1.10 release

[picodrive.git] / Pico / Area.c

// This is part of Pico Library\r
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// (c) Copyright 2004 Dave, All rights reserved.\r
// (c) Copyright 2006 notaz, All rights reserved.\r
// Free for non-commercial use.\r
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// For commercial use, separate licencing terms must be obtained.\r
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#include "PicoInt.h"\r
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// ym2612\r
#include "sound/ym2612.h"\r
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// sn76496\r
extern int *sn76496_regs;\r
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struct PicoArea { void *data; int len; char *name; };\r
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// strange observation on Symbian OS 9.1, m600 organizer fw r3a06:\r
// taking an address of fread or fwrite causes "application could't be started" error\r
// on startup randomly depending on binary layout of executable file.\r
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arearw *areaRead  = (arearw *) 0; // fread;  // read and write function pointers for\r
arearw *areaWrite = (arearw *) 0; // fwrite; // gzip save state ability\r
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// Scan one variable and callback\r
static int ScanVar(void *data,int len,char *name,void *PmovFile,int PmovAction)\r
{\r
  int ret = 0;\r
  if ((PmovAction&3)==1) ret = areaWrite(data,1,len,PmovFile);\r
  if ((PmovAction&3)==2) ret = areaRead (data,1,len,PmovFile);\r
  return (ret != len);\r
}\r
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#define SCAN_VAR(x,y) ScanVar(&x,sizeof(x),y,PmovFile,PmovAction);\r
#define SCANP(x)      ScanVar(&Pico.x,sizeof(Pico.x),#x,PmovFile,PmovAction);\r
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// Pack the cpu into a common format:\r
static int PackCpu(unsigned char *cpu)\r
{\r
  unsigned int pc=0;\r
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#ifdef EMU_A68K\r
  memcpy(cpu,M68000_regs.d,0x40);\r
  pc=M68000_regs.pc;\r
  *(unsigned char *)(cpu+0x44)=(unsigned char)M68000_regs.ccr;\r
  *(unsigned char *)(cpu+0x45)=(unsigned char)M68000_regs.srh;\r
  *(unsigned int  *)(cpu+0x48)=M68000_regs.isp;\r
#endif\r
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#ifdef EMU_C68K\r
  memcpy(cpu,PicoCpu.d,0x40);\r
  pc=PicoCpu.pc-PicoCpu.membase;\r
  *(unsigned int *)(cpu+0x44)=CycloneGetSr(&PicoCpu);\r
  *(unsigned int *)(cpu+0x48)=PicoCpu.osp;\r
#endif\r
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#ifdef EMU_M68K\r
  memcpy(cpu,m68ki_cpu.dar,0x40);\r
  pc=m68ki_cpu.pc;\r
  *(unsigned int  *)(cpu+0x44)=m68k_get_reg(NULL, M68K_REG_SR);\r
  *(unsigned int  *)(cpu+0x48)=m68ki_cpu.sp[0];\r
#endif\r
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  *(unsigned int *)(cpu+0x40)=pc;\r
  return 0;\r
}\r
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static int UnpackCpu(unsigned char *cpu)\r
{\r
  unsigned int pc=0;\r
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  pc=*(unsigned int *)(cpu+0x40);\r
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#ifdef EMU_A68K\r
  memcpy(M68000_regs.d,cpu,0x40);\r
  M68000_regs.pc=pc;\r
  M68000_regs.ccr=*(unsigned char *)(cpu+0x44);\r
  M68000_regs.srh=*(unsigned char *)(cpu+0x45);\r
  M68000_regs.isp=*(unsigned int  *)(cpu+0x48);\r
#endif\r
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#ifdef EMU_C68K\r
  CycloneSetSr(&PicoCpu, *(unsigned int  *)(cpu+0x44));\r
  PicoCpu.osp=*(unsigned int  *)(cpu+0x48);\r
  memcpy(PicoCpu.d,cpu,0x40);\r
  PicoCpu.membase=0;\r
  PicoCpu.pc =PicoCpu.checkpc(pc); // Base pc\r
#endif\r
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#ifdef EMU_M68K\r
  memcpy(m68ki_cpu.dar,cpu,0x40);\r
  m68ki_cpu.pc=pc;\r
  m68k_set_reg(M68K_REG_SR, *(unsigned int *)(cpu+0x44));\r
  m68ki_cpu.sp[0]=*(unsigned int *)(cpu+0x48);\r
#endif\r
  return 0;\r
}\r
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// Scan the contents of the virtual machine's memory for saving or loading\r
static int PicoAreaScan(int PmovAction,unsigned int ver, void *PmovFile)\r
{\r
  void *ym2612_regs;\r
  unsigned char cpu[0x60];\r
  unsigned char cpu_z80[0x60];\r
  int ret;\r
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  memset(&cpu,0,sizeof(cpu));\r
  memset(&cpu_z80,0,sizeof(cpu_z80));\r
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  ym2612_regs = YM2612GetRegs();\r
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  if (PmovAction&4)\r
  {\r
    Pico.m.scanline=0;\r
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	// Scan all the memory areas:\r
    SCANP(ram) SCANP(vram) SCANP(zram) SCANP(cram) SCANP(vsram)\r
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    // Pack, scan and unpack the cpu data:\r
    if((PmovAction&3)==1) PackCpu(cpu);\r
    //SekInit();     // notaz: do we really have to do this here?\r
    //PicoMemInit();\r
    SCAN_VAR(cpu,"cpu")\r
    if((PmovAction&3)==2) UnpackCpu(cpu);\r
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    SCAN_VAR(Pico.m    ,"misc")\r
    SCAN_VAR(Pico.video,"video")\r
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	if(ver == 0x0030) { // zram was being saved incorrectly in 0x0030 (byteswaped?)\r
	  Byteswap(Pico.zram, 0x2000);\r
	  return 0; // do not try to load sound stuff\r
    }\r
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	//SCAN_VAR(Pico.s    ,"sound")\r
	// notaz: save/load z80, YM2612, sn76496 states instead of Pico.s (which is unused anyway)\r
	if(PicoOpt&7) {\r
	  if((PmovAction&3)==1) z80_pack(cpu_z80);\r
      ret = SCAN_VAR(cpu_z80,"cpu_z80")\r
	  // do not unpack if we fail to load z80 state\r
	  if((PmovAction&3)==2) {\r
        if(ret) z80_reset();\r
        else    z80_unpack(cpu_z80);\r
      }\r
	}\r
	if(PicoOpt&3)\r
      ScanVar(sn76496_regs,28*4,"SN76496state", PmovFile, PmovAction); // regs and other stuff\r
	if(PicoOpt&1) {\r
      ScanVar(ym2612_regs, 0x200+4, "YM2612state", PmovFile, PmovAction); // regs + addr line\r
	  if((PmovAction&3)==2) YM2612PicoStateLoad(); // reload YM2612 state from it's regs\r
	}\r
  }\r
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  return 0;\r
}\r
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// ---------------------------------------------------------------------------\r
// Helper code to save/load to a file handle\r
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// Save or load the state from PmovFile:\r
int PmovState(int PmovAction, void *PmovFile)\r
{\r
  int minimum=0;\r
  unsigned char head[32];\r
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  memset(head,0,sizeof(head));\r
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  // Find out minimal compatible version:\r
  //PicoAreaScan(PmovAction&0xc,&minimum);\r
  minimum = 0x0021;\r
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  memcpy(head,"Pico",4);\r
  *(unsigned int *)(head+0x8)=PicoVer;\r
  *(unsigned int *)(head+0xc)=minimum;\r
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  // Scan header:\r
  if (PmovAction&1) areaWrite(head,1,sizeof(head),PmovFile);\r
  if (PmovAction&2) areaRead (head,1,sizeof(head),PmovFile);\r
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  // Scan memory areas:\r
  PicoAreaScan(PmovAction, *(unsigned int *)(head+0x8), PmovFile);\r
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  return 0;\r
}\r
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