[linux-2.6-block.git] / arch / m68k / include / asm / mcf_pgtable.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _MCF_PGTABLE_H
#define _MCF_PGTABLE_H

#include <asm/mcfmmu.h>
#include <asm/page.h>

/*
 * MMUDR bits, in proper place. We write these directly into the MMUDR
 * after masking from the pte.
 */
#define CF_PAGE_LOCKED		MMUDR_LK	/* 0x00000002 */
#define CF_PAGE_EXEC		MMUDR_X		/* 0x00000004 */
#define CF_PAGE_WRITABLE	MMUDR_W		/* 0x00000008 */
#define CF_PAGE_READABLE	MMUDR_R		/* 0x00000010 */
#define CF_PAGE_SYSTEM		MMUDR_SP	/* 0x00000020 */
#define CF_PAGE_COPYBACK	MMUDR_CM_CCB	/* 0x00000040 */
#define CF_PAGE_NOCACHE		MMUDR_CM_NCP	/* 0x00000080 */

#define CF_CACHEMASK		(~MMUDR_CM_CCB)
#define CF_PAGE_MMUDR_MASK	0x000000fe

#define _PAGE_NOCACHE030	CF_PAGE_NOCACHE

/*
 * MMUTR bits, need shifting down.
 */
#define CF_PAGE_MMUTR_MASK	0x00000c00
#define CF_PAGE_MMUTR_SHIFT	10

#define CF_PAGE_VALID		(MMUTR_V << CF_PAGE_MMUTR_SHIFT)
#define CF_PAGE_SHARED		(MMUTR_SG << CF_PAGE_MMUTR_SHIFT)

/*
 * Fake bits, not implemented in CF, will get masked out before
 * hitting hardware.
 */
#define CF_PAGE_DIRTY		0x00000001
#define CF_PAGE_ACCESSED	0x00001000

#define _PAGE_CACHE040		0x020   /* 68040 cache mode, cachable, copyback */
#define _PAGE_NOCACHE_S		0x040   /* 68040 no-cache mode, serialized */
#define _PAGE_NOCACHE		0x060   /* 68040 cache mode, non-serialized */
#define _PAGE_CACHE040W		0x000   /* 68040 cache mode, cachable, write-through */
#define _DESCTYPE_MASK		0x003
#define _CACHEMASK040		(~0x060)
#define _PAGE_GLOBAL040		0x400   /* 68040 global bit, used for kva descs */

/*
 * Externally used page protection values.
 */
#define _PAGE_PRESENT	(CF_PAGE_VALID)
#define _PAGE_ACCESSED	(CF_PAGE_ACCESSED)
#define _PAGE_DIRTY	(CF_PAGE_DIRTY)
#define _PAGE_READWRITE (CF_PAGE_READABLE \
				| CF_PAGE_WRITABLE \
				| CF_PAGE_SYSTEM \
				| CF_PAGE_SHARED)

/*
 * Compound page protection values.
 */
#define PAGE_NONE	__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED)

#define PAGE_SHARED     __pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_SHARED)

#define PAGE_INIT	__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_READABLE \
				 | CF_PAGE_WRITABLE \
				 | CF_PAGE_EXEC \
				 | CF_PAGE_SYSTEM)

#define PAGE_KERNEL	__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_READABLE \
				 | CF_PAGE_WRITABLE \
				 | CF_PAGE_EXEC \
				 | CF_PAGE_SYSTEM \
				 | CF_PAGE_SHARED)

#define PAGE_COPY	__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_READABLE \
				 | CF_PAGE_DIRTY)

/*
 * Page protections for initialising protection_map. See mm/mmap.c
 * for use. In general, the bit positions are xwr, and P-items are
 * private, the S-items are shared.
 */
#define __P000		PAGE_NONE
#define __P001		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_READABLE)
#define __P010		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_WRITABLE)
#define __P011		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_READABLE \
				 | CF_PAGE_WRITABLE)
#define __P100		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_EXEC)
#define __P101		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_READABLE \
				 | CF_PAGE_EXEC)
#define __P110		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_WRITABLE \
				 | CF_PAGE_EXEC)
#define __P111		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_READABLE \
				 | CF_PAGE_WRITABLE \
				 | CF_PAGE_EXEC)

#define __S000		PAGE_NONE
#define __S001		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_READABLE)
#define __S010		PAGE_SHARED
#define __S011		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_SHARED \
				 | CF_PAGE_READABLE)
#define __S100		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_EXEC)
#define __S101		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_READABLE \
				 | CF_PAGE_EXEC)
#define __S110		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_SHARED \
				 | CF_PAGE_EXEC)
#define __S111		__pgprot(CF_PAGE_VALID \
				 | CF_PAGE_ACCESSED \
				 | CF_PAGE_SHARED \
				 | CF_PAGE_READABLE \
				 | CF_PAGE_EXEC)

#define PTE_MASK	PAGE_MASK
#define CF_PAGE_CHG_MASK (PTE_MASK | CF_PAGE_ACCESSED | CF_PAGE_DIRTY)

#ifndef __ASSEMBLY__

/*
 * Conversion functions: convert a page and protection to a page entry,
 * and a page entry and page directory to the page they refer to.
 */
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))

static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
	pte_val(pte) = (pte_val(pte) & CF_PAGE_CHG_MASK) | pgprot_val(newprot);
	return pte;
}

#define pmd_set(pmdp, ptep) do {} while (0)

static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp)
{
	pgd_val(*pgdp) = virt_to_phys(pmdp);
}

#define __pte_page(pte)	((unsigned long) (pte_val(pte) & PAGE_MASK))
#define __pmd_page(pmd)	((unsigned long) (pmd_val(pmd)))

static inline int pte_none(pte_t pte)
{
	return !pte_val(pte);
}

static inline int pte_present(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_VALID;
}

static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
	pte_t *ptep)
{
	pte_val(*ptep) = 0;
}

#define pte_pagenr(pte)	((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT)
#define pte_page(pte)	virt_to_page(__pte_page(pte))

static inline int pmd_none2(pmd_t *pmd) { return !pmd_val(*pmd); }
#define pmd_none(pmd) pmd_none2(&(pmd))
static inline int pmd_bad2(pmd_t *pmd) { return 0; }
#define pmd_bad(pmd) pmd_bad2(&(pmd))
#define pmd_present(pmd) (!pmd_none2(&(pmd)))
static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = 0; }

#define pte_ERROR(e) \
	printk(KERN_ERR "%s:%d: bad pte %08lx.\n",	\
	__FILE__, __LINE__, pte_val(e))
#define pgd_ERROR(e) \
	printk(KERN_ERR "%s:%d: bad pgd %08lx.\n",	\
	__FILE__, __LINE__, pgd_val(e))

/*
 * The following only work if pte_present() is true.
 * Undefined behaviour if not...
 * [we have the full set here even if they don't change from m68k]
 */
static inline int pte_read(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_READABLE;
}

static inline int pte_write(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_WRITABLE;
}

static inline int pte_exec(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_EXEC;
}

static inline int pte_dirty(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_DIRTY;
}

static inline int pte_young(pte_t pte)
{
	return pte_val(pte) & CF_PAGE_ACCESSED;
}

static inline pte_t pte_wrprotect(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_WRITABLE;
	return pte;
}

static inline pte_t pte_rdprotect(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_READABLE;
	return pte;
}

static inline pte_t pte_exprotect(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_EXEC;
	return pte;
}

static inline pte_t pte_mkclean(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_DIRTY;
	return pte;
}

static inline pte_t pte_mkold(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_ACCESSED;
	return pte;
}

static inline pte_t pte_mkwrite(pte_t pte)
{
	pte_val(pte) |= CF_PAGE_WRITABLE;
	return pte;
}

static inline pte_t pte_mkread(pte_t pte)
{
	pte_val(pte) |= CF_PAGE_READABLE;
	return pte;
}

static inline pte_t pte_mkexec(pte_t pte)
{
	pte_val(pte) |= CF_PAGE_EXEC;
	return pte;
}

static inline pte_t pte_mkdirty(pte_t pte)
{
	pte_val(pte) |= CF_PAGE_DIRTY;
	return pte;
}

static inline pte_t pte_mkyoung(pte_t pte)
{
	pte_val(pte) |= CF_PAGE_ACCESSED;
	return pte;
}

static inline pte_t pte_mknocache(pte_t pte)
{
	pte_val(pte) |= 0x80 | (pte_val(pte) & ~0x40);
	return pte;
}

static inline pte_t pte_mkcache(pte_t pte)
{
	pte_val(pte) &= ~CF_PAGE_NOCACHE;
	return pte;
}

#define swapper_pg_dir kernel_pg_dir
extern pgd_t kernel_pg_dir[PTRS_PER_PGD];

/*
 * Find an entry in a pagetable directory.
 */
#define pgd_index(address)	((address) >> PGDIR_SHIFT)
#define pgd_offset(mm, address)	((mm)->pgd + pgd_index(address))

/*
 * Find an entry in a kernel pagetable directory.
 */
#define pgd_offset_k(address)	pgd_offset(&init_mm, address)

/*
 * Find an entry in the third-level pagetable.
 */
#define __pte_offset(address)	((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
#define pte_offset_kernel(dir, address) \
	((pte_t *) __pmd_page(*(dir)) + __pte_offset(address))

/*
 * Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e))
 */
#define __swp_type(x)		((x).val & 0xFF)
#define __swp_offset(x)		((x).val >> 11)
#define __swp_entry(typ, off)	((swp_entry_t) { (typ) | \
					(off << 11) })
#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x)	(__pte((x).val))

#define pmd_page(pmd)		(pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))

#define pte_offset_map(pmdp, addr) ((pte_t *)__pmd_page(*pmdp) + \
				       __pte_offset(addr))
#define pte_unmap(pte)		((void) 0)
#define pfn_pte(pfn, prot)	__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
#define pte_pfn(pte)		(pte_val(pte) >> PAGE_SHIFT)

#endif	/* !__ASSEMBLY__ */
#endif	/* _MCF_PGTABLE_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
91521c2e GU	2	#ifndef _MCF_PGTABLE_H
	3	#define _MCF_PGTABLE_H
	4
	5	#include <asm/mcfmmu.h>
	6	#include <asm/page.h>
	7
	8	/*
	9	* MMUDR bits, in proper place. We write these directly into the MMUDR
	10	* after masking from the pte.
	11	*/
	12	#define CF_PAGE_LOCKED MMUDR_LK /* 0x00000002 */
	13	#define CF_PAGE_EXEC MMUDR_X /* 0x00000004 */
	14	#define CF_PAGE_WRITABLE MMUDR_W /* 0x00000008 */
	15	#define CF_PAGE_READABLE MMUDR_R /* 0x00000010 */
	16	#define CF_PAGE_SYSTEM MMUDR_SP /* 0x00000020 */
	17	#define CF_PAGE_COPYBACK MMUDR_CM_CCB /* 0x00000040 */
	18	#define CF_PAGE_NOCACHE MMUDR_CM_NCP /* 0x00000080 */
	19
	20	#define CF_CACHEMASK (~MMUDR_CM_CCB)
	21	#define CF_PAGE_MMUDR_MASK 0x000000fe
	22
	23	#define _PAGE_NOCACHE030 CF_PAGE_NOCACHE
	24
	25	/*
	26	* MMUTR bits, need shifting down.
	27	*/
	28	#define CF_PAGE_MMUTR_MASK 0x00000c00
	29	#define CF_PAGE_MMUTR_SHIFT 10
	30
	31	#define CF_PAGE_VALID (MMUTR_V << CF_PAGE_MMUTR_SHIFT)
	32	#define CF_PAGE_SHARED (MMUTR_SG << CF_PAGE_MMUTR_SHIFT)
	33
	34	/*
	35	* Fake bits, not implemented in CF, will get masked out before
	36	* hitting hardware.
	37	*/
	38	#define CF_PAGE_DIRTY 0x00000001
91521c2e GU	39	#define CF_PAGE_ACCESSED 0x00001000
	40
	41	#define _PAGE_CACHE040 0x020 /* 68040 cache mode, cachable, copyback */
	42	#define _PAGE_NOCACHE_S 0x040 /* 68040 no-cache mode, serialized */
	43	#define _PAGE_NOCACHE 0x060 /* 68040 cache mode, non-serialized */
	44	#define _PAGE_CACHE040W 0x000 /* 68040 cache mode, cachable, write-through */
	45	#define _DESCTYPE_MASK 0x003
	46	#define _CACHEMASK040 (~0x060)
	47	#define _PAGE_GLOBAL040 0x400 /* 68040 global bit, used for kva descs */
	48
	49	/*
	50	* Externally used page protection values.
	51	*/
	52	#define _PAGE_PRESENT (CF_PAGE_VALID)
	53	#define _PAGE_ACCESSED (CF_PAGE_ACCESSED)
	54	#define _PAGE_DIRTY (CF_PAGE_DIRTY)
	55	#define _PAGE_READWRITE (CF_PAGE_READABLE \
	56	\| CF_PAGE_WRITABLE \
	57	\| CF_PAGE_SYSTEM \
	58	\| CF_PAGE_SHARED)
	59
	60	/*
	61	* Compound page protection values.
	62	*/
	63	#define PAGE_NONE __pgprot(CF_PAGE_VALID \
	64	\| CF_PAGE_ACCESSED)
	65
	66	#define PAGE_SHARED __pgprot(CF_PAGE_VALID \
	67	\| CF_PAGE_ACCESSED \
	68	\| CF_PAGE_SHARED)
	69
	70	#define PAGE_INIT __pgprot(CF_PAGE_VALID \
	71	\| CF_PAGE_READABLE \
	72	\| CF_PAGE_WRITABLE \
	73	\| CF_PAGE_EXEC \
	74	\| CF_PAGE_SYSTEM)
	75
	76	#define PAGE_KERNEL __pgprot(CF_PAGE_VALID \
	77	\| CF_PAGE_ACCESSED \
	78	\| CF_PAGE_READABLE \
	79	\| CF_PAGE_WRITABLE \
	80	\| CF_PAGE_EXEC \
57e00098 AS	81	\| CF_PAGE_SYSTEM \
57e00098 AS	82	\| CF_PAGE_SHARED)
91521c2e GU	83
	84	#define PAGE_COPY __pgprot(CF_PAGE_VALID \
	85	\| CF_PAGE_ACCESSED \
	86	\| CF_PAGE_READABLE \
	87	\| CF_PAGE_DIRTY)
	88
	89	/*
	90	* Page protections for initialising protection_map. See mm/mmap.c
	91	* for use. In general, the bit positions are xwr, and P-items are
	92	* private, the S-items are shared.
	93	*/
	94	#define __P000 PAGE_NONE
	95	#define __P001 __pgprot(CF_PAGE_VALID \
	96	\| CF_PAGE_ACCESSED \
	97	\| CF_PAGE_READABLE)
	98	#define __P010 __pgprot(CF_PAGE_VALID \
	99	\| CF_PAGE_ACCESSED \
	100	\| CF_PAGE_WRITABLE)
	101	#define __P011 __pgprot(CF_PAGE_VALID \
	102	\| CF_PAGE_ACCESSED \
	103	\| CF_PAGE_READABLE \
	104	\| CF_PAGE_WRITABLE)
	105	#define __P100 __pgprot(CF_PAGE_VALID \
	106	\| CF_PAGE_ACCESSED \
	107	\| CF_PAGE_EXEC)
	108	#define __P101 __pgprot(CF_PAGE_VALID \
	109	\| CF_PAGE_ACCESSED \
	110	\| CF_PAGE_READABLE \
	111	\| CF_PAGE_EXEC)
	112	#define __P110 __pgprot(CF_PAGE_VALID \
	113	\| CF_PAGE_ACCESSED \
	114	\| CF_PAGE_WRITABLE \
	115	\| CF_PAGE_EXEC)
	116	#define __P111 __pgprot(CF_PAGE_VALID \
	117	\| CF_PAGE_ACCESSED \
	118	\| CF_PAGE_READABLE \
	119	\| CF_PAGE_WRITABLE \
	120	\| CF_PAGE_EXEC)
	121
	122	#define __S000 PAGE_NONE
	123	#define __S001 __pgprot(CF_PAGE_VALID \
	124	\| CF_PAGE_ACCESSED \
	125	\| CF_PAGE_READABLE)
	126	#define __S010 PAGE_SHARED
	127	#define __S011 __pgprot(CF_PAGE_VALID \
	128	\| CF_PAGE_ACCESSED \
	129	\| CF_PAGE_SHARED \
	130	\| CF_PAGE_READABLE)
	131	#define __S100 __pgprot(CF_PAGE_VALID \
	132	\| CF_PAGE_ACCESSED \
	133	\| CF_PAGE_EXEC)
	134	#define __S101 __pgprot(CF_PAGE_VALID \
	135	\| CF_PAGE_ACCESSED \
	136	\| CF_PAGE_READABLE \
	137	\| CF_PAGE_EXEC)
	138	#define __S110 __pgprot(CF_PAGE_VALID \
	139	\| CF_PAGE_ACCESSED \
	140	\| CF_PAGE_SHARED \
	141	\| CF_PAGE_EXEC)
	142	#define __S111 __pgprot(CF_PAGE_VALID \
	143	\| CF_PAGE_ACCESSED \
	144	\| CF_PAGE_SHARED \
	145	\| CF_PAGE_READABLE \
	146	\| CF_PAGE_EXEC)
147
148	#define PTE_MASK PAGE_MASK
149	#define CF_PAGE_CHG_MASK (PTE_MASK \| CF_PAGE_ACCESSED \| CF_PAGE_DIRTY)
150
151	#ifndef __ASSEMBLY__
152
153	/*
154	* Conversion functions: convert a page and protection to a page entry,
155	* and a page entry and page directory to the page they refer to.
156	*/
157	#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
158
159	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
160	{
161	pte_val(pte) = (pte_val(pte) & CF_PAGE_CHG_MASK) \| pgprot_val(newprot);
162	return pte;
163	}
164
165	#define pmd_set(pmdp, ptep) do {} while (0)
166
167	static inline void pgd_set(pgd_t pgdp, pmd_t pmdp)
168	{
169	pgd_val(*pgdp) = virt_to_phys(pmdp);
170	}
171
172	#define __pte_page(pte) ((unsigned long) (pte_val(pte) & PAGE_MASK))
173	#define __pmd_page(pmd) ((unsigned long) (pmd_val(pmd)))
174
175	static inline int pte_none(pte_t pte)
176	{
177	return !pte_val(pte);
178	}
179
180	static inline int pte_present(pte_t pte)
181	{
182	return pte_val(pte) & CF_PAGE_VALID;
183	}
184
185	static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
186	pte_t *ptep)
187	{
188	pte_val(*ptep) = 0;
189	}
190
191	#define pte_pagenr(pte) ((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT)
192	#define pte_page(pte) virt_to_page(__pte_page(pte))
193
194	static inline int pmd_none2(pmd_t pmd) { return !pmd_val(pmd); }
195	#define pmd_none(pmd) pmd_none2(&(pmd))
196	static inline int pmd_bad2(pmd_t *pmd) { return 0; }
197	#define pmd_bad(pmd) pmd_bad2(&(pmd))
198	#define pmd_present(pmd) (!pmd_none2(&(pmd)))
199	static inline void pmd_clear(pmd_t pmdp) { pmd_val(pmdp) = 0; }
200
91521c2e GU	201	#define pte_ERROR(e) \
	202	printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \
	203	__FILE__, __LINE__, pte_val(e))
91521c2e GU	204	#define pgd_ERROR(e) \
	205	printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \
	206	__FILE__, __LINE__, pgd_val(e))
	207
	208	/*
	209	* The following only work if pte_present() is true.
	210	* Undefined behaviour if not...
	211	* [we have the full set here even if they don't change from m68k]
	212	*/
	213	static inline int pte_read(pte_t pte)
	214	{
	215	return pte_val(pte) & CF_PAGE_READABLE;
	216	}
	217
	218	static inline int pte_write(pte_t pte)
	219	{
	220	return pte_val(pte) & CF_PAGE_WRITABLE;
	221	}
	222
	223	static inline int pte_exec(pte_t pte)
	224	{
	225	return pte_val(pte) & CF_PAGE_EXEC;
	226	}
	227
	228	static inline int pte_dirty(pte_t pte)
	229	{
	230	return pte_val(pte) & CF_PAGE_DIRTY;
	231	}
	232
	233	static inline int pte_young(pte_t pte)
	234	{
	235	return pte_val(pte) & CF_PAGE_ACCESSED;
	236	}
	237
91521c2e GU	238	static inline pte_t pte_wrprotect(pte_t pte)
	239	{
	240	pte_val(pte) &= ~CF_PAGE_WRITABLE;
	241	return pte;
	242	}
	243
	244	static inline pte_t pte_rdprotect(pte_t pte)
	245	{
	246	pte_val(pte) &= ~CF_PAGE_READABLE;
	247	return pte;
	248	}
	249
	250	static inline pte_t pte_exprotect(pte_t pte)
	251	{
	252	pte_val(pte) &= ~CF_PAGE_EXEC;
	253	return pte;
	254	}
	255
	256	static inline pte_t pte_mkclean(pte_t pte)
	257	{
	258	pte_val(pte) &= ~CF_PAGE_DIRTY;
	259	return pte;
	260	}
	261
	262	static inline pte_t pte_mkold(pte_t pte)
	263	{
	264	pte_val(pte) &= ~CF_PAGE_ACCESSED;
	265	return pte;
	266	}
	267
	268	static inline pte_t pte_mkwrite(pte_t pte)
	269	{
	270	pte_val(pte) \|= CF_PAGE_WRITABLE;
	271	return pte;
	272	}
	273
	274	static inline pte_t pte_mkread(pte_t pte)
	275	{
	276	pte_val(pte) \|= CF_PAGE_READABLE;
	277	return pte;
	278	}
	279
	280	static inline pte_t pte_mkexec(pte_t pte)
	281	{
	282	pte_val(pte) \|= CF_PAGE_EXEC;
	283	return pte;
	284	}
	285
	286	static inline pte_t pte_mkdirty(pte_t pte)
	287	{
	288	pte_val(pte) \|= CF_PAGE_DIRTY;
	289	return pte;
	290	}
	291
	292	static inline pte_t pte_mkyoung(pte_t pte)
	293	{
	294	pte_val(pte) \|= CF_PAGE_ACCESSED;
	295	return pte;
	296	}
	297
	298	static inline pte_t pte_mknocache(pte_t pte)
	299	{
	300	pte_val(pte) \|= 0x80 \| (pte_val(pte) & ~0x40);
	301	return pte;
302	}
303
304	static inline pte_t pte_mkcache(pte_t pte)
305	{
306	pte_val(pte) &= ~CF_PAGE_NOCACHE;
307	return pte;
308	}
309
91521c2e GU	310	#define swapper_pg_dir kernel_pg_dir
	311	extern pgd_t kernel_pg_dir[PTRS_PER_PGD];
	312
	313	/*
	314	* Find an entry in a pagetable directory.
	315	*/
	316	#define pgd_index(address) ((address) >> PGDIR_SHIFT)
	317	#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
	318
	319	/*
	320	* Find an entry in a kernel pagetable directory.
	321	*/
	322	#define pgd_offset_k(address) pgd_offset(&init_mm, address)
	323
91521c2e GU	324	/*
	325	* Find an entry in the third-level pagetable.
	326	*/
	327	#define __pte_offset(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
	328	#define pte_offset_kernel(dir, address) \
	329	((pte_t ) __pmd_page((dir)) + __pte_offset(address))
	330
91521c2e GU	331	/*
	332	* Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e))
	333	*/
	334	#define __swp_type(x) ((x).val & 0xFF)
1eeda0ab	335	#define __swp_offset(x) ((x).val >> 11)
91521c2e	336	#define __swp_entry(typ, off) ((swp_entry_t) { (typ) \| \
1eeda0ab	337	(off << 11) })
91521c2e GU	338	#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
	339	#define __swp_entry_to_pte(x) (__pte((x).val))
	340
	341	#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
	342
	343	#define pte_offset_map(pmdp, addr) ((pte_t )__pmd_page(pmdp) + \
	344	__pte_offset(addr))
	345	#define pte_unmap(pte) ((void) 0)
	346	#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) \| pgprot_val(prot))
	347	#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
	348
	349	#endif /* !__ASSEMBLY__ */
	350	#endif /* _MCF_PGTABLE_H */