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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#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
8# define PAGE_SHIFT 12
9#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
10# define PAGE_SHIFT 14
11#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
12# define PAGE_SHIFT 16
13#else
14# error "unknown default kernel page size"
15#endif
16#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
17#define PAGE_MASK (~(PAGE_SIZE-1))
18
19
20#ifndef __ASSEMBLY__
21
22#include <asm/types.h>
23#include <asm/cache.h>
24
25#define clear_page(page) clear_page_asm((void *)(page))
26#define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from))
27
28struct page;
29
30void clear_page_asm(void *page);
31void copy_page_asm(void *to, void *from);
32#define clear_user_page(vto, vaddr, page) clear_page_asm(vto)
33void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
34 struct page *pg);
35
36/*
37 * These are used to make use of C type-checking..
38 */
39#define STRICT_MM_TYPECHECKS
40#ifdef STRICT_MM_TYPECHECKS
41typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */
42
43/* NOTE: even on 64 bits, these entries are __u32 because we allocate
44 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
45typedef struct { __u32 pgd; } pgd_t;
46typedef struct { unsigned long pgprot; } pgprot_t;
47
48#if CONFIG_PGTABLE_LEVELS == 3
49typedef struct { __u32 pmd; } pmd_t;
50#define __pmd(x) ((pmd_t) { (x) } )
51/* pXd_val() do not work as lvalues, so make sure we don't use them as such. */
52#define pmd_val(x) ((x).pmd + 0)
53#endif
54
55#define pte_val(x) ((x).pte)
56#define pgd_val(x) ((x).pgd + 0)
57#define pgprot_val(x) ((x).pgprot)
58
59#define __pte(x) ((pte_t) { (x) } )
60#define __pgd(x) ((pgd_t) { (x) } )
61#define __pgprot(x) ((pgprot_t) { (x) } )
62
63#else
64/*
65 * .. while these make it easier on the compiler
66 */
67typedef unsigned long pte_t;
68
69#if CONFIG_PGTABLE_LEVELS == 3
70typedef __u32 pmd_t;
71#define pmd_val(x) (x)
72#define __pmd(x) (x)
73#endif
74
75typedef __u32 pgd_t;
76typedef unsigned long pgprot_t;
77
78#define pte_val(x) (x)
79#define pgd_val(x) (x)
80#define pgprot_val(x) (x)
81
82#define __pte(x) (x)
83#define __pgd(x) (x)
84#define __pgprot(x) (x)
85
86#endif /* STRICT_MM_TYPECHECKS */
87
88#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
89#if CONFIG_PGTABLE_LEVELS == 3
90#define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
91#endif
92
93typedef struct page *pgtable_t;
94
95typedef struct __physmem_range {
96 unsigned long start_pfn;
97 unsigned long pages; /* PAGE_SIZE pages */
98} physmem_range_t;
99
100extern physmem_range_t pmem_ranges[];
101extern int npmem_ranges;
102
103#endif /* !__ASSEMBLY__ */
104
105/* WARNING: The definitions below must match exactly to sizeof(pte_t)
106 * etc
107 */
108#ifdef CONFIG_64BIT
109#define BITS_PER_PTE_ENTRY 3
110#define BITS_PER_PMD_ENTRY 2
111#define BITS_PER_PGD_ENTRY 2
112#else
113#define BITS_PER_PTE_ENTRY 2
114#define BITS_PER_PMD_ENTRY 2
115#define BITS_PER_PGD_ENTRY 2
116#endif
117#define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
118#define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
119#define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
120
121#define LINUX_GATEWAY_SPACE 0
122
123/* This governs the relationship between virtual and physical addresses.
124 * If you alter it, make sure to take care of our various fixed mapping
125 * segments in fixmap.h */
126#ifdef CONFIG_64BIT
127#define __PAGE_OFFSET_DEFAULT (0x40000000) /* 1GB */
128#else
129#define __PAGE_OFFSET_DEFAULT (0x10000000) /* 256MB */
130#endif
131
132#if defined(BOOTLOADER)
133#define __PAGE_OFFSET (0) /* bootloader uses physical addresses */
134#else
135#define __PAGE_OFFSET __PAGE_OFFSET_DEFAULT
136#endif /* BOOTLOADER */
137
138#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
139
140/* The size of the gateway page (we leave lots of room for expansion) */
141#define GATEWAY_PAGE_SIZE 0x4000
142
143/* The start of the actual kernel binary---used in vmlinux.lds.S
144 * Leave some space after __PAGE_OFFSET for detecting kernel null
145 * ptr derefs */
146#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
147
148/* These macros don't work for 64-bit C code -- don't allow in C at all */
149#ifdef __ASSEMBLY__
150# define PA(x) ((x)-__PAGE_OFFSET)
151# define VA(x) ((x)+__PAGE_OFFSET)
152#endif
153#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
154#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
155
156#ifndef CONFIG_SPARSEMEM
157#define pfn_valid(pfn) ((pfn) < max_mapnr)
158#endif
159
160#ifdef CONFIG_HUGETLB_PAGE
161#define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */
162#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
163#define HPAGE_MASK (~(HPAGE_SIZE - 1))
164#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
165
166#if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
167# define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */
168# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M
169#elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
170# define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */
171# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M
172#else
173# define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */
174# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M
175#endif
176#endif /* CONFIG_HUGETLB_PAGE */
177
178#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
179
180#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
181#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
182
183#include <asm-generic/memory_model.h>
184#include <asm-generic/getorder.h>
185#include <asm/pdc.h>
186
187#define PAGE0 ((struct zeropage *)absolute_pointer(__PAGE_OFFSET))
188
189/* DEFINITION OF THE ZERO-PAGE (PAG0) */
190/* based on work by Jason Eckhardt (jason@equator.com) */
191
192#endif /* _PARISC_PAGE_H */
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) clear_page_asm((void *)(page))
25#define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from))
26
27struct page;
28
29void clear_page_asm(void *page);
30void copy_page_asm(void *to, void *from);
31#define clear_user_page(vto, vaddr, page) clear_page_asm(vto)
32void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
33 struct page *pg);
34
35/*
36 * These are used to make use of C type-checking..
37 */
38#define STRICT_MM_TYPECHECKS
39#ifdef STRICT_MM_TYPECHECKS
40typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */
41
42/* NOTE: even on 64 bits, these entries are __u32 because we allocate
43 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
44typedef struct { __u32 pmd; } pmd_t;
45typedef struct { __u32 pgd; } pgd_t;
46typedef struct { unsigned long pgprot; } pgprot_t;
47
48#define pte_val(x) ((x).pte)
49/* These do not work lvalues, so make sure we don't use them as such. */
50#define pmd_val(x) ((x).pmd + 0)
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 __pmd(x) ((pmd_t) { (x) } )
56#define __pgd(x) ((pgd_t) { (x) } )
57#define __pgprot(x) ((pgprot_t) { (x) } )
58
59#define __pmd_val_set(x,n) (x).pmd = (n)
60#define __pgd_val_set(x,n) (x).pgd = (n)
61
62#else
63/*
64 * .. while these make it easier on the compiler
65 */
66typedef unsigned long pte_t;
67typedef __u32 pmd_t;
68typedef __u32 pgd_t;
69typedef unsigned long pgprot_t;
70
71#define pte_val(x) (x)
72#define pmd_val(x) (x)
73#define pgd_val(x) (x)
74#define pgprot_val(x) (x)
75
76#define __pte(x) (x)
77#define __pmd(x) (x)
78#define __pgd(x) (x)
79#define __pgprot(x) (x)
80
81#define __pmd_val_set(x,n) (x) = (n)
82#define __pgd_val_set(x,n) (x) = (n)
83
84#endif /* STRICT_MM_TYPECHECKS */
85
86typedef struct page *pgtable_t;
87
88typedef struct __physmem_range {
89 unsigned long start_pfn;
90 unsigned long pages; /* PAGE_SIZE pages */
91} physmem_range_t;
92
93extern physmem_range_t pmem_ranges[];
94extern int npmem_ranges;
95
96#endif /* !__ASSEMBLY__ */
97
98/* WARNING: The definitions below must match exactly to sizeof(pte_t)
99 * etc
100 */
101#ifdef CONFIG_64BIT
102#define BITS_PER_PTE_ENTRY 3
103#define BITS_PER_PMD_ENTRY 2
104#define BITS_PER_PGD_ENTRY 2
105#else
106#define BITS_PER_PTE_ENTRY 2
107#define BITS_PER_PMD_ENTRY 2
108#define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
109#endif
110#define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
111#define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
112#define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
113
114#define LINUX_GATEWAY_SPACE 0
115
116/* This governs the relationship between virtual and physical addresses.
117 * If you alter it, make sure to take care of our various fixed mapping
118 * segments in fixmap.h */
119#ifdef CONFIG_64BIT
120#define __PAGE_OFFSET (0x40000000) /* 1GB */
121#else
122#define __PAGE_OFFSET (0x10000000) /* 256MB */
123#endif
124
125#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
126
127/* The size of the gateway page (we leave lots of room for expansion) */
128#define GATEWAY_PAGE_SIZE 0x4000
129
130/* The start of the actual kernel binary---used in vmlinux.lds.S
131 * Leave some space after __PAGE_OFFSET for detecting kernel null
132 * ptr derefs */
133#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
134
135/* These macros don't work for 64-bit C code -- don't allow in C at all */
136#ifdef __ASSEMBLY__
137# define PA(x) ((x)-__PAGE_OFFSET)
138# define VA(x) ((x)+__PAGE_OFFSET)
139#endif
140#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
141#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
142
143#ifndef CONFIG_DISCONTIGMEM
144#define pfn_valid(pfn) ((pfn) < max_mapnr)
145#endif /* CONFIG_DISCONTIGMEM */
146
147#ifdef CONFIG_HUGETLB_PAGE
148#define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */
149#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
150#define HPAGE_MASK (~(HPAGE_SIZE - 1))
151#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
152#endif
153
154#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
155
156#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
157#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
158
159#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
160 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
161
162#include <asm-generic/memory_model.h>
163#include <asm-generic/getorder.h>
164#include <asm/pdc.h>
165
166#define PAGE0 ((struct zeropage *)__PAGE_OFFSET)
167
168/* DEFINITION OF THE ZERO-PAGE (PAG0) */
169/* based on work by Jason Eckhardt (jason@equator.com) */
170
171#endif /* _PARISC_PAGE_H */