| 1 | // This is part of Pico Library\r |
| 2 | \r |
| 3 | // (c) Copyright 2004 Dave, All rights reserved.\r |
| 4 | // (c) Copyright 2006 notaz, All rights reserved.\r |
| 5 | // Free for non-commercial use.\r |
| 6 | \r |
| 7 | // For commercial use, separate licencing terms must be obtained.\r |
| 8 | \r |
| 9 | \r |
| 10 | #include "pico_int.h"\r |
| 11 | #include <zlib/zlib.h>\r |
| 12 | \r |
| 13 | // ym2612\r |
| 14 | #include "sound/ym2612.h"\r |
| 15 | \r |
| 16 | // sn76496\r |
| 17 | extern int *sn76496_regs;\r |
| 18 | \r |
| 19 | \r |
| 20 | struct PicoArea { void *data; int len; char *name; };\r |
| 21 | \r |
| 22 | // strange observation on Symbian OS 9.1, m600 organizer fw r3a06:\r |
| 23 | // taking an address of fread or fwrite causes "application could't be started" error\r |
| 24 | // on startup randomly depending on binary layout of executable file.\r |
| 25 | \r |
| 26 | arearw *areaRead = (arearw *) 0; // fread; // read and write function pointers for\r |
| 27 | arearw *areaWrite = (arearw *) 0; // fwrite; // gzip save state ability\r |
| 28 | areaeof *areaEof = (areaeof *) 0;\r |
| 29 | areaseek *areaSeek = (areaseek *) 0;\r |
| 30 | areaclose *areaClose = (areaclose *) 0;\r |
| 31 | \r |
| 32 | void (*PicoLoadStateHook)(void) = NULL;\r |
| 33 | \r |
| 34 | \r |
| 35 | // Scan one variable and callback\r |
| 36 | static int ScanVar(void *data,int len,char *name,void *PmovFile,int is_write)\r |
| 37 | {\r |
| 38 | int ret = 0;\r |
| 39 | if (is_write)\r |
| 40 | ret = areaWrite(data,1,len,PmovFile);\r |
| 41 | else\r |
| 42 | ret = areaRead (data,1,len,PmovFile);\r |
| 43 | return (ret != len);\r |
| 44 | }\r |
| 45 | \r |
| 46 | #define SCAN_VAR(x,y) ScanVar(&x,sizeof(x),y,PmovFile,is_write);\r |
| 47 | #define SCANP(x) ScanVar(&Pico.x,sizeof(Pico.x),#x,PmovFile,is_write);\r |
| 48 | \r |
| 49 | // Pack the cpu into a common format:\r |
| 50 | PICO_INTERNAL void PicoAreaPackCpu(unsigned char *cpu, int is_sub)\r |
| 51 | {\r |
| 52 | unsigned int pc=0;\r |
| 53 | \r |
| 54 | #if defined(EMU_C68K)\r |
| 55 | struct Cyclone *context = is_sub ? &PicoCpuCS68k : &PicoCpuCM68k;\r |
| 56 | memcpy(cpu,context->d,0x40);\r |
| 57 | pc=context->pc-context->membase;\r |
| 58 | *(unsigned int *)(cpu+0x44)=CycloneGetSr(context);\r |
| 59 | *(unsigned int *)(cpu+0x48)=context->osp;\r |
| 60 | cpu[0x4c] = context->irq;\r |
| 61 | cpu[0x4d] = context->state_flags & 1;\r |
| 62 | #elif defined(EMU_M68K)\r |
| 63 | void *oldcontext = m68ki_cpu_p;\r |
| 64 | m68k_set_context(is_sub ? &PicoCpuMS68k : &PicoCpuMM68k);\r |
| 65 | memcpy(cpu,m68ki_cpu_p->dar,0x40);\r |
| 66 | pc=m68ki_cpu_p->pc;\r |
| 67 | *(unsigned int *)(cpu+0x44)=m68k_get_reg(NULL, M68K_REG_SR);\r |
| 68 | *(unsigned int *)(cpu+0x48)=m68ki_cpu_p->sp[m68ki_cpu_p->s_flag^SFLAG_SET];\r |
| 69 | cpu[0x4c] = CPU_INT_LEVEL>>8;\r |
| 70 | cpu[0x4d] = CPU_STOPPED;\r |
| 71 | m68k_set_context(oldcontext);\r |
| 72 | #elif defined(EMU_F68K)\r |
| 73 | M68K_CONTEXT *context = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;\r |
| 74 | memcpy(cpu,context->dreg,0x40);\r |
| 75 | pc=context->pc;\r |
| 76 | *(unsigned int *)(cpu+0x44)=context->sr;\r |
| 77 | *(unsigned int *)(cpu+0x48)=context->asp;\r |
| 78 | cpu[0x4c] = context->interrupts[0];\r |
| 79 | cpu[0x4d] = (context->execinfo & FM68K_HALTED) ? 1 : 0;\r |
| 80 | #endif\r |
| 81 | \r |
| 82 | *(unsigned int *)(cpu+0x40)=pc;\r |
| 83 | }\r |
| 84 | \r |
| 85 | PICO_INTERNAL void PicoAreaUnpackCpu(unsigned char *cpu, int is_sub)\r |
| 86 | {\r |
| 87 | #if defined(EMU_C68K)\r |
| 88 | struct Cyclone *context = is_sub ? &PicoCpuCS68k : &PicoCpuCM68k;\r |
| 89 | CycloneSetSr(context, *(unsigned int *)(cpu+0x44));\r |
| 90 | context->osp=*(unsigned int *)(cpu+0x48);\r |
| 91 | memcpy(context->d,cpu,0x40);\r |
| 92 | context->membase=0;\r |
| 93 | context->pc = context->checkpc(*(unsigned int *)(cpu+0x40)); // Base pc\r |
| 94 | context->irq = cpu[0x4c];\r |
| 95 | context->state_flags = 0;\r |
| 96 | if (cpu[0x4d])\r |
| 97 | context->state_flags |= 1;\r |
| 98 | #elif defined(EMU_M68K)\r |
| 99 | void *oldcontext = m68ki_cpu_p;\r |
| 100 | m68k_set_context(is_sub ? &PicoCpuMS68k : &PicoCpuMM68k);\r |
| 101 | m68k_set_reg(M68K_REG_SR, *(unsigned int *)(cpu+0x44));\r |
| 102 | memcpy(m68ki_cpu_p->dar,cpu,0x40);\r |
| 103 | m68ki_cpu_p->pc=*(unsigned int *)(cpu+0x40);\r |
| 104 | m68ki_cpu_p->sp[m68ki_cpu_p->s_flag^SFLAG_SET]=*(unsigned int *)(cpu+0x48);\r |
| 105 | CPU_INT_LEVEL = cpu[0x4c] << 8;\r |
| 106 | CPU_STOPPED = cpu[0x4d];\r |
| 107 | m68k_set_context(oldcontext);\r |
| 108 | #elif defined(EMU_F68K)\r |
| 109 | M68K_CONTEXT *context = is_sub ? &PicoCpuFS68k : &PicoCpuFM68k;\r |
| 110 | memcpy(context->dreg,cpu,0x40);\r |
| 111 | context->pc =*(unsigned int *)(cpu+0x40);\r |
| 112 | context->sr =*(unsigned int *)(cpu+0x44);\r |
| 113 | context->asp=*(unsigned int *)(cpu+0x48);\r |
| 114 | context->interrupts[0] = cpu[0x4c];\r |
| 115 | context->execinfo &= ~FM68K_HALTED;\r |
| 116 | if (cpu[0x4d]&1) context->execinfo |= FM68K_HALTED;\r |
| 117 | #endif\r |
| 118 | }\r |
| 119 | \r |
| 120 | // Scan the contents of the virtual machine's memory for saving or loading\r |
| 121 | static int PicoAreaScan(int is_write, unsigned int ver, void *PmovFile)\r |
| 122 | {\r |
| 123 | void *ym2612_regs;\r |
| 124 | unsigned char cpu[0x60];\r |
| 125 | unsigned char cpu_z80[0x60];\r |
| 126 | int ret;\r |
| 127 | \r |
| 128 | memset(&cpu,0,sizeof(cpu));\r |
| 129 | memset(&cpu_z80,0,sizeof(cpu_z80));\r |
| 130 | Pico.m.scanline=0;\r |
| 131 | \r |
| 132 | ym2612_regs = YM2612GetRegs();\r |
| 133 | \r |
| 134 | // Scan all the memory areas:\r |
| 135 | SCANP(ram) SCANP(vram) SCANP(zram) SCANP(cram) SCANP(vsram)\r |
| 136 | \r |
| 137 | // Pack, scan and unpack the cpu data:\r |
| 138 | if (is_write)\r |
| 139 | PicoAreaPackCpu(cpu, 0);\r |
| 140 | SCAN_VAR(cpu,"cpu")\r |
| 141 | if (!is_write)\r |
| 142 | PicoAreaUnpackCpu(cpu, 0);\r |
| 143 | \r |
| 144 | SCAN_VAR(Pico.m ,"misc")\r |
| 145 | SCAN_VAR(Pico.video,"video")\r |
| 146 | \r |
| 147 | // no longer keeping eeprom data in sram_reg\r |
| 148 | if (!is_write && (Pico.m.sram_reg & 4))\r |
| 149 | Pico.m.sram_reg = SRR_MAPPED;\r |
| 150 | \r |
| 151 | if (is_write)\r |
| 152 | z80_pack(cpu_z80);\r |
| 153 | ret = SCAN_VAR(cpu_z80,"cpu_z80")\r |
| 154 | // do not unpack if we fail to load z80 state\r |
| 155 | if (!is_write) {\r |
| 156 | if (ret) z80_reset();\r |
| 157 | else z80_unpack(cpu_z80);\r |
| 158 | }\r |
| 159 | \r |
| 160 | ScanVar(sn76496_regs, 28*4, "SN76496state", PmovFile, is_write);\r |
| 161 | if (is_write)\r |
| 162 | ym2612_pack_state();\r |
| 163 | ret = ScanVar(ym2612_regs, 0x200+4, "YM2612state", PmovFile, is_write); // regs + addr line\r |
| 164 | if (!is_write && !ret)\r |
| 165 | ym2612_unpack_state();\r |
| 166 | \r |
| 167 | return 0;\r |
| 168 | }\r |
| 169 | \r |
| 170 | // ---------------------------------------------------------------------------\r |
| 171 | // Helper code to save/load to a file handle\r |
| 172 | \r |
| 173 | // XXX: error checking\r |
| 174 | // Save or load the state from PmovFile:\r |
| 175 | static int PmovState(int is_write, void *PmovFile)\r |
| 176 | {\r |
| 177 | int minimum=0;\r |
| 178 | unsigned char head[32];\r |
| 179 | \r |
| 180 | if ((PicoAHW & PAHW_MCD) || carthw_chunks != NULL)\r |
| 181 | {\r |
| 182 | if (is_write)\r |
| 183 | return PicoCdSaveState(PmovFile);\r |
| 184 | else {\r |
| 185 | int ret = PicoCdLoadState(PmovFile);\r |
| 186 | if (PicoLoadStateHook) PicoLoadStateHook();\r |
| 187 | return ret;\r |
| 188 | }\r |
| 189 | }\r |
| 190 | \r |
| 191 | memset(head,0,sizeof(head));\r |
| 192 | \r |
| 193 | // Find out minimal compatible version:\r |
| 194 | minimum = 0x0021;\r |
| 195 | \r |
| 196 | memcpy(head,"Pico",4);\r |
| 197 | *(unsigned int *)(head+0x8)=PicoVer;\r |
| 198 | *(unsigned int *)(head+0xc)=minimum;\r |
| 199 | \r |
| 200 | // Scan header:\r |
| 201 | if (is_write)\r |
| 202 | areaWrite(head,1,sizeof(head),PmovFile);\r |
| 203 | else\r |
| 204 | areaRead (head,1,sizeof(head),PmovFile);\r |
| 205 | \r |
| 206 | // Scan memory areas:\r |
| 207 | PicoAreaScan(is_write, *(unsigned int *)(head+0x8), PmovFile);\r |
| 208 | \r |
| 209 | if (!is_write && PicoLoadStateHook)\r |
| 210 | PicoLoadStateHook();\r |
| 211 | \r |
| 212 | return 0;\r |
| 213 | }\r |
| 214 | \r |
| 215 | static size_t gzRead2(void *p, size_t _size, size_t _n, void *file)\r |
| 216 | {\r |
| 217 | return gzread(file, p, _n);\r |
| 218 | }\r |
| 219 | \r |
| 220 | static size_t gzWrite2(void *p, size_t _size, size_t _n, void *file)\r |
| 221 | {\r |
| 222 | return gzwrite(file, p, _n);\r |
| 223 | }\r |
| 224 | \r |
| 225 | static void set_cbs(int gz)\r |
| 226 | {\r |
| 227 | if (gz) {\r |
| 228 | areaRead = gzRead2;\r |
| 229 | areaWrite = gzWrite2;\r |
| 230 | areaEof = (areaeof *) gzeof;\r |
| 231 | areaSeek = (areaseek *) gzseek;\r |
| 232 | areaClose = (areaclose *) gzclose;\r |
| 233 | } else {\r |
| 234 | areaRead = (arearw *) fread;\r |
| 235 | areaWrite = (arearw *) fwrite;\r |
| 236 | areaEof = (areaeof *) feof;\r |
| 237 | areaSeek = (areaseek *) fseek;\r |
| 238 | areaClose = (areaclose *) fclose;\r |
| 239 | }\r |
| 240 | }\r |
| 241 | \r |
| 242 | int PicoState(const char *fname, int is_save)\r |
| 243 | {\r |
| 244 | void *afile = NULL;\r |
| 245 | int ret;\r |
| 246 | \r |
| 247 | if (strcmp(fname + strlen(fname) - 3, ".gz") == 0)\r |
| 248 | {\r |
| 249 | if ( (afile = gzopen(fname, is_save ? "wb" : "rb")) ) {\r |
| 250 | set_cbs(1);\r |
| 251 | if (is_save)\r |
| 252 | gzsetparams(afile, 9, Z_DEFAULT_STRATEGY);\r |
| 253 | }\r |
| 254 | }\r |
| 255 | else\r |
| 256 | {\r |
| 257 | if ( (afile = fopen(fname, is_save ? "wb" : "rb")) ) {\r |
| 258 | set_cbs(0);\r |
| 259 | }\r |
| 260 | }\r |
| 261 | \r |
| 262 | if (afile == NULL)\r |
| 263 | return -1;\r |
| 264 | \r |
| 265 | ret = PmovState(is_save, afile);\r |
| 266 | areaClose(afile);\r |
| 267 | if (!is_save)\r |
| 268 | Pico.m.dirtyPal=1;\r |
| 269 | \r |
| 270 | return ret;\r |
| 271 | }\r |
| 272 | \r |
| 273 | int PicoStateLoadVDP(const char *fname)\r |
| 274 | {\r |
| 275 | void *afile = NULL;\r |
| 276 | if (strcmp(fname + strlen(fname) - 3, ".gz") == 0)\r |
| 277 | {\r |
| 278 | if ( (afile = gzopen(fname, "rb")) )\r |
| 279 | set_cbs(1);\r |
| 280 | }\r |
| 281 | else\r |
| 282 | {\r |
| 283 | if ( (afile = fopen(fname, "rb")) )\r |
| 284 | set_cbs(0);\r |
| 285 | }\r |
| 286 | if (afile == NULL)\r |
| 287 | return -1;\r |
| 288 | \r |
| 289 | if ((PicoAHW & PAHW_MCD) || carthw_chunks != NULL) {\r |
| 290 | PicoCdLoadStateGfx(afile);\r |
| 291 | } else {\r |
| 292 | areaSeek(afile, 0x10020, SEEK_SET); // skip header and RAM in state file\r |
| 293 | areaRead(Pico.vram, 1, sizeof(Pico.vram), afile);\r |
| 294 | areaSeek(afile, 0x2000, SEEK_CUR);\r |
| 295 | areaRead(Pico.cram, 1, sizeof(Pico.cram), afile);\r |
| 296 | areaRead(Pico.vsram, 1, sizeof(Pico.vsram), afile);\r |
| 297 | areaSeek(afile, 0x221a0, SEEK_SET);\r |
| 298 | areaRead(&Pico.video, 1, sizeof(Pico.video), afile);\r |
| 299 | }\r |
| 300 | areaClose(afile);\r |
| 301 | return 0;\r |
| 302 | }\r |
| 303 | \r |