3 * Copyright IBM Corp. 1999, 2000
4 * Author(s): Hartmut Penner (hp@de.ibm.com)
10 #include <linux/const.h>
11 #include <asm/types.h>
13 /* PAGE_SHIFT determines the page size */
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)
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)
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
30 #include <asm/setup.h>
33 void storage_key_init_range(unsigned long start, unsigned long end);
35 static inline unsigned long pfmf(unsigned long function, unsigned long address)
38 " .insn rre,0xb9af0000,%[function],%[address]"
39 : [address] "+a" (address)
40 : [function] "d" (function)
45 static inline void clear_page(void *page)
47 register unsigned long reg1 asm ("1") = 0;
48 register void *reg2 asm ("2") = page;
49 register unsigned long reg3 asm ("3") = 4096;
52 : "+d" (reg2), "+d" (reg3) : "d" (reg1)
56 static inline void copy_page(void *to, void *from)
58 if (MACHINE_HAS_MVPG) {
59 register unsigned long reg0 asm ("0") = 0;
62 : : "a" (to), "a" (from), "d" (reg0)
66 " mvc 0(256,%0),0(%1)\n"
67 " mvc 256(256,%0),256(%1)\n"
68 " mvc 512(256,%0),512(%1)\n"
69 " mvc 768(256,%0),768(%1)\n"
70 " mvc 1024(256,%0),1024(%1)\n"
71 " mvc 1280(256,%0),1280(%1)\n"
72 " mvc 1536(256,%0),1536(%1)\n"
73 " mvc 1792(256,%0),1792(%1)\n"
74 " mvc 2048(256,%0),2048(%1)\n"
75 " mvc 2304(256,%0),2304(%1)\n"
76 " mvc 2560(256,%0),2560(%1)\n"
77 " mvc 2816(256,%0),2816(%1)\n"
78 " mvc 3072(256,%0),3072(%1)\n"
79 " mvc 3328(256,%0),3328(%1)\n"
80 " mvc 3584(256,%0),3584(%1)\n"
81 " mvc 3840(256,%0),3840(%1)\n"
82 : : "a" (to), "a" (from) : "memory");
85 #define clear_user_page(page, vaddr, pg) clear_page(page)
86 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
88 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
89 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
90 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
93 * These are used to make use of C type-checking..
96 typedef struct { unsigned long pgprot; } pgprot_t;
97 typedef struct { unsigned long pgste; } pgste_t;
98 typedef struct { unsigned long pte; } pte_t;
99 typedef struct { unsigned long pmd; } pmd_t;
100 typedef struct { unsigned long pud; } pud_t;
101 typedef struct { unsigned long pgd; } pgd_t;
102 typedef pte_t *pgtable_t;
104 #define pgprot_val(x) ((x).pgprot)
105 #define pgste_val(x) ((x).pgste)
106 #define pte_val(x) ((x).pte)
107 #define pmd_val(x) ((x).pmd)
108 #define pud_val(x) ((x).pud)
109 #define pgd_val(x) ((x).pgd)
111 #define __pgste(x) ((pgste_t) { (x) } )
112 #define __pte(x) ((pte_t) { (x) } )
113 #define __pmd(x) ((pmd_t) { (x) } )
114 #define __pud(x) ((pud_t) { (x) } )
115 #define __pgd(x) ((pgd_t) { (x) } )
116 #define __pgprot(x) ((pgprot_t) { (x) } )
118 static inline void page_set_storage_key(unsigned long addr,
119 unsigned char skey, int mapped)
122 asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0"
123 : : "d" (skey), "a" (addr));
125 asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
128 static inline unsigned char page_get_storage_key(unsigned long addr)
132 asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr));
136 static inline int page_reset_referenced(unsigned long addr)
143 : "=d" (ipm) : "a" (addr) : "cc");
144 return !!(ipm & 0x20000000);
147 /* Bits int the storage key */
148 #define _PAGE_CHANGED 0x02 /* HW changed bit */
149 #define _PAGE_REFERENCED 0x04 /* HW referenced bit */
150 #define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */
151 #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */
154 * Test and clear referenced bit in storage key.
156 #define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_YOUNG
157 static inline int page_test_and_clear_young(unsigned long pfn)
159 return page_reset_referenced(pfn << PAGE_SHIFT);
163 void arch_free_page(struct page *page, int order);
164 void arch_alloc_page(struct page *page, int order);
165 void arch_set_page_states(int make_stable);
167 static inline int devmem_is_allowed(unsigned long pfn)
172 #define HAVE_ARCH_FREE_PAGE
173 #define HAVE_ARCH_ALLOC_PAGE
175 #endif /* !__ASSEMBLY__ */
177 #define __PAGE_OFFSET 0x0UL
178 #define PAGE_OFFSET 0x0UL
179 #define __pa(x) (unsigned long)(x)
180 #define __va(x) (void *)(unsigned long)(x)
181 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
182 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
183 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
185 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
186 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
188 #include <asm-generic/memory_model.h>
189 #include <asm-generic/getorder.h>
191 #define __HAVE_ARCH_GATE_AREA 1
193 #endif /* _S390_PAGE_H */