static uae_u32 REGPARAM2 gayle_wget (uaecptr addr)
{
struct ide_hdf *ide = NULL;
int ide_reg;
uae_u32 v;
#ifdef NCR
if (is_a4000t_scsi() && (addr & (0xffff - 1)) == 0x3000)
return 0xffff; // NCR DIP BANK
if (isdataflyerscsiplus(addr, &v, 2)) {
return v;
}
if (isa4000t(&addr)) {
if (addr >= NCR_OFFSET) {
addr &= NCR_MASK;
v = (ncr710_io_bget_a4000t(addr) << 8) | ncr710_io_bget_a4000t(addr + 1);
}
return v;
}
#endif
ide_reg = get_gayle_ide_reg (addr, &ide);
if (ide_reg == IDE_DATA) {
v = ide_get_data (ide);
if (GAYLE_LOG > 4)
write_log(_T("IDE_DATA_WORD %08X=%04X PC=%X\n"), addr, v & 0xffff, M68K_GETPC);
return v;
}
v = gayle_bget (addr) << 8;
v |= gayle_bget (addr + 1);
return v;
}
/*
* read from the IDE device
*/
static LONG ide_read(UBYTE cmd,UWORD ifnum,UWORD dev,ULONG sector,UWORD count,UBYTE *buffer,BOOL need_byteswap)
{
volatile struct IDE *interface = ide_interface + ifnum;
struct IFINFO *info = ifinfo + ifnum;
UWORD spi;
UBYTE status1, status2;
LONG rc = 0L;
KDEBUG(("ide_read(0x%02x, %u, %u, %lu, %u, 0x%08lx, %d)\n", cmd, ifnum, dev, sector, count, (ULONG)buffer, need_byteswap));
if (ide_select_device(interface,dev) < 0)
return EREADF;
/*
* if READ SECTOR and MULTIPLE MODE, set cmd & spi accordingly
*/
spi = 1;
if ((cmd == IDE_CMD_READ_SECTOR)
&& (info->dev[dev].options & MULTIPLE_MODE_ACTIVE)) {
cmd = IDE_CMD_READ_MULTIPLE;
spi = info->dev[dev].spi;
KDEBUG(("spi=%u\n", spi));
}
ide_rw_start(interface,dev,sector,count,cmd);
/*
* each iteration of this loop handles one DRQ block
*/
while (count > 0)
{
UWORD numsecs;
ULONG xferlen;
if (wait_for_not_BSY(interface,XFER_TIMEOUT))
return EREADF;
status1 = IDE_READ_ALT_STATUS();/* alternate status, ignore */
status1 = IDE_READ_STATUS(); /* status, clear pending interrupt */
numsecs = (count>spi) ? spi : count;
xferlen = (ULONG)numsecs * SECTOR_SIZE;
rc = E_OK;
if (status1 & IDE_STATUS_DRQ)
ide_get_data(interface,buffer,xferlen,need_byteswap);
else rc = EREADF;
if (status1 & (IDE_STATUS_DF | IDE_STATUS_ERR))
rc = EREADF;
if (rc)
break;
buffer += xferlen;
count -= numsecs;
}
status2 = IDE_READ_ALT_STATUS(); /* alternate status, ignore */
status2 = IDE_READ_STATUS(); /* status, clear pending interrupt */
if (status2 & (IDE_STATUS_BSY|IDE_STATUS_DF|IDE_STATUS_DRQ|IDE_STATUS_ERR))
rc = EREADF;
return rc;
}
