LXR linux/arch/tile/include/asm/mmzone.h

   1/*
   2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3 *
   4 *   This program is free software; you can redistribute it and/or
   5 *   modify it under the terms of the GNU General Public License
   6 *   as published by the Free Software Foundation, version 2.
   7 *
   8 *   This program is distributed in the hope that it will be useful, but
   9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11 *   NON INFRINGEMENT.  See the GNU General Public License for
  12 *   more details.
  13 */
  14
  15#ifndef _ASM_TILE_MMZONE_H
  16#define _ASM_TILE_MMZONE_H
  17
  18extern struct pglist_data node_data[];
  19#define NODE_DATA(nid)  (&node_data[nid])
  20
  21extern void get_memcfg_numa(void);
  22
  23#ifdef CONFIG_DISCONTIGMEM
  24
  25#include <asm/page.h>
  26
  27/*
  28 * Generally, memory ranges are always doled out by the hypervisor in
  29 * fixed-size, power-of-two increments.  That would make computing the node
  30 * very easy.  We could just take a couple high bits of the PA, which
  31 * denote the memory shim, and we'd be done.  However, when we're doing
  32 * memory striping, this may not be true; PAs with different high bit
  33 * values might be in the same node.  Thus, we keep a lookup table to
  34 * translate the high bits of the PFN to the node number.
  35 */
  36extern int highbits_to_node[];
  37
  38static inline int pfn_to_nid(unsigned long pfn)
  39{
  40        return highbits_to_node[__pfn_to_highbits(pfn)];
  41}
  42
  43#define kern_addr_valid(kaddr)  virt_addr_valid((void *)kaddr)
  44
  45static inline int pfn_valid(int pfn)
  46{
  47        int nid = pfn_to_nid(pfn);
  48
  49        if (nid >= 0)
  50                return (pfn < node_end_pfn(nid));
  51        return 0;
  52}
  53
  54/* Information on the NUMA nodes that we compute early */
  55extern unsigned long node_start_pfn[];
  56extern unsigned long node_end_pfn[];
  57extern unsigned long node_memmap_pfn[];
  58extern unsigned long node_percpu_pfn[];
  59extern unsigned long node_free_pfn[];
  60#ifdef CONFIG_HIGHMEM
  61extern unsigned long node_lowmem_end_pfn[];
  62#endif
  63#ifdef CONFIG_PCI
  64extern unsigned long pci_reserve_start_pfn;
  65extern unsigned long pci_reserve_end_pfn;
  66#endif
  67
  68#endif /* CONFIG_DISCONTIGMEM */
  69
  70#endif /* _ASM_TILE_MMZONE_H */
  71