On Thu, Apr 27, 2006 at 05:49:48PM +0200, Rodolfo Giometti wrote: > > I noticed that the serial lines management code is changed from > linux-2.6.12 and I'd like to know if someone is running the serial > console on ttyS0 on au1100... Modifying the printk() code and sending the output directly to the serial line (without using the driver since u-boot already init the serial port for me) I get: <4>Synthesized TLB store handler fastpath (34 instructions). <4>Synthesized TLB modify handler fastpath (33 instructions). <4>PID hash table entries: 512 (order: 9, 2048 bytes) <4>calculating r4koff... 00060ae0(396000) <4>CPU frequency 396.00 MHz <4>Break instruction in kernel code[#1]: <4>Cpu 0 <4>$ 0 : 00000000 1000fc00 0fffff00 00010000 <4>$ 4 : 803bfd30 00000000 8036dbe0 803bfd70 <4>$ 8 : 8036dbe0 00000000 00000000 1000fc01 <4>$12 : 803c0000 fffffffe ffffffff 0000000a <4>$16 : 803b1b78 803b1b80 83fc4000 83fb12e0 <4>$20 : a3eb4462 00000000 83fc4000 00000000 <4>$24 : 00000000 80363e1b <4>$28 : 80362000 80363f30 83fc4000 803a9a88 <4>Hi : 00000000 <4>Lo : 00030570 <4>epc : 80129a0c acquire_console_sem+0xd4/0xf0 Not tainted <4>ra : 803a9a88 con_init+0x24/0x2a0 <4>Status: 1000fc03 KERNEL EXL IE <4>Cause : 00800024 <4>PrId : 02030204 <4>Modules linked in: <4>Process swapper (pid: 0, threadinfo=80362000, task=80364000) <4>Stack : 83fc4000 803a42d4 00000000 00000800 803a9a88 179a7b00 83fc4000 83fb12e0 <4> a3eb4462 00000000 83fc4000 00000000 803b1b78 803b1b80 83fc4000 83fb12e0 <4> a3eb4462 00000000 803a8f58 803b0000 83fc4000 0000018c 00000000 431bde83 <4> 83fb4000 803b0000 8039479c 8039475c 80338f5c 803b4004 80366244 00000000 <4> 80394134 00000000 803b4e2c 00000000 83fb4000 83fb4000 83fb1aac 00000000 <4> <4>Call Trace: <4> [<803a42d4>] __alloc_bootmem_nopanic+0x68/0xb0 <4> [<803a9a88>] con_init+0x24/0x2a0 <4> [<803a8f58>] console_init+0x48/0x68 <4> [<8039479c>] start_kernel+0x194/0x3b4 <4> [<8039475c>] start_kernel+0x154/0x3b4 <4> [<80394134>] unknown_bootoption+0x0/0x304 <4> <4> <4>Code: 00000040 0804a664 00000000 <0200000d> 0804a657 3c03803b 0c0ca698 00000000 0804a667 <0>Kernel panic - not syncing: Aiee, killing interrupt handler! So the problem seems to be the "acquire_console_sem()" into "con_init()" function (file «drivers/char/vt.c»). Suggestions? How is possible that the serial console code is buggy? =:-o Ciao, Rodolfo -- GNU/Linux Solutions e-mail: giometti@xxxxxxxxxxxx Linux Device Driver giometti@xxxxxxxxx Embedded Systems giometti@xxxxxxxx UNIX programming phone: +39 349 2432127
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