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 PLAT_NODE_DATA_LOCALNR(unsigned long p,int n)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 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_ */ 113