Date: Thu, 5 Aug 2010 18:43:20 +0530 From: waynegong L <waynegong83@gmail.com> To: "Jayachandran C." <c.jayachandran@gmail.com> Cc: freebsd-mips@freebsd.org Subject: Re: HEADSUP : n64 changes in HEAD. Message-ID: <AANLkTimXKCPUWvmitNADEakCRxDks51Bd3-0MqhR=kwb@mail.gmail.com> In-Reply-To: <AANLkTimykzp%2Bv-x1V_u%2Bp3Q9BUW=vdbv84D0e%2BTwJ1Em@mail.gmail.com> References: <AANLkTimykzp%2Bv-x1V_u%2Bp3Q9BUW=vdbv84D0e%2BTwJ1Em@mail.gmail.com>
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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.
-----------------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.
Thanks,
Wayne.
On Wed, Aug 4, 2010 at 7:52 PM, Jayachandran C. <c.jayachandran@gmail.com>wrote:
> I have checked the n64 changes into HEAD. The changes areto add 3 level
> page tables for n64 compilation. Juli's work (from octeon branch) had
> added
> most of kernel and userspace code for n64, other than the page table code,
> so this is just one of the last pieces of the whole effort. I have already
> checked in fixes to many user/kernel components for n64 during the past
> week.
>
> I have tried quite a bit to make sure that the new 32 bit code in pmap.c is
> completely equivalent to the earlier code. If you see any regressions in
> the o32 compilation, please let me know.
>
> To try out 64 bit, the environment and commands are:
> --
> export TARGET=mips
> export TARGET_ARCH=mips
> export TARGET_CPUTYPE=mips64
> export TARGET_BIG_ENDIAN=y
> export TARGET_ABI=n64
> export KERNCONF=XLR64
> make buildworld -DWITHOUT_CDDL -DWITHOUT_USB -DWITHOUT_BLUETOOTH
> make buildkernel
> --
>
> The n64 kernel and userspace comes up in multi-user, and is pretty stable.
>
> There is still some work to do:
> - SMP is still untested
> - PTE entries are still 32 bit, physmem >4GB is not yet supported
> - ddb does not fully work yet
> - thread libraries are not tested yet.
> - page table page allocation code needs to be updated to use XKPHYS.
> - buildworld still has some components (see -D above) which does not
> compile.
> - code for 32 bit compatibility is still not there, so only n64 executables
> run on n64 kernel.
>
> But other than this, if you come across any crash or failure in n64 please
> let me know.
>
> Thanks,
> JC.
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