Dear Alexander,
In message CABtOAfzG3B-eis0nDOiYtdq2rig_wP6SF2_jz=NLWw7Gp+PE2A@mail.gmail.com you wrote:
link to my u-boot https://github.com/fedya/u-boot-yse5250
Sorry, but I do not really care about out of tree code.
Changed to this bootcmd=md 40800000 10;imi 40800000;bootm 40800000
OK, lets's go through this step by step.
Note that
[YSE5250@omv]# boot 40800000: 56190527 ba6b0d61 9850d952 08484800 '..Va.k.R.P..HH. 40800010: 00800040 00800040 8a221c4c 00020205 @...@...L."..... 40800020: 756e694c 2e332d78 302e3331 3863722d Linux-3.13.0-rc8 40800030: 00000000 00000000 00000000 00000000 ................
The header (struct image_header) is defined in "include/image.h". we have:
237 typedef struct image_header { 238 __be32 ih_magic; /* Image Header Magic Number */ 56190527 => 0x27051956 OK 239 __be32 ih_hcrc; /* Image Header CRC Checksum */ ba6b0d61 240 __be32 ih_time; /* Image Creation Timestamp */ 9850d952 => 0x52d95098 = 1389973656 = Fri Jan 17 16:47:36 2014 241 __be32 ih_size; /* Image Data Size */ 08484800 => 0x00484808 = 4737032 242 __be32 ih_load; /* Data Load Address */ 00800040 = 0x40008000 OK 243 __be32 ih_ep; /* Entry Point Address */ 00800040 = 0x40008000 OK 244 __be32 ih_dcrc; /* Image Data CRC Checksum */ 8a221c4c 245 uint8_t ih_os; /* Operating System */ 05 = IH_OS_LINUX OK 246 uint8_t ih_arch; /* CPU architecture */ 02 = IH_ARCH_ARM OK 247 uint8_t ih_type; /* Image Type */ 02 = IH_TYPE_KERNEL OK 248 uint8_t ih_comp; /* Compression Type */ 00 = IH_COMP_NONE OK 249 uint8_t ih_name[IH_NMLEN]; /* Image Name */ Linux-3.13.0-rc8 250 } image_header_t;
This all looks perfectly OK to me.
## Checking Image at 40800000 ... Legacy image found Image Name: Linux-3.13.0-rc8 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 4737032 Bytes = 4626 KiB Load Address: 40008000 Entry Point: 40008000 Verifying Checksum ... OK
This is the "iminfo" output. All looks perfectly fine. Note especially that the image gets correctly decoded as "ARM Linux Kernel Image (uncompressed)".
## Booting kernel from Legacy Image at 40800000 ... Image Name: Linux-3.13.0-rc8 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 4737032 Bytes = 4626 KiB Load Address: 40008000 Entry Point: 40008000 Verifying Checksum ... OK
This is the regular "bootm" image output. So far it looks perfectly fine.
kernel data at 0x40800040, len = 0x00484808 (4737032) ## No init Ramdisk ramdisk start = 0x00000000, ramdisk end = 0x00000000 Loading Kernel Image ... OK OK kernel loaded at 0x40008000, end = 0x4048c808
0x40008000 + 0x00484808 (size) = 0x4048c808 ==> looks perfectly fine, too, and is far enough away from your load address at 40800000
ERROR: booting os 'Unknown OS' (1) is not supported
This code comes from "common/cmd_bootm.c":
691 if (boot_fn == NULL && need_boot_fn) { 692 if (iflag) 693 enable_interrupts(); 694 printf("ERROR: booting os '%s' (%d) is not supported\n", 695 genimg_get_os_name(images->os.os), images->os.os); ...
images->os.os has the value 1 here, not the expected 5 (IH_OS_LINUX) we had before. Somenting must have overwritten the header information / parts of your RAM.
movi
string from help
movi - movi - sd/mmc r/w sub system for SMDK board
and same command for o-droid http://lists.denx.de/pipermail/u-boot/2013-February/146047.html
I have not the lightest idea why they would invent something new instead of what is being used in mainline.
I have no idea where your memory gets corrupted, or why, and with out-of-tree code it's difficult to even guess. But there is a good chance that parts of your code base are simply broken.
If I were you, I would run this code under control of GDB (with a JTAG debugger attached). Then set a watchpoint on the images.os.os address and check where it gets corrupted.
Best regards,
Wolfgang Denk