mirror of
https://github.com/project-slippi/Nintendont.git
synced 2025-10-06 00:22:40 +02:00
afcfa4b653
-completely restructured how internal wii vc titles get read in, again hopefully it didnt break anything
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
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apploader.c for Nintendont (Loader)
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Copyright (C) 2014 FIX94
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation version 2.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "cache.h"
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#include "utils.h"
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#include "apploader.h"
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#include "dip.h"
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typedef int (*app_main)(char **dst, u32 *size, u32 *offset);
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typedef void (*app_init)(int (*report)(const char *fmt, ...));
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typedef void *(*app_final)();
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typedef void (*app_entry)(void (**init)(int (*report)(const char *fmt, ...)), int (**main)(), void *(**final)());
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static u8 *appldr = (u8*)0x81200000;
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static struct _TGCInfo *TGCInfo = (struct _TGCInfo*)0x930031E0;
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#define APPLDR_OFFSET 0x2440
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#define APPLDR_CODE 0x2460
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static int noprintf( const char *str, ... ) { return 0; };
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void PrepareTGC(u32 Offset)
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{
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if(TGCInfo->isTGC == 0)
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return;
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if(Offset == TGCInfo->doloffset || Offset == TGCInfo->fstoffset)
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TGCInfo->tgcoffset = 0; /* we can stop the manual offset correction */
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}
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void ParseTGC(char *Data, u32 Length, u32 Offset)
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{
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if(TGCInfo->isTGC == 0)
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return;
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if(Offset == 0x420) /* update internal gcm header with the tgc header */
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{
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*(vu32*)(Data+0x00) = TGCInfo->doloffset;
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*(vu32*)(Data+0x04) = TGCInfo->fstoffset;
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*(vu32*)(Data+0x08) = TGCInfo->fstsize;
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*(vu32*)(Data+0x0C) = TGCInfo->fstsize;
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*(vu32*)(Data+0x34) = TGCInfo->userpos;
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*(vu32*)(Data+0x38) = 0x57058000L - (TGCInfo->userpos);
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sync_after_write(Data, Length);
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}
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else if(Offset == TGCInfo->fstoffset) /* update internal gcm fst with correct tgc positions */
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{
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char *FSTable = Data;
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u32 FSTEnt = *(u32*)(FSTable+0x08);
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FST *fst = (FST *)(FSTable);
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u32 i;
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for(i = 1; i < FSTEnt; ++i)
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{
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if(fst[i].Type == 0) /* update file offset */
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fst[i].FileOffset -= TGCInfo->fstupdate;
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}
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sync_after_write(Data, Length);
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}
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}
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/* Thanks Tinyload */
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static struct
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{
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char revision[16];
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void *entry;
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s32 size;
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s32 trailersize;
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s32 padding;
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} apploader_hdr ALIGNED(32);
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u32 Apploader_Run()
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{
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app_entry appldr_entry;
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app_init appldr_init;
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app_main appldr_main;
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app_final appldr_final;
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char *dst;
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u32 len, offset;
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sync_before_read(TGCInfo, sizeof(struct _TGCInfo));
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/* Read apploader header */
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DVDLowRead(&apploader_hdr, 0x20, TGCInfo->tgcoffset + APPLDR_OFFSET);
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/* Calculate apploader length */
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u32 appldr_len = apploader_hdr.size + apploader_hdr.trailersize;
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/* Read apploader code */
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DVDLowRead(appldr, appldr_len, TGCInfo->tgcoffset + APPLDR_CODE);
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/* Flush into memory */
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sync_before_exec(appldr, appldr_len);
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/* Set basic information */
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*(vu32*)0x800000F8 = 243000000; // Bus Clock Speed
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*(vu32*)0x800000FC = 729000000; // CPU Clock Speed
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/* Set apploader entry function */
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appldr_entry = apploader_hdr.entry;
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/* Call apploader entry */
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appldr_entry(&appldr_init, &appldr_main, &appldr_final);
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/* Initialize apploader */
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appldr_init(noprintf);
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while(appldr_main(&dst, &len, &offset))
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{
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/* Read data from DVD */
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PrepareTGC( offset );
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DVDLowRead( dst, len, offset + TGCInfo->tgcoffset );
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ParseTGC( dst, len, offset );
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}
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/* Set entry point from apploader */
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return (u32)appldr_final();
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}
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