2 * $Id: sh4core.h,v 1.10 2006-01-01 08:08:40 nkeynes Exp $
4 * This file defines the internal functions exported/used by the SH4 core,
5 * except for disassembly functions defined in sh4dasm.h
7 * Copyright (c) 2005 Nathan Keynes.
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.
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.
23 #include <glib/gtypes.h>
36 * SH4 is running normally
38 #define SH4_STATE_RUNNING 1
40 * SH4 is not executing instructions but all peripheral modules are still
43 #define SH4_STATE_SLEEP 2
45 * SH4 is not executing instructions, DMAC is halted, but all other peripheral
46 * modules are still running
48 #define SH4_STATE_DEEP_SLEEP 3
50 * SH4 is not executing instructions and all peripheral modules are also
51 * stopped. As close as you can get to powered-off without actually being
54 #define SH4_STATE_STANDBY 4
56 struct sh4_registers {
58 uint32_t r_bank[8]; /* hidden banked registers */
59 uint32_t sr, gbr, ssr, spc, sgr, dbr, vbr;
60 uint32_t pr, pc, fpul, fpscr;
62 uint32_t m, q, s, t; /* really boolean - 0 or 1 */
65 int32_t store_queue[16]; /* technically 2 banks of 32 bytes */
67 uint32_t new_pc; /* Not a real register, but used to handle delay slots */
68 uint32_t icount; /* Also not a real register, instruction counter */
69 uint32_t int_pending; /* flag set by the INTC = pending priority level */
70 int in_delay_slot; /* flag to indicate the current instruction is in
71 * a delay slot (certain rules apply) */
72 uint32_t slice_cycle; /* Current cycle within the timeslice */
73 int sh4_state; /* Current power-on state (one of the SH4_STATE_* values ) */
76 extern struct sh4_registers sh4r;
78 /* Public functions */
80 void sh4_init( void );
81 void sh4_reset( void );
83 void sh4_runto( uint32_t pc, uint32_t count );
84 void sh4_runfor( uint32_t count );
85 int sh4_isrunning( void );
86 void sh4_stop( void );
87 void sh4_set_pc( int );
88 gboolean sh4_execute_instruction( void );
89 void sh4_raise_exception( int, int );
90 void sh4_set_breakpoint( uint32_t pc, int type );
91 gboolean sh4_clear_breakpoint( uint32_t pc, int type );
92 int sh4_get_breakpoint( uint32_t pc );
94 #define BREAK_ONESHOT 1
98 int32_t sh4_read_long( uint32_t addr );
99 int32_t sh4_read_word( uint32_t addr );
100 int32_t sh4_read_byte( uint32_t addr );
101 void sh4_write_long( uint32_t addr, uint32_t val );
102 void sh4_write_word( uint32_t addr, uint32_t val );
103 void sh4_write_byte( uint32_t addr, uint32_t val );
104 int32_t sh4_read_phys_word( uint32_t addr );
106 /* Peripheral functions */
107 void TMU_run_slice( uint32_t );
108 void TMU_update_clocks( void );
109 void TMU_reset( void );
110 void TMU_save_state( FILE * );
111 int TMU_load_state( FILE * );
112 void DMAC_reset( void );
113 void DMAC_run_slice( uint32_t );
114 void DMAC_save_state( FILE * );
115 int DMAC_load_state( FILE * );
116 void SCIF_reset( void );
117 void SCIF_run_slice( uint32_t );
118 void SCIF_save_state( FILE *f );
119 int SCIF_load_state( FILE *f );
121 #define SIGNEXT4(n) ((((int32_t)(n))<<28)>>28)
122 #define SIGNEXT8(n) ((int32_t)((int8_t)(n)))
123 #define SIGNEXT12(n) ((((int32_t)(n))<<20)>>20)
124 #define SIGNEXT16(n) ((int32_t)((int16_t)(n)))
125 #define SIGNEXT32(n) ((int64_t)((int32_t)(n)))
126 #define SIGNEXT48(n) ((((int64_t)(n))<<16)>>16)
128 /* Status Register (SR) bits */
129 #define SR_MD 0x40000000 /* Processor mode ( User=0, Privileged=1 ) */
130 #define SR_RB 0x20000000 /* Register bank (priviledged mode only) */
131 #define SR_BL 0x10000000 /* Exception/interupt block (1 = masked) */
132 #define SR_FD 0x00008000 /* FPU disable */
133 #define SR_M 0x00000200
134 #define SR_Q 0x00000100
135 #define SR_IMASK 0x000000F0 /* Interrupt mask level */
136 #define SR_S 0x00000002 /* Saturation operation for MAC instructions */
137 #define SR_T 0x00000001 /* True/false or carry/borrow */
138 #define SR_MASK 0x700083F3
139 #define SR_MQSTMASK 0xFFFFFCFC /* Mask to clear the flags we're keeping separately */
141 #define IS_SH4_PRIVMODE() (sh4r.sr&SR_MD)
142 #define SH4_INTMASK() ((sh4r.sr&SR_IMASK)>>4)
143 #define SH4_INT_PENDING() (sh4r.int_pending && !sh4r.in_delay_slot)
145 #define FPSCR_FR 0x00200000 /* FPU register bank */
146 #define FPSCR_SZ 0x00100000 /* FPU transfer size (0=32 bits, 1=64 bits) */
147 #define FPSCR_PR 0x00080000 /* Precision (0=32 bites, 1=64 bits) */
148 #define FPSCR_DN 0x00040000 /* Denormalization mode (1 = treat as 0) */
149 #define FPSCR_CAUSE 0x0003F000
150 #define FPSCR_ENABLE 0x00000F80
151 #define FPSCR_FLAG 0x0000007C
152 #define FPSCR_RM 0x00000003 /* Rounding mode (0=nearest, 1=to zero) */
154 #define IS_FPU_DOUBLEPREC() (sh4r.fpscr&FPSCR_PR)
155 #define IS_FPU_DOUBLESIZE() (sh4r.fpscr&FPSCR_SZ)
156 #define IS_FPU_ENABLED() ((sh4r.sr&SR_FD)==0)
158 #define FR sh4r.fr[(sh4r.fpscr&FPSCR_FR)>>21]
159 #define XF sh4r.fr[((~sh4r.fpscr)&FPSCR_FR)>>21]
161 /* Exceptions (for use with sh4_raise_exception) */
163 #define EX_ILLEGAL_INSTRUCTION 0x180, 0x100
164 #define EX_SLOT_ILLEGAL 0x1A0, 0x100
165 #define EX_TLB_MISS_READ 0x040, 0x400
166 #define EX_TLB_MISS_WRITE 0x060, 0x400
167 #define EX_INIT_PAGE_WRITE 0x080, 0x100
168 #define EX_TLB_PROT_READ 0x0A0, 0x100
169 #define EX_TLB_PROT_WRITE 0x0C0, 0x100
170 #define EX_DATA_ADDR_READ 0x0E0, 0x100
171 #define EX_DATA_ADDR_WRITE 0x100, 0x100
172 #define EX_FPU_EXCEPTION 0x120, 0x100
173 #define EX_TRAPA 0x160, 0x100
174 #define EX_BREAKPOINT 0x1E0, 0x100
175 #define EX_FPU_DISABLED 0x800, 0x100
176 #define EX_SLOT_FPU_DISABLED 0x820, 0x100
178 #define SH4_WRITE_STORE_QUEUE(addr,val) sh4r.store_queue[(addr>>2)&0xF] = val;
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