Messages in this thread Patch in this message | | | Date | Mon, 23 Nov 2009 19:39:40 -0600 | From | Robin Holt <> | Subject | [patch 3/8] x86: UV - Introduce uv_gpa_is_mmr. |
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Provide a mechanism for determining if a global physical address is pointing to a UV hub MMR.
To: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Robin Holt <holt@sgi.com> Cc: Jack Steiner <steiner@sgi.com> Cc: lkml <linux-kernel@vger.kernel.org> Cc: linux-mm@vger.kernel.org
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arch/x86/include/asm/uv/uv_hub.h | 7 +++++++ 1 file changed, 7 insertions(+)
Index: linux-x86/arch/x86/include/asm/uv/uv_hub.h =================================================================== --- linux-x86.orig/arch/x86/include/asm/uv/uv_hub.h 2009-11-09 08:50:25.000000000 -0600 +++ linux-x86/arch/x86/include/asm/uv/uv_hub.h 2009-11-09 08:52:14.000000000 -0600 @@ -232,6 +232,13 @@ static inline unsigned long uv_gpa(void 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) {
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