FreeBSD/Linux Kernel Cross Reference
sys/sparc64/include/tsb.h

     /*-
      * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
      * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Berkeley Software Design Inc's name may not be used to endorse or
     *    promote products derived from this software without specific prior
     *    written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      from: BSDI: pmap.v9.h,v 1.10.2.6 1999/08/23 22:18:44 cp Exp
     * $FreeBSD: releng/6.0/sys/sparc64/include/tsb.h 113238 2003-04-08 06:35:09Z jake $
     */
    
    #ifndef _MACHINE_TSB_H_
    #define _MACHINE_TSB_H_
    
    #define TSB_PAGES_SHIFT                 (4)
    #define TSB_PAGES                       (1 << TSB_PAGES_SHIFT)
    #define TSB_BSHIFT                      (TSB_PAGES_SHIFT + PAGE_SHIFT)
    #define TSB_BSIZE                       (1UL << TSB_BSHIFT)
    #define TSB_SIZE                        (TSB_BSIZE / sizeof(struct tte))
    #define TSB_BUCKET_SHIFT                (2)
    #define TSB_BUCKET_SIZE                 (1 << TSB_BUCKET_SHIFT)
    #define TSB_BUCKET_ADDRESS_BITS \
            (TSB_BSHIFT - TSB_BUCKET_SHIFT - TTE_SHIFT)
    #define TSB_BUCKET_MASK                 ((1 << TSB_BUCKET_ADDRESS_BITS) - 1)
    
    extern struct tte *tsb_kernel;
    extern vm_size_t tsb_kernel_mask;
    extern vm_size_t tsb_kernel_size;
    extern vm_paddr_t tsb_kernel_phys;
    
    static __inline struct tte *
    tsb_vpntobucket(pmap_t pm, vm_offset_t vpn)
    {
            return (&pm->pm_tsb[(vpn & TSB_BUCKET_MASK) << TSB_BUCKET_SHIFT]);
    }
    
    static __inline struct tte *
    tsb_vtobucket(pmap_t pm, u_long sz, vm_offset_t va)
    {
            return (tsb_vpntobucket(pm, va >> TTE_PAGE_SHIFT(sz)));
    }
    
    static __inline struct tte *
    tsb_kvpntotte(vm_offset_t vpn)
    {
            return (&tsb_kernel[vpn & tsb_kernel_mask]);
    }
    
    static __inline struct tte *
    tsb_kvtotte(vm_offset_t va)
    {
            return (tsb_kvpntotte(va >> PAGE_SHIFT));
    }
    
    typedef int (tsb_callback_t)(struct pmap *, struct pmap *, struct tte *,
                                 vm_offset_t);
    
    struct  tte *tsb_tte_lookup(pmap_t pm, vm_offset_t va);
    void    tsb_tte_remove(struct tte *stp);
    struct  tte *tsb_tte_enter(pmap_t pm, vm_page_t m, vm_offset_t va, u_long sz,
                               u_long data);
    void    tsb_tte_local_remove(struct tte *tp);
    void    tsb_foreach(pmap_t pm1, pmap_t pm2, vm_offset_t start, vm_offset_t end,
                        tsb_callback_t *callback);
    
    #endif /* !_MACHINE_TSB_H_ */

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