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/***************************************************************************
* Copyright (C) 2007 Ryan Schultz, PCSX-df Team, 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. *
***************************************************************************/
/*
* PSX memory functions.
*/
// TODO: Implement caches & cycle penalty.
#include "psxmem.h"
#include "r3000a.h"
#include "psxhw.h"
#include <sys/mman.h>
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
s8 *psxP = NULL; // Parallel Port (64K)
s8 *psxR = NULL; // BIOS ROM (512K)
s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
u8 **psxMemWLUT = NULL;
u8 **psxMemRLUT = NULL;
/* Playstation Memory Map (from Playstation doc by Joshua Walker)
0x0000_0000-0x0000_ffff Kernel (64K)
0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
0x1f00_0000-0x1f00_ffff Parallel Port (64K)
0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
0x1fc0_0000-0x1fc7_ffff BIOS (512K)
0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
*/
int psxMemInit() {
int i;
psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
psxM = mmap(0, 0x00220000,
PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
psxP = &psxM[0x200000];
psxH = &psxM[0x210000];
psxR = (s8 *)malloc(0x00080000);
if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
psxM == NULL || psxP == NULL || psxH == NULL) {
SysMessage(_("Error allocating memory!"));
return -1;
}
// MemR
for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
psxMemRLUT[0x1f00] = (u8 *)psxP;
psxMemRLUT[0x1f80] = (u8 *)psxH;
for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
// MemW
for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
psxMemWLUT[0x1f00] = (u8 *)psxP;
psxMemWLUT[0x1f80] = (u8 *)psxH;
return 0;
}
void psxMemReset() {
FILE *f = NULL;
char bios[1024];
memset(psxM, 0, 0x00200000);
memset(psxP, 0, 0x00010000);
if (strcmp(Config.Bios, "HLE") != 0) {
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 = TRUE;
} else {
fread(psxR, 1, 0x80000, f);
fclose(f);
Config.HLE = FALSE;
}
} else Config.HLE = TRUE;
}
void psxMemShutdown() {
munmap(psxM, 0x00220000);
free(psxR);
free(psxMemRLUT);
free(psxMemWLUT);
}
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 *)(psxMemRLUT[t]);
if (p != NULL) {
if (Config.Debug)
DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
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 *)(psxMemRLUT[t]);
if (p != NULL) {
if (Config.Debug)
DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
return SWAPu16(*(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 *)(psxMemRLUT[t]);
if (p != NULL) {
if (Config.Debug)
DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
return SWAPu32(*(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 *)(psxMemWLUT[t]);
if (p != NULL) {
if (Config.Debug)
DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
*(u8 *)(p + (mem & 0xffff)) = value;
#ifdef PSXREC
psxCpu->Clear((mem & (~3)), 1);
#endif
} 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)
psxHu16ref(mem) = SWAPu16(value);
else
psxHwWrite16(mem, value);
} else {
p = (char *)(psxMemWLUT[t]);
if (p != NULL) {
if (Config.Debug)
DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
*(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
#ifdef PSXREC
psxCpu->Clear((mem & (~1)), 1);
#endif
} else {
#ifdef PSXMEM_LOG
PSXMEM_LOG("err sh %8.8lx\n", mem);
#endif
}
}
}
void psxMemWrite32(u32 mem, u32 value) {
char *p;
u32 t;
// if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
t = mem >> 16;
if (t == 0x1f80) {
if (mem < 0x1f801000)
psxHu32ref(mem) = SWAPu32(value);
else
psxHwWrite32(mem, value);
} else {
p = (char *)(psxMemWLUT[t]);
if (p != NULL) {
if (Config.Debug)
DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
*(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
#ifdef PSXREC
psxCpu->Clear(mem, 1);
#endif
} else {
if (mem != 0xfffe0130) {
#ifdef PSXREC
if (!writeok)
psxCpu->Clear(mem, 1);
#endif
#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(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
break;
case 0x00: case 0x1e988:
if (writeok == 1) break;
writeok = 1;
for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
break;
default:
#ifdef PSXMEM_LOG
PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
#endif
break;
}
}
}
}
}
void *psxMemPointer(u32 mem) {
char *p;
u32 t;
t = mem >> 16;
if (t == 0x1f80) {
if (mem < 0x1f801000)
return (void *)&psxH[mem];
else
return NULL;
} else {
p = (char *)(psxMemWLUT[t]);
if (p != NULL) {
return (void *)(p + (mem & 0xffff));
}
return NULL;
}
}
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