#ifndef __ASM_SH64_PGALLOC_H #define __ASM_SH64_PGALLOC_H /* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * include/asm-sh64/pgalloc.h * * Copyright (C) 2000, 2001 Paolo Alberelli * Copyright (C) 2003, 2004 Paul Mundt * Copyright (C) 2003, 2004 Richard Curnow * */ #include <linux/mm.h> #include <linux/quicklist.h> #include <asm/page.h> static inline void pgd_init(unsigned long page) { unsigned long *pgd = (unsigned long *)page; extern pte_t empty_bad_pte_table[PTRS_PER_PTE]; int i; for (i = 0; i < USER_PTRS_PER_PGD; i++) pgd[i] = (unsigned long)empty_bad_pte_table; } /* * Allocate and free page tables. The xxx_kernel() versions are * used to allocate a kernel page table - this turns on ASN bits * if any. */ static inline pgd_t *get_pgd_slow(void) { unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t)); pgd_t *ret = kmalloc(pgd_size, GFP_KERNEL); return ret; } static inline pgd_t *pgd_alloc(struct mm_struct *mm) { return quicklist_alloc(0, GFP_KERNEL, NULL); } static inline void pgd_free(pgd_t *pgd) { quicklist_free(0, NULL, pgd); } static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address) { void *pg = quicklist_alloc(0, GFP_KERNEL, NULL); return pg ? virt_to_page(pg) : NULL; } static inline void pte_free_kernel(pte_t *pte) { quicklist_free(0, NULL, pte); } static inline void pte_free(struct page *pte) { quicklist_free_page(0, NULL, pte); } static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) { return quicklist_alloc(0, GFP_KERNEL, NULL); } #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) /* * allocating and freeing a pmd is trivial: the 1-entry pmd is * inside the pgd, so has no extra memory associated with it. */ #if defined(CONFIG_SH64_PGTABLE_2_LEVEL) #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) #define pmd_free(x) do { } while (0) #define pgd_populate(mm, pmd, pte) BUG() #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) #define __pmd_free_tlb(tlb,pmd) do { } while (0) #elif defined(CONFIG_SH64_PGTABLE_3_LEVEL) static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) { return quicklist_alloc(0, GFP_KERNEL, NULL); } static inline void pmd_free(pmd_t *pmd) { quicklist_free(0, NULL, pmd); } #define pgd_populate(mm, pgd, pmd) pgd_set(pgd, pmd) #define __pmd_free_tlb(tlb,pmd) pmd_free(pmd) #else #error "No defined page table size" #endif #define pmd_populate_kernel(mm, pmd, pte) \ set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) (pte))) static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte) { set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) page_address (pte))); } static inline void check_pgt_cache(void) { quicklist_trim(0, NULL, 25, 16); } #endif /* __ASM_SH64_PGALLOC_H */