modules/hdd/ps2hdd/journal.c

   1 /*
   2 # _____     ___ ____     ___ ____
   3 #  ____|   |    ____|   |        | |____|
   4 # |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
   5 #-----------------------------------------------------------------------
   6 # Copyright 2001-2004, ps2dev - http://www.ps2dev.org
   7 # Licenced under Academic Free License version 2.0
   8 # Review ps2sdk README & LICENSE files for further details.
   9 #
  10 # $Id: journal.c 577 2004-09-14 14:41:46Z pixel $
  11 # APA journal related routines
  12 */
  13
  14 #include "hdd.h"
  15
  16 //  Globals
  17 apa_journal_t journalBuf;
  18
  19
  20 int journalFlush(u32 device)
  21 {// this write any thing that in are journal buffer :)
  22         if(atadFlushCache(device))
  23                 return -EIO;
  24         if(atadDmaTransfer(device, &journalBuf, APA_SECTOR_APAL, 1, ATAD_MODE_WRITE))
  25                 return -EIO;
  26         if(atadFlushCache(device))
  27                 return -EIO;
  28         return 0;
  29 }
  30
  31 int journalReset(u32 device)
  32 {
  33         memset(&journalBuf, 0, sizeof(apa_journal_t));
  34         journalBuf.magic=APAL_MAGIC;
  35         return journalFlush(device);
  36 }
  37
  38 int journalWrite(apa_cache *clink)
  39 {
  40         clink->header->checksum=journalCheckSum(clink->header);
  41         if(atadDmaTransfer(clink->device, clink->header,
  42                 (journalBuf.num << 1)+APA_SECTOR_APAL_HEADERS, 2, ATAD_MODE_WRITE))
  43                         return -EIO;
  44         journalBuf.sectors[journalBuf.num]=clink->sector;
  45         journalBuf.num++;
  46         return 0;
  47 }
  48
  49 int journalResetore(u32 device)
  50 {       // copys apa headers from apal to apa system
  51         int i;
  52         u32 sector;
  53         apa_cache *clink;
  54
  55         dprintf1("ps2hdd: checking log...\n");
  56         if(atadDmaTransfer(device, &journalBuf, APA_SECTOR_APAL, sizeof(apa_journal_t)/512, ATAD_MODE_READ)){
  57                 journalReset(device);
  58                 return -EIO;
  59         }
  60         if(journalBuf.magic==APAL_MAGIC)
  61         {
  62                 if(journalBuf.num==0)
  63                         return 0;
  64                 clink=cacheGetFree();
  65                 for(i=0, sector=APA_SECTOR_APAL_HEADERS;i<journalBuf.num;i++, sector+=2)
  66                 {
  67                         if(atadDmaTransfer(device, clink->header, sector, 2, ATAD_MODE_READ))
  68                                 break;
  69                         if(atadDmaTransfer(device, clink->header, journalBuf.sectors[i], 2, ATAD_MODE_WRITE))
  70                                 break;
  71                 }
  72                 cacheAdd(clink);
  73                 return journalReset(device);// only do if journal..
  74         }
  75         memset(&journalBuf, 0, sizeof(apa_journal_t));// safe e
  76         journalBuf.magic=APAL_MAGIC;
  77         return 0;//-EINVAL;
  78 }