| 1 | // |
| 2 | // Common definitions for the UAE 68000 core |
| 3 | // |
| 4 | // by James Hammons |
| 5 | // (C) 2011 Underground Software |
| 6 | // |
| 7 | // This file is distributed under the GNU Public License, version 3 or at your |
| 8 | // option any later version. Read the file GPLv3 for details. |
| 9 | // |
| 10 | |
| 11 | #ifndef __CPUDEFS_H__ |
| 12 | #define __CPUDEFS_H__ |
| 13 | |
| 14 | #include "sysdeps.h" |
| 15 | |
| 16 | /* Special flags */ |
| 17 | #define SPCFLAG_DEBUGGER 0x001 |
| 18 | #define SPCFLAG_STOP 0x002 |
| 19 | #define SPCFLAG_BUSERROR 0x004 |
| 20 | #define SPCFLAG_INT 0x008 |
| 21 | #define SPCFLAG_BRK 0x010 |
| 22 | #define SPCFLAG_EXTRA_CYCLES 0x020 |
| 23 | #define SPCFLAG_TRACE 0x040 |
| 24 | #define SPCFLAG_DOTRACE 0x080 |
| 25 | #define SPCFLAG_DOINT 0x100 |
| 26 | #define SPCFLAG_MFP 0x200 |
| 27 | #define SPCFLAG_EXEC 0x400 |
| 28 | #define SPCFLAG_MODE_CHANGE 0x800 |
| 29 | |
| 30 | struct regstruct |
| 31 | { |
| 32 | uint32_t regs[16]; |
| 33 | uint32_t usp, isp; |
| 34 | uint16_t sr; |
| 35 | uint8_t s; |
| 36 | uint8_t stopped; |
| 37 | int intmask; |
| 38 | int intLevel; |
| 39 | |
| 40 | unsigned int c; |
| 41 | unsigned int z; |
| 42 | unsigned int n; |
| 43 | unsigned int v; |
| 44 | unsigned int x; |
| 45 | |
| 46 | uint32_t pc; |
| 47 | uint8_t * pc_p; |
| 48 | uint8_t * pc_oldp; |
| 49 | |
| 50 | uint32_t spcflags; |
| 51 | |
| 52 | uint32_t prefetch_pc; |
| 53 | uint32_t prefetch; |
| 54 | |
| 55 | int32_t remainingCycles; |
| 56 | uint32_t interruptCycles; |
| 57 | }; |
| 58 | |
| 59 | extern struct regstruct regs, lastint_regs; |
| 60 | |
| 61 | #define m68k_dreg(r, num) ((r).regs[(num)]) |
| 62 | #define m68k_areg(r, num) (((r).regs + 8)[(num)]) |
| 63 | |
| 64 | #define ZFLG (regs.z) |
| 65 | #define NFLG (regs.n) |
| 66 | #define CFLG (regs.c) |
| 67 | #define VFLG (regs.v) |
| 68 | #define XFLG (regs.x) |
| 69 | |
| 70 | /* Possible exceptions sources for M68000_Exception() and Exception() */ |
| 71 | #define M68000_EXC_SRC_CPU 1 /* Direct CPU exception */ |
| 72 | #define M68000_EXC_SRC_AUTOVEC 2 /* Auto-vector exception (e.g. VBL) */ |
| 73 | //#define M68000_EXC_SRC_INT_MFP 3 /* MFP interrupt exception */ |
| 74 | //#define M68000_EXC_SRC_INT_DSP 4 /* DSP interrupt exception */ |
| 75 | |
| 76 | #define SET_CFLG(x) (CFLG = (x)) |
| 77 | #define SET_NFLG(x) (NFLG = (x)) |
| 78 | #define SET_VFLG(x) (VFLG = (x)) |
| 79 | #define SET_ZFLG(x) (ZFLG = (x)) |
| 80 | #define SET_XFLG(x) (XFLG = (x)) |
| 81 | |
| 82 | #define GET_CFLG CFLG |
| 83 | #define GET_NFLG NFLG |
| 84 | #define GET_VFLG VFLG |
| 85 | #define GET_ZFLG ZFLG |
| 86 | #define GET_XFLG XFLG |
| 87 | |
| 88 | #define CLEAR_CZNV do { \ |
| 89 | SET_CFLG(0); \ |
| 90 | SET_ZFLG(0); \ |
| 91 | SET_NFLG(0); \ |
| 92 | SET_VFLG(0); \ |
| 93 | } while (0) |
| 94 | |
| 95 | #define COPY_CARRY (SET_XFLG(GET_CFLG)) |
| 96 | |
| 97 | #endif // __CPUDEFS_H__ |