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-rw-r--r--lib/mipsmem.cpp349
1 files changed, 349 insertions, 0 deletions
diff --git a/lib/mipsmem.cpp b/lib/mipsmem.cpp
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+++ b/lib/mipsmem.cpp
@@ -0,0 +1,349 @@
+/*
+ * PSX-Tools Bundle Pack
+ * Copyright (C) 2002-2003 Nicolas "Pixel" Noble
+ *
+ * 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
+ */
+
+/* $Id: mipsmem.cpp,v 1.1 2004-01-03 15:04:47 pixel Exp $ */
+
+#include "mipsmem.h"
+
+refto_t::refto_t(Uint32 to, memdata * _m) : reffrom(new reffrom_t(this, _m->getmem(to))), mem(_m) {
+ refto_t * t = mem->getrefto();
+ if (t)
+ delete t;
+ mem->setrefto(this);
+}
+
+refto_t::~refto_t() {
+ mem->setrefto(0);
+ delete reffrom;
+}
+
+memdata * refto_t::getmem() {
+ return mem;
+}
+
+memdata * refto_t::getref() {
+ return reffrom->getmem();
+}
+
+reffrom_t::reffrom_t(refto_t * _refto, memdata * _m) : refto(_refto), header(_m) {
+ next = header->getreffrom();
+ prev = 0;
+ header->setreffrom(this);
+ if (next)
+ next->prev = this;
+}
+
+reffrom_t::~reffrom_t() {
+ if (next)
+ next->prev = prev;
+ if (prev)
+ prev->next = next;
+ else
+ header->setreffrom(next);
+}
+
+memdata * reffrom_t::getmem() {
+ return header;
+}
+
+memdata * reffrom_t::getref() {
+ return refto->getmem();
+}
+
+reffrom_t * reffrom_t::getnext() {
+ return next;
+}
+
+memdata::memdata(Uint32 _address, mipsmem * _mm) : address(_address), mm(_mm), func(0), refto(0), reffrom(0) {
+ mm->SetDatas(address, this);
+}
+
+memdata::~memdata() {
+ mm->SetDatas(address, 0);
+}
+
+Uint32 memdata::getaddress() {
+ return address;
+}
+
+memdata * memdata::getmem(Uint32 addr) {
+ return getmem(addr, mm);
+}
+
+memdata * memdata::getmem(Uint32 addr, mipsmem * mm) {
+ memdata * t = mm->GetDatas(addr);
+
+ if (!t) {
+ t = new memdata(addr, mm);
+ }
+ return t;
+}
+
+func_t * memdata::getfunc() {
+ return func;
+}
+
+refto_t * memdata::getrefto() {
+ return refto;
+}
+
+reffrom_t * memdata::getreffrom() {
+ return reffrom;
+}
+
+void memdata::setfunc(func_t * f) {
+ func = f;
+ checkdestroy();
+}
+
+void memdata::setrefto(refto_t * r) {
+ refto = r;
+ checkdestroy();
+}
+
+void memdata::setreffrom(reffrom_t * r) {
+ reffrom = r;
+ checkdestroy();
+}
+
+void memdata::checkdestroy() {
+ if (!func && !refto && !reffrom) {
+ delete this;
+ }
+}
+
+
+mipsmem::mipsmem() {
+ memset(psyqhead, 0, 0x800);
+ memset(plainmemory, 0, PSXMEM);
+ memset(patches, 0, PSXMEM);
+ memset(patchesmap, 0, PSXMEM / 8);
+ memset(tags, 0, PSXMEM);
+ memset(datas, 0, PSXMEM * sizeof(memdata *));
+}
+
+Uint8 mipsmem::Read8(Uint32 mem) {
+ if ((mem < 0x80000000) || (mem >= (0x80000000 + PSXMEM))) {
+ printm(M_WARNING, "Reading at out of bound of memory: 0x%08x\n", mem);
+ return 0xff;
+ }
+
+ mem -= 0x80000000;
+
+ if (IsPatched(mem)) {
+ return patches[mem];
+ } else {
+ return plainmemory[mem];
+ }
+}
+
+Uint16 mipsmem::Read16(Uint32 mem) {
+ Uint8 a, b;
+
+ if (mem & 1) {
+ printm(M_WARNING, "Read16 at a non 16-bits boundary: 0x%08x\n", mem);
+ }
+
+ a = Read8(mem);
+ b = Read8(mem + 1);
+
+ return a | (b << 8);
+}
+
+Uint32 mipsmem::Read32(Uint32 mem) {
+ Uint8 a, b, c, d;
+
+ if (mem & 3) {
+ printm(M_WARNING, "Read32 at a non 32-bits boundary: 0x%08x\n", mem);
+ }
+
+ a = Read8(mem);
+ b = Read8(mem + 1);
+ c = Read8(mem + 2);
+ d = Read8(mem + 3);
+
+ return a | (b << 8) | (c << 16) | (d << 24);
+}
+
+void mipsmem::Write8(Uint32 mem, Uint8 value) {
+ if ((mem < 0x80000000) || (mem > (0x80000000 + PSXMEM - 1))) {
+ printm(M_WARNING, "Writing at out of bound of memory: 0x%08x\n", mem);
+ return;
+ }
+
+ mem -= 0x80000000;
+
+ patch(mem, 1);
+ patches[mem] = value;
+}
+
+void mipsmem::Write16(Uint32 mem, Uint16 value) {
+ if ((mem < 0x80000000) || (mem > (0x80000000 + PSXMEM - 2))) {
+ printm(M_WARNING, "Writing at out of bound of memory: 0x%08x\n", mem);
+ return;
+ }
+
+ mem -= 0x80000000;
+
+ patch(mem, 2);
+ patches[mem] = value & 0xff;
+ patches[mem + 1] = (value >> 8) & 0xff;
+}
+
+void mipsmem::Write32(Uint32 mem, Uint32 value) {
+ if ((mem < 0x80000000) || (mem > (0x80000000 + PSXMEM - 4))) {
+ printm(M_WARNING, "Writing at out of bound of memory: 0x%08x\n", mem);
+ return;
+ }
+
+ mem -= 0x80000000;
+
+ patch(mem, 4);
+ patches[mem] = value & 0xff;
+ patches[mem + 1] = (value >> 8) & 0xff;
+ patches[mem + 2] = (value >> 16) & 0xff;
+ patches[mem + 3] = (value >> 24) & 0xff;
+}
+
+void mipsmem::unpatch8(Uint32 mem) {
+ unpatch(mem, 1);
+}
+
+void mipsmem::unpatch16(Uint32 mem) {
+ unpatch(mem, 2);
+}
+
+void mipsmem::unpatch32(Uint32 mem) {
+ unpatch(mem, 4);
+}
+
+bool mipsmem::IsPatched(Uint32 mem) {
+ int mask, pos;
+
+ pos = mem / 8;
+ mask = 1 << (mem % 8);
+
+ return patchesmap[pos] & mask;
+}
+
+void mipsmem::LoadPSYQ(Handle * h) {
+ h->read(psyqhead, 0x800);
+ memset(plainmemory, 0, PSXMEM);
+ paddr = ((psyq*)psyqhead)->t_addr;
+ psize = ((psyq*)psyqhead)->t_size;
+ startpc = ((psyq*)psyqhead)->pc0;
+
+ printm(M_INFO, "Loading %i (%08x) bytes of data at %i (%08x).\n", psize, psize, paddr - 0x80000000, paddr);
+
+ h->read(plainmemory + paddr - 0x80000000, psize);
+}
+
+void mipsmem::SavePSYQ(Handle * h) {\
+ Uint32 i;
+
+ if (!*((Uint32 *)psyqhead))
+ return;
+ h->write(psyqhead, 0x800);
+ paddr = ((psyq*)psyqhead)->t_addr;
+ psize = ((psyq*)psyqhead)->t_size;
+
+ printm(M_INFO, "Writing %i (%08x) bytes of data from %i (%08x).\n", psize, psize, paddr - 0x80000000, paddr);
+
+ for (i = paddr - 0x80000000; i < psize; i++) {
+ h->writeU8(Read8(i));
+ }
+}
+
+bool mipsmem::GetTag(Uint32 addr, char tag) {
+ int mask;
+
+ if ((addr < 0x80000000) || (addr >= (0x80000000 + PSXMEM))) {
+ printm(M_WARNING, "Reading tag at out of bound of memory: 0x%08x\n", addr);
+ return false;
+ }
+
+ mask = 1 << tag;
+ addr -= 0x80000000;
+
+ return tags[addr] & mask;
+}
+
+void mipsmem::SetTag(Uint32 addr, char tag, bool t) {
+ int mask;
+
+ if ((addr < 0x80000000) || (addr >= (0x80000000 + PSXMEM))) {
+ printm(M_WARNING, "Setting tag at out of bound of memory: 0x%08x\n", addr);
+ return;
+ }
+
+ mask = 1 << tag;
+ addr -= 0x80000000;
+
+ if (t) {
+ tags[addr] |= mask;
+ } else {
+ tags[addr] &= ~mask;
+ }
+}
+
+memdata * mipsmem::GetDatas(Uint32 addr) {
+ return datas[addr];
+}
+
+void mipsmem::SetDatas(Uint32 addr, memdata * p) {
+ datas[addr] = p;
+}
+
+Uint32 mipsmem::GetPC() {
+ return startpc;
+}
+
+Uint32 mipsmem::GetLower() {
+ return paddr;
+}
+
+Uint32 mipsmem::GetUpper() {
+ return paddr + psize;
+}
+
+void mipsmem::patch(Uint32 mem, int size) {
+ int mask, pos;
+
+ pos = mem / 8;
+ mask = 1 << (mem % 8);
+
+ patchesmap[pos] |= mask;
+
+ if (size != 1) {
+ patch(mem + 1, size - 1);
+ }
+}
+
+void mipsmem::unpatch(Uint32 mem, int size) {
+ int mask, pos;
+
+ pos = mem / 8;
+ mask = ~(1 << (mem % 8));
+
+ patchesmap[pos] &= mask;
+
+ if (size != 1) {
+ unpatch(mem + 1, size - 1);
+ }
+}
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