32x: sh2 irqs (irls), preliminary DMAC implementation

[picodrive.git] / pico / 32x / 32x.c

diff --git a/pico/32x/32x.c b/pico/32x/32x.c
index 8e3553a..ee561ae 100644 (file)
--- a/pico/32x/32x.c
+++ b/pico/32x/32x.c
@@ -3,6 +3,35 @@
 
 struct Pico32x Pico32x;
 
+static void sh2_irq_cb(int level)
+{
+  // diagnostic for now
+  elprintf(EL_32X, "sh2 ack %d @ %08x", level, ash2_pc());
+}
+
+void p32x_update_irls(void)
+{
+  int irqs, mlvl = 0, slvl = 0;
+
+  // msh2
+  irqs = (Pico32x.sh2irqs | Pico32x.sh2irqi[0]) & ((Pico32x.sh2irq_mask[0] << 3) | P32XI_VRES);
+  while ((irqs >>= 1))
+    mlvl++;
+  mlvl *= 2;
+
+  // ssh2
+  irqs = (Pico32x.sh2irqs | Pico32x.sh2irqi[1]) & ((Pico32x.sh2irq_mask[1] << 3) | P32XI_VRES);
+  while ((irqs >>= 1))
+    slvl++;
+  slvl *= 2;
+
+  elprintf(EL_32X, "update_irls: m %d, s %d", mlvl, slvl);
+  sh2_irl_irq(&msh2, mlvl);
+  if (mlvl)
+    p32x_poll_event(0);
+  sh2_irl_irq(&ssh2, slvl);
+}
+
 void Pico32xStartup(void)
 {
   elprintf(EL_STATUS|EL_32X, "32X startup");
@@ -11,9 +40,11 @@ void Pico32xStartup(void)
   PicoMemSetup32x();
 
   sh2_init(&msh2);
+  msh2.irq_callback = sh2_irq_cb;
   sh2_reset(&msh2);
 
   sh2_init(&ssh2);
+  ssh2.irq_callback = sh2_irq_cb;
   sh2_reset(&ssh2);
 
   if (!Pico.m.pal)
@@ -54,20 +85,27 @@ static void p32x_start_blank(void)
   // enter vblank
   Pico32x.vdp_regs[0x0a/2] |= P32XV_VBLK|P32XV_PEN;
 
-  // swap waits until vblank
+  // FB swap waits until vblank
   if ((Pico32x.vdp_regs[0x0a/2] ^ Pico32x.pending_fb) & P32XV_FS) {
     Pico32x.vdp_regs[0x0a/2] &= ~P32XV_FS;
     Pico32x.vdp_regs[0x0a/2] |= Pico32x.pending_fb;
     Pico32xSwapDRAM(Pico32x.pending_fb ^ 1);
   }
+
+  p32x_poll_event(1);
 }
 
 // FIXME..
 static __inline void SekRunM68k(int cyc)
 {
   int cyc_do;
-  SekCycleAim+=cyc;
-  if ((cyc_do=SekCycleAim-SekCycleCnt) <= 0) return;
+  SekCycleAim += cyc;
+  if (Pico32x.emu_flags & P32XF_68KPOLL) {
+    SekCycleCnt = SekCycleAim;
+    return;
+  }
+  if ((cyc_do = SekCycleAim - SekCycleCnt) <= 0)
+    return;
 #if defined(EMU_CORE_DEBUG)
   // this means we do run-compare
   SekCycleCnt+=CM_compareRun(cyc_do, 0);
@@ -88,16 +126,27 @@ static __inline void SekRunM68k(int cyc)
 
 #define PICO_32X
 #define RUN_SH2S \
-  if (!(Pico32x.emu_flags & P32XF_MSH2POLL)) \
+  if (!(Pico32x.emu_flags & (P32XF_MSH2POLL|P32XF_MSH2VPOLL))) \
     sh2_execute(&msh2, SH2_LINE_CYCLES);
 
 #include "../pico_cmn.c"
 
 void PicoFrame32x(void)
 {
+  Pico32x.vdp_regs[0x0a/2] &= ~P32XV_VBLK; // get out of vblank
   if ((Pico32x.vdp_regs[0] & 3 ) != 0) // no forced blanking
-    Pico32x.vdp_regs[0x0a/2] &= ~(P32XV_VBLK|P32XV_PEN); // get out of vblank
+    Pico32x.vdp_regs[0x0a/2] &= ~P32XV_PEN; // no pal access
+
+  p32x_poll_event(1);
 
   PicoFrameStart();
   PicoFrameHints();
+
+  // hack
+  if (Pico.m.frame_count == 83) {
+    Pico32xMem->sdram[0x3610 ^ 1] = 'R';
+    Pico32xMem->sdram[0x3611 ^ 1] = 'E';
+    Pico32xMem->sdram[0x3612 ^ 1] = 'D';
+    Pico32xMem->sdram[0x3613 ^ 1] = 'Y';
+  }
 }