FreeCalypso > hg > tcs211-l1-reconst

annotate gpf/CCD/util/readme.txt @ 285:4d9af8de3973

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STATUS: dl1_com differences analyzed and documented
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 14 Mar 2017 20:52:00 +0000
parents 509db1a7b7b8
children
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1 Tools supporting CCD stack size calculation
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2 ===========================================
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3
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4 1. ccd_stacksize.exe
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5 --------------------
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6
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7 If gnumake is called in \gpf\CCD\util, an executable
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8 ccd_stacksize.exe is created. This programm prints the
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9 needed stacksize for encoding respectively decoding
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10 each message defined in the actual ccddata_dll.dll.
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11 In addition the recursion level (level of substructures)
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12 is printed.
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13 With gnumake configuration parameters can be supplied,
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14 depending on which CCD variant is to be used.
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15 MEMSUPER, TRACE, and DEBUG are possible parameters, e.g.
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16
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17 gnumake MEMSUPER=1 DEBUG=1 TRACE=0
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18
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19 creates a ccd_stacksize.exe for a CCD compiled with partition
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20 supervision, debug information, but without tracing functionality.
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21 Supported platforms are arm7 and arm9, default is arm7.
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22 With the configuration parameter PLATFORM=arm9 the corresponding
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23 version for the arm9 is created.
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24
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25 The output of ccd_stacksize.exe looks like this:
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26
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27 MSG ENC DEC REC-LEVEL
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28 ==========================================================
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29 MS_RF_CAPABILITY 532 512 4
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30 U_ALERT 356 404 2
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31 [ ... more output lines ...]
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32 MOD_PDP_ACC 152 116 0
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33 SM_STATUS 348 320 2
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34
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35 That means e.g. that for encoding a U_ALERT message,
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36 356 bytes of stack is needed.
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37
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38 With
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39
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40 ccd_stacksize -api
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41
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42 a list of the remaining, non message related functions of CCD
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43 and their needed amout of stack is printed:
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44
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45 ccd_init 64
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46 ccd_exit 40
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47 ccd_begin 32
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48 ccd_end 32
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49 [ ... more output lines ...]
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50
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51 In the current version the stack needed for calling frame
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52 functions are not yet considered.
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53
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54 2. globs.bat
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55 ------------
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56 For those entities that require a reentrant CCD (GRR in GPRS;
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57 RRC and RCM in UMTS) an own set of CCD internal data is needed.
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58 It was required by REDMEM to particularly distinguish between GSM
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59 only and GPRS (i.e. without/with GRR on the arm7). Therefore the
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60 block of internal CCD data for GRR is no longer statically declared.
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61 Instead CCD finds out if GRR calls ccd_init and tries then to
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62 dynamically allocate the memory for the data. That implies,
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63 that a big enough partition in xxxconst.h must be supplied.
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64
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65 The batch file globs.bat calculates the amount of memory needed
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66 for one set of CCD internal data in several configurations.
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67 The actual values for CCD_2.6.0 are:
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68
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69 - for a non-tracing CCD on ARM7: 1600
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70 - for a tracing CCD on ARM7: 1656
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71 - for a non-tracing CCD on ARM9: 1604
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72 - for a tracing CCD on ARM9: 1740
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73 - for a non-tracing CCD on PC: 2634
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74 - for a tracing CCD on PC: 2771
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75
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76 That means e.g. for a GPRS arm7 target version, a data partition of
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77 1600/1656 bytes must be available.