From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/arm64/include/asm/fpsimd.h | 86 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 arch/arm64/include/asm/fpsimd.h (limited to 'arch/arm64/include/asm/fpsimd.h') diff --git a/arch/arm64/include/asm/fpsimd.h b/arch/arm64/include/asm/fpsimd.h new file mode 100644 index 000000000..50f559f57 --- /dev/null +++ b/arch/arm64/include/asm/fpsimd.h @@ -0,0 +1,86 @@ +/* + * 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 . + */ +#ifndef __ASM_FP_H +#define __ASM_FP_H + +#include + +#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; + }; + }; + /* the id of the last cpu to have restored this state */ + unsigned int cpu; +}; + +/* + * Struct for stacking the bottom 'n' FP/SIMD registers. + */ +struct fpsimd_partial_state { + u32 fpsr; + u32 fpcr; + u32 num_regs; + __uint128_t vregs[32]; +}; + + +#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); + +extern void fpsimd_preserve_current_state(void); +extern void fpsimd_restore_current_state(void); +extern void fpsimd_update_current_state(struct fpsimd_state *state); + +extern void fpsimd_flush_task_state(struct task_struct *target); + +extern void fpsimd_save_partial_state(struct fpsimd_partial_state *state, + u32 num_regs); +extern void fpsimd_load_partial_state(struct fpsimd_partial_state *state); + +#endif + +#endif -- cgit v1.2.3