On Mon, Oct 13, 2008 at 04:09:36PM +0100, Daniel THOMPSON wrote: > Tom Cooksey wrote: > > Yup, I think that's what I'm going to end up having to do. Even if I can get > > the physical address, I need some way to flush the CPU cache to RAM before I > > ask the GPU to blit. I doubt there's any way to do that from userspace. :-( I'm > > not even sure of the kernel API to do it. Any ideas? > > MIPS has it: http://www.linux-mips.org/wiki/Cacheflush_Syscall > and so does SH. I'm afraid I don't know about ARM though. ARM also implements sys_cacheflush(start, end /* exclusive */, 0) but does not provide separate methods for I or D cache as in the MIPS docs above, ARM sys_cacheflush'es both I+D caches. -- Regards, George > > -- > Daniel Thompson (STMicroelectronics) <daniel.thompson@xxxxxx> > 1000 Aztec West, Almondsbury, Bristol, BS32 4SQ. 01454 462659 > > If a car is a horseless carriage then is a motorcycle a horseless horse? > -- > To unsubscribe from this list: send the line "unsubscribe linux-embedded" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
