freebsd-skq/sys/arm/xscale/std.xscale
cognet 43586d701a Instead of using sysarch() to store-retrieve the tp, add a magic address,
ARM_TP_ADDRESS, where the tp will be stored. On CPUs that support it, a cache
line will be allocated and locked for this address, so that it will never go
to RAM. On CPUs that does not, a page is allocated for it (it will be a bit
slower, and is wrong for SMP, but should be fine for UP).
The tp is still stored in the mdthread struct, and at each context switch,
ARM_TP_ADDRESS gets updated.

Suggested by:   davidxu
2005-02-26 18:59:01 +00:00

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# $FreeBSD$
options ARM_CACHE_LOCK_ENABLE