Release 4.14 arch/m68k/include/asm/motorola_pgtable.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _MOTOROLA_PGTABLE_H

#define _MOTOROLA_PGTABLE_H


/*
 * Definitions for MMU descriptors
 */

#define _PAGE_PRESENT	0x001

#define _PAGE_SHORT	0x002

#define _PAGE_RONLY	0x004

#define _PAGE_READWRITE	0x000

#define _PAGE_ACCESSED	0x008

#define _PAGE_DIRTY	0x010

#define _PAGE_SUPER	0x080	
/* 68040 supervisor only */

#define _PAGE_GLOBAL040	0x400	
/* 68040 global bit, used for kva descs */

#define _PAGE_NOCACHE030 0x040	
/* 68030 no-cache mode */

#define _PAGE_NOCACHE	0x060	
/* 68040 cache mode, non-serialized */

#define _PAGE_NOCACHE_S	0x040	
/* 68040 no-cache mode, serialized */

#define _PAGE_CACHE040	0x020	
/* 68040 cache mode, cachable, copyback */

#define _PAGE_CACHE040W	0x000	
/* 68040 cache mode, cachable, write-through */


#define _DESCTYPE_MASK	0x003


#define _CACHEMASK040	(~0x060)

#define _TABLE_MASK	(0xfffffe00)


#define _PAGE_TABLE	(_PAGE_SHORT)

#define _PAGE_CHG_MASK  (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_NOCACHE)


#define _PAGE_PROTNONE	0x004

#ifndef __ASSEMBLY__

/* This is the cache mode to be used for pages containing page descriptors for
 * processors >= '040. It is in pte_mknocache(), and the variable is defined
 * and initialized in head.S */
extern int m68k_pgtable_cachemode;

/* This is the cache mode for normal pages, for supervisor access on
 * processors >= '040. It is used in pte_mkcache(), and the variable is
 * defined and initialized in head.S */

#if defined(CPU_M68060_ONLY) && defined(CONFIG_060_WRITETHROUGH)

#define m68k_supervisor_cachemode _PAGE_CACHE040W
#elif defined(CPU_M68040_OR_M68060_ONLY)

#define m68k_supervisor_cachemode _PAGE_CACHE040
#elif defined(CPU_M68020_OR_M68030_ONLY)

#define m68k_supervisor_cachemode 0
#else
extern int m68k_supervisor_cachemode;
#endif

#if defined(CPU_M68040_OR_M68060_ONLY)

#define mm_cachebits _PAGE_CACHE040
#elif defined(CPU_M68020_OR_M68030_ONLY)

#define mm_cachebits 0
#else
extern unsigned long mm_cachebits;
#endif


#define PAGE_NONE	__pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED | mm_cachebits)

#define PAGE_SHARED	__pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | mm_cachebits)

#define PAGE_COPY	__pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED | mm_cachebits)

#define PAGE_READONLY	__pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED | mm_cachebits)

#define PAGE_KERNEL	__pgprot(_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED | mm_cachebits)

/* Alternate definitions that are compile time constants, for
   initializing protection_map.  The cachebits are fixed later.  */

#define PAGE_NONE_C	__pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)

#define PAGE_SHARED_C	__pgprot(_PAGE_PRESENT | _PAGE_ACCESSED)

#define PAGE_COPY_C	__pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED)

#define PAGE_READONLY_C	__pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED)

/*
 * The m68k can't do page protection for execute, and considers that the same are read.
 * Also, write permissions imply read permissions. This is the closest we can get..
 */

#define __P000	PAGE_NONE_C

#define __P001	PAGE_READONLY_C

#define __P010	PAGE_COPY_C

#define __P011	PAGE_COPY_C

#define __P100	PAGE_READONLY_C

#define __P101	PAGE_READONLY_C

#define __P110	PAGE_COPY_C

#define __P111	PAGE_COPY_C


#define __S000	PAGE_NONE_C

#define __S001	PAGE_READONLY_C

#define __S010	PAGE_SHARED_C

#define __S011	PAGE_SHARED_C

#define __S100	PAGE_READONLY_C

#define __S101	PAGE_READONLY_C

#define __S110	PAGE_SHARED_C

#define __S111	PAGE_SHARED_C

/*
 * 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) & _PAGE_CHG_MASK) | pgprot_val(newprot);
	return pte;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
34
97.14%
1
50.00%
Andrew Morton
1
2.86%
1
50.00%
Total
35
100.00%
2
100.00%



static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
{
	unsigned long ptbl = virt_to_phys(ptep) | _PAGE_TABLE | _PAGE_ACCESSED;
	unsigned long *ptr = pmdp->pmd;
	short i = 16;
	while (--i >= 0) {
		*ptr++ = ptbl;
		ptbl += (sizeof(pte_t)*PTRS_PER_PTE/16);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
69
98.57%
1
50.00%
Andrew Morton
1
1.43%
1
50.00%
Total
70
100.00%
2
100.00%



static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp)
{
	pgd_val(*pgdp) = _PAGE_TABLE | _PAGE_ACCESSED | __pa(pmdp);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
29
96.67%
1
50.00%
Andrew Morton
1
3.33%
1
50.00%
Total
30
100.00%
2
100.00%


#define __pte_page(pte) ((unsigned long)__va(pte_val(pte) & PAGE_MASK))

#define __pmd_page(pmd) ((unsigned long)__va(pmd_val(pmd) & _TABLE_MASK))

#define __pgd_page(pgd) ((unsigned long)__va(pgd_val(pgd) & _TABLE_MASK))



#define pte_none(pte)		(!pte_val(pte))

#define pte_present(pte)	(pte_val(pte) & (_PAGE_PRESENT | _PAGE_PROTNONE))

#define pte_clear(mm,addr,ptep)		({ pte_val(*(ptep)) = 0; })


#define pte_page(pte)		virt_to_page(__va(pte_val(pte)))

#define pte_pfn(pte)		(pte_val(pte) >> PAGE_SHIFT)

#define pfn_pte(pfn, prot)	__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))


#define pmd_none(pmd)		(!pmd_val(pmd))

#define pmd_bad(pmd)		((pmd_val(pmd) & _DESCTYPE_MASK) != _PAGE_TABLE)

#define pmd_present(pmd)	(pmd_val(pmd) & _PAGE_TABLE)

#define pmd_clear(pmdp) ({                      \
        unsigned long *__ptr = pmdp->pmd;       \
        short __i = 16;                         \
        while (--__i >= 0)                      \
                *__ptr++ = 0;                   \
})

#define pmd_page(pmd)		virt_to_page(__va(pmd_val(pmd)))



#define pgd_none(pgd)		(!pgd_val(pgd))

#define pgd_bad(pgd)		((pgd_val(pgd) & _DESCTYPE_MASK) != _PAGE_TABLE)

#define pgd_present(pgd)	(pgd_val(pgd) & _PAGE_TABLE)

#define pgd_clear(pgdp)		({ pgd_val(*pgdp) = 0; })

#define pgd_page(pgd)		(mem_map + ((unsigned long)(__va(pgd_val(pgd)) - PAGE_OFFSET) >> PAGE_SHIFT))


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

#define pmd_ERROR(e) \
	printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))

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


/*
 * The following only work if pte_present() is true.
 * Undefined behaviour if not..
 */


static inline int pte_write(pte_t pte)		{ return !(pte_val(pte) & _PAGE_RONLY); }
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
20
95.24%
1
50.00%
Andrew Morton
1
4.76%
1
50.00%
Total
21
100.00%
2
100.00%



static inline int pte_dirty(pte_t pte)		{ return pte_val(pte) & _PAGE_DIRTY; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
17
94.44%
1
50.00%
Andrew Morton
1
5.56%
1
50.00%
Total
18
100.00%
2
100.00%



static inline int pte_young(pte_t pte)		{ return pte_val(pte) & _PAGE_ACCESSED; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
17
94.44%
1
50.00%
Andrew Morton
1
5.56%
1
50.00%
Total
18
100.00%
2
100.00%



static inline int pte_special(pte_t pte)	{ return 0; }

Contributors
Person
Tokens
Prop
Commits
CommitProp
Nicholas Piggin
13
100.00%
1
100.00%
Total
13
100.00%
1
100.00%



static inline pte_t pte_wrprotect(pte_t pte)	{ pte_val(pte) |= _PAGE_RONLY; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
19
95.00%
1
50.00%
Andrew Morton
1
5.00%
1
50.00%
Total
20
100.00%
2
100.00%



static inline pte_t pte_mkclean(pte_t pte)	{ pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
20
95.24%
1
50.00%
Andrew Morton
1
4.76%
1
50.00%
Total
21
100.00%
2
100.00%



static inline pte_t pte_mkold(pte_t pte)	{ pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
20
95.24%
1
50.00%
Andrew Morton
1
4.76%
1
50.00%
Total
21
100.00%
2
100.00%



static inline pte_t pte_mkwrite(pte_t pte)	{ pte_val(pte) &= ~_PAGE_RONLY; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
20
95.24%
1
50.00%
Andrew Morton
1
4.76%
1
50.00%
Total
21
100.00%
2
100.00%



static inline pte_t pte_mkdirty(pte_t pte)	{ pte_val(pte) |= _PAGE_DIRTY; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
19
95.00%
1
50.00%
Andrew Morton
1
5.00%
1
50.00%
Total
20
100.00%
2
100.00%



static inline pte_t pte_mkyoung(pte_t pte)	{ pte_val(pte) |= _PAGE_ACCESSED; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
19
95.00%
1
50.00%
Andrew Morton
1
5.00%
1
50.00%
Total
20
100.00%
2
100.00%



static inline pte_t pte_mknocache(pte_t pte)
{
	pte_val(pte) = (pte_val(pte) & _CACHEMASK040) | m68k_pgtable_cachemode;
	return pte;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
28
96.55%
1
50.00%
Andrew Morton
1
3.45%
1
50.00%
Total
29
100.00%
2
100.00%



static inline pte_t pte_mkcache(pte_t pte)
{
	pte_val(pte) = (pte_val(pte) & _CACHEMASK040) | m68k_supervisor_cachemode;
	return pte;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
28
96.55%
1
50.00%
Andrew Morton
1
3.45%
1
50.00%
Total
29
100.00%
2
100.00%



static inline pte_t pte_mkspecial(pte_t pte)	{ return pte; }

Contributors
Person
Tokens
Prop
Commits
CommitProp
Nicholas Piggin
13
100.00%
1
100.00%
Total
13
100.00%
1
100.00%


#define PAGE_DIR_OFFSET(tsk,address) pgd_offset((tsk),(address))


#define pgd_index(address)     ((address) >> PGDIR_SHIFT)

/* to find an entry in a page-table-directory */


static inline pgd_t *pgd_offset(const struct mm_struct *mm,
				unsigned long address)
{
	return mm->pgd + pgd_index(address);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
26
92.86%
1
33.33%
Andrew Morton
1
3.57%
1
33.33%
Geert Uytterhoeven
1
3.57%
1
33.33%
Total
28
100.00%
3
100.00%


#define swapper_pg_dir kernel_pg_dir
extern pgd_t kernel_pg_dir[128];



static inline pgd_t *pgd_offset_k(unsigned long address)
{
	return kernel_pg_dir + (address >> PGDIR_SHIFT);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
20
95.24%
1
50.00%
Andrew Morton
1
4.76%
1
50.00%
Total
21
100.00%
2
100.00%

/* Find an entry in the second-level page table.. */


static inline pmd_t *pmd_offset(pgd_t *dir, unsigned long address)
{
	return (pmd_t *)__pgd_page(*dir) + ((address >> PMD_SHIFT) & (PTRS_PER_PMD-1));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
40
97.56%
1
50.00%
Andrew Morton
1
2.44%
1
50.00%
Total
41
100.00%
2
100.00%

/* Find an entry in the third-level page table.. */


static inline pte_t *pte_offset_kernel(pmd_t *pmdp, unsigned long address)
{
	return (pte_t *)__pmd_page(*pmdp) + ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
39
95.12%
1
33.33%
Andrew Morton
1
2.44%
1
33.33%
Geert Uytterhoeven
1
2.44%
1
33.33%
Total
41
100.00%
3
100.00%


#define pte_offset_map(pmdp,address) ((pte_t *)__pmd_page(*pmdp) + (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))

#define pte_unmap(pte)		((void)0)

/*
 * Allocate and free page tables. The xxx_kernel() versions are
 * used to allocate a kernel page table - this turns on ASN bits
 * if any.
 */

/* Prior to calling these routines, the page should have been flushed
 * from both the cache and ATC, or the CPU might not notice that the
 * cache setting for the page has been changed. -jskov
 */


static inline void nocache_page(void *vaddr)
{
	unsigned long addr = (unsigned long)vaddr;

	if (CPU_IS_040_OR_060) {
		pgd_t *dir;
		pmd_t *pmdp;
		pte_t *ptep;

		dir = pgd_offset_k(addr);
		pmdp = pmd_offset(dir, addr);
		ptep = pte_offset_kernel(pmdp, addr);
		*ptep = pte_mknocache(*ptep);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
57
78.08%
1
50.00%
Geert Uytterhoeven
16
21.92%
1
50.00%
Total
73
100.00%
2
100.00%



static inline void cache_page(void *vaddr)
{
	unsigned long addr = (unsigned long)vaddr;

	if (CPU_IS_040_OR_060) {
		pgd_t *dir;
		pmd_t *pmdp;
		pte_t *ptep;

		dir = pgd_offset_k(addr);
		pmdp = pmd_offset(dir, addr);
		ptep = pte_offset_kernel(pmdp, addr);
		*ptep = pte_mkcache(*ptep);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
57
78.08%
1
50.00%
Geert Uytterhoeven
16
21.92%
1
50.00%
Total
73
100.00%
2
100.00%

/* Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e)) */

#define __swp_type(x)		(((x).val >> 4) & 0xff)

#define __swp_offset(x)		((x).val >> 12)

#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 4) | ((offset) << 12) })

#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })

#define __swp_entry_to_pte(x)	((pte_t) { (x).val })

#endif	/* !__ASSEMBLY__ */
#endif /* _MOTOROLA_PGTABLE_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
1005
82.65%
1
7.69%
Geert Uytterhoeven
117
9.62%
4
30.77%
Andrew Morton
48
3.95%
2
15.38%
Nicholas Piggin
26
2.14%
1
7.69%
Dave McCracken
7
0.58%
1
7.69%
Greg Ungerer
4
0.33%
1
7.69%
David S. Miller
4
0.33%
1
7.69%
Roman Zippel
4
0.33%
1
7.69%
Greg Kroah-Hartman
1
0.08%
1
7.69%
Total
1216
100.00%
13
100.00%
Directory: arch/m68k/include/asm

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.