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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#ifndef _ASM_PGALLOC_H
#define _ASM_PGALLOC_H
#include <linux/mm.h>
#include <linux/sched.h>
#define __HAVE_ARCH_PMD_ALLOC_ONE
#define __HAVE_ARCH_PUD_ALLOC_ONE
#include <asm-generic/pgalloc.h>
static inline void pmd_populate_kernel(struct mm_struct *mm,
pmd_t *pmd, pte_t *pte)
{
set_pmd(pmd, __pmd((unsigned long)pte));
}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
{
set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
}
#ifndef __PAGETABLE_PMD_FOLDED
static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
{
set_pud(pud, __pud((unsigned long)pmd));
}
#endif
#ifndef __PAGETABLE_PUD_FOLDED
static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
{
set_p4d(p4d, __p4d((unsigned long)pud));
}
#endif /* __PAGETABLE_PUD_FOLDED */
extern void pagetable_init(void);
extern pgd_t *pgd_alloc(struct mm_struct *mm);
#define __pte_free_tlb(tlb, pte, address) \
do { \
pagetable_pte_dtor(page_ptdesc(pte)); \
tlb_remove_page_ptdesc((tlb), page_ptdesc(pte)); \
} while (0)
#ifndef __PAGETABLE_PMD_FOLDED
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
pmd_t *pmd;
struct ptdesc *ptdesc;
ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, 0);
if (!ptdesc)
return NULL;
if (!pagetable_pmd_ctor(ptdesc)) {
pagetable_free(ptdesc);
return NULL;
}
pmd = ptdesc_address(ptdesc);
pmd_init(pmd);
return pmd;
}
#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
#endif
#ifndef __PAGETABLE_PUD_FOLDED
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
{
pud_t *pud;
struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL & ~__GFP_HIGHMEM, 0);
if (!ptdesc)
return NULL;
pagetable_pud_ctor(ptdesc);
pud = ptdesc_address(ptdesc);
pud_init(pud);
return pud;
}
#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
#endif /* __PAGETABLE_PUD_FOLDED */
extern pte_t * __init populate_kernel_pte(unsigned long addr);
#endif /* _ASM_PGALLOC_H */