4.104.114.95
Last change
on this file since 0ccb2bb was
0ccb2bb,
checked in by Joel Sherrill <joel.sherrill@…>, on 08/31/08 at 15:54:43
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2008-08-31 Joel Sherrill <joel.sherrill@…>
- timer/timer.c, timer/timerisr.S: Rename timer driver methods to
follow RTEMS programming conventions.
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-
Property mode set to
100644
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File size:
725 bytes
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Line | |
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1 | /* |
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2 | * Handle 68302 TIMER2 interrupts. |
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3 | * |
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4 | * All code in this routine is pure overhead which can perturb the |
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5 | * accuracy of RTEMS' timing test suite. |
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6 | * |
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7 | * See also: benchmark_timerread() |
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8 | * |
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9 | * To reduce overhead this is best to be the "rawest" hardware interupt |
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10 | * handler you can write. This should be the only interrupt which can |
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11 | * occur during the measured time period. |
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12 | * |
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13 | * An external counter, Timer_interrupts, is incremented. |
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14 | * |
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15 | * $Id$ |
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16 | */ |
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17 | |
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18 | #include <rtems/asm.h> |
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19 | |
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20 | BEGIN_CODE |
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21 | PUBLIC(timerisr) |
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22 | SYM(timerisr): |
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23 | move.w #0x0040,SYM(m302)+2072 | clear interrupt in-service bit |
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24 | move.b #3,SYM(m302)+2137 | clear timer interrupt event register |
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25 | addq.l #1,SYM(Timer_interrupts) | increment timer value |
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26 | rte |
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27 | END_CODE |
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28 | END |
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