| 1 | /* |
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| 2 | * MCF5206eLITE startup code |
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| 3 | * |
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| 4 | * This file contains the entry point for the application. |
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| 5 | * The name of this entry point is compiler dependent. |
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| 6 | * It jumps to the BSP which is responsible for performing |
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| 7 | * all initialization. |
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| 8 | * |
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| 9 | * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia |
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| 10 | * Author: Victor V. Vengerov <vvv@oktet.ru> |
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| 11 | * |
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| 12 | * Based on work: |
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| 13 | * Author: |
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| 14 | * David Fiddes, D.J@fiddes.surfaid.org |
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| 15 | * http://www.calm.hw.ac.uk/davidf/coldfire/ |
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| 16 | * |
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| 17 | * COPYRIGHT (c) 1989-1998. |
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| 18 | * On-Line Applications Research Corporation (OAR). |
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| 19 | * |
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| 20 | * The license and distribution terms for this file may be |
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| 21 | * found in the file LICENSE in this distribution or at |
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| 22 | * |
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| 23 | * http://www.rtems.com/license/LICENSE. |
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| 24 | * |
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| 25 | * $Id$ |
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| 26 | */ |
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| 27 | |
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| 28 | #include <rtems/asm.h> |
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| 29 | #include "bsp.h" |
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| 30 | |
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| 31 | BEGIN_CODE |
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| 32 | |
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| 33 | /* Initial stack situated in on-chip static memory */ |
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| 34 | #define INITIAL_STACK BSP_MEM_ADDR_SRAM+BSP_MEM_SIZE_SRAM-4 |
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| 35 | |
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| 36 | PUBLIC (INTERRUPT_VECTOR) |
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| 37 | SYM(INTERRUPT_VECTOR): |
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| 38 | .long INITIAL_STACK | 00: initial SSP |
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| 39 | .long start | 01: Initial PC |
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| 40 | .long _unexp_exception | 02: Access Error |
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| 41 | .long _unexp_exception | 03: Address Error |
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| 42 | .long _unexp_exception | 04: Illegal Instruction |
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| 43 | .long _reserved_int | 05: Reserved |
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| 44 | .long _reserved_int | 06: Reserved |
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| 45 | .long _reserved_int | 07: Reserved |
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| 46 | .long _unexp_exception | 08: Priveledge Violation |
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| 47 | .long _unexp_exception | 09: Trace |
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| 48 | .long _unexp_exception | 0A: Unimplemented A-Line |
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| 49 | .long _unexp_exception | 0B: Unimplemented F-Line |
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| 50 | .long _unexp_exception | 0C: Debug interrupt |
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| 51 | .long _reserved_int | 0D: Reserved |
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| 52 | .long _unexp_exception | 0E: Format error |
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| 53 | .long _unexp_exception | 0F: Uninitialized interrupt |
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| 54 | .long _reserved_int | 10: Reserved |
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| 55 | .long _reserved_int | 11: Reserved |
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| 56 | .long _reserved_int | 12: Reserved |
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| 57 | .long _reserved_int | 13: Reserved |
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| 58 | .long _reserved_int | 14: Reserved |
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| 59 | .long _reserved_int | 15: Reserved |
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| 60 | .long _reserved_int | 16: Reserved |
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| 61 | .long _reserved_int | 17: Reserved |
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| 62 | .long _spurious_int | 18: Spurious interrupt |
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| 63 | .long _avec1_int | 19: Autovector Level 1 |
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| 64 | .long _avec2_int | 1A: Autovector Level 2 |
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| 65 | .long _avec3_int | 1B: Autovector Level 3 |
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| 66 | .long _avec4_int | 1C: Autovector Level 4 |
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| 67 | .long _avec5_int | 1D: Autovector Level 5 |
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| 68 | .long _avec6_int | 1E: Autovector Level 6 |
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| 69 | .long _avec7_int | 1F: Autovector Level 7 |
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| 70 | .long _unexp_exception | 20: TRAP #0 |
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| 71 | .long _unexp_exception | 21: TRAP #1 |
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| 72 | .long _unexp_exception | 22: TRAP #2 |
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| 73 | .long _unexp_exception | 23: TRAP #3 |
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| 74 | .long _unexp_exception | 24: TRAP #4 |
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| 75 | .long _unexp_exception | 25: TRAP #5 |
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| 76 | .long _unexp_exception | 26: TRAP #6 |
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| 77 | .long _unexp_exception | 27: TRAP #7 |
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| 78 | .long _unexp_exception | 28: TRAP #8 |
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| 79 | .long _unexp_exception | 29: TRAP #9 |
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| 80 | .long _unexp_exception | 2A: TRAP #10 |
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| 81 | .long _unexp_exception | 2B: TRAP #11 |
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| 82 | .long _unexp_exception | 2C: TRAP #12 |
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| 83 | .long _unexp_exception | 2D: TRAP #13 |
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| 84 | .long _unexp_exception | 2E: TRAP #14 |
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| 85 | .long _unexp_exception | 2F: TRAP #15 |
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| 86 | .long _reserved_int | 30: Reserved |
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| 87 | .long _reserved_int | 31: Reserved |
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| 88 | .long _reserved_int | 32: Reserved |
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| 89 | .long _reserved_int | 33: Reserved |
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| 90 | .long _reserved_int | 34: Reserved |
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| 91 | .long _reserved_int | 35: Reserved |
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| 92 | .long _reserved_int | 36: Reserved |
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| 93 | .long _reserved_int | 37: Reserved |
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| 94 | .long _reserved_int | 38: Reserved |
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| 95 | .long _reserved_int | 39: Reserved |
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| 96 | .long _reserved_int | 3A: Reserved |
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| 97 | .long _reserved_int | 3B: Reserved |
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| 98 | .long _reserved_int | 3C: Reserved |
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| 99 | .long _reserved_int | 3D: Reserved |
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| 100 | .long _reserved_int | 3E: Reserved |
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| 101 | .long _reserved_int | 3F: Reserved |
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| 102 | |
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| 103 | .long _unexp_int | 40-FF: User defined interrupts |
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| 104 | .long _unexp_int |
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| 105 | .long _unexp_int |
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| 106 | .long _unexp_int |
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| 107 | .long _unexp_int |
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| 108 | .long _unexp_int |
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| 109 | .long _unexp_int |
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| 110 | .long _unexp_int |
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| 111 | .long _unexp_int |
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| 112 | .long _unexp_int |
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| 113 | .long _unexp_int |
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| 114 | .long _unexp_int |
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| 115 | .long _unexp_int |
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| 116 | .long _unexp_int |
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| 117 | .long _unexp_int |
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| 118 | .long _unexp_int |
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| 119 | |
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| 120 | .long _unexp_int | 50: |
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| 121 | .long _unexp_int |
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| 122 | .long _unexp_int |
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| 123 | .long _unexp_int |
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| 124 | .long _unexp_int |
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| 125 | .long _unexp_int |
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| 126 | .long _unexp_int |
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| 127 | .long _unexp_int |
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| 128 | .long _unexp_int |
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| 129 | .long _unexp_int |
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| 130 | .long _unexp_int |
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| 131 | .long _unexp_int |
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| 132 | .long _unexp_int |
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| 133 | .long _unexp_int |
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| 134 | .long _unexp_int |
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| 135 | .long _unexp_int |
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| 136 | |
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| 137 | .long _unexp_int | 60: |
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| 138 | .long _unexp_int |
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| 139 | .long _unexp_int |
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| 140 | .long _unexp_int |
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| 141 | .long _unexp_int |
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| 142 | .long _unexp_int |
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| 143 | .long _unexp_int |
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| 144 | .long _unexp_int |
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| 145 | .long _unexp_int |
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| 146 | .long _unexp_int |
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| 147 | .long _unexp_int |
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| 148 | .long _unexp_int |
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| 149 | .long _unexp_int |
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| 150 | .long _unexp_int |
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| 151 | .long _unexp_int |
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| 152 | .long _unexp_int |
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| 153 | |
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| 154 | .long _unexp_int | 70: |
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| 155 | .long _unexp_int |
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| 156 | .long _unexp_int |
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| 157 | .long _unexp_int |
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| 158 | .long _unexp_int |
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| 159 | .long _unexp_int |
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| 160 | .long _unexp_int |
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| 161 | .long _unexp_int |
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| 162 | .long _unexp_int |
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| 163 | .long _unexp_int |
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| 164 | .long _unexp_int |
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| 165 | .long _unexp_int |
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| 166 | .long _unexp_int |
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| 167 | .long _unexp_int |
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| 168 | .long _unexp_int |
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| 169 | .long _unexp_int |
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| 170 | |
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| 171 | .long _unexp_int | 80: |
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| 172 | .long _unexp_int |
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| 173 | .long _unexp_int |
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| 174 | .long _unexp_int |
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| 175 | .long _unexp_int |
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| 176 | .long _unexp_int |
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| 177 | .long _unexp_int |
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| 178 | .long _unexp_int |
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| 179 | .long _unexp_int |
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| 180 | .long _unexp_int |
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| 181 | .long _unexp_int |
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| 182 | .long _unexp_int |
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| 183 | .long _unexp_int |
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| 184 | .long _unexp_int |
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| 185 | .long _unexp_int |
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| 186 | .long _unexp_int |
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| 187 | |
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| 188 | .long _unexp_int | 90: |
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| 189 | .long _unexp_int |
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| 190 | .long _unexp_int |
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| 191 | .long _unexp_int |
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| 192 | .long _unexp_int |
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| 193 | .long _unexp_int |
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| 194 | .long _unexp_int |
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| 195 | .long _unexp_int |
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| 196 | .long _unexp_int |
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| 197 | .long _unexp_int |
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| 198 | .long _unexp_int |
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| 199 | .long _unexp_int |
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| 200 | .long _unexp_int |
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| 201 | .long _unexp_int |
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| 202 | .long _unexp_int |
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| 203 | .long _unexp_int |
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| 204 | |
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| 205 | .long _unexp_int | A0: |
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| 206 | .long _unexp_int |
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| 207 | .long _unexp_int |
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| 208 | .long _unexp_int |
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| 209 | .long _unexp_int |
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| 210 | .long _unexp_int |
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| 211 | .long _unexp_int |
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| 212 | .long _unexp_int |
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| 213 | .long _unexp_int |
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| 214 | .long _unexp_int |
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| 215 | .long _unexp_int |
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| 216 | .long _unexp_int |
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| 217 | .long _unexp_int |
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| 218 | .long _unexp_int |
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| 219 | .long _unexp_int |
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| 220 | .long _unexp_int |
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| 221 | |
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| 222 | .long _unexp_int | B0: |
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| 223 | .long _unexp_int |
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| 224 | .long _unexp_int |
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| 225 | .long _unexp_int |
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| 226 | .long _unexp_int |
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| 227 | .long _unexp_int |
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| 228 | .long _unexp_int |
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| 229 | .long _unexp_int |
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| 230 | .long _unexp_int |
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| 231 | .long _unexp_int |
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| 232 | .long _unexp_int |
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| 233 | .long _unexp_int |
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| 234 | .long _unexp_int |
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| 235 | .long _unexp_int |
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| 236 | .long _unexp_int |
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| 237 | .long _unexp_int |
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| 238 | |
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| 239 | .long _unexp_int | C0: |
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| 240 | .long _unexp_int |
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| 241 | .long _unexp_int |
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| 242 | .long _unexp_int |
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| 243 | .long _unexp_int |
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| 244 | .long _unexp_int |
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| 245 | .long _unexp_int |
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| 246 | .long _unexp_int |
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| 247 | .long _unexp_int |
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| 248 | .long _unexp_int |
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| 249 | .long _unexp_int |
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| 250 | .long _unexp_int |
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| 251 | .long _unexp_int |
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| 252 | .long _unexp_int |
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| 253 | .long _unexp_int |
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| 254 | .long _unexp_int |
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| 255 | |
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| 256 | .long _unexp_int | D0: |
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| 257 | .long _unexp_int |
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| 258 | .long _unexp_int |
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| 259 | .long _unexp_int |
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| 260 | .long _unexp_int |
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| 261 | .long _unexp_int |
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| 262 | .long _unexp_int |
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| 263 | .long _unexp_int |
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| 264 | .long _unexp_int |
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| 265 | .long _unexp_int |
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| 266 | .long _unexp_int |
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| 267 | .long _unexp_int |
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| 268 | .long _unexp_int |
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| 269 | .long _unexp_int |
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| 270 | .long _unexp_int |
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| 271 | .long _unexp_int |
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| 272 | |
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| 273 | .long _unexp_int | E0: |
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| 274 | .long _unexp_int |
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| 275 | .long _unexp_int |
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| 276 | .long _unexp_int |
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| 277 | .long _unexp_int |
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| 278 | .long _unexp_int |
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| 279 | .long _unexp_int |
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| 280 | .long _unexp_int |
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| 281 | .long _unexp_int |
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| 282 | .long _unexp_int |
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| 283 | .long _unexp_int |
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| 284 | .long _unexp_int |
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| 285 | .long _unexp_int |
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| 286 | .long _unexp_int |
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| 287 | .long _unexp_int |
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| 288 | .long _unexp_int |
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| 289 | |
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| 290 | .long _unexp_int | F0: |
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| 291 | .long _unexp_int |
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| 292 | .long _unexp_int |
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| 293 | .long _unexp_int |
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| 294 | .long _unexp_int |
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| 295 | .long _unexp_int |
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| 296 | .long _unexp_int |
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| 297 | .long _unexp_int |
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| 298 | .long _unexp_int |
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| 299 | .long _unexp_int |
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| 300 | .long _unexp_int |
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| 301 | .long _unexp_int |
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| 302 | .long _unexp_int |
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| 303 | .long _unexp_int |
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| 304 | .long _unexp_int |
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| 305 | .long _unexp_int |
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| 306 | |
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| 307 | PUBLIC(start) |
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| 308 | SYM(start): |
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| 309 | move.w #0x2700,sr | First turn off all interrupts! |
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| 310 | |
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| 311 | move.l #(BSP_MEM_ADDR_SRAM + MCF5206E_RAMBAR_V),d0 |
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| 312 | movec d0,rambar0 | ...so we have a stack |
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| 313 | |
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| 314 | move.l #(INITIAL_STACK),sp | Set up stack again (may be we are |
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| 315 | | going here from monitor or with |
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| 316 | | BDM interface assistance) |
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| 317 | |
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| 318 | /* |
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| 319 | * Remainder of the startup code is handled by C code |
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| 320 | */ |
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| 321 | jmp SYM(Init5206e) | Start C code (which never returns) |
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| 322 | |
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| 323 | /*************************************************************************** |
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| 324 | Function : CopyDataClearBSSAndStart |
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| 325 | |
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| 326 | Description : Copy DATA segment, clear BSS segment, initialize heap, |
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| 327 | initialise real stack, start C program. Assume that DATA and BSS sizes |
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| 328 | are multiples of 4. |
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| 329 | ***************************************************************************/ |
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| 330 | PUBLIC (CopyDataClearBSSAndStart) |
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| 331 | SYM(CopyDataClearBSSAndStart): |
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| 332 | lea copy_start,a0 | Get start of DATA in RAM |
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| 333 | lea SYM(etext),a2 | Get start of DATA in ROM |
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| 334 | cmpl a0,a2 | Are they the same? |
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| 335 | beq.s NOCOPY | Yes, no copy necessary |
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| 336 | lea copy_end,a1 | Get end of DATA in RAM |
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| 337 | bra.s COPYLOOPTEST | Branch into copy loop |
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| 338 | COPYLOOP: |
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| 339 | movel a2@+,a0@+ | Copy word from ROM to RAM |
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| 340 | COPYLOOPTEST: |
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| 341 | cmpl a1,a0 | Done? |
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| 342 | bcs.s COPYLOOP | No, skip |
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| 343 | NOCOPY: |
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| 344 | |
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| 345 | lea clear_start,a0 | Get start of BSS |
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| 346 | lea clear_end,a1 | Get end of BSS |
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| 347 | clrl d0 | Value to set |
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| 348 | bra.s ZEROLOOPTEST | Branch into clear loop |
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| 349 | ZEROLOOP: |
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| 350 | movel d0,a0@+ | Clear a word |
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| 351 | ZEROLOOPTEST: |
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| 352 | cmpl a1,a0 | Done? |
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| 353 | bcs.s ZEROLOOP | No, skip |
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| 354 | move 4(a7),d0 |
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| 355 | move d0,_M68k_Ramsize | Set Ram Size |
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| 356 | |
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| 357 | /* |
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| 358 | * Right : Now we're ready to boot RTEMS |
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| 359 | */ |
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| 360 | clrl d0 | Pass in null to all boot_card() params |
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| 361 | movel d0,a7@- | environp |
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| 362 | movel d0,a7@- | argv |
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| 363 | movel d0,a7@- | argc |
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| 364 | jsr SYM(boot_card) | Call C boot_card function to startup RTEMS |
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| 365 | |
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| 366 | # Wait forever |
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| 367 | _stop: |
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| 368 | nop |
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| 369 | stop #0x2700 |
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| 370 | jmp _stop |
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| 371 | |
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| 372 | # The following labelled nops is a placeholders for breakpoints |
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| 373 | _unexp_exception: |
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| 374 | nop |
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| 375 | jmp _stop |
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| 376 | |
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| 377 | _unexp_int: |
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| 378 | nop |
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| 379 | jmp _stop |
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| 380 | |
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| 381 | _reserved_int: |
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| 382 | nop |
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| 383 | jmp _stop |
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| 384 | |
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| 385 | _spurious_int: |
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| 386 | nop |
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| 387 | jmp _stop |
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| 388 | |
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| 389 | _avec1_int: |
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| 390 | nop |
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| 391 | jmp _unexp_int |
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| 392 | |
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| 393 | _avec2_int: |
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| 394 | nop |
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| 395 | jmp _unexp_int |
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| 396 | |
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| 397 | _avec3_int: |
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| 398 | nop |
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| 399 | jmp _unexp_int |
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| 400 | |
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| 401 | _avec4_int: |
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| 402 | nop |
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| 403 | jmp _unexp_int |
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| 404 | |
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| 405 | _avec5_int: |
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| 406 | nop |
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| 407 | jmp _unexp_int |
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| 408 | |
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| 409 | _avec6_int: |
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| 410 | nop |
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| 411 | jmp _unexp_int |
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| 412 | |
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| 413 | _avec7_int: |
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| 414 | nop |
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| 415 | jmp _unexp_int |
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| 416 | |
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| 417 | END_CODE |
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| 418 | |
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| 419 | END |
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