changeset 349:ed3e588600c1 default tip

README update for the successful completion of the L1 reconstruction project
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 30 Oct 2017 18:03:24 +0000
parents bc7ca94e52e7
children
files README
diffstat 1 files changed, 21 insertions(+), 24 deletions(-) [+]
line wrap: on
line diff
--- a/README	Mon Oct 30 17:27:58 2017 +0000
+++ b/README	Mon Oct 30 18:03:24 2017 +0000
@@ -1,16 +1,19 @@
-This Hg repository contains a version of TI's TCS211 firmware based on our sole
-available TCS211 semi-src with the L1 component almost fully deblobbed.
-Specifically, we have deblobbed all of L1 with the exception of GPRS-specific
-l1p_*, macs and p_tpudr12 modules - all other L1 modules are recompiled from
-reconstructed C sources, producing objects that work in the place of the
-original blobs - sometimes matching bit for bit, in other cases differing in
-the bits, but matching in logic.  See STATUS for a detailed analysis of the
-reconstruction matches and differences.
+This Hg repository contains the result of the two year long project to deblob
+the L1 component in our copy of TCS211 from Sotovik by reconstructing the lost
+C source - see the Hg history for how this reconstruction has been accomplished.
+This reconstruction and deblobbing of TCS211 L1 is now complete: BuSyB XML
+config file g23m/system/busyb/deliverydefs/dlvcfg0.xml has been edited to
+rebuild all of L1 from source (L1_LIB_DLV, L1_CUST_LIB_DLV and L1_TPU_LIB_DLV
+all set to 0), pdt_2091.mak has been regenerated in this configuration, and all
+L1 libs are compiled from the reconstructed source under chipsetsw/layer1.
 
-Building the firmware in this tree requires a trick because of the not-yet-
-deblobbed L1_GPRS modules - see README.old for the details.  This tree only
-supports the original gtamodem target; see FreeCalypso Magnetite for other
-target support.
+In most cases the reconstructed C source is perfect in that the resulting
+object is a bit-for-bit match to the original blob; in other cases the bits do
+not match exactly, but the logic has been verified to match nonetheless.  See
+STATUS for a detailed analysis of the reconstruction matches and differences.
+
+This tree only supports the original gtamodem target; see FreeCalypso Magnetite
+for other target support.
 
 Choice of version for reconstruction
 ====================================
@@ -26,12 +29,12 @@
 The differences between the two versions are limited to just 3 objects:
 l1_cmplx.obj and l1p_cmpl.obj in l1_ext.lib, and l1_ctl.obj in l1_int.lib.
 
-When we were reconstructing l1_cmplx.c and l1_ctl.c from the available LoCosto
-source, the reconstruction of the original 20070608 version came more easily
-than the 20080421 update, and our reconstruction of these two modules matches
-the 20070608 objects bit for bit.  It thus appears that whatever changes TI's
-customer support group made in that 20080421 version were not on TI's internal
-mainline.
+When we were reconstructing l1_cmplx.c, l1_ctl.c and l1p_cmpl.c from the
+available LoCosto source, the reconstruction of the original 20070608 version
+came more easily than the 20080421 update, and our reconstruction of these 3
+modules matches the 20070608 objects bit for bit.  It thus appears that
+whatever changes TI's customer support group made in that 20080421 version were
+not on TI's internal mainline.
 
 Because the 20080421 L1 libs update was made for no other purpose except an
 attempt to debug or fix what was erroneously believed to be a firmware problem
@@ -40,9 +43,3 @@
 20070608 version was easier to source-reconstruct than the other, we are
 adopting the original 20070608 version and our reconstruction of its C source
 form as the canonical version of TCS211 L1 for FreeCalypso.
-
-Note that because we have not source-reconstructed the GPRS-specific l1p_*
-modules yet, we haven't looked at the l1p_cmpl.obj differences yet.  However,
-when building a complete fw image with GPRS included using our partially
-reconstructed L1, one should use the 20070608 version of the l1p_cmpl.obj blob
-for consistency, like we do in FreeCalypso Magnetite.