Am Sun, 30 Oct 2022 19:32:17 +0100 schrieb Diederik de Haas <didi.debian@cknow.org>: > On Sunday, 30 October 2022 18:04:28 CET Sebastian Kuzminsky wrote: > > The Raspbian Buster armhf binaries can be made to run on Debian > > Bookworm arm64 with a little bit of coaxing, but they rely on > > kernel features that are not in Bookworm's arm64 kernel > > Do you know which kernel features? > I can then create a MR to get those enabled in Debian's Bookworm > kernel. I got this working some time ago. I used a mainline kernel with PREEMPT RT and a CAN driver over SPI. https://forums.raspberrypi.com/viewtopic.php?t=329789 and https://forums.raspberrypi.com/viewtopic.php?t=338859 I use uboot to apply the overlay. It is important that the DTCs are compiled with the "-@" option. I compile the kernel on my amd64 machine with time ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- DTC_FLAGS="-@" make deb-pkg -j16 With u-boot i use the extlinux boot configuration with a custom patch that got sadly not accepted (or maybe igored) from u-boot upstream. With that patch i can apply the overlays on raspi. The patch is based on u-boot 2021.07. set the distro_bootcmd to your partition. This can be tricky if you are not expierenced with u-boot. In my case it looks like setenv distro_bootcmd="sysboot mmc 0:3 any 0x02400000 /boot/extlinux/extlinux.conf" saveenv reset over the uart at the bootup. 0x02400000 is explained by the other vars. As far as i remember it is the load address for the extlinux.conf file. mmc 0:3 = first mmc thired partition. My layout is: 1: firmware (u-boot and the basic fdts also the u-boot environment) 2: swap 3: root The default debian kernel works but the device tree is not compiled with "-@". So you cant apply any overlays. ovmerge, i downloaded from the raspi Site https://github.com/raspberrypi/utils/blob/master/ovmerge/ovmerge Hope that helps :) Best regards Georg
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Description: audio/vnd.dts
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Description: application/shellscript
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rtc.dts
Description: audio/vnd.dts
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spidev3.dts
Description: audio/vnd.dts
>From cc3c2d4ee591414c368b667b33b4b24b36f6fbb8 Mon Sep 17 00:00:00 2001
From: Georg Gast <georg@schorsch-tech.de>
Date: Sat, 8 Jan 2022 06:01:19 +0100
Subject: [PATCH] Enable RaspberryPi arm64 to netboot a compressed kernel
image.
This changes add
- kernel_comp_addr_r=0x0800000
- kernel_comp_size=0x0800000
to the default environment of the raspberry pi. With these two options
u-boot can uncompress a received compressed kernel and boot it.
I could just test these changes on raspberry pi 4B with 8GB of ram.
See the attached logs.
U-Boot 2021.10-dirty (Jan 08 2022 - 05:57:42 +0100)
DRAM: 7.9 GiB
RPI 4 Model B (0xd03114)
MMC: mmc@7e300000: 0, mmc@7e340000: 1
Loading Environment from FAT... Card did not respond to voltage select! : -110
In: serial
Out: vidconsole
Err: vidconsole
Net: eth0: ethernet@7d580000
PCIe BRCM: link up, 5.0 Gbps x1 (SSC)
starting USB...
Bus usb@7e980000: USB DWC2
Bus xhci_pci: Register 5000420 NbrPorts 5
Starting the controller
USB XHCI 1.00
scanning bus usb@7e980000 for devices... 1 USB Device(s) found
scanning bus xhci_pci for devices... Failed to get keyboard state from device 1997:2433
2 USB Device(s) found
scanning usb for storage devices... 0 Storage Device(s) found
Hit any key to stop autoboot: 0
U-Boot> setenv boot_targets "dhcp pxe"
U-Boot> boot
georg@rpi64-test:~$ dmesg
[ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd083]
[ 0.000000] Linux version 5.15.10-rt24-v8 (georg@hammerhead) (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2) #1 SMP PREEMPT_RT Wed Jan 5 21:06:46 CET 2022
[ 0.000000] Machine model: Raspberry Pi 4 Model B Rev 1.4
[ 0.000000] efi: UEFI not found.
[ 0.000000] Reserved memory: created CMA memory pool at 0x0000000037400000, size 64 MiB
[ 0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x0000000000000000-0x000000003fffffff]
[ 0.000000] DMA32 [mem 0x0000000040000000-0x00000000ffffffff]
[ 0.000000] Normal [mem 0x0000000100000000-0x00000001ffffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x000000003b3fffff]
[ 0.000000] node 0: [mem 0x0000000040000000-0x00000000fbffffff]
[ 0.000000] node 0: [mem 0x0000000100000000-0x00000001ffffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x00000001ffffffff]
[ 0.000000] percpu: Embedded 27 pages/cpu s73392 r8192 d29008 u110592
[ 0.000000] pcpu-alloc: s73392 r8192 d29008 u110592 alloc=27*4096
[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[ 0.000000] Detected PIPT I-cache on CPU0
[ 0.000000] CPU features: detected: Spectre-v2
[ 0.000000] CPU features: detected: Spectre-v4
[ 0.000000] CPU features: detected: ARM errata 1165522, 1319367, or 1530923
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 2028848
[ 0.000000] Kernel command line: rw console=ttyAMA0,115200u8 console=tty1 earlyprintk root=/dev/nfs nfsroot=192.168.160.19:/srv/netboot/rpi64/rootfs ip=192.168.160.42:192.168.160.19:192.168.160.1::rpi64-test.schorsch-tech.de nfsrootdebug
[ 0.000000] Unknown kernel command line parameters "earlyprintk nfsrootdebug", will be passed to user space.
---
include/configs/rpi.h | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/configs/rpi.h b/include/configs/rpi.h
index 522b41c02d..41cd721f6e 100644
--- a/include/configs/rpi.h
+++ b/include/configs/rpi.h
@@ -151,6 +151,9 @@
* Even with the smallest possible CPU-GPU memory split of the CPU getting
* only 64M, the remaining 25M starting at 0x02700000 should allow quite
* large initrds before they start colliding with U-Boot.
+ *
+ * The kernel uncompression area is placed at 0x0800000 with 0x0800000 bytes.
+ * Even the first rpi had just 256M of RAM. This should be still work on it.
*/
#define ENV_MEM_LAYOUT_SETTINGS \
"fdt_high=" FDT_HIGH "\0" \
@@ -159,7 +162,10 @@
"scriptaddr=0x02400000\0" \
"pxefile_addr_r=0x02500000\0" \
"fdt_addr_r=0x02600000\0" \
- "ramdisk_addr_r=0x02700000\0"
+ "fdtoverlay_addr_r=0x026A0000\0" \
+ "ramdisk_addr_r=0x02700000\0" \
+ "kernel_comp_addr_r=0x0800000\0" \
+ "kernel_comp_size=0x0800000\0"
#if CONFIG_IS_ENABLED(CMD_MMC)
#define BOOT_TARGET_MMC(func) \
--
2.30.2
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