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331722 |
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29-Mar-2018 |
eadler |
Revert r330897:
This was intended to be a non-functional change. It wasn't. The commit message was thus wrong. In addition it broke arm, and merged crypto related code.
Revert with prejudice.
This revert skips files touched in r316370 since that commit was since MFCed. This revert also skips files that require $FreeBSD$ property changes.
Thank you to those who helped me get out of this mess including but not limited to gonzo, kevans, rgrimes.
Requested by: gjb (re)
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209482 |
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23-Jun-2010 |
jchandra |
Merge jmallett@'s n64 work into HEAD - changeset 6
PTE flag cleanup from http://svn.freebsd.org/base/user/jmallett/octeon - Rename PTE_xx flags to match their MIPS names - Use the new pte_set/test/clear macros uniformly, instead of a mixture of mips_pg_xxx(), pmap_pte_x() macros and direct access. - Remove unused macros and defines from pte.h and pmap.c
Discussed on freebsd-mips@
Approved by: rrs(mentor), jmallett
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195649 |
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12-Jul-2009 |
alc |
Add support to the virtual memory system for configuring machine- dependent memory attributes:
Rename vm_cache_mode_t to vm_memattr_t. The new name reflects the fact that there are machine-dependent memory attributes that have nothing to do with controlling the cache's behavior.
Introduce vm_object_set_memattr() for setting the default memory attributes that will be given to an object's pages.
Introduce and use pmap_page_{get,set}_memattr() for getting and setting a page's machine-dependent memory attributes. Add full support for these functions on amd64 and i386 and stubs for them on the other architectures. The function pmap_page_set_memattr() is also responsible for any other machine-dependent aspects of changing a page's memory attributes, such as flushing the cache or updating the direct map. The uses include kmem_alloc_contig(), vm_page_alloc(), and the device pager:
kmem_alloc_contig() can now be used to allocate kernel memory with non-default memory attributes on amd64 and i386.
vm_page_alloc() and the device pager will set the memory attributes for the real or fictitious page according to the object's default memory attributes.
Update the various pmap functions on amd64 and i386 that map pages to incorporate each page's memory attributes in the mapping.
Notes: (1) Inherent to this design are safety features that prevent the specification of inconsistent memory attributes by different mappings on amd64 and i386. In addition, the device pager provides a warning when a device driver creates a fictitious page with memory attributes that are inconsistent with the real page that the fictitious page is an alias for. (2) Storing the machine-dependent memory attributes for amd64 and i386 as a dedicated "int" in "struct md_page" represents a compromise between space efficiency and the ease of MFCing these changes to RELENG_7.
In collaboration with: jhb
Approved by: re (kib)
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195033 |
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26-Jun-2009 |
alc |
This change is the next step in implementing the cache control functionality required by video card drivers. Specifically, this change introduces vm_cache_mode_t with an appropriate VM_CACHE_DEFAULT definition on all architectures. In addition, this changes adds a vm_cache_mode_t parameter to kmem_alloc_contig() and vm_phys_alloc_contig(). These will be the interfaces for allocating mapped kernel memory and physical memory, respectively, with non-default cache modes.
In collaboration with: jhb
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