/*
* 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))
#define PAGE_DEFAULT_ACC 0
#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
#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 */
