| /* |
| * 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 <linux/const.h> |
| #include <asm/types.h> |
| |
| /* PAGE_SHIFT determines the page size */ |
| #define PAGE_SHIFT 12 |
| #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
| #define PAGE_MASK (~(PAGE_SIZE-1)) |
| #define PAGE_DEFAULT_ACC 0 |
| #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) |
| |
| #define HPAGE_SHIFT 20 |
| #define HPAGE_SIZE (1UL << HPAGE_SHIFT) |
| #define HPAGE_MASK (~(HPAGE_SIZE - 1)) |
| #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) |
| |
| #define ARCH_HAS_SETCLEAR_HUGE_PTE |
| #define ARCH_HAS_HUGE_PTE_TYPE |
| #define ARCH_HAS_PREPARE_HUGEPAGE |
| #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH |
| |
| #include <asm/setup.h> |
| #ifndef __ASSEMBLY__ |
| |
| static inline void clear_page(void *page) |
| { |
| if (MACHINE_HAS_PFMF) { |
| asm volatile( |
| " .insn rre,0xb9af0000,%0,%1" |
| : : "d" (0x10000), "a" (page) : "memory", "cc"); |
| } else { |
| register unsigned long reg1 asm ("1") = 0; |
| register void *reg2 asm ("2") = page; |
| register unsigned long reg3 asm ("3") = 4096; |
| asm volatile( |
| " mvcl 2,0" |
| : "+d" (reg2), "+d" (reg3) : "d" (reg1) |
| : "memory", "cc"); |
| } |
| } |
| |
| static inline void copy_page(void *to, void *from) |
| { |
| if (MACHINE_HAS_MVPG) { |
| register unsigned long reg0 asm ("0") = 0; |
| asm volatile( |
| " mvpg %0,%1" |
| : : "a" (to), "a" (from), "d" (reg0) |
| : "memory", "cc"); |
| } 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" (to), "a" (from) : "memory"); |
| } |
| |
| #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(movableflags, vma, vaddr) \ |
| alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) |
| #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE |
| |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| |
| typedef struct { unsigned long pgprot; } pgprot_t; |
| typedef struct { unsigned long pte; } pte_t; |
| typedef struct { unsigned long pmd; } pmd_t; |
| typedef struct { unsigned long pud; } pud_t; |
| typedef struct { unsigned long pgd; } pgd_t; |
| typedef pte_t *pgtable_t; |
| |
| #define pgprot_val(x) ((x).pgprot) |
| #define pte_val(x) ((x).pte) |
| #define pmd_val(x) ((x).pmd) |
| #define pud_val(x) ((x).pud) |
| #define pgd_val(x) ((x).pgd) |
| |
| #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 virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
| #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) |
| #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
| |
| #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ |
| VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| |
| #include <asm-generic/memory_model.h> |
| #include <asm-generic/page.h> |
| |
| #endif /* _S390_PAGE_H */ |