Re: [PATCH v4 13/20] spl: imx: use trampoline buffer to load images to secure region

On 1/15/25 2:29 PM, Alice Guo wrote:

From: Ye Li ye.li@nxp.com

When SPL loading image to secure region, for example, ATF and tee to DDR secure region. Because the USDHC controller is non-secure master, it can't access this region and will cause loading issue.

So use a trampoline buffer in non-secure region, then use CPU to copy the image from trampoline buffer to destination secure region.

There is already common/bouncebuf.c , can you instead implement something similar, which would behave as a generic bounce buffer, except for the secure/nonsecure regions ?

The region configuration could come from DT or maybe from firmware ?