Hi all: My platform is MPC8247, u-boot verison is 1.1.1 and linux kernel version is 2.4.22 in the serial console I load the linux kernel and want to boot it under u-boot:
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=> setenv ethaddr 00:01:02:03:04:05 => setenv ipaddr 192.168.0.33 => setenv serverip 192.168.0.222 => tftp 0x100000 uImage Using FCC1 ETHERNET device TFTP from server 192.168.0.222; our IP address is 192.168.0.33 Filename 'uImage'. Load address: 0x100000 Loading: ################################################################# ################################################################# ##################################### done Bytes transferred = 853098 (d046a hex) => bootm 0x100000 ## Booting image at 00100000 ... Image Name: Linux Kernel Image Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 853034 Bytes = 833 kB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK
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but after print the "Uncompressing Kernel Image ... OK" msg, the kernel hangs. I use the same u-boot.h file under linux kernel and u-boot, and sure the bd_info in them are same. IMMR address also are same at 0xf0000000.
My bdi2000 run and print below: ++++++++++++++++++++++++++++++++++ 8272>i Target CPU : MPC8280/8220/5200 (Zeppo) Target state : debug mode Debug entry cause : COP freeze (startup) Current PC : 0xfff00100 Current CR : 0x00000000 Current MSR : 0x00001042 Current LR : 0x00000000 8272>g 8272>h Target CPU : MPC8280/8220/5200 (Zeppo) Target state : debug mode Debug entry cause : COP halt Current PC : 0x07fe94c8 Current CR : 0x84002024 Current MSR : 0x0000b002 Current LR : 0x07fda464 8272>bi 0xc01554c8 (which is the start_kernel_address) Breakpoint identification is 1 8272>g - TARGET: stopped 8272>i Target CPU : MPC8280/8220/5200 (Zeppo) Target state : debug mode Debug entry cause : <reserved 0> Current PC : 0x001cbde4 Current CR : 0x24008084 Current MSR : 0x00003002 Current LR : 0x00000028 +++++++++++++++++++++++++++++++++++++++++++
Why the Current PC can not get the start_kernel address? How can i to debug the linux kernel? Any hits will be very appreciated!
BRG Alexander