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 <asm/types.h>
14 /* PAGE_SHIFT determines the page size */
16 #define PAGE_SIZE (1UL << PAGE_SHIFT)
17 #define PAGE_MASK (~(PAGE_SIZE-1))
18 #define PAGE_DEFAULT_ACC 0
19 #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
22 #include <asm/setup.h>
25 static inline void clear_page(void *page)
27 register unsigned long reg1 asm ("1") = 0;
28 register void *reg2 asm ("2") = page;
29 register unsigned long reg3 asm ("3") = 4096;
32 : "+d" (reg2), "+d" (reg3) : "d" (reg1) : "memory", "cc");
35 static inline void copy_page(void *to, void *from)
37 if (MACHINE_HAS_MVPG) {
38 register unsigned long reg0 asm ("0") = 0;
41 : : "a" (to), "a" (from), "d" (reg0)
45 " mvc 0(256,%0),0(%1)\n"
46 " mvc 256(256,%0),256(%1)\n"
47 " mvc 512(256,%0),512(%1)\n"
48 " mvc 768(256,%0),768(%1)\n"
49 " mvc 1024(256,%0),1024(%1)\n"
50 " mvc 1280(256,%0),1280(%1)\n"
51 " mvc 1536(256,%0),1536(%1)\n"
52 " mvc 1792(256,%0),1792(%1)\n"
53 " mvc 2048(256,%0),2048(%1)\n"
54 " mvc 2304(256,%0),2304(%1)\n"
55 " mvc 2560(256,%0),2560(%1)\n"
56 " mvc 2816(256,%0),2816(%1)\n"
57 " mvc 3072(256,%0),3072(%1)\n"
58 " mvc 3328(256,%0),3328(%1)\n"
59 " mvc 3584(256,%0),3584(%1)\n"
60 " mvc 3840(256,%0),3840(%1)\n"
61 : : "a" (to), "a" (from) : "memory");
64 #define clear_user_page(page, vaddr, pg) clear_page(page)
65 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
67 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
68 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
71 * These are used to make use of C type-checking..
74 typedef struct { unsigned long pgprot; } pgprot_t;
75 typedef struct { unsigned long pte; } pte_t;
77 #define pte_val(x) ((x).pte)
78 #define pgprot_val(x) ((x).pgprot)
82 typedef struct { unsigned long pmd; } pmd_t;
90 #define pmd_val(x) ((x).pmd)
91 #define pgd_val(x) ((x).pgd0)
99 typedef struct { unsigned long pgd; } pgd_t;
101 #define pmd_val(x) ((x).pmd0)
102 #define pmd_val1(x) ((x).pmd1)
103 #define pgd_val(x) ((x).pgd)
105 #endif /* __s390x__ */
107 #define __pte(x) ((pte_t) { (x) } )
108 #define __pmd(x) ((pmd_t) { (x) } )
109 #define __pgd(x) ((pgd_t) { (x) } )
110 #define __pgprot(x) ((pgprot_t) { (x) } )
112 /* default storage key used for all pages */
113 extern unsigned int default_storage_key;
116 page_set_storage_key(unsigned long addr, unsigned int skey)
118 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
121 static inline unsigned int
122 page_get_storage_key(unsigned long addr)
126 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0));
130 #endif /* !__ASSEMBLY__ */
132 /* to align the pointer to the (next) page boundary */
133 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
135 #define __PAGE_OFFSET 0x0UL
136 #define PAGE_OFFSET 0x0UL
137 #define __pa(x) (unsigned long)(x)
138 #define __va(x) (void *)(unsigned long)(x)
139 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
141 #define pfn_valid(pfn) ((pfn) < max_mapnr)
142 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
144 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
145 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
147 #include <asm-generic/memory_model.h>
148 #include <asm-generic/page.h>
150 #endif /* __KERNEL__ */
152 #endif /* _S390_PAGE_H */