/*
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* Copyright (C) 2006 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>.
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*
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* Xenomai is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License,
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* or (at your option) any later version.
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*
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* Xenomai is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Xenomai; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef _COBALT_X86_ASM_FPTEST_H
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#define _COBALT_X86_ASM_FPTEST_H
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#include <linux/errno.h>
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#include <asm/processor.h>
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#include <asm/xenomai/wrappers.h>
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#include <asm/xenomai/uapi/fptest.h>
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/*
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* We do NOT support out-of-band FPU operations in kernel space for a
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* reason: this is a mess. Out-of-band FPU is just fine and makes a
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* lot of sense for many real-time applications, but you have to do
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* that from userland.
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*/
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static inline int fp_kernel_supported(void)
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{
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return 0;
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}
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static inline void fp_init(void)
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{
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}
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static inline int fp_linux_begin(void)
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{
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kernel_fpu_begin();
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/*
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* We need a clean context for testing the sanity of the FPU
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* register stack across switches in fp_regs_check()
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* (fildl->fistpl), which kernel_fpu_begin() does not
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* guarantee us. Force this manually.
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*/
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asm volatile("fninit");
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return true;
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}
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static inline void fp_linux_end(void)
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{
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kernel_fpu_end();
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}
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static inline int fp_detect(void)
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{
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int features = 0;
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if (boot_cpu_has(X86_FEATURE_XMM2))
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features |= __COBALT_HAVE_SSE2;
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if (boot_cpu_has(X86_FEATURE_AVX))
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features |= __COBALT_HAVE_AVX;
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return features;
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}
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#endif /* _COBALT_X86_ASM_FPTEST_H */
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