6. SiFive HiFive Unleashed Hardware Deployment¶
6.1. Building Keystone¶
Building for the HiFive is straight-forward. First, clone the Keystone repository in the manager instance.
git clone https://github.com/keystone-enclave/keystone
Follow Setup to setup the repository.
After you setup the repository, you can run the following commands to build Keystone.
mkdir <build directory> cd <build directory> cmake .. -DLINUX_SIFIVE=y make make image
CMake with the flag
-DLINUX_SIFIVE=y will automatically generate Makefiles to build
SiFive-compatible Linux and SM.
This includes some patches for DTB compatibility.
Also, the build will forcibly use initramfs for a simpler deployment.
Once you have built the image, you will see
sm.build/platform/generic/firmware/ under your
make image will also generate
sm.build/platform/generic/firmware/fw_payload.bin under your build directory.
This is the file that you want to reflash the SD card with.
You can also boot QEMU machine with the image using
6.2. Setting up the HiFive¶
6.2.1. Setup Bootloader¶
First, you will need to get a working custom first-stage bootloader (FSBL) working on your board. This will require creating a new partition on your SD card as well as setting the MSEL2 dipswitch. See https://github.com/sifive/freedom-u540-c000-bootloader/issues/9#issuecomment-424162283 for details.
For the bootloader itself, you’ll need to build our copy of the bootloader: https://github.com/keystone-enclave/freedom-u540-c000-bootloader .
Make sure to flash this to the right partition type (see github thread or example script below).
6.2.2. Load Linux Image¶
The hifive build process generates a bbl.bin in
<build directory>/sm.build/platform/generic/firmware/fw_payload.bin`. Flash this to the Linux partition on the
card. (Note that this is a relocated version of the bbl binary used
6.2.3. Example loading script¶
This is an example of a script to load the FSBL and BBL into a card for use on the HiFive. Be careful as this will repartition the target disk!
You only need to reprogram the FSBL when modifying the first-stage bootloader itself. (Likely never)
#!/bin/bash set -e # Relevant partition type codes BBL=2E54B353-1271-4842-806F-E436D6AF6985 LINUX=0FC63DAF-8483-4772-8E79-3D69D8477DE4 FSBL=5B193300-FC78-40CD-8002-E86C45580B47 MKE2FS=mke2fs DISK=$1 echo "Operating on $DISK" test -b $DISK echo "$DISK exists, paritioning..." # Configure the partitions on the disk. # NOTE: The block ranges given here are for the 8GB card we are using # You may wish to use different partition sizes. sgdisk --clear \ --new=1:2048:67583 --change-name=1:bootloader --typecode=1:$BBL \ --new=2:264192: --change-name=2:root --typecode=2:$LINUX \ --new=3:67584:69631 --change-name=3:siv-fsbl --typecode=3:$FSBL \ $DISK sleep 1 PART_BBL=$DISK"1" PART_LINUX=$DISK"2" PART_FSBL=$DISK"4" echo "COPYING BBL to $PART_BBL" test -b $PART_BBL dd if=bbl.bin of=$PART_BBL bs=4096 echo "Copy done" echo "COPYING FSBL to $PART_FSBL" test -b $PART_FSBL $MKE2FS -t ext3 $PART_FSBL dd if=fsbl.bin of=$PART_FSBL bs=1024 echo "Copy done"
6.3. Running on the HiFive¶
The needed driver, bins, etc are included in the buildroot image. You can always use buildroot overlay to add more files to the base image.
Generally, we also suggest
scp ing the files to the board after boot.
6.3.1. Setup network¶
Attach to the serial console on the HiFive board.
Boot the HiFive with the custom FSBL/Linux as described above.
Once booted, setup the network such that you can connect to it from your development machine. (Either a local network or a simple unmanaged switch is suggested)
6.3.2. Run binaries¶
Insert the Keystone driver, and run whatever test binaries you wish.
insmod keystone-driver.ko ./tests/tests.ke