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| author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-28 21:53:03 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-28 21:53:03 (GMT) |
| commit | ca9ba4471c1203bb6e759b76e83167fec54fe590 (patch) | |
| tree | 8aeb359631742f77f635cb5ff785bea9132502f9 /include/asm-arm/domain.h | |
| parent | d4965b3e2ff94d0c7b7e6e7e9794b54950a2f4b9 (diff) | |
| parent | c4713074375c61f939310b04e92090afe29810dc (diff) | |
| download | linux-fsl-qoriq-ca9ba4471c1203bb6e759b76e83167fec54fe590.tar.xz | |
Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] 3388/1: ixp23xx: add core ixp23xx support
[ARM] 3417/1: add support for logicpd pxa270 card engine
[ARM] 3387/1: ixp23xx: add defconfig
[ARM] 3377/2: add support for intel xsc3 core
[ARM] Move ice-dcc code into misc.c
[ARM] Fix decompressor serial IO to give CRLF not LFCR
[ARM] proc-v6: mark page table walks outer-cacheable, shared. Enable NX.
[ARM] nommu: trivial patch for arch/arm/lib/Makefile
[ARM] 3416/1: Update LART site URL
[ARM] 3415/1: Akita: Add missing EXPORT_SYMBOL
[ARM] 3414/1: ep93xx: reset ethernet controller before uncompressing
Diffstat (limited to 'include/asm-arm/domain.h')
| -rw-r--r-- | include/asm-arm/domain.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/asm-arm/domain.h b/include/asm-arm/domain.h index da1d960..f8ea2de 100644 --- a/include/asm-arm/domain.h +++ b/include/asm-arm/domain.h @@ -16,11 +16,29 @@ * DOMAIN_IO - domain 2 includes all IO only * DOMAIN_USER - domain 1 includes all user memory only * DOMAIN_KERNEL - domain 0 includes all kernel memory only + * + * The domain numbering depends on whether we support 36 physical + * address for I/O or not. Addresses above the 32 bit boundary can + * only be mapped using supersections and supersections can only + * be set for domain 0. We could just default to DOMAIN_IO as zero, + * but there may be systems with supersection support and no 36-bit + * addressing. In such cases, we want to map system memory with + * supersections to reduce TLB misses and footprint. + * + * 36-bit addressing and supersections are only available on + * CPUs based on ARMv6+ or the Intel XSC3 core. */ +#ifndef CONFIG_IO_36 #define DOMAIN_KERNEL 0 #define DOMAIN_TABLE 0 #define DOMAIN_USER 1 #define DOMAIN_IO 2 +#else +#define DOMAIN_KERNEL 2 +#define DOMAIN_TABLE 2 +#define DOMAIN_USER 1 +#define DOMAIN_IO 0 +#endif /* * Domain types |