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Buffer IDE multiple-sector read commands.

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This commit is contained in:
SarahW 2017-06-17 08:03:35 +01:00
commit 59b5cf50dd
1 changed files with 44 additions and 12 deletions
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56
src/ide.c
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@ -261,6 +261,9 @@ typedef struct IDE
uint32_t lba_addr;
int skip512;
int blocksize, blockcount;
uint8_t sector_buffer[256*512];
int do_initial_read;
int sector_pos;
} IDE;
IDE ide_drives[4];
@ -978,6 +981,7 @@ void writeide(int ide_board, uint16_t addr, uint8_t val)
timer_process();
idecallback[ide_board]=200*IDE_TIME;
timer_update_outstanding();
ide->do_initial_read = 1;
return;
case WIN_WRITE_MULTIPLE:
@ -1365,14 +1369,24 @@ void callbackide(int ide_board)
ide_set_signature(ide);
goto abort_cmd;
}
addr = ide_get_sector(ide) * 512;
if (ide->do_initial_read)
{
ide->do_initial_read = 0;
ide->sector_pos = 0;
addr = ide_get_sector(ide) * 512;
fseeko64(ide->hdfile, addr, SEEK_SET);
if (ide->secount)
fread(ide->sector_buffer, ide->secount*512, 1, ide->hdfile);
else
fread(ide->sector_buffer, 256*512, 1, ide->hdfile);
}
memcpy(ide->buffer, &ide->sector_buffer[ide->sector_pos*512], 512);
ide->sector_pos++;
// pclog("Read %i %i %i %08X\n",ide.cylinder,ide.head,ide.sector,addr);
/* if (ide.cylinder || ide.head)
{
fatal("Read from other cylinder/head");
}*/
fseeko64(ide->hdfile, addr, SEEK_SET);
fread(ide->buffer, 512, 1, ide->hdfile);
ide->pos=0;
ide->atastat = DRQ_STAT | READY_STAT | DSC_STAT;
// pclog("Read sector callback %i %i %i offset %08X %i left %i %02X\n",ide.sector,ide.cylinder,ide.head,addr,ide.secount,ide.spt,ide.atastat[ide.board]);
@ -1387,18 +1401,27 @@ void callbackide(int ide_board)
if (IDE_DRIVE_IS_CDROM(ide)) {
goto abort_cmd;
}
addr = ide_get_sector(ide) * 512;
fseeko64(ide->hdfile, addr, SEEK_SET);
fread(ide->buffer, 512, 1, ide->hdfile);
if (ide->do_initial_read)
{
ide->do_initial_read = 0;
ide->sector_pos = 0;
addr = ide_get_sector(ide) * 512;
fseeko64(ide->hdfile, addr, SEEK_SET);
if (ide->secount)
fread(ide->sector_buffer, ide->secount*512, 1, ide->hdfile);
else
fread(ide->sector_buffer, 256*512, 1, ide->hdfile);
}
ide->pos=0;
if (ide_bus_master_read_sector)
{
if (ide_bus_master_read_sector(ide_board, (uint8_t *)ide->buffer))
idecallback[ide_board]=6*IDE_TIME; /*DMA not performed, try again later*/
if (ide_bus_master_read_sector(ide_board, &ide->sector_buffer[ide->sector_pos*512]))
idecallback[ide_board]=6*IDE_TIME; /*DMA not performed, try again later*/
else
{
/*DMA successful*/
ide->sector_pos++;
ide->atastat = DRQ_STAT | READY_STAT | DSC_STAT;
ide->secount = (ide->secount - 1) & 0xff;
@ -1423,10 +1446,19 @@ void callbackide(int ide_board)
if (IDE_DRIVE_IS_CDROM(ide)) {
goto abort_cmd;
}
addr = ide_get_sector(ide) * 512;
// pclog("Read multiple from %08X %i (%i) %i\n", addr, ide->blockcount, ide->blocksize, ide->secount);
fseeko64(ide->hdfile, addr, SEEK_SET);
fread(ide->buffer, 512, 1, ide->hdfile);
if (ide->do_initial_read)
{
ide->do_initial_read = 0;
ide->sector_pos = 0;
addr = ide_get_sector(ide) * 512;
fseeko64(ide->hdfile, addr, SEEK_SET);
if (ide->secount)
fread(ide->sector_buffer, ide->secount*512, 1, ide->hdfile);
else
fread(ide->sector_buffer, 256*512, 1, ide->hdfile);
}
memcpy(ide->buffer, &ide->sector_buffer[ide->sector_pos*512], 512);
ide->sector_pos++;
ide->pos=0;
ide->atastat = DRQ_STAT | READY_STAT | DSC_STAT;
if (!ide->blockcount)// || ide->secount == 1)