Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * include/asm-s390/page.h |
| 3 | * |
| 4 | * S390 version |
| 5 | * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| 6 | * Author(s): Hartmut Penner (hp@de.ibm.com) |
| 7 | */ |
| 8 | |
| 9 | #ifndef _S390_PAGE_H |
| 10 | #define _S390_PAGE_H |
| 11 | |
Sam Ravnborg | 52480ee | 2007-10-12 16:11:50 +0200 | [diff] [blame] | 12 | #include <linux/const.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <asm/types.h> |
| 14 | |
| 15 | /* PAGE_SHIFT determines the page size */ |
| 16 | #define PAGE_SHIFT 12 |
Sam Ravnborg | 52480ee | 2007-10-12 16:11:50 +0200 | [diff] [blame] | 17 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
Peter Oberparleiter | 0b642ed | 2005-05-01 08:58:58 -0700 | [diff] [blame] | 19 | #define PAGE_DEFAULT_ACC 0 |
| 20 | #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
| 22 | #ifdef __KERNEL__ |
David Woodhouse | 274f594 | 2006-04-27 04:47:10 +0100 | [diff] [blame] | 23 | #include <asm/setup.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #ifndef __ASSEMBLY__ |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | static inline void clear_page(void *page) |
| 27 | { |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 28 | register unsigned long reg1 asm ("1") = 0; |
| 29 | register void *reg2 asm ("2") = page; |
| 30 | register unsigned long reg3 asm ("3") = 4096; |
| 31 | asm volatile( |
| 32 | " mvcl 2,0" |
| 33 | : "+d" (reg2), "+d" (reg3) : "d" (reg1) : "memory", "cc"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | } |
| 35 | |
| 36 | static inline void copy_page(void *to, void *from) |
| 37 | { |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 38 | if (MACHINE_HAS_MVPG) { |
| 39 | register unsigned long reg0 asm ("0") = 0; |
| 40 | asm volatile( |
| 41 | " mvpg %0,%1" |
| 42 | : : "a" (to), "a" (from), "d" (reg0) |
| 43 | : "memory", "cc"); |
| 44 | } else |
| 45 | asm volatile( |
| 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"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | } |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #define clear_user_page(page, vaddr, pg) clear_page(page) |
| 66 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) |
| 67 | |
Mel Gorman | 769848c | 2007-07-17 04:03:05 -0700 | [diff] [blame] | 68 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ |
| 69 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE |
| 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | /* |
| 73 | * These are used to make use of C type-checking.. |
| 74 | */ |
| 75 | |
| 76 | typedef struct { unsigned long pgprot; } pgprot_t; |
| 77 | typedef struct { unsigned long pte; } pte_t; |
| 78 | |
| 79 | #define pte_val(x) ((x).pte) |
| 80 | #define pgprot_val(x) ((x).pgprot) |
| 81 | |
| 82 | #ifndef __s390x__ |
| 83 | |
| 84 | typedef struct { unsigned long pmd; } pmd_t; |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame^] | 85 | typedef struct { unsigned long pud; } pud_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | typedef struct { |
| 87 | unsigned long pgd0; |
| 88 | unsigned long pgd1; |
| 89 | unsigned long pgd2; |
| 90 | unsigned long pgd3; |
| 91 | } pgd_t; |
| 92 | |
| 93 | #define pmd_val(x) ((x).pmd) |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame^] | 94 | #define pud_val(x) ((x).pud) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | #define pgd_val(x) ((x).pgd0) |
| 96 | |
| 97 | #else /* __s390x__ */ |
| 98 | |
| 99 | typedef struct { |
| 100 | unsigned long pmd0; |
| 101 | unsigned long pmd1; |
| 102 | } pmd_t; |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame^] | 103 | typedef struct { unsigned long pud; } pud_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | typedef struct { unsigned long pgd; } pgd_t; |
| 105 | |
| 106 | #define pmd_val(x) ((x).pmd0) |
| 107 | #define pmd_val1(x) ((x).pmd1) |
Martin Schwidefsky | 190a1d7 | 2007-10-22 12:52:48 +0200 | [diff] [blame^] | 108 | #define pud_val(x) ((x).pud) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | #define pgd_val(x) ((x).pgd) |
| 110 | |
| 111 | #endif /* __s390x__ */ |
| 112 | |
| 113 | #define __pte(x) ((pte_t) { (x) } ) |
| 114 | #define __pmd(x) ((pmd_t) { (x) } ) |
| 115 | #define __pgd(x) ((pgd_t) { (x) } ) |
| 116 | #define __pgprot(x) ((pgprot_t) { (x) } ) |
| 117 | |
| 118 | /* default storage key used for all pages */ |
| 119 | extern unsigned int default_storage_key; |
| 120 | |
| 121 | static inline void |
| 122 | page_set_storage_key(unsigned long addr, unsigned int skey) |
| 123 | { |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 124 | asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | static inline unsigned int |
| 128 | page_get_storage_key(unsigned long addr) |
| 129 | { |
| 130 | unsigned int skey; |
| 131 | |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 132 | asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | return skey; |
| 134 | } |
| 135 | |
Heiko Carstens | f4eb07c | 2006-12-08 15:56:07 +0100 | [diff] [blame] | 136 | extern unsigned long max_pfn; |
| 137 | |
| 138 | static inline int pfn_valid(unsigned long pfn) |
| 139 | { |
| 140 | unsigned long dummy; |
| 141 | int ccode; |
| 142 | |
| 143 | if (pfn >= max_pfn) |
| 144 | return 0; |
| 145 | |
| 146 | asm volatile( |
| 147 | " lra %0,0(%2)\n" |
| 148 | " ipm %1\n" |
| 149 | " srl %1,28\n" |
| 150 | : "=d" (dummy), "=d" (ccode) |
| 151 | : "a" (pfn << PAGE_SHIFT) |
| 152 | : "cc"); |
| 153 | return !ccode; |
| 154 | } |
| 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | #endif /* !__ASSEMBLY__ */ |
| 157 | |
| 158 | /* to align the pointer to the (next) page boundary */ |
| 159 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) |
| 160 | |
| 161 | #define __PAGE_OFFSET 0x0UL |
| 162 | #define PAGE_OFFSET 0x0UL |
| 163 | #define __pa(x) (unsigned long)(x) |
| 164 | #define __va(x) (void *)(unsigned long)(x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
Heiko Carstens | 0b2b6e1 | 2006-10-04 20:02:23 +0200 | [diff] [blame] | 166 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
| 168 | |
| 169 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |
| 170 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| 171 | |
KAMEZAWA Hiroyuki | aed6304 | 2006-03-27 01:15:45 -0800 | [diff] [blame] | 172 | #include <asm-generic/memory_model.h> |
Stephen Rothwell | fd4fd5a | 2005-09-03 15:54:30 -0700 | [diff] [blame] | 173 | #include <asm-generic/page.h> |
| 174 | |
David Woodhouse | 274f594 | 2006-04-27 04:47:10 +0100 | [diff] [blame] | 175 | #endif /* __KERNEL__ */ |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | #endif /* _S390_PAGE_H */ |