linux_2_4 branch question: In config-shared.in, and previously in config.in,
whether or not the CPU has prefetch instructions seems to be dependent only
on whether CONFIG_MIPS32 is y. However, this causes our kernel builds to die
when compiling memcpy.S because the compiler is objecting to the pref/prefx
instructions. The gcc 2.96 compiler options we are using are -mtune=r4600
and -mips2.
Is it simply the case that the processors on all the boards supported in the
MIPS builds all support prefetch? At the moment, I've just put a specific
check in for our particular processor to stop CONFIG_CPU_HAS_PREFETCH from
being set to y and that stops the problem. In earlier (2.4.17 pre-release)
kernels, whether or not to define PREF/PREFX as pref/prefx or the empty
string was determined on a stricter set of criteria based around actual CPU
types rather than a blanket check on being a 32-bit MIPS.
--
Stewart Brodie, Senior Software Engineer
Pace Micro Technology PLC
645 Newmarket Road
Cambridge, CB5 8PB, United Kingdom WWW: http://www.pacemicro.com/
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