99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
/*
|
|
* firm.c
|
|
* by Reisyukaku
|
|
* Copyright (c) 2015 All Rights Reserved
|
|
*/
|
|
|
|
#include "firm.h"
|
|
#include "patches.h"
|
|
#include "memory.h"
|
|
#include "types.h"
|
|
#include "fs.h"
|
|
#include "emunand.h"
|
|
|
|
firmHeader *firmLocation = (firmHeader *)0x24000000;
|
|
const u32 firmSize = 0xF1000;
|
|
firmSectionHeader *section;
|
|
u32 emuOffset = 0;
|
|
u32 emuHeader = 0;
|
|
|
|
void loadFirm(void){
|
|
//Read FIRM from SD card and write to FCRAM
|
|
fileRead((u8*)firmLocation, "/rei/firmware.bin", firmSize);
|
|
section = firmLocation->section;
|
|
}
|
|
|
|
void loadSys(void){
|
|
memcpy((u8*)mpuCode, mpu, sizeof(mpu));
|
|
}
|
|
|
|
void loadEmu(void){
|
|
fileRead((u8*)emuCode, "/rei/emunand/emunand.bin", 0);
|
|
u32 *pos_offset = memsearch((u8*)emuCode, "NAND", 0x218, 4);
|
|
u32 *pos_header = memsearch((u8*)emuCode, "NCSD", 0x218, 4);
|
|
memcpy((void *)pos_offset, (void *)emuOffset, 4);
|
|
memcpy((void *)pos_header, (void *)emuHeader, 4);
|
|
|
|
//Add emunand hooks
|
|
memcpy((u8*)mpuCode, mpu, sizeof(mpu));
|
|
memcpy((u8*)emuHook2, eh2, sizeof(eh2));
|
|
memcpy((u8*)emuHook3, eh3, sizeof(eh3));
|
|
memcpy((u8*)emuHook4, eh4, sizeof(eh4));
|
|
}
|
|
|
|
void patchFirm(void){
|
|
|
|
//Part1: Get Emunand
|
|
if(getEmunand(&emuOffset, &emuHeader) == 1)
|
|
loadEmu();
|
|
else
|
|
loadSys();
|
|
|
|
//Part2: Disable signature checks
|
|
memcpy((u8*)patch1, p1, sizeof(p1));
|
|
memcpy((u8*)patch2, p2, sizeof(p2));
|
|
|
|
//Part3: Create arm9 thread
|
|
fileRead((u8*)threadCode, "/rei/thread/arm9.bin", 0);
|
|
memcpy((u8*)threadHook1, th1, sizeof(th1));
|
|
memcpy((u8*)threadHook2, th2, sizeof(th2));
|
|
}
|
|
|
|
void launchFirm(void){
|
|
//Set MPU
|
|
|
|
__asm__ (
|
|
"msr cpsr_c, #0xDF\n\t" //Set system mode, disable interrupts
|
|
"ldr r0, =0x10000035\n\t" //Memory area 0x10000000-0x18000000, enabled, 128MB
|
|
"ldr r4, =0x18000035\n\t" //Memory area 0x18000000-0x20000000, enabled, 128MB
|
|
"mcr p15, 0, r0, c6, c3, 0\n\t" //Set memory area 3 (0x10000000-0x18000000)
|
|
"mcr p15, 0, r4, c6, c4, 0\n\t" //Set memory area 4 (0x18000000-0x20000000)
|
|
"mrc p15, 0, r0, c2, c0, 0\n\t" //read data cacheable bit
|
|
"mrc p15, 0, r4, c2, c0, 1\n\t" //read inst cacheable bit
|
|
"mrc p15, 0, r1, c3, c0, 0\n\t" //read data writeable
|
|
"mrc p15, 0, r2, c5, c0, 2\n\t" //read data access permission
|
|
"mrc p15, 0, r3, c5, c0, 3\n\t" //read inst access permission
|
|
"orr r0, r0, #0x30\n\t"
|
|
"orr r4, r4, #0x30\n\t"
|
|
"orr r1, r1, #0x30\n\t"
|
|
"bic r2, r2, #0xF0000\n\t"
|
|
"bic r3, r3, #0xF0000\n\t"
|
|
"orr r2, r2, #0x30000\n\t"
|
|
"orr r3, r3, #0x30000\n\t"
|
|
"mcr p15, 0, r0, c2, c0, 0\n\t" //write data cacheable bit
|
|
"mcr p15, 0, r4, c2, c0, 1\n\t" //write inst cacheable bit
|
|
"mcr p15, 0, r1, c3, c0, 0\n\t" //write data writeable
|
|
"mcr p15, 0, r2, c5, c0, 2\n\t" //write data access permission
|
|
"mcr p15, 0, r3, c5, c0, 3\n\t" //write inst access permission
|
|
::: "r0", "r1", "r2", "r3", "r4"
|
|
);
|
|
|
|
//Copy firm partitions to respective memory locations
|
|
memcpy(section[0].address, (u8*)firmLocation + section[0].offset, section[0].size);
|
|
memcpy(section[1].address, (u8*)firmLocation + section[1].offset, section[1].size);
|
|
memcpy(section[2].address, (u8*)firmLocation + section[2].offset, section[2].size);
|
|
*(u32 *)0x1FFFFFF8 = (u32)firmLocation->arm11Entry;
|
|
|
|
//Final jump to arm9 binary
|
|
((void (*)())0x801B01C)();
|
|
} |