32x: sh2 wip, main SH2 BIOS passes

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@782 be3aeb3a-fb24-0410-a615-afba39da0efa

pico/32x/32x.c

@@ -10,6 +10,12 @@ void Pico32xStartup(void)
   PicoAHW |= PAHW_32X;
   PicoMemSetup32x();
 
+  sh2_init(&msh2);
+  sh2_reset(&msh2);
+
+  sh2_init(&ssh2);
+  sh2_reset(&ssh2);
+
   if (!Pico.m.pal)
     Pico32x.vdp_regs[0] |= P32XV_nPAL;
 
@@ -77,6 +83,9 @@ static __inline void SekRunM68k(int cyc)
 }
 
 #define PICO_32X
+#define RUN_SH2S \
+  sh2_execute(&msh2, 1000);
+
 #include "../pico_cmn.c"
 
 void PicoFrame32x(void)

pico/32x/memory.c

@@ -7,7 +7,12 @@ struct Pico32xMem *Pico32xMem;
 
 static void bank_switch(int b);
 
+#define MSB8(x) ((x) >> 8)
+
 // SH2 faking
+#define FAKE_SH2
+int p32x_csum_faked;
+#ifdef FAKE_SH2
 static const u16 comm_fakevals[] = {
   0x4d5f, 0x4f4b, // M_OK
   0x535f, 0x4f4b, // S_OK
@@ -17,55 +22,78 @@ static const u16 comm_fakevals[] = {
   0x5333, 0x4d33,
   0x0000, 0x0000, // eq for doom
   0x0002, // Mortal Kombat
-  0, // pad
+//  0, // pad
 };
-int p32x_csum_faked;
+
+static u32 sh2_comm_faker(u32 a)
+{
+  static int f = 0;
+  if (a == 0x28 && !p32x_csum_faked) {
+    p32x_csum_faked = 1;
+    return *(unsigned short *)(Pico.rom + 0x18e);
+  }
+  if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0]))
+    f = 0;
+  return comm_fakevals[f++];
+}
+#endif
 
 static u32 p32x_reg_read16(u32 a)
 {
   a &= 0x3e;
 
-  // SH2 faker
+#ifdef FAKE_SH2
   if ((a & 0x30) == 0x20)
-  {
+    return sh2_comm_faker(a);
-    static int f = 0;
+#endif
-    if (a == 0x28 && !p32x_csum_faked) {
-      p32x_csum_faked = 1;
-      return *(unsigned short *)(Pico.rom + 0x18e);
-    }
-    if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0]))
-      f = 0;
-    return comm_fakevals[f++];
-  }
 
   return Pico32x.regs[a / 2];
 }
 
 static void p32x_reg_write8(u32 a, u32 d)
 {
+  u16 *r = Pico32x.regs;
   a &= 0x3f;
 
-  if (a == 1 && !(Pico32x.regs[0] & 1)) {
+  if (a == 1 && !(r[0] & 1)) {
-    Pico32x.regs[0] |= 1;
+    r[0] |= 1;
     Pico32xStartup();
     return;
   }
 
-  if (!(Pico32x.regs[0] & 1))
+  if (!(r[0] & 1))
     return;
 
-  if (a == 5) {
+  switch (a) {
-    d &= 7;
+    case 0:
-    if (Pico32x.regs[4/2] != d) {
+      r[0] = (r[0] & 0x83) | ((d << 8) & P32XS_FM);
-      Pico32x.regs[4/2] = d;
+      break;
-      bank_switch(d);
+    case 5:
-      return;
+      d &= 7;
-    }
+      if (r[4/2] != d) {
+        r[4/2] = d;
+        bank_switch(d);
+      }
+      break;
   }
 }
 
 static void p32x_reg_write16(u32 a, u32 d)
 {
+  u16 *r = Pico32x.regs;
+  a &= 0x3e;
+
+  switch (a) {
+    case 0:
+      r[0] = (r[0] & 0x83) | (d & P32XS_FM);
+      return;
+  }
+
+  if ((a & 0x30) == 0x20) {
+    r[a / 2] = d;
+    return;
+  }
+
   p32x_reg_write8(a + 1, d);
 }
 
@@ -113,6 +141,33 @@ static void p32x_vdp_write16(u32 a, u32 d)
   p32x_vdp_write8(a | 1, d);
 }
 
+// SH2 regs
+static u32 p32x_sh2reg_read16(u32 a)
+{
+  a &= 0xff; // ?
+  if (a == 0) {
+    return (Pico32x.regs[0] & P32XS_FM) | P32XS2_ADEN;
+  }
+
+  return 0;
+}
+
+static void p32x_sh2reg_write8(u32 a, u32 d)
+{
+}
+
+static void p32x_sh2reg_write16(u32 a, u32 d)
+{
+  a &= 0xff;
+
+  if ((a & 0x30) == 0x20) {
+    Pico32x.regs[a/2] = d;
+    return;
+  }
+
+  p32x_sh2reg_write8(a | 1, d);
+}
+
 // default 32x handlers
 u32 PicoRead8_32x(u32 a)
 {
@@ -298,6 +353,152 @@ static void bank_switch(int b)
   elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank);
 }
 
+// -----------------------------------------------------------------
+//                              SH2  
+// -----------------------------------------------------------------
+
+u32 pico32x_read8(u32 a)
+{
+  u32 d = 0;
+  if (a < sizeof(Pico32xMem->sh2_rom_m))
+    return Pico32xMem->sh2_rom_m[a ^ 1];
+
+  if ((a & 0x0ffc0000) == 0x06000000)
+    return Pico32xMem->sdram[(a & 0x3ffff) ^ 1];
+
+  if ((a & 0x0fc00000) == 0x02000000)
+    if ((a & 0x003fffff) < Pico.romsize)
+      return Pico.rom[(a & 0x3fffff) ^ 1];
+
+  if ((a & 0x0fffff00) == 0x4000) {
+    d = p32x_sh2reg_read16(a);
+    goto out_16to8;
+  }
+
+  if ((a & 0x0fffff00) == 0x4100) {
+    d = p32x_vdp_read16(a);
+    goto out_16to8;
+  }
+
+  if ((a & 0x0fffff00) == 0x4200) {
+    d = Pico32xMem->pal[(a & 0x1ff) / 2];
+    goto out_16to8;
+  }
+
+  elprintf(EL_UIO, "sh2 unmapped r8  [%08x]       %02x @%06x", a, d, ash2_pc());
+  return d;
+
+out_16to8:
+  if (a & 1)
+    d &= 0xff;
+  else
+    d >>= 8;
+
+  elprintf(EL_32X, "sh2 r8  [%08x]       %02x @%06x", a, d, ash2_pc());
+  return d;
+}
+
+u32 pico32x_read16(u32 a)
+{
+  u32 d = 0;
+  if (a < sizeof(Pico32xMem->sh2_rom_m))
+    return *(u16 *)(Pico32xMem->sh2_rom_m + a);
+
+  if ((a & 0x0ffc0000) == 0x06000000)
+    return ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2];
+
+  if ((a & 0x0fc00000) == 0x02000000)
+    if ((a & 0x003fffff) < Pico.romsize)
+      return ((u16 *)Pico.rom)[(a & 0x3fffff) / 2];
+
+  if ((a & 0x0fffff00) == 0x4000) {
+    d = p32x_sh2reg_read16(a);
+    goto out;
+  }
+
+  if ((a & 0x0fffff00) == 0x4100) {
+    d = p32x_vdp_read16(a);
+    goto out;
+  }
+
+  if ((a & 0x0fffff00) == 0x4200) {
+    d = Pico32xMem->pal[(a & 0x1ff) / 2];
+    goto out;
+  }
+
+  elprintf(EL_UIO, "sh2 unmapped r16 [%08x]     %04x @%06x", a, d, ash2_pc());
+  return d;
+
+out:
+  elprintf(EL_32X, "sh2 r16 [%08x]     %04x @%06x", a, d, ash2_pc());
+  return d;
+}
+
+u32 pico32x_read32(u32 a)
+{
+//  elprintf(EL_UIO, "sh2 r32 [%08x] %08x @%06x", a, d, ash2_pc());
+  return (pico32x_read16(a) << 16) | pico32x_read16(a + 2);
+}
+
+void pico32x_write8(u32 a, u32 d)
+{
+  if ((a & 0x0ffffc00) == 0x4000)
+    elprintf(EL_32X, "sh2 w8  [%08x]       %02x @%06x", a, d & 0xff, ash2_pc());
+
+  if ((a & 0x0ffc0000) == 0x06000000) {
+    Pico32xMem->sdram[(a & 0x3ffff) ^ 1] = d;
+    return;
+  }
+
+  if ((a & 0x0fffff00) == 0x4100) {
+    p32x_vdp_write8(a, d);
+    return;
+  }
+
+  if ((a & 0x0fffff00) == 0x4000) {
+    p32x_sh2reg_write8(a, d);
+    return;
+  }
+
+  elprintf(EL_UIO, "sh2 unmapped w8  [%08x]       %02x @%06x", a, d & 0xff, ash2_pc());
+}
+
+void pico32x_write16(u32 a, u32 d)
+{
+  if ((a & 0x0ffffc00) == 0x4000)
+    elprintf(EL_32X, "sh2 w16 [%08x]     %04x @%06x", a, d & 0xffff, ash2_pc());
+
+  if ((a & 0x0ffc0000) == 0x06000000) {
+    ((u16 *)Pico32xMem->sdram)[(a & 0x3ffff) / 2] = d;
+    return;
+  }
+
+  if ((a & 0x0fffff00) == 0x4100) {
+    p32x_vdp_write16(a, d);
+    return;
+  }
+
+  if ((a & 0x0ffffe00) == 0x4200) {
+    Pico32xMem->pal[(a & 0x1ff) / 2] = d;
+    Pico32x.dirty_pal = 1;
+    return;
+  }
+
+  if ((a & 0x0fffff00) == 0x4000) {
+    p32x_sh2reg_write16(a, d);
+    return;
+  }
+
+  elprintf(EL_UIO, "sh2 unmapped w16 [%08x]     %04x @%06x", a, d & 0xffff, ash2_pc());
+}
+
+void pico32x_write32(u32 a, u32 d)
+{
+//  elprintf(EL_UIO, "sh2 w32 [%08x] %08x @%06x", a, d, ash2_pc());
+  pico32x_write16(a, d >> 16);
+  pico32x_write16(a + 2, d);
+}
+
 #define HWSWAP(x) (((x) << 16) | ((x) >> 16))
 void PicoMemSetup32x(void)
 {
@@ -333,6 +534,24 @@ void PicoMemSetup32x(void)
   // fill remaining mem with ROM
   memcpy(Pico32xMem->m68k_rom + 0x100, Pico.rom + 0x100, sizeof(Pico32xMem->m68k_rom) - 0x100);
 
+  // 32X ROM
+  // TODO: move
+  {
+    FILE *f = fopen("32X_M_BIOS.BIN", "rb");
+    int i;
+    if (f == NULL) {
+      printf("missing BIOS\n");
+      exit(1);
+    }
+    fread(Pico32xMem->sh2_rom_m, 1, sizeof(Pico32xMem->sh2_rom_m), f);
+    fclose(f);
+    for (i = 0; i < sizeof(Pico32xMem->sh2_rom_m); i += 2) {
+      int t = Pico32xMem->sh2_rom_m[i];
+      Pico32xMem->sh2_rom_m[i] = Pico32xMem->sh2_rom_m[i + 1];
+      Pico32xMem->sh2_rom_m[i + 1] = t;
+    }
+  }
+
   // cartridge area becomes unmapped
   // XXX: we take the easy way and don't unmap ROM,
   // so that we can avoid handling the RV bit.

pico/pico_cmn.c

@@ -1,5 +1,5 @@
 // common code for Pico.c and cd/Pico.c
-// (c) Copyright 2007,2008 Grazvydas "notaz" Ignotas
+// (c) Copyright 2007-2009 Grazvydas "notaz" Ignotas
 
 #define CYCLES_M68K_LINE     488 // suitable for both PAL/NTSC
 #define CYCLES_M68K_VINT_LAG  68
@@ -15,9 +15,16 @@
   }
 
 // CPUS_RUN
+#ifndef RUN_SH2S
+#define RUN_SH2S
+#endif
+
 #ifndef PICO_CD
 #define CPUS_RUN(m68k_cycles,s68k_cycles) \
-    SekRunM68k(m68k_cycles);
+{ \
+    SekRunM68k(m68k_cycles); \
+    RUN_SH2S \
+}
 #else
 #define CPUS_RUN(m68k_cycles,s68k_cycles) \
 { \

pico/pico_int.h

@@ -226,6 +226,13 @@ extern unsigned long z80_write_map[0x10000 >> Z80_MEM_SHIFT];
 typedef unsigned char (z80_read_f)(unsigned short a);
 typedef void (z80_write_f)(unsigned int a, unsigned char data);
 
+// ----------------------- SH2 CPU -----------------------
+
+#include "cpu/sh2mame/sh2.h"
+
+SH2 msh2, ssh2;
+#define ash2_pc() msh2.ppc
+
 // ---------------------------------------------------------
 
 // main oscillator clock which controls timing
@@ -389,15 +396,18 @@ typedef struct
 #define Pico_mcd ((mcd_state *)Pico.rom)
 
 // 32X
-#define P32XV_nPAL (1<<15)
+#define P32XS_FM    (1<<15)
-#define P32XV_PRI  (1<< 7)
+#define P32XS2_ADEN (1<< 9)
-#define P32XV_Mx   (3<< 0)
 
-#define P32XV_VBLK (1<<15)
+#define P32XV_nPAL  (1<<15)
-#define P32XV_HBLK (1<<14)
+#define P32XV_PRI   (1<< 7)
-#define P32XV_PEN  (1<<13)
+#define P32XV_Mx    (3<< 0)
-#define P32XV_nFEN (1<< 1)
+
-#define P32XV_FS   (1<< 0)
+#define P32XV_VBLK  (1<<15)
+#define P32XV_HBLK  (1<<14)
+#define P32XV_PEN   (1<<13)
+#define P32XV_nFEN  (1<< 1)
+#define P32XV_FS    (1<< 0)
 
 struct Pico32x
 {
@@ -413,6 +423,8 @@ struct Pico32xMem
   unsigned char  sdram[0x40000];
   unsigned short dram[2][0x20000/2]; // AKA fb
   unsigned char  m68k_rom[0x10000]; // 0x100; using M68K_BANK_SIZE
+  unsigned char  sh2_rom_m[0x800];
+  unsigned char  sh2_rom_s[0x400];
   unsigned short pal[0x100];
   unsigned short pal_native[0x100]; // converted to native (for renderer)
 };

platform/linux/Makefile

@@ -71,6 +71,8 @@ else
 DEFINES += _USE_CZ80
 OBJS += cpu/cz80/cz80.o
 endif
+# sh2
+OBJS += cpu/sh2mame/sh2pico.o
 # misc
 ifeq "$(use_fame)" "1"
 ifeq "$(use_musashi)" "1"
@@ -83,7 +85,7 @@ CFLAGS += $(addprefix -D,$(DEFINES))
 vpath %.c = ../..
 
 DIRS = platform platform/gp2x platform/common pico pico/cd pico/pico pico/sound pico/carthw/svp \
-	pico/32x zlib unzip cpu cpu/musashi cpu/fame cpu/mz80 cpu/cz80
+	pico/32x zlib unzip cpu cpu/musashi cpu/fame cpu/mz80 cpu/cz80 cpu/sh2mame
 
 all: mkdirs PicoDrive
 clean: tidy