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authorHaavard Skinnemoen <hskinnemoen@atmel.com>2007-12-13 12:56:33 +0100
committerStefan Roese <sr@denx.de>2007-12-13 13:15:16 +0100
commit4d7d6936eb29af7cca330937808312aa5f61454d (patch)
treeb376f7dce492d171cf6740ac4ec36574e94eec1e /include/i2c.h
parentcdbaefb5f5f03e54455d0439dcf6dbd97ead1f9d (diff)
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Introduce map_physmem() and unmap_physmem()
map_physmem() returns a virtual address which can be used to access a given physical address without involving the cache. unmap_physmem() should be called when the virtual address returned by map_physmem() is no longer needed. This patch adds a stub implementation which simply returns the physical address cast to a uchar * for all architectures except AVR32, which converts the physical address to an uncached virtual mapping. unmap_physmem() is a no-op on all architectures, but if any architecture needs to do such mappings through the TLB, this is the hook where those TLB entries can be invalidated. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
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