Difference between revisions of "R-Car/Boards/U-Boot-Gen3"

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  git checkout -b my_working_branch v2018.01-rc1
 
  git checkout -b my_working_branch v2018.01-rc1
  
U-Boot [http://git.denx.de/?p=u-boot.git;a=summary | git hosting] also provides snapshots.
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U-Boot [http://git.denx.de/?p=u-boot.git;a=summary git hosting] also provides snapshots.
  
 
== Prepare build environment ==
 
== Prepare build environment ==
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  patch -Np1 -i 0001-Makefile-add-u-boot-elf.srec-if-CONFIG_REMAKE_ELF-is.patch
 
  patch -Np1 -i 0001-Makefile-add-u-boot-elf.srec-if-CONFIG_REMAKE_ELF-is.patch
  
Then the U-Boot sources must be configured for a particular supported platform. List of platforms and matching defconfigs is available at [[R-Car/Boards/U-Boot-Gen3#Supported_boards|supported boards]].
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The U-Boot sources must be configured for a particular supported platform. List of platforms and matching U-Boot defconfigs is available at [[R-Car/Boards/U-Boot-Gen3#Supported_boards|supported boards]].
 +
 
 +
make r8a779x_y_defconfig
 +
 
 +
for example to configure U-Boot sources for R8A7795 H3 ULCB board:
 +
 
 +
r8a7795_ulcb_defconfig
 +
 
 +
Once configured, U-Boot sources can be compiled to produce u-boot.bin and optionally u-boot-elf.srec:
 +
 
 +
make
 +
 
 +
To speed up build process, -jN option can be passed to make to start multiple jobs at the same time, this is beneficial especially on SMP systems. The following example starts up to (number of CPUs in a system + 1) jobs, which is the recommended amount:
 +
 
 +
make -j`expr \`nproc\` + 1`

Revision as of 08:31, 7 December 2017

Introduction

This is the Wiki for the U-Boot on Renesas R-Car Gen3 SoCs and boards . Refer to the R-Car page for information about Renesas' R-Car SoC family.

Supported boards

As of U-Boot 2018.01-rc1, the following boards are supported:

Supported boards in U-Boot 2018.01-rc1
Board U-Boot defconfig Update procedure
R8A7795 H3 ULCB r8a7795_ulcb_defconfig Flashing firmware
R8A7796 M3 ULCB r8a7796_ulcb_defconfig Flashing firmware
R8A7795 H3 Salvator-X ES2.0+ r8a7795_salvator-x_defconfig N/A
R8A7796 M3 Salvator-X r8a7796_salvator-x_defconfig N/A

Prerequisites

  • RCar R8A7795 H3 ES1.x is NOT supported!
  • Running mainline U-Boot is only supported with IPL/ATF/BL revision 2.23 and newer.
  • ARM cross-compiler is mandatory to build U-Boot (OpenEmbedded generates this for you).

ARM cross-compiler

If you intend to build both IPL/ATF/BL and U-Boot using OpenEmbedded with meta-renesas layer, you can skip this step.

Debian and Ubuntu includes an ARM cross-compiler in its standard package feed. You can install it as follows:

apt-get install gcc-aarch64-linux-gnu

Other distributions likely also provide ARM cross-compilers. Consult distro-specific documentation for details.

Obtain U-Boot sources

The preferred method of obtaining U-Boot sources is through git VCS, using git protocol:

git clone git://git.denx.de/u-boot.git

or via HTTP:

git clone http://git.denx.de/u-boot.git

Finally, check out the version of U-Boot that will be used for the build:

cd u-boot
git checkout -b my_working_branch v2018.01-rc1

U-Boot git hosting also provides snapshots.

Prepare build environment

Before building U-Boot for RCar Gen3 system, the following environment variables need to be configured:

export ARCH=arm64
export CROSS_COMPILE=aarch64-linux-gnu-

The later variable must match the prefix of the Aarch64 cross-toolchain installed on your system, the example above is valid for Debian and Ubuntu,

Build U-Boot

To produce u-boot-elf.srec file during U-Boot build, a patch [1] must first be applied:

git am 0001-Makefile-add-u-boot-elf.srec-if-CONFIG_REMAKE_ELF-is.patch

or in case U-Boot snapshot was used:

patch -Np1 -i 0001-Makefile-add-u-boot-elf.srec-if-CONFIG_REMAKE_ELF-is.patch

The U-Boot sources must be configured for a particular supported platform. List of platforms and matching U-Boot defconfigs is available at supported boards.

make r8a779x_y_defconfig

for example to configure U-Boot sources for R8A7795 H3 ULCB board:

r8a7795_ulcb_defconfig

Once configured, U-Boot sources can be compiled to produce u-boot.bin and optionally u-boot-elf.srec:

make

To speed up build process, -jN option can be passed to make to start multiple jobs at the same time, this is beneficial especially on SMP systems. The following example starts up to (number of CPUs in a system + 1) jobs, which is the recommended amount:

make -j`expr \`nproc\` + 1`