initial import

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@2 be3aeb3a-fb24-0410-a615-afba39da0efa

cpu/Cyclone/Cyclone.h

@@ -0,0 +1,58 @@
+
+// Cyclone 68000 Emulator - Header File
+
+// Most code (c) Copyright 2004 Dave, All rights reserved.
+// Some coding/bugfixing was done by notaz
+// Cyclone 68000 is free for non-commercial use.
+
+// For commercial use, separate licencing terms must be obtained.
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int CycloneVer; // Version number of library
+
+struct Cyclone
+{
+  unsigned int d[8];   // [r7,#0x00]
+  unsigned int a[8];   // [r7,#0x20]
+  unsigned int pc;     // [r7,#0x40] Memory Base+PC
+  unsigned char srh;   // [r7,#0x44] Status Register high (T_S__III)
+  unsigned char xc;    // [r7,#0x45] Extend flag (____??X?)
+  unsigned char flags; // [r7,#0x46] Flags (ARM order: ____NZCV) [68k order is XNZVC]
+  unsigned char irq;   // [r7,#0x47] IRQ level
+  unsigned int osp;    // [r7,#0x48] Other Stack Pointer (USP/SSP)
+  unsigned int vector; // [r7,#0x4c] IRQ vector (temporary)
+  unsigned int pad1[2];
+  int stopped;         // [r7,#0x58] 1 == processor is in stopped state
+  int cycles;          // [r7,#0x5c]
+  int membase;         // [r7,#0x60] Memory Base (ARM address minus 68000 address)
+  unsigned int   (*checkpc)(unsigned int pc); // [r7,#0x64] - Called to recalc Memory Base+pc
+  unsigned char  (*read8  )(unsigned int a);  // [r7,#0x68]
+  unsigned short (*read16 )(unsigned int a);  // [r7,#0x6c]
+  unsigned int   (*read32 )(unsigned int a);  // [r7,#0x70]
+  void (*write8 )(unsigned int a,unsigned char  d); // [r7,#0x74]
+  void (*write16)(unsigned int a,unsigned short d); // [r7,#0x78]
+  void (*write32)(unsigned int a,unsigned int   d); // [r7,#0x7c]
+  unsigned char  (*fetch8 )(unsigned int a);  // [r7,#0x80]
+  unsigned short (*fetch16)(unsigned int a);  // [r7,#0x84]
+  unsigned int   (*fetch32)(unsigned int a);  // [r7,#0x88]
+  void (*IrqCallback)(int int_level);         // [r7,#0x8c] - optional irq callback function, see config.h
+  void (*ResetCallback)();                    // [r7,#0x90] - if enabled in config.h, calls this whenever RESET opcode is encountered.
+  int  (*UnrecognizedCallback)();             // [r7,#0x94] - if enabled in config.h, calls this whenever unrecognized opcode is encountered.
+};
+
+// used only if Cyclone was compiled with compressed jumptable, see config.h
+void CycloneInit();
+
+// run cyclone. Cycles should be specified in context (pcy->cycles)
+void CycloneRun(struct Cyclone *pcy);
+
+// utility functions to get and set SR
+void CycloneSetSr(struct Cyclone *pcy, unsigned int sr); // auto-swaps a7<->osp if detects supervisor change
+unsigned int CycloneGetSr(struct Cyclone *pcy);
+
+#ifdef __cplusplus
+} // End of extern "C"
+#endif