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lxdream.org :: lxdream/src/sh4/mmu.h :: diff
lxdream 0.9.1
released Jun 29
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filename src/sh4/mmu.h
changeset 931:430048ea8b71
next939:6f2302afeb89
author nkeynes
date Tue Dec 23 05:48:05 2008 +0000 (12 years ago)
branchlxdream-mem
permissions -rw-r--r--
last change More refactoring and general cleanup. Most things should be working again now.
Split off cache and start real implementation, breaking save states in the process
file annotate diff log raw
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/sh4/mmu.h Tue Dec 23 05:48:05 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 */
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