include/asm-ia64/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
  25 extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
  26 extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
  27 extern pg_data_t *pgdat_list[MAX_NUMNODES];
  28
  29 /* Stuff below this line could be architecture independent */
  30
  31 extern 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
  38 struct 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
  45 struct node_cpuid_s {
  46         u16     phys_id;        /* id << 8 | eid */
  47         int     nid;            /* logical node containing this CPU */
  48 };
  49
  50 extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
  51 extern 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
  61 extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
  62 #define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)])
  63
  64 extern int paddr_to_nid(unsigned long paddr);
  65
  66 #define local_nodeid (cpu_to_node_map[smp_processor_id()])
  67
  68 extern void map_cpu_to_node(int cpu, int nid);
  69 extern void unmap_cpu_from_node(int cpu, int nid);
  70
  71
  72 #else /* !CONFIG_NUMA */
  73 #define map_cpu_to_node(cpu, nid)       do{}while(0)
  74 #define unmap_cpu_from_node(cpu, nid)   do{}while(0)
  75
  76 #define paddr_to_nid(addr)      0
  77
  78 #endif /* CONFIG_NUMA */
  79
  80 #endif /* _ASM_IA64_NUMA_H */