On 11/16/2015 09:11 AM, Joakim Tjernlund wrote: > On Mon, 2015-11-16 at 08:34 -0800, York Sun wrote: >> Secure memory is at the end of memory, separated and reserved >> from OS, tracked by gd->secure_ram. Secure memory can host >> MMU tables, security monitor, etc. > > Don't see the difference with pram here? > Also, do you really wan't to hide the memory from Linux or will > a resv map do? You get a lot of small TLB maps if memory is non power of 2 >
Jocke, It is different from pram. First, it is at the end of memory, not the top of u-boot memory. The difference is where u-boot runs in memory. Second, the size is much bigger, even this patch doesn't limit the size. In my system, I reserve 2MB memory. Since we already have CONFIG_SYS_MEM_TOP_HIDE, I think it is a good way to reserve big chunk of memory without fragmentation. In my system, the end of usable memory is aligned with 512MB. York _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
