1 | /* asm.h |
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2 | * |
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3 | * This include file attempts to address the problems |
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4 | * caused by incompatible flavors of assemblers and |
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5 | * toolsets. It primarily addresses variations in the |
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6 | * use of leading underscores on symbols and the requirement |
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7 | * that register names be preceded by a %. |
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8 | * |
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9 | * |
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10 | * NOTE: The spacing in the use of these macros |
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11 | * is critical to them working as advertised. |
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12 | * |
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13 | * COPYRIGHT: |
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14 | * |
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15 | * This file is based on similar code found in newlib available |
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16 | * from ftp.cygnus.com. The file which was used had no copyright |
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17 | * notice. This file is freely distributable as long as the source |
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18 | * of the file is noted. This file is: |
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19 | * |
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20 | * COPYRIGHT (c) 1995. |
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21 | * i-cubed ltd. |
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22 | * |
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23 | * COPYRIGHT (c) 1994. |
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24 | * On-Line Applications Research Corporation (OAR). |
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25 | * |
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26 | * $Id$ |
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27 | */ |
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28 | |
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29 | #ifndef __PPC_ASM_h |
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30 | #define __PPC_ASM_h |
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31 | |
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32 | /* |
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33 | * Indicate we are in an assembly file and get the basic CPU definitions. |
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34 | */ |
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35 | |
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36 | #ifndef ASM |
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37 | #define ASM |
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38 | #endif |
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39 | #include <rtems/score/cpuopts.h> |
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40 | #include <rtems/score/ppc.h> |
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41 | |
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42 | /* |
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43 | * Recent versions of GNU cpp define variables which indicate the |
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44 | * need for underscores and percents. If not using GNU cpp or |
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45 | * the version does not support this, then you will obviously |
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46 | * have to define these as appropriate. |
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47 | */ |
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48 | |
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49 | #ifndef __USER_LABEL_PREFIX__ |
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50 | #define __USER_LABEL_PREFIX__ |
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51 | #endif |
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52 | |
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53 | #ifndef __REGISTER_PREFIX__ |
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54 | #define __REGISTER_PREFIX__ |
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55 | #endif |
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56 | |
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57 | #ifndef __FLOAT_REGISTER_PREFIX__ |
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58 | #define __FLOAT_REGISTER_PREFIX__ __REGISTER_PREFIX__ |
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59 | #endif |
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60 | |
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61 | #if (PPC_ABI == PPC_ABI_POWEROPEN) |
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62 | #ifndef __PROC_LABEL_PREFIX__ |
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63 | #define __PROC_LABEL_PREFIX__ . |
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64 | #endif |
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65 | #endif |
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66 | |
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67 | #ifndef __PROC_LABEL_PREFIX__ |
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68 | #define __PROC_LABEL_PREFIX__ __USER_LABEL_PREFIX__ |
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69 | #endif |
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70 | |
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71 | /* ANSI concatenation macros. */ |
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72 | |
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73 | #define CONCAT1(a, b) CONCAT2(a, b) |
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74 | #define CONCAT2(a, b) a ## b |
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75 | |
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76 | /* Use the right prefix for global labels. */ |
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77 | |
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78 | #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x) |
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79 | |
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80 | /* Use the right prefix for procedure labels. */ |
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81 | |
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82 | #define PROC(x) CONCAT1 (__PROC_LABEL_PREFIX__, x) |
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83 | |
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84 | /* Use the right prefix for registers. */ |
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85 | |
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86 | #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x) |
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87 | |
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88 | /* Use the right prefix for floating point registers. */ |
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89 | |
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90 | #define FREG(x) CONCAT1 (__FLOAT_REGISTER_PREFIX__, x) |
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91 | |
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92 | /* |
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93 | * define macros for all of the registers on this CPU |
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94 | * |
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95 | * EXAMPLE: #define d0 REG (d0) |
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96 | */ |
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97 | #define r0 REG(0) |
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98 | #define r1 REG(1) |
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99 | #define r2 REG(2) |
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100 | #define r3 REG(3) |
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101 | #define r4 REG(4) |
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102 | #define r5 REG(5) |
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103 | #define r6 REG(6) |
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104 | #define r7 REG(7) |
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105 | #define r8 REG(8) |
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106 | #define r9 REG(9) |
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107 | #define r10 REG(10) |
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108 | #define r11 REG(11) |
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109 | #define r12 REG(12) |
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110 | #define r13 REG(13) |
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111 | #define r14 REG(14) |
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112 | #define r15 REG(15) |
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113 | #define r16 REG(16) |
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114 | #define r17 REG(17) |
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115 | #define r18 REG(18) |
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116 | #define r19 REG(19) |
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117 | #define r20 REG(20) |
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118 | #define r21 REG(21) |
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119 | #define r22 REG(22) |
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120 | #define r23 REG(23) |
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121 | #define r24 REG(24) |
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122 | #define r25 REG(25) |
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123 | #define r26 REG(26) |
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124 | #define r27 REG(27) |
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125 | #define r28 REG(28) |
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126 | #define r29 REG(29) |
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127 | #define r30 REG(30) |
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128 | #define r31 REG(31) |
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129 | #define f0 FREG(0) |
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130 | #define f1 FREG(1) |
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131 | #define f2 FREG(2) |
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132 | #define f3 FREG(3) |
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133 | #define f4 FREG(4) |
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134 | #define f5 FREG(5) |
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135 | #define f6 FREG(6) |
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136 | #define f7 FREG(7) |
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137 | #define f8 FREG(8) |
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138 | #define f9 FREG(9) |
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139 | #define f10 FREG(10) |
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140 | #define f11 FREG(11) |
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141 | #define f12 FREG(12) |
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142 | #define f13 FREG(13) |
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143 | #define f14 FREG(14) |
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144 | #define f15 FREG(15) |
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145 | #define f16 FREG(16) |
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146 | #define f17 FREG(17) |
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147 | #define f18 FREG(18) |
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148 | #define f19 FREG(19) |
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149 | #define f20 FREG(20) |
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150 | #define f21 FREG(21) |
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151 | #define f22 FREG(22) |
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152 | #define f23 FREG(23) |
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153 | #define f24 FREG(24) |
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154 | #define f25 FREG(25) |
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155 | #define f26 FREG(26) |
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156 | #define f27 FREG(27) |
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157 | #define f28 FREG(28) |
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158 | #define f29 FREG(29) |
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159 | #define f30 FREG(30) |
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160 | #define f31 FREG(31) |
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161 | |
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162 | /* |
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163 | * Some special purpose registers (SPRs). |
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164 | */ |
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165 | #define srr0 0x01a |
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166 | #define srr1 0x01b |
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167 | #if defined(ppc403) || defined(ppc405) |
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168 | #define srr2 0x3de /* IBM 400 series only */ |
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169 | #define srr3 0x3df /* IBM 400 series only */ |
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170 | #endif /* ppc403 or ppc405 */ |
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171 | |
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172 | #define sprg0 0x110 |
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173 | #define sprg1 0x111 |
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174 | #define sprg2 0x112 |
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175 | #define sprg3 0x113 |
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176 | |
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177 | #define dar 0x013 /* Data Address Register */ |
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178 | #define dec 0x016 /* Decrementer Register */ |
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179 | |
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180 | #if defined(ppc403) || defined(ppc405) |
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181 | /* the following SPR/DCR registers exist only in IBM 400 series */ |
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182 | #define dear 0x3d5 |
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183 | #define evpr 0x3d6 /* SPR: exception vector prefix register */ |
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184 | #define iccr 0x3fb /* SPR: instruction cache control reg. */ |
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185 | #define dccr 0x3fa /* SPR: data cache control reg. */ |
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186 | |
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187 | #if defined (ppc403) |
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188 | #define exisr 0x040 /* DCR: external interrupt status register */ |
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189 | #define exier 0x042 /* DCR: external interrupt enable register */ |
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190 | #endif /* ppc403 */ |
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191 | #if defined(ppc405) |
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192 | #define exisr 0x0C0 /* DCR: external interrupt status register */ |
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193 | #define exier 0x0C2 /* DCR: external interrupt enable register */ |
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194 | #endif /* ppc405 */ |
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195 | |
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196 | #define br0 0x080 /* DCR: memory bank register 0 */ |
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197 | #define br1 0x081 /* DCR: memory bank register 1 */ |
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198 | #define br2 0x082 /* DCR: memory bank register 2 */ |
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199 | #define br3 0x083 /* DCR: memory bank register 3 */ |
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200 | #define br4 0x084 /* DCR: memory bank register 4 */ |
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201 | #define br5 0x085 /* DCR: memory bank register 5 */ |
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202 | #define br6 0x086 /* DCR: memory bank register 6 */ |
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203 | #define br7 0x087 /* DCR: memory bank register 7 */ |
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204 | /* end of IBM400 series register definitions */ |
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205 | |
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206 | #elif defined(mpc860) || defined(mpc821) |
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207 | /* The following registers are for the MPC8x0 */ |
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208 | #define der 0x095 /* Debug Enable Register */ |
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209 | #define ictrl 0x09E /* Instruction Support Control Register */ |
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210 | #define immr 0x27E /* Internal Memory Map Register */ |
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211 | /* end of MPC8x0 registers */ |
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212 | #endif |
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213 | |
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214 | /* |
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215 | * Following must be tailor for a particular flavor of the C compiler. |
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216 | * They may need to put underscores in front of the symbols. |
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217 | */ |
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218 | |
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219 | #define PUBLIC_VAR(sym) .globl SYM (sym) |
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220 | #define EXTERN_VAR(sym) .extern SYM (sym) |
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221 | #define PUBLIC_PROC(sym) .globl PROC (sym) |
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222 | #define EXTERN_PROC(sym) .extern PROC (sym) |
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223 | |
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224 | /* Other potentially assembler specific operations */ |
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225 | #if PPC_ASM == PPC_ASM_ELF |
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226 | #define ALIGN(n,p) .align p |
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227 | #define DESCRIPTOR(x) \ |
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228 | .section .descriptors,"aw"; \ |
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229 | PUBLIC_VAR (x); \ |
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230 | SYM (x):; \ |
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231 | .long PROC (x); \ |
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232 | .long s.got; \ |
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233 | .long 0 |
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234 | |
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235 | #define EXT_SYM_REF(x) .long x |
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236 | #define EXT_PROC_REF(x) .long x |
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237 | |
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238 | /* |
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239 | * Define macros to handle section beginning and ends. |
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240 | */ |
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241 | |
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242 | #define BEGIN_CODE_DCL .text |
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243 | #define END_CODE_DCL |
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244 | #define BEGIN_DATA_DCL .data |
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245 | #define END_DATA_DCL |
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246 | #define BEGIN_CODE .text |
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247 | #define END_CODE |
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248 | #define BEGIN_DATA .data |
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249 | #define END_DATA |
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250 | #define BEGIN_BSS .bss |
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251 | #define END_BSS |
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252 | #define END |
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253 | |
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254 | #elif PPC_ASM == PPC_ASM_XCOFF |
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255 | #define ALIGN(n,p) .align p |
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256 | #define DESCRIPTOR(x) \ |
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257 | .csect x[DS]; \ |
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258 | .globl x[DS]; \ |
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259 | .long PROC (x)[PR]; \ |
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260 | .long TOC[tc0] |
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261 | |
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262 | #define EXT_SYM_REF(x) .long x[RW] |
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263 | #define EXT_PROC_REF(x) .long x[DS] |
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264 | |
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265 | /* |
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266 | * Define macros to handle section beginning and ends. |
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267 | */ |
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268 | |
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269 | #define BEGIN_CODE_DCL .csect .text[PR] |
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270 | #define END_CODE_DCL |
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271 | #define BEGIN_DATA_DCL .csect .data[RW] |
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272 | #define END_DATA_DCL |
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273 | #define BEGIN_CODE .csect .text[PR] |
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274 | #define END_CODE |
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275 | #define BEGIN_DATA .csect .data[RW] |
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276 | #define END_DATA |
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277 | #define BEGIN_BSS .bss |
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278 | #define END_BSS |
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279 | #define END |
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280 | |
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281 | #else |
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282 | #error "PPC_ASM_TYPE is not properly defined" |
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283 | #endif |
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284 | #ifndef PPC_ASM |
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285 | #error "PPC_ASM_TYPE is not properly defined" |
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286 | #endif |
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287 | |
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288 | |
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289 | #endif |
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290 | /* end of include file */ |
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291 | |
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292 | |
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