Hi, I am having an EP8260 board. And I got a zImage binary from TimeSys linux(2.4.7). The board comes with a bootloader and diagnostics.
The TimeSys linux gives me a binary called zImage.initrd.bin-2.4.7-timesys-3.1.180-ep8260. I am trying to boot the kernel using the bootloader given by the PlanetCore guys. The kernel was the one which I got from TimeSys. But this kernel doesn't come up(It hangs). Then I tried modifying a few lines of assembly code(arch/ppc/boot/mbx/head_8260.S) to find the problem. The board always goes for a reset when I run my code. I get the initial prints regarding the loaded at: 00800000 0080C27C relocated to: 00400000 0040C27C board data at: F0003000 F0003034 relocated to: 0040C148 0040C17C zimage at: 0080C27C 008C6253 avail ram: 008C7000 04000000 And then the "Uncompress kernel"and "Now booting kernel" prints are seen and then the board goes for a reset. The embed_config, decompress_kernel functions are run correctly. I could come to this conclusion from the dump of the first few bytes of memory. These were exactly identical to the "disassembled code of vmlinux". The head_8260.S is followed by the head.S code in arch/ppc/kernel. What I found is that I am able to jump to the diagnostics of the PlanetCore just before entering the "_start" of arch/ppc/kernel. But I am not able to jump to the diagnostics just after entering the "_start" of the kernel head.S. How do I debug this problem, I know that the first few bytes of SDRAM are exactly what was expected. These values I dumped. Then what is the problem in jumping to that location. With my binary, the board goes for a reset. Please help. D.Deepesh ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
