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 void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, 33 struct page *pg); 34 35 /* 36 * These are used to make use of C type-checking.. 37 */ 38 #define STRICT_MM_TYPECHECKS 39 #ifdef STRICT_MM_TYPECHECKS 40 typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ 41 42 /* NOTE: even on 64 bits, these entries are __u32 because we allocate 43 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ 44 typedef struct { __u32 pmd; } pmd_t; 45 typedef struct { __u32 pgd; } pgd_t; 46 typedef struct { unsigned long pgprot; } pgprot_t; 47 48 #define pte_val(x) ((x).pte) 49 /* These do not work lvalues, so make sure we don't use them as such. */ 50 #define pmd_val(x) ((x).pmd + 0) 51 #define pgd_val(x) ((x).pgd + 0) 52 #define pgprot_val(x) ((x).pgprot) 53 54 #define __pte(x) ((pte_t) { (x) } ) 55 #define __pmd(x) ((pmd_t) { (x) } ) 56 #define __pgd(x) ((pgd_t) { (x) } ) 57 #define __pgprot(x) ((pgprot_t) { (x) } ) 58 59 #define __pmd_val_set(x,n) (x).pmd = (n) 60 #define __pgd_val_set(x,n) (x).pgd = (n) 61 62 #else 63 /* 64 * .. while these make it easier on the compiler 65 */ 66 typedef unsigned long pte_t; 67 typedef __u32 pmd_t; 68 typedef __u32 pgd_t; 69 typedef unsigned long pgprot_t; 70 71 #define pte_val(x) (x) 72 #define pmd_val(x) (x) 73 #define pgd_val(x) (x) 74 #define pgprot_val(x) (x) 75 76 #define __pte(x) (x) 77 #define __pmd(x) (x) 78 #define __pgd(x) (x) 79 #define __pgprot(x) (x) 80 81 #define __pmd_val_set(x,n) (x) = (n) 82 #define __pgd_val_set(x,n) (x) = (n) 83 84 #endif /* STRICT_MM_TYPECHECKS */ 85 86 typedef struct page *pgtable_t; 87 88 typedef struct __physmem_range { 89 unsigned long start_pfn; 90 unsigned long pages; /* PAGE_SIZE pages */ 91 } physmem_range_t; 92 93 extern physmem_range_t pmem_ranges[]; 94 extern int npmem_ranges; 95 96 #endif /* !__ASSEMBLY__ */ 97 98 /* WARNING: The definitions below must match exactly to sizeof(pte_t) 99 * etc 100 */ 101 #ifdef CONFIG_64BIT 102 #define BITS_PER_PTE_ENTRY 3 103 #define BITS_PER_PMD_ENTRY 2 104 #define BITS_PER_PGD_ENTRY 2 105 #else 106 #define BITS_PER_PTE_ENTRY 2 107 #define BITS_PER_PMD_ENTRY 2 108 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY 109 #endif 110 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) 111 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) 112 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) 113 114 #define LINUX_GATEWAY_SPACE 0 115 116 /* This governs the relationship between virtual and physical addresses. 117 * If you alter it, make sure to take care of our various fixed mapping 118 * segments in fixmap.h */ 119 #ifdef CONFIG_64BIT 120 #define __PAGE_OFFSET (0x40000000) /* 1GB */ 121 #else 122 #define __PAGE_OFFSET (0x10000000) /* 256MB */ 123 #endif 124 125 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 126 127 /* The size of the gateway page (we leave lots of room for expansion) */ 128 #define GATEWAY_PAGE_SIZE 0x4000 129 130 /* The start of the actual kernel binary---used in vmlinux.lds.S 131 * Leave some space after __PAGE_OFFSET for detecting kernel null 132 * ptr derefs */ 133 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) 134 135 /* These macros don't work for 64-bit C code -- don't allow in C at all */ 136 #ifdef __ASSEMBLY__ 137 # define PA(x) ((x)-__PAGE_OFFSET) 138 # define VA(x) ((x)+__PAGE_OFFSET) 139 #endif 140 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) 141 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 142 143 #ifndef CONFIG_DISCONTIGMEM 144 #define pfn_valid(pfn) ((pfn) < max_mapnr) 145 #endif /* CONFIG_DISCONTIGMEM */ 146 147 #ifdef CONFIG_HUGETLB_PAGE 148 #define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */ 149 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) 150 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 151 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 152 153 #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) 154 # define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */ 155 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M 156 #elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) 157 # define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */ 158 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M 159 #else 160 # define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */ 161 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M 162 #endif 163 #endif /* CONFIG_HUGETLB_PAGE */ 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