挂载根文件系统后，无法正常输入输出。出现乱码、死机、中断异常等现象。求帮助，大红包感谢！
一、以下为异常现象一
VFS: Mounted root (ext2 filesystem).
Freeing init memory: 240K
@@@ OPT gprs_uart_startup: port=c037af50 (56000000,f2000000)
ramdisk_execute_command
execute_command
Welcome to tinyLinux
Bemounting the root filesystem
a
44
B
]
B
二、以下为异常现象二
VFS: Mounted root (ext2 filesystem).
Freeing init memory: 240K
@@@ OPT gprs_uart_startup: port=c037af50 (56000000,f2000000)
ramdisk_execute_command
execute_command
BUG: soft lockup detected on CPU#0!
[<c0048bec>] (dump_stack+0x0/0x14) from [<c0080278>] (softlockup_tick+0xa0/0xc0)
[<c00801d8>] (softlockup_tick+0x0/0xc0) from [<c0069138>] (run_local_timers+0x18/0x1c)
r7 = 00000001 r6 = 00000001 r5 = 00000000 r4 = C034BE78
[<c0069120>] (run_local_timers+0x0/0x1c) from [<c0069180>] (update_process_times+0x44/0x6c)
[<c006913c>] (update_process_times+0x0/0x6c) from [<c0048a38>] (timer_tick+0xc8/0xe8)
r5 = C039A460 r4 = 00000004
[<c0048970>] (timer_tick+0x0/0xe8) from [<c00587b8>] (sm9c_timer_interrupt+0x48/0x64)
r5 = C039A460 r4 = 00000004
[<c0058770>] (sm9c_timer_interrupt+0x0/0x64) from [<c0080758>] (handle_IRQ_event+0x44/0x80)
r7 = 0000000C r6 = 00000000 r5 = 00000000 r4 = C03501A4
[<c0080714>] (handle_IRQ_event+0x0/0x80) from [<c0081a04>] (handle_level_irq+0xac/0x104)
r7 = C0349F50 r6 = C03A6710 r5 = 0000000C r4 = C034A300
[<c0081958>] (handle_level_irq+0x0/0x104) from [<c00457bc>] (asm_do_IRQ+0x64/0x80)
r5 = C034A000 r4 = 0000000C
