[mirror_ubuntu-kernels.git] / arch / s390 / include / asm / 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)

#define HPAGE_SHIFT	20
#define HPAGE_SIZE	(1UL << HPAGE_SHIFT)
#define HPAGE_MASK	(~(HPAGE_SIZE - 1))
#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)

#define ARCH_HAS_SETCLEAR_HUGE_PTE
#define ARCH_HAS_HUGE_PTE_TYPE
#define ARCH_HAS_PREPARE_HUGEPAGE
#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH

#include <asm/setup.h>
#ifndef __ASSEMBLY__

static inline void clear_page(void *page)
{
	if (MACHINE_HAS_PFMF) {
		asm volatile(
			"	.insn	rre,0xb9af0000,%0,%1"
			: : "d" (0x10000), "a" (page) : "memory", "cc");
	} else {
		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;
}

#ifdef CONFIG_PAGE_STATES

struct page;
void arch_free_page(struct page *page, int order);
void arch_alloc_page(struct page *page, int order);

#define HAVE_ARCH_FREE_PAGE
#define HAVE_ARCH_ALLOC_PAGE

#endif

#endif /* !__ASSEMBLY__ */

#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>

#define __HAVE_ARCH_GATE_AREA 1

#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
53492b1d GS	22	#define HPAGE_SHIFT 20
	23	#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
	24	#define HPAGE_MASK (~(HPAGE_SIZE - 1))
	25	#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
	26
	27	#define ARCH_HAS_SETCLEAR_HUGE_PTE
	28	#define ARCH_HAS_HUGE_PTE_TYPE
	29	#define ARCH_HAS_PREPARE_HUGEPAGE
	30	#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
	31
274f5946	32	#include <asm/setup.h>
1da177e4 LT	33	#ifndef __ASSEMBLY__
1da177e4 LT	34
1da177e4 LT	35	static inline void clear_page(void *page)
1da177e4 LT	36	{
53492b1d GS	37	if (MACHINE_HAS_PFMF) {
	38	asm volatile(
	39	" .insn rre,0xb9af0000,%0,%1"
	40	: : "d" (0x10000), "a" (page) : "memory", "cc");
	41	} else {
	42	register unsigned long reg1 asm ("1") = 0;
	43	register void *reg2 asm ("2") = page;
	44	register unsigned long reg3 asm ("3") = 4096;
	45	asm volatile(
	46	" mvcl 2,0"
	47	: "+d" (reg2), "+d" (reg3) : "d" (reg1)
	48	: "memory", "cc");
	49	}
1da177e4 LT	50	}
	51
	52	static inline void copy_page(void to, void from)
	53	{
94c12cc7 MS	54	if (MACHINE_HAS_MVPG) {
	55	register unsigned long reg0 asm ("0") = 0;
	56	asm volatile(
	57	" mvpg %0,%1"
	58	: : "a" (to), "a" (from), "d" (reg0)
	59	: "memory", "cc");
	60	} else
	61	asm volatile(
	62	" mvc 0(256,%0),0(%1)\n"
	63	" mvc 256(256,%0),256(%1)\n"
	64	" mvc 512(256,%0),512(%1)\n"
	65	" mvc 768(256,%0),768(%1)\n"
	66	" mvc 1024(256,%0),1024(%1)\n"
	67	" mvc 1280(256,%0),1280(%1)\n"
	68	" mvc 1536(256,%0),1536(%1)\n"
	69	" mvc 1792(256,%0),1792(%1)\n"
	70	" mvc 2048(256,%0),2048(%1)\n"
	71	" mvc 2304(256,%0),2304(%1)\n"
	72	" mvc 2560(256,%0),2560(%1)\n"
	73	" mvc 2816(256,%0),2816(%1)\n"
	74	" mvc 3072(256,%0),3072(%1)\n"
	75	" mvc 3328(256,%0),3328(%1)\n"
	76	" mvc 3584(256,%0),3584(%1)\n"
	77	" mvc 3840(256,%0),3840(%1)\n"
	78	: : "a" (to), "a" (from) : "memory");
1da177e4 LT	79	}
1da177e4 LT	80
1da177e4 LT	81	#define clear_user_page(page, vaddr, pg) clear_page(page)
	82	#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
	83
769848c0 MG	84	#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
769848c0 MG	85	alloc_page_vma(GFP_HIGHUSER \| __GFP_ZERO \| movableflags, vma, vaddr)
1da177e4 LT	86	#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
1da177e4 LT	87
1da177e4 LT	88	/*
	89	* These are used to make use of C type-checking..
	90	*/
	91
	92	typedef struct { unsigned long pgprot; } pgprot_t;
	93	typedef struct { unsigned long pte; } pte_t;
1da177e4	94	typedef struct { unsigned long pmd; } pmd_t;
190a1d72	95	typedef struct { unsigned long pud; } pud_t;
1da177e4	96	typedef struct { unsigned long pgd; } pgd_t;
146e4b3c	97	typedef pte_t *pgtable_t;
1da177e4	98
146e4b3c MS	99	#define pgprot_val(x) ((x).pgprot)
	100	#define pte_val(x) ((x).pte)
	101	#define pmd_val(x) ((x).pmd)
190a1d72	102	#define pud_val(x) ((x).pud)
1da177e4 LT	103	#define pgd_val(x) ((x).pgd)
1da177e4 LT	104
1da177e4 LT	105	#define __pte(x) ((pte_t) { (x) } )
	106	#define __pmd(x) ((pmd_t) { (x) } )
	107	#define __pgd(x) ((pgd_t) { (x) } )
	108	#define __pgprot(x) ((pgprot_t) { (x) } )
	109
	110	/* default storage key used for all pages */
	111	extern unsigned int default_storage_key;
	112
	113	static inline void
	114	page_set_storage_key(unsigned long addr, unsigned int skey)
	115	{
94c12cc7	116	asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
1da177e4 LT	117	}
	118
	119	static inline unsigned int
	120	page_get_storage_key(unsigned long addr)
	121	{
	122	unsigned int skey;
	123
94c12cc7	124	asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0));
1da177e4 LT	125	return skey;
	126	}
	127
45e576b1 MS	128	#ifdef CONFIG_PAGE_STATES
	129
	130	struct page;
	131	void arch_free_page(struct page *page, int order);
	132	void arch_alloc_page(struct page *page, int order);
	133
	134	#define HAVE_ARCH_FREE_PAGE
	135	#define HAVE_ARCH_ALLOC_PAGE
	136
	137	#endif
	138
1da177e4 LT	139	#endif /* !__ASSEMBLY__ */
1da177e4 LT	140
1da177e4 LT	141	#define __PAGE_OFFSET 0x0UL
	142	#define PAGE_OFFSET 0x0UL
	143	#define __pa(x) (unsigned long)(x)
	144	#define __va(x) (void *)(unsigned long)(x)
1da177e4	145	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
0b2b6e1d	146	#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
1da177e4 LT	147	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
1da177e4 LT	148
146e4b3c	149	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| \
1da177e4 LT	150	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
1da177e4 LT	151
aed63043	152	#include <asm-generic/memory_model.h>
fd4fd5aa SR	153	#include <asm-generic/page.h>
fd4fd5aa SR	154
b020632e MS	155	#define __HAVE_ARCH_GATE_AREA 1
b020632e MS	156
1da177e4	157	#endif /* _S390_PAGE_H */