LXR linux/arch/ia64/include/asm/numa.h

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * This file contains NUMA specific prototypes and definitions.
   7 *
   8 * 2002/08/05 Erich Focht <efocht@ess.nec.de>
   9 *
  10 */
  11#ifndef _ASM_IA64_NUMA_H
  12#define _ASM_IA64_NUMA_H
  13
  14
  15#ifdef CONFIG_NUMA
  16
  17#include <linux/cache.h>
  18#include <linux/cpumask.h>
  19#include <linux/numa.h>
  20#include <linux/smp.h>
  21#include <linux/threads.h>
  22
  23#include <asm/mmzone.h>
  24
  25extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
  26extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
  27extern pg_data_t *pgdat_list[MAX_NUMNODES];
  28
  29/* Stuff below this line could be architecture independent */
  30
  31extern int num_node_memblks;            /* total number of memory chunks */
  32
  33/*
  34 * List of node memory chunks. Filled when parsing SRAT table to
  35 * obtain information about memory nodes.
  36*/
  37
  38struct node_memblk_s {
  39        unsigned long start_paddr;
  40        unsigned long size;
  41        int nid;                /* which logical node contains this chunk? */
  42        int bank;               /* which mem bank on this node */
  43};
  44
  45struct node_cpuid_s {
  46        u16     phys_id;        /* id << 8 | eid */
  47        int     nid;            /* logical node containing this CPU */
  48};
  49
  50extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
  51extern struct node_cpuid_s node_cpuid[NR_CPUS];
  52
  53/*
  54 * ACPI 2.0 SLIT (System Locality Information Table)
  55 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
  56 *
  57 * This is a matrix with "distances" between nodes, they should be
  58 * proportional to the memory access latency ratios.
  59 */
  60
  61extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
  62#define slit_distance(from,to) (numa_slit[(from) * MAX_NUMNODES + (to)])
  63extern int __node_distance(int from, int to);
  64#define node_distance(from,to) __node_distance(from, to)
  65
  66extern int paddr_to_nid(unsigned long paddr);
  67
  68#define local_nodeid (cpu_to_node_map[smp_processor_id()])
  69
  70#define numa_off     0
  71
  72extern void map_cpu_to_node(int cpu, int nid);
  73extern void unmap_cpu_from_node(int cpu, int nid);
  74extern void numa_clear_node(int cpu);
  75
  76#else /* !CONFIG_NUMA */
  77#define map_cpu_to_node(cpu, nid)       do{}while(0)
  78#define unmap_cpu_from_node(cpu, nid)   do{}while(0)
  79#define paddr_to_nid(addr)      0
  80#define numa_clear_node(cpu)    do { } while (0)
  81#endif /* CONFIG_NUMA */
  82
  83#endif /* _ASM_IA64_NUMA_H */
  84