Module: xenomai-forge
Branch: master
Commit: f40f046eaf8d76cb2b45ab67f145d4998a1d9391
URL:
http://git.xenomai.org/?p=xenomai-forge.git;a=commit;h=f40f046eaf8d76cb2b45ab67f145d4998a1d9391
Author: Charles Retailleau <charles.retaill...@axesseurope.com>
Date: Fri Aug 17 20:23:15 2012 +0200
cobalt/powerpc: fix __xn_rdtsc for newer ppc cores
Where the mftb and mftbu instructions are not supported.
Replace them with mfspr.
---
include/asm-powerpc/syscall.h | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/asm-powerpc/syscall.h b/include/asm-powerpc/syscall.h
index 44f257b..2095402 100644
--- a/include/asm-powerpc/syscall.h
+++ b/include/asm-powerpc/syscall.h
@@ -169,9 +169,9 @@ static inline unsigned long long __xn_rdtsc(void)
} u;
unsigned long __tbu;
- __asm__ __volatile__("1: mftbu %0\n"
- "mftb %1\n"
- "mftbu %2\n"
+ __asm__ __volatile__("1: mfspr %0,269\n"
+ "mfspr %1,268\n"
+ "mfspr %2,269\n"
"cmpw %2,%0\n"
"bne- 1b\n":"=r"(u.v[0]),
"=r"(u.v[1]), "=r"(__tbu));
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