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d8b47fca8c
Introduce a new file to hold ACPI based NUMA information parsing from SRAT and SLIT. SRAT includes the CPU ACPI ID to Proximity Domain mappings and memory ranges to Proximity Domain mapping. SLIT has the information of inter node distances(relative number for access latency). Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com> [rrichter@cavium.com Reworked for numa v10 series ] Signed-off-by: Robert Richter <rrichter@cavium.com> [david.daney@cavium.com reorderd and combinded with other patches in Hanjun Guo's original set, removed get_mpidr_in_madt() and use acpi_map_madt_entry() instead.] Signed-off-by: David Daney <david.daney@cavium.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Dennis Chen <dennis.chen@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
#ifndef __ASM_NUMA_H
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#define __ASM_NUMA_H
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#include <asm/topology.h>
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#ifdef CONFIG_NUMA
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#define NR_NODE_MEMBLKS (MAX_NUMNODES * 2)
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/* currently, arm64 implements flat NUMA topology */
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#define parent_node(node) (node)
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int __node_distance(int from, int to);
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#define node_distance(a, b) __node_distance(a, b)
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extern nodemask_t numa_nodes_parsed __initdata;
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/* Mappings between node number and cpus on that node. */
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extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
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void numa_clear_node(unsigned int cpu);
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#ifdef CONFIG_DEBUG_PER_CPU_MAPS
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const struct cpumask *cpumask_of_node(int node);
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#else
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/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
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static inline const struct cpumask *cpumask_of_node(int node)
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{
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return node_to_cpumask_map[node];
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}
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#endif
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void __init arm64_numa_init(void);
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int __init numa_add_memblk(int nodeid, u64 start, u64 end);
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void __init numa_set_distance(int from, int to, int distance);
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void __init numa_free_distance(void);
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void __init early_map_cpu_to_node(unsigned int cpu, int nid);
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void numa_store_cpu_info(unsigned int cpu);
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#else /* CONFIG_NUMA */
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static inline void numa_store_cpu_info(unsigned int cpu) { }
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static inline void arm64_numa_init(void) { }
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static inline void early_map_cpu_to_node(unsigned int cpu, int nid) { }
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#endif /* CONFIG_NUMA */
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#endif /* __ASM_NUMA_H */
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