From f44162ed052f6377040ad5cbd3bfc4e164a48b0e Mon Sep 17 00:00:00 2001 From: Francis Rowe Date: Mon, 12 Oct 2015 19:14:44 -0400 Subject: docs/hcl/c201.html: clarify that microcode on x86 is read-only --- diff --git a/docs/hcl/c201.html b/docs/hcl/c201.html index 2f6947c..b3b6c4f 100644 --- a/docs/hcl/c201.html +++ b/docs/hcl/c201.html @@ -163,8 +163,9 @@

Unlike x86 (e.g. Intel/AMD) CPUs, ARM CPUs do not use microcode, not even built in. On the Intel/AMD based libreboot systems, there is still microcode in the CPU - (not considered problematic by the FSF, since it's part of the hardware), but we - exclude microcode updates, which are proprietary software. + (not considered problematic by the FSF, since it's part of the hardware and read-only), but we + exclude microcode updates (volatile updates which are uploaded at boot time by the boot firmware, + if present), which are proprietary software.

On ARM CPUs, the instruction set is implemented in circuitry, without microcode. -- cgit v0.9.1