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author | jhb <jhb@FreeBSD.org> | 2006-08-11 19:22:57 +0000 |
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committer | jhb <jhb@FreeBSD.org> | 2006-08-11 19:22:57 +0000 |
commit | ce9f8963fd6c7fcb782d8b9eebf51fb108d847f8 (patch) | |
tree | 1ef0dbab4a5d1ad1c224a7eec5af2c8597bfef7d /sys/ia64 | |
parent | 11b5f41beac4542db8456ad35e02e9a1d89d2291 (diff) | |
download | FreeBSD-src-ce9f8963fd6c7fcb782d8b9eebf51fb108d847f8.zip FreeBSD-src-ce9f8963fd6c7fcb782d8b9eebf51fb108d847f8.tar.gz |
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.
Reviewed by: alc
Diffstat (limited to 'sys/ia64')
-rw-r--r-- | sys/ia64/include/pmap.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/ia64/include/pmap.h b/sys/ia64/include/pmap.h index 978917d..b025aef 100644 --- a/sys/ia64/include/pmap.h +++ b/sys/ia64/include/pmap.h @@ -119,6 +119,8 @@ extern uint64_t pmap_vhpt_base[]; extern int pmap_vhpt_log2size; #define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list)) +#define pmap_mapbios(pa, sz) pmap_mapdev(pa, sz) +#define pmap_unmapbios(va, sz) pmap_unmapdev(va, sz) vm_offset_t pmap_steal_memory(vm_size_t); void pmap_bootstrap(void); |