On 05/12/15 01:09, Troy Kisky wrote:

On 5/11/2015 3:24 AM, Palacios, Hector wrote:

...

Hello Troy,

Code comments on commit 124a06d7fbbf82f47304d499418460312a725ad6 for forcing the boot mode say:

+/*

• • cfg_val will be used for
• • Boot_cfg4[7:0]:Boot_cfg3[7:0]:Boot_cfg2[7:0]:Boot_cfg1[7:0]
• • After reset, if GPR10[28] is 1, ROM will copy GPR9[25:0]
• • to SBMR1, which will determine the boot device.
• */

Although this works (the ROM boots from the media configured in GPR9[25:0] if GPR10[28] is set), the value of SBMR1 does not really change, as the comment says, and is still the one read by the strapping.

I didn't find this documented on the HRM. Where did you find it?

Thanks

Héctor Palacios

In source code from a boot shim from freescale.

BTW, we have observed that the description in the comment is not exact and therefore commit: f2863ff (arm: imx: make bmode command work with SPL/U-Boot combo) fixes also the comment.