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