project64/Source/Android/PluginRSP/cicx105.cpp

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/****************************************************************************
* *
* Project64 - A Nintendo 64 emulator. *
* http://www.pj64-emu.com/ *
* Copyright (C) 2016 Project64. All rights reserved. *
* *
* License: *
* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
* *
****************************************************************************/
#include "stdafx.h"
#include <string.h>
/**
* During IPL3 stage of CIC x105 games, the RSP performs some checks and transactions
* necessary for booting the game.
*
* We only implement the needed DMA transactions for booting.
*
* Found in Banjo-Tooie, Zelda, Perfect Dark, ...)
**/
void cicx105_ucode(CHle * hle)
{
/* memcpy is okay to use because access constrains are met (alignment, size) */
unsigned int i;
unsigned char *dst = hle->dram() + 0x2fb1f0;
unsigned char *src = hle->imem() + 0x120;
/* dma_read(0x1120, 0x1e8, 0x1e8) */
memcpy(hle->imem() + 0x120, hle->dram() + 0x1e8, 0x1f0);
/* dma_write(0x1120, 0x2fb1f0, 0xfe817000) */
for (i = 0; i < 24; ++i)
{
memcpy(dst, src, 8);
dst += 0xff0;
src += 0x8;
}
}