PM9G45: Difference between revisions

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Add instructions to build for direct Linux Kernel boot
Update Buildroot instructions for br2-external-ronetix / linux4microchip-2026.04
 
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  $ make
  $ make


 
==== Build Results ====
= Build Results =
{| class="wikitable"
{| class="wikitable"
|-
|-
Line 50: Line 49:
|-
|-
| style="padding: 5px;"| binaries/at91bootstrap.bin
| style="padding: 5px;"| binaries/at91bootstrap.bin
| style="padding: 5px;"| BIN image, should be programmed at address 0x0  
| style="padding: 5px;"| BIN image, should be programmed at address 0x0
|-
|-
| style="padding: 5px;"| binaries/at91bootstrap.elf
| style="padding: 5px;"| binaries/at91bootstrap.elf
| style="padding: 5px;"| ELF image used for JTAG debugging
| style="padding: 5px;"| ELF image used for JTAG debugging
|-
|}
= Building Buildroot - a simple Linux System for {{#var:HARDWARE_NAME}} =
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation.<br>
The home page of Buildroot is: https://buildroot.org<br>
The Buildroot user manual can help you better understand how Buildroot works: http://www.buildroot.net/downloads/manual/manual.html<br>
The Buildroot for AT91SAM9G45 is maintained by Microchip: https://github.com/linux4microchip/buildroot-mchp<br>
Buildroot can build:
* at91bootstrap
* U-Boot
* Linux kernel
* A cross-compiler
* Root filesystems of different types
====  Prerequisites ====
The host build system should be a Linux system with necessary software installed:
http://www.buildroot.net/downloads/manual/manual.html#requirement<br>
In addition to these required packages, you should also install libssl-dev:
$ sudo apt-get install libssl1.0-dev
or, depending on your host distribution:
$ sudo apt-get install libssl-dev
==== Get sources ====
$ mkdir buildroot-ronetix
$ cd buildroot-ronetix
$ git clone https://github.com/linux4microchip/buildroot-mchp.git
$ git clone https://github.com/ronetix/br2-external-ronetix.git
$ cd buildroot-mchp
$ git switch -c linux4microchip-2026.04 linux4microchip-2026.04
==== Build ====
$ make BR2_EXTERNAL=../br2-external-ronetix pm9g45_defconfig
$ make
==== Build Results ====
Once compilation is done, the images have been generated in: ./output/image:<br>
* at91bootstrap.bin
* rootfs.tar
* u-boot.bin
* zImage
* pm9g45.dtb
* rootfs.ubi
* rootfs.ubifs
==== Customizing Buildroot ====
===== AT91Bootstrap =====
$ make at91bootstrap3-menuconfig
===== U-BOOT =====
$ make uboot-menuconfig
===== Linux Kernel =====
$ make linux-menuconfig
===== RootFs =====
$ make menuconfig
==== NAND Boot: Programming images ====
SAM-BA tool or PEEDI JTAG Flash Programmer can be used for programming the images into the NAND Flash.<br>
{| class="wikitable"
|-
! scope="col" | Address
! scope="col" | Image
! scope="col" | Note
|-
| style="padding: 5px;"| 0x00000000
| style="padding: 5px;"| boot.bin
| style="padding: 5px;"| at91bootstrap
|-
| style="padding: 5px;"| 0x00020000
| style="padding: 5px;"| u-boot.bin
| style="padding: 5px;"| U-BOOT, third level bootloader
|-
| style="padding: 5px;"| 0x00180000
| style="padding: 5px;"| pm9g45.dtb
| style="padding: 5px;"| Device tree for Linux Kernel
|-
| style="padding: 5px;"| 0x00200000
| style="padding: 5px;"| zImage
| style="padding: 5px;"| Linux Kernel
|-
| style="padding: 5px;"| 0x00800000
| style="padding: 5px;"| rootfs.ubi
| style="padding: 5px;"| Root file system
|-
|-
|}
|}

Latest revision as of 15:32, 15 September 2026




PM9G45 is a System-on-module (SoM) board in SODIMM204 format designed for embedded applications.

PM9G45 is using the Microchip (ATMEL) AT91SAM9G45 CPU with an ARM926EJ CPU running at 400MHz

Product Info: https://ronetix.at/product/pm9g45-cpu-module-with-atmel-at91sam9g45

Information about at91bootstrap, U-BOOT, Linux can be found here:
https://www.linux4sam.org/bin/view/Linux4SAM/GettingStarted#Getting_Started_SAM9

Building at91bootstrap - second level bootloader for PM9G45

This bootloader is based on https://github.com/linux4sam/at91bootstrap, branch at91bootstrap-3.x

Install and setup the cross-compiler and CPU architecture

$ cd ~
$ mkdir bin
$ wget http://download.ronetix.at/toolchains/crosstool-ng/arm-ronetix-eabi-11.1.0.tar.gz
$ tar xvfz arm-ronetix-eabi-11.1.0.tar.gz --directory bin
$ export ARCH=arm
$ export CROSS_COMPILE=~/bin/arm-ronetix-eabi-11.1.0/bin/arm-ronetix-eabi-

Clone the latest revision of the repo

$ git clone [email protected]:ronetix/at91bootstrap.git -b at91bootstrap-3.10.4_rnx
$ cd at91bootstrap

Configure and build for booting of U-BOOT

$ make pm9g45_nf_uboot_defconfig
$ make

Configure and build for booting of Linux Kernel

$ make pm9g45_nf_linux_defconfig
$ make

Build Results

File Name Description
binaries/at91bootstrap.bin BIN image, should be programmed at address 0x0
binaries/at91bootstrap.elf ELF image used for JTAG debugging


Building Buildroot - a simple Linux System for PM9G45

Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation.
The home page of Buildroot is: https://buildroot.org
The Buildroot user manual can help you better understand how Buildroot works: http://www.buildroot.net/downloads/manual/manual.html
The Buildroot for AT91SAM9G45 is maintained by Microchip: https://github.com/linux4microchip/buildroot-mchp

Buildroot can build:

  • at91bootstrap
  • U-Boot
  • Linux kernel
  • A cross-compiler
  • Root filesystems of different types

Prerequisites

The host build system should be a Linux system with necessary software installed: http://www.buildroot.net/downloads/manual/manual.html#requirement
In addition to these required packages, you should also install libssl-dev: 

$ sudo apt-get install libssl1.0-dev

or, depending on your host distribution: 

$ sudo apt-get install libssl-dev

Get sources

$ mkdir buildroot-ronetix
$ cd buildroot-ronetix
$ git clone https://github.com/linux4microchip/buildroot-mchp.git
$ git clone https://github.com/ronetix/br2-external-ronetix.git

$ cd buildroot-mchp
$ git switch -c linux4microchip-2026.04 linux4microchip-2026.04

Build

$ make BR2_EXTERNAL=../br2-external-ronetix pm9g45_defconfig
$ make

Build Results

Once compilation is done, the images have been generated in: ./output/image:

  • at91bootstrap.bin
  • rootfs.tar
  • u-boot.bin
  • zImage
  • pm9g45.dtb
  • rootfs.ubi
  • rootfs.ubifs


Customizing Buildroot

AT91Bootstrap
$ make at91bootstrap3-menuconfig
U-BOOT
$ make uboot-menuconfig
Linux Kernel
$ make linux-menuconfig
RootFs
$ make menuconfig

NAND Boot: Programming images

SAM-BA tool or PEEDI JTAG Flash Programmer can be used for programming the images into the NAND Flash.

Address Image Note
0x00000000 boot.bin at91bootstrap
0x00020000 u-boot.bin U-BOOT, third level bootloader
0x00180000 pm9g45.dtb Device tree for Linux Kernel
0x00200000 zImage Linux Kernel
0x00800000 rootfs.ubi Root file system
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