Specific SOM U-Boot Environment Variables

Info Box Applies to Naon Applies to Maya Applies to Dido Applies to U-Boot

IntroductionEdit

This page describes the U-Boot environment variables that specifically applies to certain DAVE Embeddded Systems SOMs.

Naon FamilyEdit

The variables listed on the following table applies to Naon, Maya and Dido SOMs.

U-Boot specific variables for Naon-family SOMs

Variable	Values	Description	Notes
eth0 eth1	xx:xx:xx:xx:xx:xx	MAC address for both eth0 and eth1 interfaces	Available with NELK 4.0.0 and above
dual_emac	0 - 1 [0: CPSW switch mode - 1: CPSW dual EMAC mode]	Configures CPSW mode	Available with NELK 4.0.0 and above
cpsw	0 - 1 [0: phy 6 -> 100Mbit Naon module - 1: phy 1 -> 1Gbit external phy]	Selects primary phy for networking operations in U-Boot	Available with NELK 2.0.0 and above External phy available on Naon-EVB-Lite and Naon-EVB-Mid
giga	on [on : gigabit]	Selects gigabit speed on gigabit link	Available with NELK 2.0.0 and above
naon_host	Naon: [evb_mid - evb_lite] Maya: [maya_naon_evb_lite] Dido: [evb_mid - evb_lite]	Selects carrier board pinmux	Available with NELK 2.0.0 and above Please refer to U-Boot source tree for the available pinmux

DidoEdit

The following variables applies to Dido CPU module. Please note that the this variables refers to U-Boot and Linux provided with NELK version 4.0.0.

addmem = 'setenv bootargs ${bootargs} mem 364M mem=320M@0x9fc00000 mem=1020M@0xc0000000 vmalloc=500M' - Dido 2 GB memory