[deliverable/linux.git] / include / asm-s390 / page.h

/*
 *  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 */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* include/asm-s390/page.h
	3	*
	4	* S390 version
	5	* Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
	6	* Author(s): Hartmut Penner (hp@de.ibm.com)
	7	*/
	8
	9	#ifndef _S390_PAGE_H
	10	#define _S390_PAGE_H
	11
52480ee5	12	#include <linux/const.h>
1da177e4 LT	13	#include <asm/types.h>
	14
	15	/* PAGE_SHIFT determines the page size */
	16	#define PAGE_SHIFT 12
52480ee5	17	#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
1da177e4	18	#define PAGE_MASK (~(PAGE_SIZE-1))
0b642ede PO	19	#define PAGE_DEFAULT_ACC 0
0b642ede PO	20	#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
1da177e4	21
274f5946	22	#include <asm/setup.h>
1da177e4 LT	23	#ifndef __ASSEMBLY__
1da177e4 LT	24
1da177e4 LT	25	static inline void clear_page(void *page)
1da177e4 LT	26	{
94c12cc7 MS	27	register unsigned long reg1 asm ("1") = 0;
	28	register void *reg2 asm ("2") = page;
	29	register unsigned long reg3 asm ("3") = 4096;
	30	asm volatile(
	31	" mvcl 2,0"
	32	: "+d" (reg2), "+d" (reg3) : "d" (reg1) : "memory", "cc");
1da177e4 LT	33	}
	34
	35	static inline void copy_page(void to, void from)
	36	{
94c12cc7 MS	37	if (MACHINE_HAS_MVPG) {
	38	register unsigned long reg0 asm ("0") = 0;
	39	asm volatile(
	40	" mvpg %0,%1"
	41	: : "a" (to), "a" (from), "d" (reg0)
	42	: "memory", "cc");
	43	} else
	44	asm volatile(
	45	" mvc 0(256,%0),0(%1)\n"
	46	" mvc 256(256,%0),256(%1)\n"
	47	" mvc 512(256,%0),512(%1)\n"
	48	" mvc 768(256,%0),768(%1)\n"
	49	" mvc 1024(256,%0),1024(%1)\n"
	50	" mvc 1280(256,%0),1280(%1)\n"
	51	" mvc 1536(256,%0),1536(%1)\n"
	52	" mvc 1792(256,%0),1792(%1)\n"
	53	" mvc 2048(256,%0),2048(%1)\n"
	54	" mvc 2304(256,%0),2304(%1)\n"
	55	" mvc 2560(256,%0),2560(%1)\n"
	56	" mvc 2816(256,%0),2816(%1)\n"
	57	" mvc 3072(256,%0),3072(%1)\n"
	58	" mvc 3328(256,%0),3328(%1)\n"
	59	" mvc 3584(256,%0),3584(%1)\n"
	60	" mvc 3840(256,%0),3840(%1)\n"
	61	: : "a" (to), "a" (from) : "memory");
1da177e4 LT	62	}
1da177e4 LT	63
1da177e4 LT	64	#define clear_user_page(page, vaddr, pg) clear_page(page)
	65	#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
	66
769848c0 MG	67	#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
769848c0 MG	68	alloc_page_vma(GFP_HIGHUSER \| __GFP_ZERO \| movableflags, vma, vaddr)
1da177e4 LT	69	#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
1da177e4 LT	70
1da177e4 LT	71	/*
	72	* These are used to make use of C type-checking..
	73	*/
	74
	75	typedef struct { unsigned long pgprot; } pgprot_t;
	76	typedef struct { unsigned long pte; } pte_t;
1da177e4	77	typedef struct { unsigned long pmd; } pmd_t;
190a1d72	78	typedef struct { unsigned long pud; } pud_t;
1da177e4	79	typedef struct { unsigned long pgd; } pgd_t;
146e4b3c	80	typedef pte_t *pgtable_t;
1da177e4	81
146e4b3c MS	82	#define pgprot_val(x) ((x).pgprot)
	83	#define pte_val(x) ((x).pte)
	84	#define pmd_val(x) ((x).pmd)
190a1d72	85	#define pud_val(x) ((x).pud)
1da177e4 LT	86	#define pgd_val(x) ((x).pgd)
1da177e4 LT	87
1da177e4 LT	88	#define __pte(x) ((pte_t) { (x) } )
	89	#define __pmd(x) ((pmd_t) { (x) } )
	90	#define __pgd(x) ((pgd_t) { (x) } )
	91	#define __pgprot(x) ((pgprot_t) { (x) } )
	92
	93	/* default storage key used for all pages */
	94	extern unsigned int default_storage_key;
	95
	96	static inline void
	97	page_set_storage_key(unsigned long addr, unsigned int skey)
	98	{
94c12cc7	99	asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
1da177e4 LT	100	}
	101
	102	static inline unsigned int
	103	page_get_storage_key(unsigned long addr)
	104	{
	105	unsigned int skey;
	106
94c12cc7	107	asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0));
1da177e4 LT	108	return skey;
	109	}
	110
f4eb07c1 HC	111	extern unsigned long max_pfn;
	112
	113	static inline int pfn_valid(unsigned long pfn)
	114	{
	115	unsigned long dummy;
	116	int ccode;
	117
	118	if (pfn >= max_pfn)
	119	return 0;
	120
	121	asm volatile(
	122	" lra %0,0(%2)\n"
	123	" ipm %1\n"
	124	" srl %1,28\n"
	125	: "=d" (dummy), "=d" (ccode)
	126	: "a" (pfn << PAGE_SHIFT)
	127	: "cc");
	128	return !ccode;
	129	}
	130
1da177e4 LT	131	#endif /* !__ASSEMBLY__ */
	132
	133	/* to align the pointer to the (next) page boundary */
	134	#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
	135
	136	#define __PAGE_OFFSET 0x0UL
	137	#define PAGE_OFFSET 0x0UL
	138	#define __pa(x) (unsigned long)(x)
	139	#define __va(x) (void *)(unsigned long)(x)
1da177e4	140	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
0b2b6e1d	141	#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
1da177e4 LT	142	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
1da177e4 LT	143
146e4b3c	144	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| \
1da177e4 LT	145	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
1da177e4 LT	146
aed63043	147	#include <asm-generic/memory_model.h>
fd4fd5aa SR	148	#include <asm-generic/page.h>
fd4fd5aa SR	149
1da177e4	150	#endif /* _S390_PAGE_H */