diff options
Diffstat (limited to 'include/asm-s390/page.h')
| -rw-r--r-- | include/asm-s390/page.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/include/asm-s390/page.h b/include/asm-s390/page.h new file mode 100644 index 00000000000..614e2a93c70 --- /dev/null +++ b/include/asm-s390/page.h @@ -0,0 +1,208 @@ +/* + * 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 */ |