90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
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/*
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* firm.c
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* by Reisyukaku
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*/
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#include "firm.h"
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#include "patches.h"
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#include "memory.h"
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#include "types.h"
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#include "fs.h"
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#include "emunand.h"
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firmHeader *firmLocation = (firmHeader *)0x24000000;
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const u32 firmSize = 0xF1000;
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firmSectionHeader *section;
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void loadSplash(void){
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fileRead((u8 *)0x20047000, "/rei/splash.bin", 0x46500); //ghetto because address varies i think
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while(((~*(unsigned *)0x10146000) & 0xFFF) == (1 << 3) ? 0 : 1); //Press start to boot
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}
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void loadFirm(void){
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//Read FIRM from SD card and write to FCRAM
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fileRead((u8*)firmLocation, "/rei/firmware.bin", firmSize);
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section = firmLocation->section;
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}
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void patchFirm(void){
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//Part1: Add emunand parsing code
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u32 offset = 0;
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u32 header = 0;
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if(getEmunand(&offset, &header) == 1){
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fileRead((u8*)emuCode, "/rei/emunand/emunand.bin", 0);
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u32 *pos_offset = memsearch((u8*)emuCode, "NAND", 0x218, 4);
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u32 *pos_header = memsearch((u8*)emuCode, "NCSD", 0x218, 4);
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memcpy((void *)pos_offset, (void *)offset, 4);
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memcpy((void *)pos_header, (void *)header, 4);
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}
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//Part2: Add emunand hooks
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memcpy((u8*)emuHook1, eh1, sizeof(eh1));
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memcpy((u8*)emuHook2, eh2, sizeof(eh2));
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memcpy((u8*)emuHook3, eh3, sizeof(eh3));
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memcpy((u8*)emuHook4, eh4, sizeof(eh4));
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//Part3: Disable signature checks
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memcpy((u8*)patch1, p1, sizeof(p1));
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memcpy((u8*)patch2, p2, sizeof(p2));
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//Part4: Create arm9 thread
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fileRead((u8*)threadCode, "/rei/thread/arm9.bin", 0);
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memcpy((u8*)threadHook1, th1, sizeof(th1));
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memcpy((u8*)threadHook2, th2, sizeof(th2));
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}
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void launchFirm(void){
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//Set MPU
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__asm__ (
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"msr cpsr_c, #0xDF\n\t"
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"ldr r0, =0x10000035\n\t"
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"ldr r4, =0x18000035\n\t"
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"mcr p15, 0, r0, c6, c3, 0\n\t"
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"mcr p15, 0, r4, c6, c4, 0\n\t"
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"mrc p15, 0, r0, c2, c0, 0\n\t"
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"mrc p15, 0, r4, c2, c0, 1\n\t"
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"mrc p15, 0, r1, c3, c0, 0\n\t"
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"mrc p15, 0, r2, c5, c0, 2\n\t"
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"mrc p15, 0, r3, c5, c0, 3\n\t"
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"orr r0, r0, #0x30\n\t"
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"orr r4, r4, #0x30\n\t"
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"orr r1, r1, #0x30\n\t"
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"bic r2, r2, #0xF0000\n\t"
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"bic r3, r3, #0xF0000\n\t"
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"orr r2, r2, #0x30000\n\t"
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"orr r3, r3, #0x30000\n\t"
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"mcr p15, 0, r0, c2, c0, 0\n\t"
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"mcr p15, 0, r4, c2, c0, 1\n\t"
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"mcr p15, 0, r1, c3, c0, 0\n\t"
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"mcr p15, 0, r2, c5, c0, 2\n\t"
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"mcr p15, 0, r3, c5, c0, 3\n\t"
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::: "r0", "r1", "r2", "r3", "r4"
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);
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//Copy firm partitions to respective memory locations
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memcpy(section[0].address, (u8*)firmLocation + section[0].offset, section[0].size);
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memcpy(section[1].address, (u8*)firmLocation + section[1].offset, section[1].size);
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memcpy(section[2].address, (u8*)firmLocation + section[2].offset, section[2].size);
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*(u32 *)0x1FFFFFF8 = (u32)firmLocation->arm11Entry;
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//Final jump to arm9 binary
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((void (*)())0x801B01C)();
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}
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