Hi , I'm trying to boot linux with u-boot on a s3adsp1800 board. First I debug both things (U-boot and linux) separately with or32-elf-gdb and U-boot works fine but linux stoped at the"Calibrating delay
loop..." procedure.
Now I'm trying to boot linux with u-boot via tftp and everything works fine until linux image start booting. At this time i don't get anymore response from the uart interface.


U-Boot 2013.04-g9181a73-dirty (Oct 30 2013 - 19:58:28)

CPU: OpenRISC-1200 (rev 8) @ 50 MHz
D-Cache: 4096 bytes, 16 bytes/line, 1 way(s)
I-Cache: 512 bytes, 16 bytes/line, 1 way(s)
DMMU: 64 sets, 1 way(s)
IMMU: 64 sets, 1 way(s)
MAC unit: yes
Debug unit: yes
Performance counters: no
Power management: no
Interrupt controller: yes
Timer: yes
Custom unit(s): no
Supported instructions:
ORBIS32: yes
ORBIS64: no
ORFPX32: no
ORFPX64: no
Hardware multiplier: yes
Hardware divider: yes
BOARD: s3adsp1800a
SF: Detected M25P64 with page size 64 KiB, total 8 MiB
NET: ETHOC-0
==> printenv
baudrate=115200
bootfile=uImage
ethact=ETHOC-0
ethaddr=00:12:34:56:78:9a
gatewayip=192.168.1.1
ipaddr=192.168.1.32
loadaddr=0x100000
netmask=255.255.255.0
serverip=192.168.1.98
stderr=serial
stdin=serial
stdout=serial

Environment size: 243/131068 bytes
==> ping 192.168.1.98
ethoc
Using ETHOC-0 device
host 192.168.1.98 is alive
==> tftpboot
ethoc
Using ETHOC-0 device
TFTP from server 192.168.1.98; our IP address is 192.168.1.32
Filename 'uImage'.
Load address: 0x100000
Loading: #################################################################
#################################################################
#################################################################
#################################################################
#################################################################
####################
1.5 MiB/s
done
Bytes transferred = 5060627 (4d3813 hex)
==> bootm 0x100000
## Booting kernel from Legacy Image at 00100000 ...
Image Name: Linux for OpenRISC
Image Type: OpenRISC 1000 Linux Kernel Image (uncompressed)
Data Size: 5060563 Bytes = 4.8 MiB
Load Address: 00000000
Entry Point: 00000100
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK

Why is this happend if when I use gdb I'm getting uart response???

Sorry but my English isn't so good.
I hope someone can help.

Thanks in advance. Pablo.

Update : When I try to gdb the kernel image directly I've got this output. Compiled-in FDT at c029c1c0 Linux version 3.9.0-dirty (cudar73@cudar73-desktop) (gcc version 4.5.1-or32-1.0rc4 (OpenRISC 32-bit toolchain for or3 CPU: OpenRISC-12 (revision 8) @50 MHz -- dcache: 4096 bytes total, 16 bytes/line, 1 way(s) -- icache: 512 bytes total, 16 bytes/line, 1 way(s) -- dmmu: 64 entries, 1 way(s) -- immu: 64 entries, 1 way(s) -- additional features: -- debug unit -- PIC -- timer setup_memory: Memory: 0x0-0x2000000 Reserved - 0x01ffda90-0x00002570 Setting up paging and PTEs. map_ram: Memory: 0x0-0x2000000 itlb_miss_handler c0002198 dtlb_miss_handler c0002000 OpenRISC Linux -- http://openrisc.net Built 1 zonelists in Zone order, mobility grouping off. Total pages: 4080 Kernel command line: earlycon=uart,mmio,0x90000000,115200 console=ttyS0,115200 Early serial console at MMIO 0x90000000 (options '115200') bootconsole [uart0] enabled PID hash table entries: 128 (order: -4, 512 bytes) Dentry cache hash table entries: 4096 (order: 1, 16384 bytes) Inode-cache hash table entries: 2048 (order: 0, 8192 bytes) Memory: 28448k/32768k available (2228k kernel code, 4320k reserved, 337k data, 1416k init, 0k highmem) mem_init_done ........................................... NR_IRQS:32 nr_irqs:32 0 1 Mount-cache hash table entries: 1024 KERNEL: Unaligned Access 0xc101368f CPU #: 0 PC: c0092b54 SR: 8079 SP: c1031df8 GPR00: 0 GPR01: c1031df8 GPR02: c101368f GPR03: ffffe000 GPR04: c1012000 GPR05: b55 GPR06: 4 GPR07: c1013608 GPR08: c1012000 GPR09: c00929b4 GPR10: c1030000 GPR11: ffffe000 GPR12: 0 GPR13: 0 GPR14: c040e120 GPR15: 43e GPR16: 7 GPR17: 40 GPR18: d GPR19: fffffffc GPR20: 6 GPR21: 3 GPR22: c1017e78 GPR23: 3fffffe7 GPR24: 00000000 GPR25: 00000000 GPR26: 00000000 GPR27: 00000cc0 GPR28: 0 GPR29: c1032000 GPR30: 0 GPR31: c03e65b8 RES: ffffe000 oGPR11: ffffffff Process kdevtmpfs (pid: 9, stackpage=c101fbb0) Stack: Stack dump [0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008 sp + 04: 0xc101368f sp + 08: 0xffffe000 sp + 12: 0xc1012000 sp + 16: 0xb55 sp + 20: 0x04 sp + 24: 0xc1013608 sp + 28: 0xc1012000 sp + 32: 0xc00929b4 sp + 36: 0xc1030000 sp + 40: 0xffffe000 sp + 44: 0x00 ... Lot of text .. sp + 740: 0x55555555 sp + 744: 0x55555555 sp + 748: 0x55555555 sp + 752: 0x55555555 sp + 756: 0x55555555 sp + 760: 0x55555555 sp + 764: 0x55555555 sp + 768: 0x55555555 sp + 772: 0x55555555 sp + 776: 0x55555555 sp + 780: 0x55555555 sp + 784: 0x55555555 [] [] [] [] [] [] [] [] [] [] [] [] ======================= Code: bd b0 00 01 e0 82 18 03 e0 a5 20 02 b8 a5 00 0f 10 00 00 66 b8 a5 00 90 (dc) 02 80 00 dc 02 28 02 98 67 00 00 Die:#: 368f CPU #: 0 PC: c0092b54 SR: 8079 SP: c1031df8 GPR00: 0 GPR01: c1031df8 GPR02: c101368f GPR03: ffffe000 GPR04: c1012000 GPR05: b55 GPR06: 4 GPR07: c1013608 GPR08: c1012000 GPR09: c00929b4 GPR10: c1030000 GPR11: ffffe000 GPR12: 0 GPR13: 0 GPR14: c040e120 GPR15: 43e GPR16: 7 GPR17: 40 GPR18: d GPR19: fffffffc GPR20: 6 GPR21: 3 GPR22: c1017e78 GPR23: 3fffffe7 GPR24: 0 GPR25: 0 GPR26: 0 GPR27: 00000cc0 GPR28: 0 GPR29: c1032000 GPR30: 0 GPR31: c03e65b8 RES: ffffe000 oGPR11: ffffffff Process kdevtmpfs (pid: 9, stackpage=c101fbb0) Stack: Stack dump [0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008 sp + 04: 0xc101368f sp + 08: 0xffffe000 sp + 12: 0xc1012000 sp + 16: 0xb55 sp + 20: 0x04 sp + 24: 0xc1013608 sp + 28: 0xc1012000 sp + 32: 0xc00929b4 sp + 36: 0xc1030000 sp + 40: 0xffffe000 ... Lot of text ... sp + 700: 0x55555555 sp + 704: 0x55555555 sp + 708: 0x55555555 sp + 712: 0x55555555 sp + 716: 0x55555555 sp + 720: 0x55555555 sp + 724: 0x55555555 sp + 728: 0x55555555 sp + 732: 0x55555555 sp + 736: 0x55555555 sp + 740: 0x55555555 sp + 744: 0x55555555 sp + 748: 0x55555555 sp + 752: 0x55555555 sp + 756: 0x55555555 sp + 760: 0x55555555 sp + 764: 0x55555555 sp + 768: 0x55555555 sp + 772: 0x55555555 sp + 776: 0x55555555 sp + 780: 0x55555555 sp + 784: 0x55555555 [] [] [] [] [] [] [] [] [] [] [] [] ======================= Code: bd b0 00 01 e0 82 18 03 e0 a5 20 02 b8 a5 00 0f 10 00 00 66 b8 a5 00 90 (dc) 02 80 00 dc 02 28 02 98 67 00 00 UNHANDLED_EXCEPTION: entering infinite loop It seems that the "KERNEL: Unaligned Access 0xc101368f" it's the problem , how do i prevent this access ? Thx.

Update .

Now I'm getting this output :

[ 0.000000] Compiled-in FDT at c02a8820
[ 0.000000] Linux version 3.9.0-dirty (cudar73@cudar73-desktop) (gcc version 4.5.1-or323
[ 0.000000] CPU: OpenRISC-12 (revision 8) @25 MHz
[ 0.000000] -- dcache: 4096 bytes total, 16 bytes/line, 1 way(s)
[ 0.000000] -- icache: 512 bytes total, 16 bytes/line, 1 way(s)
[ 0.000000] -- dmmu: 64 entries, 1 way(s)
[ 0.000000] -- immu: 64 entries, 1 way(s)
[ 0.000000] -- additional features:
[ 0.000000] -- debug unit
[ 0.000000] -- PIC
[ 0.000000] -- timer
[ 0.000000] setup_memory: Memory: 0x0-0x8000000
[ 0.000000] Reserved - 0x07ffda90-0x00002570
[ 0.000000] Setting up paging and PTEs.
[ 0.000000] map_ram: Memory: 0x0-0x8000000
[ 0.000000] itlb_miss_handler c0002198
[ 0.000000] dtlb_miss_handler c0002000
[ 0.000000] OpenRISC Linux -- http://openrisc.net
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16312
[ 0.000000] Kernel command line: console=uart,mmio,0x90000000,115200
[ 0.000000] Early serial console at MMIO 0x90000000 (options '115200')
[ 0.000000] bootconsole [uart0] enabled
[ 0.000000] PID hash table entries: 512 (order: -2, 2048 bytes)
[ 0.000000] Dentry cache hash table entries: 16384 (order: 3, 65536 bytes)
[ 0.000000] Inode-cache hash table entries: 8192 (order: 2, 32768 bytes)
[ 0.000000] Memory: 126088k/131072k available (2270k kernel code, 4984k reserved, 345k )
[ 0.000000] mem_init_done ...........................................
[ 0.000000] NR_IRQS:32 nr_irqs:32 0
[ 0.000000] 50.00 BogoMIPS (lpj=250000)
[ 0.000000] pid_max: default: 32768 minimum: 301
[ 0.020000] Mount-cache hash table entries: 1024
[ 0.390000] devtmpfs: initialized
[ 0.460000] NET: Registered protocol family 16
[ 0.810000] Switching to clocksource openrisc_timer
[ 0.960000] NET: Registered protocol family 2
[ 1.040000] TCP established hash table entries: 1024 (order: 0, 8192 bytes)
[ 1.050000] TCP bind hash table entries: 1024 (order: -1, 4096 bytes)
[ 1.060000] TCP: Hash tables configured (established 1024 bind 1024)
[ 1.110000] TCP: reno registered
[ 1.110000] UDP hash table entries: 512 (order: 0, 8192 bytes)
[ 1.130000] UDP-Lite hash table entries: 512 (order: 0, 8192 bytes)
[ 1.160000] NET: Registered protocol family 1
[ 1.240000] RPC: Registered named UNIX socket transport module.
[ 1.250000] RPC: Registered udp transport module.
[ 1.250000] RPC: Registered tcp transport module.
[ 1.260000] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 1.300000] Unable to handle kernel NULL pointer dereference at virtual address 0x000002
[ 1.310000]
[ 1.310000] Oops#: 0000
[ 1.320000] CPU #: 0
[ 1.320000] PC: c00a8ce0 SR: 0000827f SP: c7017d70
[ 1.330000] GPR00: 00000000 GPR01: c7017d70 GPR02: 00000001 GPR03: 00000000
[ 1.340000] GPR04: 00000001 GPR05: 00000004 GPR06: 00000000 GPR07: 01c000e1
[ 1.350000] GPR08: 00000004 GPR09: c00a8ce0 GPR10: c7016000 GPR11: 00000000
[ 1.360000] GPR12: 0000006e GPR13: 0000006e GPR14: c7066000 GPR15: ffffffd1
[ 1.370000] GPR16: c7017d90 GPR17: 00000800 GPR18: ffffff9c GPR19: fffffff0
[ 1.380000] GPR20: c02a90fe GPR21: 0000000f GPR22: c7017dfc GPR23: abdf6f5d
[ 1.390000] GPR24: 000003e8 GPR25: 00000000 GPR26: 000003e8 GPR27: 00000c74
[ 1.400000] GPR28: c7017e44 GPR29: 000033e8 GPR30: c02952dc GPR31: c03f25b8
[ 1.410000] RES: 00000000 oGPR11: ffffffff
[ 1.420000] Process swapper (pid: 1, stackpage=c7000f40)
[ 1.430000]
.... And all the stack dump ...