73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
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/*
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(C) Copyright IBM Corp. 2008
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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 notice,
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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 IBM nor the names of its contributors may be
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used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/* Services for SLIH registration. */
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#include <spu_intrinsics.h>
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#include <spu_timer.h>
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#define SPU_EVENT_ID(_mask) \
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(spu_extract(spu_cntlz(spu_promote(_mask, 0)), 0))
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typedef unsigned (*spu_slih_t) (unsigned);
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extern spu_slih_t __spu_slih_handlers[];
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/* This function is called whenever an event occurs for which no second level
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event handler was registered. The default event handler does nothing and
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zeros the most significant event bit indicating that the event was processed
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(when in reality, it was discarded). */
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unsigned
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__spu_default_slih (unsigned events)
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{
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unsigned int mse;
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mse = 0x80000000 >> SPU_EVENT_ID (events);
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events &= ~mse;
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return (events);
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}
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/* Registers a SPU second level interrupt handler for the events specified by
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mask. The event mask consists of a set of bits corresponding to the event
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status bits (see channel 0 description). A mask containing multiple 1 bits
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will set the second level event handler for each of the events. */
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void
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spu_slih_register (unsigned mask, spu_slih_t func)
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{
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unsigned int id;
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while (mask)
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{
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id = SPU_EVENT_ID (mask);
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__spu_slih_handlers[id] = (func) ? func : __spu_default_slih;
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mask &= ~(0x80000000 >> id);
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}
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}
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