Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm64 / include / asm / fpsimd.h

diff --git a/kernel/arch/arm64/include/asm/fpsimd.h b/kernel/arch/arm64/include/asm/fpsimd.h
new file mode 100644 (file)
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+++ b/kernel/arch/arm64/include/asm/fpsimd.h
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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;
+               };
+       };
+       /* 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