Release 4.14 arch/frv/include/asm/pgtable.h

/* pgtable.h: FR-V page table mangling
 *
 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * Derived from:
 *      include/asm-m68knommu/pgtable.h
 *      include/asm-i386/pgtable.h
 */

#ifndef _ASM_PGTABLE_H

#define _ASM_PGTABLE_H

#include <asm-generic/5level-fixup.h>
#include <asm/mem-layout.h>
#include <asm/setup.h>
#include <asm/processor.h>

#ifndef __ASSEMBLY__
#include <linux/threads.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
struct vm_area_struct;
#endif

#ifndef __ASSEMBLY__
#if defined(CONFIG_HIGHPTE)

typedef unsigned long pte_addr_t;
#else

typedef pte_t *pte_addr_t;
#endif
#endif

/*****************************************************************************/
/*
 * MMU-less operation case first
 */
#ifndef CONFIG_MMU


#define pgd_present(pgd)	(1)		
/* pages are always present on NO_MM */

#define pgd_none(pgd)		(0)

#define pgd_bad(pgd)		(0)

#define pgd_clear(pgdp)

#define kern_addr_valid(addr)	(1)

#define	pmd_offset(a, b)	((void *) 0)


#define PAGE_NONE		__pgprot(0)	
/* these mean nothing to NO_MM */

#define PAGE_SHARED		__pgprot(0)	
/* these mean nothing to NO_MM */

#define PAGE_COPY		__pgprot(0)	
/* these mean nothing to NO_MM */

#define PAGE_READONLY		__pgprot(0)	
/* these mean nothing to NO_MM */

#define PAGE_KERNEL		__pgprot(0)	
/* these mean nothing to NO_MM */


#define __swp_type(x)		(0)

#define __swp_offset(x)		(0)

#define __swp_entry(typ,off)	((swp_entry_t) { ((typ) | ((off) << 7)) })

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

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


#define ZERO_PAGE(vaddr)	({ BUG(); NULL; })


#define swapper_pg_dir		((pgd_t *) NULL)


#define pgtable_cache_init()		do {} while (0)

#include <asm-generic/pgtable.h>

#else /* !CONFIG_MMU */
/*****************************************************************************/
/*
 * then MMU operation
 */

/*
 * ZERO_PAGE is a global shared page that is always zero: used
 * for zero-mapped memory areas etc..
 */
#ifndef __ASSEMBLY__
extern unsigned long empty_zero_page;

#define ZERO_PAGE(vaddr)	virt_to_page(empty_zero_page)
#endif

/*
 * we use 2-level page tables, folding the PMD (mid-level table) into the PGE (top-level entry)
 * [see Documentation/frv/mmu-layout.txt]
 *
 * Page Directory:
 *  - Size: 16KB
 *  - 64 PGEs per PGD
 *  - Each PGE holds 1 PUD and covers 64MB
 *
 * Page Upper Directory:
 *  - Size: 256B
 *  - 1 PUE per PUD
 *  - Each PUE holds 1 PMD and covers 64MB
 *
 * Page Mid-Level Directory
 *  - Size: 256B
 *  - 1 PME per PMD
 *  - Each PME holds 64 STEs, all of which point to separate chunks of the same Page Table
 *  - All STEs are instantiated at the same time
 *
 * Page Table
 *  - Size: 16KB
 *  - 4096 PTEs per PT
 *  - Each Linux PT is subdivided into 64 FR451 PT's, each of which holds 64 entries
 *
 * Pages
 *  - Size: 4KB
 *
 * total PTEs
 *      = 1 PML4E * 64 PGEs * 1 PUEs * 1 PMEs * 4096 PTEs
 *      = 1 PML4E * 64 PGEs * 64 STEs * 64 PTEs/FR451-PT
 *      = 262144 (or 256 * 1024)
 */

#define PGDIR_SHIFT		26

#define PGDIR_SIZE		(1UL << PGDIR_SHIFT)

#define PGDIR_MASK		(~(PGDIR_SIZE - 1))

#define PTRS_PER_PGD		64


#define __PAGETABLE_PUD_FOLDED

#define PUD_SHIFT		26

#define PTRS_PER_PUD		1

#define PUD_SIZE		(1UL << PUD_SHIFT)

#define PUD_MASK		(~(PUD_SIZE - 1))

#define PUE_SIZE		256


#define __PAGETABLE_PMD_FOLDED

#define PMD_SHIFT		26

#define PMD_SIZE		(1UL << PMD_SHIFT)

#define PMD_MASK		(~(PMD_SIZE - 1))

#define PTRS_PER_PMD		1

#define PME_SIZE		256


#define __frv_PT_SIZE		256


#define PTRS_PER_PTE		4096


#define USER_PGDS_IN_LAST_PML4	(TASK_SIZE / PGDIR_SIZE)

#define FIRST_USER_ADDRESS	0UL


#define USER_PGD_PTRS		(PAGE_OFFSET >> PGDIR_SHIFT)

#define KERNEL_PGD_PTRS		(PTRS_PER_PGD - USER_PGD_PTRS)


#define TWOLEVEL_PGDIR_SHIFT	26

#define BOOT_USER_PGD_PTRS	(__PAGE_OFFSET >> TWOLEVEL_PGDIR_SHIFT)

#define BOOT_KERNEL_PGD_PTRS	(PTRS_PER_PGD - BOOT_USER_PGD_PTRS)

#ifndef __ASSEMBLY__

extern pgd_t swapper_pg_dir[PTRS_PER_PGD];


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

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

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

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

/*
 * Certain architectures need to do special things when PTEs
 * within a page table are directly modified.  Thus, the following
 * hook is made available.
 */

#define set_pte(pteptr, pteval)				\
do {                                                    \
        *(pteptr) = (pteval);                           \
        asm volatile("dcf %M0" :: "U"(*pteptr));        \
} while(0)

#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)

/*
 * pgd_offset() returns a (pgd_t *)
 * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
 */

#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))

/*
 * a shortcut which implies the use of the kernel's pgd, instead
 * of a process's
 */

#define pgd_offset_k(address) pgd_offset(&init_mm, address)

/*
 * The "pgd_xxx()" functions here are trivial for a folded two-level
 * setup: the pud is never bad, and a pud always exists (as it's folded
 * into the pgd entry)
 */


static inline int pgd_none(pgd_t pgd)		{ return 0; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
13
100.00%
1
100.00%
Total
13
100.00%
1
100.00%



static inline int pgd_bad(pgd_t pgd)		{ return 0; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
13
100.00%
1
100.00%
Total
13
100.00%
1
100.00%



static inline int pgd_present(pgd_t pgd)	{ return 1; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
13
100.00%
1
100.00%
Total
13
100.00%
1
100.00%



static inline void pgd_clear(pgd_t *pgd)	{ }

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
10
100.00%
1
100.00%
Total
10
100.00%
1
100.00%


#define pgd_populate(mm, pgd, pud)		do { } while (0)
/*
 * (puds are folded into pgds so this doesn't get actually called,
 * but the define is needed for a generic inline function.)
 */

#define set_pgd(pgdptr, pgdval)				\
do {                                                    \
        memcpy((pgdptr), &(pgdval), sizeof(pgd_t));     \
        asm volatile("dcf %M0" :: "U"(*(pgdptr)));      \
} while(0)



static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)
{
	return (pud_t *) pgd;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
23
100.00%
1
100.00%
Total
23
100.00%
1
100.00%


#define pgd_page(pgd)				(pud_page((pud_t){ pgd }))

#define pgd_page_vaddr(pgd)			(pud_page_vaddr((pud_t){ pgd }))

/*
 * allocating and freeing a pud is trivial: the 1-entry pud is
 * inside the pgd, so has no extra memory associated with it.
 */

#define pud_alloc_one(mm, address)		NULL

#define pud_free(mm, x)				do { } while (0)

#define __pud_free_tlb(tlb, x, address)		do { } while (0)

/*
 * The "pud_xxx()" functions here are trivial for a folded two-level
 * setup: the pmd is never bad, and a pmd always exists (as it's folded
 * into the pud entry)
 */


static inline int pud_none(pud_t pud)		{ return 0; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
13
100.00%
1
100.00%
Total
13
100.00%
1
100.00%



static inline int pud_bad(pud_t pud)		{ return 0; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
13
100.00%
1
100.00%
Total
13
100.00%
1
100.00%



static inline int pud_present(pud_t pud)	{ return 1; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
13
100.00%
1
100.00%
Total
13
100.00%
1
100.00%



static inline void pud_clear(pud_t *pud)	{ }

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
10
100.00%
1
100.00%
Total
10
100.00%
1
100.00%


#define pud_populate(mm, pmd, pte)		do { } while (0)

/*
 * (pmds are folded into puds so this doesn't get actually called,
 * but the define is needed for a generic inline function.)
 */

#define set_pud(pudptr, pudval)			set_pmd((pmd_t *)(pudptr), (pmd_t) { pudval })


#define pud_page(pud)				(pmd_page((pmd_t){ pud }))

#define pud_page_vaddr(pud)			(pmd_page_vaddr((pmd_t){ pud }))

/*
 * (pmds are folded into pgds so this doesn't get actually called,
 * but the define is needed for a generic inline function.)
 */
extern void __set_pmd(pmd_t *pmdptr, unsigned long __pmd);


#define set_pmd(pmdptr, pmdval)			\
do {                                            \
        __set_pmd((pmdptr), (pmdval).ste[0]);   \
} while(0)


#define __pmd_index(address)			0



static inline pmd_t *pmd_offset(pud_t *dir, unsigned long address)
{
	return (pmd_t *) dir + __pmd_index(address);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
28
100.00%
2
100.00%
Total
28
100.00%
2
100.00%


#define pte_same(a, b)		((a).pte == (b).pte)

#define pte_page(x)		(mem_map + ((unsigned long)(((x).pte >> PAGE_SHIFT))))

#define pte_none(x)		(!(x).pte)

#define pte_pfn(x)		((unsigned long)(((x).pte >> PAGE_SHIFT)))

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

#define pfn_pmd(pfn, prot)	__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))


#define VMALLOC_VMADDR(x)	((unsigned long) (x))

#endif /* !__ASSEMBLY__ */

/*
 * control flags in AMPR registers and TLB entries
 */

#define _PAGE_BIT_PRESENT	xAMPRx_V_BIT

#define _PAGE_BIT_WP		DAMPRx_WP_BIT

#define _PAGE_BIT_NOCACHE	xAMPRx_C_BIT

#define _PAGE_BIT_SUPER		xAMPRx_S_BIT

#define _PAGE_BIT_ACCESSED	xAMPRx_RESERVED8_BIT

#define _PAGE_BIT_DIRTY		xAMPRx_M_BIT

#define _PAGE_BIT_NOTGLOBAL	xAMPRx_NG_BIT


#define _PAGE_PRESENT		xAMPRx_V

#define _PAGE_WP		DAMPRx_WP

#define _PAGE_NOCACHE		xAMPRx_C

#define _PAGE_SUPER		xAMPRx_S

#define _PAGE_ACCESSED		xAMPRx_RESERVED8	
/* accessed if set */

#define _PAGE_DIRTY		xAMPRx_M

#define _PAGE_NOTGLOBAL		xAMPRx_NG


#define _PAGE_RESERVED_MASK	(xAMPRx_RESERVED8 | xAMPRx_RESERVED13)


#define _PAGE_PROTNONE		0x000	
/* If not present */


#define _PAGE_CHG_MASK		(PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)


#define __PGPROT_BASE \
	(_PAGE_PRESENT | xAMPRx_SS_16Kb | xAMPRx_D | _PAGE_NOTGLOBAL | _PAGE_ACCESSED)


#define PAGE_NONE	__pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)

#define PAGE_SHARED	__pgprot(__PGPROT_BASE)

#define PAGE_COPY	__pgprot(__PGPROT_BASE | _PAGE_WP)

#define PAGE_READONLY	__pgprot(__PGPROT_BASE | _PAGE_WP)


#define __PAGE_KERNEL		(__PGPROT_BASE | _PAGE_SUPER | _PAGE_DIRTY)

#define __PAGE_KERNEL_NOCACHE	(__PGPROT_BASE | _PAGE_SUPER | _PAGE_DIRTY | _PAGE_NOCACHE)

#define __PAGE_KERNEL_RO	(__PGPROT_BASE | _PAGE_SUPER | _PAGE_DIRTY | _PAGE_WP)


#define MAKE_GLOBAL(x) __pgprot((x) & ~_PAGE_NOTGLOBAL)


#define PAGE_KERNEL		MAKE_GLOBAL(__PAGE_KERNEL)

#define PAGE_KERNEL_RO		MAKE_GLOBAL(__PAGE_KERNEL_RO)

#define PAGE_KERNEL_NOCACHE	MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE)


#define _PAGE_TABLE		(_PAGE_PRESENT | xAMPRx_SS_16Kb)

#ifndef __ASSEMBLY__

/*
 * The FR451 can do execute protection by virtue of having separate TLB miss handlers for
 * instruction access and for data access. However, we don't have enough reserved bits to say
 * "execute only", so we don't bother. If you can read it, you can execute it and vice versa.
 */

#define __P000	PAGE_NONE

#define __P001	PAGE_READONLY

#define __P010	PAGE_COPY

#define __P011	PAGE_COPY

#define __P100	PAGE_READONLY

#define __P101	PAGE_READONLY

#define __P110	PAGE_COPY

#define __P111	PAGE_COPY


#define __S000	PAGE_NONE

#define __S001	PAGE_READONLY

#define __S010	PAGE_SHARED

#define __S011	PAGE_SHARED

#define __S100	PAGE_READONLY

#define __S101	PAGE_READONLY

#define __S110	PAGE_SHARED

#define __S111	PAGE_SHARED

/*
 * Define this to warn about kernel memory accesses that are
 * done without a 'access_ok(VERIFY_WRITE,..)'
 */

#undef TEST_ACCESS_OK


#define pte_present(x)	(pte_val(x) & _PAGE_PRESENT)

#define pte_clear(mm,addr,xp)	do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)


#define pmd_none(x)	(!pmd_val(x))

#define pmd_present(x)	(pmd_val(x) & _PAGE_PRESENT)

#define	pmd_bad(x)	(pmd_val(x) & xAMPRx_SS)

#define pmd_clear(xp)	do { __set_pmd(xp, 0); } while(0)


#define pmd_page_vaddr(pmd) \
	((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))

#ifndef CONFIG_DISCONTIGMEM

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


#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))

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


static inline int pte_dirty(pte_t pte)		{ return (pte).pte & _PAGE_DIRTY; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
19
100.00%
1
100.00%
Total
19
100.00%
1
100.00%



static inline int pte_young(pte_t pte)		{ return (pte).pte & _PAGE_ACCESSED; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
19
100.00%
1
100.00%
Total
19
100.00%
1
100.00%



static inline int pte_write(pte_t pte)		{ return !((pte).pte & _PAGE_WP); }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
22
100.00%
1
100.00%
Total
22
100.00%
1
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_mkclean(pte_t pte)	{ (pte).pte &= ~_PAGE_DIRTY; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
22
100.00%
1
100.00%
Total
22
100.00%
1
100.00%



static inline pte_t pte_mkold(pte_t pte)	{ (pte).pte &= ~_PAGE_ACCESSED; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
22
100.00%
1
100.00%
Total
22
100.00%
1
100.00%



static inline pte_t pte_wrprotect(pte_t pte)	{ (pte).pte |= _PAGE_WP; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
21
100.00%
1
100.00%
Total
21
100.00%
1
100.00%



static inline pte_t pte_mkdirty(pte_t pte)	{ (pte).pte |= _PAGE_DIRTY; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
21
100.00%
1
100.00%
Total
21
100.00%
1
100.00%



static inline pte_t pte_mkyoung(pte_t pte)	{ (pte).pte |= _PAGE_ACCESSED; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
21
100.00%
1
100.00%
Total
21
100.00%
1
100.00%



static inline pte_t pte_mkwrite(pte_t pte)	{ (pte).pte &= ~_PAGE_WP; return pte; }
Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
22
100.00%
1
100.00%
Total
22
100.00%
1
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%



static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
{
	int i = test_and_clear_bit(_PAGE_BIT_ACCESSED, ptep);
	asm volatile("dcf %M0" :: "U"(*ptep));
	return i;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
27
75.00%
1
50.00%
David S. Miller
9
25.00%
1
50.00%
Total
36
100.00%
2
100.00%



static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
	unsigned long x = xchg(&ptep->pte, 0);
	asm volatile("dcf %M0" :: "U"(*ptep));
	return __pte(x);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
34
79.07%
1
50.00%
David S. Miller
9
20.93%
1
50.00%
Total
43
100.00%
2
100.00%



static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
	set_bit(_PAGE_BIT_WP, ptep);
	asm volatile("dcf %M0" :: "U"(*ptep));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
21
70.00%
1
50.00%
David S. Miller
9
30.00%
1
50.00%
Total
30
100.00%
2
100.00%

/*
 * Macro to mark a page protection value as "uncacheable"
 */

#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) | _PAGE_NOCACHE))

/*
 * 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))

#define mk_pte_huge(entry)	((entry).pte_low |= _PAGE_PRESENT | _PAGE_PSE)

/* This takes a physical page address that is used by the remapping functions */

#define mk_pte_phys(physpage, pgprot)	pfn_pte((physpage) >> PAGE_SHIFT, pgprot)



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
31
100.00%
1
100.00%
Total
31
100.00%
1
100.00%

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

#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))

#define pgd_index_k(addr) pgd_index(addr)

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

#define __pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))

/*
 * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
 *
 * this macro returns the index of the entry in the pte page which would
 * control the given virtual address
 */

#define pte_index(address) \
		(((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))

#define pte_offset_kernel(dir, address) \
	((pte_t *) pmd_page_vaddr(*(dir)) +  pte_index(address))

#if defined(CONFIG_HIGHPTE)

#define pte_offset_map(dir, address) \
	((pte_t *)kmap_atomic(pmd_page(*(dir))) + pte_index(address))

#define pte_unmap(pte) kunmap_atomic(pte)
#else

#define pte_offset_map(dir, address) \
	((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))

#define pte_unmap(pte) do { } while (0)
#endif

/*
 * Handle swap and file entries
 * - the PTE is encoded in the following format:
 *      bit 0:          Must be 0 (!_PAGE_PRESENT)
 *      bits 1-6:       Swap type
 *      bits 7-31:      Swap offset
 */

#define __swp_type(x)			(((x).val >> 1) & 0x1f)

#define __swp_offset(x)			((x).val >> 7)

#define __swp_entry(type, offset)	((swp_entry_t) { ((type) << 1) | ((offset) << 7) })

#define __pte_to_swp_entry(_pte)	((swp_entry_t) { (_pte).pte })

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

/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */

#define PageSkip(page)		(0)

#define kern_addr_valid(addr)	(1)


#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG

#define __HAVE_ARCH_PTEP_GET_AND_CLEAR

#define __HAVE_ARCH_PTEP_SET_WRPROTECT

#define __HAVE_ARCH_PTE_SAME
#include <asm-generic/pgtable.h>

/*
 * preload information about a newly instantiated PTE into the SCR0/SCR1 PGE cache
 */


static inline void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep)
{
	struct mm_struct *mm;
	unsigned long ampr;

	mm = current->mm;
	if (mm) {
		pgd_t *pge = pgd_offset(mm, address);
		pud_t *pue = pud_offset(pge, address);
		pmd_t *pme = pmd_offset(pue, address);

		ampr = pme->ste[0] & 0xffffff00;
		ampr |= xAMPRx_L | xAMPRx_SS_16Kb | xAMPRx_S | xAMPRx_C |
			xAMPRx_V;
	} else {
		address = ULONG_MAX;
		ampr = 0;
	}

	asm volatile("movgs %0,scr0\n"
                     "movgs %0,scr1\n"
                     "movgs %1,dampr4\n"
                     "movgs %1,dampr5\n"
                     :
                     : "r"(address), "r"(ampr)
                     );
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
109
98.20%
3
75.00%
Russell King
2
1.80%
1
25.00%
Total
111
100.00%
4
100.00%

#ifdef CONFIG_PROC_FS
extern char *proc_pid_status_frv_cxnr(struct mm_struct *mm, char *buffer);
#endif

extern void __init pgtable_cache_init(void);

#endif /* !__ASSEMBLY__ */
#endif /* !CONFIG_MMU */

#ifndef __ASSEMBLY__
extern void __init paging_init(void);
#endif /* !__ASSEMBLY__ */

#define HAVE_ARCH_UNMAPPED_AREA

#endif /* _ASM_PGTABLE_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
David Howells
1613
93.40%
7
28.00%
David S. Miller
45
2.61%
1
4.00%
Nicholas Piggin
26
1.51%
1
4.00%
Kirill A. Shutemov
14
0.81%
4
16.00%
Dave McCracken
6
0.35%
1
4.00%
Benjamin Herrenschmidt
4
0.23%
2
8.00%
Tim Schmielau
3
0.17%
1
4.00%
Alexey Dobriyan
3
0.17%
1
4.00%
Al Viro
3
0.17%
1
4.00%
Jesper Juhl
2
0.12%
1
4.00%
Peter Zijlstra
2
0.12%
1
4.00%
Russell King
2
0.12%
1
4.00%
Roel Kluin
2
0.12%
1
4.00%
Hugh Dickins
1
0.06%
1
4.00%
Adrian Bunk
1
0.06%
1
4.00%
Total
1727
100.00%
25
100.00%
Directory: arch/frv/include/asm

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