pcsxr-1.9.92

1 files changed, 348 insertions, 0 deletions

diff --git a/libpcsxcore/psxmem.c b/libpcsxcore/psxmem.c
new file mode 100644
index 0000000..fc4a90e
--- /dev/null
+++ b/libpcsxcore/psxmem.c
@@ -0,0 +1,348 @@
+/***************************************************************************
+ *   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;
+	}
+}