bpi_f3: add support for the banana pi f3 riscv64 sbc - wip

this looks like some nice hardware with rvv 1.0 vector extensions, 8
cores etc. and it feels a bit snappier than the starfive visionfive2

this is just some initial bringup of support for it:
- legacy bpi v6.1.15-k1 kernel used
- boot blocks, opensbi and u-boot taken from the bpi f3 armbian image
- no gpu support as just quite broken legacy driver
- xorg is running in framebuffer mode, but quite useable this way
- booting is done via some hacks based on the legacy boot setup, but
  adjusted so that regular kernel can be booted
- boot setup is reusing the uEnv.ini idea from amlogic_m8
- lots of stuff missing and not perfect yet
- it boots and runs and provides a clean debian sid image

systems/bpi_f3/arch.txt

@@ -0,0 +1 @@
+riscv64

systems/bpi_f3/extra-files/boot/env_k1-x.txt

@@ -0,0 +1,28 @@
+bootdelay=5
+baudrate=115200
+stderr=serial
+stdin=serial,usbkbd
+stdout=serial
+# we can easily use the initrd load addr here as the mem is not used after
+# the uEnv.ini import anymore and that happens before the inird load
+uenv_ini_addr=0x20000000
+kernel_addr=0x10000000
+initrd_addr=0x20000000
+dtb_addr=0x1F000000
+
+# import the uEnv.ini file with all the changable values
+# filesize is set automatically after the load it seems
+import_uenv_ini=echo "importing uEnv.ini ...";\
+  load mmc 0:1 ${uenv_ini_addr} uEnv.ini;\
+  env import -t ${uenv_ini_addr} ${filesize};
+
+bootcmd=run import_uenv_ini;\
+  echo "loading kernel ...";\
+  load mmc 0:1 ${kernel_addr} Image-${kver};\
+  echo "loading dtb ...";\
+  load mmc 0:1 ${dtb_addr} dtb-${kver}/${dtb_name};\
+  echo "loading ramdisk ...";\
+  load mmc 0:1 ${initrd_addr} initrd.img-${kver};\
+  setenv initrd_info ${initrd_addr}:${filesize};\
+  echo "booting ...";\
+  booti ${kernel_addr} ${initrd_info} ${dtb_addr};

systems/bpi_f3/extra-files/boot/uEnv.ini

@@ -0,0 +1,7 @@
+# this file gets imported into env_k1-x.txt which is getting imported by the bootloader
+# kernel version
+kver=KERNEL_VERSION
+# tested to be working on a bpi f3 4gb ram and 16gb emmc
+dtb_name=k1-x_deb1.dtb
+# kernel cmdline
+bootargs=earlycon=sbi earlyprintk console=tty1 console=ttyS0,115200 loglevel=8 clk_ignore_unused swiotlb=65536 board=bpi-f3 rdinit=/init root=/dev/mmcblk0p2 rootwait ro fsck.fix=yes fsck.repair=yes net.ifnames=0 ipv6.disable=1 selinux=0 apparmor=0

systems/bpi_f3/extra-files/etc/initramfs-tools/conf.d/compress

@@ -0,0 +1,2 @@
+COMPRESS=xz
+XZ_OPT='-9 --check=crc32 -memlimit-compress=25%'

systems/bpi_f3/extra-files/etc/initramfs-tools/hooks/firmware

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -e
+
+PREREQ=""
+
+prereqs()
+{
+	echo "${PREREQ}"
+}
+
+case "${1}" in
+	prereqs)
+		prereqs
+		exit 0
+		;;
+esac
+
+. /usr/share/initramfs-tools/hook-functions
+
+mkdir -p ${DESTDIR}/lib/firmware
+cp -a /lib/firmware/esos.elf ${DESTDIR}/lib/firmware

systems/bpi_f3/finalize-chroot.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+# write the special boot header at the beginning of the disk back as
+# it seems to get overwritten when creating the partitions with fdisk
+dd if=/boot/extra/boot-bpi-f3-armbian.dd of=/dev/loop0 bs=1 count=68 status=progress

systems/bpi_f3/get-files.sh

@@ -0,0 +1,21 @@
+# this file is supposed to be sourced by the get-files shell script
+
+bpi_f3_release_version="6.1.15-bf3-001+"
+bpi_f3_boot_version="6.1.15-bf3-001+"
+bpi_f3_firmware_version="6.1.15-bf3-001+"
+
+rm -f ${DOWNLOAD_DIR}/kernel-bpi_f3-${2}.tar.gz
+wget -v https://github.com/hexdump0815/linux-spacemit-k1-kernel/releases/download/${bpi_f3_release_version}/${bpi_f3_release_version}.tar.gz -O ${DOWNLOAD_DIR}/kernel-bpi_f3-${2}.tar.gz
+
+rm -f ${DOWNLOAD_DIR}/boot-bpi_f3-${2}.dd
+wget -v https://github.com/hexdump0815/linux-spacemit-k1-kernel/raw/${bpi_f3_boot_version}/misc.bf3/misc/boot-bpi-f3-armbian.dd.gz -O - | gunzip -c > ${DOWNLOAD_DIR}/boot-bpi_f3-${2}.dd
+
+# the boot blocks
+rm -rf ${DOWNLOAD_DIR}/boot-extra-${1}
+mkdir -p ${DOWNLOAD_DIR}/boot-extra-${1}
+cp ${DOWNLOAD_DIR}/boot-bpi_f3-${2}.dd ${DOWNLOAD_DIR}/boot-extra-${1}/boot-bpi-f3-armbian.dd
+
+# the required remoteproc firmware
+rm -rf ${DOWNLOAD_DIR}/postinstall-${1}
+mkdir -p ${DOWNLOAD_DIR}/postinstall-${1}
+wget -v https://github.com/hexdump0815/linux-spacemit-k1-kernel/raw/${bpi_f3_firmware_version}/misc.bf3/misc/firmware/esos.elf.gz -O - | gunzip -c > ${DOWNLOAD_DIR}/postinstall-${1}/esos.elf

systems/bpi_f3/mbr-partitions.txt

@@ -0,0 +1,19 @@
+o
+n
+p
+1
+204800
++512M
+t
+ea
+n
+p
+2
+1253376
+
+t
+2
+83
+p
+w
+

systems/bpi_f3/partition-mapping.txt

@@ -0,0 +1,4 @@
+BOOTFS=fat
+ROOTFS=btrfs
+BOOTPART=1
+ROOTPART=2

systems/bpi_f3/postinstall.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# this is something for later when the gpu is working well
+#cp -v etc/X11/xorg.conf.d.samples/11-modesetting-no-glamor.conf etc/X11/xorg.conf.d
+#cp -v etc/X11/xorg.conf.d.samples/13-pvr-swapped-dri-nodes.conf etc/X11/xorg.conf.d
+
+# in the meantime lets use the framebuffer for xorg - not fancy, but shoudl work well
+cp -v etc/X11/xorg.conf.d.samples/11-fbdev.conf etc/X11/xorg.conf.d
+
+# install the required remoteproc firmware
+cp -v postinstall/esos.elf lib/firmware

systems/bpi_f3/readme.md

@@ -0,0 +1,34 @@
+# banana pi f3
+
+## bootable sd card images
+
+- none yet
+
+## tested systems - working
+
+- banana pi f3 (4gb ram / 16gb emmc version running from sd card)
+
+## untested systems
+
+- banana pi f3 (2gb ram / 8gb emmc version)
+
+## kernel build notes
+
+- https://github.com/hexdump0815/linux-spacemit-k1-kernel/blob/main/readme.bf3
+
+## u-boot build notes
+
+- none yet as for now the vendor u-boot on the sd card is used
+
+## mesa build notes
+
+- none yet, but will come once its time to look closer at gpu support
+
+## priority
+
+- medium: some first experiments with a useable riscv64 sbc
+
+## special notes
+
+- all this is very much wip and not that useable yet
+- more info coming soon

systems/bpi_f3/todo.txt

@@ -0,0 +1 @@
+- lots of things to be done, but nothing noted down here yet ...