FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/nucleus/tmt.S @ 257:c413e791595a
fc-tmsh: added check-ffs1 command, getting ready to begin ffs2 implementation
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Tue, 04 Feb 2014 07:22:19 +0000 |
parents | afceeeb2cba1 |
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rev | line source |
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1 /* |
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2 ************************************************************************ |
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3 * |
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4 * Copyright Mentor Graphics Corporation 2002 |
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5 * All Rights Reserved. |
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6 * |
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7 * THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS |
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8 * THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS |
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9 * SUBJECT TO LICENSE TERMS. |
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10 * |
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11 ************************************************************************ |
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12 ************************************************************************ |
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13 * |
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14 * FILE NAME VERSION |
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15 * |
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16 * tmt.s Nucleus PLUS\ARM925\Code Composer 1.14.1 |
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17 * |
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18 * COMPONENT |
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19 * |
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20 * TM - Timer Management |
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21 * |
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22 * DESCRIPTION |
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23 * |
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24 * This file contains the target dependent routines of the timer |
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25 * management component. |
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26 * |
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27 * FUNCTIONS |
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28 * |
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29 * TMT_Set_Clock Set system clock |
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30 * TMT_Retrieve_Clock Retrieve system clock |
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31 * TMT_Read_Timer Read count-down timer |
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32 * TMT_Enable_Timer Enable count-down timer |
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33 * TMT_Adjust_Timer Adjust count-down timer |
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34 * TMT_Disable_Timer Disable count-down timer |
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35 * TMT_Retrieve_TS_Task Retrieve time-sliced task ptr |
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36 * TMT_Timer_Interrupt Process timer interrupt |
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37 * |
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38 * DEPENDENCIES |
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39 * |
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40 * tc_extr.h Thread Control functions |
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41 * tm_extr.h Timer functions |
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42 * |
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43 * HISTORY |
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44 * |
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45 * NAME DATE REMARKS |
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46 * |
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47 * B. Ronquillo 08-28-2002 Released version 1.14.1 |
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48 * |
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49 * |
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50 ************************************************************************ |
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51 */ |
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52 |
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53 #define NU_SOURCE_FILE |
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54 |
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55 /* |
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56 ****************************** |
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57 * INCLUDE ASSEMBLY CONSTANTS * |
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58 ****************************** |
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59 * Define constants used in low-level initialization. |
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60 */ |
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61 |
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62 #include "asm_defs.h" |
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63 |
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64 .code 32 |
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65 |
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66 .text |
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67 |
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68 /* |
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69 ********************************** |
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70 * LOCAL VARIABLE DECLARATIONS * |
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71 ********************************** |
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72 * Define various data structure pointers so their addresses |
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73 * can be obtained in a PC-relative manner. |
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74 */ |
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75 |
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76 System_Clock: |
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77 .word TMD_System_Clock |
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78 |
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79 Timer: |
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80 .word TMD_Timer |
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81 |
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82 Timer_State: |
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83 .word TMD_Timer_State |
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84 |
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85 Slice_State: |
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86 .word TMD_Time_Slice_State |
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87 |
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88 Time_Slice: |
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89 .word TMD_Time_Slice |
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90 |
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91 Current_Thread: |
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92 .word TCD_Current_Thread |
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93 |
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94 Slice_Task: |
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95 .word TMD_Time_Slice_Task |
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96 |
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97 HISR: |
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98 .word TMD_HISR |
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99 |
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100 Int_Level: |
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101 .word TCD_Interrupt_Level |
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102 |
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103 /* |
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104 ************************************************************************ |
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105 * |
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106 * FUNCTION |
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107 * |
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108 * TMT_Set_Clock |
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109 * |
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110 * DESCRIPTION |
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111 * |
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112 * This function sets the system clock to the specified value. |
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113 * |
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114 * CALLED BY |
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115 * |
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116 * Application |
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117 * |
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118 * CALLS |
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119 * |
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120 * None |
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121 * |
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122 * INPUTS |
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123 * |
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124 * new_value New value for the clock |
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125 * |
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126 * OUTPUTS |
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127 * |
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128 * None |
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129 * |
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130 * HISTORY |
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131 * |
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132 * NAME DATE REMARKS |
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133 * |
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134 * W. Lamie 02-15-1994 Created initial version 1.0 |
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135 * D. Lamie 02-15-1994 Verified version 1.0 |
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136 * |
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137 ************************************************************************ |
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138 */ |
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139 |
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140 @VOID TMT_Set_Clock(UNSIGNED new_value) |
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141 @{ |
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142 |
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143 .globl TMT_Set_Clock |
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144 TMT_Set_Clock: |
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145 |
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146 @ Set the system clock to the specified value. |
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147 @ TMD_System_Clock = new_value; |
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148 |
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149 LDR r1,System_Clock @ Build address of system clock |
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150 STR r0,[r1,#0] @ Store new system clock value |
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151 |
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152 BX r14 @ Return to caller |
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153 |
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154 @} |
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155 |
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156 /* |
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157 ************************************************************************ |
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158 * |
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159 * FUNCTION |
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160 * |
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161 * TMT_Retrieve_Clock |
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162 * |
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163 * DESCRIPTION |
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164 * |
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165 * This function returns the current value of the system clock. |
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166 * |
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167 * CALLED BY |
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168 * |
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169 * Application |
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170 * |
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171 * CALLS |
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172 * |
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173 * None |
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174 * |
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175 * INPUTS |
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176 * |
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177 * None |
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178 * |
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179 * OUTPUTS |
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180 * |
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181 * TMD_System_Clock Value of system clock |
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182 * |
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183 * HISTORY |
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184 * |
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185 * NAME DATE REMARKS |
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186 * |
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187 * W. Lamie 02-15-1994 Created initial version 1.0 |
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188 * D. Lamie 02-15-1994 Verified version 1.0 |
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189 * |
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190 ************************************************************************ |
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191 */ |
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192 |
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193 @UNSIGNED TMT_Retrieve_Clock(void) |
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194 @{ |
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195 |
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196 .globl TMT_Retrieve_Clock |
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197 TMT_Retrieve_Clock: |
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198 |
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199 @ Return the current value of the system clock. |
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200 @ return(TMD_System_Clock); |
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201 |
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202 LDR r0,System_Clock @ Build address to system clock |
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203 LDR r0,[r0,#0] @ Pickup system clock contents |
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204 |
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205 BX r14 @ Return to caller |
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206 |
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207 @} |
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208 |
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209 /* |
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210 ************************************************************************ |
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211 * |
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212 * FUNCTION |
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213 * |
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214 * TMT_Read_Timer |
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215 * |
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216 * DESCRIPTION |
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217 * |
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218 * This function returns the current value of the count-down timer. |
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219 * |
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220 * CALLED BY |
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221 * |
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222 * TMC_Start_Timer Start timer function |
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223 * |
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224 * CALLS |
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225 * |
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226 * None |
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227 * |
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228 * INPUTS |
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229 * |
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230 * None |
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231 * |
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232 * OUTPUTS |
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233 * |
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234 * TMD_Timer Value of count-down timer |
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235 * |
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236 * HISTORY |
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237 * |
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238 * NAME DATE REMARKS |
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239 * |
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240 * W. Lamie 02-15-1994 Created initial version 1.0 |
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241 * D. Lamie 02-15-1994 Verified version 1.0 |
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242 * |
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243 ************************************************************************ |
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244 */ |
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245 |
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246 @UNSIGNED TMT_Read_Timer(void) |
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247 @{ |
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248 |
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249 .globl TMT_Read_Timer |
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250 TMT_Read_Timer: |
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251 |
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252 @ Return the current value of the count-down timer. |
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253 @ return(TMD_Timer); |
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254 |
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255 LDR r0,Timer @ Build address to timer |
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256 LDR r0,[r0,#0] @ Pickup timer contents |
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257 |
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258 BX r14 @ Return to caller |
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259 |
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260 @} |
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261 |
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262 /* |
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263 ************************************************************************ |
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264 * |
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265 * FUNCTION |
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266 * |
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267 * TMT_Enable_Timer |
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268 * |
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269 * DESCRIPTION |
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270 * |
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271 * This function enables the count-down timer with the specified |
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272 * value. |
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273 * |
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274 * CALLED BY |
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275 * |
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276 * TMC_Start_Timer Start timer function |
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277 * TMC_Timer_Task Timer expiration task |
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278 * |
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279 * CALLS |
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280 * |
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281 * None |
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282 * |
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283 * INPUTS |
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284 * |
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285 * time New count-down time |
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286 * |
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287 * OUTPUTS |
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288 * |
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289 * None |
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290 * |
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291 * HISTORY |
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292 * |
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293 * NAME DATE REMARKS |
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294 * |
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295 * W. Lamie 02-15-1994 Created initial version 1.0 |
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296 * D. Lamie 02-15-1994 Verified version 1.0 |
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297 * |
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298 ************************************************************************ |
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299 */ |
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300 |
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301 @VOID TMT_Enable_Timer(UNSIGNED time) |
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302 @{ |
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303 |
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304 .globl TMT_Enable_Timer |
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305 TMT_Enable_Timer: |
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306 |
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307 @ Place the new time value into the count-down timer. |
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308 @ TMD_Timer = time; |
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309 |
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310 LDR r1,Timer @ Build address of timer |
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311 STR r0,[r1,#0] @ Store new timer value |
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312 |
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313 @ Indicate that the timer is active. |
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314 @ TMD_Timer_State = TM_ACTIVE; |
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315 |
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316 MOV r0,#0 @ Build TM_ACTIVE value |
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317 LDR r1,Timer_State @ Build address of timer state var |
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318 STR r0,[r1,#0] @ Change the state to active |
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319 |
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320 BX r14 @ Return to caller |
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321 |
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322 @} |
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323 |
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324 /* |
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325 ************************************************************************ |
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326 * |
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327 * FUNCTION |
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328 * |
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329 * TMT_Adjust_Timer |
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330 * |
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331 * DESCRIPTION |
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332 * |
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333 * This function adjusts the count-down timer with the specified |
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334 * value, if the new value is less than the current. |
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335 * |
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336 * CALLED BY |
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337 * |
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338 * None |
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339 * |
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340 * CALLS |
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341 * |
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342 * None |
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343 * |
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344 * INPUTS |
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345 * |
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346 * time New count-down time. |
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347 * |
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348 * OUTPUTS |
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349 * |
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350 * None |
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351 * |
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352 * HISTORY |
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353 * |
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354 * NAME DATE REMARKS |
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355 * |
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356 * C. Meredith 03-01-1994 Created initial version 1.1 |
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357 * D. Lamie 03-18-1994 Verified version 1.1 |
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358 * C. Meredith 08-27-1994 Corrected bug in new timer |
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359 * adjust routine, resulting in |
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360 * version 1.1a |
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361 * W. Lamie 08-27-1994 Verified version 1.1a |
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362 * |
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363 ************************************************************************ |
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364 */ |
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365 |
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366 @VOID TMT_Adjust_Timer(UNSIGNED time) |
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367 @{ |
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368 |
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369 .globl TMT_Adjust_Timer |
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370 TMT_Adjust_Timer: |
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371 |
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372 @ Lockout all interrupts |
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373 @ TMD_Timer_State = TM_NOT_ACTIVE; |
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374 |
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375 MRS r3,CPSR @ Pickup current CPSR |
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376 ORR r2,r3,#LOCKOUT @ Build lockout CPSR |
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377 MSR CPSR,r2 @ Setup new CPSR interrupt bits |
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378 |
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379 @ Check for the new value is less than the current time value |
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380 @ if (time < TMD_Timer) |
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|
381 |
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382 LDR r1,Timer @ Build address to timer var |
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383 LDR r2,[r1,#0] @ read value of the timer |
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384 CMP r2,r0 @ Do Timer - time > 0, means |
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385 BLT TMT_No_Adjust @ time < Timer. |
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|
386 |
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387 @ Adjust the time |
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388 @ TMD_Timer = time; |
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|
389 |
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390 STR r0,[r1,#0] @ load passed in timer value |
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|
391 |
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392 @ Return to caller after restoring interrupts |
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|
393 |
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394 TMT_No_Adjust: |
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|
395 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
396 MSR CPSR,r3 @ Setup new CPSR enable bits |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
397 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
398 BX r14 @ Return to caller |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
399 @} |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
400 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
401 /* |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
402 ************************************************************************ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
403 * |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
404 * FUNCTION |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
405 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
406 * TMT_Disable_Timer |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
407 * |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
408 * DESCRIPTION |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
409 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
410 * This function disables the count-down timer. |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
411 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
412 * CALLED BY |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
413 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
414 * TMC_Start_Timer Start timer function |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
415 * TMC_Timer_Task Timer expiration task |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
416 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
417 * CALLS |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
418 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
419 * None |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
420 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
421 * INPUTS |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
422 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
423 * None |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
424 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
425 * OUTPUTS |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
426 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
427 * None |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
428 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
429 * HISTORY |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
430 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
431 * NAME DATE REMARKS |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
432 * |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
433 * W. Lamie 02-15-1994 Created initial version 1.0 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
434 * D. Lamie 02-15-1994 Verified version 1.0 |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
435 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
436 ************************************************************************ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
437 */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
438 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
439 @VOID TMT_Disable_Timer(void) |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
440 @{ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
441 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
442 .globl TMT_Disable_Timer |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
443 TMT_Disable_Timer: |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
444 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
445 @ Disable the count-down timer. |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
446 @ TMD_Timer_State = TM_NOT_ACTIVE; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
447 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
448 MOV r1,#1 @ Build TM_NOT_ACTIVE value |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
449 LDR r0,Timer_State @ Build address to timer state var |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
450 STR r1,[r0,#0] @ Change timer state to not active |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
451 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
452 BX r14 @ Return to caller |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
453 @} |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
454 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
455 /* |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
456 ************************************************************************ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
457 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
458 * FUNCTION |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
459 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
460 * TMT_Retreive_TS_Timer |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
461 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
462 * DESCRIPTION |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
463 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
464 * This function returns the time-sliced task pointer. |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
465 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
466 * CALLED BY |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
467 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
468 * TMC_Timer_HISR Timer HISR |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
469 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
470 * CALLS |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
471 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
472 * None |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
473 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
474 * INPUTS |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
475 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
476 * None |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
477 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
478 * OUTPUTS |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
479 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
480 * TMD_Time_Slice_Task Time sliced task pointer |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
481 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
482 * HISTORY |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
483 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
484 * NAME DATE REMARKS |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
485 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
486 * C. Meredith 03-01-1994 Created initial version 1.1 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
487 * D. Lamie 03-18-1994 Verified version 1.1 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
488 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
489 ************************************************************************ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
490 */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
491 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
492 @NU_TASK TMT_Retrieve_TS_Task (VOID) |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
493 @{ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
494 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
495 .globl TMT_Retrieve_TS_Task |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
496 TMT_Retrieve_TS_Task: |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
497 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
498 @ Read the current TMD_Time_Slice_Task variable and load for |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
499 @ return to caller. |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
500 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
501 LDR r1,Slice_Task @ Build address to timer slice var |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
502 LDR r0,[r1,#0] @ Get task pointer to be returned |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
503 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
504 @ Return to caller time slice value back to caller |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
505 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
506 BX r14 @ Return to caller |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
507 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
508 @} |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
509 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
510 /* |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
511 ************************************************************************ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
512 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
513 * FUNCTION |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
514 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
515 * TMT_Timer_Interrupt |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
516 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
517 * DESCRIPTION |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
518 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
519 * This function processes the actual hardware interrupt. |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
520 * Processing includes updating the system clock and the count- |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
521 * down timer and the time-slice timer. If one or both of the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
522 * timers expire, the timer HISR is activated. |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
523 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
524 * CALLED BY |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
525 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
526 * Interrupt Vector |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
527 * |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
528 * CALLS |
947b1f473960
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|
529 * |
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parents:
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changeset
|
530 * TCT_Activate_HISR Activate timer HISR |
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parents:
diff
changeset
|
531 * TCT_Interrupt_Context_Save Save interrupted context |
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parents:
diff
changeset
|
532 * TCT_Interrupt_Context_Restore Restore interrupted context |
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parents:
diff
changeset
|
533 * |
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diff
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|
534 * INPUTS |
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parents:
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|
535 * |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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|
536 * None |
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parents:
diff
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|
537 * |
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parents:
diff
changeset
|
538 * OUTPUTS |
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parents:
diff
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|
539 * |
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parents:
diff
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|
540 * None |
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parents:
diff
changeset
|
541 * |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
542 * HISTORY |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
543 * |
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parents:
diff
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|
544 * NAME DATE REMARKS |
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parents:
diff
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|
545 * |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
546 * W. Lamie 02-15-1994 Created initial version 1.0 |
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parents:
diff
changeset
|
547 * D. Lamie 02-15-1994 Verified version 1.0 |
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parents:
diff
changeset
|
548 * |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
549 ************************************************************************ |
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parents:
diff
changeset
|
550 */ |
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parents:
diff
changeset
|
551 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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changeset
|
552 @VOID TMT_Timer_Interrupt(void) |
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parents:
diff
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|
553 @{ |
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parents:
diff
changeset
|
554 .globl TMT_Timer_Interrupt |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
555 TMT_Timer_Interrupt: |
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parents:
diff
changeset
|
556 |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
557 MRS r1,CPSR @ Pickup current CPSR |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
558 ORR r1,r1,#LOCKOUT @ Set the interrupt lockout bits |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
559 MSR CPSR,r1 @ Lockout interrupts |
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parents:
diff
changeset
|
560 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
561 @ Increment the system clock. |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
562 @ TMD_System_Clock++; |
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parents:
diff
changeset
|
563 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
564 LDR r0,System_Clock @ Pickup system clock address |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
565 LDR r1,[r0,#0] @ Pickup system clock contents |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
566 ADD r1,r1,#1 @ Increment system clock |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
567 STR r1,[r0,#0] @ Store new system clock value |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
568 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
569 @ Determine if the count-down timer is active. |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
570 @ if (TMD_Timer_State == TM_ACTIVE) |
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parents:
diff
changeset
|
571 @ { |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
572 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
573 LDR r1,Timer_State @ Build address to timer state flag |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
574 LDR r0,[r1,#0] @ Pickup timer state |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
575 MOV r3,#2 @ Build expired value |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
576 CMP r0,#0 @ Is there a timer active? |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
577 BNE TMT_No_Timer_Active @ No, skip timer processing |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
578 |
947b1f473960
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parents:
diff
changeset
|
579 @ Decrement the count-down timer. |
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parents:
diff
changeset
|
580 @ TMD_Timer--; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
581 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
582 LDR r0,Timer @ Build timer address |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
583 LDR r2,[r0,#0] @ Pickup the current timer value |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
584 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
585 @ Test if the Timer is at 0 and if so skip the decrement |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
586 cmp r2,#1 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
587 beq EXPIRED |
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parents:
diff
changeset
|
588 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
589 SUBS r2,r2,#1 @ Decrement the timer value |
947b1f473960
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parents:
diff
changeset
|
590 STR r2,[r0,#0] @ Store the new timer value |
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parents:
diff
changeset
|
591 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
592 bne TMT_No_Timer_Active @ Skip over the Set Timer State |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
593 |
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parents:
diff
changeset
|
594 @ Determine if the timer has expired. If so, modify the state |
947b1f473960
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parents:
diff
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|
595 @ to indicate that it has expired. |
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diff
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|
596 @ if (TMD_Timer == 0) |
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parents:
diff
changeset
|
597 |
947b1f473960
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parents:
diff
changeset
|
598 @ TMD_Timer_State = TM_EXPIRED; |
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parents:
diff
changeset
|
599 |
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parents:
diff
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|
600 EXPIRED: |
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parents:
diff
changeset
|
601 STREQ r3,[r1,#0] @ Change the timer state to |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
602 @ expired |
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parents:
diff
changeset
|
603 |
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parents:
diff
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|
604 @ } |
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diff
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|
605 TMT_No_Timer_Active: |
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diff
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|
606 |
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diff
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|
607 @ Determine if the time-slice timer is active. Note that the parameters |
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parents:
diff
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|
608 @ for the time-slice are controlled by the Thread Control (TC) |
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parents:
diff
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|
609 @ component. |
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diff
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|
610 @ if (TMD_Time_Slice_State == TM_ACTIVE) |
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parents:
diff
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|
611 @ { |
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diff
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|
612 LDR r0,Slice_State @ Build time slice state address |
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parents:
diff
changeset
|
613 LDR r2,[r0,#0] @ Pickup time slice state |
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parents:
diff
changeset
|
614 CMP r2,#0 @ Is there a time slice active? |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
615 BNE TMT_No_Time_Slice_Active @ No, skip time slice processing |
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diff
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|
616 |
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|
617 @ Decrement the time slice counter. |
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diff
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|
618 @ TMD_Time_Slice--; |
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parents:
diff
changeset
|
619 |
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diff
changeset
|
620 LDR r2,Time_Slice @ Build time slice address |
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parents:
diff
changeset
|
621 LDR r3,[r2,#0] @ Pickup the time slice value |
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parents:
diff
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|
622 SUBS r3,r3,#1 @ Decrement the time slice |
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parents:
diff
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|
623 STR r3,[r2,#0] @ Store the new time slice value |
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diff
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|
624 |
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diff
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|
625 @ Determine if the time-slice timer has expired. If so, modify the |
947b1f473960
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parents:
diff
changeset
|
626 @ time-slice state to indicate that it has. |
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parents:
diff
changeset
|
627 @ if (TMD_Time_Slice == 0) |
947b1f473960
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parents:
diff
changeset
|
628 @ { |
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diff
changeset
|
629 |
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diff
changeset
|
630 BNE TMT_No_Time_Slice_Active @ Has time slice expired? |
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parents:
diff
changeset
|
631 |
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parents:
diff
changeset
|
632 @ TMD_Time_Slice_State = TM_EXPIRED; |
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parents:
diff
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|
633 |
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parents:
diff
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|
634 MOV r3,#2 @ Build TM_EXPIRED value |
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parents:
diff
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|
635 STR r3,[r0,#0] @ Indicate time slice is expired |
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parents:
diff
changeset
|
636 |
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|
637 @ Copy the current thread into the time-slice task pointer. |
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parents:
diff
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|
638 @ TMD_Time_Slice_Task = TCD_Current_Thread; |
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parents:
diff
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|
639 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
640 LDR r2,Current_Thread @ Pickup current thread pointer adr |
947b1f473960
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parents:
diff
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|
641 LDR r2,[r2,#0] @ Pickup current thread pointer |
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parents:
diff
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|
642 LDR r3,Slice_Task @ Pickup time slice task pointer ad |
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parents:
diff
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|
643 STR r2,[r3,#0] @ Store current thread pointer |
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parents:
diff
changeset
|
644 |
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diff
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|
645 @ ((TC_TCB *) TCD_Current_Thread) -> tc_cur_time_slice = 1; |
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parents:
diff
changeset
|
646 |
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parents:
diff
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|
647 MOV r3,#1 @ For safety, place a minimal time- |
947b1f473960
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parents:
diff
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|
648 STR a4,[a3,#0x20]! @ slice into the task's control |
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parents:
diff
changeset
|
649 @ block |
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parents:
diff
changeset
|
650 |
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parents:
diff
changeset
|
651 @ } |
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parents:
diff
changeset
|
652 @ } |
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diff
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|
653 TMT_No_Time_Slice_Active: |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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654 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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655 @ Determine if either of the basic timers have expired. If so, |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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656 @ activate the timer HISR. |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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657 @ if ((TMD_Timer_State == TM_EXPIRED) || |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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658 @ (TMD_Time_Slice_State == TM_EXPIRED)) |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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659 @ { |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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660 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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661 LDR r1,[r1,#0] @ Pickup timer state |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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662 CMP r1,#2 @ Does it indicate expiration? |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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663 LDRNE r0,[r0,#0] @ Pickup time slice state |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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664 CMPNE r0,#2 @ Does it indicate expiration? |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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665 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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666 BXNE r14 @ Return if no expiration |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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667 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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668 @ Activate the HISR timer function. |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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669 @ TCT_Activate_HISR(&TMD_HISR); |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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670 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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671 STR r14,[r13, #-4]! @ Save r14 on the stack |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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672 LDR r0,HISR @ Build address of timer HISR |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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673 BL TCT_Activate_HISR @ Activate timer HISR |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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674 LDR r14,[r13], #4 @ Recover return address |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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675 @ } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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676 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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677 BX r14 @ Return to caller |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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678 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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679 @} |