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npx.c (267767) npx.c (270850)
1/*-
2 * Copyright (c) 1990 William Jolitz.
3 * Copyright (c) 1991 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * from: @(#)npx.c 7.2 (Berkeley) 5/12/91
31 */
32
33#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 1990 William Jolitz.
3 * Copyright (c) 1991 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * from: @(#)npx.c 7.2 (Berkeley) 5/12/91
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/i386/isa/npx.c 267767 2014-06-23 07:37:54Z kib $");
34__FBSDID("$FreeBSD: head/sys/i386/isa/npx.c 270850 2014-08-30 17:48:38Z jhb $");
35
36#include "opt_cpu.h"
37#include "opt_isa.h"
38#include "opt_npx.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/bus.h>

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756
757 stop_emulating();
758 fpusave(addr);
759
760 start_emulating();
761 PCPU_SET(fpcurthread, NULL);
762}
763
35
36#include "opt_cpu.h"
37#include "opt_isa.h"
38#include "opt_npx.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/bus.h>

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756
757 stop_emulating();
758 fpusave(addr);
759
760 start_emulating();
761 PCPU_SET(fpcurthread, NULL);
762}
763
764/*
765 * Unconditionally save the current co-processor state across suspend and
766 * resume.
767 */
764void
768void
769npxsuspend(union savefpu *addr)
770{
771 register_t cr0;
772
773 if (!hw_float)
774 return;
775 if (PCPU_GET(fpcurthread) == NULL) {
776 *addr = npx_initialstate;
777 return;
778 }
779 cr0 = rcr0();
780 clts();
781 fpusave(addr);
782 load_cr0(cr0);
783}
784
785void
786npxresume(union savefpu *addr)
787{
788 register_t cr0;
789
790 if (!hw_float)
791 return;
792
793 cr0 = rcr0();
794 clts();
795 npxinit();
796 stop_emulating();
797 fpurstor(addr);
798 load_cr0(cr0);
799}
800
801void
765npxdrop()
766{
767 struct thread *td;
768
769 /*
770 * Discard pending exceptions in the !cpu_fxsr case so that unmasked
771 * ones don't cause a panic on the next frstor.
772 */

--- 353 unchanged lines hidden --- 		802npxdrop()
803{
804 struct thread *td;
805
806 /*
807 * Discard pending exceptions in the !cpu_fxsr case so that unmasked
808 * ones don't cause a panic on the next frstor.
809 */

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