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/*
 * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
 * Copyright (C) 2012 Regents of the University of California
 *
 *   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, version 2.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 */

#ifndef _ASM_RISCV_PGALLOC_H
#define _ASM_RISCV_PGALLOC_H

#include <linux/mm.h>
#include <asm/tlb.h>

static inline void pmd_populate_kernel(struct mm_struct *mm,
	pmd_t *pmd, pte_t *pte)
{
	unsigned long pfn = virt_to_pfn(pte);

	set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
}

static inline void pmd_populate(struct mm_struct *mm,
	pmd_t *pmd, pgtable_t pte)
{
	unsigned long pfn = virt_to_pfn(page_address(pte));

	set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
}

#ifndef __PAGETABLE_PMD_FOLDED
static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
{
	unsigned long pfn = virt_to_pfn(pmd);

	set_pud(pud, __pud((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
}
#endif /* __PAGETABLE_PMD_FOLDED */

#define pmd_pgtable(pmd)	pmd_page(pmd)

static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
	pgd_t *pgd;

	pgd = (pgd_t *)__get_free_page(GFP_KERNEL);
	if (likely(pgd != NULL)) {
		memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
		/* Copy kernel mappings */
		memcpy(pgd + USER_PTRS_PER_PGD,
			init_mm.pgd + USER_PTRS_PER_PGD,
			(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
	}
	return pgd;
}

static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
	free_page((unsigned long)pgd);
}

#ifndef __PAGETABLE_PMD_FOLDED

static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
	return (pmd_t *)__get_free_page(
		GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_ZERO);
}

static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
{
	free_page((unsigned long)pmd);
}

#define __pmd_free_tlb(tlb, pmd, addr)  pmd_free((tlb)->mm, pmd)

#endif /* __PAGETABLE_PMD_FOLDED */

static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
	unsigned long address)
{
	return (pte_t *)__get_free_page(
		GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_ZERO);
}

static inline struct page *pte_alloc_one(struct mm_struct *mm,
	unsigned long address)
{
	struct page *pte;

	pte = alloc_page(GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_ZERO);
	if (likely(pte != NULL))
		pgtable_page_ctor(pte);
	return pte;
}

static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
	free_page((unsigned long)pte);
}

static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
	pgtable_page_dtor(pte);
	__free_page(pte);
}

#define __pte_free_tlb(tlb, pte, buf)   \
do {                                    \
	pgtable_page_dtor(pte);         \
	tlb_remove_page((tlb), pte);    \
} while (0)

static inline void check_pgt_cache(void)
{
}

#endif /* _ASM_RISCV_PGALLOC_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 1.37 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 176 B 0644
asm.h File 1.78 KB 0644
atomic.h File 11.31 KB 0644
barrier.h File 2.59 KB 0644
bitops.h File 6.23 KB 0644
bug.h File 2.12 KB 0644
cache.h File 745 B 0644
cacheflush.h File 1.7 KB 0644
cmpxchg.h File 3.35 KB 0644
compat.h File 924 B 0644
csr.h File 3.8 KB 0644
current.h File 1.27 KB 0644
delay.h File 881 B 0644
dma-mapping.h File 1.19 KB 0644
elf.h File 2.3 KB 0644
fence.h File 279 B 0644
hwcap.h File 1013 B 0644
io.h File 11.81 KB 0644
irq.h File 841 B 0644
irqflags.h File 1.54 KB 0644
kprobes.h File 679 B 0644
linkage.h File 677 B 0644
mmu.h File 829 B 0644
mmu_context.h File 3.14 KB 0644
page.h File 3.76 KB 0644
pci.h File 1.16 KB 0644
pgalloc.h File 3.06 KB 0644
pgtable-32.h File 870 B 0644
pgtable-64.h File 2.08 KB 0644
pgtable-bits.h File 1.81 KB 0644
pgtable.h File 11.17 KB 0644
processor.h File 2.44 KB 0644
ptrace.h File 2.69 KB 0644
sbi.h File 2.6 KB 0644
smp.h File 1.59 KB 0644
spinlock.h File 2.85 KB 0644
spinlock_types.h File 906 B 0644
string.h File 838 B 0644
switch_to.h File 1.86 KB 0644
syscall.h File 2.59 KB 0644
thread_info.h File 3.11 KB 0644
timex.h File 1.29 KB 0644
tlb.h File 717 B 0644
tlbflush.h File 1.83 KB 0644
uaccess.h File 14 KB 0644
unistd.h File 638 B 0644
vdso.h File 1.49 KB 0644
word-at-a-time.h File 1.48 KB 0644