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 #ifdef CONFIG_DISCONTIGMEM 10 11 #include <asm/smp.h> 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 PLAT_NODE_DATA_LOCALNR(unsigned long p,int n)42PLAT_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 /* 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 mk_pte(page, pgprot) \ 72 ({ \ 73 pte_t pte; \ 74 unsigned long pfn; \ 75 \ 76 pfn = page_to_pfn(page) << 32; \ 77 pte_val(pte) = pfn | pgprot_val(pgprot); \ 78 \ 79 pte; \ 80 }) 81 82 #define pte_page(x) \ 83 ({ \ 84 unsigned long kvirt; \ 85 struct page * __xx; \ 86 \ 87 kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT)); \ 88 __xx = virt_to_page(kvirt); \ 89 \ 90 __xx; \ 91 }) 92 93 #define pfn_to_nid(pfn) pa_to_nid(((u64)(pfn) << PAGE_SHIFT)) 94 #define pfn_valid(pfn) \ 95 (((pfn) - node_start_pfn(pfn_to_nid(pfn))) < \ 96 node_spanned_pages(pfn_to_nid(pfn))) \ 97 98 #endif /* CONFIG_DISCONTIGMEM */ 99 100 #endif /* _ASM_MMZONE_H_ */ 101