remap.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. 
 *
 */
/*****************************************************************
 * Hive-specific file used for remapping the address space of 
 * nodes.
 * 
 * $Author: bosch $
 * $Date: 1998/02/10 00:32:56 $
 *****************************************************************/
#ifndef REMAP_H
#define REMAP_H

#ifndef _LANGUAGE_ASSEMBLY
#include "syslimits.h"
/*****************************************************************
 * Remap storage +  some useful macros for interpreting the remap.
 * **************************************************************/

typedef struct RemapVector {
   PA            RemapMask[SIM_MAXCPUS];   /* remap mask for each node */
   unsigned char RemapEnable[SIM_MAXCPUS]; /* remap enabled? */
   PA            NodeAddr[SIM_MAXCPUS];    /* beg. PA of node memory range */
   int           NodeAddrInitialized;      /* NodeAddr inited? */
   /* whichever memory simulator boots this system fills out the
    * nodeaddr array and sets Initialized.  Subsequent memory system
    * switches or checkpoint restarts are not allowed to change
    * the nodeaddr array because its effects are OS-visible.
    */
} RemapVector;

extern RemapVector *remapVec;
    
/* NB FIRST_NONREMAPPED_PADDR assumes the RemapMask is of the form (1*0*) */

#define FIRST_NONREMAPPED_PADDR(cpuid) \
  (remapVec->RemapEnable[cpuid] ? (1+~remapVec->RemapMask[cpuid]) : 0)
#define IS_REMAPPED_PADDR(paddr, cpuid) \
  (remapVec->RemapEnable[cpuid] ? !((paddr) &remapVec->RemapMask[cpuid]) : 0)
#define REMAP_PADDR(paddr, cpuid) \
   ((paddr)+(IS_REMAPPED_PADDR(paddr, cpuid) ? remapVec->NodeAddr[cpuid] : 0))

#endif /* !LANGUAGE_ASSEMBLY */
#endif /* REMAP_H */