1 / 10

AT91SAM Linux Introduction

AT91SAM Linux Introduction. What do you need to setup a complete Linux system?. Morning Agenda. Environment Setup. Hands-on 01. U-Boot Introduction. Use TFTP on U-Boot. Hands-on 03. NFS Use. Hands-on 04. Kernel Building. Hands-on 05. AT91 Linux Introduction. Linux Getting Started.

jocelyn-mays
Download Presentation

AT91SAM Linux Introduction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. AT91SAM Linux Introduction What do you need to setup a complete Linux system?

  2. Morning Agenda Environment Setup Hands-on 01 U-Boot Introduction Use TFTP on U-Boot Hands-on 03 NFS Use Hands-on 04 Kernel Building Hands-on 05 AT91 Linux Introduction Linux Getting Started Hands-on 02

  3. Outlines Embedded Linux overview AT91 Linux components and functions AT91 Linux boot sequence AT91 Linux ecosystem Summary

  4. Embedded Linux Overview HOST OS(Ubuntu 11.04) Cross-platform Development Environment TARGET Bootloader Kernel Root File System Serial Cable Ethernet Cable USB Cable • Host • OS (Linux/Windows) • For develop tools • Virtual Machine (Linux) • For develop tools • Tools • SAM-BA, Serial port terminal • Cross-platform development environment • Different CPU architecture Linked Connection • For deploy and debug • Target • Bootloader • Initialization of the board • Load kernel • Kernel • Drivers • Root File System • CUI/GUI • Applications packages

  5. Linux Components & Functions A Linux system requires several components: • Bootloader(s) • Configure the memory system. • Load the kernel image at the correct memory address. • Optionally load an initial RAM disk at the correct memory address. • Initialize boot parameters for the Linux kernel. • Obtain the ARM Linux machine type. • Linux kernel image • Usually a compressed image is used (zImage) • Some bootloaders (Ex: U-Boot) do not support normal kernel image and have to convert it to another format: uImage • Root file system • The kernel needs a root file system to mount at startup.It contains init program, applications, libraries, data….

  6. AT91SAM Linux components and functions AT91 ROM code (embedded in the board) • Provide USB connection for SAM-BA • Determine where to boot the system AT91 Bootstrap • Configure the memory system. • Low level hardware initialization • Load U-Boot image to RAM and run it. U-Boot • Initialize network connection and flash read/write functions. • Load the kernel image at the correct memory address. • Initialize boot parameters for the Linux kernel. Kernel • OS Root FS • Applications • Libraries • UI

  7. AT91 Linux boot sequence – NAND flash InternalMemories NAND flash offset: Root FS 0x00400000 Linux Kernel Linux Kernel 0x00200000 SAMBA Boot U-Boot U-Boot 0x00020000 NandFlash-Boot NVM Boot NandFlash-Boot AT91Bootstrap AT91Bootstrap 0x00000000 ROM NAND FLASH Physical Addr: Linux Kernel 0x72200000 AT91Bootstrap U-Boot 0x73F00000 0x00300000 DDRAM 9X5 addr is 0x2xxxxxxx SRAM Current running Application in Red

  8. Linux4SAM – http://www.linux4sam.org Centralize information about Linux Kernel and open source project on AT91 products Experimental patches (not yet submitted) AT91 Linux Demo including bootstrap, u-boot, Linux kernel and root file system

  9. Ecosystem Diagram A Linux system requires several components: AT91Linux -> ARM Linux -> Mainline Linux http://www.kernel.org is the goal http://www.linux4sam.org http://www.at91.com/android4sam.org

  10. More information AT91SAM OS Ecosystem: • AT91SAM Linux Ecosystem http://linux4sam.org • AT91SAM WinCE Ecosystem http://www.at91.com/windows4sam • AT91SAM Android Ecosystem http://www.at91.com/android4sam • AT91SAM community forum: http://www.at91.com

More Related