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authorIngo Molnar <mingo@elte.hu>2008-08-11 13:40:56 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-11 13:40:56 +0200
commit251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3 (patch)
tree3c20c3e080f276848f2ad67aadab44a5d64bfda9 /arch/ia64/include/asm/numa.h
parentMerge branch 'linus' into sched/urgent (diff)
parentMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/c... (diff)
downloadlinux-251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3.tar.xz
linux-251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3.zip
Merge branch 'linus' into sched/urgent
Diffstat (limited to 'arch/ia64/include/asm/numa.h')
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1 files changed, 82 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/numa.h b/arch/ia64/include/asm/numa.h
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+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * This file contains NUMA specific prototypes and definitions.
+ *
+ * 2002/08/05 Erich Focht <efocht@ess.nec.de>
+ *
+ */
+#ifndef _ASM_IA64_NUMA_H
+#define _ASM_IA64_NUMA_H
+
+
+#ifdef CONFIG_NUMA
+
+#include <linux/cache.h>
+#include <linux/cpumask.h>
+#include <linux/numa.h>
+#include <linux/smp.h>
+#include <linux/threads.h>
+
+#include <asm/mmzone.h>
+
+#define NUMA_NO_NODE -1
+
+extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
+extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
+extern pg_data_t *pgdat_list[MAX_NUMNODES];
+
+/* Stuff below this line could be architecture independent */
+
+extern int num_node_memblks; /* total number of memory chunks */
+
+/*
+ * List of node memory chunks. Filled when parsing SRAT table to
+ * obtain information about memory nodes.
+*/
+
+struct node_memblk_s {
+ unsigned long start_paddr;
+ unsigned long size;
+ int nid; /* which logical node contains this chunk? */
+ int bank; /* which mem bank on this node */
+};
+
+struct node_cpuid_s {
+ u16 phys_id; /* id << 8 | eid */
+ int nid; /* logical node containing this CPU */
+};
+
+extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
+extern struct node_cpuid_s node_cpuid[NR_CPUS];
+
+/*
+ * ACPI 2.0 SLIT (System Locality Information Table)
+ * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
+ *
+ * This is a matrix with "distances" between nodes, they should be
+ * proportional to the memory access latency ratios.
+ */
+
+extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
+#define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)])
+
+extern int paddr_to_nid(unsigned long paddr);
+
+#define local_nodeid (cpu_to_node_map[smp_processor_id()])
+
+extern void map_cpu_to_node(int cpu, int nid);
+extern void unmap_cpu_from_node(int cpu, int nid);
+
+
+#else /* !CONFIG_NUMA */
+#define map_cpu_to_node(cpu, nid) do{}while(0)
+#define unmap_cpu_from_node(cpu, nid) do{}while(0)
+
+#define paddr_to_nid(addr) 0
+
+#endif /* CONFIG_NUMA */
+
+#endif /* _ASM_IA64_NUMA_H */