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[PATCH] Add macros for rdtscp 

This patch adds macros for reading tsc via the RDTSCP instruction, as well
as writing the auxilliary MSR read by RDTSCP to msr.h

[AK: changed rdtscp definition for old binutils]

Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Vojtech Pavlik 2006-09-26 10:52:28 +02:00 committed by Andi Kleen
parent 248dcb2fff
commit 81af4449af
1 changed files with 11 additions and 0 deletions
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11
include/asm-x86_64/msr.h
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@ -66,14 +66,25 @@
#define rdtscl(low) \
__asm__ __volatile__ ("rdtsc" : "=a" (low) : : "edx")
#define rdtscp(low,high,aux) \
asm volatile (".byte 0x0f,0x01,0xf9" : "=a" (low), "=d" (high), "=c" (aux))
#define rdtscll(val) do { \
unsigned int __a,__d; \
asm volatile("rdtsc" : "=a" (__a), "=d" (__d)); \
(val) = ((unsigned long)__a) | (((unsigned long)__d)<<32); \
} while(0)
#define rdtscpll(val, aux) do { \
unsigned long __a, __d; \
asm volatile (".byte 0x0f,0x01,0xf9" : "=a" (__a), "=d" (__d), "=c" (aux)); \
(val) = (__d << 32) | __a; \
} while (0)
#define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
#define write_rdtscp_aux(val) wrmsr(0xc0000103, val, 0)
#define rdpmc(counter,low,high) \
__asm__ __volatile__("rdpmc" \
: "=a" (low), "=d" (high) \