b**r
发帖数: 352 | 1 I have a circuit board based on ARM926EJS, it was working fine with 128MB
DDR2. I just changed to a 256MB chip, the kernel boots ok if I only use the
lower 128MB. but will hang right after "booting the kernel" if I try to use
more, say 130MB.
I can r/w to the upper 128MB in uboot without any problem though.
I am trying to locate where the kernel hangs. I turned on DEBUG in head.S,
which didn't reveal anything usual. How can I get more debug info? | N****w
发帖数: 21578 | 2 any output on screen or RS-232 serial terminal? | s****n
发帖数: 786 | 3 如果u-boot里可以访问high 128M,查kernel tree
基本肯定是local bus访问无效地址造成kernel崩溃，看mmu相关的mmap register，很
久没摸arm，忘了具体内容，查manual
the
use
【在 b**r 的大作中提到】
: I have a circuit board based on ARM926EJS, it was working fine with 128MB
: DDR2. I just changed to a 256MB chip, the kernel boots ok if I only use the
: lower 128MB. but will hang right after "booting the kernel" if I try to use
: more, say 130MB.
: I can r/w to the upper 128MB in uboot without any problem though.
: I am trying to locate where the kernel hangs. I turned on DEBUG in head.S,
: which didn't reveal anything usual. How can I get more debug info?
| b**r
发帖数: 352 | 4 Thanks for the replies.
I've enabled CONFIG_DEBUG_LL, inserted some printascii() into codes. I
narrowed it down to bootmem_init(). Trying to understand the code right now. |
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