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doc: rmobile: Update README

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Update the README with build instructions for R8A7795/R8A7796 boards.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
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Marek Vasut 2017-10-01 21:09:53 +02:00 committed by Nobuhiro Iwamatsu
parent 55f6847138
commit fd107e32ee
1 changed files with 33 additions and 8 deletions
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doc/README.rmobile
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@ -2,8 +2,8 @@ Summary
=======
This README is about U-Boot support for Renesas's ARM Cortex-A9 based RMOBILE[1]
and R-Car[2]family of SoCs. Renesas's RMOBILE/R-Car SoC family contains an ARM
Cortex-A9.
and Cortex-A9/A53/A57 based R-Car[2] family of SoCs. Renesas's RMOBILE/R-Car SoC
family contains an ARM Cortex-A9/A53/A57.
Currently the following boards are supported:
@ -11,16 +11,21 @@ Currently the following boards are supported:
* Atmark-Techno Armadillo-800-EVA [4]
* Renesas Electronics Lager
* Renesas Electronics Koelsch
* Renesas Electronics Salvator-X M3
* Renesas Electronics Salvator-XS H3 ES2.0+
* Renesas Electronics ULCB M3 / H3 ES2.0+
Toolchain
=========
ARM Cortex-A9 support ARM v7 instruction set (-march=armv7a).
But currently we compile with -march=armv5 to allow more compilers to work.
(For U-Boot code this has no performance impact.)
Because there was no compiler which is supporting armv7a not much before.
Currently, ELDK[5], Linaro[6], CodeSourcey[7] and Emdebian[8] supports -march=armv7a
and you can get.
Either ARMv7 toolchain for 32bit Cortex-A9 systems or ARMv8 (aarch64)
toolchain for 64bit Cortex-A53/A57 systems. Currently we compile the
32bit systems with -march=armv5 to allow more compilers to work. (For
U-Boot code this has no performance impact.)
Currently, ELDK[5], Linaro[6], CodeSourcery[7] and Emdebian[8] supports
ARMv7. Modern distributions also contain ARMv7 and ARMv8 crosstoolchains
in their package feeds.
Build
=====
@ -48,6 +53,26 @@ Build
make koelsch_config
make
* Salvator-X M3
make r8a7796_salvator-x_defconfig
make
* Salvator-XS H3 ES2.0
make r8a7795_salvator-x_defconfig
make
* ULCB M3
make r8a7796_ulcb_defconfig
make
* ULCB H3 ES2.0
make r8a7795_ulcb_defconfig
make
Links
=====