5035def0b9
Remove fault-based FPU state saving and loading. Signed-off-by: Indan Zupancic <indan@nul.nu> Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
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* Copyright 2020, Data61, CSIRO (ABN 41 687 119 230)
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*
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#pragma once
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#include <config.h>
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#include <object/structures.h>
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#include <model/statedata.h>
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#include <arch/machine/fpu.h>
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#ifdef CONFIG_HAVE_FPU
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/* Perform any actions required for the deletion of the given thread. */
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void fpuThreadDelete(tcb_t *thread);
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void switchLocalFpuOwner(user_fpu_state_t *new_owner);
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/* Switch the current owner of the FPU state on the core specified by 'cpu'. */
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void switchFpuOwner(user_fpu_state_t *new_owner, word_t cpu);
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/* Returns whether or not the passed thread is using the current active fpu state */
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static inline bool_t nativeThreadUsingFPU(tcb_t *thread)
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{
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return &thread->tcbArch.tcbContext.fpuState ==
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NODE_STATE_ON_CORE(ksActiveFPUState, thread->tcbAffinity);
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}
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/* Called without global lock held! */
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static inline void FORCE_INLINE lazyFPURestore(tcb_t *thread)
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{
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if (thread->tcbFlags & seL4_TCBFlag_fpuDisabled) {
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disableFpu();
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} else if (nativeThreadUsingFPU(thread)) {
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enableFpu();
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} else {
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switchLocalFpuOwner(&thread->tcbArch.tcbContext.fpuState);
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}
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}
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#endif /* CONFIG_HAVE_FPU */
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