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 20struct page; 21struct vm_area_struct; 22 23void clear_page_asm(void *page); 24void copy_page_asm(void *to, void *from); 25#define clear_user_page(vto, vaddr, page) clear_page_asm(vto) 26void 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 35typedef 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) */ 39typedef struct { __u32 pgd; } pgd_t; 40typedef struct { unsigned long pgprot; } pgprot_t; 41 42#if CONFIG_PGTABLE_LEVELS == 3 43typedef 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 */ 61typedef unsigned long pte_t; 62 63#if CONFIG_PGTABLE_LEVELS == 3 64typedef __u32 pmd_t; 65#define pmd_val(x) (x) 66#define __pmd(x) (x) 67#endif 68 69typedef __u32 pgd_t; 70typedef 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 87typedef struct page *pgtable_t; 88 89typedef struct __physmem_range { 90 unsigned long start_pfn; 91 unsigned long pages; /* PAGE_SIZE pages */ 92} physmem_range_t; 93 94extern physmem_range_t pmem_ranges[]; 95extern 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