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#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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