1a117e66eSKAMEZAWA Hiroyuki #ifndef __ASM_MEMORY_MODEL_H 2a117e66eSKAMEZAWA Hiroyuki #define __ASM_MEMORY_MODEL_H 3a117e66eSKAMEZAWA Hiroyuki 4a117e66eSKAMEZAWA Hiroyuki #ifndef __ASSEMBLY__ 5a117e66eSKAMEZAWA Hiroyuki 6a117e66eSKAMEZAWA Hiroyuki #if defined(CONFIG_FLATMEM) 7a117e66eSKAMEZAWA Hiroyuki 8a117e66eSKAMEZAWA Hiroyuki #ifndef ARCH_PFN_OFFSET 9a117e66eSKAMEZAWA Hiroyuki #define ARCH_PFN_OFFSET (0UL) 10a117e66eSKAMEZAWA Hiroyuki #endif 11a117e66eSKAMEZAWA Hiroyuki 12a117e66eSKAMEZAWA Hiroyuki #elif defined(CONFIG_DISCONTIGMEM) 13a117e66eSKAMEZAWA Hiroyuki 14a117e66eSKAMEZAWA Hiroyuki #ifndef arch_pfn_to_nid 15a117e66eSKAMEZAWA Hiroyuki #define arch_pfn_to_nid(pfn) pfn_to_nid(pfn) 16a117e66eSKAMEZAWA Hiroyuki #endif 17a117e66eSKAMEZAWA Hiroyuki 18a117e66eSKAMEZAWA Hiroyuki #ifndef arch_local_page_offset 19a117e66eSKAMEZAWA Hiroyuki #define arch_local_page_offset(pfn, nid) \ 20a117e66eSKAMEZAWA Hiroyuki ((pfn) - NODE_DATA(nid)->node_start_pfn) 21a117e66eSKAMEZAWA Hiroyuki #endif 22a117e66eSKAMEZAWA Hiroyuki 23a117e66eSKAMEZAWA Hiroyuki #endif /* CONFIG_DISCONTIGMEM */ 24a117e66eSKAMEZAWA Hiroyuki 25a117e66eSKAMEZAWA Hiroyuki /* 26a117e66eSKAMEZAWA Hiroyuki * supports 3 memory models. 27a117e66eSKAMEZAWA Hiroyuki */ 28a117e66eSKAMEZAWA Hiroyuki #if defined(CONFIG_FLATMEM) 29a117e66eSKAMEZAWA Hiroyuki 3067de6482SAndy Whitcroft #define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET)) 3167de6482SAndy Whitcroft #define __page_to_pfn(page) ((unsigned long)((page) - mem_map) + \ 32a117e66eSKAMEZAWA Hiroyuki ARCH_PFN_OFFSET) 33a117e66eSKAMEZAWA Hiroyuki #elif defined(CONFIG_DISCONTIGMEM) 34a117e66eSKAMEZAWA Hiroyuki 3567de6482SAndy Whitcroft #define __pfn_to_page(pfn) \ 36a117e66eSKAMEZAWA Hiroyuki ({ unsigned long __pfn = (pfn); \ 37c5d71243SRafael J. Wysocki unsigned long __nid = arch_pfn_to_nid(__pfn); \ 38a117e66eSKAMEZAWA Hiroyuki NODE_DATA(__nid)->node_mem_map + arch_local_page_offset(__pfn, __nid);\ 39a117e66eSKAMEZAWA Hiroyuki }) 40a117e66eSKAMEZAWA Hiroyuki 4167de6482SAndy Whitcroft #define __page_to_pfn(pg) \ 42aa462abeSIan Campbell ({ const struct page *__pg = (pg); \ 43a0140c1dSKAMEZAWA Hiroyuki struct pglist_data *__pgdat = NODE_DATA(page_to_nid(__pg)); \ 44a0140c1dSKAMEZAWA Hiroyuki (unsigned long)(__pg - __pgdat->node_mem_map) + \ 45a0140c1dSKAMEZAWA Hiroyuki __pgdat->node_start_pfn; \ 46a117e66eSKAMEZAWA Hiroyuki }) 47a117e66eSKAMEZAWA Hiroyuki 488f6aac41SChristoph Lameter #elif defined(CONFIG_SPARSEMEM_VMEMMAP) 498f6aac41SChristoph Lameter 50af901ca1SAndré Goddard Rosa /* memmap is virtually contiguous. */ 518f6aac41SChristoph Lameter #define __pfn_to_page(pfn) (vmemmap + (pfn)) 5232272a26SMartin Schwidefsky #define __page_to_pfn(page) (unsigned long)((page) - vmemmap) 538f6aac41SChristoph Lameter 54a117e66eSKAMEZAWA Hiroyuki #elif defined(CONFIG_SPARSEMEM) 55a117e66eSKAMEZAWA Hiroyuki /* 561a49123bSZhang Yanfei * Note: section's mem_map is encoded to reflect its start_pfn. 57a117e66eSKAMEZAWA Hiroyuki * section[i].section_mem_map == mem_map's address - start_pfn; 58a117e66eSKAMEZAWA Hiroyuki */ 5967de6482SAndy Whitcroft #define __page_to_pfn(pg) \ 60aa462abeSIan Campbell ({ const struct page *__pg = (pg); \ 61a117e66eSKAMEZAWA Hiroyuki int __sec = page_to_section(__pg); \ 62f05b6284SRandy Dunlap (unsigned long)(__pg - __section_mem_map_addr(__nr_to_section(__sec))); \ 63a117e66eSKAMEZAWA Hiroyuki }) 64a117e66eSKAMEZAWA Hiroyuki 6567de6482SAndy Whitcroft #define __pfn_to_page(pfn) \ 66a117e66eSKAMEZAWA Hiroyuki ({ unsigned long __pfn = (pfn); \ 67a117e66eSKAMEZAWA Hiroyuki struct mem_section *__sec = __pfn_to_section(__pfn); \ 68a117e66eSKAMEZAWA Hiroyuki __section_mem_map_addr(__sec) + __pfn; \ 69a117e66eSKAMEZAWA Hiroyuki }) 70a117e66eSKAMEZAWA Hiroyuki #endif /* CONFIG_FLATMEM/DISCONTIGMEM/SPARSEMEM */ 7167de6482SAndy Whitcroft 72012dcef3SChristoph Hellwig /* 73012dcef3SChristoph Hellwig * Convert a physical address to a Page Frame Number and back 74012dcef3SChristoph Hellwig */ 75012dcef3SChristoph Hellwig #define __phys_to_pfn(paddr) ((unsigned long)((paddr) >> PAGE_SHIFT)) 76ae4f9769STyler Baker #define __pfn_to_phys(pfn) PFN_PHYS(pfn) 77012dcef3SChristoph Hellwig 7867de6482SAndy Whitcroft #define page_to_pfn __page_to_pfn 7967de6482SAndy Whitcroft #define pfn_to_page __pfn_to_page 80a117e66eSKAMEZAWA Hiroyuki 81a117e66eSKAMEZAWA Hiroyuki #endif /* __ASSEMBLY__ */ 82a117e66eSKAMEZAWA Hiroyuki 83a117e66eSKAMEZAWA Hiroyuki #endif 84