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| author | Jack Steiner <steiner@sgi.com> | 2010-01-12 15:09:04 -0600 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-01-15 11:08:55 -0800 |
| commit | 7a1110e861b2666ac09f5708d6fbe71d18ce64bb (patch) | |
| tree | 2958eb36de538330534c94ccfc5960133b3a4633 /arch/x86/kernel/apic/x2apic_uv_x.c | |
| parent | e68266b7001a4e29af083716f0c36c0d6dbb1b39 (diff) | |
| download | lwn-7a1110e861b2666ac09f5708d6fbe71d18ce64bb.tar.gz lwn-7a1110e861b2666ac09f5708d6fbe71d18ce64bb.zip | |
x86, uv: Add function retrieving node controller revision number
Add function for determining the revision id of the SGI UV
node controller chip (HUB). This function is needed in a
subsequent patch.
Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20100112210904.GA24546@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/apic/x2apic_uv_x.c')
| -rw-r--r-- | arch/x86/kernel/apic/x2apic_uv_x.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index b8bb869a6618..0e48de9ff864 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -36,6 +36,8 @@ DEFINE_PER_CPU(int, x2apic_extra_bits); static enum uv_system_type uv_system_type; static u64 gru_start_paddr, gru_end_paddr; +int uv_min_hub_revision_id; +EXPORT_SYMBOL_GPL(uv_min_hub_revision_id); static inline bool is_GRU_range(u64 start, u64 end) { @@ -55,6 +57,10 @@ static int early_get_nodeid(void) mmr = early_ioremap(UV_LOCAL_MMR_BASE | UVH_NODE_ID, sizeof(*mmr)); node_id.v = *mmr; early_iounmap(mmr, sizeof(*mmr)); + + /* Currently, all blades have same revision number */ + uv_min_hub_revision_id = node_id.s.revision; + return node_id.s.node_id; } |