1
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
38
39#define STRICT_MM_TYPECHECKS
40#ifdef STRICT_MM_TYPECHECKS
41typedef struct { unsigned long pte; } pte_t;
42
43
44
45typedef struct { __u32 pmd; } pmd_t;
46typedef struct { __u32 pgd; } pgd_t;
47typedef struct { unsigned long pgprot; } pgprot_t;
48
49#define pte_val(x) ((x).pte)
50
51#define pmd_val(x) ((x).pmd + 0)
52#define pgd_val(x) ((x).pgd + 0)
53#define pgprot_val(x) ((x).pgprot)
54
55#define __pte(x) ((pte_t) { (x) } )
56#define __pmd(x) ((pmd_t) { (x) } )
57#define __pgd(x) ((pgd_t) { (x) } )
58#define __pgprot(x) ((pgprot_t) { (x) } )
59
60#define __pmd_val_set(x,n) (x).pmd = (n)
61#define __pgd_val_set(x,n) (x).pgd = (n)
62
63#else
64
65
66
67typedef unsigned long pte_t;
68typedef __u32 pmd_t;
69typedef __u32 pgd_t;
70typedef unsigned long pgprot_t;
71
72#define pte_val(x) (x)
73#define pmd_val(x) (x)
74#define pgd_val(x) (x)
75#define pgprot_val(x) (x)
76
77#define __pte(x) (x)
78#define __pmd(x) (x)
79#define __pgd(x) (x)
80#define __pgprot(x) (x)
81
82#define __pmd_val_set(x,n) (x) = (n)
83#define __pgd_val_set(x,n) (x) = (n)
84
85#endif
86
87typedef struct page *pgtable_t;
88
89typedef struct __physmem_range {
90 unsigned long start_pfn;
91 unsigned long pages;
92} physmem_range_t;
93
94extern physmem_range_t pmem_ranges[];
95extern int npmem_ranges;
96
97#endif
98
99
100
101
102#ifdef CONFIG_64BIT
103#define BITS_PER_PTE_ENTRY 3
104#define BITS_PER_PMD_ENTRY 2
105#define BITS_PER_PGD_ENTRY 2
106#else
107#define BITS_PER_PTE_ENTRY 2
108#define BITS_PER_PMD_ENTRY 2
109#define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
110#endif
111#define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
112#define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
113#define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
114
115#define LINUX_GATEWAY_SPACE 0
116
117
118
119
120#if defined(BOOTLOADER)
121#define __PAGE_OFFSET (0)
122#else
123#ifdef CONFIG_64BIT
124#define __PAGE_OFFSET (0x40000000)
125#else
126#define __PAGE_OFFSET (0x10000000)
127#endif
128#endif
129
130#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
131
132
133#define GATEWAY_PAGE_SIZE 0x4000
134
135
136
137
138#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
139
140
141#ifdef __ASSEMBLY__
142# define PA(x) ((x)-__PAGE_OFFSET)
143# define VA(x) ((x)+__PAGE_OFFSET)
144#endif
145#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
146#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
147
148#ifndef CONFIG_DISCONTIGMEM
149#define pfn_valid(pfn) ((pfn) < max_mapnr)
150#endif
151
152#ifdef CONFIG_HUGETLB_PAGE
153#define HPAGE_SHIFT PMD_SHIFT
154#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
155#define HPAGE_MASK (~(HPAGE_SIZE - 1))
156#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
157
158#if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
159# define REAL_HPAGE_SHIFT 20
160# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M
161#elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
162# define REAL_HPAGE_SHIFT 22
163# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M
164#else
165# define REAL_HPAGE_SHIFT 24
166# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M
167#endif
168#endif
169
170#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
171
172#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
173#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
174
175#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
176 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
177
178#include <asm-generic/memory_model.h>
179#include <asm-generic/getorder.h>
180#include <asm/pdc.h>
181
182#define PAGE0 ((struct zeropage *)__PAGE_OFFSET)
183
184
185
186
187#endif
188