[mirror_ubuntu-bionic-kernel.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 <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 */
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
	12	#include <asm/setup.h>
	13	#include <asm/types.h>
	14
	15	/* PAGE_SHIFT determines the page size */
	16	#define PAGE_SHIFT 12
	17	#define PAGE_SIZE (1UL << PAGE_SHIFT)
	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 LT	21
	22	#ifdef __KERNEL__
	23	#ifndef __ASSEMBLY__
	24
	25	#ifndef __s390x__
	26
	27	static inline void clear_page(void *page)
	28	{
	29	register_pair rp;
	30
	31	rp.subreg.even = (unsigned long) page;
	32	rp.subreg.odd = (unsigned long) 4096;
	33	asm volatile (" slr 1,1\n"
	34	" mvcl %0,0"
	35	: "+&a" (rp) : : "memory", "cc", "1" );
	36	}
	37
	38	static inline void copy_page(void to, void from)
	39	{
	40	if (MACHINE_HAS_MVPG)
	41	asm volatile (" sr 0,0\n"
	42	" mvpg %0,%1"
	43	: : "a" ((void )(to)), "a" ((void )(from))
	44	: "memory", "cc", "0" );
	45	else
	46	asm volatile (" mvc 0(256,%0),0(%1)\n"
	47	" mvc 256(256,%0),256(%1)\n"
	48	" mvc 512(256,%0),512(%1)\n"
	49	" mvc 768(256,%0),768(%1)\n"
	50	" mvc 1024(256,%0),1024(%1)\n"
	51	" mvc 1280(256,%0),1280(%1)\n"
	52	" mvc 1536(256,%0),1536(%1)\n"
	53	" mvc 1792(256,%0),1792(%1)\n"
	54	" mvc 2048(256,%0),2048(%1)\n"
	55	" mvc 2304(256,%0),2304(%1)\n"
	56	" mvc 2560(256,%0),2560(%1)\n"
	57	" mvc 2816(256,%0),2816(%1)\n"
	58	" mvc 3072(256,%0),3072(%1)\n"
	59	" mvc 3328(256,%0),3328(%1)\n"
	60	" mvc 3584(256,%0),3584(%1)\n"
	61	" mvc 3840(256,%0),3840(%1)\n"
	62	: : "a"((void )(to)),"a"((void )(from))
	63	: "memory" );
	64	}
	65
	66	#else /* __s390x__ */
	67
	68	static inline void clear_page(void *page)
	69	{
	70	asm volatile (" lgr 2,%0\n"
	71	" lghi 3,4096\n"
	72	" slgr 1,1\n"
	73	" mvcl 2,0"
	74	: : "a" ((void *) (page))
	75	: "memory", "cc", "1", "2", "3" );
	76	}
	77
	78	static inline void copy_page(void to, void from)
	79	{
	80	if (MACHINE_HAS_MVPG)
	81	asm volatile (" sgr 0,0\n"
	82	" mvpg %0,%1"
	83	: : "a" ((void )(to)), "a" ((void )(from))
	84	: "memory", "cc", "0" );
85	else
86	asm volatile (" mvc 0(256,%0),0(%1)\n"
87	" mvc 256(256,%0),256(%1)\n"
88	" mvc 512(256,%0),512(%1)\n"
89	" mvc 768(256,%0),768(%1)\n"
90	" mvc 1024(256,%0),1024(%1)\n"
91	" mvc 1280(256,%0),1280(%1)\n"
92	" mvc 1536(256,%0),1536(%1)\n"
93	" mvc 1792(256,%0),1792(%1)\n"
94	" mvc 2048(256,%0),2048(%1)\n"
95	" mvc 2304(256,%0),2304(%1)\n"
96	" mvc 2560(256,%0),2560(%1)\n"
97	" mvc 2816(256,%0),2816(%1)\n"
98	" mvc 3072(256,%0),3072(%1)\n"
99	" mvc 3328(256,%0),3328(%1)\n"
100	" mvc 3584(256,%0),3584(%1)\n"
101	" mvc 3840(256,%0),3840(%1)\n"
102	: : "a"((void )(to)),"a"((void )(from))
103	: "memory" );
104	}
105
106	#endif /* __s390x__ */
107
108	#define clear_user_page(page, vaddr, pg) clear_page(page)
109	#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
110
111	#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER \| __GFP_ZERO, vma, vaddr)
112	#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
113
114	/* Pure 2^n version of get_order */
115	extern __inline__ int get_order(unsigned long size)
116	{
117	int order;
118
119	size = (size-1) >> (PAGE_SHIFT-1);
120	order = -1;
121	do {
122	size >>= 1;
123	order++;
124	} while (size);
125	return order;
126	}
127
128	/*
129	* These are used to make use of C type-checking..
130	*/
131
132	typedef struct { unsigned long pgprot; } pgprot_t;
133	typedef struct { unsigned long pte; } pte_t;
134
135	#define pte_val(x) ((x).pte)
136	#define pgprot_val(x) ((x).pgprot)
137
138	#ifndef __s390x__
139
140	typedef struct { unsigned long pmd; } pmd_t;
141	typedef struct {
142	unsigned long pgd0;
143	unsigned long pgd1;
144	unsigned long pgd2;
145	unsigned long pgd3;
146	} pgd_t;
147
148	#define pmd_val(x) ((x).pmd)
149	#define pgd_val(x) ((x).pgd0)
150
151	#else /* __s390x__ */
152
153	typedef struct {
154	unsigned long pmd0;
155	unsigned long pmd1;
156	} pmd_t;
157	typedef struct { unsigned long pgd; } pgd_t;
158
159	#define pmd_val(x) ((x).pmd0)
160	#define pmd_val1(x) ((x).pmd1)
161	#define pgd_val(x) ((x).pgd)
162
163	#endif /* __s390x__ */
164
165	#define __pte(x) ((pte_t) { (x) } )
166	#define __pmd(x) ((pmd_t) { (x) } )
167	#define __pgd(x) ((pgd_t) { (x) } )
168	#define __pgprot(x) ((pgprot_t) { (x) } )
169
170	/* default storage key used for all pages */
171	extern unsigned int default_storage_key;
172
173	static inline void
174	page_set_storage_key(unsigned long addr, unsigned int skey)
175	{
176	asm volatile ( "sske %0,%1" : : "d" (skey), "a" (addr) );
177	}
178
179	static inline unsigned int
180	page_get_storage_key(unsigned long addr)
181	{
182	unsigned int skey;
183
184	asm volatile ( "iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0) );
185
186	return skey;
187	}
188
189	#endif /* !__ASSEMBLY__ */
190
191	/* to align the pointer to the (next) page boundary */
192	#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
193
194	#define __PAGE_OFFSET 0x0UL
195	#define PAGE_OFFSET 0x0UL
196	#define __pa(x) (unsigned long)(x)
197	#define __va(x) (void *)(unsigned long)(x)
198	#define pfn_to_page(pfn) (mem_map + (pfn))
199	#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
200	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
201
202	#define pfn_valid(pfn) ((pfn) < max_mapnr)
203	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
204
205	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
206	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
207
208	#endif /* __KERNEL__ */
209
210	#endif /* _S390_PAGE_H */