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3 commits

Author SHA1 Message Date
cinap_lenrek
19a883ce7a usbehci: introduce dmaflush() function to handle portable cache invalidation for device drivers 2019-07-17 10:24:50 +02:00
cinap_lenrek
995379e388 usbehci: initial support for usb on zynq, remove uncached.h
the following hooks have been added to the ehci Ctlr
structore to handle cache coherency (on arm):

	void*	(*tdalloc)(ulong,int,ulong);
	void*	(*dmaalloc)(ulong);
	void	(*dmafree)(void*);
	void	(*dmaflush)(int,void*,ulong);

tdalloc() is used to allocate descriptors and the periodic
frame schedule array. on arm, this needs to return uncached
memory. tdalloc()ed memory is never freed.

dmaalloc()/dmafree() is used for io buffers. this can return
cached memory when when hardware maintains cache coherency (pc)
or dmaflush() is provided to flush/invalidate the cache (zynq),
otherwise needs to return uncached memory.

dmaflush() is used to flush/invalidate the cache. the first
argument tells us if we need to flush (non zero) or
invalidate (zero).

uncached.h is gone now. this change makes the handling explicit.
2015-02-14 03:00:31 +01:00
aiju
7a3f0998a0 added zynq kernel 2014-12-24 10:21:51 +01:00