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author | Ingo Molnar <mingo@elte.hu> | 2008-08-11 13:40:56 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-08-11 13:40:56 +0200 |
commit | 251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3 (patch) | |
tree | 3c20c3e080f276848f2ad67aadab44a5d64bfda9 /arch/ia64/include/asm/numa.h | |
parent | Merge branch 'linus' into sched/urgent (diff) | |
parent | Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/c... (diff) | |
download | linux-251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3.tar.xz linux-251a169c69d1ff07cee7a9bb9fc4faff6b1d2ac3.zip |
Merge branch 'linus' into sched/urgent
Diffstat (limited to 'arch/ia64/include/asm/numa.h')
-rw-r--r-- | arch/ia64/include/asm/numa.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/numa.h b/arch/ia64/include/asm/numa.h new file mode 100644 index 000000000000..3499ff57bf42 --- /dev/null +++ b/arch/ia64/include/asm/numa.h @@ -0,0 +1,82 @@ +/* + * 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 */ |