FreeBSD/Linux Kernel Cross Reference
sys/mips/include/tlb.h

     /*-
      * Copyright (c) 2004-2010 Juli Mallett <jmallett@FreeBSD.org>
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_TLB_H_
    #define _MACHINE_TLB_H_
    
    /*
     * The first TLB entry that write random hits.
     * TLB entry 0 maps the kernel stack of the currently running thread
     * TLB entry 1 maps the pcpu area of processor (only for SMP builds)
     */
    #define KSTACK_TLB_ENTRY        0
    #ifdef SMP
    #define PCPU_TLB_ENTRY          1
    #define VMWIRED_ENTRIES         2
    #else
    #define VMWIRED_ENTRIES         1
    #endif  /* SMP */
    
    /*
     * The number of process id entries.
     */
    #define VMNUM_PIDS              256
    
    extern int num_tlbentries;
    
    void tlb_insert_wired(unsigned, vm_offset_t, pt_entry_t, pt_entry_t);
    void tlb_invalidate_address(struct pmap *, vm_offset_t);
    void tlb_invalidate_all(void);
    void tlb_invalidate_all_user(struct pmap *);
    void tlb_invalidate_range(struct pmap *, vm_offset_t, vm_offset_t);
    void tlb_save(void);
    void tlb_update(struct pmap *, vm_offset_t, pt_entry_t);
    
    #endif /* !_MACHINE_TLB_H_ */

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