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comment Shell command to read device registers?
I think this route has potential, but it seems that there is a problem. This command executed as root: "dd if=/dev/mem bs=1 skip=10000 count=512" gives this error: "dd: /dev/mem: Bad address" I'm not sure what that means. Google tells me that it's something to do with changes introduced in the 2.6 kernel, but I don't understand enough about this yet to work around it.
Dec
21
comment Trouble getting busybox switch_root to work
Jackpot-- that worked exactly right. There was one other problem I had to solve (MMC driver needing a longer timeout) that kept it from working when I tried this previously, but with that fixed, it worked beautifully. Thanks.
Dec
21
accepted Trouble getting busybox switch_root to work
Dec
21
revised Trouble getting busybox switch_root to work
typo
Dec
21
asked Trouble getting busybox switch_root to work
Dec
20
comment Shell command to read device registers?
@Sen: Negative. I'm still stumped. I read the linked thread, which suggests that inw() doesn't do what I thought: "inb() and friends are only for emulation of the PCI and ISA IO address space." I've been using an oscilloscope and reading a lot of kernel driver code as my next best options.
Dec
17
asked Shell command to read device registers?
Dec
10
accepted How to generate initramfs image with busybox links?