/* * linux/include/asm-arm/pgalloc.h * * Copyright (C) 2000-2001 Russell King * * 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 _ASMARM_PGALLOC_H #define _ASMARM_PGALLOC_H #include <asm/processor.h> #include <asm/cacheflush.h> #include <asm/tlbflush.h> #include <linux/slab.h> extern kmem_cache_t *pte_cache; static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr){ return kmem_cache_alloc(pte_cache, GFP_KERNEL); } static inline void pte_free_kernel(pte_t *pte){ if (pte) kmem_cache_free(pte_cache, pte); } /* * Populate the pmdp entry with a pointer to the pte. This pmd is part * of the mm address space. * * If 'mm' is the init tasks mm, then we are doing a vmalloc, and we * need to set stuff up correctly for it. */ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) { //FIXME - is this doing the right thing? set_pmd(pmdp, (unsigned long)ptep | 1/*FIXME _PMD_PRESENT*/); } /* * FIXME - We use the old 2.5.5-rmk1 hack for this. * This is not truly correct, but should be functional. */ #define pte_alloc_one(mm,addr) ((struct page *)pte_alloc_one_kernel(mm,addr)) #define pte_free(pte) pte_free_kernel((pte_t *)pte) #define pmd_populate(mm,pmdp,ptep) pmd_populate_kernel(mm,pmdp,(pte_t *)ptep) /* * Since we have only two-level page tables, these are trivial * * trick __pmd_alloc into optimising away. The actual value is irrelevant though as it * is thrown away. It just cant be zero. -IM */ #define pmd_alloc_one(mm,addr) ({ BUG(); ((pmd_t *)2); }) #define pmd_free(pmd) do { } while (0) #define pgd_populate(mm,pmd,pte) BUG() extern pgd_t *get_pgd_slow(struct mm_struct *mm); extern void free_pgd_slow(pgd_t *pgd); #define pgd_alloc(mm) get_pgd_slow(mm) #define pgd_free(pgd) free_pgd_slow(pgd) #define check_pgt_cache() do { } while (0) #endif