sram handling refactored
[picodrive.git] / Pico / Area.c
CommitLineData
cc68a136 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 "PicoInt.h"\r
11\r
12// ym2612\r
13#include "sound/ym2612.h"\r
14\r
15// sn76496\r
16extern int *sn76496_regs;\r
17\r
18\r
19struct PicoArea { void *data; int len; char *name; };\r
20\r
21// strange observation on Symbian OS 9.1, m600 organizer fw r3a06:\r
22// taking an address of fread or fwrite causes "application could't be started" error\r
23// on startup randomly depending on binary layout of executable file.\r
24\r
860c6322 25arearw *areaRead = (arearw *) 0; // fread; // read and write function pointers for\r
26arearw *areaWrite = (arearw *) 0; // fwrite; // gzip save state ability\r
27areaeof *areaEof = (areaeof *) 0;\r
28areaseek *areaSeek = (areaseek *) 0;\r
29areaclose *areaClose = (areaclose *) 0;\r
cc68a136 30\r
31\r
32// Scan one variable and callback\r
33static int ScanVar(void *data,int len,char *name,void *PmovFile,int PmovAction)\r
34{\r
35 int ret = 0;\r
36 if ((PmovAction&3)==1) ret = areaWrite(data,1,len,PmovFile);\r
37 if ((PmovAction&3)==2) ret = areaRead (data,1,len,PmovFile);\r
38 return (ret != len);\r
39}\r
40\r
41#define SCAN_VAR(x,y) ScanVar(&x,sizeof(x),y,PmovFile,PmovAction);\r
42#define SCANP(x) ScanVar(&Pico.x,sizeof(Pico.x),#x,PmovFile,PmovAction);\r
43\r
44// Pack the cpu into a common format:\r
eff55556 45PICO_INTERNAL int PicoAreaPackCpu(unsigned char *cpu, int is_sub)\r
cc68a136 46{\r
47 unsigned int pc=0;\r
48\r
49#ifdef EMU_A68K\r
50 memcpy(cpu,M68000_regs.d,0x40);\r
51 pc=M68000_regs.pc;\r
52 *(unsigned char *)(cpu+0x44)=(unsigned char)M68000_regs.ccr;\r
53 *(unsigned char *)(cpu+0x45)=(unsigned char)M68000_regs.srh;\r
54 *(unsigned int *)(cpu+0x48)=M68000_regs.isp;\r
a4030801 55 cpu[0x4c] = M68000_regs.irq;\r
56 // stop flag?\r
cc68a136 57#endif\r
58\r
59#ifdef EMU_C68K\r
51a902ae 60 struct Cyclone *context = is_sub ? &PicoCpuS68k : &PicoCpu;\r
61 memcpy(cpu,context->d,0x40);\r
62 pc=context->pc-context->membase;\r
63 *(unsigned int *)(cpu+0x44)=CycloneGetSr(context);\r
64 *(unsigned int *)(cpu+0x48)=context->osp;\r
a4030801 65 cpu[0x4c] = context->irq;\r
0af33fe0 66 cpu[0x4d] = context->state_flags & 1;\r
cc68a136 67#endif\r
68\r
69#ifdef EMU_M68K\r
83bd0b76 70 void *oldcontext = m68ki_cpu_p;\r
71 m68k_set_context(is_sub ? &PicoS68kCPU : &PicoM68kCPU);\r
72 memcpy(cpu,m68ki_cpu_p->dar,0x40);\r
73 pc=m68ki_cpu_p->pc;\r
cc68a136 74 *(unsigned int *)(cpu+0x44)=m68k_get_reg(NULL, M68K_REG_SR);\r
83bd0b76 75 *(unsigned int *)(cpu+0x48)=m68ki_cpu_p->sp[0];\r
a4030801 76 cpu[0x4c] = CPU_INT_LEVEL>>8;\r
77 cpu[0x4d] = CPU_STOPPED;\r
83bd0b76 78 m68k_set_context(oldcontext);\r
cc68a136 79#endif\r
80\r
81 *(unsigned int *)(cpu+0x40)=pc;\r
82 return 0;\r
83}\r
84\r
eff55556 85PICO_INTERNAL int PicoAreaUnpackCpu(unsigned char *cpu, int is_sub)\r
cc68a136 86{\r
cc68a136 87#ifdef EMU_A68K\r
88 memcpy(M68000_regs.d,cpu,0x40);\r
89 M68000_regs.pc=pc;\r
90 M68000_regs.ccr=*(unsigned char *)(cpu+0x44);\r
91 M68000_regs.srh=*(unsigned char *)(cpu+0x45);\r
92 M68000_regs.isp=*(unsigned int *)(cpu+0x48);\r
a4030801 93 M68000_regs.irq = cpu[0x4c];\r
94 // stop flag?\r
cc68a136 95#endif\r
96\r
97#ifdef EMU_C68K\r
51a902ae 98 struct Cyclone *context = is_sub ? &PicoCpuS68k : &PicoCpu;\r
99 CycloneSetSr(context, *(unsigned int *)(cpu+0x44));\r
100 context->osp=*(unsigned int *)(cpu+0x48);\r
101 memcpy(context->d,cpu,0x40);\r
102 context->membase=0;\r
103 context->pc = context->checkpc(*(unsigned int *)(cpu+0x40)); // Base pc\r
a4030801 104 context->irq = cpu[0x4c];\r
0af33fe0 105 context->state_flags = 0;\r
106 if (cpu[0x4d])\r
107 context->state_flags |= 1;\r
cc68a136 108#endif\r
109\r
110#ifdef EMU_M68K\r
83bd0b76 111 void *oldcontext = m68ki_cpu_p;\r
112 m68k_set_context(is_sub ? &PicoS68kCPU : &PicoM68kCPU);\r
113 memcpy(m68ki_cpu_p->dar,cpu,0x40);\r
114 m68ki_cpu_p->pc=*(unsigned int *)(cpu+0x40);\r
cc68a136 115 m68k_set_reg(M68K_REG_SR, *(unsigned int *)(cpu+0x44));\r
83bd0b76 116 m68ki_cpu_p->sp[0]=*(unsigned int *)(cpu+0x48);\r
a4030801 117 CPU_INT_LEVEL = cpu[0x4c] << 8;\r
118 CPU_STOPPED = cpu[0x4d];\r
83bd0b76 119 m68k_set_context(oldcontext);\r
cc68a136 120#endif\r
121 return 0;\r
122}\r
123\r
124// Scan the contents of the virtual machine's memory for saving or loading\r
125static int PicoAreaScan(int PmovAction,unsigned int ver, void *PmovFile)\r
126{\r
127 void *ym2612_regs;\r
128 unsigned char cpu[0x60];\r
129 unsigned char cpu_z80[0x60];\r
130 int ret;\r
131\r
132 memset(&cpu,0,sizeof(cpu));\r
133 memset(&cpu_z80,0,sizeof(cpu_z80));\r
134\r
135 ym2612_regs = YM2612GetRegs();\r
136\r
137 if (PmovAction&4)\r
138 {\r
139 Pico.m.scanline=0;\r
140\r
51a902ae 141 // Scan all the memory areas:\r
cc68a136 142 SCANP(ram) SCANP(vram) SCANP(zram) SCANP(cram) SCANP(vsram)\r
143\r
144 // Pack, scan and unpack the cpu data:\r
51a902ae 145 if((PmovAction&3)==1) PicoAreaPackCpu(cpu, 0);\r
cc68a136 146 //SekInit(); // notaz: do we really have to do this here?\r
147 //PicoMemInit();\r
148 SCAN_VAR(cpu,"cpu")\r
51a902ae 149 if((PmovAction&3)==2) PicoAreaUnpackCpu(cpu, 0);\r
cc68a136 150\r
151 SCAN_VAR(Pico.m ,"misc")\r
152 SCAN_VAR(Pico.video,"video")\r
153\r
51a902ae 154 // notaz: save/load z80, YM2612, sn76496 states instead of Pico.s (which is unused anyway)\r
155 if(PicoOpt&7) {\r
156 if((PmovAction&3)==1) z80_pack(cpu_z80);\r
cc68a136 157 ret = SCAN_VAR(cpu_z80,"cpu_z80")\r
51a902ae 158 // do not unpack if we fail to load z80 state\r
159 if((PmovAction&3)==2) {\r
cc68a136 160 if(ret) z80_reset();\r
161 else z80_unpack(cpu_z80);\r
162 }\r
51a902ae 163 }\r
164 if(PicoOpt&3)\r
cc68a136 165 ScanVar(sn76496_regs,28*4,"SN76496state", PmovFile, PmovAction); // regs and other stuff\r
51a902ae 166 if(PicoOpt&1) {\r
cc68a136 167 ScanVar(ym2612_regs, 0x200+4, "YM2612state", PmovFile, PmovAction); // regs + addr line\r
51a902ae 168 if((PmovAction&3)==2) YM2612PicoStateLoad(); // reload YM2612 state from it's regs\r
169 }\r
cc68a136 170 }\r
171\r
172 return 0;\r
173}\r
174\r
175// ---------------------------------------------------------------------------\r
176// Helper code to save/load to a file handle\r
177\r
178// Save or load the state from PmovFile:\r
179int PmovState(int PmovAction, void *PmovFile)\r
180{\r
181 int minimum=0;\r
182 unsigned char head[32];\r
183\r
75736070 184 if (PicoMCD & 1)\r
51a902ae 185 {\r
186 if (PmovAction&1) return PicoCdSaveState(PmovFile);\r
187 if (PmovAction&2) return PicoCdLoadState(PmovFile);\r
188 }\r
189\r
cc68a136 190 memset(head,0,sizeof(head));\r
191\r
192 // Find out minimal compatible version:\r
193 //PicoAreaScan(PmovAction&0xc,&minimum);\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 (PmovAction&1) areaWrite(head,1,sizeof(head),PmovFile);\r
202 if (PmovAction&2) areaRead (head,1,sizeof(head),PmovFile);\r
203\r
204 // Scan memory areas:\r
205 PicoAreaScan(PmovAction, *(unsigned int *)(head+0x8), PmovFile);\r
206\r
207 return 0;\r
208}\r
209\r