1 | /* |
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2 | * Clock Tick interrupt conexion code. |
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3 | * |
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4 | * COPYRIGHT (c) 1989-1997. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may in |
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8 | * the file LICENSE in this distribution or at |
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9 | * http://www.rtems.org/license/LICENSE. |
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10 | * |
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11 | * SS555 port sponsored by Defence Research and Development Canada - Suffield |
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12 | * Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca) |
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13 | * |
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14 | * Derived from c/src/lib/libbsp/powerpc/mbx8xx/clock/p_clock.c: |
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15 | * |
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16 | * Modified to support the MPC750. |
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17 | * Modifications Copyright (c) 1999 Eric Valette valette@crf.canon.fr |
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18 | */ |
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19 | |
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20 | #include <bsp.h> |
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21 | #include <bsp/irq.h> |
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22 | #include <rtems/bspIo.h> |
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23 | #include <mpc5xx.h> |
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24 | |
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25 | static rtems_irq_connect_data clockIrqData = { |
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26 | CPU_PERIODIC_TIMER, |
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27 | (rtems_irq_hdl)Clock_isr, |
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28 | NULL, |
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29 | (rtems_irq_enable)clockOn, |
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30 | (rtems_irq_disable)clockOff, |
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31 | (rtems_irq_is_enabled)clockIsOn |
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32 | }; |
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33 | |
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34 | int BSP_disconnect_clock_handler (void) |
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35 | { |
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36 | if (!BSP_get_current_rtems_irq_handler(&clockIrqData)) { |
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37 | printk("Unable to stop system clock\n"); |
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38 | rtems_fatal_error_occurred(1); |
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39 | } |
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40 | return BSP_remove_rtems_irq_handler (&clockIrqData); |
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41 | } |
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42 | |
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43 | int BSP_connect_clock_handler (rtems_irq_hdl hdl) |
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44 | { |
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45 | if (!BSP_get_current_rtems_irq_handler(&clockIrqData)) { |
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46 | printk("Unable to get system clock handler\n"); |
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47 | rtems_fatal_error_occurred(1); |
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48 | } |
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49 | if (!BSP_remove_rtems_irq_handler (&clockIrqData)) { |
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50 | printk("Unable to remove current system clock handler\n"); |
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51 | rtems_fatal_error_occurred(1); |
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52 | } |
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53 | /* |
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54 | * Reinit structure |
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55 | */ |
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56 | clockIrqData.name = CPU_PERIODIC_TIMER; |
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57 | clockIrqData.hdl = (rtems_irq_hdl) hdl; |
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58 | clockIrqData.on = (rtems_irq_enable)clockOn; |
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59 | clockIrqData.off = (rtems_irq_enable)clockOff; |
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60 | clockIrqData.isOn = (rtems_irq_is_enabled)clockIsOn; |
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61 | |
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62 | return BSP_install_rtems_irq_handler (&clockIrqData); |
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63 | } |
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