1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _PARISC_PAGE_H 3 #define _PARISC_PAGE_H 4 5 #include <linux/const.h> 6 7 #define PAGE_SHIFT CONFIG_PAGE_SHIFT 8 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 9 #define PAGE_MASK (~(PAGE_SIZE-1)) 10 11 12 #ifndef __ASSEMBLY__ 13 14 #include <asm/types.h> 15 #include <asm/cache.h> 16 17 #define clear_page(page) clear_page_asm((void *)(page)) 18 #define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from)) 19 20 struct page; 21 struct vm_area_struct; 22 23 void clear_page_asm(void *page); 24 void copy_page_asm(void *to, void *from); 25 #define clear_user_page(vto, vaddr, page) clear_page_asm(vto) 26 void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr, 27 struct vm_area_struct *vma); 28 #define __HAVE_ARCH_COPY_USER_HIGHPAGE 29 30 /* 31 * These are used to make use of C type-checking.. 32 */ 33 #define STRICT_MM_TYPECHECKS 34 #ifdef STRICT_MM_TYPECHECKS 35 typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ 36 37 /* NOTE: even on 64 bits, these entries are __u32 because we allocate 38 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ 39 typedef struct { __u32 pgd; } pgd_t; 40 typedef struct { unsigned long pgprot; } pgprot_t; 41 42 #if CONFIG_PGTABLE_LEVELS == 3 43 typedef struct { __u32 pmd; } pmd_t; 44 #define __pmd(x) ((pmd_t) { (x) } ) 45 /* pXd_val() do not work as lvalues, so make sure we don't use them as such. */ 46 #define pmd_val(x) ((x).pmd + 0) 47 #endif 48 49 #define pte_val(x) ((x).pte) 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 __pgd(x) ((pgd_t) { (x) } ) 55 #define __pgprot(x) ((pgprot_t) { (x) } ) 56 57 #else 58 /* 59 * .. while these make it easier on the compiler 60 */ 61 typedef unsigned long pte_t; 62 63 #if CONFIG_PGTABLE_LEVELS == 3 64 typedef __u32 pmd_t; 65 #define pmd_val(x) (x) 66 #define __pmd(x) (x) 67 #endif 68 69 typedef __u32 pgd_t; 70 typedef unsigned long pgprot_t; 71 72 #define pte_val(x) (x) 73 #define pgd_val(x) (x) 74 #define pgprot_val(x) (x) 75 76 #define __pte(x) (x) 77 #define __pgd(x) (x) 78 #define __pgprot(x) (x) 79 80 #endif /* STRICT_MM_TYPECHECKS */ 81 82 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) 83 #if CONFIG_PGTABLE_LEVELS == 3 84 #define set_pud(pudptr, pudval) (*(pudptr) = (pudval)) 85 #endif 86 87 typedef struct page *pgtable_t; 88 89 typedef struct __physmem_range { 90 unsigned long start_pfn; 91 unsigned long pages; /* PAGE_SIZE pages */ 92 } physmem_range_t; 93 94 extern physmem_range_t pmem_ranges[]; 95 extern int npmem_ranges; 96 97 #endif /* !__ASSEMBLY__ */ 98 99 /* WARNING: The definitions below must match exactly to sizeof(pte_t) 100 * etc 101 */ 102 #ifdef CONFIG_64BIT 103 #define BITS_PER_PTE_ENTRY 3 104 #define BITS_PER_PMD_ENTRY 2 105 #define BITS_PER_PGD_ENTRY 2 106 #else 107 #define BITS_PER_PTE_ENTRY 2 108 #define BITS_PER_PMD_ENTRY 2 109 #define BITS_PER_PGD_ENTRY 2 110 #endif 111 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) 112 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) 113 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) 114 115 #define LINUX_GATEWAY_SPACE 0 116 117 /* This governs the relationship between virtual and physical addresses. 118 * If you alter it, make sure to take care of our various fixed mapping 119 * segments in fixmap.h */ 120 #ifdef CONFIG_64BIT 121 #define __PAGE_OFFSET_DEFAULT (0x40000000) /* 1GB */ 122 #else 123 #define __PAGE_OFFSET_DEFAULT (0x10000000) /* 256MB */ 124 #endif 125 126 #if defined(BOOTLOADER) 127 #define __PAGE_OFFSET (0) /* bootloader uses physical addresses */ 128 #else 129 #define __PAGE_OFFSET __PAGE_OFFSET_DEFAULT 130 #endif /* BOOTLOADER */ 131 132 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 133 134 /* The size of the gateway page (we leave lots of room for expansion) */ 135 #define GATEWAY_PAGE_SIZE 0x4000 136 137 /* The start of the actual kernel binary---used in vmlinux.lds.S 138 * Leave some space after __PAGE_OFFSET for detecting kernel null 139 * ptr derefs */ 140 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) 141 142 /* These macros don't work for 64-bit C code -- don't allow in C at all */ 143 #ifdef __ASSEMBLY__ 144 # define PA(x) ((x)-__PAGE_OFFSET) 145 # define VA(x) ((x)+__PAGE_OFFSET) 146 #endif 147 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) 148 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 149 150 #ifdef CONFIG_HUGETLB_PAGE 151 #define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */ 152 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) 153 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 154 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 155 156 #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) 157 # define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */ 158 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M 159 #elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) 160 # define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */ 161 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M 162 #else 163 # define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */ 164 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M 165 #endif 166 #endif /* CONFIG_HUGETLB_PAGE */ 167 168 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 169 170 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 171 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 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 *)absolute_pointer(__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