Author: Francis Rowe <firstname.lastname@example.org>
Date: Tue, 13 Oct 2015 00:14:44 +0100
docs/hcl/c201.html: clarify that microcode on x86 is read-only
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git 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.