[270ce1ff] | 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) 1999 valette@crf.canon.fr |
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| 7 | * |
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| 8 | * Enhanced by Jay Kulpinski <jskulpin@eng01.gdds.com> |
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| 9 | * to make it valid for MVME2300 Motorola boards. |
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| 10 | * |
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| 11 | * Till Straumann <strauman@slac.stanford.edu>, 12/20/2001: |
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| 12 | * Use the new interface to openpic_init |
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| 13 | * |
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| 14 | * The license and distribution terms for this file may be |
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| 15 | * found in the file LICENSE in this distribution or at |
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| 16 | * http://www.rtems.com/license/LICENSE. |
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| 17 | * |
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| 18 | * irq_init.c,v 1.6.2.5 2003/09/04 18:45:20 joel Exp |
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| 19 | */ |
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| 20 | |
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| 21 | #include <libcpu/io.h> |
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| 22 | #include <libcpu/spr.h> |
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| 23 | #include <bsp/irq.h> |
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| 24 | #include <bsp.h> |
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| 25 | #include <libcpu/raw_exception.h> |
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| 26 | #include <rtems/bspIo.h> |
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| 27 | #if 0 |
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| 28 | #include <bsp/pci.h> |
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| 29 | #include <bsp/residual.h> |
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| 30 | #include <bsp/openpic.h> |
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| 31 | #include <bsp/motorola.h> |
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| 32 | #endif |
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| 33 | |
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| 34 | |
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| 35 | /* |
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| 36 | #define SHOW_ISA_PCI_BRIDGE_SETTINGS |
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| 37 | */ |
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| 38 | |
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| 39 | typedef struct { |
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| 40 | unsigned char bus; /* few chance the PCI/ISA bridge is not on first bus but ... */ |
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| 41 | unsigned char device; |
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| 42 | unsigned char function; |
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| 43 | } pci_isa_bridge_device; |
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| 44 | |
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| 45 | pci_isa_bridge_device* via_82c586 = 0; |
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| 46 | |
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| 47 | extern unsigned int external_exception_vector_prolog_code_size[]; |
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| 48 | extern void external_exception_vector_prolog_code(); |
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| 49 | extern unsigned int decrementer_exception_vector_prolog_code_size[]; |
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| 50 | extern void decrementer_exception_vector_prolog_code(); |
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| 51 | |
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| 52 | /* |
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| 53 | * default on/off function |
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| 54 | */ |
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| 55 | static void nop_func(){} |
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| 56 | /* |
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| 57 | * default isOn function |
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| 58 | */ |
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| 59 | static int not_connected() {return 0;} |
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| 60 | /* |
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| 61 | * default possible isOn function |
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| 62 | */ |
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| 63 | static int connected() {return 1;} |
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| 64 | |
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| 65 | static rtems_irq_connect_data rtemsIrq[BSP_IRQ_NUMBER]; |
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| 66 | static rtems_irq_global_settings initial_config; |
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| 67 | static rtems_irq_connect_data defaultIrq = { |
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[6ef01b4] | 68 | /* vectorIdex, hdl , handle , on , off , isOn */ |
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| 69 | 0, nop_func , NULL , nop_func , nop_func , not_connected |
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[270ce1ff] | 70 | }; |
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| 71 | static rtems_irq_prio irqPrioTable[BSP_IRQ_NUMBER]={ |
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| 72 | /* |
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| 73 | * actual rpiorities for interrupt : |
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| 74 | * 0 means that only current interrupt is masked |
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| 75 | * 255 means all other interrupts are masked |
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| 76 | */ |
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| 77 | /* |
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| 78 | * ISA interrupts. |
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| 79 | * The second entry has a priority of 255 because |
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| 80 | * it is the slave pic entry and is should always remain |
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| 81 | * unmasked. |
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| 82 | */ |
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| 83 | 0,0, |
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| 84 | 255, |
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| 85 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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| 86 | /* |
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| 87 | * PCI Interrupts |
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| 88 | */ |
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| 89 | 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, /* for raven prio 0 means unactive... */ |
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| 90 | /* |
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| 91 | * Processor exceptions handled as interrupts |
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| 92 | */ |
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| 93 | 0 |
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| 94 | }; |
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| 95 | |
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| 96 | void VIA_isa_bridge_interrupts_setup(void) |
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| 97 | { |
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| 98 | printk("VIA_isa_bridge_interrupts_setup - Shouldn't get here!\n"); |
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| 99 | return; |
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| 100 | } |
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| 101 | |
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| 102 | /* |
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| 103 | * This code assumes the exceptions management setup has already |
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| 104 | * been done. We just need to replace the exceptions that will |
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| 105 | * be handled like interrupt. On mcp750/mpc750 and many PPC processors |
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| 106 | * this means the decrementer exception and the external exception. |
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| 107 | */ |
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| 108 | void BSP_rtems_irq_mng_init(unsigned cpuId) |
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| 109 | { |
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| 110 | rtems_raw_except_connect_data vectorDesc; |
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| 111 | int i; |
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| 112 | |
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| 113 | /* |
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| 114 | * First initialize the Interrupt management hardware |
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| 115 | */ |
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| 116 | |
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| 117 | /* |
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| 118 | * Initialize Rtems management interrupt table |
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| 119 | */ |
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| 120 | /* |
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| 121 | * re-init the rtemsIrq table |
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| 122 | */ |
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| 123 | for (i = 0; i < BSP_IRQ_NUMBER; i++) { |
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| 124 | rtemsIrq[i] = defaultIrq; |
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| 125 | rtemsIrq[i].name = i; |
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| 126 | } |
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| 127 | /* |
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| 128 | * Init initial Interrupt management config |
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| 129 | */ |
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| 130 | initial_config.irqNb = BSP_IRQ_NUMBER; |
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| 131 | initial_config.defaultEntry = defaultIrq; |
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| 132 | initial_config.irqHdlTbl = rtemsIrq; |
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| 133 | initial_config.irqBase = BSP_ASM_IRQ_VECTOR_BASE; |
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| 134 | initial_config.irqPrioTbl = irqPrioTable; |
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| 135 | |
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| 136 | if (!BSP_rtems_irq_mngt_set(&initial_config)) { |
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| 137 | /* |
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| 138 | * put something here that will show the failure... |
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| 139 | */ |
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| 140 | BSP_panic("Unable to initialize RTEMS interrupt Management!!! System locked\n"); |
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| 141 | } |
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| 142 | |
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| 143 | /* |
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| 144 | * We must connect the raw irq handler for the two |
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| 145 | * expected interrupt sources : decrementer and external interrupts. |
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| 146 | */ |
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| 147 | vectorDesc.exceptIndex = ASM_DEC_VECTOR; |
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| 148 | vectorDesc.hdl.vector = ASM_DEC_VECTOR; |
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| 149 | vectorDesc.hdl.raw_hdl = decrementer_exception_vector_prolog_code; |
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| 150 | vectorDesc.hdl.raw_hdl_size = (unsigned) decrementer_exception_vector_prolog_code_size; |
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| 151 | vectorDesc.on = nop_func; |
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| 152 | vectorDesc.off = nop_func; |
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| 153 | vectorDesc.isOn = connected; |
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| 154 | if (!mpc60x_set_exception (&vectorDesc)) { |
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| 155 | BSP_panic("Unable to initialize RTEMS decrementer raw exception\n"); |
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| 156 | } |
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| 157 | vectorDesc.exceptIndex = ASM_EXT_VECTOR; |
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| 158 | vectorDesc.hdl.vector = ASM_EXT_VECTOR; |
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| 159 | vectorDesc.hdl.raw_hdl = external_exception_vector_prolog_code; |
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| 160 | vectorDesc.hdl.raw_hdl_size = (unsigned) external_exception_vector_prolog_code_size; |
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| 161 | if (!mpc60x_set_exception (&vectorDesc)) { |
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| 162 | BSP_panic("Unable to initialize RTEMS external raw exception\n"); |
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| 163 | } |
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| 164 | #ifdef TRACE_IRQ_INIT |
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| 165 | printk("RTEMS IRQ management is now operationnal\n"); |
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| 166 | #endif |
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| 167 | } |
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| 168 | |
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