[src/trunk]: src/sys/arch/arm/vfp Not only check to see if we own the VFP but...

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

details:   https://anonhg.NetBSD.org/src/rev/079e8d8429d8
branches:  trunk
changeset: 336787:079e8d8429d8
user:      matt <matt%NetBSD.org@localhost>
date:      Fri Mar 20 00:54:30 2015 +0000

description:
Not only check to see if we own the VFP but that the VFP is enabled.

diffstat:

 sys/arch/arm/vfp/vfp_init.c |  10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diffs (32 lines):

diff -r 426fd6ded786 -r 079e8d8429d8 sys/arch/arm/vfp/vfp_init.c
--- a/sys/arch/arm/vfp/vfp_init.c       Thu Mar 19 22:57:45 2015 +0000
+++ b/sys/arch/arm/vfp/vfp_init.c       Fri Mar 20 00:54:30 2015 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: vfp_init.c,v 1.44 2015/03/17 22:34:10 matt Exp $ */
+/*      $NetBSD: vfp_init.c,v 1.45 2015/03/20 00:54:30 matt Exp $ */
 
 /*
  * Copyright (c) 2008 ARM Ltd
@@ -402,8 +402,9 @@
        if (!vfp_fpscr_handler(address, insn, frame, fault_code))
                return 1;
 
-       /* if we already own the FPU, raise SIGILL */
+       /* if we already own the FPU and it's enabled, raise SIGILL */
        if (curcpu()->ci_pcu_curlwp[PCU_FPU] == curlwp)
+           && (armreg_fpexc_read() & VFP_FPEXC_EN) != 0)
                return 0;
 
        /*
@@ -473,8 +474,9 @@
        if (fault_code != FAULT_USER)
                panic("NEON fault in non-user mode");
 
-       /* if we already own the FPU, raise SIGILL */
-       if (curcpu()->ci_pcu_curlwp[PCU_FPU] == curlwp)
+       /* if we already own the FPU and it's enabled, raise SIGILL */
+       if (curcpu()->ci_pcu_curlwp[PCU_FPU] == curlwp
+           && (armreg_fpexc_read() & VFP_FPEXC_EN) != 0)
                return 0;
 
        pcu_load(&arm_vfp_ops);