[src/trunk]: src/sys/arch/mips/mips Make sure KX/UX stay on in 64-bit kernels...

[matt <matt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/16ad487fd1d3
branches:  trunk
changeset: 338714:16ad487fd1d3
user:      matt <matt%NetBSD.org@localhost>
date:      Fri Jun 05 16:16:18 2015 +0000

description:
Make sure KX/UX stay on in 64-bit kernels so deferencing the lwp to get
the cpu_info doesn't cause a fault.

diffstat:

 sys/arch/mips/mips/spl.S |  19 +++++++++++++++++--
 1 files changed, 17 insertions(+), 2 deletions(-)

diffs (57 lines):

diff -r 66c27521a3e4 -r 16ad487fd1d3 sys/arch/mips/mips/spl.S
--- a/sys/arch/mips/mips/spl.S  Fri Jun 05 16:01:55 2015 +0000
+++ b/sys/arch/mips/mips/spl.S  Fri Jun 05 16:16:18 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: spl.S,v 1.5 2011/04/06 05:48:35 matt Exp $     */
+/*     $NetBSD: spl.S,v 1.6 2015/06/05 16:16:18 matt Exp $     */
 
 /*-
  * Copyright (c) 2009, 2010 The NetBSD Foundation, Inc.
@@ -38,7 +38,7 @@
 #include <mips/asm.h>
 #include <mips/cpuregs.h>
 
-RCSID("$NetBSD: spl.S,v 1.5 2011/04/06 05:48:35 matt Exp $")
+RCSID("$NetBSD: spl.S,v 1.6 2015/06/05 16:16:18 matt Exp $")
 
 #include "assym.h"
 
@@ -86,7 +86,12 @@
        or      v1, MIPS_INT_MASK               # enable all interrupts
        xor     a0, v1                          # disable ipl's masked bits
        DYNAMIC_STATUS_MASK(a0,v0)              # machine dependent masking
+#ifdef _LP64
+       li      v1, MIPS3_SR_KX | MIPS3_SR_UX   # keep 64-bit addressing on
+       mtc0    v1, MIPS_COP_0_STATUS           ## disable interrupts
+#else
        mtc0    zero, MIPS_COP_0_STATUS         ## disable interrupts
+#endif
        COP0_SYNC
 #ifdef MULTIPROCESSOR
        PTR_L   a3, L_CPU(MIPS_CURLWP)          ## make sure curcpu is correct
@@ -138,7 +143,12 @@
        or      v1, MIPS_INT_MASK               # set all INT bits
        xor     v1, a1                          # clear any bits for this IPL
        DYNAMIC_STATUS_MASK(v1,t0)              # machine dependent masking
+#ifdef _LP64
+       li      v1, MIPS3_SR_KX | MIPS3_SR_UX   # keep 64-bit addressing on
+       mtc0    v1, MIPS_COP_0_STATUS           ## disable interrupts
+#else
        mtc0    zero, MIPS_COP_0_STATUS         ## disable interrupts
+#endif
        COP0_SYNC
        INT_S   a0, CPU_INFO_CPL(a3)            ## save IPL in cpu_info (KSEG0)
        mtc0    v1, MIPS_COP_0_STATUS           ## store back
@@ -173,7 +183,12 @@
        NOP_L                                   # load delay
        or      v0, a0, v1
        DYNAMIC_STATUS_MASK(v0,t0)              # machine dependent masking
+#ifdef _LP64
+       li      v1, MIPS3_SR_KX | MIPS3_SR_UX   # keep 64-bit addressing on
+       mtc0    v1, MIPS_COP_0_STATUS           ## disable interrupts
+#else
        mtc0    zero, MIPS_COP_0_STATUS         ## disable interrupts
+#endif
        COP0_SYNC
 #if IPL_NONE == 0
        INT_S   zero, CPU_INFO_CPL(a3)          ## set ipl to 0