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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>
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2 changed files with 18 additions and 0 deletions
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@ -495,5 +495,17 @@ static inline void uv_hub_send_ipi(int pnode, int apicid, int vector)
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uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
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}
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/*
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* Get the minimum revision number of the hub chips within the partition.
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* 1 - initial rev 1.0 silicon
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* 2 - rev 2.0 production silicon
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*/
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static inline int uv_get_min_hub_revision_id(void)
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{
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extern int uv_min_hub_revision_id;
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return uv_min_hub_revision_id;
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}
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#endif /* CONFIG_X86_64 */
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#endif /* _ASM_X86_UV_UV_HUB_H */
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@ -36,6 +36,8 @@ DEFINE_PER_CPU(int, x2apic_extra_bits);
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static enum uv_system_type uv_system_type;
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static u64 gru_start_paddr, gru_end_paddr;
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int uv_min_hub_revision_id;
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EXPORT_SYMBOL_GPL(uv_min_hub_revision_id);
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static inline bool is_GRU_range(u64 start, u64 end)
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{
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@ -55,6 +57,10 @@ static int early_get_nodeid(void)
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mmr = early_ioremap(UV_LOCAL_MMR_BASE | UVH_NODE_ID, sizeof(*mmr));
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node_id.v = *mmr;
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early_iounmap(mmr, sizeof(*mmr));
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/* Currently, all blades have same revision number */
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uv_min_hub_revision_id = node_id.s.revision;
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return node_id.s.node_id;
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}
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