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CVS commit: src/sys/arch/powerpc/ibm4xx
Module Name: src
Committed By: rin
Date: Fri Feb 21 14:49:58 UTC 2020
Tiny improvements to copyin() and copyout():
- Use lwz/stw instead of 4-byte lswi/stswi for 405 and later, which
support unaligned word load/store by hardware. In many cases, both
source and destination are aligned on word boundaries.
- Use dcbst instead of dcbf to flush cache. The former does not
invalidate the cache line. Copied data should be used soon after.
To generate a diff of this commit:
cvs rdiff -u -r1.76 -r1.77 src/sys/arch/powerpc/ibm4xx/trap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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