#ifndef CCAN_CPUID_H
#define CCAN_CPUID_H
+#include <stdbool.h>
+#include <stdint.h>
+
/**
- * enum cpuid - stuff to get information on from the CPU.
+ * enum cpuid - stuff to get information about from the CPU.
*
* This is used as a parameter in cpuid().
*
CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED = 0x80000000,
CPU_EXTENDED_PROC_INFO_FEATURE_BITS = 0x80000001,
- CPU_PROC_BRAND_STRING = 0x80000002,
+ CPU_PROC_BRAND_STRING = 0x80000002,
CPU_L1_CACHE_AND_TLB_IDS = 0x80000005,
CPU_EXTENDED_L2_CACHE_FEATURES = 0x80000006,
CPU_ADV_POWER_MGT_INFO = 0x80000007,
CPU_VIRT_PHYS_ADDR_SIZES = 0x80000008
} cpuid_t;
-/**
- * enum cpufeature
- *
- * This is used by cpuid_has_feature().
- *
- * CF_MMX:
- * Test for MMX support.
- *
- * CF_SSE*:
- * Test for SSE* support.
- *
- * CF_AVX:
- * Test for AVX support.
- *
- * CF_FMA:
- * Test for FMA support.
- */
-
-typedef enum cpufeature {
- CF_MMX = 1 << 23,
- CF_SSE = 1 << 25,
- CF_SSE2 = 1 << 26,
- CF_SSE3 = 1 << 0,
+#define CF_MMX 0
+#define CF_SSE 1
+#define CF_SSE2 2
+#define CF_SSE3 3
+#define CF_FPU 4
+#define CF_TSC 5
+#define CF_MSR 6
+#define CF_SSSE3 7
+#define CF_AVX 8
+#define CF_FMA 9
- CF_SSSE3 = 1 << 9,
- CF_SSE41 = 1 << 19,
- CF_SSE42 = 1 << 20,
+#define CEF_x64 10
+#define CEF_FPU 11
+#define CEF_DE 12
+#define CEF_SYSCALLRET 13
+#define CEF_CMOV 14
+#define CEF_SSE4a 15
+#define CEF_FMA4 16
+#define CEF_XOP 17
- CF_AVX = 1 << 28,
- CF_FMA = 1 << 12
-} cpufeature_t;
-
-/**
- * enum cpuextfeature - Test for an extended feature provided by the CPU
- *
- * This is used by cpuid_has_ext_feature()
- *
- * CEF_x64:
- * Test for 64-bits.
- *
- * CEF_SSE4a:
- * CEF_FMA4:
- * CEF_XOP:
- * Test for SSE4a/FMA4/XOP
- */
-typedef enum cpuextfeature {
- CEF_x64 = 1 << 29,
- CEF_SSE4a = 1 << 6,
- CEF_FMA4 = 1 << 16,
- CEF_XOP = 1 << 11
-} cpuextfeature_t;
-
-/**
- * enum cputype - CPU type
- *
- * Warning, do not change this order or odd stuff may happen.
- */
typedef enum cputype {
CT_NONE,
CT_AMDK5,
CT_KVM
} cputype_t;
+#if defined(__i386__) || defined(__i386) || defined(__x86_64) \
+ || defined(_M_AMD64) || defined(__M_X64)
+
/**
- * get_cpu_type - Get CPU Type
+ * cpuid_get_cpu_type - Get CPU Type
*
* Returns the CPU Type as cputype_t.
+ *
+ * See also: cpuid_get_cpu_type_string()
*/
-cputype_t get_cpu_type(void);
+#define is_intel_cpu() cpuid_get_cpu_type() == CT_INTEL
+#define is_amd_cpu() cpuid_get_cpu_type() == CT_AMDK5 || cpuid_get_cpu_type() == CT_AMD
+cputype_t cpuid_get_cpu_type(void);
/**
- * get_cpu_type_string - Get CPU Type string
+ * cpuid_sprintf_cputype - Get CPU Type string
+ * @cputype: a char of atleast 12 bytes in it.
*
- * Returns the CPU type string based off cputype_t.
+ * Returns true on success, false on failure
*/
-const char *get_cpu_type_string(const cputype_t cputype);
+bool cpuid_sprintf_cputype(const cputype_t cputype, char *buf);
/**
* cpuid_is_supported - test if the CPUID instruction is supported
*
* CPUID is not supported by old CPUS.
*
- * Returns 1 if the cpuid instruction is supported, 0 otherwise.
+ * Returns true if the cpuid instruction is supported, false otherwise.
*
* See also: cpuid()
*/
-int cpuid_is_supported(void);
+bool cpuid_is_supported(void);
/**
- * highest_ext_func_supported - Get the highest extended function supported
+ * cpuid_highest_ext_func_supported - Get the highest extended function supported
*
*
* Returns the highest extended function supported.
*
* See also: cpuid()
*/
-int highest_ext_func_supported(void);
+uint32_t cpuid_highest_ext_func_supported(void);
/**
* cpuid - Get Some information from the CPU.
* Returns a string into buf.
*
* For CPU_PROCINFO_AND_FEATUREBITS:
- * buf[0]:
- * - 3:0 - Stepping
- * - 7:4 - Model
- * - 11:8 - Family
- * - 13:12 - Processor Type
- * - 19:16 - Extended Model
- * - 27:20 - Extended family
- * buf[1] and buf[2]:
+ * buf[0]: Stepping
+ * buf[1]: Model
+ * buf[2]: Family
+ * buf[3]: Extended Model
+ * buf[4]: Extended Family
+ * buf[5] and buf[6]:
* Feature flags
- * buf[3]:
+ * buf[7]:
* Additional feature information.
*
+ * For CPU_L1_CACHE_AND_TLB_IDS:
+ * buf[0]: (eax):
+ * - 7..0 Number of times to exec cpuid to get all descriptors.
+ * - 15..8 Instruction TLB: 4K Pages, 4-way set associtive, 128 entries.
+ * - 23..16 Data TLB: 4k Pages, 4-way set associtive, 128 entries.
+ * - 24..31 Instruction TLB: 4K Pages, 4-way set associtive, 2 entries.
+ * buf[1]: (ebx):
+ * - 7..0 64-byte prefetching
+ * - 8..31 Null descriptor
+ * buf[2]: (ecx):
+ * - 0..31 Null descriptor
+ * buf[3]: (edx):
+ * - 7..0 2nd-level cache, 2M, 8-way set associtive, 64-byte line size
+ * - 15..8 1st-level instruction cache: 32K, 8-way set associtive, 64 byte line size
+ * - 16..23 Data TLB: 4M Pages, 4-way set associtive, 8 entires.
+ * - 24..31 1st-level data cache: 32K, 8-way set associtive, 64 byte line size
+ *
* For CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED:
* Returns the highest supported function in *buf (expects an integer ofc)
*
* For CPU_EXTENDED_PROC_INFO_FEATURE_BITS:
* Returns them in buf[0] and buf[1].
*
+ * For CPU_EXTENDED_L2_CACHE_FEATURES:
+ * buf[0]: Line size
+ * buf[1]: Associativity
+ * buf[2]: Cache size.
+ *
* For CPU_VIRT_PHYS_ADDR_SIZES:
- * Returns it as an integer in *buf.
+ * buf[0]: Physical
+ * buf[1]: Virtual
*
* For CPU_PROC_BRAND_STRING:
* Have a char array with at least 48 bytes assigned to it.
*
+ * Here's a page which will help you parse the data provided by this function.
+ * http://www.flounder.com/cpuid_explorer2.htm
+ *
* If an invalid flag has been passed a 0xbaadf00d is returned in *buf.
*/
-void cpuid(cpuid_t info, void *buf);
+void cpuid(cpuid_t info, uint32_t *buf);
/**
* cpuid_test_feature - Test if @feature is available
*
- * Returns 1 if feature is supported, 0 otherwise.
+ * Returns true if feature is supported, false otherwise.
*
* The feature parameter must be >= CPU_EXTENDED_PROC_INFO_FEATURE_BITS
* and <= CPU_VIRT_PHYS_ADDR_SIZES.
*/
-int cpuid_test_feature(cpuid_t feature);
+bool cpuid_test_feature(cpuid_t feature);
/**
* cpuid_has_feature - Test if @feature is supported
*
- * Test if the CPU supports MMX/SSE* etc
+ * Test if the CPU supports MMX/SSE* etc.
+ * For the extended parameter, usually you want to pass it as
+ * false if you're not passing CEF_*.
*
- * Returns 1 if the feature is available, 0 otherwise.
- */
-#define cpuid_has_mmx() cpuid_has_feature(CF_MMX)
-#define cpuid_has_sse() cpuid_has_feature(CF_SSE)
-#define cpuid_has_sse2() cpuid_has_feature(CF_SSE2)
-#define cpuid_has_sse3() cpuid_has_feature(CF_SSE3)
-#define cpuid_has_ssse3() cpuid_has_feature(CF_SSSE3)
-#define cpuid_has_sse41() cpuid_has_feature(CF_SSE41)
-#define cpuid_has_sse42() cpuid_has_feature(CF_SSE42)
-#define cpuid_has_avx() cpuid_has_feature(CF_AVX)
-#define cpuid_has_fma() cpuid_has_feature(CF_FMA)
-int cpuid_has_feature(cpufeature_t feature);
-
-/**
- * cpuid_has_ext_feature - Test if @extfeature is an extended feature
- * that's supported by the CPU.
- *
- * Test if the CPU supports this extended feature.
+ * For more information about the CPU extended features, have a look
+ * at:
+ * http://en.wikipedia.org/wiki/CPUID
*
- * Returns 1 if available, 0 otherwise.
+ * Returns true if the feature is available, false otherwise.
*/
-#define cpuid_has_x64() cpuid_has_ext_feature(CEF_x64)
-#define cpuid_has_sse4a() cpuid_has_ext_feature(CEF_SSE4a)
-#define cpuid_has_fma4() cpuid_has_ext_feature(CEF_FMA4)
-#define cpuid_has_xop() cpuid_has_ext_feature(CEF_XOP)
-int cpuid_has_ext_feature(cpuextfeature_t extfeature);
+#define cpuid_has_mmx() cpuid_has_feature(CF_MMX, false)
+#define cpuid_has_sse() cpuid_has_feature(CF_SSE, false)
+#define cpuid_has_sse2() cpuid_has_feature(CF_SSE2, false)
+#define cpuid_has_sse3() cpuid_has_feature(CF_SSE3, false)
+#define cpuid_has_ssse3() cpuid_has_feature(CF_SSSE3, false)
+#define cpuid_has_avx() cpuid_has_feature(CF_AVX, false)
+#define cpuid_has_fma() cpuid_has_feature(CF_FMA, false)
+#define cpuid_has_x64() cpuid_has_feature(CEF_x64, true)
+#define cpuid_has_sse4a() cpuid_has_feature(CEF_SSE4a, true)
+#define cpuid_has_fma4() cpuid_has_feature(CEF_FMA4, true)
+#define cpuid_has_xop() cpuid_has_feature(CEF_XOP, true)
+bool cpuid_has_feature(int feature, bool extended);
-#endif
+#else
+#include <ccan/build_assert/build_assert.h>
+
+#define cpuid_get_cpu_type() BUILD_ASSERT_OR_ZERO(0)
+#define cpuid_get_cpu_type_string() BUILD_ASSERT_OR_ZERO(0)
+#define cpuid_is_supported() BUILD_ASSERT_OR_ZERO(0)
+#define cpuid(info, buf) BUILD_ASSERT_OR_ZERO(0)
+
+#define cpuid_highest_ext_func_supported() BUILD_ASSERT_OR_ZERO(0)
+#define cpuid_test_feature(feature) BUILD_ASSERT_OR_ZERO(0)
+#define cpuid_has_feature(feature, ext) BUILD_ASSERT_OR_ZERO(0)
+
+#endif
+#endif
projects / ccan / blobdiff