1 | /* vectors.s 1.1 - 95/12/04 |
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2 | * |
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3 | * This file contains the assembly code for the PowerPC 403 |
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4 | * interrupt veneers for RTEMS. |
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5 | * |
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6 | * Author: Andrew Bray <andy@i-cubed.co.uk> |
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7 | * |
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8 | * COPYRIGHT (c) 1995 by i-cubed ltd. |
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9 | * |
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10 | * To anyone who acknowledges that this file is provided "AS IS" |
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11 | * without any express or implied warranty: |
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12 | * permission to use, copy, modify, and distribute this file |
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13 | * for any purpose is hereby granted without fee, provided that |
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14 | * the above copyright notice and this notice appears in all |
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15 | * copies, and that the name of i-cubed limited not be used in |
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16 | * advertising or publicity pertaining to distribution of the |
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17 | * software without specific, written prior permission. |
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18 | * i-cubed limited makes no representations about the suitability |
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19 | * of this software for any purpose. |
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20 | * |
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21 | */ |
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22 | |
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23 | /* |
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24 | * The issue with this file is getting it loaded at the right place. |
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25 | * The first vector MUST be at address 0x????0100. |
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26 | * How this is achieved is dependant on the tool chain. |
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27 | * |
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28 | * However the basic mechanism for ELF assemblers is to create a |
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29 | * section called ".vectors", which will be loaded to an address |
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30 | * between 0x????0000 and 0x????0100 (inclusive) via a link script. |
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31 | * |
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32 | * The variable 'PPC_VECTOR_FILE_BASE' must be defined to be the |
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33 | * offset from 0x????0000 to the first location in the file. This |
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34 | * will usually be 0x0000 or 0x0100. |
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35 | * |
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36 | * $Id$ |
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37 | */ |
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38 | |
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39 | #include <bsp.h> /* PPC_VECTOR_FILE_BASE */ |
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40 | #include <rtems/asm.h> |
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41 | |
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42 | #ifndef PPC_VECTOR_FILE_BASE |
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43 | #error "PPC_VECTOR_FILE_BASE is not defined." |
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44 | #endif |
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45 | |
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46 | /* Where this file will be loaded */ |
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47 | .set file_base, PPC_VECTOR_FILE_BASE |
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48 | |
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49 | /* Offset to store reg 0 */ |
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50 | |
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51 | .set IP_LINK, 0 |
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52 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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53 | .set IP_0, (IP_LINK + 56) |
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54 | #else |
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55 | .set IP_0, (IP_LINK + 8) |
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56 | #endif |
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57 | .set IP_2, (IP_0 + 4) |
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58 | |
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59 | .set IP_3, (IP_2 + 4) |
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60 | .set IP_4, (IP_3 + 4) |
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61 | .set IP_5, (IP_4 + 4) |
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62 | .set IP_6, (IP_5 + 4) |
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63 | |
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64 | .set IP_7, (IP_6 + 4) |
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65 | .set IP_8, (IP_7 + 4) |
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66 | .set IP_9, (IP_8 + 4) |
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67 | .set IP_10, (IP_9 + 4) |
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68 | |
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69 | .set IP_11, (IP_10 + 4) |
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70 | .set IP_12, (IP_11 + 4) |
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71 | .set IP_13, (IP_12 + 4) |
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72 | .set IP_28, (IP_13 + 4) |
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73 | |
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74 | .set IP_29, (IP_28 + 4) |
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75 | .set IP_30, (IP_29 + 4) |
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76 | .set IP_31, (IP_30 + 4) |
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77 | .set IP_CR, (IP_31 + 4) |
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78 | |
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79 | .set IP_CTR, (IP_CR + 4) |
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80 | .set IP_XER, (IP_CTR + 4) |
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81 | .set IP_LR, (IP_XER + 4) |
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82 | .set IP_PC, (IP_LR + 4) |
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83 | |
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84 | .set IP_MSR, (IP_PC + 4) |
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85 | |
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86 | .set IP_END, (IP_MSR + 16) |
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87 | |
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88 | /* Vector offsets */ |
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89 | .set begin_vector,0x0000 |
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90 | .set crit_vector,0x0100 |
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91 | .set mach_vector,0x0200 |
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92 | .set prot_vector,0x0300 |
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93 | .set ext_vector,0x0500 |
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94 | .set align_vector,0x0600 |
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95 | .set prog_vector,0x0700 |
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96 | .set dec_vector,0x0900 |
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97 | .set sys_vector,0x0C00 |
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98 | .set pit_vector,0x1000 |
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99 | .set fit_vector,0x1010 |
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100 | .set wadt_vector,0x1020 |
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101 | .set debug_vector,0x2000 |
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102 | |
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103 | /* Go to the right section */ |
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104 | #if PPC_ASM == PPC_ASM_ELF |
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105 | .section .vectors,"awx",@progbits |
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106 | #endif |
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107 | |
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108 | PUBLIC_VAR (__vectors) |
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109 | SYM (__vectors): |
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110 | |
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111 | /* Critical error handling */ |
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112 | .org crit_vector - file_base |
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113 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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114 | #if (PPC_HAS_FPU) |
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115 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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116 | #else |
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117 | stwu r1, -(20*4 + IP_END)(r1) |
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118 | #endif |
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119 | #else |
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120 | stwu r1, -(IP_END)(r1) |
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121 | #endif |
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122 | stw r0, IP_0(r1) |
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123 | |
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124 | li r0, PPC_IRQ_CRIT |
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125 | b PROC (_ISR_HandlerC) |
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126 | |
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127 | /* Machine check exception */ |
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128 | .org mach_vector - file_base |
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129 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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130 | #if (PPC_HAS_FPU) |
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131 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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132 | #else |
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133 | stwu r1, -(20*4 + IP_END)(r1) |
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134 | #endif |
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135 | #else |
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136 | stwu r1, -(IP_END)(r1) |
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137 | #endif |
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138 | stw r0, IP_0(r1) |
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139 | |
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140 | li r0, PPC_IRQ_MCHECK |
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141 | b PROC (_ISR_HandlerC) |
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142 | |
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143 | /* Protection exception */ |
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144 | .org prot_vector - file_base |
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145 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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146 | #if (PPC_HAS_FPU) |
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147 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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148 | #else |
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149 | stwu r1, -(20*4 + IP_END)(r1) |
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150 | #endif |
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151 | #else |
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152 | stwu r1, -(IP_END)(r1) |
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153 | #endif |
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154 | stw r0, IP_0(r1) |
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155 | |
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156 | li r0, PPC_IRQ_PROTECT |
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157 | b PROC (_ISR_Handler) |
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158 | |
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159 | /* External interrupt */ |
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160 | .org ext_vector - file_base |
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161 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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162 | #if (PPC_HAS_FPU) |
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163 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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164 | #else |
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165 | stwu r1, -(20*4 + IP_END)(r1) |
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166 | #endif |
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167 | #else |
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168 | stwu r1, -(IP_END)(r1) |
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169 | #endif |
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170 | stw r0, IP_0(r1) |
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171 | |
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172 | li r0, PPC_IRQ_EXTERNAL |
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173 | b PROC (_ISR_Handler) |
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174 | |
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175 | /* Align exception */ |
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176 | .org align_vector - file_base |
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177 | .extern align_h |
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178 | b align_h |
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179 | |
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180 | /* Program exception */ |
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181 | .org prog_vector - file_base |
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182 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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183 | #if (PPC_HAS_FPU) |
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184 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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185 | #else |
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186 | stwu r1, -(20*4 + IP_END)(r1) |
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187 | #endif |
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188 | #else |
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189 | stwu r1, -(IP_END)(r1) |
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190 | #endif |
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191 | stw r0, IP_0(r1) |
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192 | |
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193 | li r0, PPC_IRQ_PROGRAM |
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194 | b PROC (_ISR_Handler) |
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195 | |
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196 | /* Decrementer exception */ |
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197 | .org dec_vector - file_base |
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198 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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199 | #if (PPC_HAS_FPU) |
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200 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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201 | #else |
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202 | stwu r1, -(20*4 + IP_END)(r1) |
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203 | #endif |
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204 | #else |
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205 | stwu r1, -(IP_END)(r1) |
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206 | #endif |
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207 | stw r0, IP_0(r1) |
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208 | |
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209 | li r0, PPC_IRQ_PROGRAM |
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210 | b PROC (_ISR_Handler) |
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211 | |
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212 | /* System call */ |
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213 | .org sys_vector - file_base |
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214 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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215 | #if (PPC_HAS_FPU) |
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216 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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217 | #else |
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218 | stwu r1, -(20*4 + IP_END)(r1) |
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219 | #endif |
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220 | #else |
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221 | stwu r1, -(IP_END)(r1) |
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222 | #endif |
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223 | stw r0, IP_0(r1) |
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224 | |
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225 | li r0, PPC_IRQ_SCALL |
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226 | b PROC (_ISR_Handler) |
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227 | |
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228 | /* PIT interrupt */ |
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229 | .org pit_vector - file_base |
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230 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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231 | #if (PPC_HAS_FPU) |
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232 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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233 | #else |
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234 | stwu r1, -(20*4 + IP_END)(r1) |
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235 | #endif |
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236 | #else |
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237 | stwu r1, -(IP_END)(r1) |
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238 | #endif |
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239 | stw r0, IP_0(r1) |
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240 | |
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241 | li r0, PPC_IRQ_PIT |
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242 | b PROC (_ISR_Handler) |
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243 | |
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244 | /* FIT interrupt */ |
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245 | .org fit_vector - file_base |
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246 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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247 | #if (PPC_HAS_FPU) |
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248 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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249 | #else |
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250 | stwu r1, -(20*4 + IP_END)(r1) |
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251 | #endif |
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252 | #else |
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253 | stwu r1, -(IP_END)(r1) |
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254 | #endif |
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255 | stw r0, IP_0(r1) |
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256 | |
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257 | li r0, PPC_IRQ_FIT |
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258 | b PROC (_ISR_Handler) |
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259 | |
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260 | /* Watchdog interrupt */ |
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261 | .org wadt_vector - file_base |
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262 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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263 | #if (PPC_HAS_FPU) |
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264 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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265 | #else |
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266 | stwu r1, -(20*4 + IP_END)(r1) |
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267 | #endif |
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268 | #else |
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269 | stwu r1, -(IP_END)(r1) |
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270 | #endif |
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271 | stw r0, IP_0(r1) |
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272 | |
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273 | li r0, PPC_IRQ_WATCHDOG |
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274 | b PROC (_ISR_HandlerC) |
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275 | |
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276 | /* Debug exception */ |
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277 | debug: |
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278 | #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) |
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279 | #if (PPC_HAS_FPU) |
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280 | stwu r1, -(20*4 + 18*8 + IP_END)(r1) |
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281 | #else |
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282 | stwu r1, -(20*4 + IP_END)(r1) |
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283 | #endif |
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284 | #else |
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285 | stwu r1, -(IP_END)(r1) |
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286 | #endif |
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287 | stw r0, IP_0(r1) |
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288 | |
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289 | li r0, PPC_IRQ_DEBUG |
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290 | b PROC (_ISR_HandlerC) |
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291 | |
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292 | /* Debug exception */ |
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293 | .org debug_vector - file_base |
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294 | b debug |
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