5596676e6c
Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/*-
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* Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. 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 ``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 THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_FP_H_
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#define _MACHINE_FP_H_
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#define FPRS_DL (1 << 0)
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#define FPRS_DU (1 << 1)
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#define FPRS_FEF (1 << 2)
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#define FSR_CEXC_NX (1 << 0)
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#define FSR_CEXC_DZ (1 << 1)
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#define FSR_CEXC_UF (1 << 2)
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#define FSR_CEXC_OF (1 << 3)
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#define FSR_CEXC_NV (1 << 4)
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#define FSR_AEXC_NX (1 << 5)
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#define FSR_AEXC_DZ (1 << 6)
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#define FSR_AEXC_UF (1 << 7)
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#define FSR_AEXC_OF (1 << 8)
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#define FSR_AEXC_NV (1 << 9)
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#define FSR_QNE (1 << 13)
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#define FSR_NS (1 << 22)
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#define FSR_TEM_NX (1 << 23)
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#define FSR_TEM_DZ (1 << 24)
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#define FSR_TEM_UF (1 << 25)
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#define FSR_TEM_OF (1 << 26)
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#define FSR_TEM_NV (1 << 27)
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#define FSR_FCC0_SHIFT 10
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#define FSR_FCC0(x) (((x) >> FSR_FCC0_SHIFT) & 3)
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#define FSR_FTT_SHIFT 14
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#define FSR_FTT(x) (((x) >> FSR_FTT_SHIFT) & 7)
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#define FSR_VER_SHIFT 17
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#define FSR_VER(x) (((x) >> FSR_VER_SHIFT) & 7)
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#define FSR_RD_SHIFT 30
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#define FSR_RD(x) (((x) >> FSR_RD_SHIFT) & 3)
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#define FSR_FCC1_SHIFT 32
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#define FSR_FCC1(x) (((x) >> FSR_FCC1_SHIFT) & 3)
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#define FSR_FCC2_SHIFT 34
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#define FSR_FCC2(x) (((x) >> FSR_FCC2_SHIFT) & 3)
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#define FSR_FCC3_SHIFT 36
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#define FSR_FCC3(x) (((x) >> FSR_FCC3_SHIFT) & 3)
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/* A block of 8 double-precision (16 single-precision) FP registers. */
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struct fpblock {
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u_long fpq_l[8];
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};
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struct fpstate {
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struct fpblock fp_fb[4];
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u_long fp_fsr;
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u_long fp_fprs;
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};
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void fp_init_thread(struct pcb *);
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int fp_enable_thread(struct thread *);
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/*
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* Note: The pointers passed to the next two functions must be aligned on
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* 64 byte boundaries.
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*/
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void savefpctx(struct fpstate *);
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void restorefpctx(struct fpstate *);
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#endif /* !_MACHINE_FP_H_ */
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