1 | /* |
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2 | * thread.c - implementation of thread operations (user & kernel) |
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3 | * |
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4 | * Author Ghassan Almaless (2008,2009,2010,2011,2012) |
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5 | * Alain Greiner (2016,2017) |
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6 | * |
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7 | * Copyright (c) UPMC Sorbonne Universites |
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8 | * |
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9 | * This file is part of ALMOS-MKH. |
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10 | * |
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11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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12 | * under the terms of the GNU General Public License as published by |
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13 | * the Free Software Foundation; version 2.0 of the License. |
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14 | * |
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15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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18 | * General Public License for more details. |
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19 | * |
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20 | * You should have received a copy of the GNU General Public License |
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21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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23 | */ |
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24 | |
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25 | #include <kernel_config.h> |
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26 | #include <hal_types.h> |
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27 | #include <hal_context.h> |
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28 | #include <hal_irqmask.h> |
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29 | #include <hal_special.h> |
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30 | #include <hal_remote.h> |
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31 | #include <memcpy.h> |
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32 | #include <printk.h> |
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33 | #include <cluster.h> |
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34 | #include <process.h> |
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35 | #include <scheduler.h> |
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36 | #include <dev_pic.h> |
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37 | #include <core.h> |
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38 | #include <list.h> |
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39 | #include <xlist.h> |
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40 | #include <page.h> |
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41 | #include <kmem.h> |
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42 | #include <ppm.h> |
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43 | #include <thread.h> |
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44 | |
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45 | ////////////////////////////////////////////////////////////////////////////////////// |
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46 | // Extern global variables |
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47 | ////////////////////////////////////////////////////////////////////////////////////// |
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48 | |
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49 | extern process_t process_zero; |
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50 | |
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51 | ////////////////////////////////////////////////////////////////////////////////////// |
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52 | // This function returns a printable string for the thread type. |
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53 | ////////////////////////////////////////////////////////////////////////////////////// |
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54 | char * thread_type_str( uint32_t type ) |
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55 | { |
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56 | if ( type == THREAD_USER ) return "USR"; |
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57 | else if( type == THREAD_RPC ) return "RPC"; |
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58 | else if( type == THREAD_DEV ) return "DEV"; |
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59 | else if( type == THREAD_IDLE ) return "IDL"; |
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60 | else return "undefined"; |
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61 | } |
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62 | |
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63 | ///////////////////////////////////////////////////////////////////////////////////// |
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64 | // This static function allocates physical memory for a thread descriptor. |
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65 | // It can be called by the three functions: |
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66 | // - thread_user_create() |
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67 | // - thread_user_fork() |
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68 | // - thread_kernel_create() |
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69 | ///////////////////////////////////////////////////////////////////////////////////// |
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70 | // @ return pointer on thread descriptor if success / return NULL if failure. |
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71 | ///////////////////////////////////////////////////////////////////////////////////// |
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72 | static thread_t * thread_alloc() |
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73 | { |
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74 | page_t * page; // pointer on page descriptor containing thread descriptor |
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75 | kmem_req_t req; // kmem request |
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76 | |
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77 | // allocates memory for thread descriptor + kernel stack |
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78 | req.type = KMEM_PAGE; |
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79 | req.size = CONFIG_THREAD_DESC_ORDER; |
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80 | req.flags = AF_KERNEL | AF_ZERO; |
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81 | page = kmem_alloc( &req ); |
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82 | |
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83 | if( page == NULL ) return NULL; |
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84 | |
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85 | // return pointer on new thread descriptor |
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86 | xptr_t base_xp = ppm_page2base( XPTR(local_cxy , page ) ); |
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87 | return (thread_t *)GET_PTR( base_xp ); |
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88 | |
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89 | } // end thread_alloc() |
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90 | |
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91 | |
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92 | ///////////////////////////////////////////////////////////////////////////////////// |
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93 | // This static function releases the physical memory for a thread descriptor. |
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94 | // It is called by the three functions: |
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95 | // - thread_user_create() |
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96 | // - thread_user_fork() |
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97 | // - thread_kernel_create() |
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98 | ///////////////////////////////////////////////////////////////////////////////////// |
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99 | // @ thread : pointer on thread descriptor. |
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100 | ///////////////////////////////////////////////////////////////////////////////////// |
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101 | static void thread_release( thread_t * thread ) |
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102 | { |
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103 | kmem_req_t req; |
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104 | |
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105 | xptr_t base_xp = ppm_base2page( XPTR(local_cxy , thread ) ); |
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106 | |
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107 | req.type = KMEM_PAGE; |
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108 | req.ptr = GET_PTR( base_xp ); |
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109 | kmem_free( &req ); |
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110 | } |
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111 | |
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112 | ///////////////////////////////////////////////////////////////////////////////////// |
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113 | // This static function initializes a thread descriptor (kernel or user). |
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114 | // It can be called by the four functions: |
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115 | // - thread_user_create() |
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116 | // - thread_user_fork() |
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117 | // - thread_kernel_create() |
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118 | // - thread_idle_init() |
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119 | // It updates the local DQDT. |
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120 | ///////////////////////////////////////////////////////////////////////////////////// |
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121 | // @ thread : pointer on thread descriptor |
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122 | // @ process : pointer on process descriptor. |
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123 | // @ type : thread type. |
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124 | // @ func : pointer on thread entry function. |
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125 | // @ args : pointer on thread entry function arguments. |
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126 | // @ core_lid : target core local index. |
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127 | // @ u_stack_base : stack base (user thread only) |
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128 | // @ u_stack_size : stack base (user thread only) |
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129 | ///////////////////////////////////////////////////////////////////////////////////// |
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130 | static error_t thread_init( thread_t * thread, |
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131 | process_t * process, |
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132 | thread_type_t type, |
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133 | void * func, |
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134 | void * args, |
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135 | lid_t core_lid, |
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136 | intptr_t u_stack_base, |
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137 | uint32_t u_stack_size ) |
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138 | { |
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139 | error_t error; |
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140 | trdid_t trdid; // allocated thread identifier |
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141 | |
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142 | cluster_t * local_cluster = LOCAL_CLUSTER; |
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143 | |
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144 | // register new thread in process descriptor, and get a TRDID |
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145 | error = process_register_thread( process, thread , &trdid ); |
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146 | |
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147 | if( error ) |
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148 | { |
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149 | printk("\n[ERROR] in %s : cannot get TRDID\n", __FUNCTION__ ); |
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150 | return EINVAL; |
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151 | } |
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152 | |
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153 | // compute thread descriptor size without kernel stack |
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154 | uint32_t desc_size = (intptr_t)(&thread->signature) - (intptr_t)thread + 4; |
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155 | |
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156 | // Initialize new thread descriptor |
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157 | thread->trdid = trdid; |
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158 | thread->type = type; |
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159 | thread->quantum = 0; // TODO |
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160 | thread->ticks_nr = 0; // TODO |
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161 | thread->time_last_check = 0; |
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162 | thread->core = &local_cluster->core_tbl[core_lid]; |
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163 | thread->process = process; |
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164 | |
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165 | thread->local_locks = 0; |
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166 | thread->remote_locks = 0; |
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167 | |
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168 | #if CONFIG_LOCKS_DEBUG |
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169 | list_root_init( &thread->locks_root ); |
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170 | xlist_root_init( XPTR( local_cxy , &thread->xlocks_root ) ); |
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171 | #endif |
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172 | |
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173 | thread->u_stack_base = u_stack_base; |
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174 | thread->u_stack_size = u_stack_size; |
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175 | thread->k_stack_base = (intptr_t)thread + desc_size; |
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176 | thread->k_stack_size = CONFIG_THREAD_DESC_SIZE - desc_size; |
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177 | |
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178 | thread->entry_func = func; // thread entry point |
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179 | thread->entry_args = args; // thread function arguments |
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180 | thread->flags = 0; // all flags reset |
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181 | thread->errno = 0; // no error detected |
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182 | thread->fork_user = 0; // no user defined placement for fork |
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183 | thread->fork_cxy = 0; // user defined target cluster for fork |
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184 | thread->blocked = THREAD_BLOCKED_GLOBAL; |
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185 | |
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186 | // reset sched list |
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187 | list_entry_init( &thread->sched_list ); |
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188 | |
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189 | // reset thread info |
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190 | memset( &thread->info , 0 , sizeof(thread_info_t) ); |
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191 | |
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192 | // initializes join_lock |
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193 | remote_spinlock_init( XPTR( local_cxy , &thread->join_lock ) ); |
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194 | |
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195 | // initialise signature |
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196 | thread->signature = THREAD_SIGNATURE; |
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197 | |
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198 | // FIXME call hal_thread_init() function to initialise the save_sr field |
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199 | thread->save_sr = 0xFF13; |
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200 | |
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201 | // register new thread in core scheduler |
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202 | sched_register_thread( thread->core , thread ); |
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203 | |
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204 | // update DQDT |
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205 | dqdt_update_threads( 1 ); |
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206 | |
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207 | return 0; |
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208 | |
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209 | } // end thread_init() |
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210 | |
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211 | ///////////////////////////////////////////////////////// |
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212 | error_t thread_user_create( pid_t pid, |
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213 | void * start_func, |
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214 | void * start_arg, |
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215 | pthread_attr_t * attr, |
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216 | thread_t ** new_thread ) |
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217 | { |
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218 | error_t error; |
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219 | thread_t * thread; // pointer on created thread descriptor |
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220 | process_t * process; // pointer to local process descriptor |
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221 | lid_t core_lid; // selected core local index |
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222 | vseg_t * vseg; // stack vseg |
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223 | |
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224 | assert( (attr != NULL) , __FUNCTION__, "pthread attributes must be defined" ); |
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225 | |
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226 | #if DEBUG_THREAD_USER_CREATE |
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227 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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228 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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229 | printk("\n[DBG] %s : thread %x enter / process %x / cycle %d\n", |
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230 | __FUNCTION__, CURRENT_THREAD, pid , cycle ); |
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231 | #endif |
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232 | |
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233 | // get process descriptor local copy |
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234 | process = process_get_local_copy( pid ); |
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235 | |
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236 | if( process == NULL ) |
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237 | { |
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238 | printk("\n[ERROR] in %s : cannot get process descriptor %x\n", |
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239 | __FUNCTION__ , pid ); |
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240 | return ENOMEM; |
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241 | } |
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242 | |
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243 | // select a target core in local cluster |
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244 | if( attr->attributes & PT_ATTR_CORE_DEFINED ) |
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245 | { |
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246 | core_lid = attr->lid; |
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247 | if( core_lid >= LOCAL_CLUSTER->cores_nr ) |
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248 | { |
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249 | printk("\n[ERROR] in %s : illegal core index attribute = %d\n", |
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250 | __FUNCTION__ , core_lid ); |
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251 | return EINVAL; |
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252 | } |
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253 | } |
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254 | else |
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255 | { |
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256 | core_lid = cluster_select_local_core(); |
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257 | } |
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258 | |
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259 | // allocate a stack from local VMM |
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260 | vseg = vmm_create_vseg( process, |
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261 | VSEG_TYPE_STACK, |
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262 | 0, // size unused |
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263 | 0, // length unused |
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264 | 0, // file_offset unused |
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265 | 0, // file_size unused |
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266 | XPTR_NULL, // mapper_xp unused |
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267 | local_cxy ); |
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268 | |
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269 | if( vseg == NULL ) |
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270 | { |
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271 | printk("\n[ERROR] in %s : cannot create stack vseg\n", __FUNCTION__ ); |
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272 | return ENOMEM; |
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273 | } |
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274 | |
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275 | // allocate memory for thread descriptor |
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276 | thread = thread_alloc(); |
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277 | |
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278 | if( thread == NULL ) |
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279 | { |
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280 | printk("\n[ERROR] in %s : cannot create new thread\n", __FUNCTION__ ); |
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281 | vmm_remove_vseg( vseg ); |
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282 | return ENOMEM; |
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283 | } |
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284 | |
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285 | // initialize thread descriptor |
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286 | error = thread_init( thread, |
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287 | process, |
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288 | THREAD_USER, |
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289 | start_func, |
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290 | start_arg, |
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291 | core_lid, |
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292 | vseg->min, |
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293 | vseg->max - vseg->min ); |
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294 | if( error ) |
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295 | { |
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296 | printk("\n[ERROR] in %s : cannot initialize new thread\n", __FUNCTION__ ); |
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297 | vmm_remove_vseg( vseg ); |
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298 | thread_release( thread ); |
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299 | return EINVAL; |
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300 | } |
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301 | |
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302 | // set DETACHED flag if required |
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303 | if( attr->attributes & PT_ATTR_DETACH ) |
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304 | { |
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305 | thread->flags |= THREAD_FLAG_DETACHED; |
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306 | } |
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307 | |
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308 | // allocate & initialize CPU context |
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309 | if( hal_cpu_context_create( thread ) ) |
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310 | { |
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311 | printk("\n[ERROR] in %s : cannot create CPU context\n", __FUNCTION__ ); |
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312 | vmm_remove_vseg( vseg ); |
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313 | thread_release( thread ); |
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314 | return ENOMEM; |
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315 | } |
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316 | |
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317 | // allocate FPU context |
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318 | if( hal_fpu_context_alloc( thread ) ) |
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319 | { |
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320 | printk("\n[ERROR] in %s : cannot create FPU context\n", __FUNCTION__ ); |
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321 | vmm_remove_vseg( vseg ); |
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322 | thread_release( thread ); |
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323 | return ENOMEM; |
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324 | } |
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325 | |
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326 | #if DEBUG_THREAD_USER_CREATE |
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327 | cycle = (uint32_t)hal_get_cycles(); |
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328 | if( DEBUG_THREAD_USER_CREATE < cycle ) |
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329 | printk("\n[DBG] %s : thread %x exit / process %x / new_thread %x / core %d / cycle %d\n", |
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330 | __FUNCTION__, CURRENT_THREAD, pid, thread, core_lid, cycle ); |
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331 | #endif |
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332 | |
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333 | *new_thread = thread; |
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334 | return 0; |
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335 | |
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336 | } // end thread_user_create() |
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337 | |
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338 | /////////////////////////////////////////////////////// |
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339 | error_t thread_user_fork( xptr_t parent_thread_xp, |
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340 | process_t * child_process, |
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341 | thread_t ** child_thread ) |
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342 | { |
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343 | error_t error; |
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344 | thread_t * child_ptr; // local pointer on local child thread |
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345 | lid_t core_lid; // selected core local index |
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346 | |
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347 | thread_t * parent_ptr; // local pointer on remote parent thread |
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348 | cxy_t parent_cxy; // parent thread cluster |
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349 | process_t * parent_process; // local pointer on parent process |
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350 | xptr_t parent_gpt_xp; // extended pointer on parent thread GPT |
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351 | |
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352 | void * func; // parent thread entry_func |
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353 | void * args; // parent thread entry_args |
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354 | intptr_t base; // parent thread u_stack_base |
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355 | uint32_t size; // parent thread u_stack_size |
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356 | uint32_t flags; // parent_thread flags |
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357 | vpn_t vpn_base; // parent thread stack vpn_base |
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358 | vpn_t vpn_size; // parent thread stack vpn_size |
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359 | reg_t * uzone; // parent thread pointer on uzone |
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360 | |
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361 | vseg_t * vseg; // child thread STACK vseg |
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362 | |
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363 | #if DEBUG_THREAD_USER_FORK |
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364 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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365 | if( DEBUG_THREAD_USER_FORK < cycle ) |
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366 | printk("\n[DBG] %s : thread %x enter / child_process %x / cycle %d\n", |
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367 | __FUNCTION__, CURRENT_THREAD, child_process->pid, cycle ); |
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368 | #endif |
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369 | |
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370 | // select a target core in local cluster |
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371 | core_lid = cluster_select_local_core(); |
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372 | |
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373 | // get cluster and local pointer on parent thread descriptor |
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374 | parent_cxy = GET_CXY( parent_thread_xp ); |
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375 | parent_ptr = (thread_t *)GET_PTR( parent_thread_xp ); |
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376 | |
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377 | // get relevant fields from parent thread |
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378 | func = (void *) hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->entry_func )); |
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379 | args = (void *) hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->entry_args )); |
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380 | base = (intptr_t)hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->u_stack_base )); |
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381 | size = (uint32_t)hal_remote_lw ( XPTR( parent_cxy , &parent_ptr->u_stack_size )); |
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382 | flags = hal_remote_lw ( XPTR( parent_cxy , &parent_ptr->flags )); |
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383 | uzone = (reg_t *) hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->uzone_current )); |
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384 | |
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385 | vpn_base = base >> CONFIG_PPM_PAGE_SHIFT; |
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386 | vpn_size = size >> CONFIG_PPM_PAGE_SHIFT; |
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387 | |
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388 | // get pointer on parent process in parent thread cluster |
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389 | parent_process = (process_t *)hal_remote_lpt( XPTR( parent_cxy, |
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390 | &parent_ptr->process ) ); |
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391 | |
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392 | // get extended pointer on parent GPT in parent thread cluster |
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393 | parent_gpt_xp = XPTR( parent_cxy , &parent_process->vmm.gpt ); |
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394 | |
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395 | // allocate memory for child thread descriptor |
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396 | child_ptr = thread_alloc(); |
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397 | if( child_ptr == NULL ) |
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398 | { |
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399 | printk("\n[ERROR] in %s : cannot allocate new thread\n", __FUNCTION__ ); |
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400 | return -1; |
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401 | } |
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402 | |
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403 | // initialize thread descriptor |
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404 | error = thread_init( child_ptr, |
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405 | child_process, |
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406 | THREAD_USER, |
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407 | func, |
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408 | args, |
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409 | core_lid, |
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410 | base, |
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411 | size ); |
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412 | if( error ) |
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413 | { |
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414 | printk("\n[ERROR] in %s : cannot initialize child thread\n", __FUNCTION__ ); |
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415 | thread_release( child_ptr ); |
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416 | return EINVAL; |
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417 | } |
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418 | |
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419 | // return child pointer |
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420 | *child_thread = child_ptr; |
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421 | |
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422 | // set detached flag if required |
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423 | if( flags & THREAD_FLAG_DETACHED ) child_ptr->flags = THREAD_FLAG_DETACHED; |
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424 | |
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425 | // update uzone pointer in child thread descriptor |
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426 | child_ptr->uzone_current = (char *)((intptr_t)uzone + |
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427 | (intptr_t)child_ptr - |
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428 | (intptr_t)parent_ptr ); |
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429 | |
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430 | |
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431 | // allocate CPU context for child thread |
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432 | if( hal_cpu_context_alloc( child_ptr ) ) |
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433 | { |
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434 | printk("\n[ERROR] in %s : cannot allocate CPU context\n", __FUNCTION__ ); |
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435 | thread_release( child_ptr ); |
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436 | return -1; |
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437 | } |
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438 | |
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439 | // allocate FPU context for child thread |
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440 | if( hal_fpu_context_alloc( child_ptr ) ) |
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441 | { |
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442 | printk("\n[ERROR] in %s : cannot allocate FPU context\n", __FUNCTION__ ); |
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443 | thread_release( child_ptr ); |
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444 | return -1; |
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445 | } |
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446 | |
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447 | // create and initialize STACK vseg |
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448 | vseg = vseg_alloc(); |
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449 | vseg_init( vseg, |
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450 | VSEG_TYPE_STACK, |
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451 | base, |
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452 | size, |
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453 | vpn_base, |
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454 | vpn_size, |
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455 | 0, 0, XPTR_NULL, // not a file vseg |
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456 | local_cxy ); |
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457 | |
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458 | // register STACK vseg in local child VSL |
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459 | vseg_attach( &child_process->vmm , vseg ); |
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460 | |
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461 | // copy all valid STACK GPT entries |
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462 | vpn_t vpn; |
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463 | bool_t mapped; |
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464 | ppn_t ppn; |
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465 | for( vpn = vpn_base ; vpn < (vpn_base + vpn_size) ; vpn++ ) |
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466 | { |
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467 | error = hal_gpt_pte_copy( &child_process->vmm.gpt, |
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468 | parent_gpt_xp, |
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469 | vpn, |
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470 | true, // set cow |
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471 | &ppn, |
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472 | &mapped ); |
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473 | if( error ) |
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474 | { |
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475 | vseg_detach( &child_process->vmm , vseg ); |
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476 | vseg_free( vseg ); |
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477 | thread_release( child_ptr ); |
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478 | printk("\n[ERROR] in %s : cannot update child GPT\n", __FUNCTION__ ); |
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479 | return -1; |
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480 | } |
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481 | |
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482 | // increment pending forks counter for the page if mapped |
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483 | if( mapped ) |
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484 | { |
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485 | xptr_t page_xp = ppm_ppn2page( ppn ); |
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486 | cxy_t page_cxy = GET_CXY( page_xp ); |
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487 | page_t * page_ptr = (page_t *)GET_PTR( page_xp ); |
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488 | hal_remote_atomic_add( XPTR( page_cxy , &page_ptr->forks ) , 1 ); |
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489 | |
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490 | #if (DEBUG_THREAD_USER_FORK & 1) |
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491 | cycle = (uint32_t)hal_get_cycles(); |
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492 | if( DEBUG_THREAD_USER_FORK < cycle ) |
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493 | printk("\n[DBG] %s : thread %x copied stack PTE to child GPT : vpn %x\n", |
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494 | __FUNCTION__, CURRENT_THREAD, vpn ); |
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495 | #endif |
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496 | |
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497 | } |
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498 | } |
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499 | |
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500 | // set COW flag for all mapped entries of STAK vseg in parent thread GPT |
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501 | hal_gpt_set_cow( parent_gpt_xp, |
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502 | vpn_base, |
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503 | vpn_size ); |
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504 | |
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505 | #if DEBUG_THREAD_USER_FORK |
---|
506 | cycle = (uint32_t)hal_get_cycles(); |
---|
507 | if( DEBUG_THREAD_USER_FORK < cycle ) |
---|
508 | printk("\n[DBG] %s : thread %x exit / child_process %x / child_thread %x / cycle %d\n", |
---|
509 | __FUNCTION__, CURRENT_THREAD, child_process->pid, child_ptr, cycle ); |
---|
510 | #endif |
---|
511 | |
---|
512 | return 0; |
---|
513 | |
---|
514 | } // end thread_user_fork() |
---|
515 | |
---|
516 | ///////////////////////////////////////////////////////// |
---|
517 | error_t thread_kernel_create( thread_t ** new_thread, |
---|
518 | thread_type_t type, |
---|
519 | void * func, |
---|
520 | void * args, |
---|
521 | lid_t core_lid ) |
---|
522 | { |
---|
523 | error_t error; |
---|
524 | thread_t * thread; // pointer on new thread descriptor |
---|
525 | |
---|
526 | assert( ( (type == THREAD_IDLE) || (type == THREAD_RPC) || (type == THREAD_DEV) ) , |
---|
527 | __FUNCTION__ , "illegal thread type" ); |
---|
528 | |
---|
529 | assert( (core_lid < LOCAL_CLUSTER->cores_nr) , |
---|
530 | __FUNCTION__ , "illegal core_lid" ); |
---|
531 | |
---|
532 | #if DEBUG_THREAD_KERNEL_CREATE |
---|
533 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
534 | if( DEBUG_THREAD_KERNEL_CREATE < cycle ) |
---|
535 | printk("\n[DBG] %s : thread %x enter / requested_type %s / cycle %d\n", |
---|
536 | __FUNCTION__, CURRENT_THREAD, thread, thread_type_str(type), cycle ); |
---|
537 | #endif |
---|
538 | |
---|
539 | // allocate memory for new thread descriptor |
---|
540 | thread = thread_alloc(); |
---|
541 | |
---|
542 | if( thread == NULL ) return ENOMEM; |
---|
543 | |
---|
544 | // initialize thread descriptor |
---|
545 | error = thread_init( thread, |
---|
546 | &process_zero, |
---|
547 | type, |
---|
548 | func, |
---|
549 | args, |
---|
550 | core_lid, |
---|
551 | 0 , 0 ); // no user stack for a kernel thread |
---|
552 | |
---|
553 | if( error ) // release allocated memory for thread descriptor |
---|
554 | { |
---|
555 | thread_release( thread ); |
---|
556 | return EINVAL; |
---|
557 | } |
---|
558 | |
---|
559 | // allocate & initialize CPU context |
---|
560 | hal_cpu_context_create( thread ); |
---|
561 | |
---|
562 | #if DEBUG_THREAD_KERNEL_CREATE |
---|
563 | cycle = (uint32_t)hal_get_cycles(); |
---|
564 | if( DEBUG_THREAD_KERNEL_CREATE < cycle ) |
---|
565 | printk("\n[DBG] %s : thread %x exit / new_thread %x / type %s / cycle %d\n", |
---|
566 | __FUNCTION__, CURRENT_THREAD, thread, thread_type_str(type), cycle ); |
---|
567 | #endif |
---|
568 | |
---|
569 | *new_thread = thread; |
---|
570 | return 0; |
---|
571 | |
---|
572 | } // end thread_kernel_create() |
---|
573 | |
---|
574 | ///////////////////////////////////////////////// |
---|
575 | error_t thread_idle_init( thread_t * thread, |
---|
576 | thread_type_t type, |
---|
577 | void * func, |
---|
578 | void * args, |
---|
579 | lid_t core_lid ) |
---|
580 | { |
---|
581 | assert( (type == THREAD_IDLE) , __FUNCTION__ , "illegal thread type" ); |
---|
582 | |
---|
583 | assert( (core_lid < LOCAL_CLUSTER->cores_nr) , __FUNCTION__ , "illegal core index" ); |
---|
584 | |
---|
585 | error_t error = thread_init( thread, |
---|
586 | &process_zero, |
---|
587 | type, |
---|
588 | func, |
---|
589 | args, |
---|
590 | core_lid, |
---|
591 | 0 , 0 ); // no user stack for a kernel thread |
---|
592 | |
---|
593 | // allocate & initialize CPU context if success |
---|
594 | if( error == 0 ) hal_cpu_context_create( thread ); |
---|
595 | |
---|
596 | return error; |
---|
597 | |
---|
598 | } // end thread_idle_init() |
---|
599 | |
---|
600 | /////////////////////////////////////////////////////////////////////////////////////// |
---|
601 | // TODO: check that all memory dynamically allocated during thread execution |
---|
602 | // has been released, using a cache of mmap requests. [AG] |
---|
603 | /////////////////////////////////////////////////////////////////////////////////////// |
---|
604 | void thread_destroy( thread_t * thread ) |
---|
605 | { |
---|
606 | reg_t save_sr; |
---|
607 | |
---|
608 | process_t * process = thread->process; |
---|
609 | core_t * core = thread->core; |
---|
610 | |
---|
611 | #if DEBUG_THREAD_DESTROY |
---|
612 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
613 | if( DEBUG_THREAD_DESTROY < cycle ) |
---|
614 | printk("\n[DBG] %s : thread %x enter to destroy thread %x in process %x / cycle %d\n", |
---|
615 | __FUNCTION__, CURRENT_THREAD, thread, process->pid, cycle ); |
---|
616 | #endif |
---|
617 | |
---|
618 | assert( (thread->local_locks == 0) , __FUNCTION__ , "all local locks not released" ); |
---|
619 | |
---|
620 | assert( (thread->remote_locks == 0) , __FUNCTION__ , "all remote locks not released" ); |
---|
621 | |
---|
622 | // update intrumentation values |
---|
623 | process->vmm.pgfault_nr += thread->info.pgfault_nr; |
---|
624 | |
---|
625 | // release memory allocated for CPU context and FPU context |
---|
626 | hal_cpu_context_destroy( thread ); |
---|
627 | if ( thread->type == THREAD_USER ) hal_fpu_context_destroy( thread ); |
---|
628 | |
---|
629 | // release FPU ownership if required |
---|
630 | hal_disable_irq( &save_sr ); |
---|
631 | if( core->fpu_owner == thread ) |
---|
632 | { |
---|
633 | core->fpu_owner = NULL; |
---|
634 | hal_fpu_disable(); |
---|
635 | } |
---|
636 | hal_restore_irq( save_sr ); |
---|
637 | |
---|
638 | // remove thread from process th_tbl[] |
---|
639 | process_remove_thread( thread ); |
---|
640 | |
---|
641 | // update DQDT |
---|
642 | dqdt_update_threads( -1 ); |
---|
643 | |
---|
644 | // invalidate thread descriptor |
---|
645 | thread->signature = 0; |
---|
646 | |
---|
647 | // release memory for thread descriptor |
---|
648 | thread_release( thread ); |
---|
649 | |
---|
650 | #if DEBUG_THREAD_DESTROY |
---|
651 | cycle = (uint32_t)hal_get_cycles(); |
---|
652 | if( DEBUG_THREAD_DESTROY < cycle ) |
---|
653 | printk("\n[DBG] %s : thread %x exit / destroyed thread %x in process %x / cycle %d\n", |
---|
654 | __FUNCTION__, CURRENT_THREAD, thread, process->pid, cycle ); |
---|
655 | #endif |
---|
656 | |
---|
657 | } // end thread_destroy() |
---|
658 | |
---|
659 | ////////////////////////////////////////////////// |
---|
660 | inline void thread_set_req_ack( thread_t * target, |
---|
661 | uint32_t * rsp_count ) |
---|
662 | { |
---|
663 | reg_t save_sr; // for critical section |
---|
664 | |
---|
665 | // get pointer on target thread scheduler |
---|
666 | scheduler_t * sched = &target->core->scheduler; |
---|
667 | |
---|
668 | // wait scheduler ready to handle a new request |
---|
669 | while( sched->req_ack_pending ) asm volatile( "nop" ); |
---|
670 | |
---|
671 | // enter critical section |
---|
672 | hal_disable_irq( &save_sr ); |
---|
673 | |
---|
674 | // set request in target thread scheduler |
---|
675 | sched->req_ack_pending = true; |
---|
676 | |
---|
677 | // set ack request in target thread "flags" |
---|
678 | hal_atomic_or( &target->flags , THREAD_FLAG_REQ_ACK ); |
---|
679 | |
---|
680 | // set pointer on responses counter in target thread |
---|
681 | target->ack_rsp_count = rsp_count; |
---|
682 | |
---|
683 | // exit critical section |
---|
684 | hal_restore_irq( save_sr ); |
---|
685 | |
---|
686 | hal_fence(); |
---|
687 | |
---|
688 | } // thread_set_req_ack() |
---|
689 | |
---|
690 | ///////////////////////////////////////////////////// |
---|
691 | inline void thread_reset_req_ack( thread_t * target ) |
---|
692 | { |
---|
693 | reg_t save_sr; // for critical section |
---|
694 | |
---|
695 | // get pointer on target thread scheduler |
---|
696 | scheduler_t * sched = &target->core->scheduler; |
---|
697 | |
---|
698 | // check signal pending in scheduler |
---|
699 | assert( sched->req_ack_pending , __FUNCTION__ , "no pending signal" ); |
---|
700 | |
---|
701 | // enter critical section |
---|
702 | hal_disable_irq( &save_sr ); |
---|
703 | |
---|
704 | // reset signal in scheduler |
---|
705 | sched->req_ack_pending = false; |
---|
706 | |
---|
707 | // reset signal in thread "flags" |
---|
708 | hal_atomic_and( &target->flags , ~THREAD_FLAG_REQ_ACK ); |
---|
709 | |
---|
710 | // reset pointer on responses counter |
---|
711 | target->ack_rsp_count = NULL; |
---|
712 | |
---|
713 | // exit critical section |
---|
714 | hal_restore_irq( save_sr ); |
---|
715 | |
---|
716 | hal_fence(); |
---|
717 | |
---|
718 | } // thread_reset_req_ack() |
---|
719 | |
---|
720 | //////////////////////////////// |
---|
721 | inline bool_t thread_can_yield() |
---|
722 | { |
---|
723 | thread_t * this = CURRENT_THREAD; |
---|
724 | return (this->local_locks == 0) && (this->remote_locks == 0); |
---|
725 | } |
---|
726 | |
---|
727 | ///////////////////////// |
---|
728 | void thread_check_sched() |
---|
729 | { |
---|
730 | thread_t * this = CURRENT_THREAD; |
---|
731 | |
---|
732 | if( (this->local_locks == 0) && |
---|
733 | (this->remote_locks == 0) && |
---|
734 | (this->flags & THREAD_FLAG_SCHED) ) |
---|
735 | { |
---|
736 | this->flags &= ~THREAD_FLAG_SCHED; |
---|
737 | sched_yield( "delayed scheduling" ); |
---|
738 | } |
---|
739 | |
---|
740 | } // end thread_check_sched() |
---|
741 | |
---|
742 | ////////////////////////////////////// |
---|
743 | void thread_block( xptr_t thread_xp, |
---|
744 | uint32_t cause ) |
---|
745 | { |
---|
746 | // get thread cluster and local pointer |
---|
747 | cxy_t cxy = GET_CXY( thread_xp ); |
---|
748 | thread_t * ptr = GET_PTR( thread_xp ); |
---|
749 | |
---|
750 | // set blocking cause |
---|
751 | hal_remote_atomic_or( XPTR( cxy , &ptr->blocked ) , cause ); |
---|
752 | hal_fence(); |
---|
753 | |
---|
754 | #if DEBUG_THREAD_BLOCK |
---|
755 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
756 | if( DEBUG_THREAD_BLOCK < cycle ) |
---|
757 | printk("\n[DBG] %s : thread %x blocked thread %x / cause %x / cycle %d\n", |
---|
758 | __FUNCTION__ , CURRENT_THREAD , ptr , cause , cycle ); |
---|
759 | #endif |
---|
760 | |
---|
761 | #if (DEBUG_THREAD_BLOCK & 1) |
---|
762 | if( DEBUG_THREAD_BLOCK < cycle ) |
---|
763 | sched_display( ptr->core->lid ); |
---|
764 | #endif |
---|
765 | |
---|
766 | } // end thread_block() |
---|
767 | |
---|
768 | //////////////////////////////////////////// |
---|
769 | uint32_t thread_unblock( xptr_t thread_xp, |
---|
770 | uint32_t cause ) |
---|
771 | { |
---|
772 | // get thread cluster and local pointer |
---|
773 | cxy_t cxy = GET_CXY( thread_xp ); |
---|
774 | thread_t * ptr = GET_PTR( thread_xp ); |
---|
775 | |
---|
776 | // reset blocking cause |
---|
777 | uint32_t previous = hal_remote_atomic_and( XPTR( cxy , &ptr->blocked ) , ~cause ); |
---|
778 | hal_fence(); |
---|
779 | |
---|
780 | #if DEBUG_THREAD_BLOCK |
---|
781 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
782 | if( DEBUG_THREAD_BLOCK < cycle ) |
---|
783 | printk("\n[DBG] %s : thread %x unblocked thread %x / cause %x / cycle %d\n", |
---|
784 | __FUNCTION__ , CURRENT_THREAD , ptr , cause , cycle ); |
---|
785 | #endif |
---|
786 | |
---|
787 | #if (DEBUG_THREAD_BLOCK & 1) |
---|
788 | if( DEBUG_THREAD_BLOCK < cycle ) |
---|
789 | sched_display( ptr->core->lid ); |
---|
790 | #endif |
---|
791 | |
---|
792 | // return a non zero value if the cause bit is modified |
---|
793 | return( previous & cause ); |
---|
794 | |
---|
795 | } // end thread_unblock() |
---|
796 | |
---|
797 | /* |
---|
798 | |
---|
799 | //////////////////////////////////// |
---|
800 | void thread_kill( xptr_t target_xp, |
---|
801 | bool_t is_exit, |
---|
802 | bool_t is_forced ) |
---|
803 | { |
---|
804 | reg_t save_sr; // for critical section |
---|
805 | bool_t attached; // target thread in attached mode |
---|
806 | bool_t join_done; // joining thread arrived first |
---|
807 | xptr_t killer_xp; // extended pointer on killer thread (this) |
---|
808 | thread_t * killer_ptr; // pointer on killer thread (this) |
---|
809 | cxy_t target_cxy; // target thread cluster |
---|
810 | thread_t * target_ptr; // pointer on target thread |
---|
811 | xptr_t joining_xp; // extended pointer on joining thread |
---|
812 | thread_t * joining_ptr; // pointer on joining thread |
---|
813 | cxy_t joining_cxy; // joining thread cluster |
---|
814 | pid_t target_pid; // target process PID |
---|
815 | cxy_t owner_cxy; // target process owner cluster |
---|
816 | trdid_t target_trdid; // target thread identifier |
---|
817 | ltid_t target_ltid; // target thread local index |
---|
818 | xptr_t process_state_xp; // extended pointer on <term_state> in process |
---|
819 | |
---|
820 | xptr_t target_flags_xp; // extended pointer on target thread <flags> |
---|
821 | xptr_t target_join_lock_xp; // extended pointer on target thread <join_lock> |
---|
822 | xptr_t target_join_xp_xp; // extended pointer on target thread <join_xp> |
---|
823 | xptr_t target_process_xp; // extended pointer on target thread <process> |
---|
824 | |
---|
825 | process_t * target_process; // pointer on target thread process |
---|
826 | |
---|
827 | // get target thread pointer and cluster |
---|
828 | target_cxy = GET_CXY( target_xp ); |
---|
829 | target_ptr = GET_PTR( target_xp ); |
---|
830 | |
---|
831 | // get killer thread pointers |
---|
832 | killer_ptr = CURRENT_THREAD; |
---|
833 | killer_xp = XPTR( local_cxy , killer_ptr ); |
---|
834 | |
---|
835 | #if DEBUG_THREAD_DELETE |
---|
836 | uint32_t cycle = (uint32_t)hal_get_cycles; |
---|
837 | if( DEBUG_THREAD_DELETE < cycle ) |
---|
838 | printk("\n[DBG] %s : thread %x enter for target thread %x / cycle %d\n", |
---|
839 | __FUNCTION__, killer_ptr, target_ptr, cycle ); |
---|
840 | #endif |
---|
841 | |
---|
842 | // block the target thread |
---|
843 | thread_block( target_xp , THREAD_BLOCKED_GLOBAL ); |
---|
844 | |
---|
845 | // get target thread attached mode |
---|
846 | target_flags_xp = XPTR( target_cxy , &target_ptr->flags ); |
---|
847 | attached = ((hal_remote_lw( target_flags_xp ) & THREAD_FLAG_DETACHED) == 0); |
---|
848 | |
---|
849 | // synchronize with the joining thread |
---|
850 | // if the target thread is attached && not forced |
---|
851 | |
---|
852 | if( attached && (is_forced == false) ) |
---|
853 | { |
---|
854 | // build extended pointers on target thread join fields |
---|
855 | target_join_lock_xp = XPTR( target_cxy , &target_ptr->join_lock ); |
---|
856 | target_join_xp_xp = XPTR( target_cxy , &target_ptr->join_xp ); |
---|
857 | |
---|
858 | // enter critical section |
---|
859 | hal_disable_irq( &save_sr ); |
---|
860 | |
---|
861 | // take the join_lock in target thread descriptor |
---|
862 | remote_spinlock_lock( target_join_lock_xp ); |
---|
863 | |
---|
864 | // get join_done from target thread descriptor |
---|
865 | join_done = ((hal_remote_lw( target_flags_xp ) & THREAD_FLAG_JOIN_DONE) != 0); |
---|
866 | |
---|
867 | if( join_done ) // joining thread arrived first |
---|
868 | { |
---|
869 | // get extended pointer on joining thread |
---|
870 | joining_xp = (xptr_t)hal_remote_lwd( target_join_xp_xp ); |
---|
871 | joining_ptr = GET_PTR( joining_xp ); |
---|
872 | joining_cxy = GET_CXY( joining_xp ); |
---|
873 | |
---|
874 | // reset the join_done flag in target thread |
---|
875 | hal_remote_atomic_and( target_flags_xp , ~THREAD_FLAG_JOIN_DONE ); |
---|
876 | |
---|
877 | // unblock the joining thread |
---|
878 | thread_unblock( joining_xp , THREAD_BLOCKED_JOIN ); |
---|
879 | |
---|
880 | // release the join_lock in target thread descriptor |
---|
881 | remote_spinlock_unlock( target_join_lock_xp ); |
---|
882 | |
---|
883 | // restore IRQs |
---|
884 | hal_restore_irq( save_sr ); |
---|
885 | } |
---|
886 | else // this thread arrived first |
---|
887 | { |
---|
888 | // set the kill_done flag in target thread |
---|
889 | hal_remote_atomic_or( target_flags_xp , THREAD_FLAG_KILL_DONE ); |
---|
890 | |
---|
891 | // block this thread on BLOCKED_JOIN |
---|
892 | thread_block( killer_xp , THREAD_BLOCKED_JOIN ); |
---|
893 | |
---|
894 | // set extended pointer on killer thread in target thread |
---|
895 | hal_remote_swd( target_join_xp_xp , killer_xp ); |
---|
896 | |
---|
897 | // release the join_lock in target thread descriptor |
---|
898 | remote_spinlock_unlock( target_join_lock_xp ); |
---|
899 | |
---|
900 | // deschedule |
---|
901 | sched_yield( "killer thread wait joining thread" ); |
---|
902 | |
---|
903 | // restore IRQs |
---|
904 | hal_restore_irq( save_sr ); |
---|
905 | } |
---|
906 | } // end if attached |
---|
907 | |
---|
908 | // - if the target thread is the main thread |
---|
909 | // => synchronize with the parent process main thread |
---|
910 | // - if the target thread is not the main thread |
---|
911 | // => simply mark the target thread for delete |
---|
912 | |
---|
913 | // get pointer on target thread process |
---|
914 | target_process_xp = XPTR( target_cxy , &target_ptr->process ); |
---|
915 | target_process = (process_t *)hal_remote_lpt( target_process_xp ); |
---|
916 | |
---|
917 | // get target process owner cluster |
---|
918 | target_pid = hal_remote_lw( XPTR( target_cxy , &target_process->pid ) ); |
---|
919 | owner_cxy = CXY_FROM_PID( target_pid ); |
---|
920 | |
---|
921 | // get target thread local index |
---|
922 | target_trdid = hal_remote_lw( XPTR( target_cxy , &target_ptr->trdid ) ); |
---|
923 | target_ltid = LTID_FROM_TRDID( target_trdid ); |
---|
924 | |
---|
925 | if( (owner_cxy == target_cxy) && (target_ltid == 0) ) // main thread |
---|
926 | { |
---|
927 | // get extended pointer on term_state in target process owner cluster |
---|
928 | process_state_xp = XPTR( owner_cxy , &target_process->term_state ); |
---|
929 | |
---|
930 | // set termination info in target process owner |
---|
931 | if( is_exit ) hal_remote_atomic_or( process_state_xp , PROCESS_TERM_EXIT ); |
---|
932 | else hal_remote_atomic_or( process_state_xp , PROCESS_TERM_KILL ); |
---|
933 | |
---|
934 | #if DEBUG_THREAD_DELETE |
---|
935 | cycle = (uint32_t)hal_get_cycles; |
---|
936 | if( DEBUG_THREAD_DELETE < cycle ) |
---|
937 | printk("\n[DBG] %s : thread %x exit for thread %x / main thread / cycle %d\n", |
---|
938 | __FUNCTION__, killer_ptr, target_ptr, cycle ); |
---|
939 | #endif |
---|
940 | |
---|
941 | } |
---|
942 | else // main thread |
---|
943 | { |
---|
944 | // set the REQ_DELETE flag in target thread descriptor |
---|
945 | hal_remote_atomic_or( target_flags_xp , THREAD_FLAG_REQ_DELETE ); |
---|
946 | |
---|
947 | #if DEBUG_THREAD_DELETE |
---|
948 | cycle = (uint32_t)hal_get_cycles; |
---|
949 | if( DEBUG_THREAD_DELETE < cycle ) |
---|
950 | printk("\n[DBG] %s : thread %x exit for thread %x / not the main thread / cycle %d\n", |
---|
951 | __FUNCTION__, killer_ptr, target_ptr, cycle ); |
---|
952 | #endif |
---|
953 | |
---|
954 | } |
---|
955 | |
---|
956 | } // end thread_kill() |
---|
957 | |
---|
958 | */ |
---|
959 | |
---|
960 | ////////////////////////////////////// |
---|
961 | void thread_delete( xptr_t target_xp, |
---|
962 | pid_t pid, |
---|
963 | bool_t is_forced ) |
---|
964 | { |
---|
965 | reg_t save_sr; // for critical section |
---|
966 | bool_t target_join_done; // joining thread arrived first |
---|
967 | bool_t target_attached; // target thread attached |
---|
968 | xptr_t killer_xp; // extended pointer on killer thread (this) |
---|
969 | thread_t * killer_ptr; // pointer on killer thread (this) |
---|
970 | cxy_t target_cxy; // target thread cluster |
---|
971 | thread_t * target_ptr; // pointer on target thread |
---|
972 | xptr_t target_flags_xp; // extended pointer on target thread <flags> |
---|
973 | uint32_t target_flags; // target thread <flags> value |
---|
974 | xptr_t target_join_lock_xp; // extended pointer on target thread <join_lock> |
---|
975 | xptr_t target_join_xp_xp; // extended pointer on target thread <join_xp> |
---|
976 | trdid_t target_trdid; // target thread identifier |
---|
977 | ltid_t target_ltid; // target thread local index |
---|
978 | xptr_t joining_xp; // extended pointer on joining thread |
---|
979 | thread_t * joining_ptr; // pointer on joining thread |
---|
980 | cxy_t joining_cxy; // joining thread cluster |
---|
981 | cxy_t owner_cxy; // process owner cluster |
---|
982 | |
---|
983 | |
---|
984 | // get target thread pointers, identifiers, and flags |
---|
985 | target_cxy = GET_CXY( target_xp ); |
---|
986 | target_ptr = GET_PTR( target_xp ); |
---|
987 | target_trdid = hal_remote_lw( XPTR( target_cxy , &target_ptr->trdid ) ); |
---|
988 | target_ltid = LTID_FROM_TRDID( target_trdid ); |
---|
989 | target_flags_xp = XPTR( target_cxy , &target_ptr->flags ); |
---|
990 | target_flags = hal_remote_lw( target_flags_xp ); |
---|
991 | |
---|
992 | // get killer thread pointers |
---|
993 | killer_ptr = CURRENT_THREAD; |
---|
994 | killer_xp = XPTR( local_cxy , killer_ptr ); |
---|
995 | |
---|
996 | #if DEBUG_THREAD_DELETE |
---|
997 | uint32_t cycle = (uint32_t)hal_get_cycles; |
---|
998 | if( DEBUG_THREAD_DELETE < cycle ) |
---|
999 | printk("\n[DBG] %s : killer thread %x enter for target thread %x / cycle %d\n", |
---|
1000 | __FUNCTION__, killer_ptr, target_ptr, cycle ); |
---|
1001 | #endif |
---|
1002 | |
---|
1003 | // target thread cannot be the main thread, because the main thread |
---|
1004 | // must be deleted by the parent process sys_wait() function |
---|
1005 | owner_cxy = CXY_FROM_PID( pid ); |
---|
1006 | assert( ((owner_cxy != target_cxy) || (target_ltid != 0)), __FUNCTION__, |
---|
1007 | "tharget thread cannot be the main thread\n" ); |
---|
1008 | |
---|
1009 | // block the target thread |
---|
1010 | thread_block( target_xp , THREAD_BLOCKED_GLOBAL ); |
---|
1011 | |
---|
1012 | // get attached from target flag descriptor |
---|
1013 | target_attached = ((hal_remote_lw( target_flags_xp ) & THREAD_FLAG_DETACHED) != 0); |
---|
1014 | |
---|
1015 | // synchronize with the joining thread if the target thread is attached |
---|
1016 | if( target_attached && (is_forced == false) ) |
---|
1017 | { |
---|
1018 | // build extended pointers on target thread join fields |
---|
1019 | target_join_lock_xp = XPTR( target_cxy , &target_ptr->join_lock ); |
---|
1020 | target_join_xp_xp = XPTR( target_cxy , &target_ptr->join_xp ); |
---|
1021 | |
---|
1022 | // enter critical section |
---|
1023 | hal_disable_irq( &save_sr ); |
---|
1024 | |
---|
1025 | // take the join_lock in target thread descriptor |
---|
1026 | remote_spinlock_lock( target_join_lock_xp ); |
---|
1027 | |
---|
1028 | // get join_done from target thread descriptor |
---|
1029 | target_join_done = ((hal_remote_lw( target_flags_xp ) & THREAD_FLAG_JOIN_DONE) != 0); |
---|
1030 | |
---|
1031 | if( target_join_done ) // joining thread arrived first => unblock the joining thread |
---|
1032 | { |
---|
1033 | // get extended pointer on joining thread |
---|
1034 | joining_xp = (xptr_t)hal_remote_lwd( target_join_xp_xp ); |
---|
1035 | joining_ptr = GET_PTR( joining_xp ); |
---|
1036 | joining_cxy = GET_CXY( joining_xp ); |
---|
1037 | |
---|
1038 | // reset the join_done flag in target thread |
---|
1039 | hal_remote_atomic_and( target_flags_xp , ~THREAD_FLAG_JOIN_DONE ); |
---|
1040 | |
---|
1041 | // unblock the joining thread |
---|
1042 | thread_unblock( joining_xp , THREAD_BLOCKED_JOIN ); |
---|
1043 | |
---|
1044 | // release the join_lock in target thread descriptor |
---|
1045 | remote_spinlock_unlock( target_join_lock_xp ); |
---|
1046 | |
---|
1047 | // restore IRQs |
---|
1048 | hal_restore_irq( save_sr ); |
---|
1049 | } |
---|
1050 | else // this thread arrived first => register flags and deschedule |
---|
1051 | { |
---|
1052 | // set the kill_done flag in target thread |
---|
1053 | hal_remote_atomic_or( target_flags_xp , THREAD_FLAG_KILL_DONE ); |
---|
1054 | |
---|
1055 | // block this thread on BLOCKED_JOIN |
---|
1056 | thread_block( killer_xp , THREAD_BLOCKED_JOIN ); |
---|
1057 | |
---|
1058 | // set extended pointer on killer thread in target thread |
---|
1059 | hal_remote_swd( target_join_xp_xp , killer_xp ); |
---|
1060 | |
---|
1061 | // release the join_lock in target thread descriptor |
---|
1062 | remote_spinlock_unlock( target_join_lock_xp ); |
---|
1063 | |
---|
1064 | // deschedule |
---|
1065 | sched_yield( "killer thread wait joining thread" ); |
---|
1066 | |
---|
1067 | // restore IRQs |
---|
1068 | hal_restore_irq( save_sr ); |
---|
1069 | } |
---|
1070 | } // end if attached |
---|
1071 | |
---|
1072 | // set the REQ_DELETE flag in target thread descriptor |
---|
1073 | hal_remote_atomic_or( target_flags_xp , THREAD_FLAG_REQ_DELETE ); |
---|
1074 | |
---|
1075 | #if DEBUG_THREAD_DELETE |
---|
1076 | cycle = (uint32_t)hal_get_cycles; |
---|
1077 | if( DEBUG_THREAD_DELETE < cycle ) |
---|
1078 | printk("\n[DBG] %s : killer thread %x exit for target thread %x / cycle %d\n", |
---|
1079 | __FUNCTION__, killer_ptr, target_ptr, cycle ); |
---|
1080 | #endif |
---|
1081 | |
---|
1082 | } // end thread_delete() |
---|
1083 | |
---|
1084 | |
---|
1085 | |
---|
1086 | /////////////////////// |
---|
1087 | void thread_idle_func() |
---|
1088 | { |
---|
1089 | while( 1 ) |
---|
1090 | { |
---|
1091 | // unmask IRQs |
---|
1092 | hal_enable_irq( NULL ); |
---|
1093 | |
---|
1094 | if( CONFIG_THREAD_IDLE_MODE_SLEEP ) // force core to low-power mode |
---|
1095 | { |
---|
1096 | |
---|
1097 | #if DEBUG_THREAD_IDLE |
---|
1098 | uint32_t cycle = (uint32_t)hal_get_cycles; |
---|
1099 | thread_t * this = CURRENT_THREAD; |
---|
1100 | if( DEBUG_THREAD_IDLE < cycle ) |
---|
1101 | printk("\n[DBG] %s : idle thread %x on core[%x,%d] goes to sleep / cycle %d\n", |
---|
1102 | __FUNCTION__, this, local_cxy, this->core->lid, cycle ); |
---|
1103 | #endif |
---|
1104 | |
---|
1105 | hal_core_sleep(); |
---|
1106 | |
---|
1107 | #if DEBUG_THREAD_IDLE |
---|
1108 | cycle = (uint32_t)hal_get_cycles; |
---|
1109 | if( DEBUG_THREAD_IDLE < cycle ) |
---|
1110 | printk("\n[DBG] %s : idle thread %x on core[%x,%d] wake up / cycle %d\n", |
---|
1111 | __FUNCTION__, this, local_cxy, this->core->lid, cycle ); |
---|
1112 | #endif |
---|
1113 | |
---|
1114 | } |
---|
1115 | else // search a runable thread |
---|
1116 | { |
---|
1117 | sched_yield( "IDLE" ); |
---|
1118 | } |
---|
1119 | } |
---|
1120 | } // end thread_idle() |
---|
1121 | |
---|
1122 | |
---|
1123 | ///////////////////////////////////////////////// |
---|
1124 | void thread_user_time_update( thread_t * thread ) |
---|
1125 | { |
---|
1126 | // TODO |
---|
1127 | // printk("\n[WARNING] function %s not implemented\n", __FUNCTION__ ); |
---|
1128 | } |
---|
1129 | |
---|
1130 | /////////////////////////////////////////////////// |
---|
1131 | void thread_kernel_time_update( thread_t * thread ) |
---|
1132 | { |
---|
1133 | // TODO |
---|
1134 | // printk("\n[WARNING] function %s not implemented\n", __FUNCTION__ ); |
---|
1135 | } |
---|
1136 | |
---|
1137 | ///////////////////////////////////// |
---|
1138 | xptr_t thread_get_xptr( pid_t pid, |
---|
1139 | trdid_t trdid ) |
---|
1140 | { |
---|
1141 | cxy_t target_cxy; // target thread cluster identifier |
---|
1142 | ltid_t target_thread_ltid; // target thread local index |
---|
1143 | thread_t * target_thread_ptr; // target thread local pointer |
---|
1144 | xptr_t target_process_xp; // extended pointer on target process descriptor |
---|
1145 | process_t * target_process_ptr; // local pointer on target process descriptor |
---|
1146 | pid_t target_process_pid; // target process identifier |
---|
1147 | xlist_entry_t root; // root of list of process in target cluster |
---|
1148 | xptr_t lock_xp; // extended pointer on lock protecting this list |
---|
1149 | |
---|
1150 | // get target cluster identifier and local thread identifier |
---|
1151 | target_cxy = CXY_FROM_TRDID( trdid ); |
---|
1152 | target_thread_ltid = LTID_FROM_TRDID( trdid ); |
---|
1153 | |
---|
1154 | // check trdid argument |
---|
1155 | if( (target_thread_ltid >= CONFIG_THREAD_MAX_PER_CLUSTER) || |
---|
1156 | cluster_is_undefined( target_cxy ) ) return XPTR_NULL; |
---|
1157 | |
---|
1158 | // get root of list of process descriptors in target cluster |
---|
1159 | hal_remote_memcpy( XPTR( local_cxy , &root ), |
---|
1160 | XPTR( target_cxy , &LOCAL_CLUSTER->pmgr.local_root ), |
---|
1161 | sizeof(xlist_entry_t) ); |
---|
1162 | |
---|
1163 | // get extended pointer on lock protecting the list of processes |
---|
1164 | lock_xp = XPTR( target_cxy , &LOCAL_CLUSTER->pmgr.local_lock ); |
---|
1165 | |
---|
1166 | // take the lock protecting the list of processes in target cluster |
---|
1167 | remote_spinlock_lock( lock_xp ); |
---|
1168 | |
---|
1169 | // loop on list of process in target cluster to find the PID process |
---|
1170 | xptr_t iter; |
---|
1171 | bool_t found = false; |
---|
1172 | XLIST_FOREACH( XPTR( target_cxy , &LOCAL_CLUSTER->pmgr.local_root ) , iter ) |
---|
1173 | { |
---|
1174 | target_process_xp = XLIST_ELEMENT( iter , process_t , local_list ); |
---|
1175 | target_process_ptr = (process_t *)GET_PTR( target_process_xp ); |
---|
1176 | target_process_pid = hal_remote_lw( XPTR( target_cxy , &target_process_ptr->pid ) ); |
---|
1177 | if( target_process_pid == pid ) |
---|
1178 | { |
---|
1179 | found = true; |
---|
1180 | break; |
---|
1181 | } |
---|
1182 | } |
---|
1183 | |
---|
1184 | // release the lock protecting the list of processes in target cluster |
---|
1185 | remote_spinlock_unlock( lock_xp ); |
---|
1186 | |
---|
1187 | // check PID found |
---|
1188 | if( found == false ) return XPTR_NULL; |
---|
1189 | |
---|
1190 | // get target thread local pointer |
---|
1191 | xptr_t xp = XPTR( target_cxy , &target_process_ptr->th_tbl[target_thread_ltid] ); |
---|
1192 | target_thread_ptr = (thread_t *)hal_remote_lpt( xp ); |
---|
1193 | |
---|
1194 | if( target_thread_ptr == NULL ) return XPTR_NULL; |
---|
1195 | |
---|
1196 | return XPTR( target_cxy , target_thread_ptr ); |
---|
1197 | } |
---|
1198 | |
---|