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由 David S. Miller 提交于
The way to do this varies by platform type and the exact memory controller the cpu uses. For Spitfire cpus we currently just use prom_getunumber() and hope that works. For Cheetah cpus we have a memory controller driver that can compute this information. Signed-off-by: NDavid S. Miller <davem@davemloft.net>881d021a