recipes-bsp: Add u-boot-xlnx scripts for Xen support

Add new boot.cmd.xen to u-boot-xlnx-scr bbappend to enable
Xen support for ZynqMP and Versal devices.

User can enable xen u-boot script by adding below variable from
configuration file.

BOOTMODE = "xen"

This u-boot script also supports to configure below Xen params from
configuration file

params          variable assignment
------          -------------------
duart           XEN_SERIAL_CONSOLES = "serial0"
dom0_mem        DOM0_MEM = "1500M"
dom0_max_vcpus  DOM0_MAX_VCPUS = "1"
extra params    XEN_CMDLINE_APPEND = "loglvl=all"

Signed-off-by: Sandeep Gundlupet Raju <sandeep.gundlupet-raju@amd.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/dynamic-layers/xilinx/recipes-bsp/u-boot/u-boot-xlnx-scr/boot.cmd.xen b/dynamic-layers/xilinx/recipes-bsp/u-boot/u-boot-xlnx-scr/boot.cmd.xen
new file mode 100644
index 00000000..25e5842c
--- /dev/null
+++ b/dynamic-layers/xilinx/recipes-bsp/u-boot/u-boot-xlnx-scr/boot.cmd.xen
@@ -0,0 +1,80 @@
+# This is a boot script for U-Boot with Xen parameters used by yocto machine
+# configuration file.
+# Generate boot.scr:
+# mkimage -c none -A arm -T script -d boot.cmd.xen boot.scr
+#
+################
+xen_name=@@XEN_IMAGE_NAME@@
+kernel_name=@@KERNEL_IMAGE@@
+rootfs_name=@@RAMDISK_IMAGE@@
+@@PRE_BOOTENV@@
+
+for boot_target in ${boot_targets};
+do
+        echo "Trying to load boot images from ${boot_target}"
+        if test "${boot_target}" = "jtag" ; then
+                tftpboot @@KERNEL_LOAD_ADDRESS@@ ${kernel_name}
+                setenv kernel_size 0x$filesize;
+                tftpboot @@RAMDISK_IMAGE_ADDRESS@@ ${rootfs_name}
+                setenv ramdisk_size 0x$filesize;
+                tftpboot @@XEN_LOAD_ADDRESS@@ ${xen_name}
+                tftpboot @@DEVICETREE_ADDRESS@@ system.dtb
+        fi
+        if test "${boot_target}" = "mmc0" || test "${boot_target}" = "mmc1" || test "${boot_target}" = "usb0" || test "${boot_target}" = "usb1"; then
+                if test "${boot_target}" = "mmc0" || test "${boot_target}" = "mmc1"; then
+                        setenv bootdev mmcblk${devnum}p
+                fi
+                if test "${boot_target}" = "usb0" || test "${boot_target}" = "usb1"; then
+                        setenv bootdev sda
+                fi
+                echo "Checking for /${xen_name}"
+                if test -e ${devtype} ${devnum}:${distro_bootpart} /${xen_name}; then
+                        echo "Loading ${xen_name}";
+                        fatload ${devtype} ${devnum}:${distro_bootpart} @@XEN_LOAD_ADDRESS@@ ${xen_name};
+                fi
+                echo "Checking for /${kernel_name}"
+                if test -e ${devtype} ${devnum}:${distro_bootpart} /${kernel_name}; then
+                        echo "Loading ${kernel_name}";
+                        fatload ${devtype} ${devnum}:${distro_bootpart} @@KERNEL_LOAD_ADDRESS@@ ${kernel_name};
+                        setenv kernel_size 0x$filesize;
+                fi
+                echo "Checking for /system.dtb"
+                if test -e ${devtype} ${devnum}:${distro_bootpart} /system.dtb; then
+                        echo "Loading system.dtb";
+                        fatload ${devtype} ${devnum}:${distro_bootpart} @@DEVICETREE_ADDRESS@@ system.dtb;
+                fi
+                echo "Checking for /${rootfs_name}"
+                if test -e ${devtype} ${devnum}:${distro_bootpart} /${rootfs_name} && test "${skip_ramdisk}" != "yes"; then
+                        echo "Loading ${rootfs_name}";
+                        fatload ${devtype} ${devnum}:${distro_bootpart} @@RAMDISK_IMAGE_ADDRESS@@ ${rootfs_name};
+                        setenv ramdisk_size 0x$filesize;
+                fi
+        fi
+        fdt addr @@DEVICETREE_ADDRESS@@
+        fdt resize 0x1000
+        fdt get value bootargs /chosen bootargs
+        fdt set /chosen \#address-cells <0x2>
+        fdt set /chosen \#size-cells <0x2>
+        setenv xen_bootargs "console=dtuart dtuart=@@XEN_SERIAL_CONSOLES@@ dom0_mem=@@DOM0_MEM@@ dom0_max_vcpus=@@DOM0_MAX_VCPUS@@ bootscrub=0 vwfi=native @@XEN_CMDLINE_APPEND@@"
+        fdt set /chosen xen,xen-bootargs \"${xen_bootargs}\"
+
+        # Check that env $ramdisk_size is 0 or not.
+        if test -n ${ramdisk_size}; then
+                fdt mknod /chosen dom0-ramdisk
+                fdt set /chosen/dom0-ramdisk compatible  "xen,linux-initrd" "xen,multiboot-module" "multiboot,module"
+                fdt set /chosen/dom0-ramdisk reg <0x0 @@RAMDISK_IMAGE_ADDRESS@@ 0x0 ${ramdisk_size}>
+                setenv rootfs_param @@KERNEL_ROOT_RAMDISK@@
+        else
+                setenv rootfs_param @@KERNEL_ROOT_SD@@
+        fi
+
+        fdt mknod /chosen dom0
+        fdt set /chosen/dom0 compatible  "xen,linux-zimage" "xen,multiboot-module" "multiboot,module"
+        fdt set /chosen/dom0 reg <0x0 @@KERNEL_LOAD_ADDRESS@@ 0x0 ${kernel_size}>
+        setenv dom0_bootargs "console=hvc0 earlycon=xen earlyprintk=xen clk_ignore_unused ${rootfs_param}"
+        fdt set /chosen xen,dom0-bootargs \"${dom0_bootargs}\"
+
+        setenv fdt_high 0xffffffffffffffff
+
+        @@KERNEL_BOOTCMD@@ @@XEN_LOAD_ADDRESS@@ - @@DEVICETREE_ADDRESS@@
+done