| /* |
| (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); |
| } |
| } |