HiFive_U-Boot

Development repository for HiFive Unleashed U-Boot

This repository contains the U-Boot created by Microsemi a Microchip company for RISC-V core on HiFive Unleashed 540 device. The HiFive Unleashed Board is used for HiFive U-Boot.

RISC-V cross tools

Get the RISC-V cross tool from SiFive GitHub and follow the README file for installation.

    $ git clone --recursive https://github.com/sifive/freedom-u-sdk.git    
    $ cd freedom-u-sdk    
    $ make

Getting U-Boot sources

    $ git clone https://github.com/Microsemi-SoC-IP/HiFive_U-Boot
    $ cd HiFive_U-Boot

Build U-Boot

Set the PATH

 $ export PATH=$PATH:/{path to freedom-u-sdk}/toolchain/bin

Create U-Boot configuration based on architecture defaults:
```
 $ make HiFive-U540_defconfig
```
Optionally edit the configuration via an ncurses interface:
```
 $ make menuconfig
```
Build the U-Boot image:
```
 $ make
```

Load uboot image on SD card

Copy uboot.bin image to freedom-u-sdk/work directory
Connect SD card to a Host machine.

Open make file from freedom-u-sdk directory and edit at .PHONY: format-boot-loader

 .PHONY: format-boot-loader
 format-boot-loader: $(bin)
    @test -b $(DISK) || (echo "$(DISK): is not a block device"; exit 1)
    sgdisk --clear                                                               \
           --new=1:2048:4095   --change-name=1:uboot      --typecode=1:$(FSBL)   \
           --new=2:4096:69631  --change-name=2:bootloader --typecode=2:$(BBL)   \
           --new=3:264192:     --change-name=3:root       --typecode=3:$(LINUX) \
       $(DISK)
 @sleep 1
 ifeq ($(DISK)p1,$(wildcard $(DISK)p1))
    @$(eval PART1 := $(DISK)p1)
    @$(eval PART2 := $(DISK)p2)
    @$(eval PART3 := $(DISK)p3)
 else ifeq ($(DISK)s1,$(wildcard $(DISK)s1))
    @$(eval PART1 := $(DISK)s1)
    @$(eval PART2 := $(DISK)s2)
    @$(eval PART3 := $(DISK)s3)
 else ifeq ($(DISK)1,$(wildcard $(DISK)1))
    @$(eval PART1 := $(DISK)1)
    @$(eval PART2 := $(DISK)2)
    @$(eval PART3 := $(DISK)3)
 else
    @echo Error: Could not find bootloader partition for $(DISK)
@exit 1

endif

dd if=/{Path_To}/freedom-u-sdk/work/u-boot.bin of=$(PART1) bs=4096

dd if=/{Path_To}/freedom-u-sdk/work/bbl.bin of=$(PART2) bs=4096

mke2fs -t ext3 $(PART3)

Go to freedom-u-sdk directory

 $ cd freedom-u-sdk
 $ sudo make DISK=/dev/sdb format-boot-loader

If any error, follow the HiFive Getting started user guide section 7.2.4.

Remove SD card from Host machine and insert it on the HiFive unleashed Board
Select dip switch for mode select to 1011(boot from SD card)
Power suppy the board and connect usb cable to Host Machine and open serial terminal with 115200 baud rate.
Press reset button and see the uboot messages on serial terminal

Boot Linux from SD card

Enter below commands on serial terminal

    # mmc_spi 1 20000000 0
    # mmc read 0x80000000 0x1000 0x10000
    # go 0x80000000

Boot Linux from TFTP