#ifndef _ASM_IA64_PGALLOC_H #define _ASM_IA64_PGALLOC_H /* * This file contains the functions and defines necessary to allocate * page tables. * * This hopefully works with any (fixed) ia-64 page-size, as defined * in <asm/page.h> (currently 8192). * * Copyright (C) 1998-2001 Hewlett-Packard Co * David Mosberger-Tang <davidm@hpl.hp.com> * Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com> */ #include <linux/compiler.h> #include <linux/mm.h> #include <linux/page-flags.h> #include <linux/threads.h> #include <asm/mmu_context.h> DECLARE_PER_CPU(unsigned long *, __pgtable_quicklist); #define pgtable_quicklist __ia64_per_cpu_var(__pgtable_quicklist) DECLARE_PER_CPU(long, __pgtable_quicklist_size); #define pgtable_quicklist_size __ia64_per_cpu_var(__pgtable_quicklist_size) static inline long pgtable_quicklist_total_size(void) { long ql_size = 0; int cpuid; for_each_online_cpu(cpuid) { ql_size += per_cpu(__pgtable_quicklist_size, cpuid); } return ql_size; } static inline void *pgtable_quicklist_alloc(void) { unsigned long *ret = NULL; preempt_disable(); ret = pgtable_quicklist; if (likely(ret != NULL)) { pgtable_quicklist = (unsigned long *)(*ret); ret[0] = 0; --pgtable_quicklist_size; preempt_enable(); } else { preempt_enable(); ret = (unsigned long *)__get_free_page(GFP_KERNEL | __GFP_ZERO); } return ret; } static inline void pgtable_quicklist_free(void *pgtable_entry) { #ifdef CONFIG_NUMA unsigned long nid = page_to_nid(virt_to_page(pgtable_entry)); if (unlikely(nid != numa_node_id())) { free_page((unsigned long)pgtable_entry); return; } #endif preempt_disable(); *(unsigned long *)pgtable_entry = (unsigned long)pgtable_quicklist; pgtable_quicklist = (unsigned long *)pgtable_entry; ++pgtable_quicklist_size; preempt_enable(); } static inline pgd_t *pgd_alloc(struct mm_struct *mm) { return pgtable_quicklist_alloc(); } static inline void pgd_free(pgd_t * pgd) { pgtable_quicklist_free(pgd); } #ifdef CONFIG_PGTABLE_4 static inline void pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud) { pgd_val(*pgd_entry) = __pa(pud); } static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) { return pgtable_quicklist_alloc(); } static inline void pud_free(pud_t * pud) { pgtable_quicklist_free(pud); } #define __pud_free_tlb(tlb, pud) pud_free(pud) #endif /* CONFIG_PGTABLE_4 */ static inline void pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd) { pud_val(*pud_entry) = __pa(pmd); } static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { return pgtable_quicklist_alloc(); } static inline void pmd_free(pmd_t * pmd) { pgtable_quicklist_free(pmd); } #define __pmd_free_tlb(tlb, pmd) pmd_free(pmd) static inline void pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, struct page *pte) { pmd_val(*pmd_entry) = page_to_phys(pte); } static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte) { pmd_val(*pmd_entry) = __pa(pte); } static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr) { return virt_to_page(pgtable_quicklist_alloc()); } static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) { return pgtable_quicklist_alloc(); } static inline void pte_free(struct page *pte) { pgtable_quicklist_free(page_address(pte)); } static inline void pte_free_kernel(pte_t * pte) { pgtable_quicklist_free(pte); } #define __pte_free_tlb(tlb, pte) pte_free(pte) extern void check_pgt_cache(void); #endif /* _ASM_IA64_PGALLOC_H */