1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com) 4*4882a593Smuzhiyun * Copyright 2003 PathScale, Inc. 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #ifndef __UM_PAGE_H 8*4882a593Smuzhiyun #define __UM_PAGE_H 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #include <linux/const.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun /* PAGE_SHIFT determines the page size */ 13*4882a593Smuzhiyun #define PAGE_SHIFT 12 14*4882a593Smuzhiyun #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) 15*4882a593Smuzhiyun #define PAGE_MASK (~(PAGE_SIZE-1)) 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun struct page; 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun #include <linux/pfn.h> 22*4882a593Smuzhiyun #include <linux/types.h> 23*4882a593Smuzhiyun #include <asm/vm-flags.h> 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun /* 26*4882a593Smuzhiyun * These are used to make use of C type-checking.. 27*4882a593Smuzhiyun */ 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 30*4882a593Smuzhiyun #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun #define clear_user_page(page, vaddr, pg) clear_page(page) 33*4882a593Smuzhiyun #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun #if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT) 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun typedef struct { unsigned long pte; } pte_t; 38*4882a593Smuzhiyun typedef struct { unsigned long pmd; } pmd_t; 39*4882a593Smuzhiyun typedef struct { unsigned long pgd; } pgd_t; 40*4882a593Smuzhiyun #define pte_val(p) ((p).pte) 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun #define pte_get_bits(p, bits) ((p).pte & (bits)) 43*4882a593Smuzhiyun #define pte_set_bits(p, bits) ((p).pte |= (bits)) 44*4882a593Smuzhiyun #define pte_clear_bits(p, bits) ((p).pte &= ~(bits)) 45*4882a593Smuzhiyun #define pte_copy(to, from) ({ (to).pte = (from).pte; }) 46*4882a593Smuzhiyun #define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE)) 47*4882a593Smuzhiyun #define pte_set_val(p, phys, prot) \ 48*4882a593Smuzhiyun ({ (p).pte = (phys) | pgprot_val(prot); }) 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun #define pmd_val(x) ((x).pmd) 51*4882a593Smuzhiyun #define __pmd(x) ((pmd_t) { (x) } ) 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun typedef unsigned long long phys_t; 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun #else 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun typedef struct { unsigned long pte; } pte_t; 58*4882a593Smuzhiyun typedef struct { unsigned long pgd; } pgd_t; 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun #ifdef CONFIG_3_LEVEL_PGTABLES 61*4882a593Smuzhiyun typedef struct { unsigned long pmd; } pmd_t; 62*4882a593Smuzhiyun #define pmd_val(x) ((x).pmd) 63*4882a593Smuzhiyun #define __pmd(x) ((pmd_t) { (x) } ) 64*4882a593Smuzhiyun #endif 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun #define pte_val(x) ((x).pte) 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun #define pte_get_bits(p, bits) ((p).pte & (bits)) 70*4882a593Smuzhiyun #define pte_set_bits(p, bits) ((p).pte |= (bits)) 71*4882a593Smuzhiyun #define pte_clear_bits(p, bits) ((p).pte &= ~(bits)) 72*4882a593Smuzhiyun #define pte_copy(to, from) ((to).pte = (from).pte) 73*4882a593Smuzhiyun #define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE)) 74*4882a593Smuzhiyun #define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot)) 75*4882a593Smuzhiyun 76*4882a593Smuzhiyun typedef unsigned long phys_t; 77*4882a593Smuzhiyun 78*4882a593Smuzhiyun #endif 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun typedef struct { unsigned long pgprot; } pgprot_t; 81*4882a593Smuzhiyun 82*4882a593Smuzhiyun typedef struct page *pgtable_t; 83*4882a593Smuzhiyun 84*4882a593Smuzhiyun #define pgd_val(x) ((x).pgd) 85*4882a593Smuzhiyun #define pgprot_val(x) ((x).pgprot) 86*4882a593Smuzhiyun 87*4882a593Smuzhiyun #define __pte(x) ((pte_t) { (x) } ) 88*4882a593Smuzhiyun #define __pgd(x) ((pgd_t) { (x) } ) 89*4882a593Smuzhiyun #define __pgprot(x) ((pgprot_t) { (x) } ) 90*4882a593Smuzhiyun 91*4882a593Smuzhiyun extern unsigned long uml_physmem; 92*4882a593Smuzhiyun 93*4882a593Smuzhiyun #define PAGE_OFFSET (uml_physmem) 94*4882a593Smuzhiyun #define KERNELBASE PAGE_OFFSET 95*4882a593Smuzhiyun 96*4882a593Smuzhiyun #define __va_space (8*1024*1024) 97*4882a593Smuzhiyun 98*4882a593Smuzhiyun #include <mem.h> 99*4882a593Smuzhiyun 100*4882a593Smuzhiyun /* Cast to unsigned long before casting to void * to avoid a warning from 101*4882a593Smuzhiyun * mmap_kmem about cutting a long long down to a void *. Not sure that 102*4882a593Smuzhiyun * casting is the right thing, but 32-bit UML can't have 64-bit virtual 103*4882a593Smuzhiyun * addresses 104*4882a593Smuzhiyun */ 105*4882a593Smuzhiyun #define __pa(virt) to_phys((void *) (unsigned long) (virt)) 106*4882a593Smuzhiyun #define __va(phys) to_virt((unsigned long) (phys)) 107*4882a593Smuzhiyun 108*4882a593Smuzhiyun #define phys_to_pfn(p) ((p) >> PAGE_SHIFT) 109*4882a593Smuzhiyun #define pfn_to_phys(pfn) PFN_PHYS(pfn) 110*4882a593Smuzhiyun 111*4882a593Smuzhiyun #define pfn_valid(pfn) ((pfn) < max_mapnr) 112*4882a593Smuzhiyun #define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v))) 113*4882a593Smuzhiyun 114*4882a593Smuzhiyun #include <asm-generic/memory_model.h> 115*4882a593Smuzhiyun #include <asm-generic/getorder.h> 116*4882a593Smuzhiyun 117*4882a593Smuzhiyun #endif /* __ASSEMBLY__ */ 118*4882a593Smuzhiyun 119*4882a593Smuzhiyun #ifdef CONFIG_X86_32 120*4882a593Smuzhiyun #define __HAVE_ARCH_GATE_AREA 1 121*4882a593Smuzhiyun #endif 122*4882a593Smuzhiyun 123*4882a593Smuzhiyun #endif /* __UM_PAGE_H */ 124