FreeCalypso > hg > fc-tourmaline
annotate cdg-hybrid/msg/tst.mdf @ 220:0ed36de51973
ABB semaphore protection overhaul
The ABB semaphone protection logic that came with TCS211 from TI
was broken in several ways:
* Some semaphore-protected functions were called from Application_Initialize()
context. NU_Obtain_Semaphore() called with NU_SUSPEND fails with
NU_INVALID_SUSPEND in this context, but the return value wasn't checked,
and NU_Release_Semaphore() would be called unconditionally at the end.
The latter call would increment the semaphore count past 1, making the
semaphore no longer binary and thus no longer effective for resource
protection. The fix is to check the return value from NU_Obtain_Semaphore()
and skip the NU_Release_Semaphore() call if the semaphore wasn't properly
obtained.
* Some SPI hardware manipulation was being done before entering the semaphore-
protected critical section. The fix is to reorder the code: first obtain
the semaphore, then do everything else.
* In the corner case of L1/DSP recovery, l1_abb_power_on() would call some
non-semaphore-protected ABB & SPI init functions. The fix is to skip those
calls in the case of recovery.
* A few additional corner cases existed, all of which are fixed by making
ABB semaphore protection 100% consistent for all ABB functions and code paths.
There is still one remaining problem of priority inversion: suppose a low-
priority task calls an ABB function, and some medium-priority task just happens
to preempt right in the middle of that semaphore-protected ABB operation. Then
the high-priority SPI task is locked out for a non-deterministic time until
that medium-priority task finishes its work and goes back to sleep. This
priority inversion problem remains outstanding for now.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 26 Apr 2021 20:55:25 +0000 |
parents | 35f7a1dc9f7d |
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rev | line source |
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1 ;******************************************************************************** |
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2 ;*** File : tst.mdf |
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3 ;*** Creation : Thu Jun 19 15:32:14 CST 2008 |
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4 ;*** XSLT Processor : Apache Software Foundation / http://xml.apache.org/xalan-j / supports XSLT-Ver: 1 |
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5 ;*** Copyright : (c) Texas Instruments AG, Berlin Germany 2002 |
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6 ;******************************************************************************** |
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7 ;*** Document Type : Air Interface Message Specification |
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8 ;*** Document Name : tst |
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9 ;*** Document No. : 8441.603.99.005 |
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10 ;*** Document Date : 2000-10-23 |
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11 ;*** Document Status: BEING_PROCESSED |
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12 ;*** Document Author: ANS |
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13 ;******************************************************************************** |
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14 |
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17 PRAGMA SRC_FILE_TIME "Wed Nov 28 10:21:30 2007" |
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18 PRAGMA LAST_MODIFIED "2000-10-23" |
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19 PRAGMA ID_AND_VERSION "8441.603.99.005" |
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20 |
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21 |
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22 |
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23 CONST L3MAX 251 ; maximum size of a L3 buffer |
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24 CONST MAX_N_PDU_NUMBER_LIST 11 ; maximum size of N-PDU number list |
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25 |
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26 |
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27 |
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28 VALTAB VAL_no_of_pdus |
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29 VAL DEF "Number of PDUs to transmit" |
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30 VAL 0 TEST_INFINITIVE_NO "ciphering not used" |
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31 |
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32 VALTAB VAL_dl_timeslot_offset |
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33 VAL 0 TEST_TN0 "downlink timeslot offsett 0" |
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34 VAL 1 TEST_TN1 "downlink timeslot offsett 1" |
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35 VAL 2 TEST_TN2 "downlink timeslot offsett 2" |
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36 VAL 3 TEST_TN3 "downlink timeslot offsett 3" |
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37 VAL 4 TEST_TN4 "downlink timeslot offsett 4" |
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38 VAL 5 TEST_TN5 "downlink timeslot offsett 5" |
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39 VAL 6 TEST_TN6 "downlink timeslot offsett 6" |
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40 VAL 7 TEST_TN7 "downlink timeslot offsett 7" |
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41 |
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42 VALTAB VAL_mode_flag_val |
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43 VAL 0 TEST_RANDOM "pseudorandom data" |
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44 VAL 1 TEST_LOOP "loop back" |
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45 |
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46 |
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47 |
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48 |
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49 VAR msg_type "Message Type" |
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50 8 |
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51 |
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52 |
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53 VAR no_of_pdus "Number of PDUs" |
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54 12 |
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55 |
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56 VAL @m_tst - VAL_no_of_pdus@ |
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57 |
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58 VAR dl_timeslot_offset "Downlink Timeslot Offset" |
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59 3 |
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60 |
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61 VAL @m_tst - VAL_dl_timeslot_offset@ |
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62 |
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63 VAR mode_flag_val "Mode Flag Value" |
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64 1 |
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65 |
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66 VAL @m_tst - VAL_mode_flag_val@ |
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67 |
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68 |
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69 |
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70 |
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71 COMP pdu_description "PDU Description" |
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72 { |
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73 .000 ; spare |
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74 no_of_pdus ; Number |
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75 } |
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76 |
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77 |
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78 |
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79 COMP pdu_description_ie "PDU Description IE" |
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80 { |
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81 CSN1_S1 pdu_description ; PDU Description |
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82 } |
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83 |
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84 |
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85 |
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86 COMP mode_flag "Mode Flag" |
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87 { |
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88 .0000 ; spare |
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89 dl_timeslot_offset ; Downlink Timeslot Offset |
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90 mode_flag_val ; Mode Flag Value |
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91 } |
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92 |
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93 |
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94 |
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95 |
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96 |
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97 |
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98 MSG gprs_test_mode_cmd downlink 36 ; gprs_test_mode_cmd |
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99 { |
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100 GSM3_V msg_type ; Message Type |
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101 GSM3_V pdu_description_ie ; PDU description |
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102 GSM3_V mode_flag ; Mode Flag |
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103 } |
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104 |
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105 |
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106 |
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107 |
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108 |
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109 |