arch/powerpc/include/asm/mmzone.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
   4  *
   5  * PowerPC64 port:
   6  * Copyright (C) 2002 Anton Blanchard, IBM Corp.
   7  */
   8 #ifndef _ASM_MMZONE_H_
   9 #define _ASM_MMZONE_H_
  10 #ifdef __KERNEL__
  11
  12 #include <linux/cpumask.h>
  13
  14 /*
  15  * generic non-linear memory support:
  16  *
  17  * 1) we will not split memory into more chunks than will fit into the
  18  *    flags field of the struct page
  19  */
  20
  21 #ifdef CONFIG_NEED_MULTIPLE_NODES
  22
  23 extern struct pglist_data *node_data[];
  24 /*
  25  * Return a pointer to the node data for node n.
  26  */
  27 #define NODE_DATA(nid)          (node_data[nid])
  28
  29 /*
  30  * Following are specific to this numa platform.
  31  */
  32
  33 extern int numa_cpu_lookup_table[];
  34 extern cpumask_var_t node_to_cpumask_map[];
  35 #ifdef CONFIG_MEMORY_HOTPLUG
  36 extern unsigned long max_pfn;
  37 u64 memory_hotplug_max(void);
  38 #else
  39 #define memory_hotplug_max() memblock_end_of_DRAM()
  40 #endif
  41
  42 #else
  43 #define memory_hotplug_max() memblock_end_of_DRAM()
  44 #endif /* CONFIG_NEED_MULTIPLE_NODES */
  45 #ifdef CONFIG_FA_DUMP
  46 #define __HAVE_ARCH_RESERVED_KERNEL_PAGES
  47 #endif
  48
  49 #ifdef CONFIG_MEMORY_HOTPLUG
  50 extern int create_section_mapping(unsigned long start, unsigned long end,
  51                                   int nid, pgprot_t prot);
  52 #endif
  53
  54 #endif /* __KERNEL__ */
  55 #endif /* _ASM_MMZONE_H_ */