1/*
2 * arch/sh/kernel/cpu/sh5/fpu.c
3 *
4 * Copyright (C) 2001  Manuela Cirronis, Paolo Alberelli
5 * Copyright (C) 2002  STMicroelectronics Limited
6 *   Author : Stuart Menefy
7 *
8 * Started from SH4 version:
9 *   Copyright (C) 1999, 2000  Kaz Kojima & Niibe Yutaka
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License.  See the file "COPYING" in the main directory of this archive
13 * for more details.
14 */
15#include <linux/sched.h>
16#include <linux/signal.h>
17#include <asm/processor.h>
18
19void save_fpu(struct task_struct *tsk)
20{
21	asm volatile("fst.p     %0, (0*8), fp0\n\t"
22		     "fst.p     %0, (1*8), fp2\n\t"
23		     "fst.p     %0, (2*8), fp4\n\t"
24		     "fst.p     %0, (3*8), fp6\n\t"
25		     "fst.p     %0, (4*8), fp8\n\t"
26		     "fst.p     %0, (5*8), fp10\n\t"
27		     "fst.p     %0, (6*8), fp12\n\t"
28		     "fst.p     %0, (7*8), fp14\n\t"
29		     "fst.p     %0, (8*8), fp16\n\t"
30		     "fst.p     %0, (9*8), fp18\n\t"
31		     "fst.p     %0, (10*8), fp20\n\t"
32		     "fst.p     %0, (11*8), fp22\n\t"
33		     "fst.p     %0, (12*8), fp24\n\t"
34		     "fst.p     %0, (13*8), fp26\n\t"
35		     "fst.p     %0, (14*8), fp28\n\t"
36		     "fst.p     %0, (15*8), fp30\n\t"
37		     "fst.p     %0, (16*8), fp32\n\t"
38		     "fst.p     %0, (17*8), fp34\n\t"
39		     "fst.p     %0, (18*8), fp36\n\t"
40		     "fst.p     %0, (19*8), fp38\n\t"
41		     "fst.p     %0, (20*8), fp40\n\t"
42		     "fst.p     %0, (21*8), fp42\n\t"
43		     "fst.p     %0, (22*8), fp44\n\t"
44		     "fst.p     %0, (23*8), fp46\n\t"
45		     "fst.p     %0, (24*8), fp48\n\t"
46		     "fst.p     %0, (25*8), fp50\n\t"
47		     "fst.p     %0, (26*8), fp52\n\t"
48		     "fst.p     %0, (27*8), fp54\n\t"
49		     "fst.p     %0, (28*8), fp56\n\t"
50		     "fst.p     %0, (29*8), fp58\n\t"
51		     "fst.p     %0, (30*8), fp60\n\t"
52		     "fst.p     %0, (31*8), fp62\n\t"
53
54		     "fgetscr   fr63\n\t"
55		     "fst.s     %0, (32*8), fr63\n\t"
56		: /* no output */
57		: "r" (&tsk->thread.xstate->hardfpu)
58		: "memory");
59}
60
61void restore_fpu(struct task_struct *tsk)
62{
63	asm volatile("fld.p     %0, (0*8), fp0\n\t"
64		     "fld.p     %0, (1*8), fp2\n\t"
65		     "fld.p     %0, (2*8), fp4\n\t"
66		     "fld.p     %0, (3*8), fp6\n\t"
67		     "fld.p     %0, (4*8), fp8\n\t"
68		     "fld.p     %0, (5*8), fp10\n\t"
69		     "fld.p     %0, (6*8), fp12\n\t"
70		     "fld.p     %0, (7*8), fp14\n\t"
71		     "fld.p     %0, (8*8), fp16\n\t"
72		     "fld.p     %0, (9*8), fp18\n\t"
73		     "fld.p     %0, (10*8), fp20\n\t"
74		     "fld.p     %0, (11*8), fp22\n\t"
75		     "fld.p     %0, (12*8), fp24\n\t"
76		     "fld.p     %0, (13*8), fp26\n\t"
77		     "fld.p     %0, (14*8), fp28\n\t"
78		     "fld.p     %0, (15*8), fp30\n\t"
79		     "fld.p     %0, (16*8), fp32\n\t"
80		     "fld.p     %0, (17*8), fp34\n\t"
81		     "fld.p     %0, (18*8), fp36\n\t"
82		     "fld.p     %0, (19*8), fp38\n\t"
83		     "fld.p     %0, (20*8), fp40\n\t"
84		     "fld.p     %0, (21*8), fp42\n\t"
85		     "fld.p     %0, (22*8), fp44\n\t"
86		     "fld.p     %0, (23*8), fp46\n\t"
87		     "fld.p     %0, (24*8), fp48\n\t"
88		     "fld.p     %0, (25*8), fp50\n\t"
89		     "fld.p     %0, (26*8), fp52\n\t"
90		     "fld.p     %0, (27*8), fp54\n\t"
91		     "fld.p     %0, (28*8), fp56\n\t"
92		     "fld.p     %0, (29*8), fp58\n\t"
93		     "fld.p     %0, (30*8), fp60\n\t"
94
95		     "fld.s     %0, (32*8), fr63\n\t"
96		     "fputscr   fr63\n\t"
97
98		     "fld.p     %0, (31*8), fp62\n\t"
99		: /* no output */
100		: "r" (&tsk->thread.xstate->hardfpu)
101		: "memory");
102}
103
104asmlinkage void do_fpu_error(unsigned long ex, struct pt_regs *regs)
105{
106	struct task_struct *tsk = current;
107
108	regs->pc += 4;
109
110	force_sig(SIGFPE, tsk);
111}
112