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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>
This commit is contained in:
Robin Holt 2009-12-15 16:47:54 -08:00 committed by Linus Torvalds
parent 682128939f
commit fae419f2ab
1 changed files with 7 additions and 0 deletions
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7
arch/x86/include/asm/uv/uv_hub.h
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@ -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)
{