[41c9282] | 1 | /* |
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| 2 | * LEON Spurious Trap Handler |
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| 3 | * |
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| 4 | * This is just enough of a trap handler to let us know what |
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| 5 | * the likely source of the trap was. |
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| 6 | * |
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| 7 | * Developed as part of the port of RTEMS to the LEON implementation |
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| 8 | * of the SPARC by On-Line Applications Research Corporation (OAR) |
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| 9 | * under contract to the European Space Agency (ESA). |
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| 10 | * |
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| 11 | * COPYRIGHT (c) 1995. European Space Agency. |
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| 12 | * |
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| 13 | * Modified for LEON3 BSP. |
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| 14 | * COPYRIGHT (c) 2004. |
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| 15 | * Gaisler Research. |
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| 16 | * |
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| 17 | * This terms of the RTEMS license apply to this file. |
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| 18 | * |
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| 19 | * $Id$ |
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| 20 | */ |
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| 21 | |
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| 22 | #include <bsp.h> |
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| 23 | |
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[2f9e237] | 24 | #include <rtems/bspIo.h> |
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[41c9282] | 25 | |
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| 26 | /* |
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| 27 | * bsp_spurious_handler |
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| 28 | * |
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| 29 | * Print a message on the debug console and then die |
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| 30 | */ |
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| 31 | |
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| 32 | rtems_isr bsp_spurious_handler( |
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| 33 | rtems_vector_number trap, |
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| 34 | CPU_Interrupt_frame *isf |
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| 35 | ) |
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| 36 | { |
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| 37 | uint32_t real_trap; |
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| 38 | |
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| 39 | real_trap = SPARC_REAL_TRAP_NUMBER(trap); |
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| 40 | |
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[55cb7c9] | 41 | printk( "Unexpected trap (0x%2d) at address 0x%08x\n", real_trap, isf->tpc); |
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[41c9282] | 42 | |
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| 43 | switch (real_trap) { |
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| 44 | |
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| 45 | /* |
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| 46 | * First the ones defined by the basic architecture |
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| 47 | */ |
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| 48 | |
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| 49 | case 0x00: |
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[55cb7c9] | 50 | printk( "reset\n" ); |
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[41c9282] | 51 | break; |
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| 52 | case 0x01: |
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[55cb7c9] | 53 | printk( "instruction access exception\n" ); |
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[41c9282] | 54 | break; |
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| 55 | case 0x02: |
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[55cb7c9] | 56 | printk( "illegal instruction\n" ); |
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[41c9282] | 57 | break; |
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| 58 | case 0x03: |
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[55cb7c9] | 59 | printk( "privileged instruction\n" ); |
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[41c9282] | 60 | break; |
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| 61 | case 0x04: |
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[55cb7c9] | 62 | printk( "fp disabled\n" ); |
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[41c9282] | 63 | break; |
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| 64 | case 0x07: |
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[55cb7c9] | 65 | printk( "memory address not aligned\n" ); |
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[41c9282] | 66 | break; |
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| 67 | case 0x08: |
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[55cb7c9] | 68 | printk( "fp exception\n" ); |
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[41c9282] | 69 | break; |
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| 70 | case 0x09: |
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[2f9e237] | 71 | printk( "Unexpected trap (0x%2d) at address XXX\n", |
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| 72 | real_trap |
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[6dacdf9d] | 73 | /* XXX FIXME isf->tpc */ |
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[55cb7c9] | 74 | ); |
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[41c9282] | 75 | break; |
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| 76 | case 0x0A: |
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[55cb7c9] | 77 | printk( "tag overflow\n" ); |
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[41c9282] | 78 | break; |
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| 79 | |
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| 80 | /* |
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| 81 | * Then the ones defined by the LEON in particular |
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| 82 | */ |
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| 83 | /* FIXME */ |
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| 84 | |
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| 85 | /* |
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| 86 | case LEON_TRAP_TYPE( LEON_INTERRUPT_CORRECTABLE_MEMORY_ERROR ): |
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[55cb7c9] | 87 | printk( "LEON_INTERRUPT_CORRECTABLE_MEMORY_ERROR\n" ); |
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[41c9282] | 88 | break; |
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| 89 | case LEON_TRAP_TYPE( LEON_INTERRUPT_UART_2_RX_TX ): |
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[55cb7c9] | 90 | printk( "LEON_INTERRUPT_UART_2_RX_TX\n" ); |
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[41c9282] | 91 | break; |
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| 92 | case LEON_TRAP_TYPE( LEON_INTERRUPT_UART_1_RX_TX ): |
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[55cb7c9] | 93 | printk( "LEON_INTERRUPT_UART_1_RX_TX\n" ); |
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[41c9282] | 94 | break; |
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| 95 | case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_0 ): |
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[55cb7c9] | 96 | printk( "LEON_INTERRUPT_EXTERNAL_0\n" ); |
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[41c9282] | 97 | break; |
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| 98 | case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_1 ): |
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[55cb7c9] | 99 | printk( "LEON_INTERRUPT_EXTERNAL_1\n" ); |
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[41c9282] | 100 | break; |
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| 101 | case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_2 ): |
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[55cb7c9] | 102 | printk( "LEON_INTERRUPT_EXTERNAL_2\n" ); |
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[41c9282] | 103 | break; |
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| 104 | case LEON_TRAP_TYPE( LEON_INTERRUPT_EXTERNAL_3 ): |
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[55cb7c9] | 105 | printk( "LEON_INTERRUPT_EXTERNAL_3\n" ); |
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[41c9282] | 106 | break; |
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| 107 | case LEON_TRAP_TYPE( LEON_INTERRUPT_TIMER1 ): |
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[55cb7c9] | 108 | printk( "LEON_INTERRUPT_TIMER1\n" ); |
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[41c9282] | 109 | break; |
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| 110 | case LEON_TRAP_TYPE( LEON_INTERRUPT_TIMER2 ): |
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[55cb7c9] | 111 | printk( "LEON_INTERRUPT_TIMER2\n" ); |
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[41c9282] | 112 | break; |
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| 113 | */ |
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| 114 | |
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| 115 | default: |
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| 116 | break; |
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| 117 | } |
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| 118 | |
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| 119 | /* |
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| 120 | * What else can we do but stop ... |
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| 121 | */ |
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| 122 | |
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| 123 | asm volatile( "mov 1, %g1; ta 0x0" ); |
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| 124 | } |
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| 125 | |
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| 126 | /* |
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| 127 | * bsp_spurious_initialize |
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| 128 | * |
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| 129 | * Install the spurious handler for most traps. Note that set_vector() |
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| 130 | * will unmask the corresponding asynchronous interrupt, so the initial |
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| 131 | * interrupt mask is restored after the handlers are installed. |
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| 132 | */ |
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| 133 | |
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| 134 | void bsp_spurious_initialize() |
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| 135 | { |
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| 136 | uint32_t trap; |
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| 137 | uint32_t level; |
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| 138 | /* uint32_t mask; */ |
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| 139 | |
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| 140 | level = sparc_disable_interrupts(); |
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| 141 | /* mask = LEON3_IrqCtrl_Regs->mask_p0; */ |
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| 142 | |
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| 143 | for ( trap=0 ; trap<256 ; trap++ ) { |
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| 144 | |
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| 145 | /* |
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| 146 | * Skip window overflow, underflow, and flush as well as software |
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| 147 | * trap 0 which we will use as a shutdown. Also avoid trap 0x70 - 0x7f |
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| 148 | * which cannot happen and where some of the space is used to pass |
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| 149 | * paramaters to the program. |
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| 150 | */ |
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| 151 | |
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| 152 | if (( trap == 5 || trap == 6 ) || |
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| 153 | (( trap >= 0x11 ) && ( trap <= 0x1f )) || |
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| 154 | (( trap >= 0x70 ) && ( trap <= 0x83 ))) |
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| 155 | continue; |
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| 156 | |
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| 157 | set_vector( |
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| 158 | (rtems_isr_entry) bsp_spurious_handler, |
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| 159 | SPARC_SYNCHRONOUS_TRAP( trap ), |
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| 160 | 1 |
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| 161 | ); |
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| 162 | } |
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| 163 | |
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| 164 | /* LEON3_IrqCtrl_Regs->mask_p0 = mask; */ |
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| 165 | sparc_enable_interrupts(level); |
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| 166 | |
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| 167 | } |
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