64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
/*
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* emunand.c
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* by Reisyukaku / Aurora Wright
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* Copyright (c) 2016 All Rights Reserved
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*/
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#include "emunand.h"
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#include "memory.h"
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#include "fatfs/sdmmc/sdmmc.h"
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void getEmunandSect(u32 *off, u32 *head, u32 emuNAND){
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u8 *const temp = (u8 *)0x24300000;
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u32 nandSize = getMMCDevice(0)->total_size;
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u32 nandOffset = emuNAND == 1 ? 0 :
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(nandSize > 0x200000 ? 0x400000 : 0x200000);
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//Check for Gateway emuNAND
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if(sdmmc_sdcard_readsectors(nandOffset + nandSize, 1, temp) == 0){
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if(*(u32 *)(temp + 0x100) == NCSD_MAGIC){
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*off = nandOffset;
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*head = nandOffset + nandSize;
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}
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//Check for RedNAND
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else if(sdmmc_sdcard_readsectors(nandOffset + 1, 1, temp) == 0){
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if(*(u32 *)(temp + 0x100) == NCSD_MAGIC){
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*off = nandOffset + 1;
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*head = nandOffset + 1;
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}
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//Fallback to the first emuNAND if there's no second one
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else if(emuNAND == 2) getEmunandSect(off, head, 1);
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}
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}
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}
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u32 getSDMMC(void *pos, u32 size){
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//Look for struct code
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const u8 pattern[] = {0x21, 0x20, 0x18, 0x20};
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const u8 *off = (u8 *)memsearch(pos, pattern, size, 4) - 1;
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return *(u32 *)(off + 0x0A) + *(u32 *)(off + 0x0E);
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}
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void getEmuRW(void *pos, u32 size, u32 *readOff, u32 *writeOff){
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//Look for read/write code
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const u8 pattern[] = {0x1E, 0x00, 0xC8, 0x05};
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*writeOff = (u32)memsearch(pos, pattern, size, 4) - 6;
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*readOff = (u32)memsearch((void *)(*writeOff - 0x1000), pattern, 0x1000, 4) - 6;
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}
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u32 *getMPU(void *pos, u32 size){
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//Look for MPU pattern
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const u8 pattern[] = {0x03, 0x00, 0x24, 0x00};
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return (u32 *)memsearch(pos, pattern, size, 4);
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}
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void *getEmuCode(u8 *pos, u32 size, u8 *proc9Offset){
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const u8 pattern[] = {0x00, 0xFF, 0xFF, 0xFF};
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//Looking for the last free space before Process9
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return (u8 *)memsearch(pos, pattern, size - (size - (u32)(proc9Offset - pos)), 4) + 0xD;
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} |