FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/nucleus/dms.c @ 427:7e305184b0b4
doc/Compal-unlock: TFC139 RTC alarm oddity explained
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Sat, 21 Jun 2014 08:01:14 +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 /* Copyright Mentor Graphics Corporation 2002 */ |
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4 /* All Rights Reserved. */ |
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5 /* */ |
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6 /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */ |
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7 /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */ |
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8 /* SUBJECT TO LICENSE TERMS. */ |
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9 /* */ |
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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 /* dms.c Nucleus PLUS 1.14 */ |
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17 /* */ |
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18 /* COMPONENT */ |
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19 /* */ |
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20 /* DM - Dynamic Memory 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 supplemental routines for the Dynamic */ |
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25 /* Memory Management component. */ |
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26 /* */ |
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27 /* DATA STRUCTURES */ |
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28 /* */ |
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29 /* None */ |
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30 /* */ |
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31 /* FUNCTIONS */ |
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32 /* */ |
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33 /* DMS_Allocate_Aligned_Memory Allocate an aligned memory */ |
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34 /* block from a dynamic */ |
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35 /* memory pool */ |
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36 /* DEPENDENCIES */ |
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37 /* */ |
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38 /* cs_extr.h Common Service functions */ |
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39 /* tc_extr.h Thread Control functions */ |
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40 /* dm_extr.h Partition functions */ |
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41 /* hi_extr.h History functions */ |
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42 /* */ |
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43 /* HISTORY */ |
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44 /* */ |
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45 /* DATE REMARKS */ |
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46 /* */ |
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47 /* 01-15-1999 Created initial revision */ |
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48 /* 03-26-1999 Released 1.11m (new release */ |
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49 /* numbering scheme) */ |
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50 /* 04-17-2002 Released version 1.13m */ |
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51 /* 11-07-2002 Released version 1.14 */ |
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52 /*************************************************************************/ |
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53 #define NU_SOURCE_FILE |
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54 |
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55 #include "cs_extr.h" /* Common service functions */ |
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56 #include "tc_extr.h" /* Thread control functions */ |
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57 #include "dm_extr.h" /* Dynamic memory functions */ |
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58 #include "hi_extr.h" /* History functions */ |
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59 #include "profiler.h" /* ProView interface */ |
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60 |
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61 |
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62 /* Define external inner-component global data references. */ |
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63 |
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64 |
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65 /* Define internal component function prototypes. */ |
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66 VOID DMC_Cleanup(VOID *information); |
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67 |
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68 |
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69 /*************************************************************************/ |
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70 /* */ |
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71 /* FUNCTION */ |
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72 /* */ |
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73 /* DMS_Allocate_Aligned_Memory */ |
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74 /* */ |
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75 /* DESCRIPTION */ |
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76 /* */ |
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77 /* This function allocates memory from the specified dynamic memory */ |
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78 /* pool. If dynamic memory is currently available, this function */ |
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79 /* is completed immediately. Otherwise, if there is not enough */ |
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80 /* memory currently available, task suspension is possible. */ |
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81 /* */ |
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82 /* CALLED BY */ |
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83 /* */ |
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84 /* Application */ |
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85 /* */ |
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86 /* CALLS */ |
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87 /* */ |
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88 /* CSC_Place_On_List Place on suspend list */ |
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89 /* [HIC_Make_History_Entry] Make entry in history log */ |
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90 /* TCC_Suspend_Task Suspend calling task */ |
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91 /* TCC_Task_Priority Pickup task priority */ |
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92 /* [TCT_Check_Stack] Stack checking function */ |
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93 /* TCT_Current_Thread Pickup current thread pointer*/ |
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94 /* TCT_Protect Protect memory pool */ |
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95 /* TCT_Set_Suspend_Protect Save suspend protection */ |
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96 /* TCT_System_Protect Protect system structures */ |
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97 /* TCT_Unprotect Release protection */ |
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98 /* TCT_Unprotect_Specific Release specific protection */ |
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99 /* */ |
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100 /* INPUTS */ |
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101 /* */ |
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102 /* pool_ptr Memory pool pointer */ |
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103 /* return_pointer Pointer to the destination */ |
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104 /* memory pointer */ |
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105 /* size Number of bytes requested */ |
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106 /* alignment Required alignment of */ |
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107 /* destination memory pointer */ |
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108 /* suspend Suspension option if full */ |
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109 /* */ |
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110 /* OUTPUTS */ |
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111 /* */ |
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112 /* NU_SUCCESS If service is successful */ |
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113 /* NU_NO_MEMORY Memory not available */ |
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114 /* NU_TIMEOUT If timeout on service */ |
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115 /* NU_POOL_DELETED If memory pool deleted */ |
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116 /* during suspension */ |
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117 /* */ |
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118 /* HISTORY */ |
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119 /* */ |
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120 /* NAME DATE REMARKS */ |
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121 /* */ |
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122 /* T. Larsen 01-15-1999 Created initial revision */ |
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123 /* R. Baum 06-06-2002 Fixed problem with DM_OVERHEAD */ |
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124 /* allocation. Added Proview */ |
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125 /* support. */ |
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126 /* */ |
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127 /*************************************************************************/ |
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128 STATUS DMS_Allocate_Aligned_Memory(NU_MEMORY_POOL *pool_ptr, |
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129 VOID **return_pointer, UNSIGNED size, |
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130 UNSIGNED alignment, UNSIGNED suspend) |
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131 { |
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132 R1 DM_PCB *pool; /* Pool control block ptr */ |
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133 R2 DM_SUSPEND *suspend_ptr; /* Pointer to suspend block */ |
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134 DM_SUSPEND suspend_block; /* Allocate suspension block */ |
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135 R4 DM_HEADER *memory_ptr; /* Pointer to memory */ |
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136 R3 DM_HEADER *new_ptr; /* New split block pointer */ |
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137 UNSIGNED free_size; /* Size of block found */ |
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138 TC_TCB *task; /* Task pointer */ |
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139 STATUS status; /* Completion status */ |
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140 UNSIGNED address; /* Address of start of block */ |
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141 UNSIGNED split_size; /* Bytes for front split */ |
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142 UNSIGNED next_aligned; /* Next aligned block addr */ |
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143 NU_SUPERV_USER_VARIABLES |
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144 |
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145 /* Switch to supervisor mode */ |
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146 NU_SUPERVISOR_MODE(); |
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147 |
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148 /* Move input pool pointer into internal pointer. */ |
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149 pool = (DM_PCB *) pool_ptr; |
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150 |
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151 |
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152 #ifdef NU_ENABLE_STACK_CHECK |
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153 |
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154 /* Call stack checking function to check for an overflow condition. */ |
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155 TCT_Check_Stack(); |
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|
156 |
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|
157 #endif |
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|
158 |
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|
159 #ifdef NU_ENABLE_HISTORY |
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|
160 |
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161 /* Make an entry that corresponds to this function in the system history |
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|
162 log. */ |
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|
163 HIC_Make_History_Entry(NU_ALLOCATE_ALIGNED_ID, (UNSIGNED) pool, |
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164 (UNSIGNED) return_pointer, (UNSIGNED) size); |
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|
165 |
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|
166 #endif |
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|
167 |
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168 /* Initialize the status as successful. */ |
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|
169 status = NU_SUCCESS; |
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|
170 |
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|
171 /* Adjust the request to a size evenly divisible by the number of bytes |
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|
172 in an UNSIGNED data element. Also, check to make sure it is of the |
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|
173 minimum size. */ |
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|
174 if (size < pool -> dm_min_allocation) |
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|
175 |
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|
176 /* Change size to the minimum allocation. */ |
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|
177 size = pool -> dm_min_allocation; |
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|
178 else |
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|
179 |
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|
180 /* Insure that size is a multiple of the UNSIGNED size. */ |
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|
181 size = |
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|
182 ((size + sizeof(UNSIGNED) - 1)/sizeof(UNSIGNED)) * sizeof(UNSIGNED); |
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|
183 |
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|
184 /* Adjust the requested alignment to one evenly divisible by the number of |
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|
185 bytes in an UNSIGNED data element. */ |
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|
186 alignment = |
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|
187 ((alignment + sizeof(UNSIGNED) - 1)/sizeof(UNSIGNED)) * sizeof(UNSIGNED); |
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|
188 |
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|
189 /* Protect against simultaneous access to the memory pool. */ |
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|
190 TCT_Protect(&(pool -> dm_protect)); |
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|
191 |
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|
192 /* Search the memory list for the first available block of memory that |
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|
193 satisfies the request. Note that blocks are merged during the |
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|
194 deallocation function. */ |
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|
195 memory_ptr = pool -> dm_search_ptr; |
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|
196 do |
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|
197 { |
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|
198 |
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|
199 /* Determine if the block is free and if it can satisfy the request. */ |
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|
200 if (memory_ptr -> dm_memory_free) |
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|
201 |
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|
202 /* Calculate the free block size. */ |
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|
203 free_size = (((BYTE_PTR) (memory_ptr -> dm_next_memory)) - |
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|
204 ((BYTE_PTR) memory_ptr)) - DM_OVERHEAD; |
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|
205 else |
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|
206 |
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|
207 /* There are no free bytes available. */ |
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|
208 free_size = 0; |
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|
209 |
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|
210 /* Free block may be large enough, now check alignment */ |
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|
211 if (free_size >= size) |
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|
212 { |
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|
213 address = ((UNSIGNED)(memory_ptr)) + DM_OVERHEAD; |
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|
214 |
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|
215 /* Is this free block, minus the overhead, already aligned? */ |
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|
216 if (address % alignment != 0) |
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|
217 { |
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|
218 /* Not aligned, can the free block be split in front? */ |
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|
219 next_aligned = address + (alignment - 1); |
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|
220 next_aligned /= alignment; |
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|
221 next_aligned *= alignment; |
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|
222 split_size = next_aligned - address; |
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|
223 |
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|
224 /* Is space from start of block to aligned location large enough |
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|
225 to contain 2 DM_OVERHEAD plus pool -> dm_min_allocation? */ |
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|
226 if (split_size < ((2 * DM_OVERHEAD) + pool -> dm_min_allocation)) |
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|
227 { |
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|
228 /* No, so try to make space for overhead and dm_min_allocation */ |
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|
229 next_aligned = address + (2 * DM_OVERHEAD) + |
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|
230 (pool -> dm_min_allocation) + (alignment - 1); |
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|
231 next_aligned /= alignment; |
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|
232 next_aligned *= alignment; |
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|
233 split_size = next_aligned - address; |
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|
234 } |
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|
235 |
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|
236 /* Adjust free_size for result of front split */ |
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|
237 if (free_size > split_size) |
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|
238 |
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|
239 free_size -= split_size; |
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diff
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|
240 |
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diff
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|
241 else |
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|
242 |
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|
243 /* Can't adjust block beginning, so keep searching */ |
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|
244 free_size = 0; |
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diff
changeset
|
245 } |
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diff
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|
246 } |
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changeset
|
247 |
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|
248 /* Determine if the search should continue. */ |
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|
249 if (free_size < size) |
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|
250 |
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|
251 /* Large enough block has not been found. Move the search |
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252 pointer to the next block. */ |
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253 memory_ptr = memory_ptr -> dm_next_memory; |
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254 } while((free_size < size) && (memory_ptr != pool -> dm_search_ptr)); |
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255 |
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256 /* Determine if the memory is available. */ |
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257 if (free_size >= size) |
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258 { |
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259 |
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260 /* A block that satisfies the request has been found. */ |
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261 |
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262 /* Is a front split required? The front split will represent the chunk |
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263 of memory that goes from the last pointer to the aligned address. */ |
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264 if(address % alignment != 0) |
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265 { |
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266 /* Not aligned, front split the block, leaving an allocated block. */ |
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267 new_ptr = (DM_HEADER*)(((UNSIGNED)(memory_ptr)) + split_size); |
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268 |
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269 /* Mark the new block as free. */ |
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270 new_ptr -> dm_memory_free = NU_TRUE; |
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271 |
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272 /* Put the pool pointer into the new block. */ |
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273 new_ptr -> dm_memory_pool = pool; |
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274 |
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275 /* Build the necessary pointers. */ |
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276 new_ptr -> dm_previous_memory = memory_ptr; |
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277 new_ptr -> dm_next_memory = memory_ptr -> dm_next_memory; |
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278 (new_ptr -> dm_next_memory) -> dm_previous_memory = new_ptr; |
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279 memory_ptr -> dm_next_memory = new_ptr; |
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280 |
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281 /* Decrement the available byte count by one DM_OVERHEAD. */ |
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282 pool -> dm_available = pool -> dm_available - DM_OVERHEAD; |
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283 |
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284 /* Point to new aligned free block. */ |
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285 memory_ptr = new_ptr; |
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286 } |
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287 |
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288 /* Determine if the remaining block needs to be tail split. */ |
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289 if (free_size >= (size + DM_OVERHEAD + pool -> dm_min_allocation)) |
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290 { |
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291 |
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292 /* Yes, split the block. */ |
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293 new_ptr = (DM_HEADER *) (((BYTE_PTR) memory_ptr) + size + |
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294 DM_OVERHEAD); |
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295 |
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296 /* Mark the new block as free. */ |
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297 new_ptr -> dm_memory_free = NU_TRUE; |
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298 |
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299 /* Put the pool pointer into the new block. */ |
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300 new_ptr -> dm_memory_pool = pool; |
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301 |
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302 /* Build the necessary pointers. */ |
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303 new_ptr -> dm_previous_memory = memory_ptr; |
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304 new_ptr -> dm_next_memory = memory_ptr -> dm_next_memory; |
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305 (new_ptr -> dm_next_memory) -> dm_previous_memory = new_ptr; |
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306 memory_ptr -> dm_next_memory = new_ptr; |
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307 |
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308 /* Decrement the available byte count. */ |
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309 pool -> dm_available = pool -> dm_available - size - DM_OVERHEAD; |
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310 } |
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311 else |
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312 |
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313 /* Decrement the entire free size from the available bytes |
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314 count. */ |
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315 pool -> dm_available = pool -> dm_available - free_size; |
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316 |
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317 /* Mark the allocated block as not available. */ |
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318 memory_ptr -> dm_memory_free = NU_FALSE; |
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|
319 |
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320 /* Should the search pointer be moved? */ |
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321 if (pool -> dm_search_ptr == memory_ptr) |
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|
322 |
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323 /* Move the search pointer to the next free memory slot. */ |
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324 pool -> dm_search_ptr = memory_ptr -> dm_next_memory; |
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|
325 |
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326 /* Return a memory address to the caller. */ |
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327 *return_pointer = (VOID *) (((BYTE_PTR) memory_ptr) + DM_OVERHEAD); |
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328 #ifdef INCLUDE_PROVIEW |
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329 _RTProf_DumpMemoryPool(RT_PROF_ALLOCATE_MEMORY,pool,RT_PROF_OK); |
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330 #endif /*INCLUDE_PROVIEW*/ |
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331 } |
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|
332 else |
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|
333 { |
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|
334 |
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335 /* Enough dynamic memory is not available. Determine if suspension is |
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|
336 required. */ |
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|
337 if (suspend) |
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|
338 { |
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|
339 |
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340 /* Suspension is selected. */ |
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|
341 |
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342 /* Increment the number of tasks waiting. */ |
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343 pool -> dm_tasks_waiting++; |
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|
344 |
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345 #ifdef INCLUDE_PROVIEW |
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346 _RTProf_DumpMemoryPool(RT_PROF_ALLOCATE_MEMORY,pool,RT_PROF_WAIT); |
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347 #endif /*INCLUDE_PROVIEW*/ |
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348 /* Setup the suspend block and suspend the calling task. */ |
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349 suspend_ptr = &suspend_block; |
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350 suspend_ptr -> dm_memory_pool = pool; |
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351 suspend_ptr -> dm_request_size = size; |
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352 suspend_ptr -> dm_suspend_link.cs_next = NU_NULL; |
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353 suspend_ptr -> dm_suspend_link.cs_previous = NU_NULL; |
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|
354 task = (TC_TCB *) TCT_Current_Thread(); |
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355 suspend_ptr -> dm_suspended_task = task; |
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|
356 |
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357 /* Determine if priority or FIFO suspension is associated with the |
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|
358 memory pool. */ |
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|
359 if (pool -> dm_fifo_suspend) |
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|
360 { |
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|
361 |
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362 /* FIFO suspension is required. Link the suspend block into |
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363 the list of suspended tasks on this memory pool. */ |
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|
364 CSC_Place_On_List((CS_NODE **) |
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|
365 &(pool -> dm_suspension_list), |
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|
366 &(suspend_ptr -> dm_suspend_link)); |
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|
367 } |
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|
368 else |
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|
369 { |
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|
370 |
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|
371 /* Get the priority of the current thread so the suspend block |
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|
372 can be placed in the appropriate place. */ |
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|
373 suspend_ptr -> dm_suspend_link.cs_priority = |
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|
374 TCC_Task_Priority(task); |
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|
375 |
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376 CSC_Priority_Place_On_List((CS_NODE **) |
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377 &(pool -> dm_suspension_list), |
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378 &(suspend_ptr -> dm_suspend_link)); |
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379 } |
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380 |
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381 /* Protect against system access. */ |
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382 TCT_System_Protect(); |
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383 |
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384 /* Save the list protection in preparation for suspension. */ |
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385 TCT_Set_Suspend_Protect(&(pool -> dm_protect)); |
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386 |
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387 /* Release protection of dynamic memory pool. */ |
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388 TCT_Unprotect_Specific(&(pool -> dm_protect)); |
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389 |
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390 /* Finally, suspend the calling task. Note that the suspension call |
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391 automatically clears the system protection. */ |
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392 TCC_Suspend_Task((NU_TASK *) task, NU_MEMORY_SUSPEND, |
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393 DMC_Cleanup, suspend_ptr, suspend); |
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394 |
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395 /* Pickup the return status. */ |
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396 status = suspend_ptr -> dm_return_status; |
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397 *return_pointer = suspend_ptr -> dm_return_pointer; |
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398 } |
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399 else |
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400 { |
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401 |
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402 /* No suspension requested. Simply return an error status. */ |
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403 status = NU_NO_MEMORY; |
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404 *return_pointer = NU_NULL; |
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405 #ifdef INCLUDE_PROVIEW |
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406 _RTProf_DumpMemoryPool(RT_PROF_ALLOCATE_MEMORY,pool,RT_PROF_FAIL); |
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407 #endif /*INCLUDE_PROVIEW*/ |
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408 } |
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409 } |
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410 |
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411 /* Release protection of the memory pool. */ |
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412 TCT_Unprotect(); |
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413 |
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414 /* Return to user mode */ |
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415 NU_USER_MODE(); |
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416 |
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417 /* Return the completion status. */ |
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418 return(status); |
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419 } |
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420 |
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421 |
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422 |
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423 |
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424 |
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425 |