From 76424950e373d3b04ac3dd13019151bfba3e8423 Mon Sep 17 00:00:00 2001
From: sumuel <samuel@yakubos.org>
Date: Mon, 17 Aug 2026 20:44:55 +0000
Subject: Add the files

---
 src/detection/cpucache/cpucache_shared.c | 82 ++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 src/detection/cpucache/cpucache_shared.c

(limited to 'src/detection/cpucache/cpucache_shared.c')

diff --git a/src/detection/cpucache/cpucache_shared.c b/src/detection/cpucache/cpucache_shared.c
new file mode 100644
index 0000000..c13e351
--- /dev/null
+++ b/src/detection/cpucache/cpucache_shared.c
@@ -0,0 +1,82 @@
+#include "cpucache.h"
+#include "common/smbios.h"
+#include "common/strutil.h"
+
+typedef struct FFSmbiosCacheInfo {
+    FFSmbiosHeader Header;
+
+    uint8_t SocketDesignation;   // string
+    uint16_t CacheConfiguration; // varies
+    uint16_t MaximumCacheSize;   // varies
+    uint16_t InstalledSize;      // varies
+    uint16_t SupportedSramType;  // bit field
+    uint16_t CurrentSramType;    // bit field
+
+    // 2.1+
+    uint8_t CacheSpeed;          // varies
+    uint8_t ErrorCorrectionType; // enum
+    uint8_t SystemCacheType;     // enum
+    uint8_t Associativity;       // enum
+
+    // 3.1+
+    uint32_t MaximumCacheSize2;   // bit field
+    uint32_t InstalledCacheSize2; // bit field
+} FF_A_PACKED FFSmbiosCacheInfo;
+
+static_assert(offsetof(FFSmbiosCacheInfo, InstalledCacheSize2) == 0x17,
+    "FFSmbiosCacheInfo: Wrong struct alignment");
+
+const char* ffDetectCPUCache(FFCPUCacheResult* result) {
+    const FFSmbiosHeaderTable* smbiosTable = ffGetSmbiosHeaderTable();
+    if (!smbiosTable) {
+        return "Failed to get SMBIOS data";
+    }
+
+    const FFSmbiosCacheInfo* data = (const FFSmbiosCacheInfo*) (*smbiosTable)[FF_SMBIOS_TYPE_CACHE_INFO];
+    if (!data) {
+        return "Cache information is not found in SMBIOS data";
+    }
+
+    const FFSmbiosCacheInfo* endOfTable = (const FFSmbiosCacheInfo*) (*smbiosTable)[FF_SMBIOS_TYPE_END_OF_TABLE];
+    for (; data != endOfTable; data = (const FFSmbiosCacheInfo*) ffSmbiosNextEntry(&data->Header)) {
+        if (data->Header.Type != FF_SMBIOS_TYPE_CACHE_INFO) {
+            continue;
+        }
+
+        bool enabled = !!(data->CacheConfiguration & (1 << 7));
+        if (!enabled) {
+            continue;
+        }
+
+        uint32_t size = data->InstalledSize;
+        if (size == 0) {
+            continue;
+        }
+
+        if (data->InstalledSize != 0xFFFF) {
+            size *= (size >> 15 ? 64 : 1) * 1024u;
+        } else if (data->Header.Length > offsetof(FFSmbiosCacheInfo, InstalledCacheSize2)) {
+            size = data->InstalledCacheSize2;
+            size *= (size >> 31 ? 64 : 1) * 1024u;
+        }
+
+        uint32_t level = (data->CacheConfiguration & 0b111u) + 1;
+
+        FFCPUCacheType type;
+        switch (data->SystemCacheType) {
+            case 3:
+                type = FF_CPU_CACHE_TYPE_INSTRUCTION;
+                break;
+            case 4:
+                type = FF_CPU_CACHE_TYPE_DATA;
+                break;
+            default:
+                type = FF_CPU_CACHE_TYPE_UNIFIED;
+                break;
+        }
+
+        ffCPUCacheAddItem(result, level, size, 0, type);
+    }
+
+    return NULL;
+}
-- 
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