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authorVojtech Pavlik <vojtech@suse.cz>2006-09-26 10:52:28 +0200
committerAndi Kleen <andi@basil.nowhere.org>2006-09-26 10:52:28 +0200
commit81af4449af9c9b686a4eeeb00112614621655704 (patch)
tree52dc5cac0124a87a6a323f415338c31631dbbf20 /include/asm-x86_64
parent248dcb2ffffe8f3e4a369556a68988788c208111 (diff)
[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>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/msr.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/asm-x86_64/msr.h b/include/asm-x86_64/msr.h
index 10f8b51cec8..37e194169fa 100644
--- a/include/asm-x86_64/msr.h
+++ b/include/asm-x86_64/msr.h
@@ -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) \