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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30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * from: @(#)npx.c 7.2 (Berkeley) 5/12/91
35 */
36
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD: head/sys/i386/isa/npx.c 117870 2003-07-22 08:11:17Z peter $");
39
40#include "opt_cpu.h"
41#include "opt_debug_npx.h"
42#include "opt_isa.h"
43#include "opt_npx.h"
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/bus.h>
48#include <sys/kernel.h>
49#include <sys/lock.h>
50#include <sys/malloc.h>

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100/*
101 * 387 and 287 Numeric Coprocessor Extension (NPX) Driver.
102 */
103
104/* Configuration flags. */
105#define NPX_DISABLE_I586_OPTIMIZED_BCOPY (1 << 0)
106#define NPX_DISABLE_I586_OPTIMIZED_BZERO (1 << 1)
107#define NPX_DISABLE_I586_OPTIMIZED_COPYIO (1 << 2)
108
109#if defined(__GNUC__) && !defined(lint)
110
111#define fldcw(addr) __asm("fldcw %0" : : "m" (*(addr)))
112#define fnclex() __asm("fnclex")
113#define fninit() __asm("fninit")
114#define fnsave(addr) __asm __volatile("fnsave %0" : "=m" (*(addr)))
115#define fnstcw(addr) __asm __volatile("fnstcw %0" : "=m" (*(addr)))

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463 if (resource_int_value("npx", 0, "flags", &flags) != 0)
464 flags = 0;
465
466 if (flags)
467 device_printf(dev, "flags 0x%x ", flags);
468 if (npx_irq13) {
469 device_printf(dev, "using IRQ 13 interface\n");
470 } else {
471 if (npx_ex16)
472 device_printf(dev, "INT 16 interface\n");
473 else
474 device_printf(dev, "WARNING: no FPU!\n");
475 }
476 npxinit(__INITIAL_NPXCW__);
477
478 if (npx_cleanstate_ready == 0) {
479 s = intr_disable();
480 stop_emulating();
481 fpusave(&npx_cleanstate);
482 start_emulating();

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