diff options
| author | Robin Holt <holt@sgi.com> | 2009-12-15 16:47:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-16 07:20:13 -0800 |
| commit | fae419f2abd15ab7d1cd1413e6683a276a4e14e2 (patch) | |
| tree | 9e560c4eebfd5d41cf3ab5903d234fac798dc236 | |
| parent | 682128939f546e3a9cdd9fef392b932dd9c41a65 (diff) | |
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>
| -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 0cc955f16ae..8f1332bbfd7 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) { |