[src/trunk]: src/sys/arch/mips/mips Do not touch FP register on softfloat ker...

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

details:   https://anonhg.NetBSD.org/src/rev/2b8863ffb691
branches:  trunk
changeset: 344404:2b8863ffb691
user:      martin <martin%NetBSD.org@localhost>
date:      Sat Mar 26 17:40:02 2016 +0000

description:
Do not touch FP register on softfloat kernels.

diffstat:

 sys/arch/mips/mips/mips_fpu.c |  14 ++++++++++++--
 1 files changed, 12 insertions(+), 2 deletions(-)

diffs (73 lines):

diff -r 8fc4013b4c74 -r 2b8863ffb691 sys/arch/mips/mips/mips_fpu.c
--- a/sys/arch/mips/mips/mips_fpu.c     Sat Mar 26 17:16:48 2016 +0000
+++ b/sys/arch/mips/mips/mips_fpu.c     Sat Mar 26 17:40:02 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mips_fpu.c,v 1.12 2014/05/16 00:48:41 rmind Exp $      */
+/*     $NetBSD: mips_fpu.c,v 1.13 2016/03/26 17:40:02 martin Exp $     */
 
 /*-
  * Copyright (c) 2010 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: mips_fpu.c,v 1.12 2014/05/16 00:48:41 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mips_fpu.c,v 1.13 2016/03/26 17:40:02 martin Exp $");
 
 #include "opt_multiprocessor.h"
 
@@ -85,8 +85,10 @@
 mips_fpu_state_save(lwp_t *l)
 {
        struct trapframe * const tf = l->l_md.md_utf;
+#ifndef __mips_soft_float
        struct pcb * const pcb = lwp_getpcb(l);
        mips_fpreg_t * const fp = pcb->pcb_fpregs.r_regs;
+#endif
        uint32_t status, fpcsr;
 
        /*
@@ -118,6 +120,7 @@
        /*
         * save FPCSR and FP register values.
         */
+#if !defined(__mips_soft_float)
 #if !defined(__mips_o32)
        if (tf->tf_regs[_R_SR] & MIPS3_SR_FR) {
                KASSERT(_MIPS_SIM_NEWABI_P(l->l_proc->p_md.md_abi));
@@ -198,6 +201,7 @@
                        "swc1   $f31, (31*%d1)(%0)      ;"
                ".set reorder" :: "r"(fp), "i"(4));
        }
+#endif
        /*
         * stop COP1
         */
@@ -209,7 +213,9 @@
 {
        struct trapframe * const tf = l->l_md.md_utf;
        struct pcb * const pcb = lwp_getpcb(l);
+#ifndef __mips_soft_float
        mips_fpreg_t * const fp = pcb->pcb_fpregs.r_regs;
+#endif
        uint32_t status;
        uint32_t fpcsr;
 
@@ -244,6 +250,7 @@
        /*
         * load FP registers and establish processes' FP context.
         */
+#if !defined(__mips_soft_float)
 #if !defined(__mips_o32)
        if (tf->tf_regs[_R_SR] & MIPS3_SR_FR) {
                KASSERT(_MIPS_SIM_NEWABI_P(l->l_proc->p_md.md_abi));
@@ -326,6 +333,9 @@
                    : "r"(fp), "i"(4));
                fpcsr = ((int *)fp)[32];
        }
+#else
+       fpcsr = 0;
+#endif
 
        /*
         * load FPCSR and stop COP1 again