Stephen Warren <swarren@xxxxxxxxxxxxx> writes: > On 04/24/2015 12:41 PM, Eric Anholt wrote: >> Stephen Warren <swarren@xxxxxxxxxxxxx> writes: >> >>> On 04/21/2015 12:09 PM, Eric Anholt wrote: >>>> This is my first submission of a Raspberry Pi 2 port. It can be found >>>> at https://github.com/anholt/linux/tree/bcm2836 >>>> >>>> I'm using the 2835 interrupt controller support, without adding the >>>> checks for ARM local interrupts first. That means no support for IPIs >>>> (and thus no SMP), no PMU events, and no local timer (I'm using the >>>> same 2835 peripheral one). >>>> >>>> It supports a similar featureset to Pi 1 at this point. Serial and SD >>>> cards work. Just one CPU supported. USB (ethernet) works if you use >>>> U-Boot, or my mailbox series >>>> (https://github.com/anholt/linux/tree/bcm2836-mbox). >>> >>> I can't quite get this to work. I think what's happening is that U-Boot >>> is over-writing the location of the code/data that the CPU1..3 pin loop >>> uses. Do you know what that address is so I can confirm that? >>> >>> I suspect this because when I load the kernel/DT in U-Boot, or when I >>> jump to the kernel to boot it, I see lots of extra duplicated characters >>> on the UART, like all 4 CPUs are booting Linux. For example: >> >> Oops, I was just extrapolating that U-Boot would work. I've quit using >> it because of the extra configuration work (particularly the compiled >> text files for the boot scripts). > > You don't need any compiled text files if you create an extlinux.conf > rather than a boot.scr. extlinux.conf is plain text. > > To boot without U-Boot: Could you say what's in your config.txt? I > assume I can just copy the kernel zImage as kernel.img, and the DTB from > the kernel build tree without renaming it? I've been explicitly naming the DTB in config.txt, haven't tested otherwise.
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