[系统相关] 【Arrow SoC】从QSPI Flash 启动

chenzhufly 2014-12-19 10:18 楼主

Introduction This solution documents the steps required to prepare an Arrow SoCKit evaluation board to boot from QSPI. There are a few broad steps that are required.

Prepare the boot files
Write the boot files to the QSPI serial flash.
Configure the board to boot from QSPI.

This Solution assumes you have a suitable Linux host available to develop the boot files for the SoCKit target. It is also important to note that this solution requires that you have the 3.9 release of the linux kernel and the 2013.01.01 release of u-boot.Prepare the Boot files 1. The preloader (u-boot-spl) Creating a preloader is shown in detail in the Arrow SoC Workshop Software Lab Instructions Guide. You can download these materials at http://www.arrownac.com/solutions/sockit/ under the Getting Started Tab.

Please refer to Module 3 for exact steps on how to create a preloader. The preloader can be modified to boot from QSPI.

To modify the preloader for QSPI do the following:

Open the bsp-editor and select the settings.bsp file of the existing preloader.
Check the checkbox next to BOOT_FROM_QSPI. Uncheck the checkbox next to BOOT_FROM_SDMMC
Press the Generate button. Press exit.
Use make to build the executable as shown in the Workshop Software Lab Instructions Guide Module 3.
Navigate to the /software/spl_bsp/uboot_socfpga/spl directory
Create the bootable preloader. At the prompt type 'mkpimage -o preloader_with_header_qspi.img u-boot-spl.bin'
Copy preloader_with_header_qspi.img to a folder where you will gather all the bootable files.

2. Clone the Yocto Project git Tree The instructions for cloning the Yocto Project git trees and building Yocto Project are:

git clone http://git.rocketboards.org/poky-socfpga.git
cd poky-socfpga/
git checkout -b origin/danny-altera
source ./altera-init build
bitbake u-boot altera-image-minimal
copy altera-image-minimal-socfpga_cyclone5-.rootfs.jffs2 from poky-socfpga/build/tmp/deploy/images to a folder where you will gather all the bootable files
copy socfpga_cyclone5-.dtb from poky-socfpga/build/tmp/deploy/images to a folder where you will gather all the bootable files
rename the files to remove the build date.

3. Modify u-boot to support Qspi This section presents instructions on how to recompile u-boot. It assumes that you have manually downloaded the build toolchain.

open new shell. cd poky-socfpga/build/tmp/work/armv7ahf-vfp-neon-poky-linux-gnueabi/u-boot-altera-2013.01.01-r0/git
export CROSS_COMPILE=~/gcc-linaro-arm-linux-gnueabihf-4.7-2012.11-20121123_linux/bin/arm-linux-gnueabihf-
modify poky-socfpga/build/tmp/work/armv7ahf-vfp-neon-poky-linux-gnueabi/u-boot-altera-2013.01.01-r0/git/board/altera/socfpga/build.h. as shown in the two bullets below
#define CONFIG_PRELOADER_BOOT_FROM_QSPI (1)
#define CONFIG_PRELOADER_BOOT_FROM_SDMMC (0)
modify poky-socfpga/build2/tmp/work/armv7ahf-vfp-neon-poky-linux-gnueabi/u-boot-altera-2013.01.01-r0/git/include/configs/socfpga_common.h as shown in the three bullets below
change #define CONFIG_BOOTCOMMAND "run mmcload; run mmcboot" to #define CONFIG_BOOTCOMMAND "run qspiload; run qspiboot"
change #define CONFIG_BAUDRATE 115200 to #define CONFIG_BAUDRATE 57600
rebuild u-boot; make clean; make all
copy u-boot.img from poky-socfpga/build/tmp/work/armv7ahf-vfp-neon-poky-linux-gnueabi/u-boot-altera-2013.01.01-r0/git to a folder where you will gather all the bootable files

4. Build the Linux kernel

This section presents instructions on how to clone the Linux kernel git tree and compile the Linux kernel. It assumes that you have manually downloaded the build toolchain.

Booting from Qspi is supported by the linux kernel 3.9 and later. Since the Yocto distribution of the kernel is 3.8 please do the following.

git clone http://git.rocketboards.org/linux-socfpga.git
cd linux-socfpga
git checkout -b socfpga-3.9
export CROSS_COMPILE=~/gcc-linaro-arm-linux-gnueabihf-4.7-2012.11-20121123_linux/bin/arm-linux-gnueabihf-
make ARCH=arm socfpga_defconfig
make ARCH=arm zImage LOADADDR=0x8000
copy zImage from linux-socfpga/arch/arm/boot to a folder where you will gather all the bootable files

Write the Boot files to the QSPI serial flash

The Qspi requires the following arrangement in order to boot.

There are two ways to achieve this. The first uses the u-boot sf utility. The second uses the linux mtd_debug utility

1. u-boot sf utility

obtain an SD card with a sockit_20130421.img (u-boot version 2012.10, linux version 3.7) bootable image
copy the five files that you have gathered on your host to the fat32 partition of the SD card (partition 1)
boot the SoCKit using the SD card. hit any key to stop autoboot of u-boot
type 'fatls mmc 0:1' at the prompt to view all the files on the fat32 partition of the SD card
sf probe to intialise the QSPI controller
fatload mmc 0:1 0x2000000 preloader_with_header.img
sf erase 0x0000 0x10000
sf write 0x2000000 0x0000 0x10000
fatload mmc 0:1 0x2000000 u-boot.img
sf erase 0x60000 0x40000
sf write 0x2000000 0x60000 0x40000
fatload mmc 0:1 0x2000000 socfpga_cyclone5.dtb
sf erase 0x50000 0x10000
sf write 0x2000000 0x50000 0x10000
fatload mmc 0:1 0x2000000 zImage
sf erase 0xa0000 0x400000
sf write 0x2000000 0xa0000 0x400000
fatload mmc 0:1 0x2000000 altera-image-minimal-socfpga_cyclone5.rootfs.jffs2
sf erase 0x800000 0xe00000
sf write 0x2000000 0x800000 0xe00000