directory.h

一个用在mips体系结构中的操作系统

/*
 * Copyright (C) 1996-1998 by the Board of Trustees
 *    of Leland Stanford Junior University.
 * 
 * This file is part of the SimOS distribution. 
 * See LICENSE file for terms of the license. 
 *
 */

#ifndef DIRECTORY_H
#define DIRECTORY_H

#ifndef _LANGUAGE_ASSEMBLY

#define DIRECTORY_SIZE(_m) ((ADDR2SLINE(MEM_SIZE(_m))) * sizeof( Dir_Entry ))

extern Dir_Entry *directory[MAX_MACHINES];  

/* used for range checking */
extern Dir_Entry *max_directory[MAX_MACHINES];

/* Initialize the directory.  It decides what to do */
extern void Directory_Init(void);
/* MPinUP uses this interface -- no need to lock */
void Directory_NoLock_Modify( int cpuNum, PA pAddr, VA vAddr, int state );
/* The idea is that you lock a directory entry, do whatever processing */
/* you need with the garuntee that any other processor will spin at */
/* the directory, then you free the line */
extern Dir_Entry Directory_Lock( int cpuNum, PA pAddr, VA vAddr, int state);
extern void Directory_Free( int cpuNum, PA pAddr, Dir_Entry dir_ent );
/* This eliminates the given processor from the directory */
/* Used for replacement hints */
void Directory_Eliminate( int cpuNum, PLN pline, unsigned cpu_bit );
/* In directory_asm.s for MPinMP */
C_LINK int Dir_Lock_Line( Dir_Entry* );
#endif
#endif