diff options
| author | Owain Ainsworth <oga@cvs.openbsd.org> | 2009-02-05 01:13:22 +0000 |
|---|---|---|
| committer | Owain Ainsworth <oga@cvs.openbsd.org> | 2009-02-05 01:13:22 +0000 |
| commit | 82fda29c886a059ab961cba463ebf312068065e5 (patch) | |
| tree | 6a902aa43f70f9165ac27c861964668af599c3a1 /sys/arch/i386/include/pmap.h | |
| parent | 74f276ec4910fc7e6bcd3162c3804bd97011549a (diff) | |
add MD PMAP_NOCACHE flag to i386 and use it to implement the
BUS_DMA_NOCACHE flag with guarantees that the dma memory will be mapped
uncached. Some broken/odd hardware needs this.
discussion with miod, toby, art and kettenis. ok miod.
Diffstat (limited to 'sys/arch/i386/include/pmap.h')
| -rw-r--r-- | sys/arch/i386/include/pmap.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/arch/i386/include/pmap.h b/sys/arch/i386/include/pmap.h index fa446e6c2a0..89af1a42440 100644 --- a/sys/arch/i386/include/pmap.h +++ b/sys/arch/i386/include/pmap.h @@ -1,4 +1,4 @@ -/* $OpenBSD: pmap.h,v 1.50 2008/12/18 14:17:28 kurt Exp $ */ +/* $OpenBSD: pmap.h,v 1.51 2009/02/05 01:13:21 oga Exp $ */ /* $NetBSD: pmap.h,v 1.44 2000/04/24 17:18:18 thorpej Exp $ */ /* @@ -292,6 +292,10 @@ struct pv_entry { /* locked by its list's pvh_lock */ vaddr_t pv_va; /* the virtual address */ struct vm_page *pv_ptp; /* the vm_page of the PTP */ }; +/* + * MD flags to pmap_enter: + */ +#define PMAP_NOCACHE PMAP_MD0 /* * We keep mod/ref flags in struct vm_page->pg_flags. |