famec: split fm68k_emulate

[picodrive.git] / cpu / fame / fame.h

diff --git a/cpu/fame/fame.h b/cpu/fame/fame.h
index 7b12343..93172c8 100644 (file)
--- a/cpu/fame/fame.h
+++ b/cpu/fame/fame.h
@@ -18,13 +18,13 @@ extern "C" {
 #define M68K_FETCHBANK1 (1 << FAMEC_FETCHBITS)\r
 \r
 //#define M68K_RUNNING    0x01\r
-#define M68K_HALTED     0x80\r
-#define M68K_WAITING    0x04\r
-#define M68K_DISABLE    0x20\r
-#define M68K_FAULTED    0x40\r
-#define M68K_EMULATE_GROUP_0  0x02\r
-#define M68K_EMULATE_TRACE    0x08\r
-#define M68K_DO_TRACE    0x10\r
+#define FM68K_HALTED     0x80\r
+//#define M68K_WAITING    0x04\r
+//#define M68K_DISABLE    0x20\r
+//#define M68K_FAULTED    0x40\r
+#define FM68K_EMULATE_GROUP_0  0x02\r
+#define FM68K_EMULATE_TRACE    0x08\r
+#define FM68K_DO_TRACE    0x10\r
 \r
 \r
 /************************************/\r
@@ -92,29 +92,6 @@ extern "C" {
 /* Data definition */\r
 /*******************/\r
 \r
-/* M68K registers */\r
-typedef enum {\r
-      M68K_REG_D0=0,\r
-      M68K_REG_D1,\r
-      M68K_REG_D2,\r
-      M68K_REG_D3,\r
-      M68K_REG_D4,\r
-      M68K_REG_D5,\r
-      M68K_REG_D6,\r
-      M68K_REG_D7,\r
-      M68K_REG_A0,\r
-      M68K_REG_A1,\r
-      M68K_REG_A2,\r
-      M68K_REG_A3,\r
-      M68K_REG_A4,\r
-      M68K_REG_A5,\r
-      M68K_REG_A6,\r
-      M68K_REG_A7,\r
-      M68K_REG_ASP,\r
-      M68K_REG_PC,\r
-      M68K_REG_SR\r
-} m68k_register;\r
-\r
 typedef union\r
 {\r
        unsigned char B;\r
@@ -145,24 +122,52 @@ typedef struct
        unsigned short execinfo;\r
        // PD extension\r
        int            io_cycle_counter; // cycles left\r
-       unsigned int   Fetch[M68K_FETCHBANK1];\r
+\r
+       unsigned int   Opcode;\r
+       signed int     cycles_needed;\r
+\r
+       unsigned short *PC;\r
+       unsigned long  BasePC;\r
+       unsigned int   flag_C;\r
+       unsigned int   flag_V;\r
+       unsigned int   flag_NotZ;\r
+       unsigned int   flag_N;\r
+       unsigned int   flag_X;\r
+       unsigned int   flag_T;\r
+       unsigned int   flag_S;\r
+       unsigned int   flag_I;\r
+\r
+       unsigned char  not_polling;\r
+       unsigned char  pad[3];\r
+\r
+       unsigned long  Fetch[M68K_FETCHBANK1];\r
 } M68K_CONTEXT;\r
 \r
 extern M68K_CONTEXT *g_m68kcontext;\r
 \r
+typedef enum\r
+{\r
+       fm68k_reason_emulate = 0,\r
+       fm68k_reason_init,\r
+       fm68k_reason_idle_install,\r
+       fm68k_reason_idle_remove,\r
+} fm68k_call_reason;\r
+\r
 /************************/\r
 /* Function definition  */\r
 /************************/\r
 \r
 /* General purpose functions */\r
-void m68k_init(void);\r
-int  m68k_reset(void);\r
-int  m68k_emulate(int n);\r
+void fm68k_init(void);\r
+int  fm68k_reset(M68K_CONTEXT *ctx);\r
+int  fm68k_emulate(M68K_CONTEXT *ctx, int n, fm68k_call_reason reason);\r
+int  fm68k_would_interrupt(M68K_CONTEXT *ctx); // to be called from fm68k_emulate()\r
 \r
-unsigned m68k_get_pc(M68K_CONTEXT *context);\r
-unsigned m68k_get_register(M68K_CONTEXT *context, m68k_register reg);\r
-unsigned m68k_set_register(M68K_CONTEXT *context, m68k_register reg, unsigned value);\r
+unsigned fm68k_get_pc(M68K_CONTEXT *ctx);\r
 \r
+// PICODRIVE_HACK\r
+int fm68k_idle_install(void);\r
+int fm68k_idle_remove(void);\r
 \r
 #ifdef __cplusplus\r
 }\r