN UINT8    CacheLevel,
  71   IN BOOLEAN  DataCache,
  72   IN BOOLEAN  UnifiedCache
  73   )
  74 {
  75   CCSIDR_DATA  Ccsidr;
  76   CSSELR_DATA  Csselr;
  77   BOOLEAN      CcidxSupported;
  78   UINT32       Associativity;
  79
  80   // Read the CCSIDR register to get the cache architecture
  81   Csselr.Data       = 0;
  82   Csselr.Bits.Level = CacheLevel - 1;
  83   Csselr.Bits.InD   = (!DataCache && !UnifiedCache);
  84
  85   Ccsidr.Data = ReadCCSIDR (Csselr.Data);
  86
  87   CcidxSupported = ArmHasCcidx ();
  88
  89   if (CcidxSupported) {
  90     Associativity = Ccsidr.BitsCcidxAA32.Associativity + 1;
  91   } else {
  92     Associativity = Ccsidr.BitsNonCcidx.Associativity + 1;
  93   }
  94
  95   return Associativity;
  96 }