[Libre-soc-bugs] [Bug 859] Implement SPR_KAIVB

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=859

--- Comment #6 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
all good, unit test created and passes

https://git.libre-soc.org/?p=soc.git;a=commitdiff;h=10f4200e58562d6070203afdddea1dc0c0eb5f88
https://git.libre-soc.org/?p=openpower-isa.git;a=commitdiff;h=58a7e851cc2b288fe99a125f6d929e3402328e06

-        # trap address
+        # trap address, including KAIVB override
         comb += nia_o.data.eq(trap_addr)
+        comb += nia_o.data[13:].eq(self.kaivb[13:])

sc *also* is redirected as well because it uses the exact same TRAP
system

            #################
            # SC.  v3.0B p952

            with m.Case(MicrOp.OP_SC):
                # jump to the trap address, return at cia+4
                self.trap(m, 0xc00, cia_i+4)
                self.msr_exception(m, 0xc00)

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