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 #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) 8 # define PAGE_SHIFT 12 9 #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB) 10 # define PAGE_SHIFT 14 11 #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB) 12 # define PAGE_SHIFT 16 13 #else 14 # error "unknown default kernel page size" 15 #endif 16 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 17 #define PAGE_MASK (~(PAGE_SIZE-1)) 18 19 20 #ifndef __ASSEMBLY__ 21 22 #include <asm/types.h> 23 #include <asm/cache.h> 24 25 #define clear_page(page) clear_page_asm((void *)(page)) 26 #define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from)) 27 28 struct page; 29 struct vm_area_struct; 30 31 void clear_page_asm(void *page); 32 void copy_page_asm(void *to, void *from); 33 #define clear_user_page(vto, vaddr, page) clear_page_asm(vto) 34 void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr, 35 struct vm_area_struct *vma); 36 #define __HAVE_ARCH_COPY_USER_HIGHPAGE 37 38 /* 39 * These are used to make use of C type-checking.. 40 */ 41 #define STRICT_MM_TYPECHECKS 42 #ifdef STRICT_MM_TYPECHECKS 43 typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ 44 45 /* NOTE: even on 64 bits, these entries are __u32 because we allocate 46 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ 47 typedef struct { __u32 pgd; } pgd_t; 48 typedef struct { unsigned long pgprot; } pgprot_t; 49 50 #if CONFIG_PGTABLE_LEVELS == 3 51 typedef struct { __u32 pmd; } pmd_t; 52 #define __pmd(x) ((pmd_t) { (x) } ) 53 /* pXd_val() do not work as lvalues, so make sure we don't use them as such. */ 54 #define pmd_val(x) ((x).pmd + 0) 55 #endif 56 57 #define pte_val(x) ((x).pte) 58 #define pgd_val(x) ((x).pgd + 0) 59 #define pgprot_val(x) ((x).pgprot) 60 61 #define __pte(x) ((pte_t) { (x) } ) 62 #define __pgd(x) ((pgd_t) { (x) } ) 63 #define __pgprot(x) ((pgprot_t) { (x) } ) 64 65 #else 66 /* 67 * .. while these make it easier on the compiler 68 */ 69 typedef unsigned long pte_t; 70 71 #if CONFIG_PGTABLE_LEVELS == 3 72 typedef __u32 pmd_t; 73 #define pmd_val(x) (x) 74 #define __pmd(x) (x) 75 #endif 76 77 typedef __u32 pgd_t; 78 typedef unsigned long pgprot_t; 79 80 #define pte_val(x) (x) 81 #define pgd_val(x) (x) 82 #define pgprot_val(x) (x) 83 84 #define __pte(x) (x) 85 #define __pgd(x) (x) 86 #define __pgprot(x) (x) 87 88 #endif /* STRICT_MM_TYPECHECKS */ 89 90 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) 91 #if CONFIG_PGTABLE_LEVELS == 3 92 #define set_pud(pudptr, pudval) (*(pudptr) = (pudval)) 93 #endif 94 95 typedef struct page *pgtable_t; 96 97 typedef struct __physmem_range { 98 unsigned long start_pfn; 99 unsigned long pages; /* PAGE_SIZE pages */ 100 } physmem_range_t; 101 102 extern physmem_range_t pmem_ranges[]; 103 extern int npmem_ranges; 104 105 #endif /* !__ASSEMBLY__ */ 106 107 /* WARNING: The definitions below must match exactly to sizeof(pte_t) 108 * etc 109 */ 110 #ifdef CONFIG_64BIT 111 #define BITS_PER_PTE_ENTRY 3 112 #define BITS_PER_PMD_ENTRY 2 113 #define BITS_PER_PGD_ENTRY 2 114 #else 115 #define BITS_PER_PTE_ENTRY 2 116 #define BITS_PER_PMD_ENTRY 2 117 #define BITS_PER_PGD_ENTRY 2 118 #endif 119 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) 120 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) 121 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) 122 123 #define LINUX_GATEWAY_SPACE 0 124 125 /* This governs the relationship between virtual and physical addresses. 126 * If you alter it, make sure to take care of our various fixed mapping 127 * segments in fixmap.h */ 128 #ifdef CONFIG_64BIT 129 #define __PAGE_OFFSET_DEFAULT (0x40000000) /* 1GB */ 130 #else 131 #define __PAGE_OFFSET_DEFAULT (0x10000000) /* 256MB */ 132 #endif 133 134 #if defined(BOOTLOADER) 135 #define __PAGE_OFFSET (0) /* bootloader uses physical addresses */ 136 #else 137 #define __PAGE_OFFSET __PAGE_OFFSET_DEFAULT 138 #endif /* BOOTLOADER */ 139 140 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 141 142 /* The size of the gateway page (we leave lots of room for expansion) */ 143 #define GATEWAY_PAGE_SIZE 0x4000 144 145 /* The start of the actual kernel binary---used in vmlinux.lds.S 146 * Leave some space after __PAGE_OFFSET for detecting kernel null 147 * ptr derefs */ 148 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) 149 150 /* These macros don't work for 64-bit C code -- don't allow in C at all */ 151 #ifdef __ASSEMBLY__ 152 # define PA(x) ((x)-__PAGE_OFFSET) 153 # define VA(x) ((x)+__PAGE_OFFSET) 154 #endif 155 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) 156 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 157 158 #ifndef CONFIG_SPARSEMEM 159 #define pfn_valid(pfn) ((pfn) < max_mapnr) 160 #endif 161 162 #ifdef CONFIG_HUGETLB_PAGE 163 #define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */ 164 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) 165 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 166 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 167 168 #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) 169 # define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */ 170 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M 171 #elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) 172 # define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */ 173 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M 174 #else 175 # define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */ 176 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M 177 #endif 178 #endif /* CONFIG_HUGETLB_PAGE */ 179 180 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 181 182 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 183 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 184 185 #include <asm-generic/memory_model.h> 186 #include <asm-generic/getorder.h> 187 #include <asm/pdc.h> 188 189 #define PAGE0 ((struct zeropage *)absolute_pointer(__PAGE_OFFSET)) 190 191 /* DEFINITION OF THE ZERO-PAGE (PAG0) */ 192 /* based on work by Jason Eckhardt (jason@equator.com) */ 193 194 #endif /* _PARISC_PAGE_H */ 195