| /* | |
| * linux/arch/unicore32/include/asm/pgalloc.h | |
| * | |
| * Code specific to PKUnity SoC and UniCore ISA | |
| * | |
| * Copyright (C) 2001-2010 GUAN Xue-tao | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License version 2 as | |
| * published by the Free Software Foundation. | |
| */ | |
| #ifndef __UNICORE_PGALLOC_H__ | |
| #define __UNICORE_PGALLOC_H__ | |
| #include <asm/pgtable-hwdef.h> | |
| #include <asm/processor.h> | |
| #include <asm/cacheflush.h> | |
| #include <asm/tlbflush.h> | |
| #define check_pgt_cache() do { } while (0) | |
| #define _PAGE_USER_TABLE (PMD_TYPE_TABLE | PMD_PRESENT) | |
| #define _PAGE_KERNEL_TABLE (PMD_TYPE_TABLE | PMD_PRESENT) | |
| extern pgd_t *get_pgd_slow(struct mm_struct *mm); | |
| extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd); | |
| #define pgd_alloc(mm) get_pgd_slow(mm) | |
| #define pgd_free(mm, pgd) free_pgd_slow(mm, pgd) | |
| #define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO) | |
| /* | |
| * Allocate one PTE table. | |
| */ | |
| static inline pte_t * | |
| pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) | |
| { | |
| pte_t *pte; | |
| pte = (pte_t *)__get_free_page(PGALLOC_GFP); | |
| if (pte) | |
| clean_dcache_area(pte, PTRS_PER_PTE * sizeof(pte_t)); | |
| return pte; | |
| } | |
| static inline pgtable_t | |
| pte_alloc_one(struct mm_struct *mm, unsigned long addr) | |
| { | |
| struct page *pte; | |
| pte = alloc_pages(PGALLOC_GFP, 0); | |
| if (pte) { | |
| if (!PageHighMem(pte)) { | |
| void *page = page_address(pte); | |
| clean_dcache_area(page, PTRS_PER_PTE * sizeof(pte_t)); | |
| } | |
| pgtable_page_ctor(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) | |
| { | |
| pgtable_page_dtor(pte); | |
| __free_page(pte); | |
| } | |
| static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval) | |
| { | |
| set_pmd(pmdp, __pmd(pmdval)); | |
| flush_pmd_entry(pmdp); | |
| } | |
| /* | |
| * Populate the pmdp entry with a pointer to the pte. This pmd is part | |
| * of the mm address space. | |
| */ | |
| static inline void | |
| pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) | |
| { | |
| unsigned long pte_ptr = (unsigned long)ptep; | |
| /* | |
| * The pmd must be loaded with the physical | |
| * address of the PTE table | |
| */ | |
| __pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE); | |
| } | |
| static inline void | |
| pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) | |
| { | |
| __pmd_populate(pmdp, | |
| page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE); | |
| } | |
| #define pmd_pgtable(pmd) pmd_page(pmd) | |
| #endif |