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; } pte_t; /* either 32 or 64bit */ 40 41 /* NOTE: even on 64 bits, these entries are __u32 because we allocate 42 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ 43 typedef struct { __u32 pmd; } pmd_t; 44 typedef struct { __u32 pgd; } pgd_t; 45 typedef struct { unsigned long pgprot; } pgprot_t; 46 47 #define pte_val(x) ((x).pte) 48 /* These do not work lvalues, so make sure we don't use them as such. */ 49 #define pmd_val(x) ((x).pmd + 0) 50 #define pgd_val(x) ((x).pgd + 0) 51 #define pgprot_val(x) ((x).pgprot) 52 53 #define __pte(x) ((pte_t) { (x) } ) 54 #define __pmd(x) ((pmd_t) { (x) } ) 55 #define __pgd(x) ((pgd_t) { (x) } ) 56 #define __pgprot(x) ((pgprot_t) { (x) } ) 57 58 #define __pmd_val_set(x,n) (x).pmd = (n) 59 #define __pgd_val_set(x,n) (x).pgd = (n) 60 61 #else 62 /* 63 * .. while these make it easier on the compiler 64 */ 65 typedef unsigned long pte_t; 66 typedef __u32 pmd_t; 67 typedef __u32 pgd_t; 68 typedef unsigned long pgprot_t; 69 70 #define pte_val(x) (x) 71 #define pmd_val(x) (x) 72 #define pgd_val(x) (x) 73 #define pgprot_val(x) (x) 74 75 #define __pte(x) (x) 76 #define __pmd(x) (x) 77 #define __pgd(x) (x) 78 #define __pgprot(x) (x) 79 80 #define __pmd_val_set(x,n) (x) = (n) 81 #define __pgd_val_set(x,n) (x) = (n) 82 83 #endif /* STRICT_MM_TYPECHECKS */ 84 85 typedef struct page *pgtable_t; 86 87 typedef struct __physmem_range { 88 unsigned long start_pfn; 89 unsigned long pages; /* PAGE_SIZE pages */ 90 } physmem_range_t; 91 92 extern physmem_range_t pmem_ranges[]; 93 extern int npmem_ranges; 94 95 #endif /* !__ASSEMBLY__ */ 96 97 /* WARNING: The definitions below must match exactly to sizeof(pte_t) 98 * etc 99 */ 100 #ifdef CONFIG_64BIT 101 #define BITS_PER_PTE_ENTRY 3 102 #define BITS_PER_PMD_ENTRY 2 103 #define BITS_PER_PGD_ENTRY 2 104 #else 105 #define BITS_PER_PTE_ENTRY 2 106 #define BITS_PER_PMD_ENTRY 2 107 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY 108 #endif 109 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) 110 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) 111 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) 112 113 #define LINUX_GATEWAY_SPACE 0 114 115 /* This governs the relationship between virtual and physical addresses. 116 * If you alter it, make sure to take care of our various fixed mapping 117 * segments in fixmap.h */ 118 #ifdef CONFIG_64BIT 119 #define __PAGE_OFFSET (0x40000000) /* 1GB */ 120 #else 121 #define __PAGE_OFFSET (0x10000000) /* 256MB */ 122 #endif 123 124 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 125 126 /* The size of the gateway page (we leave lots of room for expansion) */ 127 #define GATEWAY_PAGE_SIZE 0x4000 128 129 /* The start of the actual kernel binary---used in vmlinux.lds.S 130 * Leave some space after __PAGE_OFFSET for detecting kernel null 131 * ptr derefs */ 132 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) 133 134 /* These macros don't work for 64-bit C code -- don't allow in C at all */ 135 #ifdef __ASSEMBLY__ 136 # define PA(x) ((x)-__PAGE_OFFSET) 137 # define VA(x) ((x)+__PAGE_OFFSET) 138 #endif 139 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) 140 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 141 142 #ifndef CONFIG_DISCONTIGMEM 143 #define pfn_valid(pfn) ((pfn) < max_mapnr) 144 #endif /* CONFIG_DISCONTIGMEM */ 145 146 #ifdef CONFIG_HUGETLB_PAGE 147 #define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */ 148 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) 149 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 150 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 151 #endif 152 153 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 154 155 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 156 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 157 158 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 159 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 160 161 #include <asm-generic/memory_model.h> 162 #include <asm-generic/getorder.h> 163 #include <asm/pdc.h> 164 165 #define PAGE0 ((struct zeropage *)__PAGE_OFFSET) 166 167 /* DEFINITION OF THE ZERO-PAGE (PAG0) */ 168 /* based on work by Jason Eckhardt (jason@equator.com) */ 169 170 #endif /* _PARISC_PAGE_H */ 171