[U-Boot-Users] A question of tftpboot
Hello,
I am using tftpboot to download the uImage. But I found if I use tftpboot 10000 uImage The image can be downloaded with no problem. But if I use tftpboot 1000 uImage Then it shows me execeptions as below:
******************************************************************** => tftp 1000 uImage-uncomp ENET Speed is 100 Mbps - HALF duplex connection TFTP from server 138.31.3.162; our IP address is 138.31.3.77 Filename 'uImage-uncomp'. Load address: 0x1000 Loading: #NIP: 00000000 XER: 20000000 LR: 00000000 REGS: 00fbb9d0 TRAP: 0700 DAR: 00FE0F60 MSR: 00001000 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00
GPR00: 00000003 00FBBAC0 40000000 00FBBAD0 0000001E 00000002 00FFADBC 00FFC1BC GPR08: 00000004 00FFB6BC FFFFFFFF 00FFC1BC 00FF968C 00000000 01002100 0175D000 GPR16: 00000000 00000000 00000000 00000000 00001000 00FBBAC0 00000000 00000000 GPR24: 00000000 00000000 00FBBF90 00000003 00000000 00FBBF60 01002B2C 00FFBF3C ** Illegal Instruction ** Call backtrace: Program Check Exception *****************************************************************
I checked the document but nothing mentioned about the load address of tftpboot. My question is, why I can download the image to 10000 while downloading to 1000 doesn't work?
Thanks, Frank
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In message BAY2-F1Ifd4nI8aOwxu000027d2@hotmail.com you wrote:
I am using tftpboot to download the uImage. But I found if I use tftpboot 10000 uImage The image can be downloaded with no problem. But if I use tftpboot 1000 uImage Then it shows me execeptions as below:
This is only to be expected. U-Boot follows UNIX design rules:
"UNIX was not designed to stop you from doing stupid things, because that would also stop you from doing clever things." - Doug Gwyn
I checked the document but nothing mentioned about the load address of tftpboot. My question is, why I can download the image to 10000 while downloading to 1000 doesn't work?
Read the documentation again. See for example section "Memory Manage- ment" in the README which explains pretty clear why overwriting the memory between 0x0000...0x2000 is NOT a good idea while U-Boot is running.
Best regards,
Wolfgang Denk
On Wed, Jul 07, 2004 at 02:20:02PM -0700, Frank Young wrote:
I checked the document but nothing mentioned about the load address of tftpboot. My question is, why I can download the image to 10000 while downloading to 1000 doesn't work?
What CPU do you have? If it is a PPC you probably still have the standard interrupt vectors down there. Check your start.S for where the handlers are setup. STD_EXCEPTION(0x1000, PIT, PITException);
participants (3)
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Andrew May -
Frank Young -
Wolfgang Denk