kern_return_t SMCReadKey(io_connect_t conn, const UInt32Char_t key, SMCVal_t *val)
{
kern_return_t result;
SMCKeyData_t inputStructure;
SMCKeyData_t outputStructure;
memset(&inputStructure, 0, sizeof(SMCKeyData_t));
memset(&outputStructure, 0, sizeof(SMCKeyData_t));
memset(val, 0, sizeof(SMCVal_t));
inputStructure.key = _strtoul(key, 4, 16);
snprintf(val->key, 5, "%s", key);
inputStructure.data8 = SMC_CMD_READ_KEYINFO;
result = SMCCall(conn, KERNEL_INDEX_SMC, &inputStructure, &outputStructure);
if (result != kIOReturnSuccess)
return result;
val->dataSize = outputStructure.keyInfo.dataSize;
_ultostr(val->dataType, outputStructure.keyInfo.dataType);
inputStructure.keyInfo.dataSize = val->dataSize;
inputStructure.data8 = SMC_CMD_READ_BYTES;
result = SMCCall(conn, KERNEL_INDEX_SMC, &inputStructure, &outputStructure);
if (result != kIOReturnSuccess)
return result;
memcpy(val->bytes, outputStructure.bytes, sizeof(outputStructure.bytes));
return kIOReturnSuccess;
}
kern_return_t SMCReadKey(io_connect_t conn, const UInt32Char_t key, SMCVal_t *val)
{
kern_return_t result;
SMCKeyData_t inputStructure;
SMCKeyData_t outputStructure;
memset(&inputStructure, 0, sizeof(SMCKeyData_t));
memset(&outputStructure, 0, sizeof(SMCKeyData_t));
memset(val, 0, sizeof(SMCVal_t));
inputStructure.key = _strtoul(key, 4, 16);
//REVEIW_REHABMAN: mempcy used to avoid deprecated strcpy...
//strcpy(val->key, key);
memcpy(val->key, key, sizeof(val->key));
result = SMCGetKeyInfo(conn, inputStructure.key, &outputStructure.keyInfo);
if (result != kIOReturnSuccess)
return result;
val->dataSize = outputStructure.keyInfo.dataSize;
_ultostr(val->dataType, outputStructure.keyInfo.dataType);
inputStructure.keyInfo.dataSize = val->dataSize;
inputStructure.data8 = SMC_CMD_READ_BYTES;
result = SMCCall(conn, KERNEL_INDEX_SMC, &inputStructure, &outputStructure);
if (result != kIOReturnSuccess)
return result;
memcpy(val->bytes, outputStructure.bytes, sizeof(outputStructure.bytes));
return kIOReturnSuccess;
}
// Provides key info, using a cache to dramatically improve the energy impact of smcFanControl
kern_return_t SMCGetKeyInfo(io_connect_t conn, UInt32 key, SMCKeyData_keyInfo_t* keyInfo)
{
SMCKeyData_t inputStructure;
SMCKeyData_t outputStructure;
kern_return_t result = kIOReturnSuccess;
int i = 0;
OSSpinLockLock(&g_keyInfoSpinLock);
for (; i < g_keyInfoCacheCount; ++i)
{
if (key == g_keyInfoCache[i].key)
{
*keyInfo = g_keyInfoCache[i].keyInfo;
break;
}
}
if (i == g_keyInfoCacheCount)
{
// Not in cache, must look it up.
memset(&inputStructure, 0, sizeof(inputStructure));
memset(&outputStructure, 0, sizeof(outputStructure));
inputStructure.key = key;
inputStructure.data8 = SMC_CMD_READ_KEYINFO;
result = SMCCall(conn, KERNEL_INDEX_SMC, &inputStructure, &outputStructure);
if (result == kIOReturnSuccess)
{
*keyInfo = outputStructure.keyInfo;
if (g_keyInfoCacheCount < KEY_INFO_CACHE_SIZE)
{
g_keyInfoCache[g_keyInfoCacheCount].key = key;
g_keyInfoCache[g_keyInfoCacheCount].keyInfo = outputStructure.keyInfo;
++g_keyInfoCacheCount;
}
}
}
OSSpinLockUnlock(&g_keyInfoSpinLock);
return result;
}
kern_return_t SMCWriteKeyUnsafe(io_connect_t conn, const SMCVal_t *val)
{
kern_return_t result;
SMCKeyData_t inputStructure;
SMCKeyData_t outputStructure;
memset(&inputStructure, 0, sizeof(SMCKeyData_t));
memset(&outputStructure, 0, sizeof(SMCKeyData_t));
inputStructure.key = _strtoul(val->key, 4, 16);
inputStructure.data8 = SMC_CMD_WRITE_BYTES;
inputStructure.keyInfo.dataSize = val->dataSize;
memcpy(inputStructure.bytes, val->bytes, sizeof(val->bytes));
result = SMCCall(conn, KERNEL_INDEX_SMC, &inputStructure, &outputStructure);
if (result != kIOReturnSuccess)
return result;
return kIOReturnSuccess;
}
