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https://github.com/ApacheThunder/NTR_Launcher.git
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7941919f54
* Fix issues that may prevent some retail carts from booting. * Included changes to bootloader newer commits to slot1launch code
102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/*
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NitroHax -- Cheat tool for the Nintendo DS
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Copyright (C) 2008 Michael "Chishm" Chisholm
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include <nds.h>
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#include "load_bin.h"
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#include "launch_engine.h"
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#define LCDC_BANK_D (u16*)0x06860000
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#define DSIMODE_OFFSET 4
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#define LANGUAGE_OFFSET 8
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#define SDACCESS_OFFSET 12
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#define SCFGUNLOCK_OFFSET 16
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#define TWLMODE_OFFSET 20
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#define TWLCLOCK_OFFSET 24
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#define BOOSTVRAM_OFFSET 28
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#define SOUNDFREQ_OFFSET 32
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#define EXTENDRAM_OFFSET 36
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#define DEBUGMODE_OFFSET 40
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typedef signed int addr_t;
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typedef unsigned char data_t;
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static void writeAddr (data_t *mem, addr_t offset, addr_t value) { ((addr_t*)mem)[offset/sizeof(addr_t)] = value; }
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void vramcpy (void* dst, const void* src, int len) {
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u16* dst16 = (u16*)dst;
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u16* src16 = (u16*)src;
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for ( ; len > 0; len -= 2) { *dst16++ = *src16++; }
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}
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void runLaunchEngine (bool EnableSD, int language, bool scfgUnlock, bool TWLMODE, bool TWLCLK, bool TWLVRAM, bool soundFreq, bool extendRam, bool debugMode) {
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// nocashMessage("runLaunchEngine");
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irqDisable(IRQ_ALL);
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// Direct CPU access to VRAM bank D
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VRAM_D_CR = VRAM_ENABLE | VRAM_D_LCD;
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// Clear VRAM
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memset (LCDC_BANK_D, 0x00, 128 * 1024);
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// Load the loader/patcher into the correct address
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vramcpy (LCDC_BANK_D, load_bin, load_bin_size);
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// Set the parameters for the loader
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writeAddr ((data_t*) LCDC_BANK_D, DSIMODE_OFFSET, isDSiMode());
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writeAddr ((data_t*) LCDC_BANK_D, LANGUAGE_OFFSET, language);
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writeAddr ((data_t*) LCDC_BANK_D, SDACCESS_OFFSET, EnableSD);
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writeAddr ((data_t*) LCDC_BANK_D, SCFGUNLOCK_OFFSET, scfgUnlock);
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writeAddr ((data_t*) LCDC_BANK_D, TWLMODE_OFFSET, TWLMODE);
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writeAddr ((data_t*) LCDC_BANK_D, TWLCLOCK_OFFSET, TWLCLK);
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writeAddr ((data_t*) LCDC_BANK_D, BOOSTVRAM_OFFSET, TWLVRAM);
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writeAddr ((data_t*) LCDC_BANK_D, SOUNDFREQ_OFFSET, soundFreq);
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writeAddr ((data_t*) LCDC_BANK_D, EXTENDRAM_OFFSET, extendRam);
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writeAddr ((data_t*) LCDC_BANK_D, DEBUGMODE_OFFSET, debugMode);
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// nocashMessage("irqDisable(IRQ_ALL);");
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irqDisable(IRQ_ALL);
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// Give the VRAM to the ARM7
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// nocashMessage("Give the VRAM to the ARM7");
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VRAM_D_CR = VRAM_ENABLE | VRAM_D_ARM7_0x06020000;
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// Reset into a passme loop
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nocashMessage("Reset into a passme loop");
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REG_EXMEMCNT |= ARM7_OWNS_ROM | ARM7_OWNS_CARD;
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*(vu32*)0x02FFFFFC = 0;
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// Return to passme loop
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*(vu32*)0x02FFFE04 = (u32)0xE59FF018; // ldr pc, 0x02FFFE24
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*(vu32*)0x02FFFE24 = (u32)0x02FFFE04; // Set ARM9 Loop address --> resetARM9(0x02FFFE04);
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// Reset ARM7
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// nocashMessage("resetARM7");
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resetARM7(0x06020000);
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// swi soft reset
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// nocashMessage("swiSoftReset");
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swiSoftReset();
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}
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