2 * include/asm-s390/page.h
5 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Hartmut Penner (hp@de.ibm.com)
12 #include <linux/const.h>
13 #include <asm/types.h>
15 /* PAGE_SHIFT determines the page size */
17 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
18 #define PAGE_MASK (~(PAGE_SIZE-1))
19 #define PAGE_DEFAULT_ACC 0
20 #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
23 #include <asm/setup.h>
26 static inline void clear_page(void *page
)
28 register unsigned long reg1
asm ("1") = 0;
29 register void *reg2
asm ("2") = page
;
30 register unsigned long reg3
asm ("3") = 4096;
33 : "+d" (reg2
), "+d" (reg3
) : "d" (reg1
) : "memory", "cc");
36 static inline void copy_page(void *to
, void *from
)
38 if (MACHINE_HAS_MVPG
) {
39 register unsigned long reg0
asm ("0") = 0;
42 : : "a" (to
), "a" (from
), "d" (reg0
)
46 " mvc 0(256,%0),0(%1)\n"
47 " mvc 256(256,%0),256(%1)\n"
48 " mvc 512(256,%0),512(%1)\n"
49 " mvc 768(256,%0),768(%1)\n"
50 " mvc 1024(256,%0),1024(%1)\n"
51 " mvc 1280(256,%0),1280(%1)\n"
52 " mvc 1536(256,%0),1536(%1)\n"
53 " mvc 1792(256,%0),1792(%1)\n"
54 " mvc 2048(256,%0),2048(%1)\n"
55 " mvc 2304(256,%0),2304(%1)\n"
56 " mvc 2560(256,%0),2560(%1)\n"
57 " mvc 2816(256,%0),2816(%1)\n"
58 " mvc 3072(256,%0),3072(%1)\n"
59 " mvc 3328(256,%0),3328(%1)\n"
60 " mvc 3584(256,%0),3584(%1)\n"
61 " mvc 3840(256,%0),3840(%1)\n"
62 : : "a" (to
), "a" (from
) : "memory");
65 #define clear_user_page(page, vaddr, pg) clear_page(page)
66 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
68 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
69 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
70 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
73 * These are used to make use of C type-checking..
76 typedef struct { unsigned long pgprot
; } pgprot_t
;
77 typedef struct { unsigned long pte
; } pte_t
;
79 #define pte_val(x) ((x).pte)
80 #define pgprot_val(x) ((x).pgprot)
84 typedef struct { unsigned long pmd
; } pmd_t
;
92 #define pmd_val(x) ((x).pmd)
93 #define pgd_val(x) ((x).pgd0)
101 typedef struct { unsigned long pgd
; } pgd_t
;
103 #define pmd_val(x) ((x).pmd0)
104 #define pmd_val1(x) ((x).pmd1)
105 #define pgd_val(x) ((x).pgd)
107 #endif /* __s390x__ */
109 #define __pte(x) ((pte_t) { (x) } )
110 #define __pmd(x) ((pmd_t) { (x) } )
111 #define __pgd(x) ((pgd_t) { (x) } )
112 #define __pgprot(x) ((pgprot_t) { (x) } )
114 /* default storage key used for all pages */
115 extern unsigned int default_storage_key
;
118 page_set_storage_key(unsigned long addr
, unsigned int skey
)
120 asm volatile("sske %0,%1" : : "d" (skey
), "a" (addr
));
123 static inline unsigned int
124 page_get_storage_key(unsigned long addr
)
128 asm volatile("iske %0,%1" : "=d" (skey
) : "a" (addr
), "0" (0));
132 extern unsigned long max_pfn
;
134 static inline int pfn_valid(unsigned long pfn
)
146 : "=d" (dummy
), "=d" (ccode
)
147 : "a" (pfn
<< PAGE_SHIFT
)
152 #endif /* !__ASSEMBLY__ */
154 /* to align the pointer to the (next) page boundary */
155 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
157 #define __PAGE_OFFSET 0x0UL
158 #define PAGE_OFFSET 0x0UL
159 #define __pa(x) (unsigned long)(x)
160 #define __va(x) (void *)(unsigned long)(x)
161 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
162 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
163 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
165 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
166 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
168 #include <asm-generic/memory_model.h>
169 #include <asm-generic/page.h>
171 #endif /* __KERNEL__ */
173 #endif /* _S390_PAGE_H */