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On platforms where DMA devices are not in the same coherency domain as the CPU cache, it is necessary to be able to explicitly clean the cache (i.e. force data to be written back to main memory) and invalidate the cache (i.e. discard any cached data and force a subsequent read from main memory). Add support for cache management via the standard Zicbom extension or the T-Head cache management operations extension, with the supported extension detected on first use. Support cache management operations only on I/O buffers, since these are guaranteed to not share cachelines with other data. Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE README File Quick start guide: cd src make For any more detailed instructions, see http://ipxe.org