hello,
my board is designed accroding sabre sd board, on which run Android_kk4.4.2 (kernel 3.0.35).I come cross a problem that the board usually reboot (first ,the desktop is stopping ,can't do anything then it reboot)when I operrate on android desktop only one to three minutes. before it reboot ,the log print :
[ 71.742086] Internal error: Oops - undefined instruction: 0 [#1] PREEMPT SMP
[ 71.749510] Modules linked in: rtk_btusb [last unloaded: 8723bu]
[ 71.755794] CPU: 0 Tainted: G B (3.0.35 #231)
[ 71.761393] PC is at 0xc80e1640
[ 71.764593] LR is at 0xc80e1640
[ 71.767795] pc : [<c80e1640>] lr : [<c80e1640>] psr: 200f0193
[ 71.767800] sp : c093bf48 ip : d61f360c fp : 00000000
[ 71.779458] r10: 00000000 r9 : c093a000 r8 : 00000000
[ 71.784796] r7 : 00000044 r6 : c093a000 r5 : c0054dc4 r4 : c09507d0
[ 71.791437] r3 : 00000002 r2 : 00010002 r1 : 00000044 r0 : c093e34c
[ 71.798027] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 71.805537] Control: 10c53c7d Table: 2219804a DAC: 00000015
[ 71.811344]
[ 71.811346] PC: 0xc80e15c0:
[ 71.815795] 15c0 d7cfffef 7a6ff8fa fdfe7f63 bfbfde9f fafff67e f9cf1ebf ffb7f973 af6f7ffb
[ 71.824675] 15e0 33775bb8 7cbcfbfd dbcd7fb9 7ffa4db6 aeff6bbb 5f76ef64 fbbffd7f 7df6b3fe
[ 71.833607] 1600 e2cffd3f edfdffdb f6befaef affdebf9 effffd8f ed7dffef f7fdfeba bffdd9ff
[ 71.842536] 1620 ecddf5f9 dffe7ff7 efffad6f ffae6777 dbbeb3f2 ddbefffd ffcfe7df 6deffeff
[ 71.851463] 1640 ff7f1ac9 d89fd717 5dff4eb9 e7fafdf7 fb766bcb 20ffffb7 6beb3abb fbc3fefb
[ 71.860339] 1660 f5feaacf 6ff7fffb f7ffabdf 7fdd7fff affef26b fedf7977 f7ff7f4a cbf77fdf
[ 71.869218] 1680 df7fe7f7 fb76fd74 fcee2c53 dadefbff 768f4f7d b8def9fc fffeaedf a267cfb7
[ 71.878144] 16a0 eefe73ff ad5fef77 fdfdf5ef 9d5f5bf6 7ef638ea 8aff7ffa 7fbf71bf bff57fde
[ 71.887020]
[ 71.887022] LR: 0xc80e15c0:
[ 71.891470] 15c0 d7cfffef 7a6ff8fa fdfe7f63 bfbfde9f fafff67e f9cf1ebf ffb7f973 af6f7ffb
[ 71.900404] 15e0 33775bb8 7cbcfbfd dbcd7fb9 7ffa4db6 aeff6bbb 5f76ef64 fbbffd7f 7df6b3fe
[ 71.909280] 1600 e2cffd3f edfdffdb f6befaef affdebf9 effffd8f ed7dffef f7fdfeba bffdd9ff
[ 71.918154] 1620 ecddf5f9 dffe7ff7 efffad6f ffae6777 dbbeb3f2 ddbefffd ffcfe7df 6deffeff
[ 71.927083] 1640 ff7f1ac9 d89fd717 5dff4eb9 e7fafdf7 fb766bcb 20ffffb7 6beb3abb fbc3fefb
[ 71.935959] 1660 f5feaacf 6ff7fffb f7ffabdf 7fdd7fff affef26b fedf7977 f7ff7f4a cbf77fdf
[ 71.944887] 1680 df7fe7f7 fb76fd74 fcee2c53 dadefbff 768f4f7d b8def9fc fffeaedf a267cfb7
[ 71.953817] 16a0 eefe73ff ad5fef77 fdfdf5ef 9d5f5bf6 7ef638ea 8aff7ffa 7fbf71bf bff57fde
[ 71.962745]
[ 71.962747] SP: 0xc093bec8:
[ 71.967145] bec8 000000a4 00000044 00000000 c093e34c 00000044 00000001 00000000 c093a000
[ 71.976076] bee8 c093a000 00010003 00000000 c093a050 00000001 c005c444 c093e34c 00000044
[ 71.984948] bf08 00010002 00000002 c09507d0 c0054dc4 c093a000 00000044 00000000 c093a000
[ 71.993877] bf28 00000000 00000000 d61f360c c093bf48 c80e1640 c80e1640 200f0193 ffffffff
[ 72.002808] bf48 00000270 c005d1b0 ffffffff f2a00100 00000044 00000002 00000001 c005c34c
[ 72.011733] bf68 c09e4548 800f0093 00000001 00000000 c093a000 c09cffe4 c094fa70 c06bdea4
[ 72.020615] bf88 c0958084 412fc09a 00000000 00000000 00000000 c093bfb0 c006c284 c005d468
[ 72.029541] bfa8 400f0013 ffffffff c005d444 c005d790 c095061c 00000000 c003b2fc c1367180
[ 72.038469]
[ 72.038471] IP: 0xd61f358c:
[ 72.042869] 358c 00000000 00000000 00000000 00000000 2d786d69 00633269 00000000 00000000
[ 72.051797] 35ac 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.060722] 35cc 00000000 00000000 00000000 00000000 00000000 00000001 00000000 00000000
[ 72.069598] 35ec d61f35ec d61f35ec 00000000 d61f35f8 d61f35f8 d6184e60 c095d2f4 d981e000
[ 72.078533] 360c 00000044 00000000 00000000 d61f3618 d61f3618 000000a6 0000000b 00000000
[ 72.087468] 362c 00000032 014fb180 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.096403] 364c 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.105279] 366c 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.114209]
[ 72.114211] R0: 0xc093e2cc:
[ 72.118609] e2cc 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.127543] e2ec 00000000 00000000 d6093a20 00000000 00000000 00000044 00000000 00000000
[ 72.136474] e30c c0958b60 00000000 c094fa90 00000000 0000000f 00000000 c0057b64 c00e429c
[ 72.145403] e32c d62947e0 00000000 00000000 00000000 00000000 0000058a 00000000 00000000
[ 72.154282] e34c 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.163212] e36c c093e36c c093e36c d6093720 00000000 00000000 00000045 00000000 00000000
[ 72.172089] e38c c0958b60 00000000 c094fa90 00000000 0000000f 00000000 c0057b68 c00e429c
[ 72.180964] e3ac d6294760 00000000 00000000 00000000 00000000 000003d6 00000000 00000000
[ 72.189897]
[ 72.189899] R4: 0xc0950750:
[ 72.194351] 0750 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.203226] 0770 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.212158] 0790 00000064 00008000 0000000f c1389020 00000008 00000004 c1389000 c1381000
[ 72.221033] 07b0 c136a000 0000002c c1371000 c1379000 00000001 00001000 00000000 00000003
[ 72.229909] 07d0 01316000 0131e000 01326000 0132e000 0001a500 00000002 00028ffb 0004ffff
[ 72.238843] 07f0 00000001 00000032 0000fffa 00000001 d625dae0 d625da80 00000000 d6018f20
[ 72.247775] 0810 0000000f d601d580 d625da20 d6000a20 00000010 c138b120 0000ffff 00000064
[ 72.256703] 0830 d6000a80 0000000f c13cb120 00007fff d6018f80 00100000 d601b000 0000000f
[ 72.265579]
[ 72.265581] R5: 0xc0054d44:
[ 72.270032] 4d44 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.278907] 4d64 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0000001c
[ 72.287837] 4d84 00000000 00000000 00000000 00000000 00000000 00000000 ea020000 00440607
[ 72.296764] 4da4 00000000 0000001a 00000000 696c6573 0078756e 00000000 00000000 00000000
[ 72.305692] 4dc4 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.314567] 4de4 626f3a75 7463656a 733a725f 65747379 69665f6d 733a656c 00000030 000081a4
[ 72.323493] 4e04 000006b8 5959ea63 5959ea63 5959ea63 00000000 00010000 00000008 00080080
[ 72.332422] 4e24 00000000 0001f30a 00000003 00000000 00000000 00000001 0000fc0d 00000000
[ 72.341351]
[ 72.341353] R6: 0xc0939f80:
[ 72.345750] 9f80 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.354675] 9fa0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.363548] 9fc0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.372476] 9fe0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.381404] a000 00000002 00010004 00000000 c0956e80 c096d7b4 00000000 00000015 c0956e80
[ 72.390331] a020 c136b320 00000000 c093a000 6142b3eb d617d140 c0957120 c093bfb4 c093bf00
[ 72.399200] a040 c06b8a20 00000000 00000000 00000000 00000000 00000000 00010000 00000000
[ 72.408128] a060 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.417057]
[ 72.417059] R9: 0xc0939f80:
[ 72.421455] 9f80 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.430383] 9fa0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.439308] 9fc0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.448181] 9fe0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.457111] a000 00000002 00010004 00000000 c0956e80 c096d7b4 00000000 00000015 c0956e80
[ 72.466040] a020 c136b320 00000000 c093a000 6142b3eb d617d140 c0957120 c093bfb4 c093bf00
[ 72.474917] a040 c06b8a20 00000000 00000000 00000000 00000000 00000000 00010000 00000000
[ 72.483846] a060 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 72.492780] Process swapper (pid: 0, stack limit = 0xc093a2f0)
[ 72.498674] Stack: (0xc093bf48 to 0xc093c000)
[ 72.503145] bf40: 00000270 c005d1b0 ffffffff f2a00100 00000044 00000002
[ 72.511439] bf60: 00000001 c005c34c c09e4548 800f0093 00000001 00000000 c093a000 c09cffe4
[ 72.519681] bf80: c094fa70 c06bdea4 c0958084 412fc09a 00000000 00000000 00000000 c093bfb0
[ 72.527975] bfa0: c006c284 c005d468 400f0013 ffffffff c005d444 c005d790 c095061c 00000000
[ 72.536270] bfc0: c003b2fc c1367180 1000406a c00088bc c00082f8 00000000 00000000 c003b2fc
[ 72.544512] bfe0: 00000000 10c53c7d c094fa6c c003b2f8 c095807c 10008040 00000000 00000000
[ 72.552808] Code: dbbeb3f2 ddbefffd ffcfe7df 6deffeff (ff7f1ac9)
[ 72.559069] ---[ end trace fad26496e1ea4e91 ]---
[ 72.563777] Kernel panic - not syncing: Fatal exception in interrupt
[ 72.570277] [<c0063fe4>] (unwind_backtrace+0x0/0x138) from [<c06b41ac>] (panic+0x74/0x194)
[ 72.578623] [<c06b41ac>] (panic+0x74/0x194) from [<c0060478>] (die+0x220/0x284)
[ 72.586067] [<c0060478>] (die+0x220/0x284) from [<c0056134>] (do_undefinstr+0x130/0x140)
[ 72.594296] [<c0056134>] (do_undefinstr+0x130/0x140) from [<c005c444>] (__und_svc+0x44/0x60)
[ 72.602857] Exception stack(0xc093bf00 to 0xc093bf48)
[ 72.607974] bf00: c093e34c 00000044 00010002 00000002 c09507d0 c0054dc4 c093a000 00000044
[ 72.616279] bf20: 00000000 c093a000 00000000 00000000 d61f360c c093bf48 c80e1640 c80e1640
[ 72.624530] bf40: 200f0193 ffffffff
[ 72.628137] [<c005c444>] (__und_svc+0x44/0x60) from [<c80e1640>] (0xc80e1640)
[ 72.635351] CPU1: stopping
[ 72.638188] [<c0063fe4>] (unwind_backtrace+0x0/0x138) from [<c00563a8>] (do_IPI+0x1d4/0x208)
[ 72.646695] [<c00563a8>] (do_IPI+0x1d4/0x208) from [<c005c34c>] (__irq_svc+0x4c/0xe8)
[ 72.654639] Exception stack(0xd6065ee8 to 0xd6065f30)
[ 72.659754] 5ee0: 00000000 c09e2c00 00000000 c09e2c20 00000202 d6064000
[ 72.668049] 5f00: d6064000 00000000 00000001 d6065f90 00000000 00000000 c0063770 d6065f30
[ 72.676341] 5f20: c00a3ea0 c00a37f0 20070113 ffffffff
[ 72.681459] [<c005c34c>] (__irq_svc+0x4c/0xe8) from [<c00a37f0>] (__do_softirq+0x60/0x25c)
[ 72.689841] [<c00a37f0>] (__do_softirq+0x60/0x25c) from [<c00a3ea0>] (irq_exit+0x98/0xa0)
[ 72.698136] [<c00a3ea0>] (irq_exit+0x98/0xa0) from [<c0056324>] (do_IPI+0x150/0x208)
[ 72.705998] [<c0056324>] (do_IPI+0x150/0x208) from [<c005c34c>] (__irq_svc+0x4c/0xe8)
[ 72.713889] Exception stack(0xd6065f90 to 0xd6065fd8)
[ 72.719054] 5f80: c09e4548 80070093 00000001 00000000
[ 72.727295] 5fa0: d6064000 c09cffe4 c094fa70 c06bdea4 c0958084 412fc09a 00000000 00000000
[ 72.735586] 5fc0: 00000000 d6065fd8 c006c284 c005d468 40070013 ffffffff
[ 72.742321] [<c005c34c>] (__irq_svc+0x4c/0xe8) from [<c005d468>] (default_idle+0x24/0x28)
[ 72.750567] [<c005d468>] (default_idle+0x24/0x28) from [<c005d790>] (cpu_idle+0xe0/0x124)
[ 72.758862] [<c005d790>] (cpu_idle+0xe0/0x124) from [<106afbd4>] (0x106afbd4)
[ 72.766113] CPU2: stopping
[ 72.768896] [<c0063fe4>] (unwind_backtrace+0x0/0x138) from [<c00563a8>] (do_IPI+0x1d4/0x208)
[ 72.777455] [<c00563a8>] (do_IPI+0x1d4/0x208) from [<c005c34c>] (__irq_svc+0x4c/0xe8)
[ 72.785346] Exception stack(0xd6071ee8 to 0xd6071f30)
[ 72.790513] 1ee0: 00000000 c09e2c00 00000000 c09e2c40 00000202 d6070000
[ 72.798807] 1f00: d6070000 00000000 00000002 d6071f90 00000000 00000000 c0063770 d6071f30
[ 72.807046] 1f20: c00a3ea0 c00a37f0 200f0113 ffffffff
[ 72.812216] [<c005c34c>] (__irq_svc+0x4c/0xe8) from [<c00a37f0>] (__do_softirq+0x60/0x25c)
[ 72.820600] [<c00a37f0>] (__do_softirq+0x60/0x25c) from [<c00a3ea0>] (irq_exit+0x98/0xa0)
[ 72.828843] [<c00a3ea0>] (irq_exit+0x98/0xa0) from [<c0056324>] (do_IPI+0x150/0x208)
[ 72.836706] [<c0056324>] (do_IPI+0x150/0x208) from [<c005c34c>] (__irq_svc+0x4c/0xe8)
[ 72.844650] Exception stack(0xd6071f90 to 0xd6071fd8)
[ 72.849762] 1f80: c09e4548 600f0093 00000001 00000000
[ 72.858056] 1fa0: d6070000 c09cffe4 c094fa70 c06bdea4 c0958084 412fc09a 00000000 00000000
[ 72.866349] 1fc0: 00000000 d6071fd8 c006c284 c005d468 400f0013 ffffffff
[ 72.873030] [<c005c34c>] (__irq_svc+0x4c/0xe8) from [<c005d468>] (default_idle+0x24/0x28)
[ 72.881327] [<c005d468>] (default_idle+0x24/0x28) from [<c005d790>] (cpu_idle+0xe0/0x124)
[ 72.889623] [<c005d790>] (cpu_idle+0xe0/0x124) from [<106afbd4>] (0x106afbd4)
[ 72.896820] CPU3: stopping
[ 72.899603] [<c0063fe4>] (unwind_backtrace+0x0/0x138) from [<c00563a8>] (do_IPI+0x1d4/0x208)
[ 72.908162] [<c00563a8>] (do_IPI+0x1d4/0x208) from [<c005c34c>] (__irq_svc+0x4c/0xe8)
[ 72.916105] Exception stack(0xd609bee8 to 0xd609bf30)
[ 72.921219] bee0: 00000000 c09e2c00 00000000 c09e2c60 00000282 d609a000
[ 72.929512] bf00: d609a000 00000000 00000003 d609bf90 00000000 00000000 c0063770 d609bf30
[ 72.937806] bf20: c00a3ea0 c00a37f0 200d0113 ffffffff
[ 72.942924] [<c005c34c>] (__irq_svc+0x4c/0xe8) from [<c00a37f0>] (__do_softirq+0x60/0x25c)
[ 72.951305] [<c00a37f0>] (__do_softirq+0x60/0x25c) from [<c00a3ea0>] (irq_exit+0x98/0xa0)
[ 72.959599] [<c00a3ea0>] (irq_exit+0x98/0xa0) from [<c0056324>] (do_IPI+0x150/0x208)
[ 72.967408] [<c0056324>] (do_IPI+0x150/0x208) from [<c005c34c>] (__irq_svc+0x4c/0xe8)
[ 72.975351] Exception stack(0xd609bf90 to 0xd609bfd8)
[ 72.980517] bf80: c09e4548 600d0093 00000001 00000000
[ 72.988759] bfa0: d609a000 c09cffe4 c094fa70 c06bdea4 c0958084 412fc09a 00000000 00000000
[ 72.997053] bfc0: 00000000 d609bfd8 c006c284 c005d468 400d0013 ffffffff
[ 73.003857] [<c005c34c>] (__irq_svc+0x4c/0xe8) from [<c005d468>] (default_idle+0x24/0x28)
[ 73.012101] [<c005d468>] (default_idle+0x24/0x28) from [<c005d790>] (cpu_idle+0xe0/0x124)
[ 73.020397] [<c005d790>] (cpu_idle+0xe0/0x124) from [<106afbd4>] (0x106afbd4)
please help me to analyze the problem,and how to resolve it .Thank you very much!