[src/trunk]: src/sys/arch/arm/arm32 Remove unneeded definitions.

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

details:   https://anonhg.NetBSD.org/src/rev/71bf87eb6d73
branches:  trunk
changeset: 783384:71bf87eb6d73
user:      matt <matt%NetBSD.org@localhost>
date:      Tue Dec 18 06:30:18 2012 +0000

description:
Remove unneeded definitions.
When forking a LWP, disable the VFP in the new LWP since it isn't the LWP
that owns the VFP.

diffstat:

 sys/arch/arm/arm32/vm_machdep.c |  34 +++++++++++++++-------------------
 1 files changed, 15 insertions(+), 19 deletions(-)

diffs (79 lines):

diff -r 3238cac80c91 -r 71bf87eb6d73 sys/arch/arm/arm32/vm_machdep.c
--- a/sys/arch/arm/arm32/vm_machdep.c   Tue Dec 18 06:14:23 2012 +0000
+++ b/sys/arch/arm/arm32/vm_machdep.c   Tue Dec 18 06:30:18 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vm_machdep.c,v 1.63 2012/12/10 01:37:31 matt Exp $     */
+/*     $NetBSD: vm_machdep.c,v 1.64 2012/12/18 06:30:18 matt Exp $     */
 
 /*
  * Copyright (c) 1994-1998 Mark Brinicombe.
@@ -44,7 +44,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.63 2012/12/10 01:37:31 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.64 2012/12/18 06:30:18 matt Exp $");
 
 #include "opt_armfpe.h"
 #include "opt_pmap_debug.h"
@@ -64,16 +64,13 @@
 
 #include <uvm/uvm_extern.h>
 
+#include <arm/vfpreg.h>
+
 #include <machine/pcb.h>
 #include <machine/pmap.h>
 #include <machine/reg.h>
 #include <machine/vmparam.h>
 
-extern pv_addr_t systempage;
-
-int process_read_regs(struct proc *p, struct reg *regs);
-int process_read_fpregs(struct proc *p, struct fpreg *regs);
-
 void lwp_trampoline(void);
 
 /*
@@ -114,30 +111,29 @@
 cpu_lwp_fork(struct lwp *l1, struct lwp *l2, void *stack, size_t stacksize,
     void (*func)(void *), void *arg)
 {
-       struct pcb *pcb1, *pcb2;
        struct switchframe *sf;
        vaddr_t uv;
 
-       pcb1 = lwp_getpcb(l1);
-       pcb2 = lwp_getpcb(l2);
+       const struct pcb * const pcb1 = lwp_getpcb(l1);
+       struct pcb * const pcb2 = lwp_getpcb(l2);
 
 #ifdef PMAP_DEBUG
        if (pmap_debug_level >= 0)
                printf("cpu_lwp_fork: %p %p %p %p\n", l1, l2, curlwp, &lwp0);
 #endif /* PMAP_DEBUG */
 
-#if 0 /* XXX */
-       if (l1 == curlwp) {
-               /* Sync the PCB before we copy it. */
-               savectx(curpcb);
-       }
-#endif
-
-       l2->l_md.md_flags = l1->l_md.md_flags & MDLWP_VFPUSED;
-
        /* Copy the pcb */
        *pcb2 = *pcb1;
 
+#ifdef FPU_VFP
+       /*
+        * Disable the VFP for a newly created LWP but remember if the
+        * VFP state is valid.
+        */
+       pcb2->pcb_vfp.vfp_fpexc &= ~VFP_FPEXC_EN;
+       l2->l_md.md_flags = l1->l_md.md_flags & MDLWP_VFPUSED;
+#endif
+
        /* 
         * Set up the kernel stack for the process.
         * Note: this stack is not in use if we are forking from p1