kernel/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
  10 struct bootmem_data_t; /* stupid forward decl. */
  11
  12 /*
  13  * Following are macros that are specific to this numa platform.
  14  */
  15
  16 extern 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
  40 static inline unsigned long
  41 PLAT_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 pmd_page(pmd)           (pfn_to_page(pmd_val(pmd) >> 32))
  75 #define pgd_page(pgd)           (pfn_to_page(pgd_val(pgd) >> 32))
  76 #define pte_pfn(pte)            (pte_val(pte) >> 32)
  77
  78 #define mk_pte(page, pgprot)                                                 \
  79 ({                                                                           \
  80         pte_t pte;                                                           \
  81         unsigned long pfn;                                                   \
  82                                                                              \
  83         pfn = page_to_pfn(page) << 32; \
  84         pte_val(pte) = pfn | pgprot_val(pgprot);                             \
  85                                                                              \
  86         pte;                                                                 \
  87 })
  88
  89 #define pte_page(x)                                                     \
  90 ({                                                                      \
  91         unsigned long kvirt;                                            \
  92         struct page * __xx;                                             \
  93                                                                         \
  94         kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT));     \
  95         __xx = virt_to_page(kvirt);                                     \
  96                                                                         \
  97         __xx;                                                           \
  98 })
  99
 100 #define page_to_pa(page)                                                \
 101         (page_to_pfn(page) << PAGE_SHIFT)
 102
 103 #define pfn_to_nid(pfn)         pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
 104 #define pfn_valid(pfn)                                                  \
 105         (((pfn) - node_start_pfn(pfn_to_nid(pfn))) <                    \
 106          node_spanned_pages(pfn_to_nid(pfn)))                                   \
 107
 108 #define virt_addr_valid(kaddr)  pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
 109
 110 #endif /* CONFIG_DISCONTIGMEM */
 111
 112 #endif /* _ASM_MMZONE_H_ */