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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [machine/] [spu/] [spu_timer_slih_reg.c] - Rev 301
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/* (C) Copyright IBM Corp. 2008 All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of IBM nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* Services for SLIH registration. */ #include <spu_intrinsics.h> #include <spu_timer.h> #define SPU_EVENT_ID(_mask) \ (spu_extract(spu_cntlz(spu_promote(_mask, 0)), 0)) typedef unsigned (*spu_slih_t) (unsigned); extern spu_slih_t __spu_slih_handlers[]; /* This function is called whenever an event occurs for which no second level event handler was registered. The default event handler does nothing and zeros the most significant event bit indicating that the event was processed (when in reality, it was discarded). */ unsigned __spu_default_slih (unsigned events) { unsigned int mse; mse = 0x80000000 >> SPU_EVENT_ID (events); events &= ~mse; return (events); } /* Registers a SPU second level interrupt handler for the events specified by mask. The event mask consists of a set of bits corresponding to the event status bits (see channel 0 description). A mask containing multiple 1 bits will set the second level event handler for each of the events. */ void spu_slih_register (unsigned mask, spu_slih_t func) { unsigned int id; while (mask) { id = SPU_EVENT_ID (mask); __spu_slih_handlers[id] = (func) ? func : __spu_default_slih; mask &= ~(0x80000000 >> id); } }
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