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/* $NetBSD: userret.h,v 1.5 2003/10/31 16:44:35 cl Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "opt_altivec.h"
#include <sys/userret.h>
#include <powerpc/fpu.h>
/*
* Define the code needed before returning to user mode, for
* trap and syscall.
*/
static __inline void
userret(struct lwp *l, struct trapframe *frame)
{
struct cpu_info *ci = curcpu();
struct pcb *pcb;
/* Invoke MI userret code */
mi_userret(l);
pcb = &l->l_addr->u_pcb;
/*
* If someone stole the fp or vector unit while we were away,
* disable it
*/
#ifdef PPC_HAVE_FPU
if ((pcb->pcb_flags & PCB_FPU) &&
(l != ci->ci_fpulwp || pcb->pcb_fpcpu != ci)) {
frame->srr1 &= ~PSL_FP;
}
#endif
#ifdef ALTIVEC
if ((pcb->pcb_flags & PCB_ALTIVEC) &&
(l != ci->ci_veclwp || pcb->pcb_veccpu != ci)) {
frame->srr1 &= ~PSL_VEC;
}
/*
* If the new process isn't the current AltiVec process on this
* cpu, we need to stop any data streams that are active (since
* it will be a different address space).
*/
if (ci->ci_veclwp != NULL && ci->ci_veclwp != l) {
__asm __volatile("dssall;sync");
}
#endif
ci->ci_schedstate.spc_curpriority = l->l_priority = l->l_usrpri;
}
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