1 #ifndef _PARISC_PAGE_H 2 #define _PARISC_PAGE_H 3 4 #include <linux/const.h> 5 6 #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) 7 # define PAGE_SHIFT 12 8 #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB) 9 # define PAGE_SHIFT 14 10 #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB) 11 # define PAGE_SHIFT 16 12 #else 13 # error "unknown default kernel page size" 14 #endif 15 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 16 #define PAGE_MASK (~(PAGE_SIZE-1)) 17 18 19 #ifndef __ASSEMBLY__ 20 21 #include <asm/types.h> 22 #include <asm/cache.h> 23 24 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 25 #define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from)) 26 27 struct page; 28 29 void copy_user_page_asm(void *to, void *from); 30 void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, 31 struct page *pg); 32 void clear_user_page(void *page, unsigned long vaddr, struct page *pg); 33 34 /* 35 * These are used to make use of C type-checking.. 36 */ 37 #define STRICT_MM_TYPECHECKS 38 #ifdef STRICT_MM_TYPECHECKS 39 typedef struct { unsigned long pte; 40 #if !defined(CONFIG_64BIT) 41 unsigned long future_flags; 42 /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY 43 to 2, but then strangely the identical 32bit kernel boots on a 44 c3000(pa20), but not any longer on a 715(pa11). 45 Still investigating... HelgeD. 46 */ 47 #endif 48 } pte_t; /* either 32 or 64bit */ 49 50 /* NOTE: even on 64 bits, these entries are __u32 because we allocate 51 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ 52 typedef struct { __u32 pmd; } pmd_t; 53 typedef struct { __u32 pgd; } pgd_t; 54 typedef struct { unsigned long pgprot; } pgprot_t; 55 56 #define pte_val(x) ((x).pte) 57 /* These do not work lvalues, so make sure we don't use them as such. */ 58 #define pmd_val(x) ((x).pmd + 0) 59 #define pgd_val(x) ((x).pgd + 0) 60 #define pgprot_val(x) ((x).pgprot) 61 62 #define __pte(x) ((pte_t) { (x) } ) 63 #define __pmd(x) ((pmd_t) { (x) } ) 64 #define __pgd(x) ((pgd_t) { (x) } ) 65 #define __pgprot(x) ((pgprot_t) { (x) } ) 66 67 #define __pmd_val_set(x,n) (x).pmd = (n) 68 #define __pgd_val_set(x,n) (x).pgd = (n) 69 70 #else 71 /* 72 * .. while these make it easier on the compiler 73 */ 74 typedef unsigned long pte_t; 75 typedef __u32 pmd_t; 76 typedef __u32 pgd_t; 77 typedef unsigned long pgprot_t; 78 79 #define pte_val(x) (x) 80 #define pmd_val(x) (x) 81 #define pgd_val(x) (x) 82 #define pgprot_val(x) (x) 83 84 #define __pte(x) (x) 85 #define __pmd(x) (x) 86 #define __pgd(x) (x) 87 #define __pgprot(x) (x) 88 89 #define __pmd_val_set(x,n) (x) = (n) 90 #define __pgd_val_set(x,n) (x) = (n) 91 92 #endif /* STRICT_MM_TYPECHECKS */ 93 94 typedef struct page *pgtable_t; 95 96 typedef struct __physmem_range { 97 unsigned long start_pfn; 98 unsigned long pages; /* PAGE_SIZE pages */ 99 } physmem_range_t; 100 101 extern physmem_range_t pmem_ranges[]; 102 extern int npmem_ranges; 103 104 #endif /* !__ASSEMBLY__ */ 105 106 /* WARNING: The definitions below must match exactly to sizeof(pte_t) 107 * etc 108 */ 109 #ifdef CONFIG_64BIT 110 #define BITS_PER_PTE_ENTRY 3 111 #define BITS_PER_PMD_ENTRY 2 112 #define BITS_PER_PGD_ENTRY 2 113 #else 114 #define BITS_PER_PTE_ENTRY 3 115 #define BITS_PER_PMD_ENTRY 2 116 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY 117 #endif 118 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) 119 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) 120 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) 121 122 #define LINUX_GATEWAY_SPACE 0 123 124 /* This governs the relationship between virtual and physical addresses. 125 * If you alter it, make sure to take care of our various fixed mapping 126 * segments in fixmap.h */ 127 #ifdef CONFIG_64BIT 128 #define __PAGE_OFFSET (0x40000000) /* 1GB */ 129 #else 130 #define __PAGE_OFFSET (0x10000000) /* 256MB */ 131 #endif 132 133 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 134 135 /* The size of the gateway page (we leave lots of room for expansion) */ 136 #define GATEWAY_PAGE_SIZE 0x4000 137 138 /* The start of the actual kernel binary---used in vmlinux.lds.S 139 * Leave some space after __PAGE_OFFSET for detecting kernel null 140 * ptr derefs */ 141 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) 142 143 /* These macros don't work for 64-bit C code -- don't allow in C at all */ 144 #ifdef __ASSEMBLY__ 145 # define PA(x) ((x)-__PAGE_OFFSET) 146 # define VA(x) ((x)+__PAGE_OFFSET) 147 #endif 148 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) 149 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 150 151 #ifndef CONFIG_DISCONTIGMEM 152 #define pfn_valid(pfn) ((pfn) < max_mapnr) 153 #endif /* CONFIG_DISCONTIGMEM */ 154 155 #ifdef CONFIG_HUGETLB_PAGE 156 #define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */ 157 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) 158 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 159 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 160 #endif 161 162 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 163 164 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 165 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 166 167 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 168 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 169 170 #include <asm-generic/memory_model.h> 171 #include <asm-generic/page.h> 172 173 #endif /* _PARISC_PAGE_H */ 174