3 * Copyright IBM Corp. 1999, 2000
4 * Author(s): Hartmut Penner (hp@de.ibm.com)
10 #include <linux/const.h>
11 #include <asm/types.h>
13 /* PAGE_SHIFT determines the page size */
15 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
16 #define PAGE_MASK (~(PAGE_SIZE-1))
17 #define PAGE_DEFAULT_ACC 0
18 #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
20 #define HPAGE_SHIFT 20
21 #define HPAGE_SIZE (1UL << HPAGE_SHIFT)
22 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
23 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
25 #define ARCH_HAS_SETCLEAR_HUGE_PTE
26 #define ARCH_HAS_HUGE_PTE_TYPE
27 #define ARCH_HAS_PREPARE_HUGEPAGE
28 #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
30 #include <asm/setup.h>
33 static inline void storage_key_init_range(unsigned long start
, unsigned long end
)
36 __storage_key_init_range(start
, end
);
40 static inline void clear_page(void *page
)
42 register unsigned long reg1
asm ("1") = 0;
43 register void *reg2
asm ("2") = page
;
44 register unsigned long reg3
asm ("3") = 4096;
47 : "+d" (reg2
), "+d" (reg3
) : "d" (reg1
)
51 static inline void copy_page(void *to
, void *from
)
53 if (MACHINE_HAS_MVPG
) {
54 register unsigned long reg0
asm ("0") = 0;
57 : : "a" (to
), "a" (from
), "d" (reg0
)
61 " mvc 0(256,%0),0(%1)\n"
62 " mvc 256(256,%0),256(%1)\n"
63 " mvc 512(256,%0),512(%1)\n"
64 " mvc 768(256,%0),768(%1)\n"
65 " mvc 1024(256,%0),1024(%1)\n"
66 " mvc 1280(256,%0),1280(%1)\n"
67 " mvc 1536(256,%0),1536(%1)\n"
68 " mvc 1792(256,%0),1792(%1)\n"
69 " mvc 2048(256,%0),2048(%1)\n"
70 " mvc 2304(256,%0),2304(%1)\n"
71 " mvc 2560(256,%0),2560(%1)\n"
72 " mvc 2816(256,%0),2816(%1)\n"
73 " mvc 3072(256,%0),3072(%1)\n"
74 " mvc 3328(256,%0),3328(%1)\n"
75 " mvc 3584(256,%0),3584(%1)\n"
76 " mvc 3840(256,%0),3840(%1)\n"
77 : : "a" (to
), "a" (from
) : "memory");
80 #define clear_user_page(page, vaddr, pg) clear_page(page)
81 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
83 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
84 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
85 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
88 * These are used to make use of C type-checking..
91 typedef struct { unsigned long pgprot
; } pgprot_t
;
92 typedef struct { unsigned long pgste
; } pgste_t
;
93 typedef struct { unsigned long pte
; } pte_t
;
94 typedef struct { unsigned long pmd
; } pmd_t
;
95 typedef struct { unsigned long pud
; } pud_t
;
96 typedef struct { unsigned long pgd
; } pgd_t
;
97 typedef pte_t
*pgtable_t
;
99 #define pgprot_val(x) ((x).pgprot)
100 #define pgste_val(x) ((x).pgste)
101 #define pte_val(x) ((x).pte)
102 #define pmd_val(x) ((x).pmd)
103 #define pud_val(x) ((x).pud)
104 #define pgd_val(x) ((x).pgd)
106 #define __pgste(x) ((pgste_t) { (x) } )
107 #define __pte(x) ((pte_t) { (x) } )
108 #define __pmd(x) ((pmd_t) { (x) } )
109 #define __pud(x) ((pud_t) { (x) } )
110 #define __pgd(x) ((pgd_t) { (x) } )
111 #define __pgprot(x) ((pgprot_t) { (x) } )
113 static inline void page_set_storage_key(unsigned long addr
,
114 unsigned char skey
, int mapped
)
117 asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0"
118 : : "d" (skey
), "a" (addr
));
120 asm volatile("sske %0,%1" : : "d" (skey
), "a" (addr
));
123 static inline unsigned char page_get_storage_key(unsigned long addr
)
127 asm volatile("iske %0,%1" : "=d" (skey
) : "a" (addr
));
131 static inline int page_reset_referenced(unsigned long addr
)
138 : "=d" (ipm
) : "a" (addr
) : "cc");
139 return !!(ipm
& 0x20000000);
142 /* Bits int the storage key */
143 #define _PAGE_CHANGED 0x02 /* HW changed bit */
144 #define _PAGE_REFERENCED 0x04 /* HW referenced bit */
145 #define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */
146 #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */
149 void arch_free_page(struct page
*page
, int order
);
150 void arch_alloc_page(struct page
*page
, int order
);
151 void arch_set_page_states(int make_stable
);
153 static inline int devmem_is_allowed(unsigned long pfn
)
158 #define HAVE_ARCH_FREE_PAGE
159 #define HAVE_ARCH_ALLOC_PAGE
161 #endif /* !__ASSEMBLY__ */
163 #define __PAGE_OFFSET 0x0UL
164 #define PAGE_OFFSET 0x0UL
165 #define __pa(x) (unsigned long)(x)
166 #define __va(x) (void *)(unsigned long)(x)
167 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
168 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
169 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
171 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
172 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
174 #include <asm-generic/memory_model.h>
175 #include <asm-generic/getorder.h>
177 #define __HAVE_ARCH_GATE_AREA 1
179 #endif /* _S390_PAGE_H */
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