linux/arch/ia64/include/asm/numa.h
Lee Schermerhorn 4e25b2576e hugetlb: add generic definition of NUMA_NO_NODE
Move definition of NUMA_NO_NODE from ia64 and x86_64 arch specific headers
to generic header 'linux/numa.h' for use in generic code.  NUMA_NO_NODE
replaces bare '-1' where it's used in this series to indicate "no node id
specified".  Ultimately, it can be used to replace the -1 elsewhere where
it is used similarly.

Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Andi Kleen <andi@firstfloor.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: Adam Litke <agl@us.ibm.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Eric Whitney <eric.whitney@hp.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-15 08:53:12 -08:00

80 lines
2.1 KiB
C

/*
* 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>
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 */