1c6557e7fSMartin Schwidefsky /* 2c6557e7fSMartin Schwidefsky * S390 version 3a53c8fabSHeiko Carstens * Copyright IBM Corp. 1999, 2000 4c6557e7fSMartin Schwidefsky * Author(s): Hartmut Penner (hp@de.ibm.com) 5c6557e7fSMartin Schwidefsky */ 6c6557e7fSMartin Schwidefsky 7c6557e7fSMartin Schwidefsky #ifndef _S390_PAGE_H 8c6557e7fSMartin Schwidefsky #define _S390_PAGE_H 9c6557e7fSMartin Schwidefsky 10c6557e7fSMartin Schwidefsky #include <linux/const.h> 11c6557e7fSMartin Schwidefsky #include <asm/types.h> 12c6557e7fSMartin Schwidefsky 13c67da7c7SHeiko Carstens #define _PAGE_SHIFT 12 14c67da7c7SHeiko Carstens #define _PAGE_SIZE (_AC(1, UL) << _PAGE_SHIFT) 15c67da7c7SHeiko Carstens #define _PAGE_MASK (~(_PAGE_SIZE - 1)) 16c67da7c7SHeiko Carstens 17c6557e7fSMartin Schwidefsky /* PAGE_SHIFT determines the page size */ 18c67da7c7SHeiko Carstens #define PAGE_SHIFT _PAGE_SHIFT 19c67da7c7SHeiko Carstens #define PAGE_SIZE _PAGE_SIZE 20c67da7c7SHeiko Carstens #define PAGE_MASK _PAGE_MASK 21c6557e7fSMartin Schwidefsky #define PAGE_DEFAULT_ACC 0 22c6557e7fSMartin Schwidefsky #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) 23c6557e7fSMartin Schwidefsky 2441318bfeSDominik Dingel #define HPAGE_SHIFT 20 25c6557e7fSMartin Schwidefsky #define HPAGE_SIZE (1UL << HPAGE_SHIFT) 26c6557e7fSMartin Schwidefsky #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 27c6557e7fSMartin Schwidefsky #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 28d08de8e2SGerald Schaefer #define HUGE_MAX_HSTATE 2 29c6557e7fSMartin Schwidefsky 30c6557e7fSMartin Schwidefsky #define ARCH_HAS_SETCLEAR_HUGE_PTE 31c6557e7fSMartin Schwidefsky #define ARCH_HAS_HUGE_PTE_TYPE 32c6557e7fSMartin Schwidefsky #define ARCH_HAS_PREPARE_HUGEPAGE 33c6557e7fSMartin Schwidefsky #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH 34c6557e7fSMartin Schwidefsky 3541318bfeSDominik Dingel #include <asm/setup.h> 3641318bfeSDominik Dingel #ifndef __ASSEMBLY__ 3741318bfeSDominik Dingel 38de3fa841SHeiko Carstens void __storage_key_init_range(unsigned long start, unsigned long end); 39de3fa841SHeiko Carstens 40127c1fefSMartin Schwidefsky static inline void storage_key_init_range(unsigned long start, unsigned long end) 41127c1fefSMartin Schwidefsky { 42de3fa841SHeiko Carstens if (PAGE_DEFAULT_KEY) 43127c1fefSMartin Schwidefsky __storage_key_init_range(start, end); 44127c1fefSMartin Schwidefsky } 456b70a920SHeiko Carstens 46fb3d1c08SChristian Borntraeger #define clear_page(page) memset((page), 0, PAGE_SIZE) 47c6557e7fSMartin Schwidefsky 48dba6bb60SHeiko Carstens /* 49dba6bb60SHeiko Carstens * copy_page uses the mvcl instruction with 0xb0 padding byte in order to 50dba6bb60SHeiko Carstens * bypass caches when copying a page. Especially when copying huge pages 51dba6bb60SHeiko Carstens * this keeps L1 and L2 data caches alive. 52dba6bb60SHeiko Carstens */ 53c6557e7fSMartin Schwidefsky static inline void copy_page(void *to, void *from) 54c6557e7fSMartin Schwidefsky { 55dba6bb60SHeiko Carstens register void *reg2 asm ("2") = to; 56dba6bb60SHeiko Carstens register unsigned long reg3 asm ("3") = 0x1000; 57dba6bb60SHeiko Carstens register void *reg4 asm ("4") = from; 58dba6bb60SHeiko Carstens register unsigned long reg5 asm ("5") = 0xb0001000; 59c6557e7fSMartin Schwidefsky asm volatile( 60dba6bb60SHeiko Carstens " mvcl 2,4" 61dba6bb60SHeiko Carstens : "+d" (reg2), "+d" (reg3), "+d" (reg4), "+d" (reg5) 62dba6bb60SHeiko Carstens : : "memory", "cc"); 63c6557e7fSMartin Schwidefsky } 64c6557e7fSMartin Schwidefsky 65c6557e7fSMartin Schwidefsky #define clear_user_page(page, vaddr, pg) clear_page(page) 66c6557e7fSMartin Schwidefsky #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 67c6557e7fSMartin Schwidefsky 68c6557e7fSMartin Schwidefsky #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ 69c6557e7fSMartin Schwidefsky alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) 70c6557e7fSMartin Schwidefsky #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE 71c6557e7fSMartin Schwidefsky 72c6557e7fSMartin Schwidefsky /* 73c6557e7fSMartin Schwidefsky * These are used to make use of C type-checking.. 74c6557e7fSMartin Schwidefsky */ 75c6557e7fSMartin Schwidefsky 76c6557e7fSMartin Schwidefsky typedef struct { unsigned long pgprot; } pgprot_t; 77b2fa47e6SMartin Schwidefsky typedef struct { unsigned long pgste; } pgste_t; 78c6557e7fSMartin Schwidefsky typedef struct { unsigned long pte; } pte_t; 79c6557e7fSMartin Schwidefsky typedef struct { unsigned long pmd; } pmd_t; 80c6557e7fSMartin Schwidefsky typedef struct { unsigned long pud; } pud_t; 811aea9b3fSMartin Schwidefsky typedef struct { unsigned long p4d; } p4d_t; 82c6557e7fSMartin Schwidefsky typedef struct { unsigned long pgd; } pgd_t; 83c6557e7fSMartin Schwidefsky typedef pte_t *pgtable_t; 84c6557e7fSMartin Schwidefsky 85c6557e7fSMartin Schwidefsky #define pgprot_val(x) ((x).pgprot) 86b2fa47e6SMartin Schwidefsky #define pgste_val(x) ((x).pgste) 87c6557e7fSMartin Schwidefsky #define pte_val(x) ((x).pte) 88c6557e7fSMartin Schwidefsky #define pmd_val(x) ((x).pmd) 89c6557e7fSMartin Schwidefsky #define pud_val(x) ((x).pud) 901aea9b3fSMartin Schwidefsky #define p4d_val(x) ((x).p4d) 91c6557e7fSMartin Schwidefsky #define pgd_val(x) ((x).pgd) 92c6557e7fSMartin Schwidefsky 93b2fa47e6SMartin Schwidefsky #define __pgste(x) ((pgste_t) { (x) } ) 94c6557e7fSMartin Schwidefsky #define __pte(x) ((pte_t) { (x) } ) 95c6557e7fSMartin Schwidefsky #define __pmd(x) ((pmd_t) { (x) } ) 96b2fa47e6SMartin Schwidefsky #define __pud(x) ((pud_t) { (x) } ) 971aea9b3fSMartin Schwidefsky #define __p4d(x) ((p4d_t) { (x) } ) 98c6557e7fSMartin Schwidefsky #define __pgd(x) ((pgd_t) { (x) } ) 99c6557e7fSMartin Schwidefsky #define __pgprot(x) ((pgprot_t) { (x) } ) 100c6557e7fSMartin Schwidefsky 1012d42552dSMartin Schwidefsky static inline void page_set_storage_key(unsigned long addr, 1022d42552dSMartin Schwidefsky unsigned char skey, int mapped) 103c6557e7fSMartin Schwidefsky { 104e2b8d7afSMartin Schwidefsky if (!mapped) 105e2b8d7afSMartin Schwidefsky asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0" 106e2b8d7afSMartin Schwidefsky : : "d" (skey), "a" (addr)); 107e2b8d7afSMartin Schwidefsky else 108c6557e7fSMartin Schwidefsky asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); 109c6557e7fSMartin Schwidefsky } 110c6557e7fSMartin Schwidefsky 1112d42552dSMartin Schwidefsky static inline unsigned char page_get_storage_key(unsigned long addr) 112c6557e7fSMartin Schwidefsky { 1132d42552dSMartin Schwidefsky unsigned char skey; 114c6557e7fSMartin Schwidefsky 1152d42552dSMartin Schwidefsky asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr)); 116c6557e7fSMartin Schwidefsky return skey; 117c6557e7fSMartin Schwidefsky } 118c6557e7fSMartin Schwidefsky 1192d42552dSMartin Schwidefsky static inline int page_reset_referenced(unsigned long addr) 1202d42552dSMartin Schwidefsky { 121a7e19ab5SDavid Hildenbrand int cc; 1222d42552dSMartin Schwidefsky 1232d42552dSMartin Schwidefsky asm volatile( 1242d42552dSMartin Schwidefsky " rrbe 0,%1\n" 1252d42552dSMartin Schwidefsky " ipm %0\n" 126a7e19ab5SDavid Hildenbrand " srl %0,28\n" 127a7e19ab5SDavid Hildenbrand : "=d" (cc) : "a" (addr) : "cc"); 128a7e19ab5SDavid Hildenbrand return cc; 1292d42552dSMartin Schwidefsky } 1302d42552dSMartin Schwidefsky 1312d42552dSMartin Schwidefsky /* Bits int the storage key */ 1322d42552dSMartin Schwidefsky #define _PAGE_CHANGED 0x02 /* HW changed bit */ 1332d42552dSMartin Schwidefsky #define _PAGE_REFERENCED 0x04 /* HW referenced bit */ 1342d42552dSMartin Schwidefsky #define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */ 1352d42552dSMartin Schwidefsky #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */ 1362d42552dSMartin Schwidefsky 137c6557e7fSMartin Schwidefsky struct page; 138c6557e7fSMartin Schwidefsky void arch_free_page(struct page *page, int order); 139c6557e7fSMartin Schwidefsky void arch_alloc_page(struct page *page, int order); 140c9b5ad54SMartin Schwidefsky void arch_set_page_dat(struct page *page, int order); 141c9b5ad54SMartin Schwidefsky void arch_set_page_nodat(struct page *page, int order); 142c9b5ad54SMartin Schwidefsky int arch_test_page_nodat(struct page *page); 143638ad34aSMartin Schwidefsky void arch_set_page_states(int make_stable); 144c6557e7fSMartin Schwidefsky 145ec6743bbSHendrik Brueckner static inline int devmem_is_allowed(unsigned long pfn) 146ec6743bbSHendrik Brueckner { 147ec6743bbSHendrik Brueckner return 0; 148ec6743bbSHendrik Brueckner } 149ec6743bbSHendrik Brueckner 150c6557e7fSMartin Schwidefsky #define HAVE_ARCH_FREE_PAGE 151c6557e7fSMartin Schwidefsky #define HAVE_ARCH_ALLOC_PAGE 152c6557e7fSMartin Schwidefsky 153c6557e7fSMartin Schwidefsky #endif /* !__ASSEMBLY__ */ 154c6557e7fSMartin Schwidefsky 155c6557e7fSMartin Schwidefsky #define __PAGE_OFFSET 0x0UL 156c6557e7fSMartin Schwidefsky #define PAGE_OFFSET 0x0UL 157c6557e7fSMartin Schwidefsky #define __pa(x) (unsigned long)(x) 158c6557e7fSMartin Schwidefsky #define __va(x) (void *)(unsigned long)(x) 159c6557e7fSMartin Schwidefsky #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 160c6557e7fSMartin Schwidefsky #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) 161c6557e7fSMartin Schwidefsky #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 1623d84683bSDavid Hildenbrand #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 1633d84683bSDavid Hildenbrand #define page_to_virt(page) pfn_to_virt(page_to_pfn(page)) 164c6557e7fSMartin Schwidefsky 165c6557e7fSMartin Schwidefsky #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ 166c6557e7fSMartin Schwidefsky VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 167c6557e7fSMartin Schwidefsky 168c6557e7fSMartin Schwidefsky #include <asm-generic/memory_model.h> 1695b17e1cdSArnd Bergmann #include <asm-generic/getorder.h> 170c6557e7fSMartin Schwidefsky 171c6557e7fSMartin Schwidefsky #endif /* _S390_PAGE_H */ 172