X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=pico%2F32x%2F32x.c;h=d0110c13593e1c17dc7c8ad6bffd3a1b53efa726;hb=f81107f59093904c3daac2e9c257261fddc6caf0;hp=94e696bb1dcf51c37c17a40691b7a683dc20b263;hpb=b081408f66662068a3d274f696bdabba5186b68e;p=picodrive.git

diff --git a/pico/32x/32x.c b/pico/32x/32x.c
index 94e696b..d0110c1 100644
--- a/pico/32x/32x.c
+++ b/pico/32x/32x.c
@@ -1,9 +1,19 @@
+/*
+ * PicoDrive
+ * (C) notaz, 2009,2010,2013
+ *
+ * This work is licensed under the terms of MAME license.
+ * See COPYING file in the top-level directory.
+ */
 #include "../pico_int.h"
 #include "../sound/ym2612.h"
+#include "../../cpu/sh2/compiler.h"
 
 struct Pico32x Pico32x;
 SH2 sh2s[2];
 
+#define SH2_IDLE_STATES (SH2_STATE_CPOLL|SH2_STATE_VPOLL|SH2_STATE_SLEEP)
+
 static int REGPARM(2) sh2_irq_cb(SH2 *sh2, int level)
 {
   if (sh2->pending_irl > sh2->pending_int_irq) {
@@ -19,9 +29,14 @@ static int REGPARM(2) sh2_irq_cb(SH2 *sh2, int level)
   }
 }
 
-void p32x_update_irls(void)
+// MUST specify active_sh2 when called from sh2 memhandlers
+void p32x_update_irls(SH2 *active_sh2, int m68k_cycles)
 {
   int irqs, mlvl = 0, slvl = 0;
+  int mrun, srun;
+
+  if (active_sh2 != NULL)
+    m68k_cycles = sh2_cycles_done_m68k(active_sh2);
 
   // msh2
   irqs = (Pico32x.sh2irqs | Pico32x.sh2irqi[0]) & ((Pico32x.sh2irq_mask[0] << 3) | P32XI_VRES);
@@ -35,12 +50,21 @@ void p32x_update_irls(void)
     slvl++;
   slvl *= 2;
 
-  elprintf(EL_32X, "update_irls: m %d, s %d", mlvl, slvl);
-  sh2_irl_irq(&msh2, mlvl);
-  sh2_irl_irq(&ssh2, slvl);
-  mlvl = mlvl ? 1 : 0;
-  slvl = slvl ? 1 : 0;
-  p32x_poll_event(mlvl | (slvl << 1), 0);
+  mrun = sh2_irl_irq(&msh2, mlvl, active_sh2 == &msh2);
+  if (mrun) {
+    p32x_sh2_poll_event(&msh2, SH2_IDLE_STATES, m68k_cycles);
+    if (active_sh2 == &msh2)
+      sh2_end_run(active_sh2, 1);
+  }
+
+  srun = sh2_irl_irq(&ssh2, slvl, active_sh2 == &ssh2);
+  if (srun) {
+    p32x_sh2_poll_event(&ssh2, SH2_IDLE_STATES, m68k_cycles);
+    if (active_sh2 == &ssh2)
+      sh2_end_run(active_sh2, 1);
+  }
+
+  elprintf(EL_32X, "update_irls: m %d/%d, s %d/%d", mlvl, mrun, slvl, srun);
 }
 
 void Pico32xStartup(void)
@@ -49,18 +73,22 @@ void Pico32xStartup(void)
 
   // TODO: OOM handling
   PicoAHW |= PAHW_32X;
-  sh2_init(&msh2, 0);
+  sh2_init(&msh2, 0, &ssh2);
   msh2.irq_callback = sh2_irq_cb;
-  sh2_init(&ssh2, 1);
+  sh2_init(&ssh2, 1, &msh2);
   ssh2.irq_callback = sh2_irq_cb;
 
   PicoMemSetup32x();
+  p32x_pwm_ctl_changed();
+  p32x_timers_recalc();
 
   if (!Pico.m.pal)
     Pico32x.vdp_regs[0] |= P32XV_nPAL;
 
-  PREG8(Pico32xMem->sh2_peri_regs[0], 4) =
-  PREG8(Pico32xMem->sh2_peri_regs[1], 4) = 0x84; // SCI SSR
+  PREG8(msh2.peri_regs, 4) =
+  PREG8(ssh2.peri_regs, 4) = 0x84; // SCI SSR
+
+  rendstatus_old = -1;
 
   emu_32x_startup();
 }
@@ -111,10 +139,16 @@ void p32x_reset_sh2s(void)
     sh2_set_vbr(1, vbr);
     // program will set S_OK
   }
+
+  msh2.m68krcycles_done = ssh2.m68krcycles_done = SekCyclesDoneT();
 }
 
 void Pico32xInit(void)
 {
+  if (msh2.mult_m68k_to_sh2 == 0 || msh2.mult_sh2_to_m68k == 0)
+    Pico32xSetClocks(PICO_MSH2_HZ, 0);
+  if (ssh2.mult_m68k_to_sh2 == 0 || ssh2.mult_sh2_to_m68k == 0)
+    Pico32xSetClocks(0, PICO_MSH2_HZ);
 }
 
 void PicoPower32x(void)
@@ -141,13 +175,43 @@ void PicoReset32x(void)
 {
   if (PicoAHW & PAHW_32X) {
     Pico32x.sh2irqs |= P32XI_VRES;
-    p32x_update_irls();
-    p32x_poll_event(3, 0);
+    p32x_update_irls(NULL, SekCyclesDoneT2());
+    p32x_sh2_poll_event(&msh2, SH2_IDLE_STATES, 0);
+    p32x_sh2_poll_event(&ssh2, SH2_IDLE_STATES, 0);
+    p32x_pwm_ctl_changed();
+    p32x_timers_recalc();
   }
 }
 
 static void p32x_start_blank(void)
 {
+  if (Pico32xDrawMode != PDM32X_OFF && !PicoSkipFrame) {
+    int offs, lines;
+
+    pprof_start(draw);
+
+    offs = 8; lines = 224;
+    if ((Pico.video.reg[1] & 8) && !(PicoOpt & POPT_ALT_RENDERER)) {
+      offs = 0;
+      lines = 240;
+    }
+
+    // XXX: no proper handling of 32col mode..
+    if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0 && // 32x not blanking
+        (Pico.video.reg[12] & 1) && // 40col mode
+        (PicoDrawMask & PDRAW_32X_ON))
+    {
+      int md_bg = Pico.video.reg[7] & 0x3f;
+
+      // we draw full layer (not line-by-line)
+      PicoDraw32xLayer(offs, lines, md_bg);
+    }
+    else if (Pico32xDrawMode != PDM32X_32X_ONLY)
+      PicoDraw32xLayerMdOnly(offs, lines);
+
+    pprof_end(draw);
+  }
+
   // enter vblank
   Pico32x.vdp_regs[0x0a/2] |= P32XV_VBLK|P32XV_PEN;
 
@@ -159,97 +223,307 @@ static void p32x_start_blank(void)
   }
 
   Pico32x.sh2irqs |= P32XI_VINT;
-  p32x_update_irls();
-  p32x_poll_event(3, 1);
+  p32x_update_irls(NULL, SekCyclesDoneT2());
+  p32x_sh2_poll_event(&msh2, SH2_STATE_VPOLL, 0);
+  p32x_sh2_poll_event(&ssh2, SH2_STATE_VPOLL, 0);
+}
+
+// compare cycles, handling overflows
+// check if a > b
+#define CYCLES_GT(a, b) \
+  ((int)((a) - (b)) > 0)
+// check if a >= b
+#define CYCLES_GE(a, b) \
+  ((int)((a) - (b)) >= 0)
+
+/* events */
+static void fillend_event(unsigned int now)
+{
+  Pico32x.vdp_regs[0x0a/2] &= ~P32XV_nFEN;
+  p32x_sh2_poll_event(&msh2, SH2_STATE_VPOLL, now);
+  p32x_sh2_poll_event(&ssh2, SH2_STATE_VPOLL, now);
+}
+
+typedef void (event_cb)(unsigned int now);
+
+unsigned int event_times[P32X_EVENT_COUNT];
+static unsigned int event_time_next;
+static event_cb *event_cbs[] = {
+  [P32X_EVENT_PWM]      = p32x_pwm_irq_event,
+  [P32X_EVENT_FILLEND]  = fillend_event,
+};
+
+// schedule event at some time 'after', in m68k clocks
+void p32x_event_schedule(unsigned int now, enum p32x_event event, int after)
+{
+  unsigned int when;
+
+  when = (now + after) | 1;
+
+  elprintf(EL_32X, "new event #%u %u->%u", event, now, when);
+  event_times[event] = when;
+
+  if (event_time_next == 0 || CYCLES_GT(event_time_next, when))
+    event_time_next = when;
 }
 
-static __inline void run_m68k(int cyc)
+void p32x_event_schedule_sh2(SH2 *sh2, enum p32x_event event, int after)
 {
-  pprof_start(m68k);
+  unsigned int now = sh2_cycles_done_m68k(sh2);
+  int left_to_next;
 
-#if defined(EMU_C68K)
-  PicoCpuCM68k.cycles = cyc;
-  CycloneRun(&PicoCpuCM68k);
-  SekCycleCnt += cyc - PicoCpuCM68k.cycles;
-#elif defined(EMU_M68K)
-  SekCycleCnt += m68k_execute(cyc);
-#elif defined(EMU_F68K)
-  SekCycleCnt += fm68k_emulate(cyc+1, 0, 0);
-#endif
+  p32x_event_schedule(now, event, after);
 
-  pprof_end(m68k);
+  left_to_next = (event_time_next - now) * 3;
+  sh2_end_run(sh2, left_to_next);
 }
 
-// ~1463.8, but due to cache misses and slow mem
-// it's much lower than that
-//#define SH2_LINE_CYCLES 735
-#define CYCLES_M68K2SH2(x) ((x) * 6 / 4)
+static void run_events(unsigned int until)
+{
+  int oldest, oldest_diff, time;
+  int i, diff;
+
+  while (1) {
+    oldest = -1, oldest_diff = 0x7fffffff;
+
+    for (i = 0; i < P32X_EVENT_COUNT; i++) {
+      if (event_times[i]) {
+        diff = event_times[i] - until;
+        if (diff < oldest_diff) {
+          oldest_diff = diff;
+          oldest = i;
+        }
+      }
+    }
 
-#define PICO_32X
-#define CPUS_RUN_SIMPLE(m68k_cycles,s68k_cycles) \
-{ \
-  int slice; \
-  SekCycleAim += m68k_cycles; \
-  while (SekCycleCnt < SekCycleAim) { \
-    slice = SekCycleCnt; \
-    run_m68k(SekCycleAim - SekCycleCnt); \
-    if (!(Pico32x.regs[0] & P32XS_nRES)) \
-      continue; /* SH2s reseting */ \
-    slice = SekCycleCnt - slice; /* real count from 68k */ \
-    if (SekCycleCnt < SekCycleAim) \
-      elprintf(EL_32X, "slice %d", slice); \
-    if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) { \
-      pprof_start(ssh2); \
-      sh2_execute(&ssh2, CYCLES_M68K2SH2(slice)); \
-      pprof_end(ssh2); \
-    } \
-    if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) { \
-      pprof_start(msh2); \
-      sh2_execute(&msh2, CYCLES_M68K2SH2(slice)); \
-      pprof_end(msh2); \
-    } \
-    pprof_start(dummy); \
-    pprof_end(dummy); \
-  } \
+    if (oldest_diff <= 0) {
+      time = event_times[oldest];
+      event_times[oldest] = 0;
+      elprintf(EL_32X, "run event #%d %u", oldest, time);
+      event_cbs[oldest](time);
+    }
+    else if (oldest_diff < 0x7fffffff) {
+      event_time_next = event_times[oldest];
+      break;
+    }
+    else {
+      event_time_next = 0;
+      break;
+    }
+  }
+
+  if (oldest != -1)
+    elprintf(EL_32X, "next event #%d at %u", oldest, event_time_next);
+}
+
+static inline void run_sh2(SH2 *sh2, int m68k_cycles)
+{
+  int cycles, done;
+
+  pevt_log_sh2_o(sh2, EVT_RUN_START);
+  sh2->state |= SH2_STATE_RUN;
+  cycles = C_M68K_TO_SH2(*sh2, m68k_cycles);
+  elprintf(EL_32X, "%csh2 +run %u %d",
+    sh2->is_slave?'s':'m', sh2->m68krcycles_done, cycles);
+
+  done = sh2_execute(sh2, cycles);
+
+  sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, done);
+  sh2->state &= ~SH2_STATE_RUN;
+  pevt_log_sh2_o(sh2, EVT_RUN_END);
+  elprintf(EL_32X, "%csh2 -run %u %d",
+    sh2->is_slave?'s':'m', sh2->m68krcycles_done, done);
+}
+
+// sync other sh2 to this one
+// note: recursive call
+void p32x_sync_other_sh2(SH2 *sh2, unsigned int m68k_target)
+{
+  SH2 *osh2 = sh2->other_sh2;
+  int left_to_event;
+  int m68k_cycles;
+
+  if (osh2->state & SH2_STATE_RUN)
+    return;
+
+  m68k_cycles = m68k_target - osh2->m68krcycles_done;
+  if (m68k_cycles < 200)
+    return;
+
+  if (osh2->state & SH2_IDLE_STATES) {
+    osh2->m68krcycles_done = m68k_target;
+    return;
+  }
+
+  elprintf(EL_32X, "%csh2 sync to %u %d",
+    osh2->is_slave?'s':'m', m68k_target, m68k_cycles);
+
+  run_sh2(osh2, m68k_cycles);
+
+  // there might be new event to schedule current sh2 to
+  if (event_time_next) {
+    left_to_event = event_time_next - m68k_target;
+    left_to_event *= 3;
+    if (sh2_cycles_left(sh2) > left_to_event) {
+      if (left_to_event < 1)
+        left_to_event = 1;
+      sh2_end_run(sh2, left_to_event);
+    }
+  }
+}
+
+#define sync_sh2s_normal p32x_sync_sh2s
+//#define sync_sh2s_lockstep p32x_sync_sh2s
+
+/* most timing is in 68k clock */
+void sync_sh2s_normal(unsigned int m68k_target)
+{
+  unsigned int now, target, timer_cycles;
+  int cycles;
+
+  elprintf(EL_32X, "sh2 sync to %u", m68k_target);
+
+  if (!(Pico32x.regs[0] & P32XS_nRES)) {
+    msh2.m68krcycles_done = ssh2.m68krcycles_done = m68k_target;
+    return; // rare
+  }
+
+  now = msh2.m68krcycles_done;
+  if (CYCLES_GT(now, ssh2.m68krcycles_done))
+    now = ssh2.m68krcycles_done;
+  timer_cycles = now;
+
+  while (CYCLES_GT(m68k_target, now))
+  {
+    if (event_time_next && CYCLES_GE(now, event_time_next))
+      run_events(now);
+
+    target = m68k_target;
+    if (event_time_next && CYCLES_GT(target, event_time_next))
+      target = event_time_next;
+
+    while (CYCLES_GT(target, now))
+    {
+      elprintf(EL_32X, "sh2 exec to %u %d,%d/%d, flags %x", target,
+        target - msh2.m68krcycles_done, target - ssh2.m68krcycles_done,
+        m68k_target - now, Pico32x.emu_flags);
+
+      if (!(ssh2.state & SH2_IDLE_STATES)) {
+        cycles = target - ssh2.m68krcycles_done;
+        if (cycles > 0) {
+          run_sh2(&ssh2, cycles);
+
+          if (event_time_next && CYCLES_GT(target, event_time_next))
+            target = event_time_next;
+        }
+      }
+
+      if (!(msh2.state & SH2_IDLE_STATES)) {
+        cycles = target - msh2.m68krcycles_done;
+        if (cycles > 0) {
+          run_sh2(&msh2, cycles);
+
+          if (event_time_next && CYCLES_GT(target, event_time_next))
+            target = event_time_next;
+        }
+      }
+
+      now = target;
+      if (!(msh2.state & SH2_IDLE_STATES)) {
+        if (CYCLES_GT(now, msh2.m68krcycles_done))
+          now = msh2.m68krcycles_done;
+      }
+      if (!(ssh2.state & SH2_IDLE_STATES)) {
+        if (CYCLES_GT(now, ssh2.m68krcycles_done))
+          now = ssh2.m68krcycles_done;
+      }
+    }
+
+    p32x_timers_do(now - timer_cycles);
+    timer_cycles = now;
+  }
+
+  // advance idle CPUs
+  if (msh2.state & SH2_IDLE_STATES) {
+    if (CYCLES_GT(m68k_target, msh2.m68krcycles_done))
+      msh2.m68krcycles_done = m68k_target;
+  }
+  if (ssh2.state & SH2_IDLE_STATES) {
+    if (CYCLES_GT(m68k_target, ssh2.m68krcycles_done))
+      ssh2.m68krcycles_done = m68k_target;
+  }
 }
 
 #define STEP_68K 24
-#define CPUS_RUN_LOCKSTEP(m68k_cycles,s68k_cycles) \
-{ \
-  int i; \
-  for (i = 0; i <= (m68k_cycles) - STEP_68K; i += STEP_68K) { \
-    run_m68k(STEP_68K); \
-    if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) \
-      sh2_execute(&msh2, CYCLES_M68K2SH2(STEP_68K)); \
-    if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) \
-      sh2_execute(&ssh2, CYCLES_M68K2SH2(STEP_68K)); \
-  } \
-  /* last step */ \
-  i = (m68k_cycles) - i; \
-  run_m68k(i); \
-  if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) \
-    sh2_execute(&msh2, CYCLES_M68K2SH2(i)); \
-  if (!(Pico32x.emu_flags & (P32XF_SSH2POLL|P32XF_SSH2VPOLL))) \
-    sh2_execute(&ssh2, CYCLES_M68K2SH2(i)); \
-}
-
-#define CPUS_RUN CPUS_RUN_SIMPLE
-//#define CPUS_RUN CPUS_RUN_LOCKSTEP
 
+void sync_sh2s_lockstep(unsigned int m68k_target)
+{
+  unsigned int mcycles;
+  
+  mcycles = msh2.m68krcycles_done;
+  if (ssh2.m68krcycles_done < mcycles)
+    mcycles = ssh2.m68krcycles_done;
+
+  while (mcycles < m68k_target) {
+    mcycles += STEP_68K;
+    sync_sh2s_normal(mcycles);
+  }
+}
+
+#define CPUS_RUN(m68k_cycles,s68k_cycles) do { \
+  SekRunM68k(m68k_cycles); \
+  if (Pico32x.emu_flags & (P32XF_68KCPOLL|P32XF_68KVPOLL)) \
+    p32x_sync_sh2s(SekCyclesDoneT2()); \
+} while (0)
+
+#define PICO_32X
 #include "../pico_cmn.c"
 
 void PicoFrame32x(void)
 {
-  pwm_frame_smp_cnt = 0;
-
   Pico32x.vdp_regs[0x0a/2] &= ~P32XV_VBLK; // get out of vblank
   if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0) // no forced blanking
     Pico32x.vdp_regs[0x0a/2] &= ~P32XV_PEN; // no palette access
 
-  p32x_poll_event(3, 1);
+  p32x_sh2_poll_event(&msh2, SH2_STATE_VPOLL, 0);
+  p32x_sh2_poll_event(&ssh2, SH2_STATE_VPOLL, 0);
 
   PicoFrameStart();
   PicoFrameHints();
-  elprintf(EL_32X, "poll: %02x", Pico32x.emu_flags);
+  sh2_drc_frame();
+
+  elprintf(EL_32X, "poll: %02x %02x %02x",
+    Pico32x.emu_flags & 3, msh2.state, ssh2.state);
+}
+
+// calculate multipliers against 68k clock (7670442)
+// normally * 3, but effectively slower due to high latencies everywhere
+// however using something lower breaks MK2 animations
+void Pico32xSetClocks(int msh2_hz, int ssh2_hz)
+{
+  float m68k_clk = (float)(OSC_NTSC / 7);
+  if (msh2_hz > 0) {
+    msh2.mult_m68k_to_sh2 = (int)((float)msh2_hz * (1 << CYCLE_MULT_SHIFT) / m68k_clk);
+    msh2.mult_sh2_to_m68k = (int)(m68k_clk * (1 << CYCLE_MULT_SHIFT) / (float)msh2_hz);
+  }
+  if (ssh2_hz > 0) {
+    ssh2.mult_m68k_to_sh2 = (int)((float)ssh2_hz * (1 << CYCLE_MULT_SHIFT) / m68k_clk);
+    ssh2.mult_sh2_to_m68k = (int)(m68k_clk * (1 << CYCLE_MULT_SHIFT) / (float)ssh2_hz);
+  }
+}
+
+void Pico32xStateLoaded(int is_early)
+{
+  if (is_early) {
+    Pico32xMemStateLoaded();
+    return;
+  }
+
+  SekCycleCnt = 0;
+  sh2s[0].m68krcycles_done = sh2s[1].m68krcycles_done = SekCycleCntT;
+  p32x_update_irls(NULL, SekCycleCntT);
+  p32x_pwm_state_loaded();
+  run_events(SekCycleCntT);
 }
 
+// vim:shiftwidth=2:ts=2:expandtab