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) clear_page_asm((void *)(page)) 25 #define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from)) 26 27 struct page; 28 29 void clear_page_asm(void *page); 30 void copy_page_asm(void *to, void *from); 31 void clear_user_page(void *vto, unsigned long vaddr, struct page *pg); 32 void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, 33 struct page *pg); 34 35 /* #define CONFIG_PARISC_TMPALIAS */ 36 37 #ifdef CONFIG_PARISC_TMPALIAS 38 void clear_user_highpage(struct page *page, unsigned long vaddr); 39 #define clear_user_highpage clear_user_highpage 40 struct vm_area_struct; 41 void copy_user_highpage(struct page *to, struct page *from, 42 unsigned long vaddr, struct vm_area_struct *vma); 43 #define __HAVE_ARCH_COPY_USER_HIGHPAGE 44 #endif 45 46 /* 47 * These are used to make use of C type-checking.. 48 */ 49 #define STRICT_MM_TYPECHECKS 50 #ifdef STRICT_MM_TYPECHECKS 51 typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ 52 53 /* NOTE: even on 64 bits, these entries are __u32 because we allocate 54 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ 55 typedef struct { __u32 pmd; } pmd_t; 56 typedef struct { __u32 pgd; } pgd_t; 57 typedef struct { unsigned long pgprot; } pgprot_t; 58 59 #define pte_val(x) ((x).pte) 60 /* These do not work lvalues, so make sure we don't use them as such. */ 61 #define pmd_val(x) ((x).pmd + 0) 62 #define pgd_val(x) ((x).pgd + 0) 63 #define pgprot_val(x) ((x).pgprot) 64 65 #define __pte(x) ((pte_t) { (x) } ) 66 #define __pmd(x) ((pmd_t) { (x) } ) 67 #define __pgd(x) ((pgd_t) { (x) } ) 68 #define __pgprot(x) ((pgprot_t) { (x) } ) 69 70 #define __pmd_val_set(x,n) (x).pmd = (n) 71 #define __pgd_val_set(x,n) (x).pgd = (n) 72 73 #else 74 /* 75 * .. while these make it easier on the compiler 76 */ 77 typedef unsigned long pte_t; 78 typedef __u32 pmd_t; 79 typedef __u32 pgd_t; 80 typedef unsigned long pgprot_t; 81 82 #define pte_val(x) (x) 83 #define pmd_val(x) (x) 84 #define pgd_val(x) (x) 85 #define pgprot_val(x) (x) 86 87 #define __pte(x) (x) 88 #define __pmd(x) (x) 89 #define __pgd(x) (x) 90 #define __pgprot(x) (x) 91 92 #define __pmd_val_set(x,n) (x) = (n) 93 #define __pgd_val_set(x,n) (x) = (n) 94 95 #endif /* STRICT_MM_TYPECHECKS */ 96 97 typedef struct page *pgtable_t; 98 99 typedef struct __physmem_range { 100 unsigned long start_pfn; 101 unsigned long pages; /* PAGE_SIZE pages */ 102 } physmem_range_t; 103 104 extern physmem_range_t pmem_ranges[]; 105 extern int npmem_ranges; 106 107 #endif /* !__ASSEMBLY__ */ 108 109 /* WARNING: The definitions below must match exactly to sizeof(pte_t) 110 * etc 111 */ 112 #ifdef CONFIG_64BIT 113 #define BITS_PER_PTE_ENTRY 3 114 #define BITS_PER_PMD_ENTRY 2 115 #define BITS_PER_PGD_ENTRY 2 116 #else 117 #define BITS_PER_PTE_ENTRY 2 118 #define BITS_PER_PMD_ENTRY 2 119 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY 120 #endif 121 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) 122 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) 123 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) 124 125 #define LINUX_GATEWAY_SPACE 0 126 127 /* This governs the relationship between virtual and physical addresses. 128 * If you alter it, make sure to take care of our various fixed mapping 129 * segments in fixmap.h */ 130 #ifdef CONFIG_64BIT 131 #define __PAGE_OFFSET (0x40000000) /* 1GB */ 132 #else 133 #define __PAGE_OFFSET (0x10000000) /* 256MB */ 134 #endif 135 136 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 137 138 /* The size of the gateway page (we leave lots of room for expansion) */ 139 #define GATEWAY_PAGE_SIZE 0x4000 140 141 /* The start of the actual kernel binary---used in vmlinux.lds.S 142 * Leave some space after __PAGE_OFFSET for detecting kernel null 143 * ptr derefs */ 144 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) 145 146 /* These macros don't work for 64-bit C code -- don't allow in C at all */ 147 #ifdef __ASSEMBLY__ 148 # define PA(x) ((x)-__PAGE_OFFSET) 149 # define VA(x) ((x)+__PAGE_OFFSET) 150 #endif 151 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) 152 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 153 154 #ifndef CONFIG_DISCONTIGMEM 155 #define pfn_valid(pfn) ((pfn) < max_mapnr) 156 #endif /* CONFIG_DISCONTIGMEM */ 157 158 #ifdef CONFIG_HUGETLB_PAGE 159 #define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */ 160 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) 161 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 162 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 163 #endif 164 165 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 166 167 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 168 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 169 170 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 171 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 172 173 #include <asm-generic/memory_model.h> 174 #include <asm-generic/getorder.h> 175 #include <asm/pdc.h> 176 177 #define PAGE0 ((struct zeropage *)__PAGE_OFFSET) 178 179 /* DEFINITION OF THE ZERO-PAGE (PAG0) */ 180 /* based on work by Jason Eckhardt (jason@equator.com) */ 181 182 #endif /* _PARISC_PAGE_H */ 183