arch/powerpc/include/asm/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 #ifdef __KERNEL__
  10
  11 #include <linux/cpumask.h>
  12
  13 /*
  14  * generic non-linear memory support:
  15  *
  16  * 1) we will not split memory into more chunks than will fit into the
  17  *    flags field of the struct page
  18  */
  19
  20 #ifdef CONFIG_NEED_MULTIPLE_NODES
  21
  22 extern struct pglist_data *node_data[];
  23 /*
  24  * Return a pointer to the node data for node n.
  25  */
  26 #define NODE_DATA(nid)          (node_data[nid])
  27
  28 /*
  29  * Following are specific to this numa platform.
  30  */
  31
  32 extern int numa_cpu_lookup_table[];
  33 extern cpumask_var_t node_to_cpumask_map[];
  34 #ifdef CONFIG_MEMORY_HOTPLUG
  35 extern unsigned long max_pfn;
  36 u64 memory_hotplug_max(void);
  37 #else
  38 #define memory_hotplug_max() memblock_end_of_DRAM()
  39 #endif
  40
  41 /*
  42  * Following are macros that each numa implmentation must define.
  43  */
  44
  45 #define node_start_pfn(nid)     (NODE_DATA(nid)->node_start_pfn)
  46 #define node_end_pfn(nid)       (NODE_DATA(nid)->node_end_pfn)
  47
  48 #else
  49 #define memory_hotplug_max() memblock_end_of_DRAM()
  50 #endif /* CONFIG_NEED_MULTIPLE_NODES */
  51
  52 #endif /* __KERNEL__ */
  53 #endif /* _ASM_MMZONE_H_ */