filename | src/sh4/sh4.h |
changeset | 740:dd11269ee48b |
prev | 736:a02d1475ccfd |
next | 851:41e8ae2c114b |
author | nkeynes |
date | Wed Jul 16 10:40:10 2008 +0000 (15 years ago) |
permissions | -rw-r--r-- |
last change | Rationalize the two SH4 run slice impls into sh4.c, and tidy up the vm exits. Fixes broken soft-reset with emulator core Fixes broken build without translator |
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nkeynes@586 | 1 | /** |
nkeynes@586 | 2 | * $Id: sh4.h 577 2008-01-01 05:08:38Z nkeynes $ |
nkeynes@586 | 3 | * |
nkeynes@586 | 4 | * This file defines the public functions and definitions exported by the SH4 |
nkeynes@586 | 5 | * modules. |
nkeynes@586 | 6 | * |
nkeynes@586 | 7 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@586 | 8 | * |
nkeynes@586 | 9 | * This program is free software; you can redistribute it and/or modify |
nkeynes@586 | 10 | * it under the terms of the GNU General Public License as published by |
nkeynes@586 | 11 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@586 | 12 | * (at your option) any later version. |
nkeynes@586 | 13 | * |
nkeynes@586 | 14 | * This program is distributed in the hope that it will be useful, |
nkeynes@586 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@586 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@586 | 17 | * GNU General Public License for more details. |
nkeynes@586 | 18 | */ |
nkeynes@586 | 19 | |
nkeynes@586 | 20 | #ifndef lxdream_sh4_H |
nkeynes@586 | 21 | #define lxdream_sh4_H 1 |
nkeynes@586 | 22 | |
nkeynes@586 | 23 | #include "lxdream.h" |
nkeynes@586 | 24 | #include "mem.h" |
nkeynes@586 | 25 | |
nkeynes@586 | 26 | #ifdef __cplusplus |
nkeynes@586 | 27 | extern "C" { |
nkeynes@586 | 28 | #endif |
nkeynes@586 | 29 | |
nkeynes@586 | 30 | |
nkeynes@586 | 31 | /** |
nkeynes@586 | 32 | * SH4 is running normally |
nkeynes@586 | 33 | */ |
nkeynes@586 | 34 | #define SH4_STATE_RUNNING 1 |
nkeynes@586 | 35 | /** |
nkeynes@586 | 36 | * SH4 is not executing instructions but all peripheral modules are still |
nkeynes@586 | 37 | * running |
nkeynes@586 | 38 | */ |
nkeynes@586 | 39 | #define SH4_STATE_SLEEP 2 |
nkeynes@586 | 40 | /** |
nkeynes@586 | 41 | * SH4 is not executing instructions, DMAC is halted, but all other peripheral |
nkeynes@586 | 42 | * modules are still running |
nkeynes@586 | 43 | */ |
nkeynes@586 | 44 | #define SH4_STATE_DEEP_SLEEP 3 |
nkeynes@586 | 45 | /** |
nkeynes@586 | 46 | * SH4 is not executing instructions and all peripheral modules are also |
nkeynes@586 | 47 | * stopped. As close as you can get to powered-off without actually being |
nkeynes@586 | 48 | * off. |
nkeynes@586 | 49 | */ |
nkeynes@586 | 50 | #define SH4_STATE_STANDBY 4 |
nkeynes@586 | 51 | |
nkeynes@586 | 52 | /** |
nkeynes@586 | 53 | * sh4r.event_types flag indicating a pending IRQ |
nkeynes@586 | 54 | */ |
nkeynes@586 | 55 | #define PENDING_IRQ 1 |
nkeynes@586 | 56 | |
nkeynes@586 | 57 | /** |
nkeynes@586 | 58 | * sh4r.event_types flag indicating a pending event (from the event queue) |
nkeynes@586 | 59 | */ |
nkeynes@586 | 60 | #define PENDING_EVENT 2 |
nkeynes@586 | 61 | |
nkeynes@586 | 62 | /** |
nkeynes@586 | 63 | * SH4 register structure |
nkeynes@586 | 64 | */ |
nkeynes@586 | 65 | struct sh4_registers { |
nkeynes@586 | 66 | uint32_t r[16]; |
nkeynes@586 | 67 | uint32_t sr, pr, pc, fpscr; |
nkeynes@586 | 68 | uint32_t t, m, q, s; /* really boolean - 0 or 1 */ |
nkeynes@669 | 69 | union { |
nkeynes@736 | 70 | int32_t i; |
nkeynes@736 | 71 | float f; |
nkeynes@669 | 72 | } fpul; |
nkeynes@674 | 73 | uint32_t pad; // FIXME: remove in next DST version |
nkeynes@586 | 74 | float fr[2][16]; |
nkeynes@586 | 75 | uint64_t mac; |
nkeynes@586 | 76 | uint32_t gbr, ssr, spc, sgr, dbr, vbr; |
nkeynes@586 | 77 | |
nkeynes@586 | 78 | uint32_t r_bank[8]; /* hidden banked registers */ |
nkeynes@586 | 79 | int32_t store_queue[16]; /* technically 2 banks of 32 bytes */ |
nkeynes@736 | 80 | |
nkeynes@586 | 81 | uint32_t new_pc; /* Not a real register, but used to handle delay slots */ |
nkeynes@586 | 82 | uint32_t event_pending; /* slice cycle time of the next pending event, or FFFFFFFF |
nkeynes@586 | 83 | when no events are pending */ |
nkeynes@586 | 84 | uint32_t event_types; /* bit 0 = IRQ pending, bit 1 = general event pending */ |
nkeynes@586 | 85 | int in_delay_slot; /* flag to indicate the current instruction is in |
nkeynes@736 | 86 | * a delay slot (certain rules apply) */ |
nkeynes@586 | 87 | uint32_t slice_cycle; /* Current nanosecond within the timeslice */ |
nkeynes@586 | 88 | int sh4_state; /* Current power-on state (one of the SH4_STATE_* values ) */ |
nkeynes@586 | 89 | }; |
nkeynes@586 | 90 | |
nkeynes@586 | 91 | extern struct sh4_registers sh4r; |
nkeynes@586 | 92 | |
nkeynes@586 | 93 | /** |
nkeynes@586 | 94 | * Switch between translation and emulation execution modes. Note that this |
nkeynes@586 | 95 | * should only be used while the system is stopped. If the system was built |
nkeynes@586 | 96 | * without translation support, this method has no effect. |
nkeynes@586 | 97 | * |
nkeynes@586 | 98 | * @param use TRUE for translation mode, FALSE for emulation mode. |
nkeynes@586 | 99 | */ |
nkeynes@740 | 100 | void sh4_translate_set_enabled( gboolean use ); |
nkeynes@586 | 101 | |
nkeynes@586 | 102 | /** |
nkeynes@586 | 103 | * Test if system is currently using the translation engine. |
nkeynes@586 | 104 | */ |
nkeynes@740 | 105 | gboolean sh4_translate_is_enabled(); |
nkeynes@586 | 106 | |
nkeynes@586 | 107 | /** |
nkeynes@586 | 108 | * Explicitly set the SH4 PC to the supplied value - this will be the next |
nkeynes@586 | 109 | * instruction executed. This should only be called while the system is stopped. |
nkeynes@586 | 110 | */ |
nkeynes@586 | 111 | void sh4_set_pc( int pc ); |
nkeynes@586 | 112 | |
nkeynes@586 | 113 | /** |
nkeynes@586 | 114 | * Execute (using the emulator) a single instruction (in other words, perform a |
nkeynes@586 | 115 | * single-step operation). |
nkeynes@586 | 116 | */ |
nkeynes@586 | 117 | gboolean sh4_execute_instruction( void ); |
nkeynes@586 | 118 | |
nkeynes@586 | 119 | /* SH4 breakpoints */ |
nkeynes@586 | 120 | void sh4_set_breakpoint( uint32_t pc, breakpoint_type_t type ); |
nkeynes@586 | 121 | gboolean sh4_clear_breakpoint( uint32_t pc, breakpoint_type_t type ); |
nkeynes@586 | 122 | int sh4_get_breakpoint( uint32_t pc ); |
nkeynes@586 | 123 | |
nkeynes@586 | 124 | #ifdef __cplusplus |
nkeynes@586 | 125 | } |
nkeynes@586 | 126 | #endif |
nkeynes@586 | 127 | #endif /* !lxdream_sh4_H */ |
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