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 65