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/* Pcsx - Pc Psx Emulator
* Copyright (C) 1999-2002 Pcsx Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include <stdlib.h>
#include "PsxCommon.h"
int psxMemInit() {
int i;
psxMemLUT = (long*)malloc(0x10000 * 4);
memset(psxMemLUT, 0, 0x10000 * 4);
psxM = (char*)malloc(0x00200000);
psxP = (char*)malloc(0x00010000);
psxH = (char*)malloc(0x00010000);
psxR = (char*)malloc(0x00080000);
if (psxMemLUT == NULL || psxM == NULL || psxP == NULL || psxH == NULL || psxR == NULL) {
SysMessage("Error allocating memory"); return -1;
}
for (i=0; i<0x80; i++) psxMemLUT[i + 0x0000] = (u32)&psxM[(i & 0x1f) << 16];
memcpy(psxMemLUT + 0x8000, psxMemLUT, 0x80 * 4);
memcpy(psxMemLUT + 0xa000, psxMemLUT, 0x80 * 4);
for (i=0; i<0x01; i++) psxMemLUT[i + 0x1f00] = (u32)&psxP[i << 16];
for (i=0; i<0x01; i++) psxMemLUT[i + 0x1f80] = (u32)&psxH[i << 16];
for (i=0; i<0x08; i++) psxMemLUT[i + 0xbfc0] = (u32)&psxR[i << 16];
return 0;
}
void psxMemReset() {
FILE *f = NULL;
char Bios[256];
memset(psxM, 0, 0x00200000);
memset(psxP, 0, 0x00010000);
if (strcmp(Config.Bios, "HLE")) {
sprintf(Bios, "%s%s", Config.BiosDir, Config.Bios);
f = fopen(Bios, "rb");
if (f == NULL) {
SysMessage ("Could not open bios:\"%s\". Enabling HLE Bios\n", Bios);
memset(psxR, 0, 0x80000);
Config.HLE = 1;
}
else {
fread(psxR, 1, 0x80000, f);
fclose(f);
Config.HLE = 0;
}
} else Config.HLE = 1;
}
void psxMemShutdown() {
free(psxM);
free(psxP);
free(psxH);
free(psxR);
free(psxMemLUT);
}
static int writeok=1;
u8 psxMemRead8(u32 mem) {
char *p;
u32 t;
t = mem >> 16;
if (t == 0x1f80) {
if (mem < 0x1f801000)
return psxHu8(mem);
else
return psxHwRead8(mem);
} else {
p = (char *)(psxMemLUT[t]);
if (p != NULL) {
return *(u8 *)(p + (mem & 0xffff));
} else {
#ifdef PSXMEM_LOG
PSXMEM_LOG("err lb %8.8lx\n", mem);
#endif
return 0;
}
}
}
u16 psxMemRead16(u32 mem) {
char *p;
u32 t;
t = mem >> 16;
if (t == 0x1f80) {
if (mem < 0x1f801000)
return psxHu16(mem);
else
return psxHwRead16(mem);
} else {
p = (char *)(psxMemLUT[t]);
if (p != NULL) {
return *(u16 *)(p + (mem & 0xffff));
} else {
#ifdef PSXMEM_LOG
PSXMEM_LOG("err lh %8.8lx\n", mem);
#endif
return 0;
}
}
}
u32 psxMemRead32(u32 mem) {
char *p;
u32 t;
t = mem >> 16;
if (t == 0x1f80) {
if (mem < 0x1f801000)
return psxHu32(mem);
else
return psxHwRead32(mem);
} else {
p = (char *)(psxMemLUT[t]);
if (p != NULL) {
return *(u32 *)(p + (mem & 0xffff));
} else {
#ifdef PSXMEM_LOG
if (writeok) PSXMEM_LOG("err lw %8.8lx\n", mem);
#endif
return 0;
}
}
}
void psxMemWrite8(u32 mem, u8 value) {
char *p;
u32 t;
t = mem >> 16;
if (t == 0x1f80) {
if (mem < 0x1f801000)
psxHu8(mem) = value;
else
psxHwWrite8(mem, value);
} else {
p = (char *)(psxMemLUT[t]);
if (p != NULL) {
*(u8 *)(p + (mem & 0xffff)) = value;
psxCpu->Clear(mem, 1);
} else {
#ifdef PSXMEM_LOG
PSXMEM_LOG("err sb %8.8lx\n", mem);
#endif
}
}
}
void psxMemWrite16(u32 mem, u16 value) {
char *p;
u32 t;
t = mem >> 16;
if (t == 0x1f80) {
if (mem < 0x1f801000)
psxHu16(mem) = value;
else
psxHwWrite16(mem, value);
} else {
p = (char *)(psxMemLUT[t]);
if (p != NULL) {
*(u16 *)(p + (mem & 0xffff)) = value;
psxCpu->Clear(mem, 1);
} else {
#ifdef PSXMEM_LOG
PSXMEM_LOG("err sh %8.8lx\n", mem);
#endif
}
}
}
void psxMemWrite32(u32 mem, u32 value) {
char *p;
u32 t;
t = mem >> 16;
if (t == 0x1f80) {
if (mem < 0x1f801000)
psxHu32(mem) = value;
else
psxHwWrite32(mem, value);
} else {
p = (char *)(psxMemLUT[t]);
if (p != NULL) {
*(u32 *)(p + (mem & 0xffff)) = value;
psxCpu->Clear(mem, 1);
} else {
if (mem != 0xfffe0130) {
if (!writeok) psxCpu->Clear(mem, 1);
#ifdef PSXMEM_LOG
if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
#endif
} else {
int i;
switch (value) {
case 0x800: case 0x804:
if (writeok == 0) break;
writeok = 0;
memset(psxMemLUT + 0x0000, 0, 0x80 * 4);
memset(psxMemLUT + 0x8000, 0, 0x80 * 4);
memset(psxMemLUT + 0xa000, 0, 0x80 * 4);
break;
case 0x1e988:
if (writeok == 1) break;
writeok = 1;
for (i=0; i<0x80; i++) psxMemLUT[i + 0x0000] = (u32)&psxM[(i & 0x1f) << 16];
memcpy(psxMemLUT + 0x8000, psxMemLUT, 0x80 * 4);
memcpy(psxMemLUT + 0xa000, psxMemLUT, 0x80 * 4);
break;
default:
#ifdef PSXMEM_LOG
PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
#endif
break;
}
}
}
}
}
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