| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * arch/sh/kernel/cpu/sh5/fpu.c |
| 4 | * |
| 5 | * Copyright (C) 2001 Manuela Cirronis, Paolo Alberelli |
| 6 | * Copyright (C) 2002 STMicroelectronics Limited |
| 7 | * Author : Stuart Menefy |
| 8 | * |
| 9 | * Started from SH4 version: |
| 10 | * Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka |
| 11 | */ |
| 12 | #include <linux/sched.h> |
| 13 | #include <linux/signal.h> |
| 14 | #include <asm/processor.h> |
| 15 | |
| 16 | void save_fpu(struct task_struct *tsk) |
| 17 | { |
| 18 | asm volatile("fst.p %0, (0*8), fp0\n\t" |
| 19 | "fst.p %0, (1*8), fp2\n\t" |
| 20 | "fst.p %0, (2*8), fp4\n\t" |
| 21 | "fst.p %0, (3*8), fp6\n\t" |
| 22 | "fst.p %0, (4*8), fp8\n\t" |
| 23 | "fst.p %0, (5*8), fp10\n\t" |
| 24 | "fst.p %0, (6*8), fp12\n\t" |
| 25 | "fst.p %0, (7*8), fp14\n\t" |
| 26 | "fst.p %0, (8*8), fp16\n\t" |
| 27 | "fst.p %0, (9*8), fp18\n\t" |
| 28 | "fst.p %0, (10*8), fp20\n\t" |
| 29 | "fst.p %0, (11*8), fp22\n\t" |
| 30 | "fst.p %0, (12*8), fp24\n\t" |
| 31 | "fst.p %0, (13*8), fp26\n\t" |
| 32 | "fst.p %0, (14*8), fp28\n\t" |
| 33 | "fst.p %0, (15*8), fp30\n\t" |
| 34 | "fst.p %0, (16*8), fp32\n\t" |
| 35 | "fst.p %0, (17*8), fp34\n\t" |
| 36 | "fst.p %0, (18*8), fp36\n\t" |
| 37 | "fst.p %0, (19*8), fp38\n\t" |
| 38 | "fst.p %0, (20*8), fp40\n\t" |
| 39 | "fst.p %0, (21*8), fp42\n\t" |
| 40 | "fst.p %0, (22*8), fp44\n\t" |
| 41 | "fst.p %0, (23*8), fp46\n\t" |
| 42 | "fst.p %0, (24*8), fp48\n\t" |
| 43 | "fst.p %0, (25*8), fp50\n\t" |
| 44 | "fst.p %0, (26*8), fp52\n\t" |
| 45 | "fst.p %0, (27*8), fp54\n\t" |
| 46 | "fst.p %0, (28*8), fp56\n\t" |
| 47 | "fst.p %0, (29*8), fp58\n\t" |
| 48 | "fst.p %0, (30*8), fp60\n\t" |
| 49 | "fst.p %0, (31*8), fp62\n\t" |
| 50 | |
| 51 | "fgetscr fr63\n\t" |
| 52 | "fst.s %0, (32*8), fr63\n\t" |
| 53 | : /* no output */ |
| 54 | : "r" (&tsk->thread.xstate->hardfpu) |
| 55 | : "memory"); |
| 56 | } |
| 57 | |
| 58 | void restore_fpu(struct task_struct *tsk) |
| 59 | { |
| 60 | asm volatile("fld.p %0, (0*8), fp0\n\t" |
| 61 | "fld.p %0, (1*8), fp2\n\t" |
| 62 | "fld.p %0, (2*8), fp4\n\t" |
| 63 | "fld.p %0, (3*8), fp6\n\t" |
| 64 | "fld.p %0, (4*8), fp8\n\t" |
| 65 | "fld.p %0, (5*8), fp10\n\t" |
| 66 | "fld.p %0, (6*8), fp12\n\t" |
| 67 | "fld.p %0, (7*8), fp14\n\t" |
| 68 | "fld.p %0, (8*8), fp16\n\t" |
| 69 | "fld.p %0, (9*8), fp18\n\t" |
| 70 | "fld.p %0, (10*8), fp20\n\t" |
| 71 | "fld.p %0, (11*8), fp22\n\t" |
| 72 | "fld.p %0, (12*8), fp24\n\t" |
| 73 | "fld.p %0, (13*8), fp26\n\t" |
| 74 | "fld.p %0, (14*8), fp28\n\t" |
| 75 | "fld.p %0, (15*8), fp30\n\t" |
| 76 | "fld.p %0, (16*8), fp32\n\t" |
| 77 | "fld.p %0, (17*8), fp34\n\t" |
| 78 | "fld.p %0, (18*8), fp36\n\t" |
| 79 | "fld.p %0, (19*8), fp38\n\t" |
| 80 | "fld.p %0, (20*8), fp40\n\t" |
| 81 | "fld.p %0, (21*8), fp42\n\t" |
| 82 | "fld.p %0, (22*8), fp44\n\t" |
| 83 | "fld.p %0, (23*8), fp46\n\t" |
| 84 | "fld.p %0, (24*8), fp48\n\t" |
| 85 | "fld.p %0, (25*8), fp50\n\t" |
| 86 | "fld.p %0, (26*8), fp52\n\t" |
| 87 | "fld.p %0, (27*8), fp54\n\t" |
| 88 | "fld.p %0, (28*8), fp56\n\t" |
| 89 | "fld.p %0, (29*8), fp58\n\t" |
| 90 | "fld.p %0, (30*8), fp60\n\t" |
| 91 | |
| 92 | "fld.s %0, (32*8), fr63\n\t" |
| 93 | "fputscr fr63\n\t" |
| 94 | |
| 95 | "fld.p %0, (31*8), fp62\n\t" |
| 96 | : /* no output */ |
| 97 | : "r" (&tsk->thread.xstate->hardfpu) |
| 98 | : "memory"); |
| 99 | } |
| 100 | |
| 101 | asmlinkage void do_fpu_error(unsigned long ex, struct pt_regs *regs) |
| 102 | { |
| 103 | regs->pc += 4; |
| 104 | |
| 105 | force_sig(SIGFPE); |
| 106 | } |