4.104.114.84.95
Last change
on this file since 5b6111b was
5b6111b,
checked in by Eric Norum <WENorum@…>, on 02/03/05 at 16:01:04
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Add support for interrupt controller allocation. This will provides a
mechanism for applications to find a free level/priority.
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-
Property mode set to
100644
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File size:
878 bytes
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Line | |
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1 | /* |
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2 | * Timer Init |
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3 | * |
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4 | * Use the last DMA timer (DTIM3) as the diagnostic timer. |
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5 | */ |
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6 | |
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7 | #include <rtems.h> |
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8 | #include <bsp.h> |
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9 | |
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10 | void |
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11 | Timer_initialize(void) |
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12 | { |
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13 | int preScaleDivisor = bsp_get_CPU_clock_speed() / 1000000; |
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14 | int div = MCF5282_TIMER_DTMR_CLK_DIV1; |
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15 | |
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16 | if (preScaleDivisor > 256) { |
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17 | preScaleDivisor /= 16; |
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18 | div = MCF5282_TIMER_DTMR_CLK_DIV16; |
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19 | } |
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20 | MCF5282_TIMER3_DTMR = 0; |
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21 | MCF5282_TIMER3_DTMR = MCF5282_TIMER_DTMR_PS(preScaleDivisor - 1) | div | |
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22 | MCF5282_TIMER_DTMR_RST; |
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23 | } |
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24 | |
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25 | /* |
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26 | * Return timer value in microsecond units |
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27 | */ |
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28 | int |
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29 | Read_timer(void) |
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30 | { |
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31 | return MCF5282_TIMER3_DTCN; |
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32 | } |
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33 | |
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34 | /* |
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35 | * Empty function call used in loops to measure basic cost of looping |
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36 | * in Timing Test Suite. |
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37 | */ |
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38 | rtems_status_code |
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39 | Empty_function(void) |
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40 | { |
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41 | return RTEMS_SUCCESSFUL; |
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42 | } |
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43 | |
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44 | void |
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45 | Set_find_average_overhead(rtems_boolean find_flag) |
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46 | { |
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47 | } |
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