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
37
38#define STRICT_MM_TYPECHECKS
39#ifdef STRICT_MM_TYPECHECKS
40typedef struct { unsigned long pte; } pte_t;
41
42
43
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
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
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
85
86typedef struct page *pgtable_t;
87
88typedef struct __physmem_range {
89 unsigned long start_pfn;
90 unsigned long pages;
91} physmem_range_t;
92
93extern physmem_range_t pmem_ranges[];
94extern int npmem_ranges;
95
96#endif
97
98
99
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
117
118
119#ifdef CONFIG_64BIT
120#define __PAGE_OFFSET (0x40000000)
121#else
122#define __PAGE_OFFSET (0x10000000)
123#endif
124
125#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
126
127
128#define GATEWAY_PAGE_SIZE 0x4000
129
130
131
132
133#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
134
135
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
146
147#ifdef CONFIG_HUGETLB_PAGE
148#define HPAGE_SHIFT PMD_SHIFT
149#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
150#define HPAGE_MASK (~(HPAGE_SIZE - 1))
151#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
152
153#if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
154# define REAL_HPAGE_SHIFT 20
155# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M
156#elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
157# define REAL_HPAGE_SHIFT 22
158# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M
159#else
160# define REAL_HPAGE_SHIFT 24
161# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M
162#endif
163#endif
164
165#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
166
167#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
168#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
169
170#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
171 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
172
173#include <asm-generic/memory_model.h>
174#include <asm-generic/getorder.h>
175#include <asm/pdc.h>
176
177#define PAGE0 ((struct zeropage *)__PAGE_OFFSET)
178
179
180
181
182#endif
183