1 | /* |
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2 | * sys_get.c - Kernel function implementing all non_standard "get_xxx()" syscalls. |
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3 | * |
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4 | * Author Alain Greiner (2016,2017,2018,2019,2020) |
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5 | * |
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6 | * Copyright (c) UPMC Sorbonne Universites |
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7 | * |
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8 | * This file is part of ALMOS-MKH. |
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9 | * |
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10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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11 | * under the terms of the GNU General Public License as published by |
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12 | * the Free Software Foundation; version 2.0 of the License. |
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13 | * |
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14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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17 | * General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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22 | */ |
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23 | |
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24 | #include <hal_kernel_types.h> |
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25 | #include <hal_uspace.h> |
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26 | #include <hal_vmm.h> |
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27 | #include <hal_special.h> |
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28 | #include <errno.h> |
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29 | #include <core.h> |
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30 | #include <thread.h> |
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31 | #include <process.h> |
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32 | #include <vmm.h> |
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33 | #include <printk.h> |
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34 | |
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35 | #include <syscalls.h> |
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36 | |
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37 | ///////////////////////////////////////////////////////////////////////////////// |
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38 | // This function returns a printable string for the sys_get command type. |
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39 | ///////////////////////////////////////////////////////////////////////////////// |
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40 | |
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41 | #if DEBUG_SYS_GET |
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42 | static char* get_cmd_type_str( uint32_t type ) |
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43 | { |
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44 | if ( type == GET_PROCESSES ) return "PROCESSES"; |
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45 | else if( type == GET_CONFIG ) return "CONFIG"; |
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46 | else if( type == GET_CORE_ID ) return "CORE_ID"; |
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47 | else if( type == GET_NB_CORES ) return "NB_CORES"; |
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48 | else if( type == GET_BEST_CORE ) return "BEST_CORE"; |
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49 | else if( type == GET_CYCLE ) return "CYCLE"; |
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50 | else if( type == GET_THREAD_INFO ) return "THREAD_INFO"; |
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51 | else return "undefined"; |
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52 | } |
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53 | #endif |
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54 | |
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55 | ////////////////////////// |
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56 | int sys_get ( reg_t arg0, |
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57 | reg_t arg1, |
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58 | reg_t arg2, |
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59 | reg_t arg3 ) |
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60 | { |
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61 | vseg_t * vseg; |
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62 | int ret; |
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63 | |
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64 | thread_t * this = CURRENT_THREAD; |
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65 | process_t * process = this->process; |
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66 | |
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67 | uint32_t type = arg0; |
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68 | |
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69 | #if DEBUG_SYS_GET || DEBUG_SYSCALLS_ERROR || CONFIG_INSTRUMENTATION_SYSCALLS |
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70 | uint64_t tm_start = hal_get_cycles(); |
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71 | #endif |
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72 | |
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73 | #if DEBUG_SYS_GET |
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74 | if( DEBUG_SYS_GET < (uint32_t)tm_start ) |
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75 | printk("\n[%s] thread[%x,%x] enter / %s / a1 %x / a2 %x / a3 %x / cycle %d\n", |
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76 | __FUNCTION__, process->pid, this->trdid, get_cmd_type_str( type ), |
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77 | arg1, arg2, arg3, (uint32_t)tm_start ); |
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78 | #endif |
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79 | |
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80 | switch( type ) |
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81 | { |
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82 | /////////////// |
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83 | case GET_CYCLE: |
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84 | { |
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85 | char * u_buf = (char *)(intptr_t)arg1; |
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86 | |
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87 | // check buffer in user space |
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88 | if( vmm_get_vseg( process , (intptr_t)arg1 , &vseg ) ) |
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89 | { |
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90 | |
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91 | #if DEBUG_SYSCALLS_ERROR |
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92 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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93 | printk("\n[ERROR] in %s for CYCLE : thread[%x,%x] / user buffer unmapped %x\n", |
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94 | __FUNCTION__ , process->pid , this->trdid , (intptr_t)arg1 ); |
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95 | #endif |
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96 | this->errno = EINVAL; |
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97 | ret = -1; |
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98 | break; |
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99 | } |
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100 | |
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101 | // call relevant core function |
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102 | uint64_t k_cycle = hal_get_cycles(); |
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103 | |
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104 | // copy to user space |
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105 | hal_copy_to_uspace( u_buf, |
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106 | XPTR( local_cxy , &k_cycle ), |
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107 | sizeof(uint64_t) ); |
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108 | ret = 0; |
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109 | break; |
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110 | } |
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111 | /////////////////// |
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112 | case GET_PROCESSES: |
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113 | { |
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114 | uint32_t cxy = ((uint32_t)arg1 >> 16); |
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115 | uint32_t owned = ((uint32_t)arg1 & 0xFFFF); |
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116 | char * u_buf = (char *)(intptr_t)arg2; |
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117 | uint32_t size = (uint32_t)arg3; |
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118 | |
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119 | char k_buf[CONFIG_PROCESS_DISPLAY_BUF_SIZE]; // kernel buffer (one line) |
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120 | |
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121 | uint32_t length; // number of bytes copied in k_buf (without NUL) |
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122 | uint32_t offset = 0; // number of bytes already copied to u_buf |
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123 | xptr_t iter_xp; |
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124 | |
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125 | // check buffer in user space |
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126 | if( vmm_get_vseg( process , (intptr_t)u_buf , &vseg ) ) |
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127 | { |
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128 | |
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129 | #if DEBUG_SYSCALLS_ERROR |
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130 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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131 | printk("\n[ERROR] in %s for PROCESSES : thread[%x,%x] / user buffer unmapped %x\n", |
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132 | __FUNCTION__ , process->pid , this->trdid , (intptr_t)arg2 ); |
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133 | #endif |
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134 | this->errno = EINVAL; |
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135 | ret = -1; |
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136 | break; |
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137 | } |
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138 | |
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139 | #if DEBUG_SYS_GET |
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140 | if( DEBUG_SYS_GET < (uint32_t)tm_start ) |
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141 | printk("\n[%s] for PROCESSES : thread[%x,%x] cxy %x / owned %d\n", |
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142 | __FUNCTION__, process->pid, this->trdid, cxy, owned ); |
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143 | #endif |
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144 | |
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145 | // build extended pointers on root and lock of process list in cluster cxy |
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146 | xptr_t root_xp = XPTR( cxy , &LOCAL_CLUSTER->pmgr.local_root ); |
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147 | xptr_t lock_xp = XPTR( cxy , &LOCAL_CLUSTER->pmgr.local_lock ); |
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148 | |
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149 | // take lock on process list |
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150 | remote_queuelock_acquire( lock_xp ); |
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151 | |
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152 | // loop on all processes in cluster cxy |
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153 | XLIST_FOREACH( root_xp , iter_xp ) |
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154 | { |
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155 | // get process pointers |
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156 | xptr_t process_xp = XLIST_ELEMENT( iter_xp , process_t , local_list ); |
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157 | process_t * process_ptr = GET_PTR( process_xp ); |
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158 | cxy_t process_cxy = GET_CXY( process_xp ); |
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159 | |
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160 | // get process PID |
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161 | pid_t pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) ); |
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162 | |
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163 | #if DEBUG_SYS_GET |
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164 | if( DEBUG_SYS_GET < (uint32_t)tm_start ) |
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165 | printk("\n[%s] for PROCESSES : thread[%x,%x] in FOREACH / pid %x\n", |
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166 | __FUNCTION__, process->pid, this->trdid, pid ); |
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167 | #endif |
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168 | |
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169 | // when owned is set, display only owned user processes |
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170 | if( (owned == 0) || |
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171 | ((CXY_FROM_PID( pid ) == cxy) && (LPID_FROM_PID( pid ) != 0)) ) |
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172 | { |
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173 | // build string for one line (one process descriptor) |
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174 | length = process_build_string( process_xp, |
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175 | k_buf, |
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176 | CONFIG_PROCESS_DISPLAY_BUF_SIZE ); |
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177 | |
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178 | // copy this string to u_buf (with the '\n' , but without the NUL) |
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179 | hal_copy_to_uspace( u_buf + offset, |
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180 | XPTR( local_cxy , k_buf ), |
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181 | length ); |
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182 | // update offset |
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183 | offset += length; |
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184 | } |
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185 | |
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186 | // check user buffer overflow |
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187 | if( (offset + CONFIG_PROCESS_DISPLAY_BUF_SIZE) >= size ) |
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188 | { |
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189 | // build a warning message |
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190 | length = snprintk( k_buf , CONFIG_PROCESS_DISPLAY_BUF_SIZE , |
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191 | " ... user buffer too for all process in cluster %x", cxy ); |
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192 | |
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193 | // copy this string to u_buf |
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194 | hal_copy_to_uspace( u_buf + offset, |
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195 | XPTR( local_cxy , k_buf ), |
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196 | length ); |
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197 | // exit FOREACH loop |
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198 | break; |
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199 | } |
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200 | else // add the NUL character in u_buf |
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201 | { |
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202 | char byte = 0; |
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203 | |
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204 | // copy this NUL character to u_buf |
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205 | hal_copy_to_uspace( u_buf + offset, |
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206 | XPTR( local_cxy , &byte ), |
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207 | 1 ); |
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208 | } |
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209 | } // end FOREACH |
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210 | |
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211 | // release lock on process list |
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212 | remote_queuelock_release( lock_xp ); |
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213 | |
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214 | ret = 0; |
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215 | break; |
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216 | } |
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217 | //////////////// |
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218 | case GET_CONFIG: |
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219 | { |
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220 | hard_config_t * u_config = (hard_config_t *)arg1; |
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221 | |
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222 | hard_config_t k_config; // local kernel structure |
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223 | |
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224 | // check u_config mapped in user space |
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225 | if( vmm_get_vseg( process , (intptr_t)u_config , &vseg ) ) |
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226 | { |
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227 | |
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228 | #if DEBUG_SYSCALLS_ERROR |
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229 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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230 | printk("\n[ERROR] in %s for CONFIG : thread[%x,%x] / user pointer %x unmapped\n", |
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231 | __FUNCTION__ , process->pid , this->trdid , (intptr_t)u_config ); |
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232 | #endif |
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233 | this->errno = EINVAL; |
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234 | ret = -1; |
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235 | break; |
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236 | } |
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237 | |
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238 | // copy config parameters from cluster descriptor to kernel structure |
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239 | k_config.x_size = LOCAL_CLUSTER->x_size; |
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240 | k_config.y_size = LOCAL_CLUSTER->y_size; |
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241 | k_config.ncores = LOCAL_CLUSTER->cores_nr; |
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242 | k_config.txt_channels = LOCAL_CLUSTER->nb_txt_channels; |
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243 | k_config.nic_channels = LOCAL_CLUSTER->nb_nic_channels; |
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244 | k_config.ioc_channels = LOCAL_CLUSTER->nb_ioc_channels; |
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245 | k_config.fbf_channels = LOCAL_CLUSTER->nb_fbf_channels; |
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246 | |
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247 | // copy k_config structure to user space |
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248 | hal_copy_to_uspace( u_config , |
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249 | XPTR(local_cxy, &k_config ), |
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250 | sizeof(hard_config_t) ); |
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251 | ret = 0; |
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252 | break; |
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253 | } |
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254 | ///////////////// |
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255 | case GET_CORE_ID: |
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256 | { |
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257 | uint32_t * u_cxy = (uint32_t *)arg1; |
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258 | uint32_t * u_lid = (uint32_t *)arg2; |
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259 | |
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260 | // check cxy buffer in user space |
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261 | if( vmm_get_vseg( process , (intptr_t)u_cxy , &vseg ) ) |
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262 | { |
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263 | |
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264 | #if DEBUG_SYSCALLS_ERROR |
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265 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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266 | printk("\n[ERROR] in %s for CORE_ID : thread[%x,%x] / cxy buffer unmapped %x\n", |
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267 | __FUNCTION__ , process->pid , this->trdid , (intptr_t)u_cxy ); |
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268 | #endif |
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269 | this->errno = EINVAL; |
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270 | ret = -1; |
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271 | break; |
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272 | } |
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273 | |
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274 | // check lid buffer in user space |
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275 | if( vmm_get_vseg( process , (intptr_t)u_lid , &vseg ) ) |
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276 | { |
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277 | |
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278 | #if DEBUG_SYSCALLS_ERROR |
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279 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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280 | printk("\n[ERROR] in %s for CORE_ID : thread[%x,%x] / lid buffer unmapped %x\n", |
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281 | __FUNCTION__ , process->pid , this->trdid , (intptr_t)u_lid ); |
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282 | #endif |
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283 | this->errno = EINVAL; |
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284 | ret = -1; |
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285 | break; |
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286 | } |
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287 | |
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288 | // get lid from core decriptor |
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289 | lid_t lid = this->core->lid; |
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290 | |
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291 | // copy cxy to user space |
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292 | hal_copy_to_uspace( u_cxy, |
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293 | XPTR( local_cxy , &local_cxy ), |
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294 | sizeof(uint32_t) ); |
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295 | |
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296 | hal_copy_to_uspace( u_lid, |
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297 | XPTR( local_cxy , &lid ), |
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298 | sizeof(uint32_t) ); |
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299 | ret = 0; |
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300 | break; |
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301 | } |
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302 | ////////////////// |
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303 | case GET_NB_CORES: |
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304 | { |
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305 | uint32_t cores; |
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306 | cxy_t cxy = arg1; |
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307 | uint32_t * u_cores = (uint32_t *)arg2; |
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308 | |
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309 | // check ncores buffer in user space |
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310 | if( vmm_get_vseg( process , (intptr_t)u_cores , &vseg ) ) |
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311 | { |
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312 | |
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313 | #if DEBUG_SYSCALLS_ERROR |
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314 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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315 | printk("\n[ERROR] in %s for NB_CORES : thread[%x,%x] / user buffer unmapped %x\n", |
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316 | __FUNCTION__ , process->pid , this->trdid , (intptr_t)u_cores ); |
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317 | #endif |
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318 | this->errno = EFAULT; |
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319 | ret = -1; |
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320 | break; |
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321 | } |
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322 | |
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323 | // get number of cores in cluster |
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324 | if( cluster_is_active( cxy ) ) |
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325 | { |
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326 | cores = hal_remote_l32( XPTR( cxy , &LOCAL_CLUSTER->cores_nr ) ); |
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327 | } |
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328 | else // target cluster undefined |
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329 | { |
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330 | cores = 0; |
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331 | } |
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332 | |
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333 | // copy to user space |
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334 | hal_copy_to_uspace( u_cores, |
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335 | XPTR( local_cxy , &cores ), |
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336 | sizeof(uint32_t) ); |
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337 | ret = 0; |
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338 | break; |
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339 | } |
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340 | /////////////////// |
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341 | case GET_BEST_CORE: |
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342 | { |
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343 | uint32_t base_cxy = ((uint32_t)arg1 >> 16); |
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344 | uint32_t level = ((uint32_t)arg1 & 0xFFFF); |
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345 | uint32_t * cxy = (uint32_t *)(intptr_t)arg2; |
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346 | uint32_t * lid = (uint32_t *)(intptr_t)arg3; |
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347 | |
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348 | uint32_t k_cxy; |
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349 | uint32_t k_lid; |
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350 | |
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351 | // check <cxy> buffer in user space |
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352 | if( vmm_get_vseg( process , (intptr_t)cxy , &vseg ) ) |
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353 | { |
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354 | |
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355 | #if DEBUG_SYSCALLS_ERROR |
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356 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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357 | printk("\n[ERROR] in %s for BEST_CORE : thread[%x,%x] / user buffer cxy unmapped %x\n", |
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358 | __FUNCTION__ , process->pid , this->trdid , cxy ); |
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359 | #endif |
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360 | this->errno = EINVAL; |
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361 | ret = -1; |
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362 | break; |
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363 | } |
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364 | |
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365 | // check <lid> buffer in user space |
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366 | if( vmm_get_vseg( process , (intptr_t)lid , &vseg ) ) |
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367 | { |
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368 | |
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369 | #if DEBUG_SYSCALLS_ERROR |
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370 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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371 | printk("\n[ERROR] in %s for BEST_CORE : thread[%x,%x] / user buffer lid unmapped %x\n", |
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372 | __FUNCTION__ , process->pid , this->trdid , lid ); |
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373 | #endif |
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374 | this->errno = EINVAL; |
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375 | ret = -1; |
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376 | break; |
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377 | } |
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378 | |
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379 | // check level argument |
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380 | if( level > 5 ) |
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381 | { |
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382 | |
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383 | #if DEBUG_SYSCALLS_ERROR |
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384 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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385 | printk("\n[ERROR] in %s for BEST_CORE : thread[%x,%x] / level argument %d too large\n", |
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386 | __FUNCTION__ , process->pid , this->trdid , level ); |
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387 | #endif |
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388 | this->errno = EINVAL; |
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389 | ret = -1; |
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390 | break; |
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391 | } |
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392 | |
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393 | // get extended pointer on the macro-cluster DQDT root node |
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394 | xptr_t root_xp = dqdt_get_root( base_cxy , level ); |
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395 | |
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396 | if( root_xp == XPTR_NULL ) // macro-cluster undefined |
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397 | { |
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398 | |
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399 | #if DEBUG_SYSCALLS_ERROR |
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400 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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401 | printk("\n[ERROR] in %s for BEST_CORE ; thread[%x,%x] DQDT undefined\n", |
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402 | __FUNCTION__, process->pid, this->trdid ); |
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403 | #endif |
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404 | this->errno = EINVAL; |
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405 | ret = -1; |
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406 | break; |
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407 | } |
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408 | |
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409 | // get best core in best cluster |
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410 | k_cxy = (uint32_t)dqdt_get_cluster_for_thread( root_xp ); |
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411 | k_lid = (uint32_t)cluster_select_local_core( k_cxy ); |
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412 | |
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413 | // copy to user space |
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414 | hal_copy_to_uspace( cxy, |
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415 | XPTR( local_cxy , &k_cxy ), |
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416 | sizeof(uint32_t) ); |
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417 | |
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418 | hal_copy_to_uspace( lid, |
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419 | XPTR( local_cxy , &k_lid ), |
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420 | sizeof(uint32_t) ); |
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421 | ret = 0; |
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422 | break; |
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423 | } |
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424 | ///////////////////// |
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425 | case GET_THREAD_INFO: |
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426 | { |
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427 | thread_info_t * u_info = (thread_info_t *)arg1; |
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428 | |
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429 | // check buffer in user space |
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430 | if( vmm_get_vseg( process , (intptr_t)u_info , &vseg ) ) |
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431 | { |
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432 | |
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433 | #if DEBUG_SYSCALLS_ERROR |
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434 | if( DEBUG_SYSCALLS_ERROR < (uint32_t)tm_start ) |
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435 | printk("\n[ERROR] in %s for THREAD_INFO : thread[%x,%x] / user buffer unmapped %x\n", |
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436 | __FUNCTION__ , process->pid , this->trdid , (intptr_t)u_info ); |
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437 | #endif |
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438 | this->errno = EINVAL; |
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439 | ret = -1; |
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440 | break; |
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441 | } |
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442 | |
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443 | // copy this thread_info_t structure to user space |
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444 | hal_copy_to_uspace( u_info, |
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445 | XPTR( local_cxy , &this->info), |
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446 | sizeof(thread_info_t) ); |
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447 | ret = 0; |
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448 | break; |
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449 | } |
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450 | default: |
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451 | { |
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452 | ret = -1; |
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453 | } |
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454 | } // end switch cmd |
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455 | |
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456 | hal_fence(); |
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457 | |
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458 | #if (DEBUG_SYS_GET || CONFIG_INSTRUMENTATION_SYSCALLS) |
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459 | uint64_t tm_end = hal_get_cycles(); |
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460 | #endif |
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461 | |
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462 | #if DEBUG_SYS_GET |
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463 | if( DEBUG_SYS_GET < tm_end ) |
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464 | printk("\n[%s] thread[%x,%x] exit / cycle %d\n", |
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465 | __FUNCTION__ , process->pid, this->trdid, (uint32_t)tm_end ); |
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466 | #endif |
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467 | |
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468 | #if CONFIG_INSTRUMENTATION_SYSCALLS |
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469 | hal_atomic_add( &syscalls_cumul_cost[SYS_GET] , tm_end - tm_start ); |
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470 | hal_atomic_add( &syscalls_occurences[SYS_GET] , 1 ); |
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471 | #endif |
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472 | |
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473 | return ret; |
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474 | |
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475 | } // end sys_get() |
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