nkeynes@10: /** nkeynes@10: * $Id: sh4core.h,v 1.3 2005-12-11 05:15:36 nkeynes Exp $ nkeynes@10: * nkeynes@10: * This file defines the public functions exported by the SH4 core, except nkeynes@10: * for disassembly functions defined in sh4dasm.h nkeynes@10: * nkeynes@10: * Copyright (c) 2005 Nathan Keynes. nkeynes@10: * nkeynes@10: * This program is free software; you can redistribute it and/or modify nkeynes@10: * it under the terms of the GNU General Public License as published by nkeynes@10: * the Free Software Foundation; either version 2 of the License, or nkeynes@10: * (at your option) any later version. nkeynes@10: * nkeynes@10: * This program is distributed in the hope that it will be useful, nkeynes@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of nkeynes@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the nkeynes@10: * GNU General Public License for more details. nkeynes@1: */ nkeynes@1: #ifndef sh4core_H nkeynes@1: #define sh4core_H 1 nkeynes@1: nkeynes@1: #include nkeynes@1: nkeynes@1: #ifdef __cplusplus nkeynes@1: extern "C" { nkeynes@1: #if 0 nkeynes@1: } nkeynes@1: #endif nkeynes@1: #endif nkeynes@1: nkeynes@1: struct sh4_registers { nkeynes@1: uint32_t r[16]; nkeynes@1: uint32_t r_bank[8]; /* hidden banked registers */ nkeynes@1: uint32_t sr, gbr, ssr, spc, sgr, dbr, vbr; nkeynes@1: uint32_t pr, pc, fpul, fpscr; nkeynes@1: uint64_t mac; nkeynes@1: uint32_t m, q, s, t; /* really boolean - 0 or 1 */ nkeynes@1: float fr[2][16]; nkeynes@1: nkeynes@2: int32_t store_queue[16]; /* technically 2 banks of 32 bytes */ nkeynes@2: nkeynes@1: uint32_t new_pc; /* Not a real register, but used to handle delay slots */ nkeynes@1: uint32_t icount; /* Also not a real register, instruction counter */ nkeynes@1: uint32_t int_pending; /* flag set by the INTC = pending priority level */ nkeynes@2: int in_delay_slot; /* flag to indicate the current instruction is in nkeynes@2: * a delay slot (certain rules apply) */ nkeynes@1: }; nkeynes@1: nkeynes@1: extern struct sh4_registers sh4r; nkeynes@1: nkeynes@1: /* Public functions */ nkeynes@1: nkeynes@1: void sh4_init( void ); nkeynes@1: void sh4_reset( void ); nkeynes@1: void sh4_run( void ); nkeynes@1: void sh4_runto( uint32_t pc, uint32_t count ); nkeynes@1: void sh4_runfor( uint32_t count ); nkeynes@1: int sh4_isrunning( void ); nkeynes@1: void sh4_stop( void ); nkeynes@1: void sh4_set_pc( int ); nkeynes@1: void sh4_execute_instruction( void ); nkeynes@1: void sh4_raise_exception( int, int ); nkeynes@1: nkeynes@10: /* SH4 Memory */ nkeynes@10: int32_t sh4_read_long( uint32_t addr ); nkeynes@10: int32_t sh4_read_word( uint32_t addr ); nkeynes@10: int32_t sh4_read_byte( uint32_t addr ); nkeynes@10: void sh4_write_long( uint32_t addr, uint32_t val ); nkeynes@10: void sh4_write_word( uint32_t addr, uint32_t val ); nkeynes@10: void sh4_write_byte( uint32_t addr, uint32_t val ); nkeynes@10: int32_t sh4_read_phys_word( uint32_t addr ); nkeynes@10: nkeynes@1: void run_timers( int ); nkeynes@1: nkeynes@1: #define SIGNEXT4(n) ((((int32_t)(n))<<28)>>28) nkeynes@1: #define SIGNEXT8(n) ((int32_t)((int8_t)(n))) nkeynes@1: #define SIGNEXT12(n) ((((int32_t)(n))<<20)>>20) nkeynes@1: #define SIGNEXT16(n) ((int32_t)((int16_t)(n))) nkeynes@1: #define SIGNEXT32(n) ((int64_t)((int32_t)(n))) nkeynes@1: #define SIGNEXT48(n) ((((int64_t)(n))<<16)>>16) nkeynes@1: nkeynes@1: /* Status Register (SR) bits */ nkeynes@1: #define SR_MD 0x40000000 /* Processor mode ( User=0, Privileged=1 ) */ nkeynes@1: #define SR_RB 0x20000000 /* Register bank (priviledged mode only) */ nkeynes@1: #define SR_BL 0x10000000 /* Exception/interupt block (1 = masked) */ nkeynes@1: #define SR_FD 0x00008000 /* FPU disable */ nkeynes@1: #define SR_M 0x00000200 nkeynes@1: #define SR_Q 0x00000100 nkeynes@1: #define SR_IMASK 0x000000F0 /* Interrupt mask level */ nkeynes@1: #define SR_S 0x00000002 /* Saturation operation for MAC instructions */ nkeynes@1: #define SR_T 0x00000001 /* True/false or carry/borrow */ nkeynes@1: #define SR_MASK 0x700083F3 nkeynes@1: #define SR_MQSTMASK 0xFFFFFCFC /* Mask to clear the flags we're keeping separately */ nkeynes@1: nkeynes@1: #define IS_SH4_PRIVMODE() (sh4r.sr&SR_MD) nkeynes@1: #define SH4_INTMASK() ((sh4r.sr&SR_IMASK)>>4) nkeynes@2: #define SH4_INT_PENDING() (sh4r.int_pending && !sh4r.in_delay_slot) nkeynes@1: nkeynes@1: #define FPSCR_FR 0x00200000 /* FPU register bank */ nkeynes@1: #define FPSCR_SZ 0x00100000 /* FPU transfer size (0=32 bits, 1=64 bits) */ nkeynes@1: #define FPSCR_PR 0x00080000 /* Precision (0=32 bites, 1=64 bits) */ nkeynes@1: #define FPSCR_DN 0x00040000 /* Denormalization mode (1 = treat as 0) */ nkeynes@1: #define FPSCR_CAUSE 0x0003F000 nkeynes@1: #define FPSCR_ENABLE 0x00000F80 nkeynes@1: #define FPSCR_FLAG 0x0000007C nkeynes@1: #define FPSCR_RM 0x00000003 /* Rounding mode (0=nearest, 1=to zero) */ nkeynes@1: nkeynes@1: #define IS_FPU_DOUBLEPREC() (sh4r.fpscr&FPSCR_PR) nkeynes@1: #define IS_FPU_DOUBLESIZE() (sh4r.fpscr&FPSCR_SZ) nkeynes@1: #define IS_FPU_ENABLED() ((sh4r.sr&SR_FD)==0) nkeynes@1: nkeynes@1: #define FR sh4r.fr[(sh4r.fpscr&FPSCR_FR)>>21] nkeynes@2: #define XF sh4r.fr[((~sh4r.fpscr)&FPSCR_FR)>>21] nkeynes@1: nkeynes@1: /* Exceptions (for use with sh4_raise_exception) */ nkeynes@1: nkeynes@1: #define EX_ILLEGAL_INSTRUCTION 0x180, 0x100 nkeynes@1: #define EX_SLOT_ILLEGAL 0x1A0, 0x100 nkeynes@1: #define EX_TLB_MISS_READ 0x040, 0x400 nkeynes@1: #define EX_TLB_MISS_WRITE 0x060, 0x400 nkeynes@1: #define EX_INIT_PAGE_WRITE 0x080, 0x100 nkeynes@1: #define EX_TLB_PROT_READ 0x0A0, 0x100 nkeynes@1: #define EX_TLB_PROT_WRITE 0x0C0, 0x100 nkeynes@1: #define EX_DATA_ADDR_READ 0x0E0, 0x100 nkeynes@1: #define EX_DATA_ADDR_WRITE 0x100, 0x100 nkeynes@1: #define EX_FPU_EXCEPTION 0x120, 0x100 nkeynes@1: #define EX_TRAPA 0x160, 0x100 nkeynes@1: #define EX_BREAKPOINT 0x1E0, 0x100 nkeynes@1: #define EX_FPU_DISABLED 0x800, 0x100 nkeynes@1: #define EX_SLOT_FPU_DISABLED 0x820, 0x100 nkeynes@1: nkeynes@2: #define SH4_WRITE_STORE_QUEUE(addr,val) sh4r.store_queue[(addr>>2)&0xF] = val; nkeynes@1: nkeynes@1: #ifdef __cplusplus nkeynes@1: } nkeynes@1: #endif nkeynes@1: #endif