/* 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> #define __HAVE_ARCH_PTE_ALLOC_ONE #include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ /* * Since we have only two-level page tables, these are trivial */ #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); static inline pgtable_t pte_alloc_one(struct mm_struct *mm) { pgtable_t pte; pte = __pte_alloc_one(mm, GFP_PGTABLE_USER); if (pte) cpu_dcache_wb_page((unsigned long)page_address(pte)); return 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