boot-utils: Add support for RISCV

README.txt

@@ -14,6 +14,7 @@ Required parameters:
        * ppc32
        * ppc64
        * ppc64le
+       * riscv
        * x86
        * x86_64
 

boot-qemu.sh

@@ -29,7 +29,7 @@ function parse_parameters() {
             -a | --arch | --architecture)
                 shift
                 case ${1} in
-                    arm32_v5 | arm32_v6 | arm32_v7 | arm64 | mips | mipsel | ppc32 | ppc64 | ppc64le | x86 | x86_64) ARCH=${1} ;;
+                    arm32_v5 | arm32_v6 | arm32_v7 | arm64 | mips | mipsel | ppc32 | ppc64 | ppc64le | riscv | x86 | x86_64) ARCH=${1} ;;
                     *) die "Invalid --arch value '${1}'" ;;
                 esac
                 ;;
@@ -186,6 +186,17 @@ function setup_qemu_args() {
             QEMU=(qemu-system-ppc64)
             ;;
 
+        riscv)
+            KIMAGE=Image
+            DEB_BIOS=/usr/lib/riscv64-linux-gnu/opensbi/qemu/virt/fw_jump.elf
+            [[ -f ${DEB_BIOS} && -z ${BIOS} ]] && BIOS=${DEB_BIOS}
+            QEMU_ARCH_ARGS=(
+                -bios "${BIOS:-default}"
+                -M virt
+            )
+            QEMU=(qemu-system-riscv64)
+            ;;
+
         x86 | x86_64)
             KIMAGE=bzImage
             APPEND_STRING+="console=ttyS0 "

buildroot/rebuild.sh

@@ -32,7 +32,7 @@ CONFIGS=()
 while ((${#})); do
     case ${1} in
         all) for CONFIG in *.config; do CONFIGS+=("../${CONFIG}"); done ;;
-        arm64 | arm | mips | mipsel | ppc32 | ppc64 | ppc64le | x86 | x86_64) CONFIGS+=("../${1}.config") ;;
+        arm64 | arm | mips | mipsel | ppc32 | ppc64 | ppc64le | riscv | x86 | x86_64) CONFIGS+=("../${1}.config") ;;
         *) die "Unknown parameter '${1}', exiting!" ;;
     esac
     shift

buildroot/riscv.config

@@ -0,0 +1,10 @@
+BR2_riscv=y
+BR2_OPTIMIZE_3=y
+BR2_BINUTILS_VERSION_2_31_X=y
+BR2_TARGET_GENERIC_ROOT_PASSWD="root"
+BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
+BR2_ROOTFS_OVERLAY="../overlay-poweroff"
+BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
+BR2_PACKAGE_BASH=y
+BR2_TARGET_ROOTFS_CPIO=y
+# BR2_TARGET_ROOTFS_TAR is not set