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Verify that NCR was mapped to uncached address.

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Submitted by:	wolf@kintaro.cologne.de <Wolfgang Stanglmeier>
This commit is contained in:
se 1995-02-14 22:48:01 +00:00
parent 3b9f3271d5
commit 9122f5be94
1 changed files with 33 additions and 3 deletions
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36
sys/pci/ncr.c
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@ -1,6 +1,6 @@
/**************************************************************************
**
** $Id: ncr.c,v 1.20 1995/02/10 13:24:52 se Exp $
** $Id: ncr.c,v 1.21 1995/02/14 06:20:03 phk Exp $
**
** Device driver for the NCR 53C810 PCI-SCSI-Controller.
**
@ -44,7 +44,7 @@
***************************************************************************
*/
#define NCR_PATCHLEVEL "pl11 95/02/09"
#define NCR_PATCHLEVEL "pl12 95/02/09"
#define NCR_VERSION (2)
#define MAX_UNITS (16)
@ -1228,7 +1228,7 @@ static void ncr_attach (pcici_t tag, int unit);
static char ident[] =
"\n$Id: ncr.c,v 1.20 1995/02/10 13:24:52 se Exp $\n";
"\n$Id: ncr.c,v 1.21 1995/02/14 06:20:03 phk Exp $\n";
u_long ncr_version = NCR_VERSION
+ (u_long) sizeof (struct ncb)
@ -6396,9 +6396,39 @@ static int ncr_scatter
**==========================================================
*/
static int ncr_regtest (struct ncb* np)
{
register volatile u_long data, *addr;
#ifndef NCR_IOMAPPED
/*
** ncr registers may NOT be cached.
** write 0xffffffff to a read only register area,
** and try to read it back.
*/
addr = (u_long*) &np->reg->nc_dstat;
data = 0xffffffff;
*addr= data;
data = *addr;
#if 1
if (data == 0xffffffff) {
#else
if ((data & 0xe2f0fffd) != 0x02000080) {
#endif
printf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
(unsigned) data);
return (0x10);
};
return (0);
#endif
}
static int ncr_snooptest (struct ncb* np)
{
u_long ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc, err=0;
#ifndef NCR_IOMAPPED
err |= ncr_regtest (np);
if (err) return (err);
#endif
/*
** init
*/