On 5 April 2015 at 09:23, Ivaylo Dimitrov <ivo.g.dimitrov.75@xxxxxxxxx> wrote: > Though I wonder why SMC is needed to write ACR on non-HS devices. A simple > MRC should suffice, unless I miss something. Public-world access to ACR varies per bit: bit 1 (L2EN) is documented as banked, but at least on r3p2 turns out to be common r/w. bits 30-31 are secure read-only and public RAZ. remaining bits are secure read/write and public read-only. The net effect is that doing an MRC from public world will only modify the L2EN bit. There's no bit in the non-secure access control register to affect all of this, so GP vs HS doesn't matter here (from a CPU point of view; it may matter for the availability of SM calls obviously). Matthijs -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
