Date: Sat, 2 Mar 2019 20:59:18 +0000 (UTC) From: Justin Hibbits <jhibbits@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r344729 - head/sys/powerpc/booke Message-ID: <201903022059.x22KxIDJ017837@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: jhibbits Date: Sat Mar 2 20:59:18 2019 New Revision: 344729 URL: https://svnweb.freebsd.org/changeset/base/344729 Log: powerpc/booke: Depessimize MAS register updates even more Remove isyncs between MAS register updates in the TLB miss handler, since it's only needed before the TLB update instructions. Modified: head/sys/powerpc/booke/locore.S head/sys/powerpc/booke/trap_subr.S Modified: head/sys/powerpc/booke/locore.S ============================================================================== --- head/sys/powerpc/booke/locore.S Sat Mar 2 20:58:51 2019 (r344728) +++ head/sys/powerpc/booke/locore.S Sat Mar 2 20:59:18 2019 (r344729) @@ -252,6 +252,7 @@ __start: isync bl zero_mas7 bl zero_mas8 + isync tlbwe isync msync @@ -505,6 +506,7 @@ bp_kernload: isync bl zero_mas7 bl zero_mas8 + isync tlbwe isync msync @@ -695,6 +697,7 @@ tlb1_temp_mapping_as1: bl zero_mas7 bl zero_mas8 mtlr %r3 + isync tlbwe isync msync @@ -742,7 +745,6 @@ zero_mas7: li %r20, 0 mtspr SPR_MAS7, %r20 - isync 1: blr @@ -759,7 +761,6 @@ zero_mas8: 1: li %r20, 0 mtspr SPR_MAS8, %r20 - isync blr #endif Modified: head/sys/powerpc/booke/trap_subr.S ============================================================================== --- head/sys/powerpc/booke/trap_subr.S Sat Mar 2 20:58:51 2019 (r344728) +++ head/sys/powerpc/booke/trap_subr.S Sat Mar 2 20:59:18 2019 (r344729) @@ -761,17 +761,14 @@ search_failed: /* Load MAS registers. */ mtspr SPR_MAS0, %r29 - isync mtspr SPR_MAS1, %r28 - isync mtspr SPR_MAS2, %r27 - isync mtspr SPR_MAS3, %r23 - isync bl zero_mas7 bl zero_mas8 + isync tlbwe msync isync @@ -906,20 +903,16 @@ tlb_fill_entry: /* Load MAS registers. */ mtspr SPR_MAS0, %r29 - isync mtspr SPR_MAS1, %r28 - isync mtspr SPR_MAS2, %r27 - isync mtspr SPR_MAS3, %r22 - isync mtspr SPR_MAS7, %r23 - isync mflr %r21 bl zero_mas8 mtlr %r21 + isync tlbwe isync msync
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201903022059.x22KxIDJ017837>