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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5270 | serge | 1 | #ifndef __ASM_MEMORY_MODEL_H |
| 2 | #define __ASM_MEMORY_MODEL_H |
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| 3 | |||
| 4 | #ifndef __ASSEMBLY__ |
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| 5 | |||
| 6 | #if defined(CONFIG_FLATMEM) |
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| 7 | |||
| 8 | #ifndef ARCH_PFN_OFFSET |
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| 9 | #define ARCH_PFN_OFFSET (0UL) |
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| 10 | #endif |
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| 11 | |||
| 12 | #elif defined(CONFIG_DISCONTIGMEM) |
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| 13 | |||
| 14 | #ifndef arch_pfn_to_nid |
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| 15 | #define arch_pfn_to_nid(pfn) pfn_to_nid(pfn) |
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| 16 | #endif |
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| 17 | |||
| 18 | #ifndef arch_local_page_offset |
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| 19 | #define arch_local_page_offset(pfn, nid) \ |
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| 20 | ((pfn) - NODE_DATA(nid)->node_start_pfn) |
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| 21 | #endif |
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| 22 | |||
| 23 | #endif /* CONFIG_DISCONTIGMEM */ |
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| 24 | |||
| 25 | /* |
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| 26 | * supports 3 memory models. |
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| 27 | */ |
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| 28 | #if defined(CONFIG_FLATMEM) |
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| 29 | |||
| 30 | #define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET)) |
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| 31 | #define __page_to_pfn(page) ((unsigned long)((page) - mem_map) + \ |
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| 32 | ARCH_PFN_OFFSET) |
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| 33 | #elif defined(CONFIG_DISCONTIGMEM) |
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| 34 | |||
| 35 | #define __pfn_to_page(pfn) \ |
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| 36 | ({ unsigned long __pfn = (pfn); \ |
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| 37 | unsigned long __nid = arch_pfn_to_nid(__pfn); \ |
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| 38 | NODE_DATA(__nid)->node_mem_map + arch_local_page_offset(__pfn, __nid);\ |
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| 39 | }) |
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| 40 | |||
| 41 | #define __page_to_pfn(pg) \ |
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| 42 | ({ const struct page *__pg = (pg); \ |
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| 43 | struct pglist_data *__pgdat = NODE_DATA(page_to_nid(__pg)); \ |
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| 44 | (unsigned long)(__pg - __pgdat->node_mem_map) + \ |
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| 45 | __pgdat->node_start_pfn; \ |
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| 46 | }) |
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| 47 | |||
| 48 | #elif defined(CONFIG_SPARSEMEM_VMEMMAP) |
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| 49 | |||
| 50 | /* memmap is virtually contiguous. */ |
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| 51 | #define __pfn_to_page(pfn) (vmemmap + (pfn)) |
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| 52 | #define __page_to_pfn(page) (unsigned long)((page) - vmemmap) |
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| 53 | |||
| 54 | #elif defined(CONFIG_SPARSEMEM) |
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| 55 | /* |
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| 56 | * Note: section's mem_map is encoded to reflect its start_pfn. |
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| 57 | * section[i].section_mem_map == mem_map's address - start_pfn; |
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| 58 | */ |
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| 59 | #define __page_to_pfn(pg) \ |
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| 60 | ({ const struct page *__pg = (pg); \ |
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| 61 | int __sec = page_to_section(__pg); \ |
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| 62 | (unsigned long)(__pg - __section_mem_map_addr(__nr_to_section(__sec))); \ |
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| 63 | }) |
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| 64 | |||
| 65 | #define __pfn_to_page(pfn) \ |
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| 66 | ({ unsigned long __pfn = (pfn); \ |
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| 67 | struct mem_section *__sec = __pfn_to_section(__pfn); \ |
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| 68 | __section_mem_map_addr(__sec) + __pfn; \ |
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| 69 | }) |
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| 70 | #endif /* CONFIG_FLATMEM/DISCONTIGMEM/SPARSEMEM */ |
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| 71 | |||
| 6082 | serge | 72 | /* |
| 73 | * Convert a physical address to a Page Frame Number and back |
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| 74 | */ |
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| 75 | #define __phys_to_pfn(paddr) ((unsigned long)((paddr) >> PAGE_SHIFT)) |
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| 76 | #define __pfn_to_phys(pfn) PFN_PHYS(pfn) |
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| 77 | |||
| 5270 | serge | 78 | #define page_to_pfn __page_to_pfn |
| 79 | #define pfn_to_page __pfn_to_page |
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| 80 | |||
| 81 | #endif /* __ASSEMBLY__ */ |
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| 82 | |||
| 83 | #endif |