lxdream 0.9.1| filename | src/sh4/sh4.h |
| changeset | 571:9bc09948d0f2 |
| prev | 566:59be465e5f01 |
| next | 1065:bc1cc0c54917 |
| author | nkeynes |
| date | Mon Jan 14 10:23:49 2008 +0000 (16 years ago) |
| branch | lxdream-mmu |
| permissions | -rw-r--r-- |
| last change | Remove asm file and convert to inline (easier to cope with platform conventions) Add breakpoint support Add MMU store-queue support |
| view | annotate | diff | log | raw |
1 /**
2 * $Id: sh4.h 577 2008-01-01 05:08:38Z nkeynes $
3 *
4 * This file defines the public functions and definitions exported by the SH4
5 * modules.
6 *
7 * Copyright (c) 2005 Nathan Keynes.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
20 #ifndef lxdream_sh4_H
21 #define lxdream_sh4_H 1
23 #include "lxdream.h"
24 #include "mem.h"
26 #ifdef __cplusplus
27 extern "C" {
28 #endif
31 /**
32 * SH4 is running normally
33 */
34 #define SH4_STATE_RUNNING 1
35 /**
36 * SH4 is not executing instructions but all peripheral modules are still
37 * running
38 */
39 #define SH4_STATE_SLEEP 2
40 /**
41 * SH4 is not executing instructions, DMAC is halted, but all other peripheral
42 * modules are still running
43 */
44 #define SH4_STATE_DEEP_SLEEP 3
45 /**
46 * SH4 is not executing instructions and all peripheral modules are also
47 * stopped. As close as you can get to powered-off without actually being
48 * off.
49 */
50 #define SH4_STATE_STANDBY 4
52 /**
53 * sh4r.event_types flag indicating a pending IRQ
54 */
55 #define PENDING_IRQ 1
57 /**
58 * sh4r.event_types flag indicating a pending event (from the event queue)
59 */
60 #define PENDING_EVENT 2
62 /**
63 * SH4 register structure
64 */
65 struct sh4_registers {
66 uint32_t r[16];
67 uint32_t sr, pr, pc, fpscr;
68 uint32_t t, m, q, s; /* really boolean - 0 or 1 */
69 int32_t fpul;
70 float *fr_bank;
71 float fr[2][16];
72 uint64_t mac;
73 uint32_t gbr, ssr, spc, sgr, dbr, vbr;
75 uint32_t r_bank[8]; /* hidden banked registers */
76 int32_t store_queue[16]; /* technically 2 banks of 32 bytes */
78 uint32_t new_pc; /* Not a real register, but used to handle delay slots */
79 uint32_t event_pending; /* slice cycle time of the next pending event, or FFFFFFFF
80 when no events are pending */
81 uint32_t event_types; /* bit 0 = IRQ pending, bit 1 = general event pending */
82 int in_delay_slot; /* flag to indicate the current instruction is in
83 * a delay slot (certain rules apply) */
84 uint32_t slice_cycle; /* Current nanosecond within the timeslice */
85 int sh4_state; /* Current power-on state (one of the SH4_STATE_* values ) */
86 };
88 extern struct sh4_registers sh4r;
90 /**
91 * Switch between translation and emulation execution modes. Note that this
92 * should only be used while the system is stopped. If the system was built
93 * without translation support, this method has no effect.
94 *
95 * @param use TRUE for translation mode, FALSE for emulation mode.
96 */
97 void sh4_set_use_xlat( gboolean use );
99 /**
100 * Test if system is currently using the translation engine.
101 */
102 gboolean sh4_is_using_xlat();
104 /**
105 * Explicitly set the SH4 PC to the supplied value - this will be the next
106 * instruction executed. This should only be called while the system is stopped.
107 */
108 void sh4_set_pc( int pc );
110 /**
111 * Execute (using the emulator) a single instruction (in other words, perform a
112 * single-step operation).
113 */
114 gboolean sh4_execute_instruction( void );
116 /* SH4 breakpoints */
117 void sh4_set_breakpoint( uint32_t pc, breakpoint_type_t type );
118 gboolean sh4_clear_breakpoint( uint32_t pc, breakpoint_type_t type );
119 int sh4_get_breakpoint( uint32_t pc );
121 #ifdef __cplusplus
122 }
123 #endif
124 #endif /* !lxdream_sh4_H */
.