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}