mirror of
https://github.com/ApacheThunder/GBA-Exploader.git
synced 2025-06-18 11:35:38 -04:00
11ea610150
* FIFO on arm7 appears to now work as intended. * GBA mode switch funcition remains broken. * Default GBA_Exploader.ini file now created if one is not present. * Moved GBA_File struct to ctrl_tble and removed duplicate from main.c. This was causing issues where I would forget to update both when I removed the now unused Alias char array. All code now shares the single instance which will prevent this issue should this struct need to be updated in the future.
156 lines
2.7 KiB
C
156 lines
2.7 KiB
C
/***********************************************************
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Arm7 Soft rest for General purpose
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by Rudolph (<28>c’é)
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***************************************************************/
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#include <nds.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define ARM7_PROG (0x03810000 - 0xA00)
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#define SOUND_CR REG_SOUNDCNT
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typedef void (* FN_MEDIUM_ARM7)(void);
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FN_MEDIUM_ARM7 _menu7_Gen;
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extern void _menu7_Gen_s();
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void ret_menu7_Gen() {
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u32 *adr;
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u32 *buf;
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u32 i;
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while((*(vu32*)0x027FFDFC) != 0x027FFDF8) { // Timing adjustment with ARM9
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vu32 w;
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for(w=0;w<0x100;w++);
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}
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REG_IME = IME_DISABLE; // Disable interrupts
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REG_IF = REG_IF; // Acknowledge interrupt
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// REG_IME = 0;
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for (i = 0x04000400; i < 0x04000500; i+=4)*((u32*)i) = 0;
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SOUND_CR = 0;
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for(i = 0x040000B0; i < (0x040000B0+0x30); i+=4)*((vu32*)i) = 0;
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for(i = 0x04000100; i < 0x04000110; i+=2)*((u16*)i) = 0;
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//switch to user mode
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asm("mov r0, #0x1F");
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asm("msr cpsr, r0");
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adr = (u32*)ARM7_PROG;
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buf = (u32*)_menu7_Gen_s;
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for(i = 0; i < 0x200/4; i++) {
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*adr = *buf;
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adr++;
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buf++;
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}
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_menu7_Gen = (FN_MEDIUM_ARM7)ARM7_PROG;
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_menu7_Gen();
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while(1);
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}
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void _menu7_Gen_s() {
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u32 *adr;
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u32 *bufh, *buf7, *buf9;
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u32 siz;
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u32 i;
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u32 *arm9s, *arm9e;
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u32 *arm7s, *arm7e;
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bufh = (u32*)(*(vu32*)0x027FFDF4);
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adr = (u32*)0x027FFE00;
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for(i = 0; i < 512/4; i++) { // Header
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*adr = *bufh;
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adr++;
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bufh++;
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}
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buf9 = bufh;
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buf7 = buf9 + ((*(vu32*)0x027FFE2C) / 4);
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adr = (u32*)(*(vu32*)0x027FFE38);
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siz = (*(vu32*)0x027FFE3C);
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for(i = 0; i < siz/4; i++) { // ARM7
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*adr = *buf7;
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adr++;
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buf7++;
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}
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arm7e = adr;
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adr = (u32*)(*(vu32*)0x027FFE28);
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siz = (*(vu32*)0x027FFE2C);
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if(adr < buf9) { // ARM9
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for(i = 0; i < siz/4; i++) {
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*adr = *buf9;
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adr++;
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buf9++;
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}
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arm9e = adr;
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} else {
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adr += (siz/4 - 1);
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buf9 += (siz/4 - 1);
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arm9e = adr + 1;
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for(i = 0; i < siz/4; i++) {
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*adr = *buf9;
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adr--;
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buf9--;
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}
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}
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arm7s = (u32*)(*(vu32*)0x027FFE38);
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if(arm7s > (u32*)0x023FF800)
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arm7s = (u32*)0x023FF800;
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arm9s = (u32*)(*(vu32*)0x027FFE28);
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if(arm9s > arm7s) {
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adr = arm9s;
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arm9s = arm7s;
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arm7s = adr;
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adr = arm9e;
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arm9e = arm7e;
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arm7e = adr;
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}
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adr = (u32*)0x02000000;
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while(adr < arm9s) {
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*adr = 0x00000000;
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adr++;
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}
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while(arm9e < arm7s) {
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*arm9e = 0x00000000;
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arm9e++;
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}
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while(arm7e < (u32*)0x023FF800) {
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*arm7e = 0x00000000;
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arm7e++;
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}
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REG_IE = 0;
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REG_IF = ~0;
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(*(vu32*)(0x04000000-4)) = 0; //IRQ_HANDLER ARM7 version
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(*(vu32*)(0x04000000-8)) = ~0; //VBLANK_INTR_WAIT_FLAGS, ARM7 version
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REG_POWERCNT = 1; //turn off power to stuffs
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*(vu32*)0x027FFDFC = *(vu32*)0x027FFE24;
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asm("swi 0x00"); // JUMP 0x027FFE34
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while(1);
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}
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