diff options
| author | Olof Johansson <olof@lixom.net> | 2005-09-20 13:46:44 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2005-09-21 19:21:07 +1000 |
| commit | d0035c62d9145a2ce3057c8182a7ff0b4921a41c (patch) | |
| tree | 0a55703d5e71668f61439649f4963daba55401c3 /include/asm-ppc64 | |
| parent | c707ffcf3a44914f30e5f2fd53089ad5586c9e42 (diff) | |
[PATCH] ppc64: Updated Olof iommu updates 2/3
There are potential cases in the future where the IOMMU might be
mapping smaller pages than the regular MMU is using. Keep the
allocator working on MMU pagesizes, but the low-level mapping
functions need to map more than one TCE entry per page to deal with
this.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-ppc64')
| -rw-r--r-- | include/asm-ppc64/dart.h | 4 | ||||
| -rw-r--r-- | include/asm-ppc64/tce.h | 7 |
2 files changed, 11 insertions, 0 deletions
diff --git a/include/asm-ppc64/dart.h b/include/asm-ppc64/dart.h index 306799a31a5..a9000de8a2e 100644 --- a/include/asm-ppc64/dart.h +++ b/include/asm-ppc64/dart.h @@ -51,5 +51,9 @@ #define DARTMAP_RPNMASK 0x00ffffff +#define DART_SHIFT 12 +#define DART_PAGE_SIZE (1 << DART_SHIFT) +#define DART_PAGE_FACTOR (PAGE_SHIFT - DART_SHIFT) + #endif diff --git a/include/asm-ppc64/tce.h b/include/asm-ppc64/tce.h index 636504c62c8..d40b6b42ab3 100644 --- a/include/asm-ppc64/tce.h +++ b/include/asm-ppc64/tce.h @@ -28,6 +28,13 @@ #define TCE_VB 0 #define TCE_PCI 1 +/* TCE page size is 4096 bytes (1 << 12) */ + +#define TCE_SHIFT 12 +#define TCE_PAGE_SIZE (1 << TCE_SHIFT) +#define TCE_PAGE_FACTOR (PAGE_SHIFT - TCE_SHIFT) + + /* tce_entry * Used by pSeries (SMP) and iSeries/pSeries LPAR, but there it's * abstracted so layout is irrelevant. |