projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| f5df8e26 JH |
2 | #ifndef _METAG_PAGE_H |
| 3 | #define _METAG_PAGE_H | |
| 4 | ||
| 5 | #include <linux/const.h> | |
| 6 | ||
| 7 | #include <asm/metag_mem.h> | |
| 8 | ||
| 9 | /* PAGE_SHIFT determines the page size */ | |
| 10 | #if defined(CONFIG_PAGE_SIZE_4K) | |
| 11 | #define PAGE_SHIFT 12 | |
| 12 | #elif defined(CONFIG_PAGE_SIZE_8K) | |
| 13 | #define PAGE_SHIFT 13 | |
| 14 | #elif defined(CONFIG_PAGE_SIZE_16K) | |
| 15 | #define PAGE_SHIFT 14 | |
| 16 | #endif | |
| 17 | ||
| 18 | #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) | |
| 19 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
| 20 | ||
| 21 | #if defined(CONFIG_HUGETLB_PAGE_SIZE_8K) | |
| 22 | # define HPAGE_SHIFT 13 | |
| 23 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_16K) | |
| 24 | # define HPAGE_SHIFT 14 | |
| 25 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_32K) | |
| 26 | # define HPAGE_SHIFT 15 | |
| 27 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) | |
| 28 | # define HPAGE_SHIFT 16 | |
| 29 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_128K) | |
| 30 | # define HPAGE_SHIFT 17 | |
| 31 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K) | |
| 32 | # define HPAGE_SHIFT 18 | |
| 33 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) | |
| 34 | # define HPAGE_SHIFT 19 | |
| 35 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_1M) | |
| 36 | # define HPAGE_SHIFT 20 | |
| 37 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_2M) | |
| 38 | # define HPAGE_SHIFT 21 | |
| 39 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_4M) | |
| 40 | # define HPAGE_SHIFT 22 | |
| 41 | #endif | |
| 42 | ||
| 43 | #ifdef CONFIG_HUGETLB_PAGE | |
| 44 | # define HPAGE_SIZE (1UL << HPAGE_SHIFT) | |
| 45 | # define HPAGE_MASK (~(HPAGE_SIZE-1)) | |
| 46 | # define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT) | |
| 47 | /* | |
| 48 | * We define our own hugetlb_get_unmapped_area so we don't corrupt 2nd level | |
| 49 | * page tables with normal pages in them. | |
| 50 | */ | |
| 51 | # define HUGEPT_SHIFT (22) | |
| 52 | # define HUGEPT_ALIGN (1 << HUGEPT_SHIFT) | |
| 53 | # define HUGEPT_MASK (HUGEPT_ALIGN - 1) | |
| 54 | # define ALIGN_HUGEPT(x) ALIGN(x, HUGEPT_ALIGN) | |
| 55 | # define HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
| 56 | #endif | |
| 57 | ||
| 58 | #ifndef __ASSEMBLY__ | |
| 59 | ||
| 60 | /* On the Meta, we would like to know if the address (heap) we have is | |
| 61 | * in local or global space. | |
| 62 | */ | |
| 63 | #define is_global_space(addr) ((addr) > 0x7fffffff) | |
| 64 | #define is_local_space(addr) (!is_global_space(addr)) | |
| 65 | ||
| 66 | extern void clear_page(void *to); | |
| 67 | extern void copy_page(void *to, void *from); | |
| 68 | ||
| 69 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
| 70 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
| 71 | ||
| 72 | /* | |
| 73 | * These are used to make use of C type-checking.. | |
| 74 | */ | |
| 75 | typedef struct { unsigned long pte; } pte_t; | |
| 76 | typedef struct { unsigned long pgd; } pgd_t; | |
| 77 | typedef struct { unsigned long pgprot; } pgprot_t; | |
| 78 | typedef struct page *pgtable_t; | |
| 79 | ||
| 80 | #define pte_val(x) ((x).pte) | |
| 81 | #define pgd_val(x) ((x).pgd) | |
| 82 | #define pgprot_val(x) ((x).pgprot) | |
| 83 | ||
| 84 | #define __pte(x) ((pte_t) { (x) }) | |
| 85 | #define __pgd(x) ((pgd_t) { (x) }) | |
| 86 | #define __pgprot(x) ((pgprot_t) { (x) }) | |
| 87 | ||
| 88 | /* The kernel must now ALWAYS live at either 0xC0000000 or 0x40000000 - that | |
| 89 | * being either global or local space. | |
| 90 | */ | |
| 91 | #define PAGE_OFFSET (CONFIG_PAGE_OFFSET) | |
| 92 | ||
| 93 | #if PAGE_OFFSET >= LINGLOBAL_BASE | |
| 94 | #define META_MEMORY_BASE LINGLOBAL_BASE | |
| 95 | #define META_MEMORY_LIMIT LINGLOBAL_LIMIT | |
| 96 | #else | |
| 97 | #define META_MEMORY_BASE LINLOCAL_BASE | |
| 98 | #define META_MEMORY_LIMIT LINLOCAL_LIMIT | |
| 99 | #endif | |
| 100 | ||
| 101 | /* Offset between physical and virtual mapping of kernel memory. */ | |
| 102 | extern unsigned int meta_memoffset; | |
| 103 | ||
| 104 | #define __pa(x) ((unsigned long)(((unsigned long)(x)) - meta_memoffset)) | |
| 105 | #define __va(x) ((void *)((unsigned long)(((unsigned long)(x)) + meta_memoffset))) | |
| 106 | ||
| 107 | extern unsigned long pfn_base; | |
| 108 | #define ARCH_PFN_OFFSET (pfn_base) | |
| 109 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
| 110 | #define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT) | |
| 111 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
| 112 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) | |
| 113 | #ifdef CONFIG_FLATMEM | |
| 114 | extern unsigned long max_pfn; | |
| 115 | extern unsigned long min_low_pfn; | |
| 116 | #define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_pfn) | |
| 117 | #endif | |
| 118 | ||
| 119 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
| 120 | ||
| 121 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
| 122 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
| 123 | ||
| 124 | #include <asm-generic/memory_model.h> | |
| 125 | #include <asm-generic/getorder.h> | |
| 126 | ||
| 127 | #endif /* __ASSMEBLY__ */ | |
| 128 | ||
| 129 | #endif /* _METAG_PAGE_H */ |