iPhone Open Application Development
iPhone Open Application Development Write Native Objective-C Applications for the iPhone

By Jonathan A. Zdziarski
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How Do You Flush The Arm Data Cache ?
bobatstyletap
post May 8 2008, 11:42 PM
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I need to be able to flush the data cache for the ARM processor on the iPhone/iPod Touch.

There is an ARM co-processor instruction to do this, but the program needs to be running in privileged mode for this to work and I assume that the program is running in user mode.

I would guess that there must be a Darwin level API call to do this, but I haven't had any luck finding it yet.

Any help you could provide would be much appreciated.
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jzdziarski
post May 9 2008, 03:29 AM
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No idea. You'd likely need to consult an ARM assembly reference.
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bobatstyletap
post Yesterday, 12:00 AM
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QUOTE (jzdziarski @ May 8 2008, 11:29 PM) *
No idea. You'd likely need to consult an ARM assembly reference.

I believe that the instructions necessary to flush the processor instruction cache have to be issued at the kernel level so I'm hoping that there is a Darwin API call for this (most OSes support this). Do you know of any forums where there is any Darwin level expertise ?

Thanks.
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