Mercurial > vba-linux

     1 #ifndef VBA_GBAINLINE_H

     2 #define VBA_GBAINLINE_H

     3 

     4 #if _MSC_VER > 1000

     5 #pragma once

     6 #endif // _MSC_VER > 1000

     7 

     8 #include "../Port.h"

     9 #include "../common/System.h"

    10 #include "../common/vbalua.h"

    11 #include "GBAGlobals.h"

    12 #include "EEprom.h"

    13 #include "Flash.h"

    14 #include "RTC.h"

    15 

    16 extern bool8 cpuSramEnabled;

    17 extern bool8 cpuFlashEnabled;

    18 extern bool8 cpuEEPROMEnabled;

    19 extern bool8 cpuEEPROMSensorEnabled;

    20 

    21 #define CPUReadByteQuick(addr) \

    22     map[(addr)>>24].address[(addr) & map[(addr)>>24].mask]

    23 

    24 #define CPUReadHalfWordQuick(addr) \

    25     READ16LE(((u16 *)&map[(addr)>>24].address[(addr) & map[(addr)>>24].mask]))

    26 

    27 #define CPUReadMemoryQuick(addr) \

    28     READ32LE(((u32 *)&map[(addr)>>24].address[(addr) & map[(addr)>>24].mask]))

    29 

    30 //inline u32 CPUReadMemoryQuick(u32 addr)

    31 //{

    32 //	u32 addrShift = (addr)>>24;

    33 //	u32 rt = (addr) & map[addrShift].mask;

    34 //	return READ32LE(((u32*)&map[addrShift].address[rt]));

    35 //}

    36 

    37 inline u32 CPUReadMemory(u32 address)

    38 {

    39 #ifdef GBA_LOGGING

    40 	if (address & 3)

    41 	{

    42 		if (systemVerbose & VERBOSE_UNALIGNED_MEMORY)

    43 		{

    44 			log("Unaligned word read: %08x at %08x\n", address, armMode ?

    45 			    armNextPC - 4 : armNextPC - 2);

    46 		}

    47 	}

    48 #endif

    49 

    50 	u32 value;

    51 	switch (address >> 24)

    52 	{

    53 	case 0:

    54 		if (reg[15].I >> 24)

    55 		{

    56 			if (address < 0x4000)

    57 			{

    58 #ifdef GBA_LOGGING

    59 				if (systemVerbose & VERBOSE_ILLEGAL_READ)

    60 				{

    61 					log("Illegal word read: %08x at %08x\n", address, armMode ?

    62 					    armNextPC - 4 : armNextPC - 2);

    63 				}

    64 #endif

    65 

    66 				value = READ32LE(((u32 *)&biosProtected));

    67 			}

    68 			else

    69 				goto unreadable;

    70 		}

    71 		else

    72 			value = READ32LE(((u32 *)&bios[address & 0x3FFC]));

    73 		break;

    74 	case 2:

    75 		value = READ32LE(((u32 *)&workRAM[address & 0x3FFFC]));

    76 		break;

    77 	case 3:

    78 		value = READ32LE(((u32 *)&internalRAM[address & 0x7ffC]));

    79 		break;

    80 	case 4:

    81 		if ((address < 0x4000400) && ioReadable[address & 0x3fc])

    82 		{

    83 			if (ioReadable[(address & 0x3fc) + 2])

    84 			{

    85 				if (address >= 0x400012d && address <= 0x4000131)

    86 					GBASystemCounters.lagged = false;

    87 				value = READ32LE(((u32 *)&ioMem[address & 0x3fC]));

    88 			}

    89 			else

    90 			{

    91 				if (address >= 0x400012f && address <= 0x4000131)

    92 					GBASystemCounters.lagged = false;

    93 				value = READ16LE(((u16 *)&ioMem[address & 0x3fc]));

    94 			}

    95 		}

    96 		else

    97 			goto unreadable;

    98 		break;

    99 	case 5:

   100 		value = READ32LE(((u32 *)&paletteRAM[address & 0x3fC]));

   101 		break;

   102 	case 6:

   103 		value = READ32LE(((u32 *)&vram[address & 0x1fffc]));

   104 		break;

   105 	case 7:

   106 		value = READ32LE(((u32 *)&oam[address & 0x3FC]));

   107 		break;

   108 	case 8:

   109 	case 9:

   110 	case 10:

   111 	case 11:

   112 	case 12:

   113 		value = READ32LE(((u32 *)&rom[address&0x1FFFFFC]));

   114 		break;

   115 	case 13:

   116 		if (cpuEEPROMEnabled)

   117 			// no need to swap this

   118 			return eepromRead(address);

   119 		goto unreadable;

   120 	case 14:

   121 		if (cpuFlashEnabled | cpuSramEnabled)

   122 			// no need to swap this

   123 			return flashRead(address);

   124 	// default

   125 	default:

   126 unreadable:

   127 #ifdef GBA_LOGGING

   128 		if (systemVerbose & VERBOSE_ILLEGAL_READ)

   129 		{

   130 			log("Illegal word read: %08x at %08x\n", address, armMode ?

   131 			    armNextPC - 4 : armNextPC - 2);

   132 		}

   133 #endif

   134 

   135 		//    if(ioMem[0x205] & 0x40) {

   136 		if (armState)

   137 		{

   138 			value = CPUReadMemoryQuick(reg[15].I);

   139 		}

   140 		else

   141 		{

   142 			value = CPUReadHalfWordQuick(reg[15].I) |

   143 			        CPUReadHalfWordQuick(reg[15].I) << 16;

   144 		}

   145 		//  } else {

   146 		//      value = *((u32 *)&bios[address & 0x3ffc]);

   147 		//    }

   148 		//        return 0xFFFFFFFF;

   149 	}

   150 

   151 	if (address & 3)

   152 	{

   153 #ifdef C_CORE

   154 		int shift = (address & 3) << 3;

   155 		value = (value >> shift) | (value << (32 - shift));

   156 #else

   157 #ifdef __GNUC__

   158 		asm ("and $3, %%ecx;"

   159 		     "shl $3 ,%%ecx;"

   160 		     "ror %%cl, %0"

   161 			 : "=r" (value)

   162 			 : "r" (value), "c" (address));

   163 #else

   164 		__asm {

   165 			mov ecx, address;

   166 			and ecx, 3;

   167 			shl ecx, 3;

   168 			ror [dword ptr value], cl;

   169 		}

   170 #endif

   171 #endif

   172 	}

   173 	return value;

   174 }

   175 

   176 extern u32 myROM[];

   177 

   178 inline u32 CPUReadHalfWord(u32 address)

   179 {

   180 #ifdef GBA_LOGGING

   181 	if (address & 1)

   182 	{

   183 		if (systemVerbose & VERBOSE_UNALIGNED_MEMORY)

   184 		{

   185 			log("Unaligned halfword read: %08x at %08x\n", address, armMode ?

   186 			    armNextPC - 4 : armNextPC - 2);

   187 		}

   188 	}

   189 #endif

   190 

   191 	u32 value;

   192 

   193 	switch (address >> 24)

   194 	{

   195 	case 0:

   196 		if (reg[15].I >> 24)

   197 		{

   198 			if (address < 0x4000)

   199 			{

   200 #ifdef GBA_LOGGING

   201 				if (systemVerbose & VERBOSE_ILLEGAL_READ)

   202 				{

   203 					log("Illegal halfword read: %08x at %08x\n", address, armMode ?

   204 					    armNextPC - 4 : armNextPC - 2);

   205 				}

   206 #endif

   207 				value = READ16LE(((u16 *)&biosProtected[address&2]));

   208 			}

   209 			else

   210 				goto unreadable;

   211 		}

   212 		else

   213 			value = READ16LE(((u16 *)&bios[address & 0x3FFE]));

   214 		break;

   215 	case 2:

   216 		value = READ16LE(((u16 *)&workRAM[address & 0x3FFFE]));

   217 		break;

   218 	case 3:

   219 		value = READ16LE(((u16 *)&internalRAM[address & 0x7ffe]));

   220 		break;

   221 	case 4:

   222 		if ((address < 0x4000400) && ioReadable[address & 0x3fe])

   223 		{

   224 			if (address >= 0x400012f && address <= 0x4000131)

   225 				GBASystemCounters.lagged = false;

   226 			value =  READ16LE(((u16 *)&ioMem[address & 0x3fe]));

   227 		}

   228 		else

   229 			goto unreadable;

   230 		break;

   231 	case 5:

   232 		value = READ16LE(((u16 *)&paletteRAM[address & 0x3fe]));

   233 		break;

   234 	case 6:

   235 		value = READ16LE(((u16 *)&vram[address & 0x1fffe]));

   236 		break;

   237 	case 7:

   238 		value = READ16LE(((u16 *)&oam[address & 0x3fe]));

   239 		break;

   240 	case 8:

   241 	case 9:

   242 	case 10:

   243 	case 11:

   244 	case 12:

   245 		if (address == 0x80000c4 || address == 0x80000c6 || address == 0x80000c8)

   246 			value = rtcRead(address);

   247 		else

   248 			value = READ16LE(((u16 *)&rom[address & 0x1FFFFFE]));

   249 		break;

   250 	case 13:

   251 		if (cpuEEPROMEnabled)

   252 			// no need to swap this

   253 			return eepromRead(address);

   254 		goto unreadable;

   255 	case 14:

   256 		if (cpuFlashEnabled | cpuSramEnabled)

   257 			// no need to swap this

   258 			return flashRead(address);

   259 	// default

   260 	default:

   261 unreadable:

   262 #ifdef GBA_LOGGING

   263 		if (systemVerbose & VERBOSE_ILLEGAL_READ)

   264 		{

   265 			log("Illegal halfword read: %08x at %08x\n", address, armMode ?

   266 			    armNextPC - 4 : armNextPC - 2);

   267 		}

   268 #endif

   269 		extern bool8 cpuDmaHack;

   270 		extern u32   cpuDmaLast;

   271 		extern int32 cpuDmaCount;

   272 		if (cpuDmaHack && cpuDmaCount)

   273 		{

   274 			value = (u16)cpuDmaLast;

   275 		}

   276 		else

   277 		{

   278 			if (armState)

   279 			{

   280 				value = CPUReadHalfWordQuick(reg[15].I + (address & 2));

   281 			}

   282 			else

   283 			{

   284 				value = CPUReadHalfWordQuick(reg[15].I);

   285 			}

   286 		}

   287 		//    return value;

   288 		//    if(address & 1)

   289 		//      value = (value >> 8) | ((value & 0xFF) << 24);

   290 		//    return 0xFFFF;

   291 		break;

   292 	}

   293 

   294 	if (address & 1)

   295 	{

   296 		value = (value >> 8) | (value << 24);

   297 	}

   298 

   299 	return value;

   300 }

   301 

   302 inline u16 CPUReadHalfWordSigned(u32 address)

   303 {

   304 	u16 value = CPUReadHalfWord(address);

   305 	if ((address & 1))

   306 		value = (s8)value;

   307 	return value;

   308 }

   309 

   310 inline u8 CPUReadByte(u32 address)

   311 {

   312 	switch (address >> 24)

   313 	{

   314 	case 0:

   315 		if (reg[15].I >> 24)

   316 		{

   317 			if (address < 0x4000)

   318 			{

   319 #ifdef GBA_LOGGING

   320 				if (systemVerbose & VERBOSE_ILLEGAL_READ)

   321 				{

   322 					log("Illegal byte read: %08x at %08x\n", address, armMode ?

   323 					    armNextPC - 4 : armNextPC - 2);

   324 				}

   325 #endif

   326 				return biosProtected[address & 3];

   327 			}

   328 			else

   329 				goto unreadable;

   330 		}

   331 		return bios[address & 0x3FFF];

   332 	case 2:

   333 		return workRAM[address & 0x3FFFF];

   334 	case 3:

   335 		return internalRAM[address & 0x7fff];

   336 	case 4:

   337 		if ((address < 0x4000400) && ioReadable[address & 0x3ff])

   338 		{

   339 			if (address == 0x4000130 || address == 0x4000131)

   340 				GBASystemCounters.lagged = false;

   341 			return ioMem[address & 0x3ff];

   342 		}

   343 		else

   344 			goto unreadable;

   345 	case 5:

   346 		return paletteRAM[address & 0x3ff];

   347 	case 6:

   348 		return vram[address & 0x1ffff];

   349 	case 7:

   350 		return oam[address & 0x3ff];

   351 	case 8:

   352 	case 9:

   353 	case 10:

   354 	case 11:

   355 	case 12:

   356 		return rom[address & 0x1FFFFFF];

   357 	case 13:

   358 		if (cpuEEPROMEnabled)

   359 			return eepromRead(address);

   360 		goto unreadable;

   361 	case 14:

   362 		if (cpuSramEnabled | cpuFlashEnabled)

   363 			return flashRead(address);

   364 		if (cpuEEPROMSensorEnabled)

   365 		{

   366 			switch (address & 0x00008f00)

   367 			{

   368 			case 0x8200:

   369 				return systemGetSensorX() & 255;

   370 			case 0x8300:

   371 				return (systemGetSensorX() >> 8)|0x80;

   372 			case 0x8400:

   373 				return systemGetSensorY() & 255;

   374 			case 0x8500:

   375 				return systemGetSensorY() >> 8;

   376 			}

   377 		}

   378 	// default

   379 	default:

   380 unreadable:

   381 #ifdef GBA_LOGGING

   382 		if (systemVerbose & VERBOSE_ILLEGAL_READ)

   383 		{

   384 			log("Illegal byte read: %08x at %08x\n", address, armMode ?

   385 			    armNextPC - 4 : armNextPC - 2);

   386 		}

   387 #endif

   388 

   389 		if (armState)

   390 		{

   391 			return CPUReadByteQuick(reg[15].I+(address & 3));

   392 		}

   393 		else

   394 		{

   395 			return CPUReadByteQuick(reg[15].I+(address & 1));

   396 		}

   397 		//    return 0xFF;

   398 		break;

   399 	}

   400 }

   401 

   402 inline void CPUWriteMemoryWrapped(u32 address, u32 value)

   403 {

   404 #ifdef GBA_LOGGING

   405 	if (address & 3)

   406 	{

   407 		if (systemVerbose & VERBOSE_UNALIGNED_MEMORY)

   408 		{

   409 			log("Unaliagned word write: %08x to %08x from %08x\n",

   410 			    value,

   411 			    address,

   412 			    armMode ? armNextPC - 4 : armNextPC - 2);

   413 		}

   414 	}

   415 #endif

   416 

   417 	switch (address >> 24)

   418 	{

   419 	case 0x02:

   420 #ifdef SDL

   421 		if (*((u32 *)&freezeWorkRAM[address & 0x3FFFC]))

   422 			cheatsWriteMemory((u32 *)&workRAM[address & 0x3FFFC],

   423 			                  value,

   424 			                  *((u32 *)&freezeWorkRAM[address & 0x3FFFC]));

   425 		else

   426 #endif

   427 		WRITE32LE(((u32 *)&workRAM[address & 0x3FFFC]), value);

   428 		break;

   429 	case 0x03:

   430 #ifdef SDL

   431 		if (*((u32 *)&freezeInternalRAM[address & 0x7ffc]))

   432 			cheatsWriteMemory((u32 *)&internalRAM[address & 0x7FFC],

   433 			                  value,

   434 			                  *((u32 *)&freezeInternalRAM[address & 0x7ffc]));

   435 		else

   436 #endif

   437 		WRITE32LE(((u32 *)&internalRAM[address & 0x7ffC]), value);

   438 		break;

   439 	case 0x04:

   440 		CPUUpdateRegister((address & 0x3FC), value & 0xFFFF);

   441 		CPUUpdateRegister((address & 0x3FC) + 2, (value >> 16));

   442 		break;

   443 	case 0x05:

   444 		WRITE32LE(((u32 *)&paletteRAM[address & 0x3FC]), value);

   445 		break;

   446 	case 0x06:

   447 		if (address & 0x10000)

   448 			WRITE32LE(((u32 *)&vram[address & 0x17ffc]), value);

   449 		else

   450 			WRITE32LE(((u32 *)&vram[address & 0x1fffc]), value);

   451 		break;

   452 	case 0x07:

   453 		WRITE32LE(((u32 *)&oam[address & 0x3fc]), value);

   454 		break;

   455 	case 0x0D:

   456 		if (cpuEEPROMEnabled)

   457 		{

   458 			eepromWrite(address, value);

   459 			break;

   460 		}

   461 		goto unwritable;

   462 	case 0x0E:

   463 		if (!eepromInUse | cpuSramEnabled | cpuFlashEnabled)

   464 		{

   465 			(*cpuSaveGameFunc)(address, (u8)value);

   466 			break;

   467 		}

   468 	// default

   469 	default:

   470 unwritable:

   471 #ifdef GBA_LOGGING

   472 		if (systemVerbose & VERBOSE_ILLEGAL_WRITE)

   473 		{

   474 			log("Illegal word write: %08x to %08x from %08x\n",

   475 			    value,

   476 			    address,

   477 			    armMode ? armNextPC - 4 : armNextPC - 2);

   478 		}

   479 #endif

   480 		break;

   481 	}

   482 }

   483 

   484 inline void CPUWriteMemory(u32 address, u32 value)

   485 {

   486 	CPUWriteMemoryWrapped(address, value);

   487 	CallRegisteredLuaMemHook(address, 4, value, LUAMEMHOOK_WRITE);

   488 }

   489 

   490 #endif // VBA_GBAINLINE_H
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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