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