[4055e6f8] | 1 | /* irq_init.c |
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| 2 | * |
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| 3 | * This file contains the implementation of rtems initialization |
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| 4 | * related to interrupt handling. |
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| 5 | * |
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| 6 | * CopyRight (C) 2001 valette@crf.canon.fr |
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| 7 | * |
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| 8 | * The license and distribution terms for this file may be |
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| 9 | * found in the file LICENSE in this distribution or at |
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| 10 | * http://www.OARcorp.com/rtems/license.html. |
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| 11 | * |
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| 12 | * $Id$ |
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| 13 | */ |
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| 14 | #include <bsp/irq.h> |
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| 15 | #include <bsp.h> |
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| 16 | #include <libcpu/raw_exception.h> |
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| 17 | #include <bsp/8xx_immap.h> |
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| 18 | #include <bsp/commproc.h> |
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| 19 | |
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| 20 | extern unsigned int external_exception_vector_prolog_code_size; |
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| 21 | extern void external_exception_vector_prolog_code(); |
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| 22 | extern unsigned int decrementer_exception_vector_prolog_code_size; |
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| 23 | extern void decrementer_exception_vector_prolog_code(); |
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| 24 | |
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| 25 | volatile unsigned int ppc_cached_irq_mask; |
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| 26 | |
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| 27 | /* |
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| 28 | * default on/off function |
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| 29 | */ |
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| 30 | static void nop_func(){} |
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| 31 | /* |
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| 32 | * default isOn function |
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| 33 | */ |
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| 34 | static int not_connected() {return 0;} |
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| 35 | /* |
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| 36 | * default possible isOn function |
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| 37 | */ |
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| 38 | static int connected() {return 1;} |
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| 39 | |
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| 40 | static rtems_irq_connect_data rtemsIrq[BSP_IRQ_NUMBER]; |
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| 41 | static rtems_irq_global_settings initial_config; |
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| 42 | static rtems_irq_connect_data defaultIrq = { |
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| 43 | /* vectorIdex, hdl , on , off , isOn */ |
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| 44 | 0, nop_func , nop_func , nop_func , not_connected |
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| 45 | }; |
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| 46 | static rtems_irq_prio irqPrioTable[BSP_IRQ_NUMBER]={ |
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| 47 | /* |
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| 48 | * actual rpiorities for interrupt : |
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| 49 | * 0 means that only current interrupt is masked |
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| 50 | * 255 means all other interrupts are masked |
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| 51 | */ |
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| 52 | /* |
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| 53 | * SIU interrupts. |
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| 54 | */ |
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| 55 | 7,7, 6,6, 5,5, 4,4, 3,3, 2,2, 1,1, 0,0, |
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| 56 | /* |
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| 57 | * CPM Interrupts |
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| 58 | */ |
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| 59 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
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| 60 | 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, |
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| 61 | /* |
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| 62 | * Processor exceptions handled as interrupts |
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| 63 | */ |
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| 64 | 0 |
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| 65 | }; |
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| 66 | |
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| 67 | void BSP_SIU_irq_init() |
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| 68 | { |
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| 69 | /* |
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| 70 | * In theory we should initialize two registers at least : |
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| 71 | * SIMASK, SIEL. SIMASK is reset at 0 value meaning no interrupt. But |
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| 72 | * we should take care that a monitor may have restoreed to another value. |
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| 73 | * If someone find a reasonnable value for SIEL, AND THE NEED TO CHANGE IT |
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| 74 | * please feel free to add it here. |
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| 75 | */ |
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| 76 | ((volatile immap_t *)IMAP_ADDR)->im_siu_conf.sc_simask = 0; |
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| 77 | ((volatile immap_t *)IMAP_ADDR)->im_siu_conf.sc_sipend = 0xffff0000; |
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| 78 | ppc_cached_irq_mask = 0; |
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| 79 | ((volatile immap_t *)IMAP_ADDR)->im_siu_conf.sc_siel = ((volatile immap_t *)IMAP_ADDR)->im_siu_conf.sc_siel; |
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| 80 | } |
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| 81 | |
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| 82 | /* |
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| 83 | * Initialize CPM interrupt management |
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| 84 | */ |
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| 85 | void |
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| 86 | BSP_CPM_irq_init(void) |
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| 87 | { |
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| 88 | /* |
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| 89 | * Initialize the CPM interrupt controller. |
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| 90 | */ |
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| 91 | ((volatile immap_t *)IMAP_ADDR)->im_cpic.cpic_cicr = |
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| 92 | #ifdef mpc860 |
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| 93 | (CICR_SCD_SCC4 | CICR_SCC_SCC3 | CICR_SCB_SCC2 | CICR_SCA_SCC1) | |
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| 94 | #else |
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| 95 | (CICR_SCB_SCC2 | CICR_SCA_SCC1) | |
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| 96 | #endif |
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| 97 | ((BSP_CPM_INTERRUPT/2) << 13) | CICR_HP_MASK; |
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| 98 | ((volatile immap_t *)IMAP_ADDR)->im_cpic.cpic_cimr = 0; |
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| 99 | |
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| 100 | ((volatile immap_t *)IMAP_ADDR)->im_cpic.cpic_cicr |= CICR_IEN; |
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| 101 | } |
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| 102 | |
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| 103 | void BSP_rtems_irq_mng_init(unsigned cpuId) |
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| 104 | { |
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| 105 | rtems_raw_except_connect_data vectorDesc; |
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| 106 | int i; |
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| 107 | |
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| 108 | BSP_SIU_irq_init(); |
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| 109 | BSP_CPM_irq_init(); |
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| 110 | /* |
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| 111 | * Initialize Rtems management interrupt table |
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| 112 | */ |
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| 113 | /* |
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| 114 | * re-init the rtemsIrq table |
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| 115 | */ |
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| 116 | for (i = 0; i < BSP_IRQ_NUMBER; i++) { |
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| 117 | rtemsIrq[i] = defaultIrq; |
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| 118 | rtemsIrq[i].name = i; |
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| 119 | } |
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| 120 | /* |
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| 121 | * Init initial Interrupt management config |
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| 122 | */ |
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| 123 | initial_config.irqNb = BSP_IRQ_NUMBER; |
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| 124 | initial_config.defaultEntry = defaultIrq; |
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| 125 | initial_config.irqHdlTbl = rtemsIrq; |
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| 126 | initial_config.irqBase = BSP_ASM_IRQ_VECTOR_BASE; |
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| 127 | initial_config.irqPrioTbl = irqPrioTable; |
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| 128 | |
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| 129 | if (!BSP_rtems_irq_mngt_set(&initial_config)) { |
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| 130 | /* |
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| 131 | * put something here that will show the failure... |
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| 132 | */ |
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| 133 | BSP_panic("Unable to initialize RTEMS interrupt Management!!! System locked\n"); |
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| 134 | } |
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| 135 | |
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| 136 | /* |
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| 137 | * We must connect the raw irq handler for the two |
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| 138 | * expected interrupt sources : decrementer and external interrupts. |
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| 139 | */ |
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| 140 | vectorDesc.exceptIndex = ASM_DEC_VECTOR; |
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| 141 | vectorDesc.hdl.vector = ASM_DEC_VECTOR; |
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| 142 | vectorDesc.hdl.raw_hdl = decrementer_exception_vector_prolog_code; |
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| 143 | vectorDesc.hdl.raw_hdl_size = (unsigned) &decrementer_exception_vector_prolog_code_size; |
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| 144 | vectorDesc.on = nop_func; |
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| 145 | vectorDesc.off = nop_func; |
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| 146 | vectorDesc.isOn = connected; |
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| 147 | if (!mpc8xx_set_exception (&vectorDesc)) { |
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| 148 | BSP_panic("Unable to initialize RTEMS decrementer raw exception\n"); |
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| 149 | } |
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| 150 | vectorDesc.exceptIndex = ASM_EXT_VECTOR; |
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| 151 | vectorDesc.hdl.vector = ASM_EXT_VECTOR; |
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| 152 | vectorDesc.hdl.raw_hdl = external_exception_vector_prolog_code; |
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| 153 | vectorDesc.hdl.raw_hdl_size = (unsigned) &external_exception_vector_prolog_code_size; |
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| 154 | if (!mpc8xx_set_exception (&vectorDesc)) { |
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| 155 | BSP_panic("Unable to initialize RTEMS external raw exception\n"); |
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| 156 | } |
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| 157 | #ifdef TRACE_IRQ_INIT |
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| 158 | printk("RTEMS IRQ management is now operationnal\n"); |
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| 159 | #endif |
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| 160 | } |
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| 161 | |
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