| /* |
| * include/asm-s390/page.h |
| * |
| * S390 version |
| * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| * Author(s): Hartmut Penner (hpenner@de.ibm.com) |
| */ |
| |
| #ifndef _S390_PAGE_H |
| #define _S390_PAGE_H |
| |
| #include <asm/setup.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) |
| { |
| 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" ); |
| } |
| |
| #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 pmd0; |
| unsigned long pmd1; |
| } pmd_t; |
| typedef unsigned int pgd_t; |
| typedef struct { unsigned long pgprot; } pgprot_t; |
| |
| #define pte_val(x) ((x).pte) |
| #define pmd_val(x) ((x).pmd0) |
| #define pmd_val1(x) ((x).pmd1) |
| |
| static inline unsigned long __pgd_val(pgd_t *pgdp) |
| { |
| unsigned long addr = (unsigned long) pgdp; |
| unsigned long *pgd_slot = (unsigned long *) (addr & -8); |
| |
| return *pgd_slot + ((addr & 4) << 11); |
| } |
| #define pgd_val(pgd) __pgd_val(&(pgd)) |
| |
| #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) |
| |
| #define get_storage_key() 0 |
| #define pfix_get_page_addr(addr) (unsigned long)addr |
| #define pfix_get_addr(addr) (unsigned long)addr |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _S390_PAGE_H */ |