[Libre-soc-bugs] [Bug 427] New: LDST cache-inhibit instructions needed (l*cix, st*cix)

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Sun Jul 12 12:38:49 BST 2020


https://bugs.libre-soc.org/show_bug.cgi?id=427

            Bug ID: 427
           Summary: LDST cache-inhibit instructions needed (l*cix,
                    st*cix)
           Product: Libre-SOC's first SoC
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: CONFIRMED
          Severity: enhancement
          Priority: ---
         Component: Source Code
          Assignee: lkcl at lkcl.net
          Reporter: lkcl at lkcl.net
                CC: libre-soc-bugs at lists.libre-soc.org
   NLnet milestone: ---

cache-inhibit variants of LDST instructions are needed.

* lbzcix RT,RA,RB
* lhzcix RT,RA,RB
* lwzcix RT,RA,RB
* ldcix RT,RA,RB
* stbcix RS,RA,RB
* sthcix RS,RA,RB
* stwcix RS,RA,RB
* stdcix RS,RA,RB

these to have a flag indicating cache-bypass

pseudo-code to be added to wiki isa

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