Re: port-sparc64/46461: Sun E450 drops to DDB on boot of 6.0_BETA

[christos%zoulas.com@localhost (Christos Zoulas)]

The following reply was made to PR port-sparc64/46461; it has been noted by 
GNATS.

From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%NetBSD.org@localhost, 
port-sparc64-maintainer%netbsd.org@localhost, 
        gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Cc: 
Subject: Re: port-sparc64/46461: Sun E450 drops to DDB on boot of 6.0_BETA
Date: Thu, 17 May 2012 18:44:50 -0400

 On May 17,  9:30pm, he%NetBSD.org@localhost (he%NetBSD.org@localhost) wrote:
 -- Subject: port-sparc64/46461: Sun E450 drops to DDB on boot of 6.0_BETA
 
 | >Number:         46461
 | >Category:       port-sparc64
 | >Synopsis:       Sun E450 drops to DDB on boot of 6.0_BETA
 | >Confidential:   no
 | >Severity:       serious
 | >Priority:       medium
 | >Responsible:    port-sparc64-maintainer
 | >State:          open
 | >Class:          sw-bug
 | >Submitter-Id:   net
 | >Arrival-Date:   Thu May 17 21:30:00 +0000 2012
 | >Originator:     Havard Eidnes
 | >Release:        NetBSD 6.0_BETA
 | >Organization:
 |      None
 | >Environment:
 | System: NetBSD torbidinsu.urc.uninett.no 6.0_BETA NetBSD 6.0_BETA 
(TORBIDINSU) #0: Thu May 17 17:55:31 CEST 2012 
he%torbidinsu.urc.uninett.no@localhost:/usr/obj/sys/arch/sparc64/compile/TORBIDINSU
 sparc64
 | Architecture: sparc64
 | Machine: sparc64
 | >Description:
 |      Attempting to upgrade from 5.99.38 to 6.0_BETA, I notice that
 |      this E450 now drops to DDB during the autoconf phase.
 | 
 |      In particular, it gets this far:
 | 
 | psycho4 at mainbus0 addr 0xfff36000
 | psycho4: SUNW,psycho: impl 0, version 4: ign 180 bus range 0 to 0; PCI bus 0
 | pci4 at psycho4
 | pm2fb0 at pci4 dev 4 function 0: 3D Labs GLINT Permedia 2V (rev. 0x01)
 | pm2fb0: 8 MB aperture at 0x00800000
 | text_access_fault: pc=0 va=0
 | kernel trap 64: +fast instruction access MMU miss
 | Stopped in pid 0.1 (system) at  0:      undefined
 | db{0}: tra
 | config_attach_loc(6d3dc40, 1c080e8, 1, 2005428, 0, 1387c00) at 
netbsd:config_attach_loc+0x1a0
 | pci_probe_device(6dbc000, f009e59000002000, 0, 93d3d, ff00, 2005490) at 
netbsd:pci_probe_device+0x448
 | sparc64_pci_enumerate_bus(6dbc000, 174cdd0, 0, 21, 1c75c00, 179d800) at 
netbsd:sparc64_pci_enumerate_bus+0x2e8
 | pcirescan(6dbc000, 1791f18, 174cdd0, 17f6ee8, 490, 6d30137) at 
netbsd:pcirescan+0x4c
 | pciattach(1, 6d30100, 20058a0, 1cb2950, 1791c00, 5ddb680) at 
netbsd:pciattach+0x15c
 | config_attach_loc(6d30100, 1c07848, 1, 20058a0, 0, 13a82a0) at 
netbsd:config_attach_loc+0x1a0
 | psycho_attach(5b41200, 6d30400, 2005ab0, 1cb2950, 1791c00, 200592c) at 
netbsd:psycho_attach+0x4ec
 | config_attach_loc(6d30400, 1c077b8, 1, 2005ab0, 0, 1093020) at 
netbsd:config_attach_loc+0x1a0
 | mainbus_attach(0, 5b41200, 0, 1cb2950, 179d800, 1093000) at 
netbsd:mainbus_attach+0x4a8
 | config_attach_loc(5b41200, 1c07308, 1, 0, 0, 7) at 
netbsd:config_attach_loc+0x1a0
 | cpu_configure(17bfc00, 12a7420, 0, 5b2df80, 35, 1c09c00) at 
netbsd:cpu_configure+0x20c
 | main(0, 1226320, fff7fa80, f0075a4c, fffffffff00874a0, ff00) at 
netbsd:main+0x314
 | cpu_initialize(f0075a4c, 0, 10fc00, fff7fd00, 10e9d8, fff7fe00) at 
netbsd:cpu_initialize+0xe8
 | db{0}: 
 |      
 |      NetBSD 5.99.38 prints this at this point, and continues:
 | 
 | psycho4 at mainbus0 addr 0xfff36000
 | psycho4: SUNW,psycho: impl 0, version 4: ign 180 bus range 0 to 0; PCI bus 0
 | pci4 at psycho4
 | pm2fb0 at pci4 dev 4 function 0: 3D Labs GLINT Permedia 2V
 | pm2fb0: no width property
 | psycho5 at mainbus0 addr 0xfff48000
 | 
 |      This tends to point to the pm2fb0 driver, 
 | 
 |      Why it said "no width property" in 5.99.38 and then suddenly
 |      it finds it in 6.0_BETA will excercise the latter parts of
 |      pm2fb_attach().
 | 
 |      I should perhaps note that the serial port is the console, so
 |      the pm2fb0 isn't, this determines the branch in the is_console
 |      test.  The o7 register points to that, at least:
 | 
 | db{0}: show reg
 | ...
 | pc          0
 | ...
 | o7          1397648     pm2fb_attach+0x748
 | ...
 | 
 |      That's the only register value which decodes to a symbol+offset.
 | 
 |      A dmesg from 5.99.38 will be submitted as a comment after this
 |      initial submission.
 | 
 | >How-To-Repeat:
 |      Try to boot a Sun E450 with graphics card but not console on
 |      graphics, watch it drop to DDB.
 | 
 | >Fix:
 |      Sorry, don't know.
 |      The 5.99.38 kernel is dated Sep 1 2010, at the time built from
 |      pretty fresh sources, and quite a few changes have gone into
 |      the pm2fb driver since then, among them i2c code.
 
 boot -c 
 and unconfigure pm2fb....
 
 If that get's you further, that's it.
 
 
 christos