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53631b54 CM |
1 | /* |
2 | * Copyright (C) 2012 ARM Ltd. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | */ | |
16 | #ifndef __ASM_FP_H | |
17 | #define __ASM_FP_H | |
18 | ||
19 | #include <asm/ptrace.h> | |
20 | ||
21 | #ifndef __ASSEMBLY__ | |
22 | ||
23 | /* | |
24 | * FP/SIMD storage area has: | |
25 | * - FPSR and FPCR | |
26 | * - 32 128-bit data registers | |
27 | * | |
28 | * Note that user_fp forms a prefix of this structure, which is relied | |
29 | * upon in the ptrace FP/SIMD accessors. struct user_fpsimd_state must | |
30 | * form a prefix of struct fpsimd_state. | |
31 | */ | |
32 | struct fpsimd_state { | |
33 | union { | |
34 | struct user_fpsimd_state user_fpsimd; | |
35 | struct { | |
36 | __uint128_t vregs[32]; | |
37 | u32 fpsr; | |
38 | u32 fpcr; | |
39 | }; | |
40 | }; | |
41 | }; | |
42 | ||
43 | #if defined(__KERNEL__) && defined(CONFIG_COMPAT) | |
44 | /* Masks for extracting the FPSR and FPCR from the FPSCR */ | |
45 | #define VFP_FPSCR_STAT_MASK 0xf800009f | |
46 | #define VFP_FPSCR_CTRL_MASK 0x07f79f00 | |
47 | /* | |
48 | * The VFP state has 32x64-bit registers and a single 32-bit | |
49 | * control/status register. | |
50 | */ | |
51 | #define VFP_STATE_SIZE ((32 * 8) + 4) | |
52 | #endif | |
53 | ||
54 | struct task_struct; | |
55 | ||
56 | extern void fpsimd_save_state(struct fpsimd_state *state); | |
57 | extern void fpsimd_load_state(struct fpsimd_state *state); | |
58 | ||
59 | extern void fpsimd_thread_switch(struct task_struct *next); | |
60 | extern void fpsimd_flush_thread(void); | |
61 | ||
62 | #endif | |
63 | ||
64 | #endif |