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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef M68K_MCF_PGALLOC_H #define M68K_MCF_PGALLOC_H
#include <asm/tlb.h> #include <asm/tlbflush.h>
extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) { free_page((unsigned long) pte); }
extern const char bad_pmd_string[];
extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) { unsigned long page = __get_free_page(GFP_DMA);
if (!page) return NULL;
memset((void *)page, 0, PAGE_SIZE); return (pte_t *) (page); }
extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address) { return (pmd_t *) pgd; }
#define pmd_populate(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
#define pmd_populate_kernel pmd_populate
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pgtable, unsigned long address) { struct page *page = virt_to_page(pgtable);
pgtable_pte_page_dtor(page); __free_page(page); }
static inline pgtable_t pte_alloc_one(struct mm_struct *mm) { struct page *page = alloc_pages(GFP_DMA, 0); pte_t *pte;
if (!page) return NULL; if (!pgtable_pte_page_ctor(page)) { __free_page(page); return NULL; }
pte = page_address(page); clear_page(pte);
return pte; }
static inline void pte_free(struct mm_struct *mm, pgtable_t pgtable) { struct page *page = virt_to_page(pgtable);
pgtable_pte_page_dtor(page); __free_page(page); }
/* * In our implementation, each pgd entry contains 1 pmd that is never allocated * or freed. pgd_present is always 1, so this should never be called. -NL */ #define pmd_free(mm, pmd) BUG()
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) { free_page((unsigned long) pgd); }
static inline pgd_t *pgd_alloc(struct mm_struct *mm) { pgd_t *new_pgd;
new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN); if (!new_pgd) return NULL; memcpy(new_pgd, swapper_pg_dir, PTRS_PER_PGD * sizeof(pgd_t)); memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT); return new_pgd; }
#endif /* M68K_MCF_PGALLOC_H */
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