Hi, The simple" config is deprecated , when the MMIO support was added to the KGDB 8250 driver. I have to use the syntax:
kgdb8250=<io or mmio>,<address>,<baud rate>,<irq> Thanks Srikanth On Sat, Mar 28, 2009 at 8:40 PM, srikanth krishnakar <[email protected]>wrote: > Hi all, > > I am using KGDB on powerpc-440. This is tested on* Linux-2.6.27*, the > following arguments to KGDB showing init_delay of 8250 as shown below: > > Target Side : > > ----------------------------- > > Linux/PowerPC load: console=ttyS0 ip=bootp root=/dev/nfs rw > kgdb8250=ttyS0,9600 kgdbwait > Finalizing device tree... flat tree at 0x5ad300 > > *kgdb8250: ttyS0 init delayed, use io/mmio/mbase syntax for early > init. * > ..... > ..... > ....... > ...... > ...... > ....... > ...... > console [ttyS0] enabled > kgdb: Registered I/O driver kgdb8250. > > Stops here -> > ------------------------------- > > Host Side: > > (gdb) target remote > /dev/ttyS0 > Remote debugging using > /dev/ttyS0 > 0xc01a760c in mem_serial_in (p=0xc036e050, offset=<value optimized > out>) > at /opt/linux-2.6.29/arch/powerpc/include/asm/io.h:153 > 153 DEF_MMIO_IN_BE(in_8, 8, lbz); > > (gdb) info threads > 14 Thread 109 (nfsiod) __switch_to (prev=<value optimized out>, > new=0xcf8227f0) at arch/powerpc/kernel/process.c:412 > 13 Thread 108 (aio/0) __switch_to (prev=<value optimized out>, > new=0xcf8227f0) at arch/powerpc/kernel/process.c:412 > 12 Thread 107 (kswapd0) __switch_to (prev=<value optimized out>, > new=0xcf8227f0) at arch/powerpc/kernel/process.c:412 > 11 Thread 106 (pdflush) __switch_to (prev=<value optimized out>, > new=0xcf8227f0) at arch/powerpc/kernel/process.c:412 > 10 Thread 105 (pdflush) __switch_to (prev=<value optimized out>, > new=0xcf8227f0) at arch/powerpc/kernel/process.c:412 > > > ******************** > But when I say Continue -> <Got the Error as below > > > (gdb) c > Continuing. > *warning: Remote failure reply: E22 * > > ------------------------ > > Can anybody correct me, where I am going wrong. I am not able to hit KGDB > breakpoint. ? > > > > -- > Regards > Srikanth Krishnakar > ********************** > -- "The Good You Do, The Best You GET" Regards Srikanth Krishnakar **********************
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