diff options
| author | Robin Holt <holt@sgi.com> | 2009-12-16 01:47:52 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-16 16:20:13 +0100 |
| commit | 729d69e6995fc4dea8ff70df256a7d4034a3d21d (patch) | |
| tree | 6b8ccb8d00248458bb27417606fb9e402daaeb77 /arch/x86 | |
| parent | direct-io: cleanup blockdev_direct_IO locking (diff) | |
| download | linux-729d69e6995fc4dea8ff70df256a7d4034a3d21d.tar.xz linux-729d69e6995fc4dea8ff70df256a7d4034a3d21d.zip | |
x86: uv: introduce a means to translate from gpa -> socket_paddr
The UV BIOS has been updated to implement some of our interface
functionality differently than originally expected. These patches update
the kernel to the bios implementation and include a few minor bug fixes
which prevent us from doing significant testing on real hardware.
This patch:
For SGI UV systems, translate from a global physical address back to a
socket physical address. This does nothing to ensure the socket physical
address is actually addressable by the kernel. That is the responsibility
of the user of the function.
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')
| -rw-r--r-- | arch/x86/include/asm/uv/uv_hub.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h index d1414af98559..0cc955f16aec 100644 --- a/arch/x86/include/asm/uv/uv_hub.h +++ b/arch/x86/include/asm/uv/uv_hub.h @@ -232,6 +232,19 @@ static inline unsigned long uv_gpa(void *v) return uv_soc_phys_ram_to_gpa(__pa(v)); } +/* UV global physical address --> socket phys RAM */ +static inline unsigned long uv_gpa_to_soc_phys_ram(unsigned long gpa) +{ + unsigned long paddr = gpa & uv_hub_info->gpa_mask; + unsigned long remap_base = uv_hub_info->lowmem_remap_base; + unsigned long remap_top = uv_hub_info->lowmem_remap_top; + + if (paddr >= remap_base && paddr < remap_base + remap_top) + paddr -= remap_base; + return paddr; +} + + /* gnode -> pnode */ static inline unsigned long uv_gpa_to_gnode(unsigned long gpa) { |