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/*
* Copyright (C) 2012 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ASM_FP_H
#define __ASM_FP_H
#include <asm/ptrace.h>
#ifndef __ASSEMBLY__
/*
* FP/SIMD storage area has:
* - FPSR and FPCR
* - 32 128-bit data registers
*
* Note that user_fpsimd forms a prefix of this structure, which is
* relied upon in the ptrace FP/SIMD accessors.
*/
struct fpsimd_state {
union {
struct user_fpsimd_state user_fpsimd;
struct {
__uint128_t vregs[32];
u32 fpsr;
u32 fpcr;
};
};
};
#if defined(__KERNEL__) && defined(CONFIG_COMPAT)
/* Masks for extracting the FPSR and FPCR from the FPSCR */
#define VFP_FPSCR_STAT_MASK 0xf800009f
#define VFP_FPSCR_CTRL_MASK 0x07f79f00
/*
* The VFP state has 32x64-bit registers and a single 32-bit
* control/status register.
*/
#define VFP_STATE_SIZE ((32 * 8) + 4)
#endif
struct task_struct;
extern void fpsimd_save_state(struct fpsimd_state *state);
extern void fpsimd_load_state(struct fpsimd_state *state);
extern void fpsimd_thread_switch(struct task_struct *next);
extern void fpsimd_flush_thread(void);
#endif
#endif