512a0200de
All the kernel header files now use pargma once rather than the ifndef, as the pre-processed C files do not change while header files are protected with pargma once. This will also solve any naming issues caused by ifndef.
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/*
|
|
* Copyright 2020, Data61, CSIRO (ABN 41 687 119 230)
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-only
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <config.h>
|
|
#include <object/structures.h>
|
|
#include <model/statedata.h>
|
|
#include <arch/machine/fpu.h>
|
|
|
|
#ifdef CONFIG_HAVE_FPU
|
|
|
|
/* Perform any actions required for the deletion of the given thread. */
|
|
void fpuThreadDelete(tcb_t *thread);
|
|
|
|
/* Handle an FPU exception. */
|
|
exception_t handleFPUFault(void);
|
|
|
|
void switchLocalFpuOwner(user_fpu_state_t *new_owner);
|
|
|
|
/* Switch the current owner of the FPU state on the core specified by 'cpu'. */
|
|
void switchFpuOwner(user_fpu_state_t *new_owner, word_t cpu);
|
|
|
|
/* Returns whether or not the passed thread is using the current active fpu state */
|
|
static inline bool_t nativeThreadUsingFPU(tcb_t *thread)
|
|
{
|
|
return &thread->tcbArch.tcbContext.fpuState ==
|
|
NODE_STATE_ON_CORE(ksActiveFPUState, thread->tcbAffinity);
|
|
}
|
|
|
|
static inline void FORCE_INLINE lazyFPURestore(tcb_t *thread)
|
|
{
|
|
if (unlikely(NODE_STATE(ksActiveFPUState))) {
|
|
/* If we have enabled/disabled the FPU too many times without
|
|
* someone else trying to use it, we assume it is no longer
|
|
* in use and switch out its state. */
|
|
if (unlikely(NODE_STATE(ksFPURestoresSinceSwitch) > CONFIG_FPU_MAX_RESTORES_SINCE_SWITCH)) {
|
|
switchLocalFpuOwner(NULL);
|
|
NODE_STATE(ksFPURestoresSinceSwitch) = 0;
|
|
} else {
|
|
if (likely(nativeThreadUsingFPU(thread))) {
|
|
/* We are using the FPU, make sure it is enabled */
|
|
enableFpu();
|
|
} else {
|
|
/* Someone is using the FPU and it might be enabled */
|
|
disableFpu();
|
|
}
|
|
NODE_STATE(ksFPURestoresSinceSwitch)++;
|
|
}
|
|
} else {
|
|
/* No-one (including us) is using the FPU, so we assume it
|
|
* is currently disabled */
|
|
}
|
|
}
|
|
|
|
#endif /* CONFIG_HAVE_FPU */
|
|
|