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58ca864765
git-svn-id: svn://coreboot.org/openbios/openbios-devel@284 f158a5a8-5612-0410-a976-696ce0be7e32
77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/*
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* Creation Date: <2002/01/13 13:53:14 samuel>
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* Time-stamp: <2002/01/27 19:56:11 samuel>
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*
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* <mmutypes.h>
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*
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* MMU definitions
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*
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* Most of these declarations originate from the Linux Kernel
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*
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* Copyright (C) 2002 Samuel Rydh (samuel@ibrium.se)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation
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*
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*/
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#ifndef _H_MMUTYPES
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#define _H_MMUTYPES
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/* Hardware Page Table Entry */
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typedef struct mPTE {
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unsigned long v:1; /* Entry is valid */
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unsigned long vsid:24; /* Virtual segment identifier */
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unsigned long h:1; /* Hash algorithm indicator */
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unsigned long api:6; /* Abbreviated page index */
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unsigned long rpn:20; /* Real (physical) page number */
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unsigned long :3; /* Unused */
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unsigned long r:1; /* Referenced */
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unsigned long c:1; /* Changed */
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unsigned long w:1; /* Write-thru cache mode */
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unsigned long i:1; /* Cache inhibited */
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unsigned long m:1; /* Memory coherence */
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unsigned long g:1; /* Guarded */
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unsigned long :1; /* Unused */
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unsigned long pp:2; /* Page protection */
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} mPTE_t;
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typedef struct _mBATU { /* Upper part of BAT (all except 601) */
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unsigned long bepi:15; /* Effective page index (virtual address) */
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unsigned long :4; /* Unused */
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unsigned long bl:11; /* Block size mask */
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unsigned long vs:1; /* Supervisor valid */
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unsigned long vp:1; /* User valid */
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} mBATU;
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typedef struct _mBATL { /* Lower part of BAT (all except 601) */
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unsigned long brpn:15; /* Real page index (physical address) */
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unsigned long :10; /* Unused */
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unsigned long w:1; /* Write-thru cache */
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unsigned long i:1; /* Cache inhibit */
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unsigned long m:1; /* Memory coherence */
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unsigned long g:1; /* Guarded (MBZ in IBAT) */
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unsigned long :1; /* Unused */
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unsigned long pp:2; /* Page access protections */
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} mBATL;
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typedef struct _mBAT {
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mBATU batu; /* Upper register */
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mBATL batl; /* Lower register */
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} mBAT;
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typedef struct _mSEGREG {
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unsigned long t:1; /* Normal or I/O type */
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unsigned long ks:1; /* Supervisor 'key' (normally 0) */
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unsigned long kp:1; /* User 'key' (normally 1) */
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unsigned long n:1; /* No-execute */
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unsigned long :4; /* Unused */
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unsigned long vsid:24; /* Virtual Segment Identifier */
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} mSEGREG;
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#endif /* _H_MMUTYPES */
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