1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/sh4/mmu.h	Sat Dec 27 03:14:59 2008 +0000
     1.3 @@ -0,0 +1,81 @@
     1.4 +/**
     1.5 + * $Id$
     1.6 + *
     1.7 + * MMU/TLB definitions.
     1.8 + *
     1.9 + * Copyright (c) 2005 Nathan Keynes.
    1.10 + *
    1.11 + * This program is free software; you can redistribute it and/or modify
    1.12 + * it under the terms of the GNU General Public License as published by
    1.13 + * the Free Software Foundation; either version 2 of the License, or
    1.14 + * (at your option) any later version.
    1.15 + *
    1.16 + * This program is distributed in the hope that it will be useful,
    1.17 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.18 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.19 + * GNU General Public License for more details.
    1.20 + */
    1.21 +
    1.22 +
    1.23 +#ifndef lxdream_sh4_mmu_H
    1.24 +#define lxdream_sh4_mmu_H 1
    1.25 +
    1.26 +#include "lxdream.h"
    1.27 +
    1.28 +#ifdef __cplusplus
    1.29 +extern "C" {
    1.30 +#endif
    1.31 +
    1.32 +#define VMA_TO_EXT_ADDR(vma) ((vma)&0x1FFFFFFF)
    1.33 +
    1.34 +/************************** UTLB/ITLB Definitions ***************************/
    1.35 +#define ITLB_ENTRY_COUNT 4
    1.36 +#define UTLB_ENTRY_COUNT 64
    1.37 +
    1.38 +/* Entry address */
    1.39 +#define TLB_VALID     0x00000100
    1.40 +#define TLB_USERMODE  0x00000040
    1.41 +#define TLB_WRITABLE  0x00000020
    1.42 +#define TLB_USERWRITABLE (TLB_WRITABLE|TLB_USERMODE)
    1.43 +#define TLB_SIZE_MASK 0x00000090
    1.44 +#define TLB_SIZE_1K   0x00000000
    1.45 +#define TLB_SIZE_4K   0x00000010
    1.46 +#define TLB_SIZE_64K  0x00000080
    1.47 +#define TLB_SIZE_1M   0x00000090
    1.48 +#define TLB_CACHEABLE 0x00000008
    1.49 +#define TLB_DIRTY     0x00000004
    1.50 +#define TLB_SHARE     0x00000002
    1.51 +#define TLB_WRITETHRU 0x00000001
    1.52 +
    1.53 +#define MASK_1K  0xFFFFFC00
    1.54 +#define MASK_4K  0xFFFFF000
    1.55 +#define MASK_64K 0xFFFF0000
    1.56 +#define MASK_1M  0xFFF00000
    1.57 +
    1.58 +struct itlb_entry {
    1.59 +    sh4addr_t vpn; // Virtual Page Number
    1.60 +    uint32_t asid; // Process ID
    1.61 +    uint32_t mask;
    1.62 +    sh4addr_t ppn; // Physical Page Number
    1.63 +    uint32_t flags;
    1.64 +};
    1.65 +
    1.66 +struct utlb_entry {
    1.67 +    sh4addr_t vpn; // Virtual Page Number
    1.68 +    uint32_t mask; // Page size mask
    1.69 +    uint32_t asid; // Process ID
    1.70 +    sh4addr_t ppn; // Physical Page Number
    1.71 +    uint32_t flags;
    1.72 +    uint32_t pcmcia; // extra pcmcia data - not used
    1.73 +};
    1.74 +
    1.75 +struct utlb_sort_entry {
    1.76 +    sh4addr_t key; // Masked VPN + ASID
    1.77 +    uint32_t mask; // Mask + 0x00FF
    1.78 +    int entryNo;
    1.79 +};
    1.80 +    
    1.81 +#ifdef __cplusplus
    1.82 +}
    1.83 +#endif
    1.84 +#endif /* !lxdream_sh4_mmu_H */