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

   1/*
   2 * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
   3 * Adapted for the alpha wildfire architecture Jan 2001.
   4 */
   5#ifndef _ASM_MMZONE_H_
   6#define _ASM_MMZONE_H_
   7
   8#include <asm/smp.h>
   9
  10struct bootmem_data_t; /* stupid forward decl. */
  11
  12/*
  13 * Following are macros that are specific to this numa platform.
  14 */
  15
  16extern pg_data_t node_data[];
  17
  18#define alpha_pa_to_nid(pa)             \
  19        (alpha_mv.pa_to_nid             \
  20         ? alpha_mv.pa_to_nid(pa)       \
  21         : (0))
  22#define node_mem_start(nid)             \
  23        (alpha_mv.node_mem_start        \
  24         ? alpha_mv.node_mem_start(nid) \
  25         : (0UL))
  26#define node_mem_size(nid)              \
  27        (alpha_mv.node_mem_size         \
  28         ? alpha_mv.node_mem_size(nid)  \
  29         : ((nid) ? (0UL) : (~0UL)))
  30
  31#define pa_to_nid(pa)           alpha_pa_to_nid(pa)
  32#define NODE_DATA(nid)          (&node_data[(nid)])
  33
  34#define node_localnr(pfn, nid)  ((pfn) - NODE_DATA(nid)->node_start_pfn)
  35
  36#if 1
  37#define PLAT_NODE_DATA_LOCALNR(p, n)    \
  38        (((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
  39#else
  40static inline unsigned long
  41PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
  42{
  43        unsigned long temp;
  44        temp = p >> PAGE_SHIFT;
  45        return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
  46}
  47#endif
  48
  49#ifdef CONFIG_DISCONTIGMEM
  50
  51/*
  52 * Following are macros that each numa implementation must define.
  53 */
  54
  55/*
  56 * Given a kernel address, find the home node of the underlying memory.
  57 */
  58#define kvaddr_to_nid(kaddr)    pa_to_nid(__pa(kaddr))
  59
  60/*
  61 * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
  62 * and returns the kaddr corresponding to first physical page in the
  63 * node's mem_map.
  64 */
  65#define LOCAL_BASE_ADDR(kaddr)                                            \
  66    ((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn  \
  67                         << PAGE_SHIFT))
  68
  69/* XXX: FIXME -- nyc */
  70#define kern_addr_valid(kaddr)  (0)
  71
  72#define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
  73
  74#define VALID_PAGE(page)        (((page) - mem_map) < max_mapnr)
  75
  76#define pmd_page(pmd)           (pfn_to_page(pmd_val(pmd) >> 32))
  77#define pgd_page(pgd)           (pfn_to_page(pgd_val(pgd) >> 32))
  78#define pte_pfn(pte)            (pte_val(pte) >> 32)
  79
  80#define mk_pte(page, pgprot)                                                 \
  81({                                                                           \
  82        pte_t pte;                                                           \
  83        unsigned long pfn;                                                   \
  84                                                                             \
  85        pfn = page_to_pfn(page) << 32; \
  86        pte_val(pte) = pfn | pgprot_val(pgprot);                             \
  87                                                                             \
  88        pte;                                                                 \
  89})
  90
  91#define pte_page(x)                                                     \
  92({                                                                      \
  93        unsigned long kvirt;                                            \
  94        struct page * __xx;                                             \
  95                                                                        \
  96        kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT));     \
  97        __xx = virt_to_page(kvirt);                                     \
  98                                                                        \
  99        __xx;                                                           \
 100})
 101
 102#define page_to_pa(page)                                                \
 103        (page_to_pfn(page) << PAGE_SHIFT)
 104
 105#define pfn_to_nid(pfn)         pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
 106#define pfn_valid(pfn)                                                  \
 107        (((pfn) - node_start_pfn(pfn_to_nid(pfn))) <                    \
 108         node_spanned_pages(pfn_to_nid(pfn)))                                   \
 109
 110#define virt_addr_valid(kaddr)  pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
 111
 112#endif /* CONFIG_DISCONTIGMEM */
 113
 114#endif /* _ASM_MMZONE_H_ */
 115