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/*
* Creation Date: <2002/01/13 13:53:14 samuel>
* Time-stamp: <2002/01/27 19:56:11 samuel>
*
* <mmutypes.h>
*
* MMU definitions
*
* Most of these declarations originate from the Linux Kernel
*
* Copyright (C) 2002 Samuel Rydh (samuel@ibrium.se)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation
*
*/
#ifndef _H_MMUTYPES
#define _H_MMUTYPES
/* Hardware Page Table Entry */
typedef struct mPTE {
unsigned long v:1; /* Entry is valid */
unsigned long vsid:24; /* Virtual segment identifier */
unsigned long h:1; /* Hash algorithm indicator */
unsigned long api:6; /* Abbreviated page index */
unsigned long rpn:20; /* Real (physical) page number */
unsigned long :3; /* Unused */
unsigned long r:1; /* Referenced */
unsigned long c:1; /* Changed */
unsigned long w:1; /* Write-thru cache mode */
unsigned long i:1; /* Cache inhibited */
unsigned long m:1; /* Memory coherence */
unsigned long g:1; /* Guarded */
unsigned long :1; /* Unused */
unsigned long pp:2; /* Page protection */
} mPTE_t;
typedef struct _mBATU { /* Upper part of BAT (all except 601) */
unsigned long bepi:15; /* Effective page index (virtual address) */
unsigned long :4; /* Unused */
unsigned long bl:11; /* Block size mask */
unsigned long vs:1; /* Supervisor valid */
unsigned long vp:1; /* User valid */
} mBATU;
typedef struct _mBATL { /* Lower part of BAT (all except 601) */
unsigned long brpn:15; /* Real page index (physical address) */
unsigned long :10; /* Unused */
unsigned long w:1; /* Write-thru cache */
unsigned long i:1; /* Cache inhibit */
unsigned long m:1; /* Memory coherence */
unsigned long g:1; /* Guarded (MBZ in IBAT) */
unsigned long :1; /* Unused */
unsigned long pp:2; /* Page access protections */
} mBATL;
typedef struct _mBAT {
mBATU batu; /* Upper register */
mBATL batl; /* Lower register */
} mBAT;
typedef struct _mSEGREG {
unsigned long t:1; /* Normal or I/O type */
unsigned long ks:1; /* Supervisor 'key' (normally 0) */
unsigned long kp:1; /* User 'key' (normally 1) */
unsigned long n:1; /* No-execute */
unsigned long :4; /* Unused */
unsigned long vsid:24; /* Virtual Segment Identifier */
} mSEGREG;
#endif /* _H_MMUTYPES */
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