1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
4 *
5 */
6
7#ifndef _ASM_ARC_FPU_H
8#define _ASM_ARC_FPU_H
9
10#ifdef CONFIG_ARC_FPU_SAVE_RESTORE
11
12#include <asm/ptrace.h>
13
14#ifdef CONFIG_ISA_ARCOMPACT
15
16/* These DPFP regs need to be saved/restored across ctx-sw */
17struct arc_fpu {
18	struct {
19		unsigned int l, h;
20	} aux_dpfp[2];
21};
22
23#define fpu_init_task(regs)
24
25#else
26
27/*
28 * ARCv2 FPU Control aux register
29 *   - bits to enable Traps on Exceptions
30 *   - Rounding mode
31 *
32 * ARCv2 FPU Status aux register
33 *   - FPU exceptions flags (Inv, Div-by-Zero, overflow, underflow, inexact)
34 *   - Flag Write Enable to clear flags explicitly (vs. by fpu instructions
35 *     only
36 */
37
38struct arc_fpu {
39	unsigned int ctrl, status;
40};
41
42extern void fpu_init_task(struct pt_regs *regs);
43
44#endif	/* !CONFIG_ISA_ARCOMPACT */
45
46struct task_struct;
47
48extern void fpu_save_restore(struct task_struct *p, struct task_struct *n);
49
50#else	/* !CONFIG_ARC_FPU_SAVE_RESTORE */
51
52#define fpu_save_restore(p, n)
53#define fpu_init_task(regs)
54
55#endif	/* CONFIG_ARC_FPU_SAVE_RESTORE */
56
57#endif	/* _ASM_ARC_FPU_H */
58