1#ifndef _PARISC_PAGE_H 2#define _PARISC_PAGE_H 3 4#include <linux/const.h> 5 6#if defined(CONFIG_PARISC_PAGE_SIZE_4KB) 7# define PAGE_SHIFT 12 8#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB) 9# define PAGE_SHIFT 14 10#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB) 11# define PAGE_SHIFT 16 12#else 13# error "unknown default kernel page size" 14#endif 15#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 16#define PAGE_MASK (~(PAGE_SIZE-1)) 17 18 19#ifndef __ASSEMBLY__ 20 21#include <asm/types.h> 22#include <asm/cache.h> 23 24#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 25#define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from)) 26 27struct page; 28 29void copy_user_page_asm(void *to, void *from); 30void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, 31 struct page *pg); 32void clear_user_page(void *page, unsigned long vaddr, struct page *pg); 33 34/* 35 * These are used to make use of C type-checking.. 36 */ 37#define STRICT_MM_TYPECHECKS 38#ifdef STRICT_MM_TYPECHECKS 39typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ 40 41/* NOTE: even on 64 bits, these entries are __u32 because we allocate 42 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ 43typedef struct { __u32 pmd; } pmd_t; 44typedef struct { __u32 pgd; } pgd_t; 45typedef struct { unsigned long pgprot; } pgprot_t; 46 47#define pte_val(x) ((x).pte) 48/* These do not work lvalues, so make sure we don't use them as such. */ 49#define pmd_val(x) ((x).pmd + 0) 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 __pmd(x) ((pmd_t) { (x) } ) 55#define __pgd(x) ((pgd_t) { (x) } ) 56#define __pgprot(x) ((pgprot_t) { (x) } ) 57 58#define __pmd_val_set(x,n) (x).pmd = (n) 59#define __pgd_val_set(x,n) (x).pgd = (n) 60 61#else 62/* 63 * .. while these make it easier on the compiler 64 */ 65typedef unsigned long pte_t; 66typedef __u32 pmd_t; 67typedef __u32 pgd_t; 68typedef unsigned long pgprot_t; 69 70#define pte_val(x) (x) 71#define pmd_val(x) (x) 72#define pgd_val(x) (x) 73#define pgprot_val(x) (x) 74 75#define __pte(x) (x) 76#define __pmd(x) (x) 77#define __pgd(x) (x) 78#define __pgprot(x) (x) 79 80#define __pmd_val_set(x,n) (x) = (n) 81#define __pgd_val_set(x,n) (x) = (n) 82 83#endif /* STRICT_MM_TYPECHECKS */ 84 85typedef struct page *pgtable_t; 86 87typedef struct __physmem_range { 88 unsigned long start_pfn; 89 unsigned long pages; /* PAGE_SIZE pages */ 90} physmem_range_t; 91 92extern physmem_range_t pmem_ranges[]; 93extern int npmem_ranges; 94 95#endif /* !__ASSEMBLY__ */ 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 BITS_PER_PMD_ENTRY 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 (0x40000000) /* 1GB */ 120#else 121#define __PAGE_OFFSET (0x10000000) /* 256MB */ 122#endif 123 124#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 125 126/* The size of the gateway page (we leave lots of room for expansion) */ 127#define GATEWAY_PAGE_SIZE 0x4000 128 129/* The start of the actual kernel binary---used in vmlinux.lds.S 130 * Leave some space after __PAGE_OFFSET for detecting kernel null 131 * ptr derefs */ 132#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) 133 134/* These macros don't work for 64-bit C code -- don't allow in C at all */ 135#ifdef __ASSEMBLY__ 136# define PA(x) ((x)-__PAGE_OFFSET) 137# define VA(x) ((x)+__PAGE_OFFSET) 138#endif 139#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) 140#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 141 142#ifndef CONFIG_DISCONTIGMEM 143#define pfn_valid(pfn) ((pfn) < max_mapnr) 144#endif /* CONFIG_DISCONTIGMEM */ 145 146#ifdef CONFIG_HUGETLB_PAGE 147#define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */ 148#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) 149#define HPAGE_MASK (~(HPAGE_SIZE - 1)) 150#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 151#endif 152 153#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 154 155#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 156#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 157 158#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 159 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 160 161#include <asm-generic/memory_model.h> 162#include <asm-generic/getorder.h> 163 164#endif /* _PARISC_PAGE_H */ 165