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 12 #include <linux/const.h> 13 #include <asm/types.h> 14 15 /* PAGE_SHIFT determines the page size */ 16 #define PAGE_SHIFT 12 17 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 18 #define PAGE_MASK (~(PAGE_SIZE-1)) 19 #define PAGE_DEFAULT_ACC 0 20 #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) 21 22 #define HPAGE_SHIFT 20 23 #define HPAGE_SIZE (1UL << HPAGE_SHIFT) 24 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 25 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 26 27 #define ARCH_HAS_SETCLEAR_HUGE_PTE 28 #define ARCH_HAS_HUGE_PTE_TYPE 29 #define ARCH_HAS_PREPARE_HUGEPAGE 30 #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH 31 32 #include <asm/setup.h> 33 #ifndef __ASSEMBLY__ 34 35 static inline void clear_page(void *page) 36 { 37 if (MACHINE_HAS_PFMF) { 38 asm volatile( 39 " .insn rre,0xb9af0000,%0,%1" 40 : : "d" (0x10000), "a" (page) : "memory", "cc"); 41 } else { 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 52 static inline void copy_page(void *to, void *from) 53 { 54 if (MACHINE_HAS_MVPG) { 55 register unsigned long reg0 asm ("0") = 0; 56 asm volatile( 57 " mvpg %0,%1" 58 : : "a" (to), "a" (from), "d" (reg0) 59 : "memory", "cc"); 60 } else 61 asm volatile( 62 " mvc 0(256,%0),0(%1)\n" 63 " mvc 256(256,%0),256(%1)\n" 64 " mvc 512(256,%0),512(%1)\n" 65 " mvc 768(256,%0),768(%1)\n" 66 " mvc 1024(256,%0),1024(%1)\n" 67 " mvc 1280(256,%0),1280(%1)\n" 68 " mvc 1536(256,%0),1536(%1)\n" 69 " mvc 1792(256,%0),1792(%1)\n" 70 " mvc 2048(256,%0),2048(%1)\n" 71 " mvc 2304(256,%0),2304(%1)\n" 72 " mvc 2560(256,%0),2560(%1)\n" 73 " mvc 2816(256,%0),2816(%1)\n" 74 " mvc 3072(256,%0),3072(%1)\n" 75 " mvc 3328(256,%0),3328(%1)\n" 76 " mvc 3584(256,%0),3584(%1)\n" 77 " mvc 3840(256,%0),3840(%1)\n" 78 : : "a" (to), "a" (from) : "memory"); 79 } 80 81 #define clear_user_page(page, vaddr, pg) clear_page(page) 82 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 83 84 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ 85 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) 86 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE 87 88 /* 89 * These are used to make use of C type-checking.. 90 */ 91 92 typedef struct { unsigned long pgprot; } pgprot_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 pte_val(x) ((x).pte) 101 #define pmd_val(x) ((x).pmd) 102 #define pud_val(x) ((x).pud) 103 #define pgd_val(x) ((x).pgd) 104 105 #define __pte(x) ((pte_t) { (x) } ) 106 #define __pmd(x) ((pmd_t) { (x) } ) 107 #define __pgd(x) ((pgd_t) { (x) } ) 108 #define __pgprot(x) ((pgprot_t) { (x) } ) 109 110 static inline void 111 page_set_storage_key(unsigned long addr, unsigned int skey) 112 { 113 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); 114 } 115 116 static inline unsigned int 117 page_get_storage_key(unsigned long addr) 118 { 119 unsigned int skey; 120 121 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0)); 122 return skey; 123 } 124 125 struct page; 126 void arch_free_page(struct page *page, int order); 127 void arch_alloc_page(struct page *page, int order); 128 129 #define HAVE_ARCH_FREE_PAGE 130 #define HAVE_ARCH_ALLOC_PAGE 131 132 #endif /* !__ASSEMBLY__ */ 133 134 #define __PAGE_OFFSET 0x0UL 135 #define PAGE_OFFSET 0x0UL 136 #define __pa(x) (unsigned long)(x) 137 #define __va(x) (void *)(unsigned long)(x) 138 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 139 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 140 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 141 142 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ 143 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 144 145 #include <asm-generic/memory_model.h> 146 #include <asm-generic/getorder.h> 147 148 #define __HAVE_ARCH_GATE_AREA 1 149 150 #endif /* _S390_PAGE_H */ 151