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#include "mips.h"
Uint8 mips::Read8(Uint32 mem) {
if ((mem < 0x80000000) || (mem >= 0x80200000)) {
printm(M_WARNING, "Reading at out of bound of memory: 0x%08x\n", mem);
return 0;
}
mem -= 0x80000000;
if (IsPatched(mem)) {
return patches[mem];
} else {
return plainmemory[mem];
}
}
Uint16 mips::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 mips::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 mips::Write8(Uint32 mem, Uint8 value) {
if ((mem < 0x80000000) || (mem > (0x80200000 - 1))) {
printm(M_WARNING, "Reading at out of bound of memory: 0x%08x\n", mem);
return;
}
mem -= 0x80000000;
patch(mem, 1);
patches[mem] = value;
}
void mips::Write16(Uint32 mem, Uint16 value) {
if ((mem < 0x80000000) || (mem > (0x80200000 - 2))) {
printm(M_WARNING, "Reading 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 mips::Write32(Uint32 mem, Uint32 value) {
if ((mem < 0x80000000) || (mem > (0x80200000 - 4))) {
printm(M_WARNING, "Reading 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 mips::unpatch8(Uint32 mem) {
unpatch(mem, 1);
}
void mips::unpatch16(Uint32 mem) {
unpatch(mem, 2);
}
void mips::unpatch32(Uint32 mem) {
unpatch(mem, 4);
}
bool mips::IsPatched(Uint32 mem) {
int mask, pos;
pos = mem / 8;
mask = 1 << (mem % 8);
return patchesmap[pos] &= mask;
}
void mips::LoadEXE(Handle * h) {
h->read(psyqhead, 0x800);
memset(plainmemory, 0, 0x200000);
paddr = ((psyq*)psyqhead)->t_addr;
psize = ((psyq*)psyqhead)->t_size;
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 mips::SaveEXE(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));
}
}
Uint32 mips::GetPC() {
return startpc;
}
void mips::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 mips::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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