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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _PARISC_PAGE_H #define _PARISC_PAGE_H #include <linux/const.h> #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) # define PAGE_SHIFT 12 #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB) # define PAGE_SHIFT 14 #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB) # define PAGE_SHIFT 16 #else # error "unknown default kernel page size" #endif #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA #ifndef __ASSEMBLY__ #include <asm/types.h> #include <asm/cache.h> #define clear_page(page) clear_page_asm((void *)(page)) #define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from)) struct page; struct vm_area_struct; void clear_page_asm(void *page); void copy_page_asm(void *to, void *from); #define clear_user_page(vto, vaddr, page) clear_page_asm(vto) void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr, struct vm_area_struct *vma); #define __HAVE_ARCH_COPY_USER_HIGHPAGE /* * These are used to make use of C type-checking.. */ #define STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ /* NOTE: even on 64 bits, these entries are __u32 because we allocate * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ typedef struct { __u32 pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #if CONFIG_PGTABLE_LEVELS == 3 typedef struct { __u32 pmd; } pmd_t; #define __pmd(x) ((pmd_t) { (x) } ) /* pXd_val() do not work as lvalues, so make sure we don't use them as such. */ #define pmd_val(x) ((x).pmd + 0) #endif #define pte_val(x) ((x).pte) #define pgd_val(x) ((x).pgd + 0) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) #else /* * .. while these make it easier on the compiler */ typedef unsigned long pte_t; #if CONFIG_PGTABLE_LEVELS == 3 typedef __u32 pmd_t; #define pmd_val(x) (x) #define __pmd(x) (x) #endif typedef __u32 pgd_t; typedef unsigned long pgprot_t; #define pte_val(x) (x) #define pgd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) #define __pgd(x) (x) #define __pgprot(x) (x) #endif /* STRICT_MM_TYPECHECKS */ #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) #if CONFIG_PGTABLE_LEVELS == 3 #define set_pud(pudptr, pudval) (*(pudptr) = (pudval)) #endif typedef struct page *pgtable_t; typedef struct __physmem_range { unsigned long start_pfn; unsigned long pages; /* PAGE_SIZE pages */ } physmem_range_t; extern physmem_range_t pmem_ranges[]; extern int npmem_ranges; #endif /* !__ASSEMBLY__ */ /* WARNING: The definitions below must match exactly to sizeof(pte_t) * etc */ #ifdef CONFIG_64BIT #define BITS_PER_PTE_ENTRY 3 #define BITS_PER_PMD_ENTRY 2 #define BITS_PER_PGD_ENTRY 2 #else #define BITS_PER_PTE_ENTRY 2 #define BITS_PER_PMD_ENTRY 2 #define BITS_PER_PGD_ENTRY 2 #endif #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) #define LINUX_GATEWAY_SPACE 0 /* This governs the relationship between virtual and physical addresses. * If you alter it, make sure to take care of our various fixed mapping * segments in fixmap.h */ #ifdef CONFIG_64BIT #define __PAGE_OFFSET_DEFAULT (0x40000000) /* 1GB */ #else #define __PAGE_OFFSET_DEFAULT (0x10000000) /* 256MB */ #endif #if defined(BOOTLOADER) #define __PAGE_OFFSET (0) /* bootloader uses physical addresses */ #else #define __PAGE_OFFSET __PAGE_OFFSET_DEFAULT #endif /* BOOTLOADER */ #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) /* The size of the gateway page (we leave lots of room for expansion) */ #define GATEWAY_PAGE_SIZE 0x4000 /* The start of the actual kernel binary---used in vmlinux.lds.S * Leave some space after __PAGE_OFFSET for detecting kernel null * ptr derefs */ #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) /* These macros don't work for 64-bit C code -- don't allow in C at all */ #ifdef __ASSEMBLY__ # define PA(x) ((x)-__PAGE_OFFSET) # define VA(x) ((x)+__PAGE_OFFSET) #endif #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) #ifdef CONFIG_HUGETLB_PAGE #define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */ #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) # define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */ # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M #elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) # define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */ # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M #else # define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */ # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M #endif #endif /* CONFIG_HUGETLB_PAGE */ #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> #include <asm/pdc.h> #define PAGE0 ((struct zeropage *)absolute_pointer(__PAGE_OFFSET)) /* DEFINITION OF THE ZERO-PAGE (PAG0) */ /* based on work by Jason Eckhardt (jason@equator.com) */ #endif /* _PARISC_PAGE_H */ |