2 * include/asm-s390/page.h
5 * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Hartmut Penner (hpenner@de.ibm.com)
12 #include <asm/setup.h>
14 /* PAGE_SHIFT determines the page size */
16 #define PAGE_SIZE (1UL << PAGE_SHIFT)
17 #define PAGE_MASK (~(PAGE_SIZE-1))
22 static inline void clear_page(void *page)
24 asm volatile (" lgr 2,%0\n"
28 : : "a" ((void *) (page))
29 : "memory", "cc", "1", "2", "3" );
32 static inline void copy_page(void *to, void *from)
35 asm volatile (" sgr 0,0\n"
37 : : "a" ((void *)(to)), "a" ((void *)(from))
38 : "memory", "cc", "0" );
40 asm volatile (" mvc 0(256,%0),0(%1)\n"
41 " mvc 256(256,%0),256(%1)\n"
42 " mvc 512(256,%0),512(%1)\n"
43 " mvc 768(256,%0),768(%1)\n"
44 " mvc 1024(256,%0),1024(%1)\n"
45 " mvc 1280(256,%0),1280(%1)\n"
46 " mvc 1536(256,%0),1536(%1)\n"
47 " mvc 1792(256,%0),1792(%1)\n"
48 " mvc 2048(256,%0),2048(%1)\n"
49 " mvc 2304(256,%0),2304(%1)\n"
50 " mvc 2560(256,%0),2560(%1)\n"
51 " mvc 2816(256,%0),2816(%1)\n"
52 " mvc 3072(256,%0),3072(%1)\n"
53 " mvc 3328(256,%0),3328(%1)\n"
54 " mvc 3584(256,%0),3584(%1)\n"
55 " mvc 3840(256,%0),3840(%1)\n"
56 : : "a"((void *)(to)),"a"((void *)(from))
60 #define clear_user_page(page, vaddr) clear_page(page)
61 #define copy_user_page(to, from, vaddr) copy_page(to, from)
64 printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
65 __asm__ __volatile__(".long 0"); \
68 #define PAGE_BUG(page) do { \
72 /* Pure 2^n version of get_order */
73 extern __inline__ int get_order(unsigned long size)
77 size = (size-1) >> (PAGE_SHIFT-1);
87 * These are used to make use of C type-checking..
89 typedef struct { unsigned long pte; } pte_t;
94 typedef unsigned int pgd_t;
95 typedef struct { unsigned long pgprot; } pgprot_t;
97 #define pte_val(x) ((x).pte)
98 #define pmd_val(x) ((x).pmd0)
99 #define pmd_val1(x) ((x).pmd1)
101 static inline unsigned long __pgd_val(pgd_t *pgdp)
103 unsigned long addr = (unsigned long) pgdp;
104 unsigned long *pgd_slot = (unsigned long *) (addr & -8);
106 return *pgd_slot + ((addr & 4) << 11);
108 #define pgd_val(pgd) __pgd_val(&(pgd))
110 #define pgprot_val(x) ((x).pgprot)
112 #define __pte(x) ((pte_t) { (x) } )
113 #define __pmd(x) ((pmd_t) { (x) } )
114 #define __pgd(x) ((pgd_t) { (x) } )
115 #define __pgprot(x) ((pgprot_t) { (x) } )
117 #endif /* !__ASSEMBLY__ */
119 /* to align the pointer to the (next) page boundary */
120 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
122 #define __PAGE_OFFSET 0x0UL
123 #define PAGE_OFFSET 0x0UL
124 #define __pa(x) (unsigned long)(x)
125 #define __va(x) (void *)(x)
126 #define virt_to_page(kaddr) (mem_map + (__pa(kaddr) >> PAGE_SHIFT))
127 #define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
129 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
130 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
132 #define get_storage_key() 0
133 #define pfix_get_page_addr(addr) (unsigned long)addr
134 #define pfix_get_addr(addr) (unsigned long)addr
136 #endif /* __KERNEL__ */
138 #endif /* _S390_PAGE_H */