1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
{-# LANGUAGE ForeignFunctionInterface #-}
{-# LANGUAGE CPP #-}
-- |
-- Module : System.Cpuid
-- License : BSD-style
-- Maintainer : Vincent Hanquez <vincent@snarc.org>
-- Stability : experimental
-- Portability : unknown
--
module System.Cpuid
( cpuidWithIndex
, cpuid
) where
import Data.Word
import Control.Applicative
import Foreign.C.Types
import Foreign.Ptr
import Foreign.Storable
import Foreign.Marshal.Alloc
#if defined(ARCH_X86) || defined(ARCH_X86_64)
foreign import ccall safe "cpuid" c_cpuid :: CUInt -> CUInt -> Ptr CUInt -> IO ()
-- | complete cpuid call with eax and ecx set.
cpuidWithIndex :: Word32 -> Word32 -> IO (Word32, Word32, Word32, Word32)
cpuidWithIndex eax ecx = allocaBytes 16 $ \ptr -> do
c_cpuid (fromIntegral eax) (fromIntegral ecx) ptr
(,,,) <$> peekW32 ptr <*> peekW32 (ptr `plusPtr` 4) <*> peekW32 (ptr `plusPtr` 8) <*> peekW32 (ptr `plusPtr` 12)
where peekW32 :: Ptr CUInt -> IO Word32
peekW32 ptr = fromIntegral <$> peek ptr
#else
cpuidWithIndex :: Word32 -> Word32 -> IO (Word32, Word32, Word32, Word32)
cpuidWithIndex _ _ = error "cpuid is not supported on non-x86 architecture"
#endif
-- | simple cpuid call.
cpuid :: Word32 -> IO (Word32, Word32, Word32, Word32)
cpuid eax = cpuidWithIndex eax 0
|
