The load address actually doesn't matter. You can tftp your uImage anywhere in RAM and then just give a bootm command. It will get the kernel and booting would happen fine. Though as I see in your bootargs you don't define a filesystem so kernel might hang there.
Anyways you should be able to boot the kernel. Hope this helps. -----Original Message----- From: u-boot-boun...@lists.denx.de [mailto:u-boot-boun...@lists.denx.de] On Behalf Of ogara Sent: Thursday, April 29, 2010 2:49 AM To: u-boot@lists.denx.de Subject: Re: [U-Boot] trying to bring linux-2.6.32.3 from RAM? I understand your point. My memory alignment was off. So now I get: ## Booting kernel from Legacy Image at 00000000 ... Image Name: Linux-2.6.32.3 Created: 2010-04-28 18:44:34 UTC Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 3131956 Bytes = 3 MB Load Address: 00008000 Entry Point: 00008000 Verifying Checksum ... OK ERROR: can't get kernel image! As I said before this file works of hard drive no problem (I just did binary comparison and file matches). Rick Ball wrote: > > Yes, but I think you need to load at address 0 instead of 0x8000, just > like I load at 0x80000000 instead of 0x80008000. My kernel is also > compiled to start at an offset of 0x8000, just like yours, but I think the > image has 0x8000 of reserved space at the beginning (so you load it to 0, > but it starts executing at 0x8000). > > I don't think the bootargs are even coming into play - you're executing a > bad instruction at 0x8008 because you loaded the kernel at 0x8000 instead > of 0 (so you're trying to execute the uninitialized reserved space). > > Try changing your tftp command to load at 0 instead of 0x8000, and I think > it should boot. > > Rick > > -----Original Message----- > From: u-boot-boun...@lists.denx.de [mailto:u-boot-boun...@lists.denx.de] > On Behalf Of ogara > Sent: Wednesday, April 28, 2010 3:26 PM > To: u-boot@lists.denx.de > Subject: Re: [U-Boot] trying to bring linux-2.6.32.3 from RAM? > > > Rick, > I have custom board with DRAM starting at 0x00000000 - 0x20000000 so I > could not load it to 0x80000000 since I do not have that much memory. I > noticed in your report that the load address is 0x80000000 but the kernel > image was built with: > Load Address: 80008000 > Entry Point: 80008000. > I was wondering what does your bootm command line looks like and if yours > bootargs look like mine? > Ogi > > > Rick Ball wrote: >> >> I think you want to load the kernel to memory at 0x00000000, even >> though the u-boot load address is set to 0x8000 - my kernel, which I >> load to memory at 0x80000000 because that's where my SDRAM is, looks like >> this: >> >> Load address: 0x80000000 >> Loading: >> ################################################################# >> >> ################################################################# >> >> ################################################################# >> >> ################################################################# >> >> ################################################################# >> >> ################################################################# >> ########################## >> done >> Bytes transferred = 2128612 (207ae4 hex) ## Booting kernel from Legacy >> Image at 80000000 ... >> Image Name: Linux-2.6.29-rc3-omap1 >> Image Type: ARM Linux Kernel Image (uncompressed) >> Data Size: 2128548 Bytes = 2 MB >> Load Address: 80008000 >> Entry Point: 80008000 >> Verifying Checksum ... OK >> Loading Kernel Image ... OK >> OK >> >> Starting kernel ... >> >> Uncompressing >> Linux................................................................... ........................................................................ >> done, booting the kernel. >> >> >> Rick >> >> -----Original Message----- >> From: u-boot-boun...@lists.denx.de >> [mailto:u-boot-boun...@lists.denx.de] >> On Behalf Of Marek Vasut >> Sent: Wednesday, April 28, 2010 2:35 PM >> To: u-boot@lists.denx.de >> Cc: ogara >> Subject: Re: [U-Boot] trying to bring linux-2.6.32.3 from RAM? >> >> Dne St 28. dubna 2010 20:50:35 ogara napsal(a): >>> Hi All, >>> I am trying to bring linux from RAM. I have compiled the kernel and >>> created uImage. I bring the image over tftp into the memory and then >>> execute bootm memaddress. Unfortunately here is the output from my >>> command line: >>> >>> tftp 0x8000 ipaddress:uImage >>> Using egiga0 device >>> TFTP from server ipaddress; our IP address is ipaddress; sending >>> through gateway ipaddress Filename 'uImage'. >>> Load address: 0x8000 >>> Loading: >>> ################################################################# >>> >>> ################################################################# >>> >>> ################################################################# >>> ################### >>> done >>> Bytes transferred = 3132020 (2fca74 hex) bootm 0x8000 ## Booting >>> kernel from Legacy Image at 00008000 ... >>> Image Name: Linux-2.6.32.3 >>> Created: 2010-04-28 18:44:34 UTC >>> Image Type: ARM Linux Kernel Image (uncompressed) >>> Data Size: 3131956 Bytes = 3 MB >>> Load Address: 00008000 >>> Entry Point: 00008000 >>> Verifying Checksum ... OK >>> XIP Kernel Image ... OK >>> OK >>> >>> Starting kernel ... >>> >>> undefined instruction >>> pc : [<00008008>] lr : [<00647d1c>] >>> sp : 005ffce8 ip : 000008e0 fp : 000006fc >>> r10: 00724db0 r9 : 005fff90 r8 : 005fffcc >>> r7 : 00000002 r6 : 0072372d r5 : 00000154 r4 : 00000000 >>> r3 : 00008000 r2 : 00000100 r1 : 000006fc r0 : 0001c200 >>> Flags: nZCv IRQs off FIQs off Mode SVC_32 Resetting CPU ... >>> >>> Now, the image is good for sure because I do not have issues bringing >>> this image from the hard drive. Do I need anything else (ftd or >>> ramdisc) to boot from RAM or the procedure presented is correct? >>> my bootargs are: >>> bootargs=console ttyS0,115200 root /dev/ram rw >>> >>> Thank you for your help, >>> Ogi >> >> Hi, the image is probably corrupted ? Also, why do you load it to 0x8000 >> ? >> It's relocated anyway, but this way it has to be relocated twice) >> _______________________________________________ >> U-Boot mailing list >> U-Boot@lists.denx.de >> http://lists.denx.de/mailman/listinfo/u-boot >> _______________________________________________ >> U-Boot mailing list >> U-Boot@lists.denx.de >> http://lists.denx.de/mailman/listinfo/u-boot >> >> > > -- > View this message in context: > http://old.nabble.com/trying-to-bring-linux-2.6.32.3-from-RAM--tp2839264 1p28393589.html > Sent from the Uboot - Users mailing list archive at Nabble.com. > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot > > -- View this message in context: http://old.nabble.com/trying-to-bring-linux-2.6.32.3-from-RAM--tp2839264 1p28394097.html Sent from the Uboot - Users mailing list archive at Nabble.com. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot