7dafcb6914
used to support block copy and zero operations in the kernel which use the floating point registers. - While I'm changing the size, improve the layout of struct pcb, sort by size, then alphabetical etc. - Add some assertions to validate assumptions made about how the pcb is allocated.
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/*-
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* Copyright (c) 2001 Jake Burkholder.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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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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#include <machine/frame.h>
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#define MAXWIN 8
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#define PCB_FEF (1 << 0)
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/* NOTE: pcb_ufp must be aligned on a 64 byte boundary. */
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struct pcb {
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struct rwindow pcb_rw[MAXWIN];
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uint32_t pcb_kfp[64];
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uint32_t pcb_ufp[64];
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uint64_t pcb_rwsp[MAXWIN];
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uint64_t pcb_flags;
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uint64_t pcb_nsaved;
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uint64_t pcb_pc;
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uint64_t pcb_sp;
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uint64_t pcb_pad[4];
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} __aligned(64);
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#ifdef _KERNEL
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int savectx(struct pcb *pcb);
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#endif
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#endif /* !_MACHINE_PCB_H_ */
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