1/*
  2 *  arch/arm/include/asm/pgtable-nommu.h
  3 *
  4 *  Copyright (C) 1995-2002 Russell King
  5 *  Copyright (C) 2004  Hyok S. Choi
  6 *
  7 * This program is free software; you can redistribute it and/or modify
  8 * it under the terms of the GNU General Public License version 2 as
  9 * published by the Free Software Foundation.
 10 */
 11#ifndef _ASMARM_PGTABLE_NOMMU_H
 12#define _ASMARM_PGTABLE_NOMMU_H
 13
 14#ifndef __ASSEMBLY__
 15
 16#include <linux/slab.h>
 17#include <asm/processor.h>
 18#include <asm/page.h>
 19
 20/*
 21 * Trivial page table functions.
 22 */
 23#define pgd_present(pgd)	(1)
 24#define pgd_none(pgd)		(0)
 25#define pgd_bad(pgd)		(0)
 26#define pgd_clear(pgdp)
 27#define kern_addr_valid(addr)	(1)
 28#define	pmd_offset(a, b)	((void *)0)
 29/* FIXME */
 30/*
 31 * PMD_SHIFT determines the size of the area a second-level page table can map
 32 * PGDIR_SHIFT determines what a third-level page table entry can map
 33 */
 34#define PGDIR_SHIFT		21
 35
 36#define PGDIR_SIZE		(1UL << PGDIR_SHIFT)
 37#define PGDIR_MASK		(~(PGDIR_SIZE-1))
 38/* FIXME */
 39
 40#define PAGE_NONE	__pgprot(0)
 41#define PAGE_SHARED	__pgprot(0)
 42#define PAGE_COPY	__pgprot(0)
 43#define PAGE_READONLY	__pgprot(0)
 44#define PAGE_KERNEL	__pgprot(0)
 45
 46#define swapper_pg_dir ((pgd_t *) 0)
 47
 48#define __swp_type(x)		(0)
 49#define __swp_offset(x)		(0)
 50#define __swp_entry(typ,off)	((swp_entry_t) { ((typ) | ((off) << 7)) })
 51#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
 52#define __swp_entry_to_pte(x)	((pte_t) { (x).val })
 53
 54
 55typedef pte_t *pte_addr_t;
 56
 57static inline int pte_file(pte_t pte) { return 0; }
 58
 59/*
 60 * ZERO_PAGE is a global shared page that is always zero: used
 61 * for zero-mapped memory areas etc..
 62 */
 63#define ZERO_PAGE(vaddr)	(virt_to_page(0))
 64
 65/*
 66 * Mark the prot value as uncacheable and unbufferable.
 67 */
 68#define pgprot_noncached(prot)	__pgprot(0)
 69#define pgprot_writecombine(prot) __pgprot(0)
 70#define pgprot_dmacoherent(prot) __pgprot(0)
 71
 72
 73/*
 74 * These would be in other places but having them here reduces the diffs.
 75 */
 76extern unsigned int kobjsize(const void *objp);
 77
 78/*
 79 * No page table caches to initialise.
 80 */
 81#define pgtable_cache_init()	do { } while (0)
 82#define io_remap_pfn_range	remap_pfn_range
 83
 84
 85/*
 86 * All 32bit addresses are effectively valid for vmalloc...
 87 * Sort of meaningless for non-VM targets.
 88 */
 89#define	VMALLOC_START	0UL
 90#define	VMALLOC_END	0xffffffffUL
 91
 92#define FIRST_USER_ADDRESS      (0)
 93
 94#include <asm-generic/pgtable.h>
 95
 96#else 
 97
 98/*
 99 * dummy tlb and user structures.
100 */
101#define v3_tlb_fns	(0)
102#define v4_tlb_fns	(0)
103#define v4wb_tlb_fns	(0)
104#define v4wbi_tlb_fns	(0)
105#define v6wbi_tlb_fns	(0)
106#define v7wbi_tlb_fns	(0)
107
108#define v3_user_fns	(0)
109#define v4_user_fns	(0)
110#define v4_mc_user_fns	(0)
111#define v4wb_user_fns	(0)
112#define v4wt_user_fns	(0)
113#define v6_user_fns	(0)
114#define xscale_mc_user_fns (0)
115
116#endif /*__ASSEMBLY__*/
117
118#endif /* _ASMARM_PGTABLE_H */

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  arch/arm/include/asm/pgtable-nommu.h
 4 *
 5 *  Copyright (C) 1995-2002 Russell King
 6 *  Copyright (C) 2004  Hyok S. Choi
 
 
 
 
 7 */
 8#ifndef _ASMARM_PGTABLE_NOMMU_H
 9#define _ASMARM_PGTABLE_NOMMU_H
10
11#ifndef __ASSEMBLY__
12
13#include <linux/slab.h>
14#include <asm/processor.h>
15#include <asm/page.h>
16
17/*
18 * Trivial page table functions.
19 */
20#define pgd_present(pgd)	(1)
21#define pgd_none(pgd)		(0)
22#define pgd_bad(pgd)		(0)
23#define pgd_clear(pgdp)
24#define kern_addr_valid(addr)	(1)
 
25/* FIXME */
26/*
27 * PMD_SHIFT determines the size of the area a second-level page table can map
28 * PGDIR_SHIFT determines what a third-level page table entry can map
29 */
30#define PGDIR_SHIFT		21
31
32#define PGDIR_SIZE		(1UL << PGDIR_SHIFT)
33#define PGDIR_MASK		(~(PGDIR_SIZE-1))
34/* FIXME */
35
36#define PAGE_NONE	__pgprot(0)
37#define PAGE_SHARED	__pgprot(0)
38#define PAGE_COPY	__pgprot(0)
39#define PAGE_READONLY	__pgprot(0)
40#define PAGE_KERNEL	__pgprot(0)
41
42#define swapper_pg_dir ((pgd_t *) 0)
43
 
 
 
 
 
 
44
45typedef pte_t *pte_addr_t;
46
 
 
47/*
48 * ZERO_PAGE is a global shared page that is always zero: used
49 * for zero-mapped memory areas etc..
50 */
51#define ZERO_PAGE(vaddr)	(virt_to_page(0))
52
53/*
54 * Mark the prot value as uncacheable and unbufferable.
55 */
56#define pgprot_noncached(prot)	(prot)
57#define pgprot_writecombine(prot) (prot)
58#define pgprot_device(prot)	(prot)
59
60
61/*
62 * These would be in other places but having them here reduces the diffs.
63 */
64extern unsigned int kobjsize(const void *objp);
65
66/*
 
 
 
 
 
 
 
67 * All 32bit addresses are effectively valid for vmalloc...
68 * Sort of meaningless for non-VM targets.
69 */
70#define	VMALLOC_START	0UL
71#define	VMALLOC_END	0xffffffffUL
72
73#define FIRST_USER_ADDRESS      0UL
 
 
74
75#else 
76
77/*
78 * dummy tlb and user structures.
79 */
80#define v3_tlb_fns	(0)
81#define v4_tlb_fns	(0)
82#define v4wb_tlb_fns	(0)
83#define v4wbi_tlb_fns	(0)
84#define v6wbi_tlb_fns	(0)
85#define v7wbi_tlb_fns	(0)
86
87#define v3_user_fns	(0)
88#define v4_user_fns	(0)
89#define v4_mc_user_fns	(0)
90#define v4wb_user_fns	(0)
91#define v4wt_user_fns	(0)
92#define v6_user_fns	(0)
93#define xscale_mc_user_fns (0)
94
95#endif /*__ASSEMBLY__*/
96
97#endif /* _ASMARM_PGTABLE_H */