Remove demap code for MMU miss faults.

This code was #if 0, except for instruction misses where it had been enabled
probably by mistake... and was demapping in the data mmu anyway...
(#include <facepalm.h>)

ok kettenis@

diff --git a/sys/arch/sparc64/sparc64/locore.s b/sys/arch/sparc64/sparc64/locore.s
index b0e3daf..0ad7061 100644 (file)
--- a/sys/arch/sparc64/sparc64/locore.s
+++ b/sys/arch/sparc64/sparc64/locore.s
@@ -1,4 +1,4 @@
-/*     $OpenBSD: locore.s,v 1.218 2024/04/08 20:05:51 miod Exp $       */
+/*     $OpenBSD: locore.s,v 1.219 2024/04/08 20:07:07 miod Exp $       */
 /*     $NetBSD: locore.s,v 1.137 2001/08/13 06:10:10 jdolecek Exp $    */
 
 /*
@@ -1425,17 +1425,6 @@ data_miss:
        stx     %g4, [%g2 + 8]                          ! Update TSB entry data
        stx     %g1, [%g2]                              ! Update TSB entry tag
 
-#if 0
-       /* This was a miss -- should be nothing to demap. */
-       sllx    %g3, (64-13), %g6                       ! Need to demap old entry first
-       mov     DEMAP_PAGE_SECONDARY, %g1               ! Secondary flush
-       mov     DEMAP_PAGE_NUCLEUS, %g5                 ! Nucleus flush
-       movrz   %g6, %g5, %g1                           ! Pick one
-       andn    %g3, 0xfff, %g6
-       or      %g6, %g1, %g6
-       stxa    %g6, [%g6] ASI_DMMU_DEMAP               ! Do the demap
-       membar  #Sync                                   ! No real reason for this XXXX
-#endif /* 0 */
        stxa    %g4, [%g0] ASI_DMMU_DATA_IN             ! Enter new mapping
        membar  #Sync
        CLRTT
@@ -1947,17 +1936,6 @@ instr_miss:
        LOCK_TSB
        stx     %g4, [%g2 + 8]                          ! Update TSB entry data
        stx     %g1, [%g2]                              ! Update TSB entry tag
-#if 1
-       /* This was a miss -- should be nothing to demap. */
-       sllx    %g3, (64-13), %g6                       ! Need to demap old entry first
-       mov     DEMAP_PAGE_SECONDARY, %g1               ! Secondary flush
-       mov     DEMAP_PAGE_NUCLEUS, %g5                 ! Nucleus flush
-       movrz   %g6, %g5, %g1                           ! Pick one
-       andn    %g3, 0xfff, %g6
-       or      %g6, %g1, %g6
-       stxa    %g6, [%g6] ASI_DMMU_DEMAP               ! Do the demap
-       membar  #Sync                                   ! No real reason for this XXXX
-#endif /* 1 */
        stxa    %g4, [%g0] ASI_IMMU_DATA_IN             ! Enter new mapping
        membar  #Sync
        CLRTT