nkeynes@564 | 1 | /**
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nkeynes@564 | 2 | * $Id: sh4.h 577 2008-01-01 05:08:38Z nkeynes $
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nkeynes@564 | 3 | *
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nkeynes@564 | 4 | * This file defines the public functions and definitions exported by the SH4
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nkeynes@564 | 5 | * modules.
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nkeynes@564 | 6 | *
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nkeynes@564 | 7 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@564 | 8 | *
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nkeynes@564 | 9 | * This program is free software; you can redistribute it and/or modify
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nkeynes@564 | 10 | * it under the terms of the GNU General Public License as published by
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nkeynes@564 | 11 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@564 | 12 | * (at your option) any later version.
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nkeynes@564 | 13 | *
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nkeynes@564 | 14 | * This program is distributed in the hope that it will be useful,
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nkeynes@564 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@564 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@564 | 17 | * GNU General Public License for more details.
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nkeynes@564 | 18 | */
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nkeynes@564 | 19 |
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nkeynes@564 | 20 | #ifndef lxdream_sh4_H
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nkeynes@564 | 21 | #define lxdream_sh4_H 1
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nkeynes@564 | 22 |
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nkeynes@564 | 23 | #include "lxdream.h"
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nkeynes@564 | 24 |
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nkeynes@564 | 25 | #ifdef __cplusplus
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nkeynes@564 | 26 | extern "C" {
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nkeynes@564 | 27 | #endif
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nkeynes@564 | 28 |
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nkeynes@564 | 29 |
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nkeynes@564 | 30 | /**
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nkeynes@564 | 31 | * SH4 is running normally
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nkeynes@564 | 32 | */
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nkeynes@564 | 33 | #define SH4_STATE_RUNNING 1
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nkeynes@564 | 34 | /**
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nkeynes@564 | 35 | * SH4 is not executing instructions but all peripheral modules are still
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nkeynes@564 | 36 | * running
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nkeynes@564 | 37 | */
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nkeynes@564 | 38 | #define SH4_STATE_SLEEP 2
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nkeynes@564 | 39 | /**
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nkeynes@564 | 40 | * SH4 is not executing instructions, DMAC is halted, but all other peripheral
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nkeynes@564 | 41 | * modules are still running
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nkeynes@564 | 42 | */
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nkeynes@564 | 43 | #define SH4_STATE_DEEP_SLEEP 3
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nkeynes@564 | 44 | /**
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nkeynes@564 | 45 | * SH4 is not executing instructions and all peripheral modules are also
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nkeynes@564 | 46 | * stopped. As close as you can get to powered-off without actually being
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nkeynes@564 | 47 | * off.
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nkeynes@564 | 48 | */
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nkeynes@564 | 49 | #define SH4_STATE_STANDBY 4
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nkeynes@564 | 50 |
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nkeynes@564 | 51 | /**
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nkeynes@564 | 52 | * sh4r.event_types flag indicating a pending IRQ
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nkeynes@564 | 53 | */
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nkeynes@564 | 54 | #define PENDING_IRQ 1
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nkeynes@564 | 55 |
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nkeynes@564 | 56 | /**
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nkeynes@564 | 57 | * sh4r.event_types flag indicating a pending event (from the event queue)
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nkeynes@564 | 58 | */
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nkeynes@564 | 59 | #define PENDING_EVENT 2
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nkeynes@564 | 60 |
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nkeynes@564 | 61 | /**
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nkeynes@564 | 62 | * SH4 register structure
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nkeynes@564 | 63 | */
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nkeynes@564 | 64 | struct sh4_registers {
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nkeynes@564 | 65 | uint32_t r[16];
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nkeynes@564 | 66 | uint32_t sr, pr, pc, fpscr;
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nkeynes@564 | 67 | uint32_t t, m, q, s; /* really boolean - 0 or 1 */
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nkeynes@564 | 68 | int32_t fpul;
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nkeynes@564 | 69 | float *fr_bank;
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nkeynes@564 | 70 | float fr[2][16];
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nkeynes@564 | 71 | uint64_t mac;
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nkeynes@564 | 72 | uint32_t gbr, ssr, spc, sgr, dbr, vbr;
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nkeynes@564 | 73 |
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nkeynes@564 | 74 | uint32_t r_bank[8]; /* hidden banked registers */
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nkeynes@564 | 75 | int32_t store_queue[16]; /* technically 2 banks of 32 bytes */
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nkeynes@564 | 76 |
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nkeynes@564 | 77 | uint32_t new_pc; /* Not a real register, but used to handle delay slots */
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nkeynes@564 | 78 | uint32_t event_pending; /* slice cycle time of the next pending event, or FFFFFFFF
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nkeynes@564 | 79 | when no events are pending */
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nkeynes@564 | 80 | uint32_t event_types; /* bit 0 = IRQ pending, bit 1 = general event pending */
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nkeynes@564 | 81 | int in_delay_slot; /* flag to indicate the current instruction is in
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nkeynes@564 | 82 | * a delay slot (certain rules apply) */
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nkeynes@564 | 83 | uint32_t slice_cycle; /* Current nanosecond within the timeslice */
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nkeynes@564 | 84 | int sh4_state; /* Current power-on state (one of the SH4_STATE_* values ) */
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nkeynes@564 | 85 | };
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nkeynes@564 | 86 |
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nkeynes@564 | 87 | extern struct sh4_registers sh4r;
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nkeynes@564 | 88 |
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nkeynes@564 | 89 | /**
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nkeynes@564 | 90 | * Switch between translation and emulation execution modes. Note that this
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nkeynes@564 | 91 | * should only be used while the system is stopped. If the system was built
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nkeynes@564 | 92 | * without translation support, this method has no effect.
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nkeynes@564 | 93 | *
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nkeynes@564 | 94 | * @param use TRUE for translation mode, FALSE for emulation mode.
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nkeynes@564 | 95 | */
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nkeynes@564 | 96 | void sh4_set_use_xlat( gboolean use );
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nkeynes@564 | 97 |
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nkeynes@564 | 98 | /**
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nkeynes@564 | 99 | * Explicitly set the SH4 PC to the supplied value - this will be the next
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nkeynes@564 | 100 | * instruction executed. This should only be called while the system is stopped.
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nkeynes@564 | 101 | */
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nkeynes@564 | 102 | void sh4_set_pc( int pc );
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nkeynes@564 | 103 |
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nkeynes@564 | 104 | /**
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nkeynes@564 | 105 | * Execute (using the emulator) a single instruction (in other words, perform a
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nkeynes@564 | 106 | * single-step operation).
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nkeynes@564 | 107 | */
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nkeynes@564 | 108 | gboolean sh4_execute_instruction( void );
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nkeynes@564 | 109 |
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nkeynes@564 | 110 | /* SH4 breakpoints */
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nkeynes@564 | 111 |
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nkeynes@564 | 112 | #define BREAK_ONESHOT 1
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nkeynes@564 | 113 | #define BREAK_PERM 2
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nkeynes@564 | 114 |
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nkeynes@564 | 115 | void sh4_set_breakpoint( uint32_t pc, int type );
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nkeynes@564 | 116 | gboolean sh4_clear_breakpoint( uint32_t pc, int type );
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nkeynes@564 | 117 | int sh4_get_breakpoint( uint32_t pc );
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nkeynes@564 | 118 |
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nkeynes@564 | 119 |
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nkeynes@564 | 120 |
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nkeynes@564 | 121 |
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nkeynes@564 | 122 | #ifdef __cplusplus
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nkeynes@564 | 123 | }
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nkeynes@564 | 124 | #endif
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nkeynes@564 | 125 | #endif /* !lxdream_sh4_H */
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