| /* |
| * 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 */ |
