include/asm-powerpc/mmzone.h

   1 /*
   2  * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
   3  *
   4  * PowerPC64 port:
   5  * Copyright (C) 2002 Anton Blanchard, IBM Corp.
   6  */
   7 #ifndef _ASM_MMZONE_H_
   8 #define _ASM_MMZONE_H_
   9
  10 #include <linux/config.h>
  11
  12 /*
  13  * generic non-linear memory support:
  14  *
  15  * 1) we will not split memory into more chunks than will fit into the
  16  *    flags field of the struct page
  17  */
  18
  19 #ifdef CONFIG_NEED_MULTIPLE_NODES
  20
  21 extern struct pglist_data *node_data[];
  22 /*
  23  * Return a pointer to the node data for node n.
  24  */
  25 #define NODE_DATA(nid)          (node_data[nid])
  26
  27 /*
  28  * Following are specific to this numa platform.
  29  */
  30
  31 extern int numa_cpu_lookup_table[];
  32 extern cpumask_t numa_cpumask_lookup_table[];
  33 #ifdef CONFIG_MEMORY_HOTPLUG
  34 extern unsigned long max_pfn;
  35 #endif
  36
  37 /*
  38  * Following are macros that each numa implmentation must define.
  39  */
  40
  41 #define node_start_pfn(nid)     (NODE_DATA(nid)->node_start_pfn)
  42 #define node_end_pfn(nid)       (NODE_DATA(nid)->node_end_pfn)
  43
  44 #endif /* CONFIG_NEED_MULTIPLE_NODES */
  45
  46 #ifdef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
  47 extern int __init early_pfn_to_nid(unsigned long pfn);
  48 #endif
  49
  50 #endif /* _ASM_MMZONE_H_ */