X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Fasm-x86%2Ftsc.h;h=7d3e27f7d484d8ce848951b4f0b48a4d285242c0;hb=6232665040f9a23fafd9d94d4ae8d5a2dc850f65;hp=a4d806610b7ff5c56dc51a628ca8f20ad73d1c89;hpb=92633b72d18ca4f25de1f28e436a882159491e7e;p=powerpc.git

diff --git a/include/asm-x86/tsc.h b/include/asm-x86/tsc.h
index a4d806610b..7d3e27f7d4 100644
--- a/include/asm-x86/tsc.h
+++ b/include/asm-x86/tsc.h
@@ -1,13 +1,14 @@
 /*
- * linux/include/asm-i386/tsc.h
- *
- * i386 TSC related functions
+ * x86 TSC related functions
  */
-#ifndef _ASM_i386_TSC_H
-#define _ASM_i386_TSC_H
+#ifndef _ASM_X86_TSC_H
+#define _ASM_X86_TSC_H
 
 #include <asm/processor.h>
 
+#define NS_SCALE	10 /* 2^10, carefully chosen */
+#define US_SCALE	32 /* 2^32, arbitralrily chosen */
+
 /*
  * Standard way to access the cycle counter.
  */
@@ -16,6 +17,8 @@ typedef unsigned long long cycles_t;
 extern unsigned int cpu_khz;
 extern unsigned int tsc_khz;
 
+extern void disable_TSC(void);
+
 static inline cycles_t get_cycles(void)
 {
 	unsigned long long ret = 0;
@@ -24,39 +27,22 @@ static inline cycles_t get_cycles(void)
 	if (!cpu_has_tsc)
 		return 0;
 #endif
-
-#if defined(CONFIG_X86_GENERIC) || defined(CONFIG_X86_TSC)
 	rdtscll(ret);
-#endif
+
 	return ret;
 }
 
-/* Like get_cycles, but make sure the CPU is synchronized. */
-static __always_inline cycles_t get_cycles_sync(void)
+static inline cycles_t vget_cycles(void)
 {
-	unsigned long long ret;
-	unsigned eax, edx;
-
-	/*
-  	 * Use RDTSCP if possible; it is guaranteed to be synchronous
- 	 * and doesn't cause a VMEXIT on Hypervisors
-	 */
-	alternative_io(ASM_NOP3, ".byte 0x0f,0x01,0xf9", X86_FEATURE_RDTSCP,
-		       ASM_OUTPUT2("=a" (eax), "=d" (edx)),
-		       "a" (0U), "d" (0U) : "ecx", "memory");
-	ret = (((unsigned long long)edx) << 32) | ((unsigned long long)eax);
-	if (ret)
-		return ret;
-
 	/*
-	 * Don't do an additional sync on CPUs where we know
-	 * RDTSC is already synchronous:
+	 * We only do VDSOs on TSC capable CPUs, so this shouldnt
+	 * access boot_cpu_data (which is not VDSO-safe):
 	 */
-	alternative_io("cpuid", ASM_NOP2, X86_FEATURE_SYNC_RDTSC,
-			  "=a" (eax), "0" (1) : "ebx","ecx","edx","memory");
-	rdtscll(ret);
-
-	return ret;
+#ifndef CONFIG_X86_TSC
+	if (!cpu_has_tsc)
+		return 0;
+#endif
+	return (cycles_t) __native_read_tsc();
 }
 
 extern void tsc_init(void);
@@ -72,4 +58,7 @@ int check_tsc_unstable(void);
 extern void check_tsc_sync_source(int cpu);
 extern void check_tsc_sync_target(void);
 
+extern void tsc_calibrate(void);
+extern int notsc_setup(char *);
+
 #endif