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

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