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Diffstat (limited to 'include/libcpu/cpuModel.h')
| -rw-r--r-- | include/libcpu/cpuModel.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/libcpu/cpuModel.h b/include/libcpu/cpuModel.h new file mode 100644 index 0000000000..d17839b7ea --- /dev/null +++ b/include/libcpu/cpuModel.h @@ -0,0 +1,51 @@ +/* + * This file contains declaration for variables and code + * that may be used to get the Intel Cpu identification + * that has been performed by checkCPUtypeSetCr0 function. + */ + +/* + * COPYRIGHT (c) 1998 valette@crf.canon.fr + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#ifndef libcpu_cpuModel_h +#define libcpu_cpuModel_h + +/* + * Tell us the machine setup.. + */ + +extern char hard_math; /* floating point coprocessor present indicator */ +extern char x86; /* type of cpu (3 = 386, 4 =486, ...) */ +extern char x86_model; +extern char x86_mask; +extern int x86_capability; /* cpuid:EDX */ +extern int x86_capability_x; /* cpuid:ECX */ +extern int x86_capability_ebx; /* cpuid:EBX */ +extern int x86_capability_cores; /* cpuid.(EAX=4, ECX=0) - physical cores */ +extern char x86_vendor_id[13]; +extern int have_cpuid; +extern unsigned char Cx86_step; /* cyrix processor identification */ + +/* Display this information on console in ascii form */ +extern void printCpuInfo(void); + +/* determine if the CPU has a TSC */ +#define x86_has_tsc() \ + (x86_capability & (1 << 4)) + +static inline unsigned long long +rdtsc(void) +{ + /* Return the value of the on-chip cycle counter. */ + unsigned long long result; + __asm__ volatile(".byte 0x0F, 0x31" : "=A" (result)); + return result; +} /* rdtsc */ + + +#endif |