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numa.h

numa.h 2.2 KB
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  1. /*
    2. 

  2.  * This file is subject to the terms and conditions of the GNU General Public
    3. 

  3.  * License.  See the file "COPYING" in the main directory of this archive
    4. 

  4.  * for more details.
    5. 

  5.  *
    6. 

  6.  * This file contains NUMA specific prototypes and definitions.
    7. 

  7.  *
    8. 

  8.  * 2002/08/05 Erich Focht <efocht@ess.nec.de>
    9. 

  9.  *
    10. 

  10.  */
    11. 

  11. #ifndef _ASM_IA64_NUMA_H
    12. 

  12. #define _ASM_IA64_NUMA_H
    13. 

  13. 

  14. 

  15. #ifdef CONFIG_NUMA
    16. 

  16. 

  17. #include <linux/cache.h>
    18. 

  18. #include <linux/cpumask.h>
    19. 

  19. #include <linux/numa.h>
    20. 

  20. #include <linux/smp.h>
    21. 

  21. #include <linux/threads.h>
    22. 

  22. 

  23. #include <asm/mmzone.h>
    24. 

  24. 

  25. extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
    26. 

  26. extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
    27. 

  27. extern pg_data_t *pgdat_list[MAX_NUMNODES];
    28. 

  28. 

  29. /* Stuff below this line could be architecture independent */
    30. 

  30. 

  31. extern int num_node_memblks;		/* total number of memory chunks */
    32. 

  32. 

  33. /*
    34. 

  34.  * List of node memory chunks. Filled when parsing SRAT table to
    35. 

  35.  * obtain information about memory nodes.
    36. 

  36. */
    37. 

  37. 

  38. struct node_memblk_s {
    39. 

  39. 	unsigned long start_paddr;
    40. 

  40. 	unsigned long size;
    41. 

  41. 	int nid;		/* which logical node contains this chunk? */
    42. 

  42. 	int bank;		/* which mem bank on this node */
    43. 

  43. };
    44. 

  44. 

  45. struct node_cpuid_s {
    46. 

  46. 	u16	phys_id;	/* id << 8 | eid */
    47. 

  47. 	int	nid;		/* logical node containing this CPU */
    48. 

  48. };
    49. 

  49. 

  50. extern struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
    51. 

  51. extern struct node_cpuid_s node_cpuid[NR_CPUS];
    52. 

  52. 

  53. /*
    54. 

  54.  * ACPI 2.0 SLIT (System Locality Information Table)
    55. 

  55.  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
    56. 

  56.  *
    57. 

  57.  * This is a matrix with "distances" between nodes, they should be
    58. 

  58.  * proportional to the memory access latency ratios.
    59. 

  59.  */
    60. 

  60. 

  61. extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
    62. 

  62. #define node_distance(from,to) (numa_slit[(from) * MAX_NUMNODES + (to)])
    63. 

  63. 

  64. extern int paddr_to_nid(unsigned long paddr);
    65. 

  65. 

  66. #define local_nodeid (cpu_to_node_map[smp_processor_id()])
    67. 

  67. 

  68. extern void map_cpu_to_node(int cpu, int nid);
    69. 

  69. extern void unmap_cpu_from_node(int cpu, int nid);
    70. 

  70. extern void numa_clear_node(int cpu);
    71. 

  71. 

  72. #else /* !CONFIG_NUMA */
    73. 

  73. #define map_cpu_to_node(cpu, nid)	do{}while(0)
    74. 

  74. #define unmap_cpu_from_node(cpu, nid)	do{}while(0)
    75. 

  75. #define paddr_to_nid(addr)	0
    76. 

  76. #define numa_clear_node(cpu)	do { } while (0)
    77. 

  77. #endif /* CONFIG_NUMA */
    78. 

  78. 

  79. #endif /* _ASM_IA64_NUMA_H */
    80.