[16a8616] | 1 | /*===============================================================*\ |
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| 2 | | Project: RTEMS virtex BSP | |
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| 3 | +-----------------------------------------------------------------+ |
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| 4 | | Partially based on the code references which are named below. | |
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| 5 | | Adaptions, modifications, enhancements and any recent parts of | |
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| 6 | | the code are: | |
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| 7 | | Copyright (c) 2007 | |
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| 8 | | Embedded Brains GmbH | |
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| 9 | | Obere Lagerstr. 30 | |
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| 10 | | D-82178 Puchheim | |
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| 11 | | Germany | |
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| 12 | | rtems@embedded-brains.de | |
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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 | | | |
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[c499856] | 17 | | http://www.rtems.org/license/LICENSE. | |
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[16a8616] | 18 | | | |
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| 19 | +-----------------------------------------------------------------+ |
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| 20 | | this file contains the irq controller handler | |
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| 21 | \*===============================================================*/ |
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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 <rtems/bspIo.h> |
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| 26 | #include <rtems/powerpc/powerpc.h> |
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| 27 | #include <bsp/vectors.h> |
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| 28 | |
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| 29 | static rtems_irq_connect_data rtemsIrqTbl[BSP_IRQ_NUMBER]; |
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| 30 | rtems_irq_connect_data *BSP_rtems_irq_tbl; |
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| 31 | rtems_irq_global_settings* BSP_rtems_irq_config; |
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| 32 | |
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| 33 | /*********************************************************** |
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| 34 | * dummy functions for on/off/isOn calls |
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| 35 | * these functions just do nothing fulfill the semantic |
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| 36 | * requirements to enable/disable a certain interrupt or exception |
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| 37 | */ |
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[655bd39] | 38 | static void BSP_irq_nop_func(const rtems_irq_connect_data *unused) |
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[16a8616] | 39 | { |
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| 40 | /* |
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| 41 | * nothing to do |
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| 42 | */ |
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| 43 | } |
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| 44 | |
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[655bd39] | 45 | static void BSP_irq_nop_hdl(void *hdl) |
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[16a8616] | 46 | { |
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| 47 | /* |
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| 48 | * nothing to do |
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| 49 | */ |
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| 50 | } |
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| 51 | |
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[655bd39] | 52 | static int BSP_irq_isOn_func(const rtems_irq_connect_data *unused) |
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[16a8616] | 53 | { |
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| 54 | /* |
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| 55 | * nothing to do |
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| 56 | */ |
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| 57 | return 0; |
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| 58 | } |
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| 59 | |
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| 60 | /*********************************************************** |
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| 61 | * interrupt handler and its enable/disable functions |
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| 62 | ***********************************************************/ |
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| 63 | |
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| 64 | /*********************************************************** |
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| 65 | * functions to enable/disable/query external/critical interrupts |
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| 66 | */ |
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[655bd39] | 67 | void BSP_irqexc_on_fnc(const rtems_irq_connect_data *conn_data) |
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[16a8616] | 68 | { |
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| 69 | uint32_t msr_value; |
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| 70 | /* |
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| 71 | * get current MSR value |
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| 72 | */ |
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| 73 | _CPU_MSR_GET(msr_value); |
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| 74 | |
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| 75 | msr_value |= PPC_MSR_EE; |
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| 76 | _CPU_MSR_SET(msr_value); |
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| 77 | } |
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| 78 | |
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[655bd39] | 79 | void BSP_irqexc_off_fnc(const rtems_irq_connect_data *unused) |
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[16a8616] | 80 | { |
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| 81 | uint32_t msr_value; |
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| 82 | /* |
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| 83 | * get current MSR value |
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| 84 | */ |
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| 85 | _CPU_MSR_GET(msr_value); |
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| 86 | |
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| 87 | msr_value &= ~PPC_MSR_EE; |
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| 88 | _CPU_MSR_SET(msr_value); |
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| 89 | } |
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| 90 | |
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[655bd39] | 91 | SPR_RW(BOOKE_TSR) |
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| 92 | |
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[967278f] | 93 | static int C_dispatch_dec_handler (BSP_Exception_frame *frame, unsigned int excNum) |
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[655bd39] | 94 | { |
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| 95 | /* Acknowledge the interrupt */ |
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| 96 | _write_BOOKE_TSR( BOOKE_TSR_DIS ); |
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| 97 | |
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| 98 | /* Handle the interrupt */ |
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| 99 | BSP_rtems_irq_tbl[BSP_DEC].hdl(BSP_rtems_irq_tbl[BSP_DEC].handle); |
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| 100 | |
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| 101 | return 0; |
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| 102 | } |
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| 103 | |
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| 104 | |
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[16a8616] | 105 | /*********************************************************** |
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| 106 | * High level IRQ handler called from shared_raw_irq_code_entry |
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| 107 | */ |
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[967278f] | 108 | static int C_dispatch_irq_handler (BSP_Exception_frame *frame, unsigned int excNum) |
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[16a8616] | 109 | { |
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| 110 | /* |
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| 111 | * Handle interrupt |
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| 112 | */ |
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| 113 | switch(excNum) { |
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| 114 | case ASM_EXT_VECTOR: |
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| 115 | BSP_rtems_irq_tbl[BSP_EXT].hdl(BSP_rtems_irq_tbl[BSP_EXT].handle); |
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| 116 | break; |
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[655bd39] | 117 | #if 0 /* Dealt with by C_dispatch_dec_handler(), above */ |
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[16a8616] | 118 | case ASM_BOOKE_DEC_VECTOR: |
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[655bd39] | 119 | _write_BOOKE_TSR( BOOKE_TSR_DIS ); |
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| 120 | BSP_rtems_irq_tbl[BSP_DEC].hdl(BSP_rtems_irq_tbl[BSP_DEC].handle); |
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[16a8616] | 121 | break; |
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[655bd39] | 122 | #endif |
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[16a8616] | 123 | #if 0 /* Critical interrupts not yet supported */ |
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| 124 | case ASM_BOOKE_CRIT_VECTOR: |
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| 125 | BSP_rtems_irq_tbl[BSP_CRIT].hdl(BSP_rtems_irq_tbl[BSP_CRIT].handle); |
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| 126 | break; |
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| 127 | #endif |
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| 128 | } |
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| 129 | |
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| 130 | return 0; |
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| 131 | } |
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| 132 | |
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| 133 | /*********************************************************** |
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| 134 | * functions to set/get/remove interrupt handlers |
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| 135 | ***********************************************************/ |
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| 136 | int BSP_install_rtems_irq_handler (const rtems_irq_connect_data* irq) |
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| 137 | { |
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| 138 | rtems_interrupt_level level; |
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| 139 | |
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| 140 | /* |
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| 141 | * check for valid irq name |
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| 142 | * if invalid, print error and return 0 |
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| 143 | */ |
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| 144 | if (!BSP_IS_VALID_IRQ(irq->name)) { |
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| 145 | printk("Invalid interrupt vector %d\n",irq->name); |
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| 146 | return 0; |
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| 147 | } |
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| 148 | |
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| 149 | /* |
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| 150 | * disable interrupts |
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| 151 | */ |
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| 152 | rtems_interrupt_disable(level); |
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| 153 | |
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| 154 | /* |
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| 155 | * check, that default handler is installed now |
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| 156 | */ |
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| 157 | if (rtemsIrqTbl[irq->name].hdl != BSP_rtems_irq_config->defaultEntry.hdl) { |
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| 158 | rtems_interrupt_enable(level); |
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| 159 | printk("IRQ vector %d already connected\n",irq->name); |
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| 160 | return 0; |
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| 161 | } |
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| 162 | |
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| 163 | /* |
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| 164 | * store new handler data |
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| 165 | */ |
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| 166 | rtemsIrqTbl[irq->name] = *irq; |
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| 167 | |
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| 168 | /* |
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| 169 | * call "on" function to enable interrupt at device |
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| 170 | */ |
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| 171 | irq->on(irq); |
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| 172 | |
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| 173 | /* |
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| 174 | * reenable interrupts |
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| 175 | */ |
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| 176 | rtems_interrupt_enable(level); |
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| 177 | |
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| 178 | return 1; |
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| 179 | } |
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| 180 | |
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| 181 | int BSP_get_current_rtems_irq_handler (rtems_irq_connect_data* irq) |
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| 182 | { |
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| 183 | rtems_interrupt_level level; |
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| 184 | |
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| 185 | /* |
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| 186 | * check for valid IRQ name |
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| 187 | */ |
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| 188 | if (!BSP_IS_VALID_IRQ(irq->name)) { |
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| 189 | return 0; |
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| 190 | } |
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| 191 | rtems_interrupt_disable(level); |
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| 192 | |
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| 193 | /* |
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| 194 | * return current IRQ entry |
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| 195 | */ |
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| 196 | *irq = rtemsIrqTbl[irq->name]; |
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| 197 | rtems_interrupt_enable(level); |
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| 198 | return 1; |
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| 199 | } |
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| 200 | |
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| 201 | int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data* irq) |
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| 202 | { |
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| 203 | rtems_interrupt_level level; |
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| 204 | |
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| 205 | /* |
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| 206 | * check for valid IRQ name |
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| 207 | */ |
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| 208 | if (!BSP_IS_VALID_IRQ(irq->name)) { |
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| 209 | return 0; |
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| 210 | } |
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| 211 | rtems_interrupt_disable(level); |
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| 212 | |
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| 213 | /* |
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| 214 | * check, that specified handler is really connected now |
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| 215 | */ |
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| 216 | if (rtemsIrqTbl[irq->name].hdl != irq->hdl) { |
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| 217 | rtems_interrupt_enable(level); |
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| 218 | return 0; |
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| 219 | } |
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| 220 | |
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| 221 | /* |
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| 222 | * disable interrupt at source |
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| 223 | */ |
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| 224 | irq->off(irq); |
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| 225 | |
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| 226 | /* |
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| 227 | * restore default interrupt handler |
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| 228 | */ |
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| 229 | rtemsIrqTbl[irq->name] = BSP_rtems_irq_config->defaultEntry; |
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| 230 | |
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| 231 | /* |
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| 232 | * reenable interrupts |
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| 233 | */ |
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| 234 | rtems_interrupt_enable(level); |
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| 235 | |
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| 236 | return 1; |
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| 237 | } |
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| 238 | |
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| 239 | /*********************************************************** |
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| 240 | * functions to set/get the basic interrupt management setup |
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| 241 | ***********************************************************/ |
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| 242 | /* |
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| 243 | * (Re) get info on current RTEMS interrupt management. |
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| 244 | */ |
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| 245 | int BSP_rtems_irq_mngt_get(rtems_irq_global_settings** ret_ptr) |
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| 246 | { |
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| 247 | *ret_ptr = BSP_rtems_irq_config; |
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| 248 | return 0; |
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| 249 | } |
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| 250 | |
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| 251 | |
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| 252 | /* |
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| 253 | * set management stuff |
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| 254 | */ |
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| 255 | int BSP_rtems_irq_mngt_set(rtems_irq_global_settings* config) |
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| 256 | { |
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| 257 | int i; |
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| 258 | rtems_interrupt_level level; |
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| 259 | |
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| 260 | rtems_interrupt_disable(level); |
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| 261 | |
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| 262 | /* |
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| 263 | * store given configuration |
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| 264 | */ |
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| 265 | BSP_rtems_irq_config = config; |
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| 266 | BSP_rtems_irq_tbl = BSP_rtems_irq_config->irqHdlTbl; |
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| 267 | |
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| 268 | /* |
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| 269 | * store any irq-like processor exceptions |
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| 270 | */ |
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| 271 | for (i = BSP_PROCESSOR_IRQ_LOWEST_OFFSET; |
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| 272 | i < BSP_PROCESSOR_IRQ_MAX_OFFSET; |
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| 273 | i++) { |
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| 274 | if (BSP_rtems_irq_tbl[i].hdl != config->defaultEntry.hdl) { |
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| 275 | if (BSP_rtems_irq_tbl[i].on != NULL) { |
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| 276 | BSP_rtems_irq_tbl[i].on |
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| 277 | (&(BSP_rtems_irq_tbl[i])); |
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| 278 | } |
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| 279 | } |
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| 280 | else { |
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| 281 | if (BSP_rtems_irq_tbl[i].off != NULL) { |
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| 282 | BSP_rtems_irq_tbl[i].off |
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| 283 | (&(BSP_rtems_irq_tbl[i])); |
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| 284 | } |
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| 285 | } |
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| 286 | } |
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| 287 | rtems_interrupt_enable(level); |
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| 288 | return 1; |
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| 289 | } |
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| 290 | |
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| 291 | /* |
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| 292 | * dummy for an empty IRQ handler entry |
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| 293 | */ |
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| 294 | static rtems_irq_connect_data emptyIrq = { |
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[655bd39] | 295 | 0, /* IRQ Name */ |
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[16a8616] | 296 | BSP_irq_nop_hdl, /* handler function */ |
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| 297 | NULL, /* handle passed to handler */ |
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| 298 | BSP_irq_nop_func, /* on function */ |
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| 299 | BSP_irq_nop_func, /* off function */ |
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| 300 | BSP_irq_isOn_func /* isOn function */ |
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| 301 | }; |
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| 302 | |
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| 303 | static rtems_irq_global_settings initialConfig = { |
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[655bd39] | 304 | BSP_IRQ_NUMBER, /* IRQ number */ |
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| 305 | { 0, /* IRQ Name */ |
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[16a8616] | 306 | BSP_irq_nop_hdl, /* handler function */ |
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| 307 | NULL, /* handle passed to handler */ |
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| 308 | BSP_irq_nop_func, /* on function */ |
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| 309 | BSP_irq_nop_func, /* off function */ |
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| 310 | BSP_irq_isOn_func /* isOn function */ |
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| 311 | }, /* emptyIrq */ |
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| 312 | rtemsIrqTbl, /* irqHdlTbl */ |
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| 313 | 0, /* irqBase */ |
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| 314 | NULL /* irqPrioTbl */ |
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| 315 | }; |
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| 316 | |
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| 317 | void BSP_rtems_irq_mngt_init(unsigned cpuId) |
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| 318 | { |
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| 319 | int i; |
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| 320 | |
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| 321 | /* |
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| 322 | * connect all exception vectors needed |
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| 323 | */ |
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| 324 | ppc_exc_set_handler(ASM_EXT_VECTOR, C_dispatch_irq_handler); |
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[655bd39] | 325 | ppc_exc_set_handler(ASM_BOOKE_DEC_VECTOR, C_dispatch_dec_handler); |
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[16a8616] | 326 | |
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| 327 | /* |
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| 328 | * setup interrupt handlers table |
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| 329 | */ |
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| 330 | for (i = 0; |
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| 331 | i < BSP_IRQ_NUMBER; |
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| 332 | i++) { |
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| 333 | rtemsIrqTbl[i] = emptyIrq; |
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| 334 | rtemsIrqTbl[i].name = i; |
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| 335 | } |
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| 336 | |
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| 337 | /* |
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| 338 | * initialize interrupt management |
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| 339 | */ |
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| 340 | if (!BSP_rtems_irq_mngt_set(&initialConfig)) { |
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[1c193a2] | 341 | rtems_panic("Unable to initialize RTEMS interrupt Management!!! System locked\n"); |
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[16a8616] | 342 | } |
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| 343 | } |
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