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cpuModel.h @ caf761f

4.104.115

Last change on this file since caf761f was caf761f, checked in by Till Straumann <strauman@…>, on 10/28/09 at 21:40:14

2009-10-28 Till Straumann <strauman@…>

cpuModel.S, cpuModel.h, displayCpu.c: Save/cache CPUID:ECX (extended capabilities) in a new variable (x86_capability_x). Added more known flag description strings (printCpuInfo()) and let 'printCpuInfo()' dump the extended feature flags, too.

File size: 1.3 KB

Line
1	/* cpuModel.h
2	*
3	* This file contains declaration for variables and code
4	* that may be used to get the Intel Cpu identification
5	* that has been performed by checkCPUtypeSetCr0 function.
6	*
7	* COPYRIGHT (c) 1998 valette@crf.canon.fr
8	*
9	* The license and distribution terms for this file may be
10	* found in the file LICENSE in this distribution or at
11	* http://www.rtems.com/license/LICENSE.
12	*
13	* $Id$
14	*/
15
16	#ifndef libcpu_cpuModel_h
17	#define libcpu_cpuModel_h
18
19	/*
20	* Tell us the machine setup..
21	*/
22
23	extern char hard_math; /* floating point coprocessor present indicator */
24	extern char x86; /* type of cpu (3 = 386, 4 =486, ...) */
25	extern char x86_model;
26	extern char x86_mask;
27	extern int x86_capability; /* cpuid:EDX */
28	extern int x86_capability_x; /* cpuid:ECX */
29	extern char x86_vendor_id[13];
30	extern int have_cpuid;
31	extern unsigned char Cx86_step; /* cyrix processor identification */
32
33	extern void printCpuInfo(); /* Display this information on console in ascii form */
34
35	/* determine if the CPU has a TSC */
36	#define x86_has_tsc() \
37	(x86_capability & (1 << 4))
38
39	static inline unsigned long long
40	rdtsc(void)
41	{
42	/* Return the value of the on-chip cycle counter. */
43	unsigned long long result;
44	asm volatile(".byte 0x0F, 0x31" : "=A" (result));
45	return result;
46	} /* rdtsc */
47
48
49	#endif

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