Date: Tue, 13 Jan 2015 22:55:43 -0700 (MST) From: sson <sson@FreeBSD.org> To: freebsd-mips@freebsd.org Subject: Re: [RFC] Cache control from user land (patch) Message-ID: <1421214943629-5980520.post@n5.nabble.com> In-Reply-To: <54B57760.3090508@ignoranthack.me> References: <1421175994697-5980362.post@n5.nabble.com> <54B57760.3090508@ignoranthack.me>
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Sean Bruno-6 wrote > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA512 > > On 01/13/15 11:06, sson wrote: >> Hi all: >> >> Below is a link to a patch that provides a sysarch() so that cache >> lines may be invalidated from userspace (via the sysarch() system >> call). For convenience mips_cacheflush() is provided in the >> machine/cachectl.h header file: >> >> int mips_cacheflush(void *addr, size_t nbytes, int whichcache); >> >> mips_cacheflush() flushes the content of the selected cache for the >> user addresses in the range from addr to (addr+nbytes-1). >> whichcache may be: >> >> MIPS_CF_ICACHE: Flush the instruction cache lines for a given >> user address range. MIPS_CF_DCACHE: Write back to memory and >> invalidate the cache lines for a given user address range. >> MIPS_CF_BCACHE: Write back and invalidate both types of caches for >> a given user address range. MIPS_CF_ICACHE_ALL, MIPS_CF_DCACHE, or >> MIPS_CF_BCACHE: Full the entire given cache(s). >> >> mips_cacheflush() may return the errno EFAULT or EINVAL (whichcache >> is not valid). In short, it is similar to the cacheflush() that >> netbsd provides for mips. >> >> The diff: >> https://people.freebsd.org/~sson/mips/cacheflush/mips_cacheflush.diff >> >> Comments, concerns, questions, suggestions, etc. are welcome. >> >> Regards, >> >> -stacey. >> >> >> >> > I've tried applying this to head. > > I get a reject from the last bits to sys/mips/mips/sys_machdep.c I should have mentioned the diff is against cheribsd which will get upstreamed to freebsd at some point. FreeBSD head is missing the UserLevel Register support change, for example: https://people.freebsd.org/~sson/mips/ulri/ulri_kernel.diff -stacey. -- View this message in context: http://freebsd.1045724.n5.nabble.com/RFC-Cache-control-from-user-land-patch-tp5980362p5980520.html Sent from the freebsd-mips mailing list archive at Nabble.com.
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