diff options
| author | se <se@FreeBSD.org> | 1995-03-03 16:44:33 +0000 |
|---|---|---|
| committer | se <se@FreeBSD.org> | 1995-03-03 16:44:33 +0000 |
| commit | a12e751d75a409c51dd9cac65fca6ad8bb0d9a87 (patch) | |
| tree | 7d8fb691c81cc542b0706070804c5b3e5f324e3c /sys/pci | |
| parent | b34d74eaf3ae0ce24d6a2321704983cd9441dac9 (diff) | |
| download | FreeBSD-src-a12e751d75a409c51dd9cac65fca6ad8bb0d9a87.zip FreeBSD-src-a12e751d75a409c51dd9cac65fca6ad8bb0d9a87.tar.gz | |
Reduce burst length to 4 DWORDs for now, since there seem to
be 486 chip sets that can't tolerate bursts > cache line size.
This should really made dependent on the particular buggy
chip sets, but for now we'll play safe ...
Diffstat (limited to 'sys/pci')
| -rw-r--r-- | sys/pci/ncr.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/sys/pci/ncr.c b/sys/pci/ncr.c index e155b80..0d5f8d7 100644 --- a/sys/pci/ncr.c +++ b/sys/pci/ncr.c @@ -1,6 +1,6 @@ /************************************************************************** ** -** $Id: ncr.c,v 1.27 1995/02/25 17:34:03 se Exp $ +** $Id: ncr.c,v 1.28 1995/02/27 17:10:20 se Exp $ ** ** Device driver for the NCR 53C810 PCI-SCSI-Controller. ** @@ -1254,7 +1254,7 @@ static void ncr_attach (pcici_t tag, int unit); static char ident[] = - "\n$Id: ncr.c,v 1.27 1995/02/25 17:34:03 se Exp $\n"; + "\n$Id: ncr.c,v 1.28 1995/02/27 17:10:20 se Exp $\n"; u_long ncr_version = NCR_VERSION + (u_long) sizeof (struct ncb) @@ -4416,10 +4416,11 @@ void ncr_init (ncb_p np, char * msg, u_long code) OUTB (nc_scntl0, 0xca ); /* full arb., ena parity, par->ATN */ OUTB (nc_scntl1, 0x00 ); /* odd parity, and remove CRST!! */ OUTB (nc_scntl3, np->rv_scntl3);/* timing prescaler */ - OUTB (nc_scid , RRE|np->myaddr);/* host adapter SCSI address */ + OUTB (nc_scid , RRE|np->myaddr);/* host adapter SCSI address */ OUTW (nc_respid, 1ul<<np->myaddr);/* id to respond to */ OUTB (nc_istat , SIGP ); /* Signal Process */ - OUTB (nc_dmode , 0xc0 ); /* Burst length = 16 transfer */ +/* OUTB (nc_dmode , 0xc0 );*/ /* Burst length = 16 DWORDs */ + OUTB (nc_dmode , 0x40 ); /* Burst length = 4 DWORDs */ OUTB (nc_dcntl , NOCOM ); /* no single step mode, protect SFBR*/ OUTB (nc_ctest4, 0x08 ); /* enable master parity checking */ OUTB (nc_stest2, EXT ); /* Extended Sreq/Sack filtering */ |
