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f86c114f3d
and save/restore during a context switch. The USER_SR could be overwritten when the current thread was switched out with a faulting copyin/copyout. Approved by: Benno
71 lines
2.7 KiB
C
71 lines
2.7 KiB
C
/*-
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: pcb.h,v 1.4 2000/06/04 11:57:17 tsubai Exp $
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PCB_H_
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#define _MACHINE_PCB_H_
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typedef int faultbuf[23];
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struct pcb {
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register_t pcb_context[20]; /* non-volatile r14-r31 */
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register_t pcb_cr; /* Condition register */
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register_t pcb_sp; /* stack pointer */
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register_t pcb_lr; /* link register */
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register_t pcb_usr; /* USER_SR segment register */
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struct pmap *pcb_pm; /* pmap of our vmspace */
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struct pmap *pcb_pmreal; /* real address of above */
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faultbuf *pcb_onfault; /* For use during
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copyin/copyout */
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int pcb_flags;
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#define PCB_FPU 1 /* Process had FPU initialized */
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struct fpu {
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double fpr[32];
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double fpscr; /* FPSCR stored as double for easier access */
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} pcb_fpu; /* Floating point processor */
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unsigned int pcb_fpcpu; /* which CPU had our FPU
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stuff. */
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};
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#ifdef _KERNEL
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#ifndef curpcb
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extern struct pcb *curpcb;
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#endif
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extern struct pmap *curpm;
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extern struct proc *fpuproc;
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#endif
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#endif /* _MACHINE_PCB_H_ */
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