1 /* 2 * S390 version 3 * Copyright IBM Corp. 1999, 2000 4 * Author(s): Hartmut Penner (hp@de.ibm.com) 5 */ 6 7 #ifndef _S390_PAGE_H 8 #define _S390_PAGE_H 9 10 #include <linux/const.h> 11 #include <asm/types.h> 12 13 /* PAGE_SHIFT determines the page size */ 14 #define PAGE_SHIFT 12 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) 19 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) 24 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 29 30 #include <asm/setup.h> 31 #ifndef __ASSEMBLY__ 32 33 static inline void storage_key_init_range(unsigned long start, unsigned long end) 34 { 35 #if PAGE_DEFAULT_KEY 36 __storage_key_init_range(start, end); 37 #endif 38 } 39 40 static inline void clear_page(void *page) 41 { 42 register unsigned long reg1 asm ("1") = 0; 43 register void *reg2 asm ("2") = page; 44 register unsigned long reg3 asm ("3") = 4096; 45 asm volatile( 46 " mvcl 2,0" 47 : "+d" (reg2), "+d" (reg3) : "d" (reg1) 48 : "memory", "cc"); 49 } 50 51 static inline void copy_page(void *to, void *from) 52 { 53 if (MACHINE_HAS_MVPG) { 54 register unsigned long reg0 asm ("0") = 0; 55 asm volatile( 56 " mvpg %0,%1" 57 : : "a" (to), "a" (from), "d" (reg0) 58 : "memory", "cc"); 59 } else 60 asm volatile( 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"); 78 } 79 80 #define clear_user_page(page, vaddr, pg) clear_page(page) 81 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 82 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 86 87 /* 88 * These are used to make use of C type-checking.. 89 */ 90 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; 98 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) 105 106 #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) } ) 112 113 static inline void page_set_storage_key(unsigned long addr, 114 unsigned char skey, int mapped) 115 { 116 if (!mapped) 117 asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0" 118 : : "d" (skey), "a" (addr)); 119 else 120 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); 121 } 122 123 static inline unsigned char page_get_storage_key(unsigned long addr) 124 { 125 unsigned char skey; 126 127 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr)); 128 return skey; 129 } 130 131 static inline int page_reset_referenced(unsigned long addr) 132 { 133 unsigned int ipm; 134 135 asm volatile( 136 " rrbe 0,%1\n" 137 " ipm %0\n" 138 : "=d" (ipm) : "a" (addr) : "cc"); 139 return !!(ipm & 0x20000000); 140 } 141 142 /* 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 */ 147 148 struct page; 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); 152 153 static inline int devmem_is_allowed(unsigned long pfn) 154 { 155 return 0; 156 } 157 158 #define HAVE_ARCH_FREE_PAGE 159 #define HAVE_ARCH_ALLOC_PAGE 160 161 #endif /* !__ASSEMBLY__ */ 162 163 #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) 170 171 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ 172 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 173 174 #include <asm-generic/memory_model.h> 175 #include <asm-generic/getorder.h> 176 177 #define __HAVE_ARCH_GATE_AREA 1 178 179 #endif /* _S390_PAGE_H */ 180