lxdream.org :: lxdream/src/sh4/mmu.h r931:430048ea8b71

tree revision 937:81b0c79d9788 lxdream-mem

filename	src/sh4/mmu.h
changeset	931:430048ea8b71
next	939:6f2302afeb89
author	nkeynes
date	Sat Dec 27 03:14:59 2008 +0000 (15 years ago)
branch	lxdream-mem
permissions	-rw-r--r--
last change	Update sh4x86 to take advantage of SR assumptions. nice 2% there :)

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     1 /**

     2  * $Id$

     3  *

     4  * MMU/TLB definitions.

     5  *

     6  * Copyright (c) 2005 Nathan Keynes.

     7  *

     8  * This program is free software; you can redistribute it and/or modify

     9  * it under the terms of the GNU General Public License as published by

    10  * the Free Software Foundation; either version 2 of the License, or

    11  * (at your option) any later version.

    12  *

    13  * This program is distributed in the hope that it will be useful,

    14  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    16  * GNU General Public License for more details.

    17  */

    20 #ifndef lxdream_sh4_mmu_H

    21 #define lxdream_sh4_mmu_H 1

    23 #include "lxdream.h"

    25 #ifdef __cplusplus

    26 extern "C" {

    27 #endif

    29 #define VMA_TO_EXT_ADDR(vma) ((vma)&0x1FFFFFFF)

    31 /************************** UTLB/ITLB Definitions ***************************/

    32 #define ITLB_ENTRY_COUNT 4

    33 #define UTLB_ENTRY_COUNT 64

    35 /* Entry address */

    36 #define TLB_VALID     0x00000100

    37 #define TLB_USERMODE  0x00000040

    38 #define TLB_WRITABLE  0x00000020

    39 #define TLB_USERWRITABLE (TLB_WRITABLE|TLB_USERMODE)

    40 #define TLB_SIZE_MASK 0x00000090

    41 #define TLB_SIZE_1K   0x00000000

    42 #define TLB_SIZE_4K   0x00000010

    43 #define TLB_SIZE_64K  0x00000080

    44 #define TLB_SIZE_1M   0x00000090

    45 #define TLB_CACHEABLE 0x00000008

    46 #define TLB_DIRTY     0x00000004

    47 #define TLB_SHARE     0x00000002

    48 #define TLB_WRITETHRU 0x00000001

    50 #define MASK_1K  0xFFFFFC00

    51 #define MASK_4K  0xFFFFF000

    52 #define MASK_64K 0xFFFF0000

    53 #define MASK_1M  0xFFF00000

    55 struct itlb_entry {

    56     sh4addr_t vpn; // Virtual Page Number

    57     uint32_t asid; // Process ID

    58     uint32_t mask;

    59     sh4addr_t ppn; // Physical Page Number

    60     uint32_t flags;

    61 };

    63 struct utlb_entry {

    64     sh4addr_t vpn; // Virtual Page Number

    65     uint32_t mask; // Page size mask

    66     uint32_t asid; // Process ID

    67     sh4addr_t ppn; // Physical Page Number

    68     uint32_t flags;

    69     uint32_t pcmcia; // extra pcmcia data - not used

    70 };

    72 struct utlb_sort_entry {

    73     sh4addr_t key; // Masked VPN + ASID

    74     uint32_t mask; // Mask + 0x00FF

    75     int entryNo;

    76 };

    78 #ifdef __cplusplus

    79 }

    80 #endif

    81 #endif /* !lxdream_sh4_mmu_H */