1 | /* |
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2 | (C) Copyright IBM Corp. 2008 |
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3 | |
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4 | All rights reserved. |
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5 | |
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6 | Redistribution and use in source and binary forms, with or without |
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7 | modification, are permitted provided that the following conditions are met: |
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8 | |
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9 | * Redistributions of source code must retain the above copyright notice, |
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10 | this list of conditions and the following disclaimer. |
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11 | * Redistributions in binary form must reproduce the above copyright |
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12 | notice, this list of conditions and the following disclaimer in the |
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13 | documentation and/or other materials provided with the distribution. |
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14 | * Neither the name of IBM nor the names of its contributors may be |
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15 | used to endorse or promote products derived from this software without |
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16 | specific prior written permission. |
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17 | |
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18 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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19 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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20 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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21 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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22 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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23 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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24 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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25 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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26 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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27 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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28 | POSSIBILITY OF SUCH DAMAGE. |
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29 | */ |
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30 | |
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31 | |
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32 | /* Services for SLIH registration. */ |
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33 | #include <spu_intrinsics.h> |
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34 | #include <spu_timer.h> |
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35 | |
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36 | #define SPU_EVENT_ID(_mask) \ |
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37 | (spu_extract(spu_cntlz(spu_promote(_mask, 0)), 0)) |
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38 | typedef unsigned (*spu_slih_t) (unsigned); |
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39 | |
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40 | extern spu_slih_t __spu_slih_handlers[]; |
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41 | |
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42 | /* This function is called whenever an event occurs for which no second level |
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43 | event handler was registered. The default event handler does nothing and |
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44 | zeros the most significant event bit indicating that the event was processed |
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45 | (when in reality, it was discarded). */ |
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46 | unsigned |
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47 | __spu_default_slih (unsigned events) |
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48 | { |
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49 | unsigned int mse; |
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50 | |
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51 | mse = 0x80000000 >> SPU_EVENT_ID (events); |
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52 | events &= ~mse; |
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53 | |
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54 | return (events); |
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55 | } |
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56 | |
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57 | /* Registers a SPU second level interrupt handler for the events specified by |
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58 | mask. The event mask consists of a set of bits corresponding to the event |
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59 | status bits (see channel 0 description). A mask containing multiple 1 bits |
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60 | will set the second level event handler for each of the events. */ |
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61 | void |
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62 | spu_slih_register (unsigned mask, spu_slih_t func) |
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63 | { |
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64 | unsigned int id; |
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65 | |
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66 | while (mask) |
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67 | { |
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68 | id = SPU_EVENT_ID (mask); |
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69 | __spu_slih_handlers[id] = (func) ? func : __spu_default_slih; |
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70 | mask &= ~(0x80000000 >> id); |
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71 | } |
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72 | } |
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