]> git.ozlabs.org Git - ccan/commitdiff
Merge branch 'cpuid' of https://github.com/decltype/ccan
authorRusty Russell <rusty@rustcorp.com.au>
Fri, 27 Sep 2013 18:40:40 +0000 (04:10 +0930)
committerRusty Russell <rusty@rustcorp.com.au>
Fri, 27 Sep 2013 18:40:40 +0000 (04:10 +0930)
Makefile-ccan
ccan/cpuid/BSD-MIT [new symlink]
ccan/cpuid/_info [new file with mode: 0644]
ccan/cpuid/cpuid.c [new file with mode: 0644]
ccan/cpuid/cpuid.h [new file with mode: 0644]
ccan/cpuid/test/run.c [new file with mode: 0644]

index d81031eab1add188d4ac71220a422edd1524e869..86d6ac0c44e3ca149d1e0fefb2448379bf5df4d3 100644 (file)
@@ -42,6 +42,7 @@ MODS_WITH_SRC := antithread \
        ciniparser \
        crc \
        crcsync \
+       cpuid \
        daemonize \
        daemon_with_notify \
        dgraph \
diff --git a/ccan/cpuid/BSD-MIT b/ccan/cpuid/BSD-MIT
new file mode 120000 (symlink)
index 0000000..2354d12
--- /dev/null
@@ -0,0 +1 @@
+../../licenses/BSD-MIT
\ No newline at end of file
diff --git a/ccan/cpuid/_info b/ccan/cpuid/_info
new file mode 100644 (file)
index 0000000..1603b4b
--- /dev/null
@@ -0,0 +1,43 @@
+#include "cpuid.h"
+
+/**
+ * cpuid - a CPUID instruction parser for x86/x86_64 CPUs.
+ *
+ * This module tries to keep-it-simple to get information about the CPU
+ * from the CPU.
+ *
+ * Example:
+ * #include <ccan/cpuid/cpuid.h>
+ *
+ * int main()
+ * {
+ *     int highest;
+ *     cpuid(CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED, &highest);
+ *     printf ("Highest extended function supported: %d\n", highest);
+ *
+ *      return 0;
+ * }
+ *
+ * Author: Ahmed Samy <f.fallen45@gmail.com>
+ * License: MIT
+ * Version: 0.1
+ */
+
+int main(int argc, char *argv[])
+{
+       if (argc != 2)
+               return 1;
+
+       if (strcmp(argv[1], "depends") == 0) {
+#if defined(__i386__) || defined(__i386) || defined(__x86_64) \
+               || defined(_M_AMD64) || defined(__M_X64)
+               /* Nothing.  */
+#else
+               printf("ccan/build_assert\n");
+#endif
+               return 0;
+       }
+
+       return 1;
+}
+
diff --git a/ccan/cpuid/cpuid.c b/ccan/cpuid/cpuid.c
new file mode 100644 (file)
index 0000000..6133e13
--- /dev/null
@@ -0,0 +1,284 @@
+/*
+ * Copyright (c) 2013 Ahmed Samy  <f.fallen45@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file has been written with some help from wikipedia:
+ *     http://en.wikipedia.org/wiki/CPUID
+ */
+
+/* Only compile this file if we're on a x86 machine.  */
+#if defined(__i386__) || defined(__i386) || defined(__x86_64) \
+       || defined(_M_AMD64) || defined(__M_X64)
+#include "cpuid.h"
+
+#include <string.h>
+
+enum {
+       CPU_PROC_BRAND_STRING_INTERNAL0                 = 0x80000003,
+       CPU_PROC_BRAND_STRING_INTERNAL1                 = 0x80000004
+};
+
+#ifndef _MSC_VER
+static void ___cpuid(cpuid_t info, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
+{
+       __asm__(
+               "xchg %%ebx, %%edi\n\t"         /* 32bit PIC: Don't clobber ebx.  */
+               "cpuid\n\t"
+               "xchg %%ebx, %%edi\n\t"
+               : "=a"(*eax), "=D"(*ebx), "=c"(*ecx), "=d"(*edx)
+               : "0" (info)
+       );
+}
+#else
+#include <intrin.h>
+
+static void ___cpuid(cpuid_t info, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
+{
+       uint32_t registers[4];
+       __cpuid(registers, info);
+
+       *eax = registers[0];
+       *ebx = registers[1];
+       *ecx = registers[2];
+       *edx = registers[3];
+}
+#endif
+
+static struct {
+       uint32_t feature;
+       uint32_t mask;
+       bool use_edx;           /* ecx will be used if false.  */
+} features[] = {
+       { CF_MMX,               1 << 23,        true },
+       { CF_SSE,               1 << 25,        true },
+       { CF_SSE2,              1 << 26,        true },
+       { CF_SSE3,              1 << 9,         false },
+       { CF_FPU,               1 << 0,         true },
+
+       { CF_TSC,               1 << 4,         true },
+       { CF_MSR,               1 << 5,         true },
+
+       { CF_SSSE3,             1 << 9,         false },
+       { CF_AVX,               1 << 28,        false },
+
+       /* Extended ones.  */
+       { CEF_x64,              1 << 30,        true },
+       { CEF_FPU,              1 << 0,         true },
+       { CEF_DE,               1 << 2,         true },
+       { CEF_SYSCALLRET,       1 << 11,        true },
+       { CEF_CMOV,             1 << 15,        true },
+
+       { CEF_SSE4a,            1 << 6,         false },
+       { CEF_FMA4,             1 << 16,        false },
+       { CEF_XOP,              1 << 11,        false }
+};
+
+static bool has_feature(int feature, uint32_t ecx, uint32_t edx)
+{
+       int i;
+
+       for (i = 0; i < sizeof(features) / sizeof(features[0]); ++i) {
+               if (features[i].feature == feature) {
+                       if (features[i].use_edx)
+                               return (edx & features[i].mask);
+                       else
+                               return (ecx & features[i].mask);
+               }
+       }
+
+       return false;
+}
+
+bool cpuid_is_supported(void)
+{
+       int ret = 0;
+
+       asm volatile(
+               "pushfl\n\t"
+               "popl %%eax\n\t"
+               "movl %%eax, %%ecx\n\t"
+               "xorl $0x200000, %%eax\n\t"
+               "pushl %%eax\n\t"
+               "popfl\n\t"
+
+               "pushfl\n\t"
+               "popl %%eax\n\t"
+               "xorl %%ecx, %%eax\n\t"
+               "shrl $21, %%eax\n\t"
+               "andl $1, %%eax\n\t"
+               "pushl %%ecx\n\t"
+               "popfl\n\t"
+
+               : "=a" (ret)
+       );
+
+       return !!ret;
+}
+
+bool cpuid_test_feature(cpuid_t feature)
+{
+       if (feature > CPU_VIRT_PHYS_ADDR_SIZES || feature < CPU_EXTENDED_PROC_INFO_FEATURE_BITS)
+               return false;
+
+       return (feature <= cpuid_highest_ext_func_supported());
+}
+
+bool cpuid_has_feature(int feature, bool extended)
+{
+       uint32_t eax, ebx, ecx, edx;
+
+       if (!extended)
+               ___cpuid(CPU_PROCINFO_AND_FEATUREBITS, &eax, &ebx, &ecx, &edx);
+       else
+               ___cpuid(CPU_EXTENDED_PROC_INFO_FEATURE_BITS, &eax, &ebx, &ecx, &edx);
+
+       return has_feature(feature, ecx, edx);
+}
+
+static const char *const cpuids[] = {
+       "Nooooooooone",
+       "AMDisbetter!",
+       "AuthenticAMD",
+       "CentaurHauls",
+       "CyrixInstead",
+       "GenuineIntel",
+       "TransmetaCPU",
+       "GeniuneTMx86",
+       "Geode by NSC",
+       "NexGenDriven",
+       "RiseRiseRise",
+       "SiS SiS SiS ",
+       "UMC UMC UMC ",
+       "VIA VIA VIA ",
+       "Vortex86 SoC",
+       "KVMKVMKVMKVM"
+};
+
+cputype_t cpuid_get_cpu_type(void)
+{
+       static cputype_t cputype;
+       if (cputype == CT_NONE) {
+               union {
+                       char buf[12];
+                       uint32_t bufu32[3];
+               } u;
+               uint32_t i;
+
+               ___cpuid(CPU_VENDORID, &i, &u.bufu32[0], &u.bufu32[2], &u.bufu32[1]);
+               u.buf[12] = '\0';
+
+               for (i = 0; i < sizeof(cpuids) / sizeof(cpuids[0]); ++i) {
+                       if (strncmp(cpuids[i], u.buf, 12) == 0) {
+                               cputype = (cputype_t)i;
+                               break;
+                       }
+               }
+       }
+
+       return cputype;
+}
+
+const char *cpuid_get_cpu_type_string(const cputype_t cputype)
+{
+       return cpuids[(int)cputype];
+}
+
+uint32_t cpuid_highest_ext_func_supported(void)
+{
+       static uint32_t highest;
+
+       if (!highest) {
+               asm volatile(
+                       "cpuid\n\t"
+                       : "=a" (highest)
+                       : "a" (CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED)
+               );
+       }
+
+       return highest;
+}
+
+void cpuid(cpuid_t info, uint32_t *buf)
+{
+       /* Sanity checks, make sure we're not trying to do something
+        * invalid or we are trying to get information that isn't supported
+        * by the CPU.  */
+       if (info > CPU_VIRT_PHYS_ADDR_SIZES || (info > CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED
+               && !cpuid_test_feature(info)))
+               return;
+
+       if (info == CPU_PROC_BRAND_STRING) {
+               ___cpuid(CPU_PROC_BRAND_STRING,           &buf[0], &buf[1], &buf[2],  &buf[3]);
+               ___cpuid(CPU_PROC_BRAND_STRING_INTERNAL0, &buf[4], &buf[5], &buf[6],  &buf[7]);
+               ___cpuid(CPU_PROC_BRAND_STRING_INTERNAL1, &buf[8], &buf[9], &buf[10], &buf[11]);
+               return;
+       } else if (info == CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED) {
+               *buf = cpuid_highest_ext_func_supported();
+               return;
+       }
+
+       uint32_t eax, ebx, ecx, edx;
+       ___cpuid(info, &eax, &ebx, &ecx, &edx);
+
+       switch (info) {
+               case CPU_VENDORID:
+                       buf[0] = ebx;
+                       buf[1] = edx;
+                       buf[2] = ecx;
+                       break;
+               case CPU_PROCINFO_AND_FEATUREBITS:
+                       buf[0] = eax;   /* The so called "signature" of the CPU.  */
+                       buf[1] = edx;   /* Feature flags #1.  */
+                       buf[2] = ecx;   /* Feature flags #2.  */
+                       buf[3] = ebx;   /* Additional feature information.  */
+                       break;
+               case CPU_CACHE_AND_TLBD_INFO:
+                       buf[0] = eax;
+                       buf[1] = ebx;
+                       buf[2] = ecx;
+                       buf[3] = edx;
+                       break;
+               case CPU_EXTENDED_PROC_INFO_FEATURE_BITS:
+                       buf[0] = edx;
+                       buf[1] = ecx;
+                       break;
+               case CPU_L1_CACHE_AND_TLB_IDS:
+                       buf[0] = eax;
+                       buf[1] = ebx;
+                       buf[2] = ecx;
+                       buf[3] = edx;
+                       break;
+               case CPU_EXTENDED_L2_CACHE_FEATURES:
+                       *buf = ecx;
+                       break;
+               case CPU_ADV_POWER_MGT_INFO:
+                       *buf = edx;
+                       break;
+               case CPU_VIRT_PHYS_ADDR_SIZES:
+                       *buf = eax;
+                       break;
+               default:
+                       *buf = 0xbaadf00d;
+                       break;
+       }
+}
+
+#endif
+
diff --git a/ccan/cpuid/cpuid.h b/ccan/cpuid/cpuid.h
new file mode 100644 (file)
index 0000000..305d69a
--- /dev/null
@@ -0,0 +1,272 @@
+/*
+ * Copyright (c) 2013 Ahmed Samy  <f.fallen45@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef CCAN_CPUID_H
+#define CCAN_CPUID_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+/**
+ * enum cpuid - stuff to get information on from the CPU.
+ *
+ * This is used as a parameter in cpuid().
+ *
+ * CPU_VENDORID:
+ *     The CPU's Vendor ID.
+ *
+ * CPU_PROCINFO_AND_FEATUREBITS:
+ *     Processor information and feature bits (SSE, etc.).
+ *
+ * CPU_CACHE_AND_TLBD_INFO
+ *     Cache and TLBD Information.
+ *
+ * CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED:
+ *     Highest extended function supported address.
+ *     Can be like 0x80000008.
+ *
+ * CPU_EXTENDED_PROC_INFO_FEATURE_BITS:
+ *     Extended processor information and feature bits (64bit etc.)
+ *
+ * CPU_PROC_BRAND_STRING:
+ *     The Processor's brand string.
+ *
+ * CPU_L1_CACHE_AND_TLB_IDS:
+ *     L1 Cache and TLB Identifications.
+ *
+ * CPU_EXTENDED_L2_CACHE_FEATURES:
+ *     Extended L2 Cache features.
+ *
+ * CPU_ADV_POWER_MGT_INFO:
+ *     Advaned power management information.
+ *
+ * CPU_VIRT_PHYS_ADDR_SIZES:
+ *     Virtual and physical address sizes.
+ */
+
+typedef enum cpuid {
+       CPU_VENDORID                                    = 0,
+       CPU_PROCINFO_AND_FEATUREBITS                    = 1,
+       CPU_CACHE_AND_TLBD_INFO                         = 2,
+
+       CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED         = 0x80000000,
+       CPU_EXTENDED_PROC_INFO_FEATURE_BITS             = 0x80000001,
+       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;
+
+#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
+
+#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
+
+typedef enum cputype {
+       CT_NONE,
+       CT_AMDK5,
+       CT_AMD,
+       CT_CENTAUR,
+       CT_CYRIX,
+       CT_INTEL,
+       CT_TRANSMETA,
+       CT_NATIONAL_SEMICONDUCTOR,
+       CT_NEXGEN,
+       CT_RISE,
+       CT_SIS,
+       CT_UMC,
+       CT_VIA,
+       CT_VORTEX,
+       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
+ *
+ * Returns the CPU Type as cputype_t.
+ *
+ * See also: cpuid_get_cpu_type_string()
+ */
+cputype_t cpuid_get_cpu_type(void);
+
+/**
+ * cpuid_get_cpu_type_string - Get CPU Type string
+ *
+ * Returns the CPU type string based off cputype_t.
+ */
+const char *cpuid_get_cpu_type_string(const cputype_t cputype);
+
+/**
+ * cpuid_is_supported - test if the CPUID instruction is supported
+ *
+ * CPUID is not supported by old CPUS.
+ *
+ * Returns true if the cpuid instruction is supported, false otherwise.
+ *
+ * See also: cpuid()
+ */
+bool cpuid_is_supported(void);
+
+/**
+ * cpuid_highest_ext_func_supported - Get the highest extended function supported
+ *
+ *
+ * Returns the highest extended function supported.
+ *
+ * This is the same as calling:
+ *     cpuid(CPU_HIGHEST_EEXTENDED_FUNCTION_SUPPORTED, &highest);
+ *
+ * This is made visible to the linker because it's easier to call it
+ * instead of calling cpuid with less type-checking.  cpuid calls this.
+ *
+ * See also: cpuid()
+ */
+uint32_t cpuid_highest_ext_func_supported(void);
+
+/**
+ * cpuid - Get Some information from the CPU.
+ *
+ * This function expects buf to be a valid pointer to a string/int/...
+ * depending on the requested information.
+ *
+ * For CPU_VENDOR_ID:
+ *     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]:
+ *             Feature flags
+ *     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_EXTENDED_PROC_INFO_FEATURE_BITS:
+ *     Returns them in buf[0] and buf[1].
+ *
+ * For CPU_VIRT_PHYS_ADDR_SIZES:
+ *     Returns it as an integer in *buf.
+ *
+ * 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, uint32_t *buf);
+
+/**
+ * cpuid_test_feature - Test if @feature is available
+ *
+ * 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.
+ */
+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
+ * 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 true if the feature is available, false otherwise.
+ */
+#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
+
diff --git a/ccan/cpuid/test/run.c b/ccan/cpuid/test/run.c
new file mode 100644 (file)
index 0000000..c96f3ab
--- /dev/null
@@ -0,0 +1,56 @@
+#include "cpuid.h"
+
+#include <stdio.h>
+#include <stdint.h>
+
+int main()
+{
+       if (!cpuid_is_supported()) {
+               printf ("CPUID instruction is not supported by this CPU\n");
+               return 1;
+       }
+
+       printf ("Vendor ID: %s\n", cpuid_get_cpu_type_string (cpuid_get_cpu_type ()));
+
+       char buf[48];
+       cpuid(CPU_PROC_BRAND_STRING, (uint32_t *)buf);
+       printf ("Processor Brand: %s\n", buf);
+
+       printf ("Highest extended function supported: %#010x\n", cpuid_highest_ext_func_supported());
+
+       union {
+               struct {
+                       uint32_t phys_bits : 8;
+                       uint32_t virt_bits : 8;
+                       uint32_t reserved  : 16;
+               };
+               uint32_t w;
+       } s;
+       cpuid(CPU_VIRT_PHYS_ADDR_SIZES, &s.w);
+       printf ("Physical address size: %d\nVirtual: %d\n", s.phys_bits, s.virt_bits);
+
+       uint32_t extfeatures[2];
+       cpuid(CPU_EXTENDED_PROC_INFO_FEATURE_BITS, extfeatures);
+       printf ("Extended processor info and feature bits: %d %d\n", extfeatures[0], extfeatures[1]);
+
+       union {
+               struct {
+                       uint32_t line_size : 8;
+                       uint32_t reserved : 4;
+                       uint32_t assoc : 4;
+                       uint32_t cache_size : 16;
+               };
+
+               uint32_t w;
+       } l2c;
+
+       cpuid(CPU_EXTENDED_L2_CACHE_FEATURES, &l2c.w);
+       printf ("L2 Cache Size: %u KB\tLine Size: %u bytes\tAssociativity: %02xh\n",
+                       l2c.cache_size, l2c.line_size, l2c.assoc);
+
+       uint32_t invalid;
+       cpuid(0x0ffffffUL, &invalid);
+       printf ("Testing invalid: %#010x\n", invalid);
+       return 0;
+}
+