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vppinfra - ARM: cycle count 64bits register is only available on ARMv8

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Change-Id: I7d622e591020a482af68667f4d1ed2056258d2c8
Signed-off-by: Christophe Fontaine <christophe.fontaine@qosmos.com>
This commit is contained in:
Christophe Fontaine
2016-05-13 07:07:28 +00:00
committed by Damjan Marion
parent 862623da6e
commit 9341a1f850
1 changed files with 9 additions and 2 deletions
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11
vppinfra/vppinfra/time.h
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@ -113,13 +113,20 @@ always_inline u64 clib_cpu_time_now (void)
}
#elif defined (__arm__)
#if defined(__ARM_ARCH_7A__)
always_inline u64 clib_cpu_time_now (void)
#if defined(__ARM_ARCH_8A__)
always_inline u64 clib_cpu_time_now (void) /* We may run arm64 in aarch32 mode, to leverage 64bit counter */
{
u64 tsc;
asm volatile("mrrc p15, 0, %Q0, %R0, c9" : "=r" (tsc));
return tsc;
}
#elif defined(__ARM_ARCH_7A__)
always_inline u64 clib_cpu_time_now (void)
{
u32 tsc;
asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (tsc));
return (u64)tsc;
}
#else
always_inline u64 clib_cpu_time_now (void)
{