#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/threads.h>#include <linux/mm.h> #define pgd_quicklist (current_cpu_data.pgd_quick)#define pmd_quicklist (current_cpu_data.pmd_quick)#define pte_quicklist (current_cpu_data.pte_quick)#define pgtable_cache_size (current_cpu_data.pgtable_cache_sz) 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 *get_pgd_fast(void){	unsigned long *ret; 	if ((ret = pgd_quicklist) != NULL) {		pgd_quicklist = (unsigned long *)(*ret);		ret[0] = 0;		pgtable_cache_size--;	} else		ret = (unsigned long *)get_pgd_slow(); 	if (ret) {		memset(ret, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));	}	return (pgd_t *)ret;} static inline void free_pgd_fast(pgd_t *pgd){	*(unsigned long *)pgd = (unsigned long) pgd_quicklist;	pgd_quicklist = (unsigned long *) pgd;	pgtable_cache_size++;} static inline void free_pgd_slow(pgd_t *pgd){	kfree((void *)pgd);} extern pte_t *get_pte_slow(pmd_t *pmd, unsigned long address_preadjusted);extern pte_t *get_pte_kernel_slow(pmd_t *pmd, unsigned long address_preadjusted); static inline pte_t *get_pte_fast(void){	unsigned long *ret; 	if((ret = (unsigned long *)pte_quicklist) != NULL) {		pte_quicklist = (unsigned long *)(*ret);		ret[0] = ret[1];		pgtable_cache_size--;	}	return (pte_t *)ret;} static inline void free_pte_fast(pte_t *pte){	*(unsigned long *)pte = (unsigned long) pte_quicklist;	pte_quicklist = (unsigned long *) pte;	pgtable_cache_size++;} static inline void pte_free_kernel(pte_t *pte){	free_page((unsigned long)pte);} static inline void pte_free(struct page *pte){	__free_page(pte);} static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,					   unsigned long address){	pte_t *pte; 	pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT|__GFP_ZERO); 	return pte;} static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address){	struct page *pte; 	pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0); 	return pte;} #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){	pmd_t *pmd;	pmd = (pmd_t *) __get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);	return pmd;} static __inline__ void pmd_free(pmd_t *pmd){	free_page((unsigned long) 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 check_pgt_cache()		do { } while (0)#define pgd_free(pgd)		free_pgd_slow(pgd)#define pgd_alloc(mm)		get_pgd_fast() extern int do_check_pgt_cache(int, int); #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)));} #endif /* __ASM_SH64_PGALLOC_H */