65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/*
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* emunand.c
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* by Reisyukaku
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* Copyright (c) 2015 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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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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//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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//Check if a RedNAND is present
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else if(sdmmc_sdcard_readsectors(1, 1, temp) == 0){
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if(*(u32 *)(temp + 0x100) != NCSD_MAGIC)
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*head = 0;
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}
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}
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}
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void getSDMMC(void *pos, u32 *off, u32 size){
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//Look for struct code
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const unsigned char pattern[] = {0x21, 0x20, 0x18, 0x20};
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*off = (u32)memsearch(pos, pattern, size, 4) - 1;
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//Get DCD values
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u8 buf[4];
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u32 addr = 0,
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additive = 0,
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p;
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memcpy(buf, (void *)(*off+0x0A), 4);
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for (p = 0; p < 4; p++) addr |= ((u32) buf[p]) << (8 * p);
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memcpy(buf, (void *)(*off+0x0E), 4);
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for (p = 0; p < 4; p++) additive |= ((u32) buf[p]) << (8 * p);
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//Return result
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*off = addr + additive;
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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 unsigned char 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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void getMPU(void *pos, u32 *off, u32 size){
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//Look for MPU pattern
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const unsigned char pattern[] = {0x03, 0x00, 0x24, 0x00};
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*off = (u32)memsearch(pos, pattern, size, 4);
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} |