Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Make Hades DMA transfers work in polling mode with all interrupts

Browse Source 
disabled. This makes dumps to scsi work.
This commit is contained in:
leo 1997-04-06 12:42:44 +00:00
parent 79987d75ee
commit 9c9b9aefc9
1 changed files with 20 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
sys/arch/atari/dev/atari5380.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: atari5380.c,v 1.24 1997/03/30 21:08:30 leo Exp $ */
/* $NetBSD: atari5380.c,v 1.25 1997/04/06 12:42:44 leo Exp $ */
/*
* Copyright (c) 1995 Leo Weppelman.
@ -380,6 +380,12 @@ tt_poll_edma(SC_REQ *reqp)
return(0);
}
dmstat = GET_TT_REG(NCR5380_DMSTAT);
if ((machineid & ATARI_HADES) && (dmstat & SC_DMA_REQ)) {
ncr5380_drq_intr();
dmstat = GET_TT_REG(NCR5380_DMSTAT);
}
dmastat = SCSI_DMA->s_dma_ctrl;
if (dmstat & (SC_END_DMA|SC_BSY_ERR|SC_IRQ_SET))
break;
@ -467,7 +473,6 @@ tt_get_dma_result(SC_REQ *reqp, u_long *bytes_left)
}
static u_char *dma_ptr;
static int dbgflag = 3;
void
ncr5380_drq_intr()
{
@ -525,10 +530,21 @@ extern int *nofault;
SCSI_DMA->s_hdma_ctrl |= SDH_EOP;
}
else {
nofault = (int *) &faultbuf;
/*
* Set the bus-error bit
* Try to figure out if the byte-count was
* zero because there was no (more) data or
* because the dma_ptr is bogus.
*/
SCSI_DMA->s_hdma_ctrl |= SDH_BUSERR;
if (setjmp((label_t *) nofault)) {
/*
* Set the bus-error bit
*/
SCSI_DMA->s_hdma_ctrl |= SDH_BUSERR;
}
__asm __volatile ("tstb %0@(0)": : "a" (dma_ptr));
nofault = (int *)0;
}
/*