1 | /* |
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2 | * Philps LPC22XX Interrupt handler |
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3 | * |
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4 | * Copyright (c) 2010 embedded brains GmbH. |
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5 | * |
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6 | * Copyright (c) 2006 by Ray<rayx.cn@gmail.com> to support LPC ARM |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #include <bsp.h> |
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15 | #include <bsp/irq.h> |
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16 | #include <bsp/irq-generic.h> |
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17 | |
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18 | #include <lpc22xx.h> |
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19 | |
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20 | void bsp_interrupt_dispatch(void) |
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21 | { |
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22 | rtems_vector_number vector = 31 - __builtin_clz(VICIRQStatus); |
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23 | |
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24 | bsp_interrupt_handler_dispatch(vector); |
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25 | |
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26 | VICVectAddr = 0; |
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27 | } |
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28 | |
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29 | rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector) |
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30 | { |
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31 | VICIntEnable |= 1 << vector; |
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32 | |
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33 | return RTEMS_SUCCESSFUL; |
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34 | } |
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35 | |
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36 | rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector) |
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37 | { |
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38 | VICIntEnClr = 1 << vector; |
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39 | |
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40 | return RTEMS_SUCCESSFUL; |
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41 | } |
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42 | |
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43 | rtems_status_code bsp_interrupt_facility_initialize(void) |
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44 | { |
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45 | volatile uint32_t *ctrl = (volatile uint32_t *) VICVectCntlBase; |
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46 | size_t i = 0; |
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47 | |
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48 | /* Disable all interrupts */ |
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49 | VICIntEnClr = 0xffffffff; |
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50 | |
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51 | /* Use IRQ category */ |
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52 | VICIntSelect = 0; |
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53 | |
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54 | /* Enable access in USER mode */ |
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55 | VICProtection = 0; |
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56 | |
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57 | for (i = 0; i < 16; ++i) { |
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58 | /* Disable vector mode */ |
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59 | ctrl [i] = 0; |
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60 | |
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61 | /* Acknowledge interrupts for all priorities */ |
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62 | VICVectAddr = 0; |
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63 | } |
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64 | |
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65 | /* Acknowledge interrupts for all priorities */ |
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66 | VICVectAddr = 0; |
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67 | |
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68 | /* Install the IRQ exception handler */ |
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69 | _CPU_ISR_install_vector(ARM_EXCEPTION_IRQ, arm_exc_interrupt, NULL); |
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70 | |
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71 | return RTEMS_SUCCESSFUL; |
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72 | } |
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