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 tsk->thread.trap_no = 11; 111 tsk->thread.error_code = 0; 112 113 force_sig(SIGFPE, tsk); 114} 115