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BELK-AN-001: Asymmetric Multiprocessing (AMP) on Bora – Linux FreeRTOS

5,868 bytes added, 14:01, 15 September 2015

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==Appendixes==

===U-Boot environment===

The following is the U-Boot environment that can be printed using the print command (please note these are examples and that the actual variables may differ for different U-Boot settings), for both the FreeRTOS applications described in this application note.

====Example #1: HelloWorld application====

<pre>

addcons=setenv bootargs ${bootargs} console=${console},115200n8 cma=16M debug maxcpus=${nr_cpus}

addip=setenv bootargs ${bootargs} ip=${ipaddr}:${serverip}:${gateway}:${netmask}:${hostname}:${ethdev}

addmem=setenv bootargs ${bootargs} mem=1008M

baudrate=115200

bootdelay=3

bootfile=bora/uImage

console=ttyPS0

dt_base=0x005C0000

ethact=Gem.e000b000

ethaddr=00:0a:35:00:01:22

ethdev=eth0

fdt_high=0x1F000000

fileaddr=0

filesize=2f0ed0

fpga_base=0x00180000

fpga_file=belk/free_rtos/bora_design_wrapper.bin

freertos_addr=0x3F000000

freertos_file=bora/belk/free_rtos/helloworld_freertos.bin

fsbl_base=0x40000

ftd_file=bora/bora.dtb

gateway=192.168.0.254

header_base=0

hostname=bora

ipaddr=192.168.0.209

jtagboot=echo TFTPing Linux to RAM...;tftp 0x8000 zImage;tftp 0x1000000 devicetree.dtb;tftp 0x800000 ramdisk8M.image.gz;go 0x8000

kernel_size=0x140000

load=tftp ${loadaddr} bora/u-boot.bin

load_dt=tftp ${loadaddr} bora/bora.dtb

load_fpga=tftp ${loadaddr} bora/${fpga_file}

load_freertos=tftp ${freertos_addr} ${freertos_file};mw.l 0xFFFFFFF0 ${freertos_addr}

load_fsbl=tftp ${loadaddr} bora/belk/free_rtos/bora_FSBL.bin

load_h=tftp ${loadaddr} bora/boot_header-1.1.0

loadaddr=0x08000000

loadaddr_ftd=0x01000000

loadaddr_kern=0x0

loadk=tftp ${loadaddr_kern} ${bootfile};tftp ${loadaddr_ftd} ${ftd_file}

modeboot=qspiboot

net_nfs=run program_fpga; run load_freertos; run loadk nfsargs addip addcons addmem; bootm ${loadaddr_kern} - ${loadaddr_ftd}

netmask=255.255.255.0

nfsargs=setenv bootargs root=/dev/nfs rw nfsroot=${serverip}:${rootpath}

nr_cpus=1

program_fpga=run load_fpga;fpga load 0 ${loadaddr} 0x${filesize}

qspiboot=sf probe 0 0 0;sf read 0x8000 0x100000 0x2c0000;sf read 0x1000000 0x3c0000 0x40000;sf read 0x800000 0x400000 0x800000;go 0x8000

ramdisk_size=0x200000

rootpath=/home/shared/devel/dave/bora-DBRx/sw/linux/rfs/BELK/ubuntu_12.04

sdboot=echo Copying Linux from SD to RAM...;mmcinfo;fatload mmc 0 0x8000 zImage;fatload mmc 0 0x1000000 devicetree.dtb;fatload mmc 0 0x800000 ramdisk8M.image.gz;go 0x8000

serverip=192.168.0.23

stderr=serial

stdin=serial

stdout=serial

u-boot_base=0x80000

update=sf probe 0 0 0;sf erase ${u-boot_base} 0x80000;sf write ${loadaddr} ${u-boot_base} 0x80000

update_dt=sf probe 0 0 0;sf erase ${dt_base} 0x40000;sf write ${loadaddr} ${dt_base} 0x40000

update_fpga=sf probe 0 0 0;sf erase ${fpga_base} 0x440000;sf write ${loadaddr} ${fpga_base} 0x440000

update_fsbl=sf probe 0 0 0;sf erase ${fsbl_base} 0x40000;sf write ${loadaddr} ${fsbl_base} 0x40000

update_fsbl_nand=run load_fsbl; nand erase 0x40000 0x40000; nand write ${loadaddr} 0x40000 0x40000

update_h=sf probe 0 0 0;sf erase ${header_base} 0x40000;sf write ${loadaddr} ${header_base} 0x40000

</pre>

====Example #2: RPMsg-based application====