HEADSUP : n64 changes in HEAD.

[Jayachandran C.]

On Thu, Aug 5, 2010 at 6:43 PM, waynegong L <waynegong83 at gmail.com> wrote:
> Hi Jayachandran,
>
> I have been waiting for n64 support and happy to see this mail.
> But unfortunately i got a panic with the from HEAD(revision 210854) on my
> octeon board. Please find the information below.
> I have built rootfs in to the kernel and the rootfs is stripped one with 30M
> size. Also SMP support is disabled in the config file.

There are few other changes to the config file too, to

options         ISA_MIPS64
makeoptions     LDSCRIPT_NAME=ldscript.mips.64
makeoptions     ARCH_FLAGS="-march=mips64 -mabi=64"
makeoptions   KERNLOADADDR=0xffffffff80100000

ideally, we should get this setup when TARGET_ABI is set, but not yet.

> -----------------panic
> info------------------------------------------------------------------
> Trying to mount root from ufs:/dev/md0
> warning: no time-of-day clock registered, system time will not be set
> accurately
> Lookup of /dev for devfs, error: 2
> start_init: trying /sbin/init
> panic: userret: Returning with 1 locks held.
> KDB: enter: panic
> [ thread pid 1 tid 100001 ]
> Stopped at      kdb_enter+0x90: lui     at,0x0
>
>
> A bit of debugging pointed has taken me to lockmgr.
>
> db> show alllocks
> Process 1 (init) thread 0xc000000007926000 (100001)
> exclusive lockmgr devfs (devfs) r = 0 (0xc000000007fb8cf0) locked @
> /freebsd/testmainline/
> head/sys/kern/vfs_subr.c:2101
>
> db> show lockedvnods
> Locked vnodes
>
> db> show lock 0xc000000007fb8cf0
>  class: lockmgr
>  name: devfs
>  state: XLOCK: 0xc000000007926000 (tid 100001, pid 1, "init")
>  waiters: none
>  spinners: none
>
> db> show thread 100001
> Thread 100001 at 0xc000000007926000:
>  proc (pid 1): 0xc000000007923000
>  name: init
>  stack: 0xc00000002589c000-0xc00000002589dfff
>  flags: 0x1000004  pflags: 0
>  state: RUNNING (CPU 0)
>  priority: 180
>  container lock: sched lock (0xffffffff8240a338)
>
>
> db>  ps
>   pid  ppid  pgrp   uid   state   wmesg         wchan        cmd
>    15     0     0     0  DL      mdwait   0xc0000000080a0800 [md0]
>    14     0     0     0  DL      -        0xffffffff82404eb4 [schedcpu]
>    13     0     0     0  DL      sdflush  0xffffffff825b00c8 [softdepflush]
>     9     0     0     0  DL      syncer   0xffffffff825ac2a0 [syncer]
>     8     0     0     0  DL      vlruwt   0xc0000000080a9448 [vnlru]
>     7     0     0     0  DL      psleep   0xffffffff825abe50 [bufdaemon]
>     6     0     0     0  RL                                  [pagezero]
>     5     0     0     0  DL      psleep   0xffffffff825b0e8c [pagedaemon]
>    12     0     0     0  DL      -        0xffffffff82404eb4 [yarrow]
>     4     0     0     0  DL      -        0xffffffff82401950 [g_down]
>     3     0     0     0  DL      -        0xffffffff82401948 [g_up]
>     2     0     0     0  DL      -        0xffffffff82401938 [g_event]
>    11     0     0     0  WL      (threaded)                  [intr]
> 100015                   I                                   [swi0: uart
> uart]
> 100014                   I                                   [swi5: +]
> 100012                   I                                   [swi6: task
> queue]
> 100011                   I                                   [swi6: Giant
> taskq]
> 100005                   I                                   [swi3: vm]
> 100004                   I                                   [swi1: netisr
> 0]
> 100003                   I                                   [swi4: clock]
>    10     0     0     0  RL                                  [idle]
>     1     0     0     0  RL      CPU 0                       [init]
>     0     0     0     0  DLs     (threaded)                  [kernel]
> 100017                   D       deadlkre 0xffffffff82404eb4 [deadlkres]
> 100016                   D       -        0xc0000000079b4380 [octe taskq]
> 100013                   D       -        0xc000000007972e00 [kqueue taskq]
> 100010                   D       -        0xc000000007955500 [thread taskq]
> 100000                   D       sched    0xffffffff824019c8 [swapper]
>
> My env is as below.
> TARGET=mips
> TARGET_ABI=n64
> TARGET_CPUTYPE=mips64
> TARGET_BIG_ENDIAN=y
>
> My kernel build was successful, Also buildworld/install world was done with
> the below components as suggested.
> -DWITHOUT_CDDL -DWITHOUT_USB -DWITHOUT_BLUETOOTH
>
> Please let me know if you need any more info.

`show registers' output will be good, but I think the kernel is still
not 64 bit, so the 64 bit userspace crashed.

JC.