Date: Sat, 12 Aug 2006 11:40:11 +0200 From: Joel Dahl <joel@FreeBSD.org> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/amd64/acpica madt.c src/sys/amd64/amd64 pmap.c src/sys/amd64/include pmap.h src/sys/dev/acpica/Osd OsdMemory.c src/sys/i386/acpica acpi_machdep.c madt.c src/sys/i386/i386 pmap.c src/sys/i386/include pmap.h src/sys/ia64/include pmap.h Message-ID: <1155375611.667.6.camel@localhost> In-Reply-To: <200608111922.k7BJMvpS009010@repoman.freebsd.org> References: <200608111922.k7BJMvpS009010@repoman.freebsd.org>
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On Fri, 2006-08-11 at 19:22 +0000, John Baldwin wrote: > jhb 2006-08-11 19:22:57 UTC > > FreeBSD src repository > > Modified files: > sys/amd64/acpica madt.c > sys/amd64/amd64 pmap.c > sys/amd64/include pmap.h > sys/dev/acpica/Osd OsdMemory.c > sys/i386/acpica acpi_machdep.c madt.c > sys/i386/i386 pmap.c > sys/i386/include pmap.h > sys/ia64/include pmap.h > Log: > First pass at allowing memory to be mapped using cache modes other than > WB (write-back) on x86 via control bits in PTEs and PDEs (including making > use of the PAT MSR). Changes include: > - A new pmap_mapdev_attr() function for amd64 and i386 which takes an > additional parameter (relative to pmap_mapdev()) specifying the cache > mode for this mapping. Note that on amd64 only WB mappings are done with > the direct map, all other modes result in a private mapping. > - pmap_mapdev() on i386 and amd64 now defaults to using UC (uncached) > mappings rather than WB. Previously we relied on the BIOS setting up > MTRR's to enforce memio regions being treated as UC. This might make > hw.cbb_start_memory unnecessary in some cases now for example. > - A new pmap_mapbios()/pmap_unmapbios() API has been added to allow places > that used pmap_mapdev() to map non-device memory (such as ACPI tables) > to do so using WB as before. > - A new pmap_change_attr() function for amd64 and i386 that changes the > caching mode for a range of KVA. Nice! Thanks! -- Joel
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