On 06/08/2012 03:51 PM, Fabio Visona wrote:
Not sure if this issue is related to Xenomai or not, however I hope somebody
can give me an hint:
we are getting an error of the following form from time to time:
This is a I-pipe bug, caused by a spurious rescheduling over an IRQ
context (blackfin is a bit special regarding this, to say the least).
You may want to check whether 2.6.35.9-1.16-01 fixes the issue.
Example 1:
Illegal use of supervisor resource
<5> - Attempted to use a Supervisor register or instruction from User mode.
<5> Supervisor resources are registers and instructions that are reserved
<5> for Supervisor use: Supervisor only registers, all MMRs, and Supervisor
<5> only instructions.
Kernel OOPS in progress
Deferred Exception context
No Valid process in current context
return address: [0xffa002e6]; contents of:
0xffa002c0: e331 949c 0030 3046 4d68 4f68 3210 a090
0xffa002d0: 4810 100e e14a 001c e10a 75e0 9110 0000
0xffa002e0: 0040 0020 9110 [0040] 6c66 0127 0010 e14a
0xffa002f0: 001c e10a 75e0 9110 0040 6c66 0127 0010
ADSP-BF518-0.0(Detected 0.2) 400(MHz CCLK) 80(MHz SCLK) (mpu off)
Linux version 2.6.34.7-ADI-2010R1 (gcc version 4.3.5 (ADI-
2010R1-RC4) ) #220 Thu
Jun 7 15:33:02 CEST 2012
SEQUENCER STATUS: Not tainted
SEQSTAT: 0000002e IPEND: 0008 IMASK: ffff SYSCFG: 0006
EXCAUSE : 0x2e
physical IVG3 asserted :<0xffa0076c> { _trap + 0x0 }
RETE:<0x00000000> /* Maybe null pointer? */
RETN:<0x001d7fa4> /* kernel dynamic memory (maybe user-space) */
RETX:<0x00000480> /* Maybe fixed code section */
RETS:<0xffa002c4> { _default_idle + 0x8 }
PC :<0xffa002e6> { _default_idle + 0x2a }
DCPLB_FAULT_ADDR:<0x001c75e0> /* kernel dynamic memory (maybe user-space) */
ICPLB_FAULT_ADDR:<0xffa002e6> { _default_idle + 0x2a }
PROCESSOR STATE:
R0 : 0000ffff R1 : fffffffc R2 : ffff0000 R3 : 00000001
R4 : 00000000 R5 : 00000000 R6 : 00000000 R7 : ffa002bc
P0 : 00000240 P1 : 001cd5e0 P2 : 001c75e0 P3 : 001d6008
P4 : 001d6008 P5 : ffa002bc FP : 001a126c SP : 001d7ec8
LB0: 000c5fa9 LT0: 000c5fa6 LC0: 00000000
LB1: 01471f75 LT1: 01471f74 LC1: 00000000
B0 : 001cd5e8 L0 : 00000000 M0 : 00000000 I0 : 0000000f
B1 : 00000000 L1 : 00000000 M1 : 00000000 I1 : 00000003
B2 : 00000000 L2 : 00000000 M2 : 00000000 I2 : 00000001
B3 : 00000000 L3 : 00000000 M3 : 00000000 I3 : 0000001f
A0.w: 00000005 A0.x: 00000000 A1.w: 00000005 A1.x: 00000000
USP : 001d8000 ASTAT: 02003064
Hardware Trace:
0 Target :<0x00003f18> { _trap_c + 0x0 }
Source :<0xffa00700> { _exception_to_level5 + 0xa4 } JUMP.L
1 Target :<0xffa0065c> { _exception_to_level5 + 0x0 }
Source :<0xffa00510> { _bfin_return_from_exception + 0x18 } RTX
2 Target :<0xffa004f8> { _bfin_return_from_exception + 0x0 }
Source :<0xffa005b4> { _ex_trap_c + 0x74 } JUMP.S
3 Target :<0xffa00540> { _ex_trap_c + 0x0 }
Source :<0xffa007c6> { _trap + 0x5a } JUMP (P4)
4 Target :<0xffa0076c> { _trap + 0x0 }
FAULT :<0xffa002e6> { _default_idle + 0x2a } STI R0
Source :<0xffa002e4> { _default_idle + 0x28 } R0 = [P2]
5 Target :<0xffa002e4> { _default_idle + 0x28 }
Source :<0xffa00d18> { __common_int_entry + 0xd0 } RTI
6 Target :<0xffa00cb6> { __common_int_entry + 0x6e }
Source :<0xffa00982> { _system_call + 0xee } RTS
7 Target :<0xffa0097e> { _system_call + 0xea }
Source :<0xffa0096e> { _system_call + 0xda } IF !CC JUMP pcrel
8 Target :<0xffa00964> { _system_call + 0xd0 }
Source :<0xffa00954> { _system_call + 0xc0 } IF !CC JUMP pcrel
9 Target :<0xffa00952> { _system_call + 0xbe }
Source :<0xffa00942> { _system_call + 0xae } IF !CC JUMP pcrel
10 Target :<0xffa00930> { _system_call + 0x9c }
Source :<0xffa00962> { _system_call + 0xce } JUMP.S
11 Target :<0xffa00960> { _system_call + 0xcc }
Source :<0x0013f576> { _schedule + 0x2c6 } RTS
12 Target :<0x0013f566> { _schedule + 0x2b6 }
Source :<0x0013f616> { _schedule + 0x366 } JUMP.S
13 Target :<0x0013f616> { _schedule + 0x366 }
Source :<0x00032fe2> { ___ipipe_unstall_root + 0x2a } RTS
14 Target :<0x00032fb8> { ___ipipe_unstall_root + 0x0 }
Source :<0x0013f612> { _schedule + 0x362 } JUMP.L
15 Target :<0x0013f60c> { _schedule + 0x35c }
Source :<0x0013f40a> { _schedule + 0x15a } IF CC JUMP pcrel
Kernel Stack
Stack info:
SP: [0x001d7c74]<0x001d7c74> /* kernel dynamic memory (maybe user-space) */
FP: (0x001d7fac)
Memory from 0x001d7c70 to 001d8000
001d7c70: 001d7d54 [00000400] 001c81e0 00011c36 001ae99c 0016ef7c 001ae9a6
00000000
001d7c90: 0000000f 00044b83 00011b54 00011b54 6c756465 736e0065 001d7d4c
001d7cb8
001d7cb0: 00000035 0000ffff 0000ffff 00009964 ffa002ac 00000001 0000000c
00000002
001d7cd0: 00000000 0001076c 00000000 481007af 00651005 00000002 01004e00
001d7fac
001d7cf0: 00007e82 001d7fac 0013f10c 001d7cf8 0016ef7c 00007e58 00000000
001d8000
001d7d10: 00000028 001d7d4c 00000002 00007f0a 001d7dec 001d7de8 00006424
001d7d28
001d7d30: 001d7fac 001d7d54 00000000 000063ec 00000033 00000000 00011c36
00011c36
001d7d50: 00000001 3078303c 37643130 3e343763 202a2f20 6e72656b 64206c65
6d616e79
001d7d70: 6d206369 726f6d65 6d282079 65627961 65737520 70732d72 29656361
002f2a20
001d7d90: 002f2a20 001d7dec ffa00300 ffa002e6 ffa00300 001d7ddc 001d7de4
0000000f
001d7db0: 001d7dec ffa002fe 00008988 001d7de4 001a126c 0013f10c 001d7ec8
0016e91c
001d7dd0: 001d6008 00000008 00000004 00000000 001d7e18 30313030 00000000
0000001d
001d7df0: 001a126c 000043d4 001d7ec8 00000013 001d6008 00000008 00000004
00000000
001d7e10: 0000002e 001d7ec8 001d7c74 00000001 001d7e4c 011b0664 00030005
001b0664
001d7e30: 00006ddc 001cd5e0 001b14a4 001b0664 00006844 ffffffff 00000001
00000024
001d7e50: 00000000 00000000 001c6184 001b09a8 00000344 001d7e98<0013f400>
0014132c
001d7e70: 001d7e98 0013f616 001b0664 001b0664 00000000 00000000 001d6008
001d6000
001d7e90: 001d6000 20000000 001a126c ffa00960 ffa00704 001a3000 ffe02014
00000008
001d7eb0: 0000002e 00000000 00000000 00000000 00000000 00000480 00000480
00000008
001d7ed0: 0000002e 00000000 001d7fa4 00000480 ffa002e6 ffa002c4 0000ffff
02003064
001d7ef0: 01471f75 000c5fa9 01471f74 000c5fa6 00000000 00000000 00000005
00000000
001d7f10: 00000005 00000000 00000000 00000000 00000000 001cd5e8 00000000
00000000
001d7f30: 00000000 00000000 00000000 00000000 00000000 00000000 0000001f
00000001
001d7f50: 00000003 0000000f 001d8000 001a126c ffa002bc 001d6008 001d6008
001c75e0
001d7f70: 001cd5e0 00000240 ffa002bc 00000000 00000000 00000000 00000001
ffff0000
001d7f90: fffffffc 0000ffff 0000ffff 00000240 00000006 ffa002bc 00000000
(
00000000)
001d7fb0:<ffa002b0> 00000000 001ef5a4 00000000 001d8000 001d8640 001c02c8
001a1004
001d7fd0: 00000000 001ef5a4 0016ca84 001766c8 8000003f 00000021 001d820c
001ef5a4
001d7ff0: 001e1a46 00000000 00000000 ffb00000
Return addresses in stack:
address :<0x0013f400> { _schedule + 0x150 }
frame 1 :<0xffa002b0> { _cpu_idle + 0x30 }
Modules linked in: bfmd_xeno_acq bfmd_xeno_drv bfmd_xeno_tim bfmd_xeno_ser
gptim
ers bfin_mac
Kernel panic - not syncing: Kernel exception
Hardware Trace:
Stack info:
SP: [0x001d7de8]<0x001d7de8> /* kernel dynamic memory (maybe user-space) */
FP: (0x001d7fac)
Memory from 0x001d7de0 to 001d8000
001d7de0: 001d7de8 001d6008 [0016e930] 0013efca 001d7ec8 0016e930 001a64be
001a64be
001d7e00: 001a64be 001d7e18 000043e4 001d7ec8 00000008 001d7ec8 0000003f
00000001
001d7e20: 001d7e4c 011b0664 00030005 001b0664 00006ddc 001cd5e0 001b14a4
001b0664
001d7e40: 00006844 ffffffff 00000001 00000024 00000000 00000000 001c6184
001b09a8
001d7e60: 00000344 001d7e98<0013f400> 0014132c 001d7e98 0013f616 001b0664
001b0664
001d7e80: 00000000 00000000 001d6008 001d6000 001d6000 20000000 001a126c
ffa00960
001d7ea0: ffa00704 001a3000 ffe02014 00000008 0000002e 00000000 00000000
00000000
001d7ec0: 00000000 00000480 00000480 00000008 0000002e 00000000 001d7fa4
00000480
001d7ee0: ffa002e6 ffa002c4 0000ffff 02003064 01471f75 000c5fa9 01471f74
000c5fa6
001d7f00: 00000000 00000000 00000005 00000000 00000005 00000000 00000000
00000000
001d7f20: 00000000 001cd5e8 00000000 00000000 00000000 00000000 00000000
00000000
001d7f40: 00000000 00000000 0000001f 00000001 00000003 0000000f 001d8000
001a126c
001d7f60: ffa002bc 001d6008 001d6008 001c75e0 001cd5e0 00000240 ffa002bc
00000000
001d7f80: 00000000 00000000 00000001 ffff0000 fffffffc 0000ffff 0000ffff
00000240
001d7fa0: 00000006 ffa002bc 00000000 (00000000)<ffa002b0> 00000000 001ef5a4
00000000
001d7fc0: 001d8000 001d8640 001c02c8 001a1004 00000000 001ef5a4 0016ca84
001766c8
001d7fe0: 8000003f 00000021 001d820c 001ef5a4 001e1a46 00000000 00000000
ffb00000
Return addresses in stack:
address :<0x0013f400> { _schedule + 0x150 }
frame 1 :<0xffa002b0> { _cpu_idle + 0x30 }
Example 2:
Illegal use of supervisor resource
<5> - Attempted to use a Supervisor register or instruction from User mode.
<5> Supervisor resources are registers and instructions that are reserved
<5> for Supervisor use: Supervisor only registers, all MMRs, and Supervisor
<5> only instructions.
Kernel OOPS in progress
Deferred Exception context
No Valid process in current context
return address: [0xffa002e6]; contents of:
0xffa002c0: e331 949c 0030 3046 4d68 4f68 3210 a090
0xffa002d0: 4810 100e e14a 001c e10a 75e0 9110 0000
0xffa002e0: 0040 0020 9110 [0040] 6c66 0127 0010 e14a
0xffa002f0: 001c e10a 75e0 9110 0040 6c66 0127 0010
ADSP-BF518-0.0(Detected 0.2) 400(MHz CCLK) 80(MHz SCLK) (mpu off)
Linux version 2.6.34.7-ADI-2010R1 (gcc version 4.3.5 (ADI-2010R1-RC4) ) #220
Thu Jun 7 15:33:02 CEST 2012
SEQUENCER STATUS: Not tainted
SEQSTAT: 0000002e IPEND: 0008 IMASK: ffff SYSCFG: 0006
EXCAUSE : 0x2e
physical IVG3 asserted :<0xffa0076c> { _trap + 0x0 }
RETE:<0x00000000> /* Maybe null pointer? */
RETN:<0x001d7fa4> /* kernel dynamic memory (maybe user-space) */
RETX:<0x00000480> /* Maybe fixed code section */
RETS:<0xffa002c4> { _default_idle + 0x8 }
PC :<0xffa002e6> { _default_idle + 0x2a }
DCPLB_FAULT_ADDR:<0x001c75e0> /* kernel dynamic memory (maybe user-space) */
ICPLB_FAULT_ADDR:<0xffa002e6> { _default_idle + 0x2a }
PROCESSOR STATE:
R0 : 0000ffff R1 : fffffffc R2 : 012046a0 R3 : 00000065
R4 : 00000000 R5 : 00000000 R6 : 00000000 R7 : ffa002bc
P0 : ffa00a04 P1 : 001c75e0 P2 : 001c75e0 P3 : 001d6008
P4 : 001d6008 P5 : ffa002bc FP : 001a126c SP : 001d7ec8
LB0: 000c5fa9 LT0: 000c5fa6 LC0: 00000000
LB1: 01545faf LT1: 01545fae LC1: 00000000
B0 : 00000000 L0 : 00000000 M0 : 00000004 I0 : 00000000
B1 : 00000000 L1 : 00000000 M1 : 00000000 I1 : 00000001
B2 : 00000000 L2 : 00000000 M2 : 00000000 I2 : 00000000
B3 : 00000000 L3 : 00000000 M3 : 00000000 I3 : 00000000
A0.w: 000002f1 A0.x: 00000000 A1.w: 00000015 A1.x: 00000000
USP : 001d8000 ASTAT: 02003064
Hardware Trace:
0 Target :<0x00003f18> { _trap_c + 0x0 }
Source :<0xffa00700> { _exception_to_level5 + 0xa4 } JUMP.L
1 Target :<0xffa0065c> { _exception_to_level5 + 0x0 }
Source :<0xffa00510> { _bfin_return_from_exception + 0x18 } RTX
2 Target :<0xffa004f8> { _bfin_return_from_exception + 0x0 }
Source :<0xffa005b4> { _ex_trap_c + 0x74 } JUMP.S
3 Target :<0xffa00540> { _ex_trap_c + 0x0 }
Source :<0xffa007c6> { _trap + 0x5a } JUMP (P4)
4 Target :<0xffa0076c> { _trap + 0x0 }
FAULT :<0xffa002e6> { _default_idle + 0x2a } STI R0
Source :<0xffa002e4> { _default_idle + 0x28 } R0 = [P2]
5 Target :<0xffa002e4> { _default_idle + 0x28 }
Source :<0xffa00d18> { __common_int_entry + 0xd0 } RTI
6 Target :<0xffa00cb6> { __common_int_entry + 0x6e }
Source :<0xffa00982> { _system_call + 0xee } RTS
7 Target :<0xffa0097e> { _system_call + 0xea }
Source :<0xffa0096e> { _system_call + 0xda } IF !CC JUMP pcrel
8 Target :<0xffa00964> { _system_call + 0xd0 }
Source :<0xffa00954> { _system_call + 0xc0 } IF !CC JUMP pcrel
9 Target :<0xffa00952> { _system_call + 0xbe }
Source :<0xffa00942> { _system_call + 0xae } IF !CC JUMP pcrel
10 Target :<0xffa00930> { _system_call + 0x9c }
Source :<0xffa00950> { _system_call + 0xbc } JUMP.S
11 Target :<0xffa0094e> { _system_call + 0xba }
Source :<0x00006a42> { ___ipipe_sync_root + 0x7e } RTS
12 Target :<0x00006a22> { ___ipipe_sync_root + 0x5e }
Source :<0x00006a1c> { ___ipipe_sync_root + 0x58 } IF CC JUMP pcrel (BP)
13 Target :<0x00006a02> { ___ipipe_sync_root + 0x3e }
Source :<0x000380c4> { _xnpod_schedule_deferred + 0x20 } RTS
14 Target :<0x000380a4> { _xnpod_schedule_deferred + 0x0 }
Source :<0x00006a00> { ___ipipe_sync_root + 0x3c } CALL (P1)
15 Target :<0x000069e6> { ___ipipe_sync_root + 0x22 }
Source :<0x000069e0> { ___ipipe_sync_root + 0x1c } IF CC JUMP pcrel (BP)
Kernel Stack
Stack info:
SP: [0x001d7e54]<0x001d7e54> /* kernel dynamic memory (maybe user-space) */
FP: (0x001d7fac)
Memory from 0x001d7e50 to 001d8000
001d7e50: 001c6000 [0000c762] 001c6000 001c6184 01029060 001d7e98 0013f566
001f17e0
001d7e70: 001c6000 01029060 001b0664 001b0664 00000000 00000000 001d6008
001d6000
001d7e90: 001d6000 001ce2e0 001a126c ffa00960 ffa00704 001a3000 ffe02014
00000008
001d7eb0: 0000002e 00000000 00000000 00000000 00000000 00000480 00000480
00000008
001d7ed0: 0000002e 00000000 001d7fa4 00000480 ffa002e6 ffa002c4 0000ffff
02003064
001d7ef0: 01545faf 000c5fa9 01545fae 000c5fa6 00000000 00000000 00000015
00000000
001d7f10: 000002f1 00000000 00000000 00000000 00000000 00000000 00000000
00000000
001d7f30: 00000000 00000000 00000000 00000000 00000000 00000004 00000000
00000000
001d7f50: 00000001 00000000 001d8000 001a126c ffa002bc 001d6008 001d6008
001c75e0
001d7f70: 001c75e0 ffa00a04 ffa002bc 00000000 00000000 00000000 00000065
012046a0
001d7f90: fffffffc 0000ffff 0000ffff ffa00a04 00000006 ffa002bc 00000000
(00000000)
001d7fb0:<ffa002b0> 00000000 001ef5a4 00000000 001d8000 001d8640 001c02c8
001a1004
001d7fd0: 00000000 001ef5a4 0016ca84 001766c8 8000003f 00000021 001d820c
001ef5a4
001d7ff0: 001e1a46 00000000 00000000 ffb00000
Return addresses in stack:
frame 1 :<0xffa002b0> { _cpu_idle + 0x30 }
Modules linked in: bfmd_xeno_acq bfmd_xeno_drv bfmd_xeno_tim bfmd_xeno_ser
gptimers bfin_mac
Kernel panic - not syncing: Kernel exception
Hardware Trace:
Stack info:
SP: [0x001d7de8]<0x001d7de8> /* kernel dynamic memory (maybe user-space) */
FP: (0x001d7fac)
Memory from 0x001d7de0 to 001d8000
001d7de0: 001d7de8 001d6008 [0016e930] 0013efca 001d7ec8 0016e930 001a64be
001a64be
001d7e00: 001a64be 001d7e18 000043e4 001d7ec8 00000008 001d7ec8 0000003f
00000001
001d7e20: 00000001 00000003 00030005 0102908c 001c7ca0 01029094 001c6000
001c6184
001d7e40: 0000a4ec 001d7e64 0000c8e2 001c7ca0 001c6000 0000c762 001c6000
001c6184
001d7e60: 01029060 001d7e98 0013f566 001f17e0 001c6000 01029060 001b0664
001b0664
001d7e80: 00000000 00000000 001d6008 001d6000 001d6000 001ce2e0 001a126c
ffa00960
001d7ea0: ffa00704 001a3000 ffe02014 00000008 0000002e 00000000 00000000
00000000
001d7ec0: 00000000 00000480 00000480 00000008 0000002e 00000000 001d7fa4
00000480
001d7ee0: ffa002e6 ffa002c4 0000ffff 02003064 01545faf 000c5fa9 01545fae
000c5fa6
001d7f00: 00000000 00000000 00000015 00000000 000002f1 00000000 00000000
00000000
001d7f20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
001d7f40: 00000000 00000004 00000000 00000000 00000001 00000000 001d8000
001a126c
001d7f60: ffa002bc 001d6008 001d6008 001c75e0 001c75e0 ffa00a04 ffa002bc
00000000
001d7f80: 00000000 00000000 00000065 012046a0 fffffffc 0000ffff 0000ffff
ffa00a04
001d7fa0: 00000006 ffa002bc 00000000 (00000000)<ffa002b0> 00000000 001ef5a4
00000000
001d7fc0: 001d8000 001d8640 001c02c8 001a1004 00000000 001ef5a4 0016ca84
001766c8
001d7fe0: 8000003f 00000021 001d820c 001ef5a4 001e1a46 00000000 00000000
ffb00000
Return addresses in stack:
frame 1 :<0xffa002b0> { _cpu_idle + 0x30 }
The faulty code is trying to enable interrupts while in user mode.
Linux is 2.6.34.7, running on a Blackfin BF518 processor.
Xenomai version 2.5.3 (I know I should upgrade to 2.6.0).
We had similar errors very often when a mode switch occurred from rt mode to
non-rt mode following a call to a real-time driver ioctl (.ioctl_rt in
rtdm_device structure, with a NULL .ioclt_nrt counterpart) which returned
-ENOSYS by mistake, instead of the correct 0 code.
Thank you
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--
Philippe.
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