103 lines
3.8 KiB
C
103 lines
3.8 KiB
C
/*
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Copyright (c) 2012, Broadcom Europe Ltd
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*=============================================================================
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VideoCore OS Abstraction Layer - legacy (Nucleus) IRQ support
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=============================================================================*/
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#ifndef VCOS_LEGACY_ISR_H
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#define VCOS_LEGACY_ISR_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "vcos_types.h"
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#include "pthreads/vcos_platform.h"
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/** \file vcos_legacy_isr.h
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*
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* API for dispatching interrupts the Nucleus way, via a LISR and HISR.
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* New code should use the single-dispatch scheme - the LISR/HISR
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* distinction is not necessary.
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*
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* Under ThreadX, a HISR is implemented as a high-priority thread which
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* waits on a counting semaphore to call the HISR function. Although this
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* provides a good approximation to the Nucleus semantics, it is potentially
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* slow if all you are trying to do is to wake a thread from LISR context.
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*/
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/** Register a LISR. This is identical to the NU_Register_LISR API.
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*/
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VCOS_INLINE_DECL
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VCOS_STATUS_T vcos_register_legacy_lisr(VCOS_UNSIGNED vecnum,
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void (*lisr)(VCOS_INT),
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void (**old_lisr)(VCOS_INT));
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VCOS_INLINE_DECL
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VCOS_STATUS_T vcos_legacy_hisr_create(VCOS_HISR_T *hisr, const char *name,
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void (*entry)(void),
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VCOS_UNSIGNED pri,
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void *stack, VCOS_UNSIGNED stack_size);
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/** Activate a HISR. On an OS which has no distinction between a HISR and LISR,
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* this may use some kind of emulation, which could well be less efficient than
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* a normal ISR.`
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*
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* @param hisr HISR to activate.
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*/
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VCOS_INLINE_DECL
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void vcos_legacy_hisr_activate(VCOS_HISR_T *hisr);
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/** Delete a HISR.
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*
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* @param hisr HISR to delete.
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*/
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VCOS_INLINE_DECL
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void vcos_legacy_hisr_delete(VCOS_HISR_T *hisr);
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/** Are we in a legacy LISR?
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*
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* @return On Nucleus, non-zero if in a LISR. On other platforms, non-zero if
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* in an interrupt.
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*/
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VCOS_INLINE_DECL
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int vcos_in_legacy_lisr(void);
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/** Is the current thread actually a fake HISR thread? Only implemented
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* on platforms that fake up HISRs.
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*/
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#ifndef VCOS_LISRS_NEED_HISRS
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VCOSPRE_ int VCOSPOST_ vcos_current_thread_is_fake_hisr_thread(VCOS_HISR_T *);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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