diff options
| author | Robin Holt <holt@sgi.com> | 2009-12-16 01:47:54 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-16 16:20:13 +0100 |
| commit | fae419f2abd15ab7d1cd1413e6683a276a4e14e2 (patch) | |
| tree | 9e560c4eebfd5d41cf3ab5903d234fac798dc236 /arch/x86/include/asm/uv | |
| parent | x86: uv: xpc needs to provide an abstraction for uv_gpa (diff) | |
| download | linux-fae419f2abd15ab7d1cd1413e6683a276a4e14e2.tar.xz linux-fae419f2abd15ab7d1cd1413e6683a276a4e14e2.zip | |
x86: uv: introduce uv_gpa_is_mmr
Provide a mechanism for determining if a global physical address is
pointing to a UV hub MMR.
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/include/asm/uv')
| -rw-r--r-- | arch/x86/include/asm/uv/uv_hub.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h index 0cc955f16aec..8f1332bbfd72 100644 --- a/arch/x86/include/asm/uv/uv_hub.h +++ b/arch/x86/include/asm/uv/uv_hub.h @@ -232,6 +232,13 @@ static inline unsigned long uv_gpa(void *v) return uv_soc_phys_ram_to_gpa(__pa(v)); } +/* Top two bits indicate the requested address is in MMR space. */ +static inline int +uv_gpa_in_mmr_space(unsigned long gpa) +{ + return (gpa >> 62) == 0x3UL; +} + /* UV global physical address --> socket phys RAM */ static inline unsigned long uv_gpa_to_soc_phys_ram(unsigned long gpa) { |