visionfive2: add initial u-boot support

Regarding uEnv, note that this is simply a fork of the version from the
Debian based SDK image, only appended by setting the bootargs.

recipes-bsp/u-boot/u-boot-starfive/0001-riscv-fix-build-with-binutils-2.38.patch

@@ -0,0 +1,46 @@
+From 796732e49c919d74cab4978e517f02219daba9c4 Mon Sep 17 00:00:00 2001
+From: Andreas Cord-Landwehr <cordlandwehr@kde.org>
+Date: Sat, 7 Jan 2023 10:58:48 +0100
+Subject: [PATCH] riscv: fix build with binutils 2.38
+
+Original patch:
+https://lore.kernel.org/all/YhCvlHomlT2js3uO@ubuntu01/T/
+
+From version 2.38, binutils default to ISA spec version 20191213. This
+means that the csr read/write (csrr*/csrw*) instructions and fence.i
+instruction has separated from the `I` extension, become two standalone
+extensions: Zicsr and Zifencei.
+
+The fix is to specify those extensions explicitely in -march. However as
+older binutils version do not support this, we first need to detect
+that.
+
+Signed-off-by: Andreas Cord-Landwehr <cordlandwehr@kde.org>
+---
+ arch/riscv/Makefile | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
+index 0b80eb8d86..cd1bc49e7c 100644
+--- a/arch/riscv/Makefile
++++ b/arch/riscv/Makefile
+@@ -26,6 +26,16 @@ endif
+ 
+ ARCH_FLAGS = -march=$(ARCH_BASE)$(ARCH_A)$(ARCH_C) -mabi=$(ABI) \
+ 	     -mcmodel=$(CMODEL)
++RISCV_MARCH = $(ARCH_BASE)$(ARCH_A)$(ARCH_C)
++
++# Newer binutils versions default to ISA spec version 20191213 which moves some
++# instructions from the I extension to the Zicsr and Zifencei extensions.
++toolchain-need-zicsr-zifencei := $(call cc-option-yn, -mabi=$(ABI) -march=$(RISCV_MARCH)_zicsr_zifencei)
++ifeq ($(toolchain-need-zicsr-zifencei),y)
++	RISCV_MARCH := $(RISCV_MARCH)_zicsr_zifencei
++endif
++
++ARCH_FLAGS = -march=$(RISCV_MARCH) -mabi=$(ABI) -mcmodel=$(CMODEL)
+ 
+ PLATFORM_CPPFLAGS	+= $(ARCH_FLAGS)
+ CFLAGS_EFI		+= $(ARCH_FLAGS)
+-- 
+2.37.2
+

recipes-bsp/u-boot/u-boot-starfive/uEnv-visionfive2.txt

@@ -0,0 +1,14 @@
+fdt_high=0xffffffffffffffff
+initrd_high=0xffffffffffffffff
+kernel_addr_r=0x44000000
+kernel_comp_addr_r=0x90000000
+kernel_comp_size=0x10000000
+fdt_addr_r=0x48000000
+ramdisk_addr_r=0x48100000
+# Move distro to first boot to speed up booting
+boot_targets=distro mmc0 dhcp
+# Fix wrong fdtfile name
+fdtfile=starfive/jh7110-visionfive-v2.dtb
+# Fix missing bootcmd
+bootcmd=run bootcmd_distro
+bootargs=root=/dev/mmcblk1p2 rw console=tty0 console=ttyS0,115200 earlycon rootwait stmmaceth=chain_mode:1 selinux=0

recipes-bsp/u-boot/u-boot-starfive_v2021.04.bb

@@ -6,8 +6,10 @@ LIC_FILES_CHKSUM = "file://Licenses/README;md5=5a7450c57ffe5ae63fd732446b988025"
 FILESEXTRAPATHS:prepend := "${THISDIR}/files:"
 
 BRANCH:visionfive = "JH7100_VisionFive_OH_dev"
+BRANCH:visionfive2 = "JH7110_VisionFive2_devel"
 BRANCH:beaglev-starlight-jh7100 = "Fedora_JH7100_2021.04"
 
+
 SRC_URI = "git://github.com/starfive-tech/u-boot.git;protocol=https;branch=${BRANCH} \
            file://tftp-mmc-boot.txt \
           "
@@ -21,10 +23,17 @@ SRC_URI:append:visionfive = " \
            file://fix-riscv-isa.patch \
            file://uEnv-visionfive.txt \
 "
+SRC_URI:append:visionfive2 = " \
+           file://0001-riscv-fix-build-with-binutils-2.38.patch \
+           file://uEnv-visionfive2.txt \
+"
 
 SRCREV = "7b70e1d44ba9702a519ca936cabf19070309123a"
 SRCREV:visionfive = "ccecef294d355e9d05edf0bb6058002a0fe08908"
 
+# tag VF2_v2.6.0
+SRCREV:visionfive2 = "66a72185a813c36b8975fd7ded9d74d6a5525db7"
+
 DEPENDS:append = " u-boot-tools-native"
 
 # Overwrite this for your server
@@ -40,7 +49,11 @@ do_deploy:append:visionfive() {
     install -m 644 ${WORKDIR}/uEnv-visionfive.txt ${DEPLOYDIR}/uEnv.txt
 }
 
-COMPATIBLE_MACHINE = "(beaglev-starlight-jh7100|visionfive)"
+do_deploy:append:visionfive2() {
+    install -m 644 ${WORKDIR}/uEnv-visionfive2.txt ${DEPLOYDIR}/uEnv.txt
+}
+
+COMPATIBLE_MACHINE = "(beaglev-starlight-jh7100|visionfive|visionfive2)"
 
 TOOLCHAIN = "gcc"