nkeynes@586 | 1 | /**
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nkeynes@586 | 2 | * $Id: sh4.h 577 2008-01-01 05:08:38Z nkeynes $
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nkeynes@586 | 3 | *
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nkeynes@586 | 4 | * This file defines the public functions and definitions exported by the SH4
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nkeynes@586 | 5 | * modules.
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nkeynes@586 | 6 | *
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nkeynes@586 | 7 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@586 | 8 | *
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nkeynes@586 | 9 | * This program is free software; you can redistribute it and/or modify
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nkeynes@586 | 10 | * it under the terms of the GNU General Public License as published by
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nkeynes@586 | 11 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@586 | 12 | * (at your option) any later version.
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nkeynes@586 | 13 | *
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nkeynes@586 | 14 | * This program is distributed in the hope that it will be useful,
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nkeynes@586 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@586 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@586 | 17 | * GNU General Public License for more details.
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nkeynes@586 | 18 | */
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nkeynes@586 | 19 |
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nkeynes@586 | 20 | #ifndef lxdream_sh4_H
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nkeynes@586 | 21 | #define lxdream_sh4_H 1
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nkeynes@586 | 22 |
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nkeynes@586 | 23 | #include "lxdream.h"
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nkeynes@586 | 24 | #include "mem.h"
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nkeynes@586 | 25 |
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nkeynes@586 | 26 | #ifdef __cplusplus
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nkeynes@586 | 27 | extern "C" {
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nkeynes@586 | 28 | #endif
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nkeynes@586 | 29 |
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nkeynes@586 | 30 |
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nkeynes@586 | 31 | /**
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nkeynes@586 | 32 | * SH4 is running normally
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nkeynes@586 | 33 | */
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nkeynes@586 | 34 | #define SH4_STATE_RUNNING 1
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nkeynes@586 | 35 | /**
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nkeynes@586 | 36 | * SH4 is not executing instructions but all peripheral modules are still
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nkeynes@586 | 37 | * running
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nkeynes@586 | 38 | */
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nkeynes@586 | 39 | #define SH4_STATE_SLEEP 2
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nkeynes@586 | 40 | /**
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nkeynes@586 | 41 | * SH4 is not executing instructions, DMAC is halted, but all other peripheral
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nkeynes@586 | 42 | * modules are still running
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nkeynes@586 | 43 | */
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nkeynes@586 | 44 | #define SH4_STATE_DEEP_SLEEP 3
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nkeynes@586 | 45 | /**
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nkeynes@586 | 46 | * SH4 is not executing instructions and all peripheral modules are also
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nkeynes@586 | 47 | * stopped. As close as you can get to powered-off without actually being
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nkeynes@586 | 48 | * off.
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nkeynes@586 | 49 | */
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nkeynes@586 | 50 | #define SH4_STATE_STANDBY 4
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nkeynes@586 | 51 |
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nkeynes@586 | 52 | /**
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nkeynes@586 | 53 | * sh4r.event_types flag indicating a pending IRQ
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nkeynes@586 | 54 | */
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nkeynes@586 | 55 | #define PENDING_IRQ 1
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nkeynes@586 | 56 |
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nkeynes@586 | 57 | /**
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nkeynes@586 | 58 | * sh4r.event_types flag indicating a pending event (from the event queue)
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nkeynes@586 | 59 | */
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nkeynes@586 | 60 | #define PENDING_EVENT 2
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nkeynes@586 | 61 |
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nkeynes@586 | 62 | /**
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nkeynes@586 | 63 | * SH4 register structure
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nkeynes@586 | 64 | */
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nkeynes@586 | 65 | struct sh4_registers {
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nkeynes@586 | 66 | uint32_t r[16];
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nkeynes@903 | 67 | uint32_t sr, pr, pc;
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nkeynes@669 | 68 | union {
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nkeynes@736 | 69 | int32_t i;
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nkeynes@736 | 70 | float f;
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nkeynes@669 | 71 | } fpul;
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nkeynes@903 | 72 | uint32_t t, m, q, s; /* really boolean - 0 or 1 */
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nkeynes@904 | 73 | float fr[2][16]; /* Must be aligned on 16-byte boundary */
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nkeynes@903 | 74 | uint32_t fpscr;
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nkeynes@883 | 75 | uint32_t pad; /* Pad up to 64-bit boundaries */
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nkeynes@586 | 76 | uint64_t mac;
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nkeynes@586 | 77 | uint32_t gbr, ssr, spc, sgr, dbr, vbr;
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nkeynes@586 | 78 |
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nkeynes@586 | 79 | uint32_t r_bank[8]; /* hidden banked registers */
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nkeynes@586 | 80 | int32_t store_queue[16]; /* technically 2 banks of 32 bytes */
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nkeynes@736 | 81 |
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nkeynes@586 | 82 | uint32_t new_pc; /* Not a real register, but used to handle delay slots */
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nkeynes@586 | 83 | uint32_t event_pending; /* slice cycle time of the next pending event, or FFFFFFFF
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nkeynes@586 | 84 | when no events are pending */
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nkeynes@586 | 85 | uint32_t event_types; /* bit 0 = IRQ pending, bit 1 = general event pending */
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nkeynes@586 | 86 | int in_delay_slot; /* flag to indicate the current instruction is in
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nkeynes@736 | 87 | * a delay slot (certain rules apply) */
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nkeynes@586 | 88 | uint32_t slice_cycle; /* Current nanosecond within the timeslice */
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nkeynes@958 | 89 | uint32_t bus_cycle; /* Nanosecond within the timeslice that the bus will be free */
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nkeynes@586 | 90 | int sh4_state; /* Current power-on state (one of the SH4_STATE_* values ) */
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nkeynes@953 | 91 |
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nkeynes@953 | 92 | /* Not saved */
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nkeynes@953 | 93 | int xlat_sh4_mode; /* Collection of execution mode flags (derived) from fpscr, sr, etc */
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nkeynes@586 | 94 | };
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nkeynes@586 | 95 |
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nkeynes@586 | 96 | extern struct sh4_registers sh4r;
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nkeynes@586 | 97 |
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nkeynes@586 | 98 | /**
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nkeynes@586 | 99 | * Switch between translation and emulation execution modes. Note that this
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nkeynes@586 | 100 | * should only be used while the system is stopped. If the system was built
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nkeynes@586 | 101 | * without translation support, this method has no effect.
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nkeynes@586 | 102 | *
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nkeynes@586 | 103 | * @param use TRUE for translation mode, FALSE for emulation mode.
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nkeynes@586 | 104 | */
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nkeynes@740 | 105 | void sh4_translate_set_enabled( gboolean use );
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nkeynes@586 | 106 |
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nkeynes@586 | 107 | /**
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nkeynes@586 | 108 | * Test if system is currently using the translation engine.
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nkeynes@586 | 109 | */
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nkeynes@740 | 110 | gboolean sh4_translate_is_enabled();
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nkeynes@586 | 111 |
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nkeynes@586 | 112 | /**
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nkeynes@586 | 113 | * Explicitly set the SH4 PC to the supplied value - this will be the next
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nkeynes@586 | 114 | * instruction executed. This should only be called while the system is stopped.
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nkeynes@586 | 115 | */
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nkeynes@586 | 116 | void sh4_set_pc( int pc );
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nkeynes@586 | 117 |
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nkeynes@586 | 118 | /**
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nkeynes@586 | 119 | * Execute (using the emulator) a single instruction (in other words, perform a
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nkeynes@586 | 120 | * single-step operation).
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nkeynes@586 | 121 | */
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nkeynes@586 | 122 | gboolean sh4_execute_instruction( void );
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nkeynes@586 | 123 |
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nkeynes@586 | 124 | /* SH4 breakpoints */
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nkeynes@586 | 125 | void sh4_set_breakpoint( uint32_t pc, breakpoint_type_t type );
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nkeynes@586 | 126 | gboolean sh4_clear_breakpoint( uint32_t pc, breakpoint_type_t type );
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nkeynes@586 | 127 | int sh4_get_breakpoint( uint32_t pc );
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nkeynes@586 | 128 |
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nkeynes@586 | 129 | #ifdef __cplusplus
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nkeynes@586 | 130 | }
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nkeynes@586 | 131 | #endif
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nkeynes@586 | 132 | #endif /* !lxdream_sh4_H */
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