1 files changed, 85 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Include/Library/CpuCacheInfoLib.h b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Include/Library/CpuCacheInfoLib.h
new file mode 100644
index 00000000..67b0fb40
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Include/Library/CpuCacheInfoLib.h
@@ -0,0 +1,85 @@
+/** @file
+  Header file for CPU Cache info Library.
+
+  Copyright (c) 2020 - 2021, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _CPU_CACHE_INFO_LIB_H_
+#define _CPU_CACHE_INFO_LIB_H_
+
+typedef struct {
+  //
+  // Package number.
+  //
+  UINT32        Package;
+  //
+  // Core type of logical processor.
+  // Value = CPUID.1Ah:EAX[31:24]
+  //
+  UINT8         CoreType;
+  //
+  // Level of the cache that this package's this type of logical processor corresponds to.
+  // Value = CPUID.04h:EAX[07:05]
+  //
+  UINT8         CacheLevel : 3;
+  //
+  // Type of the cache that this package's this type of logical processor corresponds to.
+  // Value = CPUID.04h:EAX[04:00]
+  //
+  UINT8         CacheType : 5;
+  //
+  // Ways of associativity.
+  // Value = CPUID.04h:EBX[31:22]
+  //
+  UINT16        CacheWays : 10;
+  //
+  // Fully associative cache.
+  // Value = CPUID.04h:EAX[09]
+  //
+  UINT16        FullyAssociativeCache : 1;
+  //
+  // Direct mapped cache.
+  // Value = CPUID.04h:EDX[02]
+  //
+  UINT16        DirectMappedCache : 1;
+  UINT16        Reserved : 4;
+  //
+  // Size of single cache that this package's this type of logical processor corresponds to.
+  // Value = (CPUID.04h:EBX[31:22] + 1) * (CPUID.04h:EBX[21:12] + 1) *
+  //         (CPUID.04h:EBX[11:00] + 1) * (CPUID.04h:ECX[31:00] + 1)
+  //
+  UINT32        CacheSizeinKB;
+  //
+  // Number of the cache that this package's this type of logical processor corresponds to.
+  // Have subtracted the number of caches that are shared.
+  //
+  UINT16        CacheCount;
+} CPU_CACHE_INFO;
+
+/**
+  Get CpuCacheInfo data array.
+
+  @param[in, out] CpuCacheInfo        Pointer to the CpuCacheInfo array.
+  @param[in, out] CpuCacheInfoCount   As input, point to the length of response CpuCacheInfo array.
+                                      As output, point to the actual length of response CpuCacheInfo array.
+
+  @retval         EFI_SUCCESS             Function completed successfully.
+  @retval         EFI_INVALID_PARAMETER   CpuCacheInfoCount is NULL.
+  @retval         EFI_INVALID_PARAMETER   CpuCacheInfo is NULL while CpuCacheInfoCount contains the value
+                                          greater than zero.
+  @retval         EFI_UNSUPPORTED         Processor does not support CPUID_CACHE_PARAMS Leaf.
+  @retval         EFI_OUT_OF_RESOURCES    Required resources could not be allocated.
+  @retval         EFI_BUFFER_TOO_SMALL    CpuCacheInfoCount is too small to hold the response CpuCacheInfo
+                                          array. CpuCacheInfoCount has been updated with the length needed
+                                          to complete the request.
+**/
+EFI_STATUS
+EFIAPI
+GetCpuCacheInfo (
+  IN OUT CPU_CACHE_INFO     *CpuCacheInfo,
+  IN OUT UINTN              *CpuCacheInfoCount
+  );
+
+#endif