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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-s390/] [page.h] - Rev 1765
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/* * 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__ 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" ); } #define clear_user_page(page, vaddr) clear_page(page) #define copy_user_page(to, from, vaddr) copy_page(to, from) #define BUG() do { \ printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ __asm__ __volatile__(".long 0"); \ } while (0) #define PAGE_BUG(page) do { \ BUG(); \ } while (0) /* 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 pte; } pte_t; typedef struct { unsigned long pmd; } pmd_t; typedef struct { unsigned long pgd0; unsigned long pgd1; unsigned long pgd2; unsigned long pgd3; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pte_val(x) ((x).pte) #define pmd_val(x) ((x).pmd) #define pgd_val(x) ((x).pgd0) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) #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 *)(x) #define virt_to_page(kaddr) (mem_map + (__pa(kaddr) >> PAGE_SHIFT)) #define VALID_PAGE(page) ((page - mem_map) < max_mapnr) #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) unsigned int get_storage_key(void); unsigned long pfix_get_page_addr(void *); unsigned long pfix_get_addr(void *); #endif /* __KERNEL__ */ #endif /* _S390_PAGE_H */