| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 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 */ |
| 17 | struct 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 | |
| 38 | struct arc_fpu { |
| 39 | unsigned int ctrl, status; |
| 40 | }; |
| 41 | |
| 42 | extern void fpu_init_task(struct pt_regs *regs); |
| 43 | |
| 44 | #endif /* !CONFIG_ISA_ARCOMPACT */ |
| 45 | |
| 46 | struct task_struct; |
| 47 | |
| 48 | extern 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 */ |