4 Apr
2019
4 Apr
'19
11:28 p.m.
On Thu, 4 Apr 2019 17:38:15 -0400
Gene Heskett <gheskett(a)shentel.net> wrote:
On Thursday 04 April 2019 17:16:04 E. Liddell wrote:
The pi is quite well-documented, except for the internals of a couple of
hardware blobs. The rock64 . . . a quick search suggests much less
documentation is available, and the detailed tech-spec stuff seems to be in
Chinese, which is no help. Scour /boot for the existing kernel, that's all I
can advise--it should be in there somewhere.
If you're still interested in setting up the pi, it expects to find the kernel
with a fixed filename in the boot partition. It also needs some auxiliary
files in there.
Here's what the boot section of the Gentoo image I assembled for my
pi3 looks like:
ryu ~ # ls -l /mnt/data/armchroot/boot/
total 16376
-rw-r--r-- 1 root root 15992 Dec 6 19:22 bcm2710-rpi-3-b.dtb
-rw-r--r-- 1 root root 50268 Dec 6 19:22 bootcode.bin
-rw-r--r-- 1 root root 48 Dec 6 20:42 cmdline.txt
-rw-r--r-- 1 root root 2527 Dec 6 19:22 fixup_cd.dat
-rw-r--r-- 1 root root 6635 Dec 6 19:22 fixup.dat
-rw-r--r-- 1 root root 9770 Dec 6 19:22 fixup_db.dat
-rw-r--r-- 1 root root 9768 Dec 6 19:22 fixup_x.dat
-rw-r--r-- 1 root root 4233216 Dec 6 19:09 kernel7.img
drwxr-xr-x 2 root root 4096 Dec 6 19:22 overlays
-rw-r--r-- 1 root root 641252 Dec 6 19:22 start_cd.elf
-rw-r--r-- 1 root root 4974116 Dec 6 19:22 start_db.elf
-rw-r--r-- 1 root root 2840612 Dec 6 19:22 start.elf
-rw-r--r-- 1 root root 3923364 Dec 6 19:22 start_x.elf
The kernel is kernel7.img (older pis may expect kernel.img instead).
The rest of the files are the pi's firmware packet, from github.
E. Liddell
On Thu, 4 Apr 2019 08:01:11 -0400
Gene Heskett <gheskett(a)shentel.net> wrote:
No clue, I built it for the rock64, on the rock64, useing the patches
from the linux-rt mailing list links, but when I asked how to install
it, 3 times over about as many weeks, and got ignored, I gave up. Their
propaganda says good support, but AFAIWC, there isn't any. But the pi
is only very marginally better. Bulding an rt kernel on the pi is a
several hour project, on the rock64 its about 30 minutes, which amply
demo's the difference in speeds. Too bad I cannot use it. Neither has
any docs available to aid the hacker. Those are proprietary designs.
Run the linux they supply, or go pound sand. Actually. jessie on the pi wasn't too bad. I
am
actually getting things done with it. But info on the wintel stuff
is common knowledge. Want to replace the armhf (pi) or arm64
(rock64) kernel with a realtime version? Nobody else sees the need,
so your questions get ignored, not answered by the people who do
have it all figured out. Thats BS.
For the pi, shouldn't it just be a matter of following your distro's
build-your- own-kernel instructions, using the pi-specific kernel
sources and base config, and applying the rt patchset on top?