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fc-target.h preprocessor symbols: introduce CONFIG_TARGET_LEO_RFFE Out of our currently existing supported targets, Leonardo and Tango use TI's classic Leonardo RFFE wiring. However, we would like to use the same quadband RFFE with the same classic wiring on our FreeCalypso Libre Dumbphone handset, and also on the planned development board that will serve as a stepping stone toward that goal. Therefore, we introduce the new CONFIG_TARGET_LEO_RFFE preprocessor symbol, and conditionalize on this symbol in tpudrv12.h, instead of a growing || of different targets.
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 09 Jun 2021 07:26:51 +0000
parents a1799f6d6aa7
children
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a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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1 The specific integration of ATI Nucleus PLUS RTOS in TI's stable TCS211 fw
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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2 (which served as the baseline for several vendors' production fw) exhibits one
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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3 hair-raising bug. While we don't know for sure where and how they maintained
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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4 Nucleus library sources for compilation (the version we got has them censored
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5 out), we do see that Nucleus header files (nucleus.h and ??_defs.h) exist in
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6 two different locations in the source tree in two different versions:
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7
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8 * One version exists under chipsetsw/os/nucleus
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9 * The other version exists under gpf/inc/nuc & gpf/inc/nuc/arm7
a1799f6d6aa7 doc/Nucleus-change article written
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10
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Mychaela Falconia <falcon@freecalypso.org>
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11 The two versions of these header files under these two paths in TCS211 are not
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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12 the same! The main nucleus.h header file is the same in both places, cs_defs.h
a1799f6d6aa7 doc/Nucleus-change article written
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13 and tm_defs.h versions differ only in comments, but tc_defs.h is the real
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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14 kicker: the version under gpf/inc/nuc has an extra field added to the TC_HCB
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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15 aka NU_HISR structure, making this structure one word longer than in the other
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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16 version! More specifically, in ATI's original Nucleus this structure is 22
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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17 words long with 4 unused dummy words at the end; TI's GPF version adds a fifth
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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18 dummy word (thankfully toward the end, not shifting any actually-used members
a1799f6d6aa7 doc/Nucleus-change article written
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19 of the struct), putting the total struct size at 23 words.
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20
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21 It would be one thing if TI had made this change consistently, but they didn't:
a1799f6d6aa7 doc/Nucleus-change article written
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22 some modules were compiled with one version of the headers and got the 22-word
a1799f6d6aa7 doc/Nucleus-change article written
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23 version of the struct, while other modules were compiled with the other header
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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24 file version and got the 23-word version of the struct. How can their fw work
a1799f6d6aa7 doc/Nucleus-change article written
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25 with this bug in it? Answer: TCS211 fw works despite this Nucleus integration
a1799f6d6aa7 doc/Nucleus-change article written
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26 bug because:
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27
a1799f6d6aa7 doc/Nucleus-change article written
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28 * None of the actually-used members of the struct change offsets between the
a1799f6d6aa7 doc/Nucleus-change article written
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29 two versions;
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30
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31 * Some places in the code have 22-word structs allocated in memory while other
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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32 places have 23-word structs, but when they pass pointers to these structs to
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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33 Nucleus API functions, those functions don't access past the actually-used
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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34 part at the beginning (the part before dummy words), and they never do
a1799f6d6aa7 doc/Nucleus-change article written
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35 anything like zeroing out the full size of the expected struct.
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36
a1799f6d6aa7 doc/Nucleus-change article written
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37 * The only place in TCS211 fw where the total size of the struct matters is
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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38 where NU_HISR is embedded in another structure, and there is one such place
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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39 in GPF. Here breakage would result if different modules using these structs
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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40 and arrays were compiled with different header file versions, but all modules
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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41 that touch this part are compiled with the GPF version of nucleus.h, NU_DEBUG
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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42 and tc_defs.h.
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43
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44 Needless to say, resolving this bogosity has been an important part of
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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45 FreeCalypso firmware deblobbing. Naturally the most ideal solution would have
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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46 been to remove the bogus extra word added by TI and consistently use the
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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47 original 22-word struct everywhere, but there is one further complication: I
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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48 (Mother Mychaela) don't feel comfortable with moving away from the original blob
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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49 version of the OSL component of GPF, and these COFF objects have been compiled
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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50 with the 23-word version of TC_HCB aka NU_HISR.
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51
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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52 The following alternative approach has been implemented in FC Tourmaline:
a1799f6d6aa7 doc/Nucleus-change article written
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53
a1799f6d6aa7 doc/Nucleus-change article written
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54 * The new source version of Nucleus by Comrade XVilka has been checked in under
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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55 src/nucleus, and this new source version is the one we are using instead of
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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56 TI's binary object version.
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57
a1799f6d6aa7 doc/Nucleus-change article written
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58 * The new Nucleus header files src/nucleus/nucleus.h and src/nucleus/??_defs.h
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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59 are the only ones used in Tourmaline - both old versions have been removed
a1799f6d6aa7 doc/Nucleus-change article written
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60 from active -I include paths.
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61
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62 * The new src/nucleus/tc_defs.h header file has been patched to replicate TI's
a1799f6d6aa7 doc/Nucleus-change article written
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63 23-word version of TC_HCB aka NU_HISR, and the NU_HISR_SIZE definition in
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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64 src/nucleus/nucleus.h has also been adjusted to match.
a1799f6d6aa7 doc/Nucleus-change article written
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65
a1799f6d6aa7 doc/Nucleus-change article written
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66 Thus we are using the 23-word version of TC_HCB aka NU_HISR everywhere, with 5
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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67 dummy words at the end rather than 4, adding 4 extra bytes of wasted RAM space
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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68 to every instance of this struct throughout the firmware - but there are only a
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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69 small number of these instances, thus the waste is negligible. In return we
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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70 gain 100% consistency (the same version of the struct is used everywhere in our
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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71 fw), and we retain the ability to keep the original OSL blobs which I am not
a1799f6d6aa7 doc/Nucleus-change article written
Mychaela Falconia <falcon@freecalypso.org>
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72 ready to give up.