1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * from: @(#)npx.h 5.3 (Berkeley) 1/18/91
| 1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * from: @(#)npx.h 5.3 (Berkeley) 1/18/91
|
33 * $FreeBSD: head/sys/i386/include/npx.h 189418 2009-03-05 18:32:43Z jhb $
| 33 * $FreeBSD: head/sys/i386/include/npx.h 208833 2010-06-05 15:59:59Z kib $
|
34 */
35
36/*
37 * 287/387 NPX Coprocessor Data Structures and Constants
38 * W. Jolitz 1/90
39 */
40
41#ifndef _MACHINE_NPX_H_
42#define _MACHINE_NPX_H_
43
44/* Environment information of floating point unit */
45struct env87 {
46 long en_cw; /* control word (16bits) */
47 long en_sw; /* status word (16bits) */
48 long en_tw; /* tag word (16bits) */
49 long en_fip; /* floating point instruction pointer */
50 u_short en_fcs; /* floating code segment selector */
51 u_short en_opcode; /* opcode last executed (11 bits ) */
52 long en_foo; /* floating operand offset */
53 long en_fos; /* floating operand segment selector */
54};
55
56/* Contents of each floating point accumulator */
57struct fpacc87 {
58#ifdef dontdef /* too unportable */
59 u_long fp_mantlo; /* mantissa low (31:0) */
60 u_long fp_manthi; /* mantissa high (63:32) */
61 int fp_exp:15; /* exponent */
62 int fp_sgn:1; /* mantissa sign */
63#else
64 u_char fp_bytes[10];
65#endif
66};
67
68/* Floating point context */
69struct save87 {
70 struct env87 sv_env; /* floating point control/status */
71 struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */
72 u_char sv_pad0[4]; /* padding for (now unused) saved status word */
73 /*
74 * Bogus padding for emulators. Emulators should use their own
75 * struct and arrange to store into this struct (ending here)
76 * before it is inspected for ptracing or for core dumps. Some
77 * emulators overwrite the whole struct. We have no good way of
78 * knowing how much padding to leave. Leave just enough for the
79 * GPL emulator's i387_union (176 bytes total).
80 */
81 u_char sv_pad[64]; /* padding; used by emulators */
82};
83
84struct envxmm {
85 u_int16_t en_cw; /* control word (16bits) */
86 u_int16_t en_sw; /* status word (16bits) */
87 u_int16_t en_tw; /* tag word (16bits) */
88 u_int16_t en_opcode; /* opcode last executed (11 bits ) */
89 u_int32_t en_fip; /* floating point instruction pointer */
90 u_int16_t en_fcs; /* floating code segment selector */
91 u_int16_t en_pad0; /* padding */
92 u_int32_t en_foo; /* floating operand offset */
93 u_int16_t en_fos; /* floating operand segment selector */
94 u_int16_t en_pad1; /* padding */
95 u_int32_t en_mxcsr; /* SSE control/status register */
96 u_int32_t en_mxcsr_mask; /* valid bits in mxcsr */
97};
98
99/* Contents of each SSE extended accumulator */
100struct xmmacc {
101 u_char xmm_bytes[16];
102};
103
104struct savexmm {
105 struct envxmm sv_env;
106 struct {
107 struct fpacc87 fp_acc;
108 u_char fp_pad[6]; /* padding */
109 } sv_fp[8];
110 struct xmmacc sv_xmm[8];
111 u_char sv_pad[224];
112} __aligned(16);
113
114union savefpu {
115 struct save87 sv_87;
116 struct savexmm sv_xmm;
117};
118
119/*
120 * The hardware default control word for i387's and later coprocessors is
121 * 0x37F, giving:
122 *
123 * round to nearest
124 * 64-bit precision
125 * all exceptions masked.
126 *
127 * We modify the affine mode bit and precision bits in this to give:
128 *
129 * affine mode for 287's (if they work at all) (1 in bitfield 1<<12)
130 * 53-bit precision (2 in bitfield 3<<8)
131 *
132 * 64-bit precision often gives bad results with high level languages
133 * because it makes the results of calculations depend on whether
134 * intermediate values are stored in memory or in FPU registers.
135 */
136#define __INITIAL_NPXCW__ 0x127F
137#define __INITIAL_MXCSR__ 0x1F80
138
139#ifdef _KERNEL
140
141#define IO_NPX 0x0F0 /* Numeric Coprocessor */
142#define IO_NPXSIZE 16 /* 80387/80487 NPX registers */
143
144#define IRQ_NPX 13
145
| 34 */
35
36/*
37 * 287/387 NPX Coprocessor Data Structures and Constants
38 * W. Jolitz 1/90
39 */
40
41#ifndef _MACHINE_NPX_H_
42#define _MACHINE_NPX_H_
43
44/* Environment information of floating point unit */
45struct env87 {
46 long en_cw; /* control word (16bits) */
47 long en_sw; /* status word (16bits) */
48 long en_tw; /* tag word (16bits) */
49 long en_fip; /* floating point instruction pointer */
50 u_short en_fcs; /* floating code segment selector */
51 u_short en_opcode; /* opcode last executed (11 bits ) */
52 long en_foo; /* floating operand offset */
53 long en_fos; /* floating operand segment selector */
54};
55
56/* Contents of each floating point accumulator */
57struct fpacc87 {
58#ifdef dontdef /* too unportable */
59 u_long fp_mantlo; /* mantissa low (31:0) */
60 u_long fp_manthi; /* mantissa high (63:32) */
61 int fp_exp:15; /* exponent */
62 int fp_sgn:1; /* mantissa sign */
63#else
64 u_char fp_bytes[10];
65#endif
66};
67
68/* Floating point context */
69struct save87 {
70 struct env87 sv_env; /* floating point control/status */
71 struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */
72 u_char sv_pad0[4]; /* padding for (now unused) saved status word */
73 /*
74 * Bogus padding for emulators. Emulators should use their own
75 * struct and arrange to store into this struct (ending here)
76 * before it is inspected for ptracing or for core dumps. Some
77 * emulators overwrite the whole struct. We have no good way of
78 * knowing how much padding to leave. Leave just enough for the
79 * GPL emulator's i387_union (176 bytes total).
80 */
81 u_char sv_pad[64]; /* padding; used by emulators */
82};
83
84struct envxmm {
85 u_int16_t en_cw; /* control word (16bits) */
86 u_int16_t en_sw; /* status word (16bits) */
87 u_int16_t en_tw; /* tag word (16bits) */
88 u_int16_t en_opcode; /* opcode last executed (11 bits ) */
89 u_int32_t en_fip; /* floating point instruction pointer */
90 u_int16_t en_fcs; /* floating code segment selector */
91 u_int16_t en_pad0; /* padding */
92 u_int32_t en_foo; /* floating operand offset */
93 u_int16_t en_fos; /* floating operand segment selector */
94 u_int16_t en_pad1; /* padding */
95 u_int32_t en_mxcsr; /* SSE control/status register */
96 u_int32_t en_mxcsr_mask; /* valid bits in mxcsr */
97};
98
99/* Contents of each SSE extended accumulator */
100struct xmmacc {
101 u_char xmm_bytes[16];
102};
103
104struct savexmm {
105 struct envxmm sv_env;
106 struct {
107 struct fpacc87 fp_acc;
108 u_char fp_pad[6]; /* padding */
109 } sv_fp[8];
110 struct xmmacc sv_xmm[8];
111 u_char sv_pad[224];
112} __aligned(16);
113
114union savefpu {
115 struct save87 sv_87;
116 struct savexmm sv_xmm;
117};
118
119/*
120 * The hardware default control word for i387's and later coprocessors is
121 * 0x37F, giving:
122 *
123 * round to nearest
124 * 64-bit precision
125 * all exceptions masked.
126 *
127 * We modify the affine mode bit and precision bits in this to give:
128 *
129 * affine mode for 287's (if they work at all) (1 in bitfield 1<<12)
130 * 53-bit precision (2 in bitfield 3<<8)
131 *
132 * 64-bit precision often gives bad results with high level languages
133 * because it makes the results of calculations depend on whether
134 * intermediate values are stored in memory or in FPU registers.
135 */
136#define __INITIAL_NPXCW__ 0x127F
137#define __INITIAL_MXCSR__ 0x1F80
138
139#ifdef _KERNEL
140
141#define IO_NPX 0x0F0 /* Numeric Coprocessor */
142#define IO_NPXSIZE 16 /* 80387/80487 NPX registers */
143
144#define IRQ_NPX 13
145
|
| 146struct fpu_kern_ctx {
147 union savefpu hwstate;
148 union savefpu *prev;
149 uint32_t flags;
150};
151#define FPU_KERN_CTX_NPXINITDONE 0x01
152
153#define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNNPX) == 0)
154
|
146/* full reset on some systems, NOP on others */
147#define npx_full_reset() outb(IO_NPX + 1, 0)
148
149int npxdna(void);
150void npxdrop(void);
151void npxexit(struct thread *td);
152int npxformat(void);
153int npxgetregs(struct thread *td, union savefpu *addr);
| 155/* full reset on some systems, NOP on others */
156#define npx_full_reset() outb(IO_NPX + 1, 0)
157
158int npxdna(void);
159void npxdrop(void);
160void npxexit(struct thread *td);
161int npxformat(void);
162int npxgetregs(struct thread *td, union savefpu *addr);
|
| 163int npxgetuserregs(struct thread *td, union savefpu *addr);
|
154void npxinit(void);
155void npxsave(union savefpu *addr);
156void npxsetregs(struct thread *td, union savefpu *addr);
| 164void npxinit(void);
165void npxsave(union savefpu *addr);
166void npxsetregs(struct thread *td, union savefpu *addr);
|
| 167void npxsetuserregs(struct thread *td, union savefpu *addr);
|
157int npxtrap(void);
| 168int npxtrap(void);
|
| 169int fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
170 u_int flags);
171int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
172int fpu_kern_thread(u_int flags);
173int is_fpu_kern_thread(u_int flags);
|
158
| 174
|
| 175/*
176 * Flags for fpu_kern_enter() and fpu_kern_thread().
177 */
178#define FPU_KERN_NORMAL 0x0000
179
|
159#endif
160
161#endif /* !_MACHINE_NPX_H_ */
| 180#endif
181
182#endif /* !_MACHINE_NPX_H_ */
|