arch/alpha/include/asm/mmzone.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
   4  * Adapted for the alpha wildfire architecture Jan 2001.
   5  */
   6 #ifndef _ASM_MMZONE_H_
   7 #define _ASM_MMZONE_H_
   8
   9 #include <asm/smp.h>
  10
  11 /*
  12  * Following are macros that are specific to this numa platform.
  13  */
  14
  15 extern pg_data_t node_data[];
  16
  17 #define alpha_pa_to_nid(pa)             \
  18         (alpha_mv.pa_to_nid             \
  19          ? alpha_mv.pa_to_nid(pa)       \
  20          : (0))
  21 #define node_mem_start(nid)             \
  22         (alpha_mv.node_mem_start        \
  23          ? alpha_mv.node_mem_start(nid) \
  24          : (0UL))
  25 #define node_mem_size(nid)              \
  26         (alpha_mv.node_mem_size         \
  27          ? alpha_mv.node_mem_size(nid)  \
  28          : ((nid) ? (0UL) : (~0UL)))
  29
  30 #define pa_to_nid(pa)           alpha_pa_to_nid(pa)
  31 #define NODE_DATA(nid)          (&node_data[(nid)])
  32
  33 #define node_localnr(pfn, nid)  ((pfn) - NODE_DATA(nid)->node_start_pfn)
  34
  35 #if 1
  36 #define PLAT_NODE_DATA_LOCALNR(p, n)    \
  37         (((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
  38 #else
  39 static inline unsigned long
  40 PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
  41 {
  42         unsigned long temp;
  43         temp = p >> PAGE_SHIFT;
  44         return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
  45 }
  46 #endif
  47
  48 #ifdef CONFIG_DISCONTIGMEM
  49
  50 /*
  51  * Following are macros that each numa implementation must define.
  52  */
  53
  54 /*
  55  * Given a kernel address, find the home node of the underlying memory.
  56  */
  57 #define kvaddr_to_nid(kaddr)    pa_to_nid(__pa(kaddr))
  58
  59 /*
  60  * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
  61  * and returns the kaddr corresponding to first physical page in the
  62  * node's mem_map.
  63  */
  64 #define LOCAL_BASE_ADDR(kaddr)                                            \
  65     ((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn  \
  66                          << PAGE_SHIFT))
  67
  68 /* XXX: FIXME -- nyc */
  69 #define kern_addr_valid(kaddr)  (0)
  70
  71 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
  72
  73 #define pmd_page(pmd)           (pfn_to_page(pmd_val(pmd) >> 32))
  74 #define pte_pfn(pte)            (pte_val(pte) >> 32)
  75
  76 #define mk_pte(page, pgprot)                                                 \
  77 ({                                                                           \
  78         pte_t pte;                                                           \
  79         unsigned long pfn;                                                   \
  80                                                                              \
  81         pfn = page_to_pfn(page) << 32; \
  82         pte_val(pte) = pfn | pgprot_val(pgprot);                             \
  83                                                                              \
  84         pte;                                                                 \
  85 })
  86
  87 #define pte_page(x)                                                     \
  88 ({                                                                      \
  89         unsigned long kvirt;                                            \
  90         struct page * __xx;                                             \
  91                                                                         \
  92         kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT));     \
  93         __xx = virt_to_page(kvirt);                                     \
  94                                                                         \
  95         __xx;                                                           \
  96 })
  97
  98 #define page_to_pa(page)                                                \
  99         (page_to_pfn(page) << PAGE_SHIFT)
 100
 101 #define pfn_to_nid(pfn)         pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
 102 #define pfn_valid(pfn)                                                  \
 103         (((pfn) - node_start_pfn(pfn_to_nid(pfn))) <                    \
 104          node_spanned_pages(pfn_to_nid(pfn)))                                   \
 105
 106 #define virt_addr_valid(kaddr)  pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
 107
 108 #endif /* CONFIG_DISCONTIGMEM */
 109
 110 #endif /* _ASM_MMZONE_H_ */