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_fpsimd forms a prefix of this structure, which is 29 * relied upon in the ptrace FP/SIMD accessors. 30 */ 31 struct fpsimd_state { 32 union { 33 struct user_fpsimd_state user_fpsimd; 34 struct { 35 __uint128_t vregs[32]; 36 u32 fpsr; 37 u32 fpcr; 38 }; 39 }; 40 }; 41 42 #if defined(__KERNEL__) && defined(CONFIG_COMPAT) 43 /* Masks for extracting the FPSR and FPCR from the FPSCR */ 44 #define VFP_FPSCR_STAT_MASK 0xf800009f 45 #define VFP_FPSCR_CTRL_MASK 0x07f79f00 46 /* 47 * The VFP state has 32x64-bit registers and a single 32-bit 48 * control/status register. 49 */ 50 #define VFP_STATE_SIZE ((32 * 8) + 4) 51 #endif 52 53 struct task_struct; 54 55 extern void fpsimd_save_state(struct fpsimd_state *state); 56 extern void fpsimd_load_state(struct fpsimd_state *state); 57 58 extern void fpsimd_thread_switch(struct task_struct *next); 59 extern void fpsimd_flush_thread(void); 60 61 #endif 62 63 #endif 64