Re: port-i386/52266: Double fault early in boot with Transmeta Crusoe CPU

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

The following reply was made to PR port-i386/52266; it has been noted by GNATS.

From: "John D. Baker" <jdbaker%mylinuxisp.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: port-i386/52266: Double fault early in boot with Transmeta Crusoe
 CPU
Date: Mon, 26 Jun 2017 09:12:05 -0500 (CDT)

 A reported here:
 
   http://mail-index.netbsd.org/current-users/2017/06/24/msg031962.html
 
 this problem also affects the i486-class CPU found in the Soekris net4501.
 A kernel built with sources from 2017.05.23.08.54.37 boots and runs
 fine.  A kernel built with sources from 2017.05.23.08.54.40 fails
 immediately after printing the segment sizes (and any module load
 messages) with:
 
 fatal privileged instruction fault in sufatal double fault in supervisor mode
 trap type 13 code 0xc0117238 eip 0x8 cs 0x246 eflags 0xc017a4d1 cr2 0 ilevel 0x8 esp 0xc0405f20
 curlwp 0xc0413ba0 pid 0 lid 1 lowest kstack 0xc058c2c0
 kernel: user trap double fault, code=0
 Stopped in pid 0.1 (system) at  8:      invalid address
 db{0}> 
 
 Attempting 'bt' immediately reboots the machine.
 
 Output of 'cpuctl identify 0' under last working kernel:
 
 cpu0: highest basic info 00000001
 cpu0: AMD Am5x86 W/B 133/160 (486-class)
 cpu0: family 0x4 model 0xf stepping 0x4 (id 0x4f4)
 cpu0: features 0x1<FPU>
 cpu0: Initial APIC ID 0
 
 "/var/run/dmesg.boot" with last working kernel:
 
 Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
     2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
     The NetBSD Foundation, Inc.  All rights reserved.
 Copyright (c) 1982, 1986, 1989, 1991, 1993
     The Regents of the University of California.  All rights reserved.
 
 NetBSD 7.99.72 (NET4501) #3: Sun Jun 25 23:25:56 CDT 2017
 	sysop%plex760.technoskunk.fur@localhost:/r0/build/nbsd-tst/obj/i386/sys/arch/i386/compile/NET4501
 total memory = 65148 KB
 avail memory = 59352 KB
 timecounter: Timecounters tick every 10.000 msec
 timecounter: Timecounter "i8254" frequency 1189200 Hz quality 100
 Generic PC
 mainbus0 (root)
 cpu0 at mainbus0
 cpu0: AMD 486-class, id 0x4f4
 cpu0: package 0, core 0, smt 0
 elansc0 at mainbus0 bus 0: AMD Elan SC520 System Controller
 elansc0: product 0 stepping 1.1, CPU clock 133MHz
 gpio0 at elansc0: 32 pins
 pci0 at elansc0 bus 0: configuration mode 1
 pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
 vendor 1022 product 3000 (host bridge) at pci0 dev 0 function 0 not configured
 sip0 at pci0 dev 18 function 0: NatSemi DP83815 10/100 Ethernet, rev 00
 sip0: interrupting at irq 10
 sip0: Ethernet address xx:xx:xx:xx:xx:xx
 nsphyter0 at sip0 phy 0: DP83815 10/100 media interface, rev. 1
 nsphyter0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
 sip1 at pci0 dev 19 function 0: NatSemi DP83815 10/100 Ethernet, rev 00
 sip1: interrupting at irq 11
 sip1: Ethernet address xx:xx:xx:xx:xx:xx
 nsphyter1 at sip1 phy 0: DP83815 10/100 media interface, rev. 1
 nsphyter1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
 sip2 at pci0 dev 20 function 0: NatSemi DP83815 10/100 Ethernet, rev 00
 sip2: interrupting at irq 5
 sip2: Ethernet address xx:xx:xx:xx:xx:xx
 nsphyter2 at sip2 phy 0: DP83815 10/100 media interface, rev. 1
 nsphyter2: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
 isa0 at mainbus0
 com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
 com0: console
 com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
 wdc0 at isa0 port 0x1f0-0x1f7 irq 14
 atabus0 at wdc0 channel 0
 timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
 wd0 at atabus0 drive 0
 wd0: <ELITE PRO CF CARD 8GB>
 wd0: drive supports 1-sector PIO transfers, LBA addressing
 wd0: 7647 MB, 15538 cyl, 16 head, 63 sec, 512 bytes/sect x 15662304 sectors
 wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
 boot device: sip0
 root on sip0
 nfs_boot: trying DHCP/BOOTP
 nfs_boot: DHCP next-server: a.b.c.d
 nfs_boot: my_name=net4501d
 nfs_boot: my_domain=technoskunk.fur
 nfs_boot: my_addr=e.f.g.h
 nfs_boot: my_mask=m.n.o.p
 nfs_boot: gateway=r.p.q.t
 root on a.b.c.d:/r0/diskless/net4501d
 root file system type: nfs
 kern.module.path=/stand/i386/7.99.72/modules
 
 -- 
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