FreeCalypso > hg > freecalypso-sw

annotate gsm-fw/L1/stand/README @ 972:6de5661d1fe1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
gsm-fw/services/etm/etm_api.c: same fix in etm_pkt_send() as in tcs211-c139
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Fri, 13 Nov 2015 19:29:16 +0000
parents 4d40f9a99445
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
613
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1 In their internal development environment, TI had a way to build L1 standalone,
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
2 i.e., omitting the G23 protocol stack and other large and complex pieces of the
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
3 full firmware. Such an ability is essential for sane development, and the
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
4 abundant references to OP_L1_STANDALONE throughout the codebase confirm that TI
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
5 had it indeed.
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
6
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
7 However, we (FreeCalypso) don't have a way to build an OP_L1_STANDALONE image
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
8 exactly the way TI did it - we don't have all of the necessary source - the
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
9 glue pieces specific to this configuration are missing. Nor do we necessarily
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
10 need to imitate what TI did in this department: it appears that TI's standalone
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
11 L1 build omitted GPF (with the exception of OS and OSX) and everything that
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
12 lives in Riviera land, but for us the situation is different: we already have
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
13 a successful build with Riviera and GPF, but no L1, thus we simply need to add
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
14 L1 to what we have. Our idea of standalone L1 simply means building without
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
15 the G23 stack, which we have yet to begin integrating.
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
16
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
17 In the standard firmware build, there is a component called L1 PEI. It is part
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
18 of the G23 stack, and has header and library dependencies of the latter - thus
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
19 it is *not* part of the L1 code proper. However, it performs some essential
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
20 initialization steps, and runs the L1A task. We don't know how TI handled
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
21 these functions in their standalone L1 build - we don't have that part of their
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
22 source, not even in the otherwise complete LoCosto version, not even if we were
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
23 targeting LoCosto hardware.
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
24
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
25 Our solution: we are going to lift l1_pei out of LoCosto's g23m-gsm, and hack
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
26 up a special version of it that won't have the standard complement of G23
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
27 header and library dependencies. It is virtually certain that TI did something
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
28 different, but our hack-solution should work for our needs.
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
29
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
30 Because our standalone L1 build is a specially stripped-down version of the
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
31 regular fw build, and not at all like TI's standalone L1, we do NOT define
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
32 OP_L1_STANDALONE. Instead we have a different preprocessor symbol:
9e605ec89ed0 gsm-fw/L1/stand: starting work on our version of standalone L1
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
33 CONFIG_L1_STANDALONE.
616
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
34
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
35 The standard version of l1_pei calls vsi_c_open() to get queue handles of
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
36 several G23 stack entities; it connects by name to "PL", "MMI", and if GPRS is
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
37 enabled, also to "GRR", "LLC" and "SND". If we leave these connect-by-name
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
38 calls unchanged in our L1 standalone version, our pei_init() will always return
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
39 PEI_ERROR and never successfully initialize, which would not be very useful.
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
40 If we removed these vsi_c_open() calls and the associated OSX queue setup, the
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
41 first osx_send_prim() addressed to the queue in question will crash, so that
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
42 approach wouldn't be useful either.
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
43
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
44 What we would like to do is redirect all outbound messages emitted by our
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
45 standalone L1 to the debug serial interface, using GPF's TST entity, just as if
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
46 an L1 REDIRECT or DUPLICATE command was given to a complete GSM fw image.
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
47 However, simply connecting our queues to TST won't work, as TST is not designed
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
48 to receive "internal" protocol stack primitives directly. When the routing
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
49 facility is used to DUPLICATE or REDIRECT a prim to an external entity, the
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
50 code in gpf/frame/route.c sends a special "wrapper" prim to TST, and we need to
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
51 replicate this wrapping in order to achieve the same effect.
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
52
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
53 Our solution: we are going to construct a special forwarder entity called L1IF,
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
54 and the connect-by-name calls in l1_pei which normally point to PL, MMI etc
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
55 will point to L1IF instead. L1IF will run in the passive body variant, and its
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
56 pei_primitive() function will replicate the routing facility's logic for
4d40f9a99445 gsm-fw/L1/stand: plan to use L1IF forwarder entity
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 613
diff changeset
57 forwarding PS primitives to TST. Whew!