summaryrefslogtreecommitdiffstats
path: root/include/asm-s390/page.h
blob: b2628dc5c49075d0841c9b440c2b8a8288f4cd6e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
/*
 *  include/asm-s390/page.h
 *
 *  S390 version
 *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
 *    Author(s): Hartmut Penner (hp@de.ibm.com)
 */

#ifndef _S390_PAGE_H
#define _S390_PAGE_H

#include <asm/types.h>

/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT      12
#define PAGE_SIZE       (1UL << PAGE_SHIFT)
#define PAGE_MASK       (~(PAGE_SIZE-1))
#define PAGE_DEFAULT_ACC	0
#define PAGE_DEFAULT_KEY	(PAGE_DEFAULT_ACC << 4)

#ifdef __KERNEL__
#include <asm/setup.h>
#ifndef __ASSEMBLY__

#ifndef __s390x__

static inline void clear_page(void *page)
{
	register_pair rp;

	rp.subreg.even = (unsigned long) page;
	rp.subreg.odd = (unsigned long) 4096;
        asm volatile ("   slr  1,1\n"
		      "   mvcl %0,0"
		      : "+&a" (rp) : : "memory", "cc", "1" );
}

static inline void copy_page(void *to, void *from)
{
        if (MACHINE_HAS_MVPG)
		asm volatile ("   sr   0,0\n"
			      "   mvpg %0,%1"
			      : : "a" ((void *)(to)), "a" ((void *)(from))
			      : "memory", "cc", "0" );
	else
		asm volatile ("   mvc  0(256,%0),0(%1)\n"
			      "   mvc  256(256,%0),256(%1)\n"
			      "   mvc  512(256,%0),512(%1)\n"
			      "   mvc  768(256,%0),768(%1)\n"
			      "   mvc  1024(256,%0),1024(%1)\n"
			      "   mvc  1280(256,%0),1280(%1)\n"
			      "   mvc  1536(256,%0),1536(%1)\n"
			      "   mvc  1792(256,%0),1792(%1)\n"
			      "   mvc  2048(256,%0),2048(%1)\n"
			      "   mvc  2304(256,%0),2304(%1)\n"
			      "   mvc  2560(256,%0),2560(%1)\n"
			      "   mvc  2816(256,%0),2816(%1)\n"
			      "   mvc  3072(256,%0),3072(%1)\n"
			      "   mvc  3328(256,%0),3328(%1)\n"
			      "   mvc  3584(256,%0),3584(%1)\n"
			      "   mvc  3840(256,%0),3840(%1)\n"
			      : : "a"((void *)(to)),"a"((void *)(from)) 
			      : "memory" );
}

#else /* __s390x__ */

static inline void clear_page(void *page)
{
        asm volatile ("   lgr  2,%0\n"
                      "   lghi 3,4096\n"
                      "   slgr 1,1\n"
                      "   mvcl 2,0"
                      : : "a" ((void *) (page))
		      : "memory", "cc", "1", "2", "3" );
}

static inline void copy_page(void *to, void *from)
{
        if (MACHINE_HAS_MVPG)
		asm volatile ("   sgr  0,0\n"
			      "   mvpg %0,%1"
			      : : "a" ((void *)(to)), "a" ((void *)(from))
			      : "memory", "cc", "0" );
	else
		asm volatile ("   mvc  0(256,%0),0(%1)\n"
			      "   mvc  256(256,%0),256(%1)\n"
			      "   mvc  512(256,%0),512(%1)\n"
			      "   mvc  768(256,%0),768(%1)\n"
			      "   mvc  1024(256,%0),1024(%1)\n"
			      "   mvc  1280(256,%0),1280(%1)\n"
			      "   mvc  1536(256,%0),1536(%1)\n"
			      "   mvc  1792(256,%0),1792(%1)\n"
			      "   mvc  2048(256,%0),2048(%1)\n"
			      "   mvc  2304(256,%0),2304(%1)\n"
			      "   mvc  2560(256,%0),2560(%1)\n"
			      "   mvc  2816(256,%0),2816(%1)\n"
			      "   mvc  3072(256,%0),3072(%1)\n"
			      "   mvc  3328(256,%0),3328(%1)\n"
			      "   mvc  3584(256,%0),3584(%1)\n"
			      "   mvc  3840(256,%0),3840(%1)\n"
			      : : "a"((void *)(to)),"a"((void *)(from)) 
			      : "memory" );
}

#endif /* __s390x__ */

#define clear_user_page(page, vaddr, pg)	clear_page(page)
#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)

#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE

/*
 * These are used to make use of C type-checking..
 */

typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct { unsigned long pte; } pte_t;

#define pte_val(x)      ((x).pte)
#define pgprot_val(x)   ((x).pgprot)

#ifndef __s390x__

typedef struct { unsigned long pmd; } pmd_t;
typedef struct {
        unsigned long pgd0;
        unsigned long pgd1;
        unsigned long pgd2;
        unsigned long pgd3;
        } pgd_t;

#define pmd_val(x)      ((x).pmd)
#define pgd_val(x)      ((x).pgd0)

#else /* __s390x__ */

typedef struct { 
        unsigned long pmd0;
        unsigned long pmd1; 
        } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;

#define pmd_val(x)      ((x).pmd0)
#define pmd_val1(x)     ((x).pmd1)
#define pgd_val(x)      ((x).pgd)

#endif /* __s390x__ */

#define __pte(x)        ((pte_t) { (x) } )
#define __pmd(x)        ((pmd_t) { (x) } )
#define __pgd(x)        ((pgd_t) { (x) } )
#define __pgprot(x)     ((pgprot_t) { (x) } )

/* default storage key used for all pages */
extern unsigned int default_storage_key;

static inline void
page_set_storage_key(unsigned long addr, unsigned int skey)
{
	asm volatile ( "sske %0,%1" : : "d" (skey), "a" (addr) );
}

static inline unsigned int
page_get_storage_key(unsigned long addr)
{
	unsigned int skey;

	asm volatile ( "iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0) );

	return skey;
}

#endif /* !__ASSEMBLY__ */

/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)

#define __PAGE_OFFSET           0x0UL
#define PAGE_OFFSET             0x0UL
#define __pa(x)                 (unsigned long)(x)
#define __va(x)                 (void *)(unsigned long)(x)
#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)

#define pfn_valid(pfn)		((pfn) < max_mapnr)
#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)

#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>

#endif /* __KERNEL__ */

#endif /* _S390_PAGE_H */