Viewing file:  page.h (4.44 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* 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)
#ifdef __KERNEL__
#include <asm/setup.h>
#ifndef __ASSEMBLY__
static inline void clear_page(void *page)
{
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;
#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 pud; } pud_t;
typedef struct {
unsigned long pgd0;
unsigned long pgd1;
unsigned long pgd2;
unsigned long pgd3;
} pgd_t;
#define pmd_val(x) ((x).pmd)
#define pud_val(x) ((x).pud)
#define pgd_val(x) ((x).pgd0)
#else /* __s390x__ */
typedef struct {
unsigned long pmd0;
unsigned long pmd1;
} pmd_t;
typedef struct { unsigned long pud; } pud_t;
typedef struct { unsigned long pgd; } pgd_t;
#define pmd_val(x) ((x).pmd0)
#define pmd_val1(x) ((x).pmd1)
#define pud_val(x) ((x).pud)
#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;
}
extern unsigned long max_pfn;
static inline int pfn_valid(unsigned long pfn)
{
unsigned long dummy;
int ccode;
if (pfn >= max_pfn)
return 0;
asm volatile(
" lra %0,0(%2)\n"
" ipm %1\n"
" srl %1,28\n"
: "=d" (dummy), "=d" (ccode)
: "a" (pfn << PAGE_SHIFT)
: "cc");
return !ccode;
}
#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_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>
#endif /* __KERNEL__ */
#endif /* _S390_PAGE_H */
|