On 03/25/2010 09:00 AM, Csdncannon wrote:
> I am really sorry that the previously attached code is wrong, this one
> "timebase.c" is the right one, and the "log_timebase" file is the right log.
>
> We are using FreeScale PowerPc 8378, kernel 2.6.28 and compiled as 32-bit.
volatile unsigned long long getTimeBase()
{
unsigned long upper,lower,upper2;
do {
asm volatile("sync; isync":::"memory");
asm volatile("mftbu %0" : "=r" (upper));
asm volatile("sync; isync":::"memory");
asm volatile("mftbl %0" : "=r" (lower));
asm volatile("sync; isync":::"memory");
asm volatile("mftbu %0" : "=r" (upper2));
asm volatile("sync; isync":::"memory");
}while(upper2!=upper);
return (upper<<32)|lower;
}
Shouldn't "upper" be cast to 64-bit before shifting?
Chris
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