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/setup.h>
13 #include <asm/types.h>
15 /* PAGE_SHIFT determines the page size */
17 #define PAGE_SIZE (1UL << PAGE_SHIFT)
18 #define PAGE_MASK (~(PAGE_SIZE-1))
25 static inline void clear_page(void *page)
29 rp.subreg.even = (unsigned long) page;
30 rp.subreg.odd = (unsigned long) 4096;
31 asm volatile (" slr 1,1\n"
33 : "+&a" (rp) : : "memory", "cc", "1" );
36 static inline void copy_page(void *to, void *from)
39 asm volatile (" sr 0,0\n"
41 : : "a" ((void *)(to)), "a" ((void *)(from))
42 : "memory", "cc", "0" );
44 asm volatile (" mvc 0(256,%0),0(%1)\n"
45 " mvc 256(256,%0),256(%1)\n"
46 " mvc 512(256,%0),512(%1)\n"
47 " mvc 768(256,%0),768(%1)\n"
48 " mvc 1024(256,%0),1024(%1)\n"
49 " mvc 1280(256,%0),1280(%1)\n"
50 " mvc 1536(256,%0),1536(%1)\n"
51 " mvc 1792(256,%0),1792(%1)\n"
52 " mvc 2048(256,%0),2048(%1)\n"
53 " mvc 2304(256,%0),2304(%1)\n"
54 " mvc 2560(256,%0),2560(%1)\n"
55 " mvc 2816(256,%0),2816(%1)\n"
56 " mvc 3072(256,%0),3072(%1)\n"
57 " mvc 3328(256,%0),3328(%1)\n"
58 " mvc 3584(256,%0),3584(%1)\n"
59 " mvc 3840(256,%0),3840(%1)\n"
60 : : "a"((void *)(to)),"a"((void *)(from))
66 static inline void clear_page(void *page)
68 asm volatile (" lgr 2,%0\n"
72 : : "a" ((void *) (page))
73 : "memory", "cc", "1", "2", "3" );
76 static inline void copy_page(void *to, void *from)
79 asm volatile (" sgr 0,0\n"
81 : : "a" ((void *)(to)), "a" ((void *)(from))
82 : "memory", "cc", "0" );
84 asm volatile (" mvc 0(256,%0),0(%1)\n"
85 " mvc 256(256,%0),256(%1)\n"
86 " mvc 512(256,%0),512(%1)\n"
87 " mvc 768(256,%0),768(%1)\n"
88 " mvc 1024(256,%0),1024(%1)\n"
89 " mvc 1280(256,%0),1280(%1)\n"
90 " mvc 1536(256,%0),1536(%1)\n"
91 " mvc 1792(256,%0),1792(%1)\n"
92 " mvc 2048(256,%0),2048(%1)\n"
93 " mvc 2304(256,%0),2304(%1)\n"
94 " mvc 2560(256,%0),2560(%1)\n"
95 " mvc 2816(256,%0),2816(%1)\n"
96 " mvc 3072(256,%0),3072(%1)\n"
97 " mvc 3328(256,%0),3328(%1)\n"
98 " mvc 3584(256,%0),3584(%1)\n"
99 " mvc 3840(256,%0),3840(%1)\n"
100 : : "a"((void *)(to)),"a"((void *)(from))
104 #endif /* __s390x__ */
106 #define clear_user_page(page, vaddr, pg) clear_page(page)
107 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
109 /* Pure 2^n version of get_order */
110 extern __inline__ int get_order(unsigned long size)
114 size = (size-1) >> (PAGE_SHIFT-1);
124 * These are used to make use of C type-checking..
127 typedef struct { unsigned long pgprot; } pgprot_t;
128 typedef struct { unsigned long pte; } pte_t;
130 #define pte_val(x) ((x).pte)
131 #define pgprot_val(x) ((x).pgprot)
135 typedef struct { unsigned long pmd; } pmd_t;
143 #define pmd_val(x) ((x).pmd)
144 #define pgd_val(x) ((x).pgd0)
146 #else /* __s390x__ */
152 typedef struct { unsigned long pgd; } pgd_t;
154 #define pmd_val(x) ((x).pmd0)
155 #define pmd_val1(x) ((x).pmd1)
156 #define pgd_val(x) ((x).pgd)
158 #endif /* __s390x__ */
160 #define __pte(x) ((pte_t) { (x) } )
161 #define __pmd(x) ((pmd_t) { (x) } )
162 #define __pgd(x) ((pgd_t) { (x) } )
163 #define __pgprot(x) ((pgprot_t) { (x) } )
165 /* default storage key used for all pages */
166 extern unsigned int default_storage_key;
169 page_set_storage_key(unsigned long addr, unsigned int skey)
171 asm volatile ( "sske %0,%1" : : "d" (skey), "a" (addr) );
174 static inline unsigned int
175 page_get_storage_key(unsigned long addr)
179 asm volatile ( "iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0) );
184 #endif /* !__ASSEMBLY__ */
186 /* to align the pointer to the (next) page boundary */
187 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
189 #define __PAGE_OFFSET 0x0UL
190 #define PAGE_OFFSET 0x0UL
191 #define __pa(x) (unsigned long)(x)
192 #define __va(x) (void *)(unsigned long)(x)
193 #define pfn_to_page(pfn) (mem_map + (pfn))
194 #define page_to_pfn(page) ((unsigned long)((page) - mem_map))
195 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
197 #define pfn_valid(pfn) ((pfn) < max_mapnr)
198 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
200 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
201 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
203 #endif /* __KERNEL__ */
205 #endif /* _S390_PAGE_H */