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