Messages in this thread | | | From | Segher Boessenkool <> | Subject | Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver | Date | Thu, 17 May 2007 21:27:17 +0200 |
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> + * We must write a positive value to the decrementer to clear > + * the interrupt on the IBM 970 CPU series. In periodic mode, > + * this happens when the decrementer gets reloaded later, but > + * in one-shot mode, we have to do it here since an event handler > + * may skip loading the new value...
Nothing special about 970 here -- on *every* PowerPC, a decrementer exception exists as long as the high bit of the decrementer equals 1. BookE is different of course. Some other CPUs might deviate from the architecture as well.
Segher
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