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Linux/arch/alpha/include/asm/mmzone.h

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

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