X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=cpu%2Fsh2%2Fsh2.h;h=e945354d3fd0340d7c26d4590750617dc37a410e;hb=e9a11abb3c8237286fd7b6c4b5048d9eec9b1a1b;hp=e15259d5433e272cf16dabbb7bc5c0bab38802b0;hpb=b4db550e41b2aa277f570d7bff890c8e8ee1831f;p=picodrive.git

diff --git a/cpu/sh2/sh2.h b/cpu/sh2/sh2.h
index e15259d..e945354 100644
--- a/cpu/sh2/sh2.h
+++ b/cpu/sh2/sh2.h
@@ -1,11 +1,7 @@
 #ifndef __SH2_H__
 #define __SH2_H__
 
-#if !defined(REGPARM) && defined(__i386__) 
-#define REGPARM(x) __attribute__((regparm(x)))
-#else
-#define REGPARM(x)
-#endif
+#include "../../pico/pico_port.h"
 
 // registers - matches structure order
 typedef enum {
@@ -39,6 +35,15 @@ typedef struct SH2_
 	void		*p_rom;
 	unsigned int	pdb_io_csum[2];
 
+#define SH2_STATE_RUN   (1 << 0)	// to prevent recursion
+#define SH2_STATE_SLEEP (1 << 1)
+#define SH2_STATE_CPOLL (1 << 2)	// polling comm regs
+#define SH2_STATE_VPOLL (1 << 3)	// polling VDP
+	unsigned int	state;
+	unsigned int	poll_addr;
+	int		poll_cycles;
+	int		poll_cnt;
+
 	// interpreter stuff
 	int		icount;		// cycles left in current timeslice
 	unsigned int	ea;
@@ -52,22 +57,51 @@ typedef struct SH2_
 	int	REGPARM(2) (*irq_callback)(struct SH2_ *sh2, int level);
 	int	is_slave;
 
-	unsigned int	cycles_aim;	// subtract sh2_icount to get global counter
-	unsigned int	cycles_done;
+	unsigned int	cycles_timeslice;
+
+	struct SH2_	*other_sh2;
+
+	// we use 68k reference cycles for easier sync
+	unsigned int	m68krcycles_done;
+	unsigned int	mult_m68k_to_sh2;
+	unsigned int	mult_sh2_to_m68k;
+
+	unsigned char	data_array[0x1000]; // cache (can be used as RAM)
+	unsigned int	peri_regs[0x200/4]; // periphereal regs
 } SH2;
 
-extern SH2 *sh2; // active sh2. XXX: consider removing
+#define CYCLE_MULT_SHIFT 10
+#define C_M68K_TO_SH2(xsh2, c) \
+	((int)((c) * (xsh2).mult_m68k_to_sh2) >> CYCLE_MULT_SHIFT)
+#define C_SH2_TO_M68K(xsh2, c) \
+	((int)((c + 3) * (xsh2).mult_sh2_to_m68k) >> CYCLE_MULT_SHIFT)
 
-int  sh2_init(SH2 *sh2, int is_slave);
+int  sh2_init(SH2 *sh2, int is_slave, SH2 *other_sh2);
 void sh2_finish(SH2 *sh2);
 void sh2_reset(SH2 *sh2);
-void sh2_irl_irq(SH2 *sh2, int level, int nested_call);
+int  sh2_irl_irq(SH2 *sh2, int level, int nested_call);
 void sh2_internal_irq(SH2 *sh2, int level, int vector);
 void sh2_do_irq(SH2 *sh2, int level, int vector);
 void sh2_pack(const SH2 *sh2, unsigned char *buff);
 void sh2_unpack(SH2 *sh2, const unsigned char *buff);
 
-void sh2_execute(SH2 *sh2, int cycles);
+int  sh2_execute_drc(SH2 *sh2c, int cycles);
+int  sh2_execute_interpreter(SH2 *sh2c, int cycles);
+
+static __inline int sh2_execute(SH2 *sh2, int cycles, int use_drc)
+{
+  int ret;
+
+  sh2->cycles_timeslice = cycles;
+#ifdef DRC_SH2
+  if (use_drc)
+    ret = sh2_execute_drc(sh2, cycles);
+  else
+#endif
+    ret = sh2_execute_interpreter(sh2, cycles);
+
+  return sh2->cycles_timeslice - ret;
+}
 
 // regs, pending_int*, cycles, reserved
 #define SH2_STATE_SIZE ((24 + 2 + 2 + 12) * 4)
@@ -77,8 +111,14 @@ void sh2_execute(SH2 *sh2, int cycles);
 unsigned int REGPARM(2) p32x_sh2_read8(unsigned int a, SH2 *sh2);
 unsigned int REGPARM(2) p32x_sh2_read16(unsigned int a, SH2 *sh2);
 unsigned int REGPARM(2) p32x_sh2_read32(unsigned int a, SH2 *sh2);
-int REGPARM(3) p32x_sh2_write8 (unsigned int a, unsigned int d, SH2 *sh2);
-int REGPARM(3) p32x_sh2_write16(unsigned int a, unsigned int d, SH2 *sh2);
-int REGPARM(3) p32x_sh2_write32(unsigned int a, unsigned int d, SH2 *sh2);
+void REGPARM(3) p32x_sh2_write8 (unsigned int a, unsigned int d, SH2 *sh2);
+void REGPARM(3) p32x_sh2_write16(unsigned int a, unsigned int d, SH2 *sh2);
+void REGPARM(3) p32x_sh2_write32(unsigned int a, unsigned int d, SH2 *sh2);
+
+// debug
+#ifdef DRC_CMP
+void do_sh2_trace(SH2 *current, int cycles);
+void do_sh2_cmp(SH2 *current);
+#endif
 
 #endif /* __SH2_H__ */