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- // SPDX-License-Identifier: GPL-2.0
- // Copyright (C) 2005-2017 Andes Technology Corporation
- #ifndef _ASMNDS32_PGALLOC_H
- #define _ASMNDS32_PGALLOC_H
- #include <asm/processor.h>
- #include <asm/cacheflush.h>
- #include <asm/tlbflush.h>
- #include <asm/proc-fns.h>
- /*
- * Since we have only two-level page tables, these are trivial
- */
- #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
- #define pmd_free(mm, pmd) do { } while (0)
- #define pgd_populate(mm, pmd, pte) BUG()
- #define pmd_pgtable(pmd) pmd_page(pmd)
- extern pgd_t *pgd_alloc(struct mm_struct *mm);
- extern void pgd_free(struct mm_struct *mm, pgd_t * pgd);
- #define check_pgt_cache() do { } while (0)
- static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
- unsigned long addr)
- {
- pte_t *pte;
- pte =
- (pte_t *) __get_free_page(GFP_KERNEL | __GFP_RETRY_MAYFAIL |
- __GFP_ZERO);
- return pte;
- }
- static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr)
- {
- pgtable_t pte;
- pte = alloc_pages(GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_ZERO, 0);
- if (pte)
- cpu_dcache_wb_page((unsigned long)page_address(pte));
- return pte;
- }
- /*
- * Free one PTE table.
- */
- static inline void pte_free_kernel(struct mm_struct *mm, pte_t * pte)
- {
- if (pte) {
- free_page((unsigned long)pte);
- }
- }
- static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
- {
- __free_page(pte);
- }
- /*
- * Populate the pmdp entry with a pointer to the pte. This pmd is part
- * of the mm address space.
- *
- * Ensure that we always set both PMD entries.
- */
- static inline void
- pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmdp, pte_t * ptep)
- {
- unsigned long pte_ptr = (unsigned long)ptep;
- unsigned long pmdval;
- BUG_ON(mm != &init_mm);
- /*
- * The pmd must be loaded with the physical
- * address of the PTE table
- */
- pmdval = __pa(pte_ptr) | _PAGE_KERNEL_TABLE;
- set_pmd(pmdp, __pmd(pmdval));
- }
- static inline void
- pmd_populate(struct mm_struct *mm, pmd_t * pmdp, pgtable_t ptep)
- {
- unsigned long pmdval;
- BUG_ON(mm == &init_mm);
- pmdval = page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE;
- set_pmd(pmdp, __pmd(pmdval));
- }
- #endif
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