configs/beaglev_defconfig: new defconfig

This commit introduces support for the RISC-V based BeagleV platform,
which uses a Starfive JH7100.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
[yann.morin.1998@free.fr: use:  eval $(make printvars)]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

DEVELOPERS

@@ -2602,10 +2602,12 @@ F:	package/xorcurses/
 
 N:	Thomas Petazzoni <thomas.petazzoni@bootlin.com>
 F:	arch/Config.in.arm
+F:	board/beaglev/
 F:	board/stmicroelectronics/stm32mp157c-dk2/
 F:	boot/boot-wrapper-aarch64/
 F:	boot/grub2/
 F:	boot/gummiboot/
+F:	configs/beaglev_defconfig
 F:	configs/stm32mp157c_dk2_defconfig
 F:	package/android-tools/
 F:	package/b43-firmware/

board/beaglev/extlinux.conf

@@ -0,0 +1,4 @@
+label linux
+  kernel /boot/Image
+  devicetree /boot/starfive_vic7100_beagle_v.dtb
+  append console=ttyS0,115200 earlyprintk root=PARTUUID=0fef845a-c6e1-45bc-82f7-002fa720f958 rootwait

board/beaglev/genimage.cfg

@@ -0,0 +1,12 @@
+image sdcard.img {
+  hdimage {
+    gpt = true
+  }
+
+  partition rootfs {
+    partition-type-uuid = 72ec70a6-cf74-40e6-bd49-4bda08e8f224
+    partition-uuid = 0fef845a-c6e1-45bc-82f7-002fa720f958
+    bootable = "true"
+    image = "rootfs.ext4"
+  }
+}

board/beaglev/patches/uboot/0001-include-configs-starfive-vic7100-adjust-fdt_addr_r.patch

@@ -0,0 +1,39 @@
+From 2c4c813940c577590f3352cef0c49a8def17905d Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+Date: Wed, 28 Apr 2021 22:58:45 +0200
+Subject: [PATCH] include/configs/starfive-vic7100: adjust fdt_addr_r
+
+The default fdt_addr_r of 0x88000000 doesn't work, the kernel never
+boots. Using 0x90000000 works fine.
+
+Since it would overlap with the kernel_comp_addr_r area, this one is
+moved 16 MB further, at 0x91000000.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+---
+ include/configs/starfive-vic7100.h | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/include/configs/starfive-vic7100.h b/include/configs/starfive-vic7100.h
+index 8c5915a73c..7150a23873 100644
+--- a/include/configs/starfive-vic7100.h
++++ b/include/configs/starfive-vic7100.h
+@@ -111,13 +111,13 @@
+ 	"fdt_high=0xffffffffffffffff\0" \
+ 	"initrd_high=0xffffffffffffffff\0" \
+ 	"kernel_addr_r=0x84000000\0" \
+-	"fdt_addr_r=0x88000000\0" \
++	"fdt_addr_r=0x90000000\0" \
+ 	"scriptaddr=0x88100000\0" \
+ 	"script_offset_f=0x1fff000\0" \
+ 	"script_size_f=0x1000\0" \
+ 	"pxefile_addr_r=0x88200000\0" \
+ 	"ramdisk_addr_r=0x88300000\0" \
+-	"kernel_comp_addr_r=0x90000000\0" \
++	"kernel_comp_addr_r=0x91000000\0" \
+ 	"kernel_comp_size=0x10000000\0" \
+ 	"type_guid_gpt_loader1=" TYPE_GUID_LOADER1 "\0" \
+ 	"type_guid_gpt_loader2=" TYPE_GUID_LOADER2 "\0" \
+-- 
+2.30.2
+

board/beaglev/post-build.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+BOARD_DIR=$(dirname $0)
+
+# The DTB to use is provided within the U-Boot source tree, so we grab
+# it from there, and install it to TARGET_DIR/boot/.
+eval $(make -C ${CONFIG_DIR} --no-print-directory QUOTED_VARS=YES VARS=UBOOT_DIR printvars)
+install -D -m0644 ${UBOOT_DIR}/arch/riscv/dts/starfive_vic7100_beagle_v.dtb \
+	${TARGET_DIR}/boot/starfive_vic7100_beagle_v.dtb
+
+# Bring the extlinux.conf file in.
+install -D -m 0644 ${BOARD_DIR}/extlinux.conf \
+	${TARGET_DIR}/boot/extlinux/extlinux.conf
+
+# To be reflashed through Xmodem, the bootloader needs to be prepended
+# with a 4-byte header that contains the total size of the file.
+perl -e 'print pack("l", (stat @ARGV[0])[7])' ${BINARIES_DIR}/fw_payload.bin > ${BINARIES_DIR}/fw_payload.bin.out
+cat ${BINARIES_DIR}/fw_payload.bin >> ${BINARIES_DIR}/fw_payload.bin.out

board/beaglev/readme.txt

@@ -0,0 +1,88 @@
+BeagleV
+=======
+
+BeagleV is a low-cost RISC-V 64-bit based platform, powered by a
+Starfive JH7100 processor. The current defconfig in Buildroot has been
+tested with the JH7100 chip used on the beta version of the BeagleV
+board.
+
+How to build
+============
+
+$ make beaglev_defconfig
+$ make
+
+Build results
+=============
+
+After building, output/images contains:
+
++ Image
++ fw_payload.bin
++ fw_payload.bin.out
++ fw_payload.elf
++ rootfs.ext2
++ rootfs.ext4
++ sdcard.img
++ u-boot.bin
+
+The two important files are:
+
+ - fw_payload.bin.out, which is the bootloader image, containing
+   both OpenSBI and U-Boot.
+
+ - sdcard.img, the SD card image, which contains the root filesystem,
+   kernel image and Device Tree.
+
+Flashing the SD card image
+==========================
+
+$ sudo dd if=output/images/sdcard.img of=/dev/sdX
+
+Preparing the board
+===================
+
+Connect the Beagle-V fan to the 5V supply (pin 2 or 4 of the GPIO
+connector) and GND (pin 6 of the GPIO connector).
+
+Connect a TTL UART cable to pin 8 (TX), 10 (RX) and 14 (GND).
+
+Insert your SD card.
+
+Power-up the board using an USB-C cable.
+
+Flashing the bootloader
+=======================
+
+The bootloader pre-flashed on the Beagle-V has a non-working
+fdt_addr_r environment variable value, so it won't work
+as-is. Reflashing the bootloader with the bootloader image produced by
+Buildroot is necessary.
+
+When the board starts up, a pre-loader shows a count down of 2
+seconds, interrupt by pressing any key. You should reach a menu like
+this:
+
+--------8<----------
+
+bootloader version:210209-4547a8d
+ddr 0x00000000, 1M test
+ddr 0x00100000, 2M test
+DDR clk 2133M,Version: 210302-5aea32f
+0
+***************************************************
+*************** FLASH PROGRAMMING *****************
+***************************************************
+
+0:update uboot
+1:quit
+select the function:
+
+--------8<----------
+
+Press 0 and Enter. You will now see "C" characters being
+displayed. Ask your serial port communication program to send
+fw_payload.bin.out using the Xmodem protocol.
+
+After reflashing is complete, restart the board, it will automatically
+start the system from the SD card, and reach the login prompt.

configs/beaglev_defconfig

@@ -0,0 +1,35 @@
+BR2_riscv=y
+BR2_riscv_custom=y
+BR2_RISCV_ISA_CUSTOM_RVM=y
+BR2_RISCV_ISA_CUSTOM_RVF=y
+BR2_RISCV_ISA_CUSTOM_RVD=y
+BR2_RISCV_ISA_CUSTOM_RVC=y
+BR2_GLOBAL_PATCH_DIR="board/beaglev/patches/"
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
+BR2_ROOTFS_POST_BUILD_SCRIPT="board/beaglev/post-build.sh"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/beaglev/genimage.cfg"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
+# HEAD of the Fedora branch
+BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,starfive-tech,linux,710cf052d6abda73584481d920b4b6befc7240ea)/linux-710cf052d6abda73584481d920b4b6befc7240ea.tar.gz"
+BR2_LINUX_KERNEL_DEFCONFIG="starfive_vic7100_evb_sd_net"
+BR2_LINUX_KERNEL_INSTALL_TARGET=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+# BR2_TARGET_ROOTFS_TAR is not set
+BR2_TARGET_OPENSBI=y
+BR2_TARGET_OPENSBI_CUSTOM_TARBALL=y
+# HEAD of the Fedora branch
+BR2_TARGET_OPENSBI_CUSTOM_TARBALL_LOCATION="$(call github,starfive-tech,opensbi,2524b0ecd8684b42bc7a4c69794f40f11cbbe2a5)/opensbi-2524b0ecd8684b42bc7a4c69794f40f11cbbe2a5.tar.gz"
+BR2_TARGET_OPENSBI_PLAT="starfive/vic7100"
+# BR2_TARGET_OPENSBI_INSTALL_DYNAMIC_IMG is not set
+# BR2_TARGET_OPENSBI_INSTALL_JUMP_IMG is not set
+BR2_TARGET_OPENSBI_UBOOT_PAYLOAD=y
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
+BR2_TARGET_UBOOT_CUSTOM_TARBALL=y
+# HEAD of the Fedora branch
+BR2_TARGET_UBOOT_CUSTOM_TARBALL_LOCATION="$(call github,starfive-tech,u-boot,3f3ac01a29ad1cd5fa519d86f81daead2447f1d4)/uboot-3f3ac01a29ad1cd5fa519d86f81daead2447f1d4.tar.gz"
+BR2_TARGET_UBOOT_BOARD_DEFCONFIG="starfive_vic7100_beagle_v_smode"
+BR2_PACKAGE_HOST_GENIMAGE=y