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 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
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
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
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;
98} physmem_range_t;
99
100extern physmem_range_t pmem_ranges[];
101extern int npmem_ranges;
102
103#endif
104
105
106
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
124
125
126#ifdef CONFIG_64BIT
127#define __PAGE_OFFSET_DEFAULT (0x40000000)
128#else
129#define __PAGE_OFFSET_DEFAULT (0x10000000)
130#endif
131
132#if defined(BOOTLOADER)
133#define __PAGE_OFFSET (0)
134#else
135#define __PAGE_OFFSET __PAGE_OFFSET_DEFAULT
136#endif
137
138#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
139
140
141#define GATEWAY_PAGE_SIZE 0x4000
142
143
144
145
146#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
147
148
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
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
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
171# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M
172#else
173# define REAL_HPAGE_SHIFT 24
174# define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M
175#endif
176#endif
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 *)__PAGE_OFFSET)
188
189
190
191
192#endif
193