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