/* * include/asm-s390/page.h * * S390 version * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation * Author(s): Hartmut Penner (hp@de.ibm.com) */ #ifndef _S390_PAGE_H #define _S390_PAGE_H #include <asm/setup.h> #include <asm/types.h> /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT 12 #define PAGE_SIZE (1UL << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #ifdef __KERNEL__ #ifndef __ASSEMBLY__ #ifndef __s390x__ static inline void clear_page(void *page) { register_pair rp; rp.subreg.even = (unsigned long) page; rp.subreg.odd = (unsigned long) 4096; asm volatile (" slr 1,1\n" " mvcl %0,0" : "+&a" (rp) : : "memory", "cc", "1" ); } static inline void copy_page(void *to, void *from) { if (MACHINE_HAS_MVPG) asm volatile (" sr 0,0\n" " mvpg %0,%1" : : "a" ((void *)(to)), "a" ((void *)(from)) : "memory", "cc", "0" ); else asm volatile (" mvc 0(256,%0),0(%1)\n" " mvc 256(256,%0),256(%1)\n" " mvc 512(256,%0),512(%1)\n" " mvc 768(256,%0),768(%1)\n" " mvc 1024(256,%0),1024(%1)\n" " mvc 1280(256,%0),1280(%1)\n" " mvc 1536(256,%0),1536(%1)\n" " mvc 1792(256,%0),1792(%1)\n" " mvc 2048(256,%0),2048(%1)\n" " mvc 2304(256,%0),2304(%1)\n" " mvc 2560(256,%0),2560(%1)\n" " mvc 2816(256,%0),2816(%1)\n" " mvc 3072(256,%0),3072(%1)\n" " mvc 3328(256,%0),3328(%1)\n" " mvc 3584(256,%0),3584(%1)\n" " mvc 3840(256,%0),3840(%1)\n" : : "a"((void *)(to)),"a"((void *)(from)) : "memory" ); } #else /* __s390x__ */ static inline void clear_page(void *page) { asm volatile (" lgr 2,%0\n" " lghi 3,4096\n" " slgr 1,1\n" " mvcl 2,0" : : "a" ((void *) (page)) : "memory", "cc", "1", "2", "3" ); } static inline void copy_page(void *to, void *from) { if (MACHINE_HAS_MVPG) asm volatile (" sgr 0,0\n" " mvpg %0,%1" : : "a" ((void *)(to)), "a" ((void *)(from)) : "memory", "cc", "0" ); else asm volatile (" mvc 0(256,%0),0(%1)\n" " mvc 256(256,%0),256(%1)\n" " mvc 512(256,%0),512(%1)\n" " mvc 768(256,%0),768(%1)\n" " mvc 1024(256,%0),1024(%1)\n" " mvc 1280(256,%0),1280(%1)\n" " mvc 1536(256,%0),1536(%1)\n" " mvc 1792(256,%0),1792(%1)\n" " mvc 2048(256,%0),2048(%1)\n" " mvc 2304(256,%0),2304(%1)\n" " mvc 2560(256,%0),2560(%1)\n" " mvc 2816(256,%0),2816(%1)\n" " mvc 3072(256,%0),3072(%1)\n" " mvc 3328(256,%0),3328(%1)\n" " mvc 3584(256,%0),3584(%1)\n" " mvc 3840(256,%0),3840(%1)\n" : : "a"((void *)(to)),"a"((void *)(from)) : "memory" ); } #endif /* __s390x__ */ #define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE /* Pure 2^n version of get_order */ extern __inline__ int get_order(unsigned long size) { int order; size = (size-1) >> (PAGE_SHIFT-1); order = -1; do { size >>= 1; order++; } while (size); return order; } /* * These are used to make use of C type-checking.. */ typedef struct { unsigned long pgprot; } pgprot_t; typedef struct { unsigned long pte; } pte_t; #define pte_val(x) ((x).pte) #define pgprot_val(x) ((x).pgprot) #ifndef __s390x__ typedef struct { unsigned long pmd; } pmd_t; typedef struct { unsigned long pgd0; unsigned long pgd1; unsigned long pgd2; unsigned long pgd3; } pgd_t; #define pmd_val(x) ((x).pmd) #define pgd_val(x) ((x).pgd0) #else /* __s390x__ */ typedef struct { unsigned long pmd0; unsigned long pmd1; } pmd_t; typedef struct { unsigned long pgd; } pgd_t; #define pmd_val(x) ((x).pmd0) #define pmd_val1(x) ((x).pmd1) #define pgd_val(x) ((x).pgd) #endif /* __s390x__ */ #define __pte(x) ((pte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) /* default storage key used for all pages */ extern unsigned int default_storage_key; static inline void page_set_storage_key(unsigned long addr, unsigned int skey) { asm volatile ( "sske %0,%1" : : "d" (skey), "a" (addr) ); } static inline unsigned int page_get_storage_key(unsigned long addr) { unsigned int skey; asm volatile ( "iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0) ); return skey; } #endif /* !__ASSEMBLY__ */ /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) #define __PAGE_OFFSET 0x0UL #define PAGE_OFFSET 0x0UL #define __pa(x) (unsigned long)(x) #define __va(x) (void *)(unsigned long)(x) #define pfn_to_page(pfn) (mem_map + (pfn)) #define page_to_pfn(page) ((unsigned long)((page) - mem_map)) #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #define pfn_valid(pfn) ((pfn) < max_mapnr) #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #endif /* __KERNEL__ */ #endif /* _S390_PAGE_H */