Date: Sun, 10 Apr 1994 01:31:34 +0200 (MET DST) From: jan@todonix.ping.de (Jan Wedekind) To: bugs@FreeBSD.org Subject: Cyclades driver bug report Message-ID: <m0ppmUx-000GnLC@todonix.ping.de>
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Hello,
we bought and installed 2 Cyclades Cyclom 8Yo cards,
using FreeBSD-2.0 SNAP 950322.
we found the following problems:
a) the driver only works for one installed card because
of global variables for the IO-Memory and the internal structure
(is there anybody else working on a further version ?)
b) the driver itself (or some other parts of the kernel)
are buggy because of the following reason:
configuration: (with options for KTRACE, DDB and DIAGNOSTIC)
device cy0 at isa? tty iomem 0xd4000 iosiz 0x2000 vector cyintr
(so the cyclom_base has been set to 0xf00d4000)
the kernel found the card, but when trying to use it, to configure
a modem with kermit, we got a kernel trap, reason 'page not found':
virtaddr 0x4
reason / type supervisor read, page not present
at: 0x8:f01a8dd9
base 0, limit 0xffff, type 0x1b
DPL 0, ...
type 12 trap at
_cytimeout+0x2d
movl 0x4(%ecx), (%esi)
some of the 'show reg' output:
cs mmclose+0x4
ds isadmarangecheck+0x50
cax cy_tty+0x78
we testet in two computer's, a PCI 486DX4-100 with an ASUS SP3G board,
and a 486DX2-66 with VL-Bus architecture. Both showed the same
results.
Any suggestions ?
Thanks,
Jan
PS: the error occurs at the following code (see /sys/i386/isa/cy.c)
/* upper level character processing routine */
void
cytimeout(void *ptr)
{
int unit;
timeout_scheduled = 0;
#ifdef CyDebug
cy_timeouts++;
#endif
/* check each port in turn */
for (unit = 0; unit < NCY*PORTS_PER_CYCLOM; unit++) {
struct cy *ip = info[unit];
#ifndef TxBuffer
struct tty *tp = ip->tty;
#endif
****
i guess here the trap occurs (see assembler input below)
this would would mean, that the info struct hasn't been initialized!
***
/* ignore anything that is not open */
if (!ip->tty)
continue;
/*
* any received chars to handle? (doesn't matter if intr routine
* kicks in while we're testing this)
*/
if (ip->rx_buf->free != CY_RX_BUF_SIZE)
service_upper_rx(unit);
[continued]
the assembler input:
.globl _cytimeout
.type _cytimeout,@function
_cytimeout:
pushl %ebp
movl %esp,%ebp
subl $24,%esp
pushl %edi
pushl %esi
pushl %ebx
movb $0,_timeout_scheduled
incl _cy_timeouts
movl $0,-8(%ebp)
.align 2,0x90
L157:
movl -8(%ebp),%ecx
movl _info(,%ecx,4),%ecx
movl %ecx,-12(%ebp)
--> movl 4(%ecx),%esi <-- here the page not present trap occurs
testl %esi,%esi
je L156
movl 48(%ecx),%eax
cmpl $256,4(%eax)
je L159
movl %esi,-16(%ebp)
movl %eax,-20(%ebp)
#APP
cli
#NO_APP
movl 8(%eax),%eax
movl %eax,48(%ecx)
#APP
sti
#NO_APP
--
PING e.V. Jan Wedekind (Kassenwart) jan@ping.de
Emil-Figge-Str. 85 Lindemannstr. 12 kasse@ping.de
44227 Dortmund 44137 Dortmund vorstand@ping.de
Tel.: noch nicht bek. Tel.: +49 (231) 13 44 04 info@ping.de
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