#ifndef CCAN_CPUID_H
#define CCAN_CPUID_H
+#include <stdbool.h>
+#include <stdint.h>
+
/**
* enum cpuid - stuff to get information on from the CPU.
*
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,
CT_KVM
} cputype_t;
+#if defined(__i386__) || defined(__i386) || defined(__x86_64) \
+ || defined(_M_AMD64) || defined(__M_X64)
+
/**
* cpuid_get_cpu_type - Get CPU Type
*
*
* 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);
/**
* cpuid_highest_ext_func_supported - Get the highest extended function supported
*
* See also: cpuid()
*/
-int cpuid_highest_ext_func_supported(void);
+uint32_t cpuid_highest_ext_func_supported(void);
/**
* cpuid - Get Some information from the CPU.
* buf[3]:
* 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_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.
* For the extended parameter, usually you want to pass it as
- * 0 if you're not passing CEF_*.
+ * false if you're not passing CEF_*.
*
* For more information about the CPU extended features, have a look
* at:
* http://en.wikipedia.org/wiki/CPUID
*
- * Returns 1 if the feature is available, 0 otherwise.
+ * Returns true if the feature is available, false otherwise.
*/
-#define cpuid_has_mmx() cpuid_has_feature(CF_MMX, 0)
-#define cpuid_has_sse() cpuid_has_feature(CF_SSE, 0)
-#define cpuid_has_sse2() cpuid_has_feature(CF_SSE2, 0)
-#define cpuid_has_sse3() cpuid_has_feature(CF_SSE3, 0)
-#define cpuid_has_ssse3() cpuid_has_feature(CF_SSSE3, 0)
-#define cpuid_has_avx() cpuid_has_feature(CF_AVX, 0)
-#define cpuid_has_fma() cpuid_has_feature(CF_FMA, 0)
-#define cpuid_has_x64() cpuid_has_feature(CEF_x64, 1)
-#define cpuid_has_sse4a() cpuid_has_feature(CEF_SSE4a, 1)
-#define cpuid_has_fma4() cpuid_has_feature(CEF_FMA4, 1)
-#define cpuid_has_xop() cpuid_has_feature(CEF_XOP, 1)
-int cpuid_has_feature(int feature, int extended);
+#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);
+
+#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