Re: Problem with decrementer interrupt

2009-02-24 Thread sjoy...@wanadoo.fr
etting stored in link register...and i m > not able to figure out why... > > Regards, > Sumedh > > On Mon, Feb 23, 2009 at 11:03 PM, sjoy...@wanadoo.fr > wrote: > > Hi Sumedh, > > > > You may check the context in which your CPU in running the C code from >

Re: Problem with decrementer interrupt

2009-02-23 Thread sjoy...@wanadoo.fr
Hi Sumedh, You may check the context in which your CPU in running the C code from interrupt context (ie stack pointer (r1), kernel locks disabling rescheduling etc..) and double check the IRQ originator (the decrementer) is acknowlegded somewhere your handler before enabling back interrupts, else

Re: Gianfar tx-babbling-errors

2009-02-19 Thread sjoy...@wanadoo.fr
Hi Scott, Your issue may come from data setup (or corruption) instead of code path: babbling error may occurs when a TSEC TX descriptor hasn't its "last frame" bit set or when the data length is greated than max frame length. -- sj 2009/2/19 Scott Coulter > > > Kumar, > > > > > can't think of

Re: When do i need to allocate DMA buffer

2009-01-12 Thread sjoy...@wanadoo.fr
Hi Wael, 1. The DMA engine source and destination registers are based on physical memory addresses, whatever is the bus connected on, thus you need to provide it physical addresses. It looks like you are a bit confused about the terminology "DMA buffer": a DMA buffer is either the source and/or de