151 lines
3.9 KiB
C
151 lines
3.9 KiB
C
/*
|
|
* 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)
|
|
|
|
#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;
|
|
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;
|
|
}
|
|
|
|
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_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/page.h>
|
|
|
|
#endif /* _S390_PAGE_H */
|